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-rw-r--r--backport/compat/verification/mbedtls/asn1.h344
-rw-r--r--backport/compat/verification/mbedtls/bignum.h760
-rw-r--r--backport/compat/verification/mbedtls/bn_mul.h887
-rw-r--r--backport/compat/verification/mbedtls/config.h15
-rw-r--r--backport/compat/verification/mbedtls/md.h356
-rw-r--r--backport/compat/verification/mbedtls/md_internal.h116
-rw-r--r--backport/compat/verification/mbedtls/oid.h572
-rw-r--r--backport/compat/verification/mbedtls/pk.h618
-rw-r--r--backport/compat/verification/mbedtls/platform.h12
-rw-r--r--backport/compat/verification/mbedtls/rsa.h672
-rw-r--r--backport/compat/verification/mbedtls/sha1.h135
-rw-r--r--backport/compat/verification/mbedtls/sha256.h140
12 files changed, 4627 insertions, 0 deletions
diff --git a/backport/compat/verification/mbedtls/asn1.h b/backport/compat/verification/mbedtls/asn1.h
new file mode 100644
index 00000000..bc6b48b8
--- /dev/null
+++ b/backport/compat/verification/mbedtls/asn1.h
@@ -0,0 +1,344 @@
+/**
+ * \file asn1.h
+ *
+ * \brief Generic ASN.1 parsing
+ *
+ * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
+ * SPDX-License-Identifier: GPL-2.0
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * This file is part of mbed TLS (https://tls.mbed.org)
+ */
+#ifndef MBEDTLS_ASN1_H
+#define MBEDTLS_ASN1_H
+
+#if !defined(MBEDTLS_CONFIG_FILE)
+#include "config.h"
+#else
+#include MBEDTLS_CONFIG_FILE
+#endif
+
+#include <stddef.h>
+
+#if defined(MBEDTLS_BIGNUM_C)
+#include "bignum.h"
+#endif
+
+/**
+ * \addtogroup asn1_module
+ * \{
+ */
+
+/**
+ * \name ASN1 Error codes
+ * These error codes are OR'ed to X509 error codes for
+ * higher error granularity.
+ * ASN1 is a standard to specify data structures.
+ * \{
+ */
+#define MBEDTLS_ERR_ASN1_OUT_OF_DATA -0x0060 /**< Out of data when parsing an ASN1 data structure. */
+#define MBEDTLS_ERR_ASN1_UNEXPECTED_TAG -0x0062 /**< ASN1 tag was of an unexpected value. */
+#define MBEDTLS_ERR_ASN1_INVALID_LENGTH -0x0064 /**< Error when trying to determine the length or invalid length. */
+#define MBEDTLS_ERR_ASN1_LENGTH_MISMATCH -0x0066 /**< Actual length differs from expected length. */
+#define MBEDTLS_ERR_ASN1_INVALID_DATA -0x0068 /**< Data is invalid. (not used) */
+#define MBEDTLS_ERR_ASN1_ALLOC_FAILED -0x006A /**< Memory allocation failed */
+#define MBEDTLS_ERR_ASN1_BUF_TOO_SMALL -0x006C /**< Buffer too small when writing ASN.1 data structure. */
+
+/* \} name */
+
+/**
+ * \name DER constants
+ * These constants comply with DER encoded the ANS1 type tags.
+ * DER encoding uses hexadecimal representation.
+ * An example DER sequence is:\n
+ * - 0x02 -- tag indicating INTEGER
+ * - 0x01 -- length in octets
+ * - 0x05 -- value
+ * Such sequences are typically read into \c ::mbedtls_x509_buf.
+ * \{
+ */
+#define MBEDTLS_ASN1_BOOLEAN 0x01
+#define MBEDTLS_ASN1_INTEGER 0x02
+#define MBEDTLS_ASN1_BIT_STRING 0x03
+#define MBEDTLS_ASN1_OCTET_STRING 0x04
+#define MBEDTLS_ASN1_NULL 0x05
+#define MBEDTLS_ASN1_OID 0x06
+#define MBEDTLS_ASN1_UTF8_STRING 0x0C
+#define MBEDTLS_ASN1_SEQUENCE 0x10
+#define MBEDTLS_ASN1_SET 0x11
+#define MBEDTLS_ASN1_PRINTABLE_STRING 0x13
+#define MBEDTLS_ASN1_T61_STRING 0x14
+#define MBEDTLS_ASN1_IA5_STRING 0x16
+#define MBEDTLS_ASN1_UTC_TIME 0x17
+#define MBEDTLS_ASN1_GENERALIZED_TIME 0x18
+#define MBEDTLS_ASN1_UNIVERSAL_STRING 0x1C
+#define MBEDTLS_ASN1_BMP_STRING 0x1E
+#define MBEDTLS_ASN1_PRIMITIVE 0x00
+#define MBEDTLS_ASN1_CONSTRUCTED 0x20
+#define MBEDTLS_ASN1_CONTEXT_SPECIFIC 0x80
+/* \} name */
+/* \} addtogroup asn1_module */
+
+/** Returns the size of the binary string, without the trailing \\0 */
+#define MBEDTLS_OID_SIZE(x) (sizeof(x) - 1)
+
+/**
+ * Compares an mbedtls_asn1_buf structure to a reference OID.
+ *
+ * Only works for 'defined' oid_str values (MBEDTLS_OID_HMAC_SHA1), you cannot use a
+ * 'unsigned char *oid' here!
+ */
+#define MBEDTLS_OID_CMP(oid_str, oid_buf) \
+ ( ( MBEDTLS_OID_SIZE(oid_str) != (oid_buf)->len ) || \
+ memcmp( (oid_str), (oid_buf)->p, (oid_buf)->len) != 0 )
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * \name Functions to parse ASN.1 data structures
+ * \{
+ */
+
+/**
+ * Type-length-value structure that allows for ASN1 using DER.
+ */
+typedef struct mbedtls_asn1_buf
+{
+ int tag; /**< ASN1 type, e.g. MBEDTLS_ASN1_UTF8_STRING. */
+ size_t len; /**< ASN1 length, in octets. */
+ unsigned char *p; /**< ASN1 data, e.g. in ASCII. */
+}
+mbedtls_asn1_buf;
+
+/**
+ * Container for ASN1 bit strings.
+ */
+typedef struct mbedtls_asn1_bitstring
+{
+ size_t len; /**< ASN1 length, in octets. */
+ unsigned char unused_bits; /**< Number of unused bits at the end of the string */
+ unsigned char *p; /**< Raw ASN1 data for the bit string */
+}
+mbedtls_asn1_bitstring;
+
+/**
+ * Container for a sequence of ASN.1 items
+ */
+typedef struct mbedtls_asn1_sequence
+{
+ mbedtls_asn1_buf buf; /**< Buffer containing the given ASN.1 item. */
+ struct mbedtls_asn1_sequence *next; /**< The next entry in the sequence. */
+}
+mbedtls_asn1_sequence;
+
+/**
+ * Container for a sequence or list of 'named' ASN.1 data items
+ */
+typedef struct mbedtls_asn1_named_data
+{
+ mbedtls_asn1_buf oid; /**< The object identifier. */
+ mbedtls_asn1_buf val; /**< The named value. */
+ struct mbedtls_asn1_named_data *next; /**< The next entry in the sequence. */
+ unsigned char next_merged; /**< Merge next item into the current one? */
+}
+mbedtls_asn1_named_data;
+
+/**
+ * \brief Get the length of an ASN.1 element.
+ * Updates the pointer to immediately behind the length.
+ *
+ * \param p The position in the ASN.1 data
+ * \param end End of data
+ * \param len The variable that will receive the value
+ *
+ * \return 0 if successful, MBEDTLS_ERR_ASN1_OUT_OF_DATA on reaching
+ * end of data, MBEDTLS_ERR_ASN1_INVALID_LENGTH if length is
+ * unparseable.
+ */
+int mbedtls_asn1_get_len( unsigned char **p,
+ const unsigned char *end,
+ size_t *len );
+
+/**
+ * \brief Get the tag and length of the tag. Check for the requested tag.
+ * Updates the pointer to immediately behind the tag and length.
+ *
+ * \param p The position in the ASN.1 data
+ * \param end End of data
+ * \param len The variable that will receive the length
+ * \param tag The expected tag
+ *
+ * \return 0 if successful, MBEDTLS_ERR_ASN1_UNEXPECTED_TAG if tag did
+ * not match requested tag, or another specific ASN.1 error code.
+ */
+int mbedtls_asn1_get_tag( unsigned char **p,
+ const unsigned char *end,
+ size_t *len, int tag );
+
+/**
+ * \brief Retrieve a boolean ASN.1 tag and its value.
+ * Updates the pointer to immediately behind the full tag.
+ *
+ * \param p The position in the ASN.1 data
+ * \param end End of data
+ * \param val The variable that will receive the value
+ *
+ * \return 0 if successful or a specific ASN.1 error code.
+ */
+int mbedtls_asn1_get_bool( unsigned char **p,
+ const unsigned char *end,
+ int *val );
+
+/**
+ * \brief Retrieve an integer ASN.1 tag and its value.
+ * Updates the pointer to immediately behind the full tag.
+ *
+ * \param p The position in the ASN.1 data
+ * \param end End of data
+ * \param val The variable that will receive the value
+ *
+ * \return 0 if successful or a specific ASN.1 error code.
+ */
+int mbedtls_asn1_get_int( unsigned char **p,
+ const unsigned char *end,
+ int *val );
+
+/**
+ * \brief Retrieve a bitstring ASN.1 tag and its value.
+ * Updates the pointer to immediately behind the full tag.
+ *
+ * \param p The position in the ASN.1 data
+ * \param end End of data
+ * \param bs The variable that will receive the value
+ *
+ * \return 0 if successful or a specific ASN.1 error code.
+ */
+int mbedtls_asn1_get_bitstring( unsigned char **p, const unsigned char *end,
+ mbedtls_asn1_bitstring *bs);
+
+/**
+ * \brief Retrieve a bitstring ASN.1 tag without unused bits and its
+ * value.
+ * Updates the pointer to the beginning of the bit/octet string.
+ *
+ * \param p The position in the ASN.1 data
+ * \param end End of data
+ * \param len Length of the actual bit/octect string in bytes
+ *
+ * \return 0 if successful or a specific ASN.1 error code.
+ */
+int mbedtls_asn1_get_bitstring_null( unsigned char **p, const unsigned char *end,
+ size_t *len );
+
+/**
+ * \brief Parses and splits an ASN.1 "SEQUENCE OF <tag>"
+ * Updated the pointer to immediately behind the full sequence tag.
+ *
+ * \param p The position in the ASN.1 data
+ * \param end End of data
+ * \param cur First variable in the chain to fill
+ * \param tag Type of sequence
+ *
+ * \return 0 if successful or a specific ASN.1 error code.
+ */
+int mbedtls_asn1_get_sequence_of( unsigned char **p,
+ const unsigned char *end,
+ mbedtls_asn1_sequence *cur,
+ int tag);
+
+#if defined(MBEDTLS_BIGNUM_C)
+/**
+ * \brief Retrieve a MPI value from an integer ASN.1 tag.
+ * Updates the pointer to immediately behind the full tag.
+ *
+ * \param p The position in the ASN.1 data
+ * \param end End of data
+ * \param X The MPI that will receive the value
+ *
+ * \return 0 if successful or a specific ASN.1 or MPI error code.
+ */
+int mbedtls_asn1_get_mpi( unsigned char **p,
+ const unsigned char *end,
+ mbedtls_mpi *X );
+#endif /* MBEDTLS_BIGNUM_C */
+
+/**
+ * \brief Retrieve an AlgorithmIdentifier ASN.1 sequence.
+ * Updates the pointer to immediately behind the full
+ * AlgorithmIdentifier.
+ *
+ * \param p The position in the ASN.1 data
+ * \param end End of data
+ * \param alg The buffer to receive the OID
+ * \param params The buffer to receive the params (if any)
+ *
+ * \return 0 if successful or a specific ASN.1 or MPI error code.
+ */
+int mbedtls_asn1_get_alg( unsigned char **p,
+ const unsigned char *end,
+ mbedtls_asn1_buf *alg, mbedtls_asn1_buf *params );
+
+/**
+ * \brief Retrieve an AlgorithmIdentifier ASN.1 sequence with NULL or no
+ * params.
+ * Updates the pointer to immediately behind the full
+ * AlgorithmIdentifier.
+ *
+ * \param p The position in the ASN.1 data
+ * \param end End of data
+ * \param alg The buffer to receive the OID
+ *
+ * \return 0 if successful or a specific ASN.1 or MPI error code.
+ */
+int mbedtls_asn1_get_alg_null( unsigned char **p,
+ const unsigned char *end,
+ mbedtls_asn1_buf *alg );
+
+/**
+ * \brief Find a specific named_data entry in a sequence or list based on
+ * the OID.
+ *
+ * \param list The list to seek through
+ * \param oid The OID to look for
+ * \param len Size of the OID
+ *
+ * \return NULL if not found, or a pointer to the existing entry.
+ */
+mbedtls_asn1_named_data *mbedtls_asn1_find_named_data( mbedtls_asn1_named_data *list,
+ const char *oid, size_t len );
+
+/**
+ * \brief Free a mbedtls_asn1_named_data entry
+ *
+ * \param entry The named data entry to free
+ */
+void mbedtls_asn1_free_named_data( mbedtls_asn1_named_data *entry );
+
+/**
+ * \brief Free all entries in a mbedtls_asn1_named_data list
+ * Head will be set to NULL
+ *
+ * \param head Pointer to the head of the list of named data entries to free
+ */
+void mbedtls_asn1_free_named_data_list( mbedtls_asn1_named_data **head );
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* asn1.h */
diff --git a/backport/compat/verification/mbedtls/bignum.h b/backport/compat/verification/mbedtls/bignum.h
new file mode 100644
index 00000000..69f8e2d9
--- /dev/null
+++ b/backport/compat/verification/mbedtls/bignum.h
@@ -0,0 +1,760 @@
+/**
+ * \file bignum.h
+ *
+ * \brief Multi-precision integer library
+ *
+ * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
+ * SPDX-License-Identifier: GPL-2.0
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * This file is part of mbed TLS (https://tls.mbed.org)
+ */
+#ifndef MBEDTLS_BIGNUM_H
+#define MBEDTLS_BIGNUM_H
+
+#if !defined(MBEDTLS_CONFIG_FILE)
+#include "config.h"
+#else
+#include MBEDTLS_CONFIG_FILE
+#endif
+
+#if defined(MBEDTLS_FS_IO)
+#include <stdio.h>
+#endif
+
+#define MBEDTLS_ERR_MPI_FILE_IO_ERROR -0x0002 /**< An error occurred while reading from or writing to a file. */
+#define MBEDTLS_ERR_MPI_BAD_INPUT_DATA -0x0004 /**< Bad input parameters to function. */
+#define MBEDTLS_ERR_MPI_INVALID_CHARACTER -0x0006 /**< There is an invalid character in the digit string. */
+#define MBEDTLS_ERR_MPI_BUFFER_TOO_SMALL -0x0008 /**< The buffer is too small to write to. */
+#define MBEDTLS_ERR_MPI_NEGATIVE_VALUE -0x000A /**< The input arguments are negative or result in illegal output. */
+#define MBEDTLS_ERR_MPI_DIVISION_BY_ZERO -0x000C /**< The input argument for division is zero, which is not allowed. */
+#define MBEDTLS_ERR_MPI_NOT_ACCEPTABLE -0x000E /**< The input arguments are not acceptable. */
+#define MBEDTLS_ERR_MPI_ALLOC_FAILED -0x0010 /**< Memory allocation failed. */
+
+#define MBEDTLS_MPI_CHK(f) do { if( ( ret = f ) != 0 ) goto cleanup; } while( 0 )
+
+/*
+ * Maximum size MPIs are allowed to grow to in number of limbs.
+ */
+#define MBEDTLS_MPI_MAX_LIMBS 10000
+
+#if !defined(MBEDTLS_MPI_WINDOW_SIZE)
+/*
+ * Maximum window size used for modular exponentiation. Default: 6
+ * Minimum value: 1. Maximum value: 6.
+ *
+ * Result is an array of ( 2 << MBEDTLS_MPI_WINDOW_SIZE ) MPIs used
+ * for the sliding window calculation. (So 64 by default)
+ *
+ * Reduction in size, reduces speed.
+ */
+#define MBEDTLS_MPI_WINDOW_SIZE 6 /**< Maximum windows size used. */
+#endif /* !MBEDTLS_MPI_WINDOW_SIZE */
+
+#if !defined(MBEDTLS_MPI_MAX_SIZE)
+/*
+ * Maximum size of MPIs allowed in bits and bytes for user-MPIs.
+ * ( Default: 512 bytes => 4096 bits, Maximum tested: 2048 bytes => 16384 bits )
+ *
+ * Note: Calculations can results temporarily in larger MPIs. So the number
+ * of limbs required (MBEDTLS_MPI_MAX_LIMBS) is higher.
+ */
+#define MBEDTLS_MPI_MAX_SIZE 1024 /**< Maximum number of bytes for usable MPIs. */
+#endif /* !MBEDTLS_MPI_MAX_SIZE */
+
+#define MBEDTLS_MPI_MAX_BITS ( 8 * MBEDTLS_MPI_MAX_SIZE ) /**< Maximum number of bits for usable MPIs. */
+
+/*
+ * When reading from files with mbedtls_mpi_read_file() and writing to files with
+ * mbedtls_mpi_write_file() the buffer should have space
+ * for a (short) label, the MPI (in the provided radix), the newline
+ * characters and the '\0'.
+ *
+ * By default we assume at least a 10 char label, a minimum radix of 10
+ * (decimal) and a maximum of 4096 bit numbers (1234 decimal chars).
+ * Autosized at compile time for at least a 10 char label, a minimum radix
+ * of 10 (decimal) for a number of MBEDTLS_MPI_MAX_BITS size.
+ *
+ * This used to be statically sized to 1250 for a maximum of 4096 bit
+ * numbers (1234 decimal chars).
+ *
+ * Calculate using the formula:
+ * MBEDTLS_MPI_RW_BUFFER_SIZE = ceil(MBEDTLS_MPI_MAX_BITS / ln(10) * ln(2)) +
+ * LabelSize + 6
+ */
+#define MBEDTLS_MPI_MAX_BITS_SCALE100 ( 100 * MBEDTLS_MPI_MAX_BITS )
+#define MBEDTLS_LN_2_DIV_LN_10_SCALE100 332
+#define MBEDTLS_MPI_RW_BUFFER_SIZE ( ((MBEDTLS_MPI_MAX_BITS_SCALE100 + MBEDTLS_LN_2_DIV_LN_10_SCALE100 - 1) / MBEDTLS_LN_2_DIV_LN_10_SCALE100) + 10 + 6 )
+
+/*
+ * Define the base integer type, architecture-wise.
+ *
+ * 32 or 64-bit integer types can be forced regardless of the underlying
+ * architecture by defining MBEDTLS_HAVE_INT32 or MBEDTLS_HAVE_INT64
+ * respectively and undefining MBEDTLS_HAVE_ASM.
+ *
+ * Double-width integers (e.g. 128-bit in 64-bit architectures) can be
+ * disabled by defining MBEDTLS_NO_UDBL_DIVISION.
+ */
+#if !defined(MBEDTLS_HAVE_INT32)
+ #if defined(_MSC_VER) && defined(_M_AMD64)
+ /* Always choose 64-bit when using MSC */
+ #if !defined(MBEDTLS_HAVE_INT64)
+ #define MBEDTLS_HAVE_INT64
+ #endif /* !MBEDTLS_HAVE_INT64 */
+ typedef int64_t mbedtls_mpi_sint;
+ typedef uint64_t mbedtls_mpi_uint;
+ #elif defined(__GNUC__) && ( \
+ defined(__amd64__) || defined(__x86_64__) || \
+ defined(__ppc64__) || defined(__powerpc64__) || \
+ defined(__ia64__) || defined(__alpha__) || \
+ ( defined(__sparc__) && defined(__arch64__) ) || \
+ defined(__s390x__) || defined(__mips64) )
+ #if !defined(MBEDTLS_HAVE_INT64)
+ #define MBEDTLS_HAVE_INT64
+ #endif /* MBEDTLS_HAVE_INT64 */
+ typedef int64_t mbedtls_mpi_sint;
+ typedef uint64_t mbedtls_mpi_uint;
+ #if !defined(MBEDTLS_NO_UDBL_DIVISION)
+ /* mbedtls_t_udbl defined as 128-bit unsigned int */
+ typedef unsigned int mbedtls_t_udbl __attribute__((mode(TI)));
+ #define MBEDTLS_HAVE_UDBL
+ #endif /* !MBEDTLS_NO_UDBL_DIVISION */
+ #elif defined(__ARMCC_VERSION) && defined(__aarch64__)
+ /*
+ * __ARMCC_VERSION is defined for both armcc and armclang and
+ * __aarch64__ is only defined by armclang when compiling 64-bit code
+ */
+ #if !defined(MBEDTLS_HAVE_INT64)
+ #define MBEDTLS_HAVE_INT64
+ #endif /* !MBEDTLS_HAVE_INT64 */
+ typedef int64_t mbedtls_mpi_sint;
+ typedef uint64_t mbedtls_mpi_uint;
+ #if !defined(MBEDTLS_NO_UDBL_DIVISION)
+ /* mbedtls_t_udbl defined as 128-bit unsigned int */
+ typedef __uint128_t mbedtls_t_udbl;
+ #define MBEDTLS_HAVE_UDBL
+ #endif /* !MBEDTLS_NO_UDBL_DIVISION */
+ #elif defined(MBEDTLS_HAVE_INT64)
+ /* Force 64-bit integers with unknown compiler */
+ typedef int64_t mbedtls_mpi_sint;
+ typedef uint64_t mbedtls_mpi_uint;
+ #endif
+#endif /* !MBEDTLS_HAVE_INT32 */
+
+#if !defined(MBEDTLS_HAVE_INT64)
+ /* Default to 32-bit compilation */
+ #if !defined(MBEDTLS_HAVE_INT32)
+ #define MBEDTLS_HAVE_INT32
+ #endif /* !MBEDTLS_HAVE_INT32 */
+ typedef int32_t mbedtls_mpi_sint;
+ typedef uint32_t mbedtls_mpi_uint;
+ #if !defined(MBEDTLS_NO_UDBL_DIVISION)
+ typedef uint64_t mbedtls_t_udbl;
+ #define MBEDTLS_HAVE_UDBL
+ #endif /* !MBEDTLS_NO_UDBL_DIVISION */
+#endif /* !MBEDTLS_HAVE_INT64 */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * \brief MPI structure
+ */
+typedef struct
+{
+ int s; /*!< integer sign */
+ size_t n; /*!< total # of limbs */
+ mbedtls_mpi_uint *p; /*!< pointer to limbs */
+}
+mbedtls_mpi;
+
+/**
+ * \brief Initialize one MPI (make internal references valid)
+ * This just makes it ready to be set or freed,
+ * but does not define a value for the MPI.
+ *
+ * \param X One MPI to initialize.
+ */
+void mbedtls_mpi_init( mbedtls_mpi *X );
+
+/**
+ * \brief Unallocate one MPI
+ *
+ * \param X One MPI to unallocate.
+ */
+void mbedtls_mpi_free( mbedtls_mpi *X );
+
+/**
+ * \brief Enlarge to the specified number of limbs
+ *
+ * \param X MPI to grow
+ * \param nblimbs The target number of limbs
+ *
+ * \return 0 if successful,
+ * MBEDTLS_ERR_MPI_ALLOC_FAILED if memory allocation failed
+ */
+int mbedtls_mpi_grow( mbedtls_mpi *X, size_t nblimbs );
+
+/**
+ * \brief Resize down, keeping at least the specified number of limbs
+ *
+ * \param X MPI to shrink
+ * \param nblimbs The minimum number of limbs to keep
+ *
+ * \return 0 if successful,
+ * MBEDTLS_ERR_MPI_ALLOC_FAILED if memory allocation failed
+ */
+int mbedtls_mpi_shrink( mbedtls_mpi *X, size_t nblimbs );
+
+/**
+ * \brief Copy the contents of Y into X
+ *
+ * \param X Destination MPI
+ * \param Y Source MPI
+ *
+ * \return 0 if successful,
+ * MBEDTLS_ERR_MPI_ALLOC_FAILED if memory allocation failed
+ */
+int mbedtls_mpi_copy( mbedtls_mpi *X, const mbedtls_mpi *Y );
+
+/**
+ * \brief Swap the contents of X and Y
+ *
+ * \param X First MPI value
+ * \param Y Second MPI value
+ */
+void mbedtls_mpi_swap( mbedtls_mpi *X, mbedtls_mpi *Y );
+
+/**
+ * \brief Safe conditional assignement X = Y if assign is 1
+ *
+ * \param X MPI to conditionally assign to
+ * \param Y Value to be assigned
+ * \param assign 1: perform the assignment, 0: keep X's original value
+ *
+ * \return 0 if successful,
+ * MBEDTLS_ERR_MPI_ALLOC_FAILED if memory allocation failed,
+ *
+ * \note This function is equivalent to
+ * if( assign ) mbedtls_mpi_copy( X, Y );
+ * except that it avoids leaking any information about whether
+ * the assignment was done or not (the above code may leak
+ * information through branch prediction and/or memory access
+ * patterns analysis).
+ */
+int mbedtls_mpi_safe_cond_assign( mbedtls_mpi *X, const mbedtls_mpi *Y, unsigned char assign );
+
+/**
+ * \brief Safe conditional swap X <-> Y if swap is 1
+ *
+ * \param X First mbedtls_mpi value
+ * \param Y Second mbedtls_mpi value
+ * \param assign 1: perform the swap, 0: keep X and Y's original values
+ *
+ * \return 0 if successful,
+ * MBEDTLS_ERR_MPI_ALLOC_FAILED if memory allocation failed,
+ *
+ * \note This function is equivalent to
+ * if( assign ) mbedtls_mpi_swap( X, Y );
+ * except that it avoids leaking any information about whether
+ * the assignment was done or not (the above code may leak
+ * information through branch prediction and/or memory access
+ * patterns analysis).
+ */
+int mbedtls_mpi_safe_cond_swap( mbedtls_mpi *X, mbedtls_mpi *Y, unsigned char assign );
+
+/**
+ * \brief Set value from integer
+ *
+ * \param X MPI to set
+ * \param z Value to use
+ *
+ * \return 0 if successful,
+ * MBEDTLS_ERR_MPI_ALLOC_FAILED if memory allocation failed
+ */
+int mbedtls_mpi_lset( mbedtls_mpi *X, mbedtls_mpi_sint z );
+
+/**
+ * \brief Get a specific bit from X
+ *
+ * \param X MPI to use
+ * \param pos Zero-based index of the bit in X
+ *
+ * \return Either a 0 or a 1
+ */
+int mbedtls_mpi_get_bit( const mbedtls_mpi *X, size_t pos );
+
+/**
+ * \brief Set a bit of X to a specific value of 0 or 1
+ *
+ * \note Will grow X if necessary to set a bit to 1 in a not yet
+ * existing limb. Will not grow if bit should be set to 0
+ *
+ * \param X MPI to use
+ * \param pos Zero-based index of the bit in X
+ * \param val The value to set the bit to (0 or 1)
+ *
+ * \return 0 if successful,
+ * MBEDTLS_ERR_MPI_ALLOC_FAILED if memory allocation failed,
+ * MBEDTLS_ERR_MPI_BAD_INPUT_DATA if val is not 0 or 1
+ */
+int mbedtls_mpi_set_bit( mbedtls_mpi *X, size_t pos, unsigned char val );
+
+/**
+ * \brief Return the number of zero-bits before the least significant
+ * '1' bit
+ *
+ * Note: Thus also the zero-based index of the least significant '1' bit
+ *
+ * \param X MPI to use
+ */
+size_t mbedtls_mpi_lsb( const mbedtls_mpi *X );
+
+/**
+ * \brief Return the number of bits up to and including the most
+ * significant '1' bit'
+ *
+ * Note: Thus also the one-based index of the most significant '1' bit
+ *
+ * \param X MPI to use
+ */
+size_t mbedtls_mpi_bitlen( const mbedtls_mpi *X );
+
+/**
+ * \brief Return the total size in bytes
+ *
+ * \param X MPI to use
+ */
+size_t mbedtls_mpi_size( const mbedtls_mpi *X );
+
+/**
+ * \brief Import from an ASCII string
+ *
+ * \param X Destination MPI
+ * \param radix Input numeric base
+ * \param s Null-terminated string buffer
+ *
+ * \return 0 if successful, or a MBEDTLS_ERR_MPI_XXX error code
+ */
+int mbedtls_mpi_read_string( mbedtls_mpi *X, int radix, const char *s );
+
+/**
+ * \brief Export into an ASCII string
+ *
+ * \param X Source MPI
+ * \param radix Output numeric base
+ * \param buf Buffer to write the string to
+ * \param buflen Length of buf
+ * \param olen Length of the string written, including final NUL byte
+ *
+ * \return 0 if successful, or a MBEDTLS_ERR_MPI_XXX error code.
+ * *olen is always updated to reflect the amount
+ * of data that has (or would have) been written.
+ *
+ * \note Call this function with buflen = 0 to obtain the
+ * minimum required buffer size in *olen.
+ */
+int mbedtls_mpi_write_string( const mbedtls_mpi *X, int radix,
+ char *buf, size_t buflen, size_t *olen );
+
+#if defined(MBEDTLS_FS_IO)
+/**
+ * \brief Read MPI from a line in an opened file
+ *
+ * \param X Destination MPI
+ * \param radix Input numeric base
+ * \param fin Input file handle
+ *
+ * \return 0 if successful, MBEDTLS_ERR_MPI_BUFFER_TOO_SMALL if
+ * the file read buffer is too small or a
+ * MBEDTLS_ERR_MPI_XXX error code
+ *
+ * \note On success, this function advances the file stream
+ * to the end of the current line or to EOF.
+ *
+ * The function returns 0 on an empty line.
+ *
+ * Leading whitespaces are ignored, as is a
+ * '0x' prefix for radix 16.
+ *
+ */
+int mbedtls_mpi_read_file( mbedtls_mpi *X, int radix, FILE *fin );
+
+/**
+ * \brief Write X into an opened file, or stdout if fout is NULL
+ *
+ * \param p Prefix, can be NULL
+ * \param X Source MPI
+ * \param radix Output numeric base
+ * \param fout Output file handle (can be NULL)
+ *
+ * \return 0 if successful, or a MBEDTLS_ERR_MPI_XXX error code
+ *
+ * \note Set fout == NULL to print X on the console.
+ */
+int mbedtls_mpi_write_file( const char *p, const mbedtls_mpi *X, int radix, FILE *fout );
+#endif /* MBEDTLS_FS_IO */
+
+/**
+ * \brief Import X from unsigned binary data, big endian
+ *
+ * \param X Destination MPI
+ * \param buf Input buffer
+ * \param buflen Input buffer size
+ *
+ * \return 0 if successful,
+ * MBEDTLS_ERR_MPI_ALLOC_FAILED if memory allocation failed
+ */
+int mbedtls_mpi_read_binary( mbedtls_mpi *X, const unsigned char *buf, size_t buflen );
+
+/**
+ * \brief Export X into unsigned binary data, big endian.
+ * Always fills the whole buffer, which will start with zeros
+ * if the number is smaller.
+ *
+ * \param X Source MPI
+ * \param buf Output buffer
+ * \param buflen Output buffer size
+ *
+ * \return 0 if successful,
+ * MBEDTLS_ERR_MPI_BUFFER_TOO_SMALL if buf isn't large enough
+ */
+int mbedtls_mpi_write_binary( const mbedtls_mpi *X, unsigned char *buf, size_t buflen );
+
+/**
+ * \brief Left-shift: X <<= count
+ *
+ * \param X MPI to shift
+ * \param count Amount to shift
+ *
+ * \return 0 if successful,
+ * MBEDTLS_ERR_MPI_ALLOC_FAILED if memory allocation failed
+ */
+int mbedtls_mpi_shift_l( mbedtls_mpi *X, size_t count );
+
+/**
+ * \brief Right-shift: X >>= count
+ *
+ * \param X MPI to shift
+ * \param count Amount to shift
+ *
+ * \return 0 if successful,
+ * MBEDTLS_ERR_MPI_ALLOC_FAILED if memory allocation failed
+ */
+int mbedtls_mpi_shift_r( mbedtls_mpi *X, size_t count );
+
+/**
+ * \brief Compare unsigned values
+ *
+ * \param X Left-hand MPI
+ * \param Y Right-hand MPI
+ *
+ * \return 1 if |X| is greater than |Y|,
+ * -1 if |X| is lesser than |Y| or
+ * 0 if |X| is equal to |Y|
+ */
+int mbedtls_mpi_cmp_abs( const mbedtls_mpi *X, const mbedtls_mpi *Y );
+
+/**
+ * \brief Compare signed values
+ *
+ * \param X Left-hand MPI
+ * \param Y Right-hand MPI
+ *
+ * \return 1 if X is greater than Y,
+ * -1 if X is lesser than Y or
+ * 0 if X is equal to Y
+ */
+int mbedtls_mpi_cmp_mpi( const mbedtls_mpi *X, const mbedtls_mpi *Y );
+
+/**
+ * \brief Compare signed values
+ *
+ * \param X Left-hand MPI
+ * \param z The integer value to compare to
+ *
+ * \return 1 if X is greater than z,
+ * -1 if X is lesser than z or
+ * 0 if X is equal to z
+ */
+int mbedtls_mpi_cmp_int( const mbedtls_mpi *X, mbedtls_mpi_sint z );
+
+/**
+ * \brief Unsigned addition: X = |A| + |B|
+ *
+ * \param X Destination MPI
+ * \param A Left-hand MPI
+ * \param B Right-hand MPI
+ *
+ * \return 0 if successful,
+ * MBEDTLS_ERR_MPI_ALLOC_FAILED if memory allocation failed
+ */
+int mbedtls_mpi_add_abs( mbedtls_mpi *X, const mbedtls_mpi *A, const mbedtls_mpi *B );
+
+/**
+ * \brief Unsigned subtraction: X = |A| - |B|
+ *
+ * \param X Destination MPI
+ * \param A Left-hand MPI
+ * \param B Right-hand MPI
+ *
+ * \return 0 if successful,
+ * MBEDTLS_ERR_MPI_NEGATIVE_VALUE if B is greater than A
+ */
+int mbedtls_mpi_sub_abs( mbedtls_mpi *X, const mbedtls_mpi *A, const mbedtls_mpi *B );
+
+/**
+ * \brief Signed addition: X = A + B
+ *
+ * \param X Destination MPI
+ * \param A Left-hand MPI
+ * \param B Right-hand MPI
+ *
+ * \return 0 if successful,
+ * MBEDTLS_ERR_MPI_ALLOC_FAILED if memory allocation failed
+ */
+int mbedtls_mpi_add_mpi( mbedtls_mpi *X, const mbedtls_mpi *A, const mbedtls_mpi *B );
+
+/**
+ * \brief Signed subtraction: X = A - B
+ *
+ * \param X Destination MPI
+ * \param A Left-hand MPI
+ * \param B Right-hand MPI
+ *
+ * \return 0 if successful,
+ * MBEDTLS_ERR_MPI_ALLOC_FAILED if memory allocation failed
+ */
+int mbedtls_mpi_sub_mpi( mbedtls_mpi *X, const mbedtls_mpi *A, const mbedtls_mpi *B );
+
+/**
+ * \brief Signed addition: X = A + b
+ *
+ * \param X Destination MPI
+ * \param A Left-hand MPI
+ * \param b The integer value to add
+ *
+ * \return 0 if successful,
+ * MBEDTLS_ERR_MPI_ALLOC_FAILED if memory allocation failed
+ */
+int mbedtls_mpi_add_int( mbedtls_mpi *X, const mbedtls_mpi *A, mbedtls_mpi_sint b );
+
+/**
+ * \brief Signed subtraction: X = A - b
+ *
+ * \param X Destination MPI
+ * \param A Left-hand MPI
+ * \param b The integer value to subtract
+ *
+ * \return 0 if successful,
+ * MBEDTLS_ERR_MPI_ALLOC_FAILED if memory allocation failed
+ */
+int mbedtls_mpi_sub_int( mbedtls_mpi *X, const mbedtls_mpi *A, mbedtls_mpi_sint b );
+
+/**
+ * \brief Baseline multiplication: X = A * B
+ *
+ * \param X Destination MPI
+ * \param A Left-hand MPI
+ * \param B Right-hand MPI
+ *
+ * \return 0 if successful,
+ * MBEDTLS_ERR_MPI_ALLOC_FAILED if memory allocation failed
+ */
+int mbedtls_mpi_mul_mpi( mbedtls_mpi *X, const mbedtls_mpi *A, const mbedtls_mpi *B );
+
+/**
+ * \brief Baseline multiplication: X = A * b
+ *
+ * \param X Destination MPI
+ * \param A Left-hand MPI
+ * \param b The unsigned integer value to multiply with
+ *
+ * \note b is unsigned
+ *
+ * \return 0 if successful,
+ * MBEDTLS_ERR_MPI_ALLOC_FAILED if memory allocation failed
+ */
+int mbedtls_mpi_mul_int( mbedtls_mpi *X, const mbedtls_mpi *A, mbedtls_mpi_uint b );
+
+/**
+ * \brief Division by mbedtls_mpi: A = Q * B + R
+ *
+ * \param Q Destination MPI for the quotient
+ * \param R Destination MPI for the rest value
+ * \param A Left-hand MPI
+ * \param B Right-hand MPI
+ *
+ * \return 0 if successful,
+ * MBEDTLS_ERR_MPI_ALLOC_FAILED if memory allocation failed,
+ * MBEDTLS_ERR_MPI_DIVISION_BY_ZERO if B == 0
+ *
+ * \note Either Q or R can be NULL.
+ */
+int mbedtls_mpi_div_mpi( mbedtls_mpi *Q, mbedtls_mpi *R, const mbedtls_mpi *A, const mbedtls_mpi *B );
+
+/**
+ * \brief Division by int: A = Q * b + R
+ *
+ * \param Q Destination MPI for the quotient
+ * \param R Destination MPI for the rest value
+ * \param A Left-hand MPI
+ * \param b Integer to divide by
+ *
+ * \return 0 if successful,
+ * MBEDTLS_ERR_MPI_ALLOC_FAILED if memory allocation failed,
+ * MBEDTLS_ERR_MPI_DIVISION_BY_ZERO if b == 0
+ *
+ * \note Either Q or R can be NULL.
+ */
+int mbedtls_mpi_div_int( mbedtls_mpi *Q, mbedtls_mpi *R, const mbedtls_mpi *A, mbedtls_mpi_sint b );
+
+/**
+ * \brief Modulo: R = A mod B
+ *
+ * \param R Destination MPI for the rest value
+ * \param A Left-hand MPI
+ * \param B Right-hand MPI
+ *
+ * \return 0 if successful,
+ * MBEDTLS_ERR_MPI_ALLOC_FAILED if memory allocation failed,
+ * MBEDTLS_ERR_MPI_DIVISION_BY_ZERO if B == 0,
+ * MBEDTLS_ERR_MPI_NEGATIVE_VALUE if B < 0
+ */
+int mbedtls_mpi_mod_mpi( mbedtls_mpi *R, const mbedtls_mpi *A, const mbedtls_mpi *B );
+
+/**
+ * \brief Modulo: r = A mod b
+ *
+ * \param r Destination mbedtls_mpi_uint
+ * \param A Left-hand MPI
+ * \param b Integer to divide by
+ *
+ * \return 0 if successful,
+ * MBEDTLS_ERR_MPI_ALLOC_FAILED if memory allocation failed,
+ * MBEDTLS_ERR_MPI_DIVISION_BY_ZERO if b == 0,
+ * MBEDTLS_ERR_MPI_NEGATIVE_VALUE if b < 0
+ */
+int mbedtls_mpi_mod_int( mbedtls_mpi_uint *r, const mbedtls_mpi *A, mbedtls_mpi_sint b );
+
+/**
+ * \brief Sliding-window exponentiation: X = A^E mod N
+ *
+ * \param X Destination MPI
+ * \param A Left-hand MPI
+ * \param E Exponent MPI
+ * \param N Modular MPI
+ * \param _RR Speed-up MPI used for recalculations
+ *
+ * \return 0 if successful,
+ * MBEDTLS_ERR_MPI_ALLOC_FAILED if memory allocation failed,
+ * MBEDTLS_ERR_MPI_BAD_INPUT_DATA if N is negative or even or
+ * if E is negative
+ *
+ * \note _RR is used to avoid re-computing R*R mod N across
+ * multiple calls, which speeds up things a bit. It can
+ * be set to NULL if the extra performance is unneeded.
+ */
+int mbedtls_mpi_exp_mod( mbedtls_mpi *X, const mbedtls_mpi *A, const mbedtls_mpi *E, const mbedtls_mpi *N, mbedtls_mpi *_RR );
+
+/**
+ * \brief Fill an MPI X with size bytes of random
+ *
+ * \param X Destination MPI
+ * \param size Size in bytes
+ * \param f_rng RNG function
+ * \param p_rng RNG parameter
+ *
+ * \return 0 if successful,
+ * MBEDTLS_ERR_MPI_ALLOC_FAILED if memory allocation failed
+ */
+int mbedtls_mpi_fill_random( mbedtls_mpi *X, size_t size,
+ int (*f_rng)(void *, unsigned char *, size_t),
+ void *p_rng );
+
+/**
+ * \brief Greatest common divisor: G = gcd(A, B)
+ *
+ * \param G Destination MPI
+ * \param A Left-hand MPI
+ * \param B Right-hand MPI
+ *
+ * \return 0 if successful,
+ * MBEDTLS_ERR_MPI_ALLOC_FAILED if memory allocation failed
+ */
+int mbedtls_mpi_gcd( mbedtls_mpi *G, const mbedtls_mpi *A, const mbedtls_mpi *B );
+
+/**
+ * \brief Modular inverse: X = A^-1 mod N
+ *
+ * \param X Destination MPI
+ * \param A Left-hand MPI
+ * \param N Right-hand MPI
+ *
+ * \return 0 if successful,
+ * MBEDTLS_ERR_MPI_ALLOC_FAILED if memory allocation failed,
+ * MBEDTLS_ERR_MPI_BAD_INPUT_DATA if N is <= 1,
+ MBEDTLS_ERR_MPI_NOT_ACCEPTABLE if A has no inverse mod N.
+ */
+int mbedtls_mpi_inv_mod( mbedtls_mpi *X, const mbedtls_mpi *A, const mbedtls_mpi *N );
+
+/**
+ * \brief Miller-Rabin primality test
+ *
+ * \param X MPI to check
+ * \param f_rng RNG function
+ * \param p_rng RNG parameter
+ *
+ * \return 0 if successful (probably prime),
+ * MBEDTLS_ERR_MPI_ALLOC_FAILED if memory allocation failed,
+ * MBEDTLS_ERR_MPI_NOT_ACCEPTABLE if X is not prime
+ */
+int mbedtls_mpi_is_prime( const mbedtls_mpi *X,
+ int (*f_rng)(void *, unsigned char *, size_t),
+ void *p_rng );
+
+/**
+ * \brief Prime number generation
+ *
+ * \param X Destination MPI
+ * \param nbits Required size of X in bits
+ * ( 3 <= nbits <= MBEDTLS_MPI_MAX_BITS )
+ * \param dh_flag If 1, then (X-1)/2 will be prime too
+ * \param f_rng RNG function
+ * \param p_rng RNG parameter
+ *
+ * \return 0 if successful (probably prime),
+ * MBEDTLS_ERR_MPI_ALLOC_FAILED if memory allocation failed,
+ * MBEDTLS_ERR_MPI_BAD_INPUT_DATA if nbits is < 3
+ */
+int mbedtls_mpi_gen_prime( mbedtls_mpi *X, size_t nbits, int dh_flag,
+ int (*f_rng)(void *, unsigned char *, size_t),
+ void *p_rng );
+
+/**
+ * \brief Checkup routine
+ *
+ * \return 0 if successful, or 1 if the test failed
+ */
+int mbedtls_mpi_self_test( int verbose );
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* bignum.h */
diff --git a/backport/compat/verification/mbedtls/bn_mul.h b/backport/compat/verification/mbedtls/bn_mul.h
new file mode 100644
index 00000000..5f59ec64
--- /dev/null
+++ b/backport/compat/verification/mbedtls/bn_mul.h
@@ -0,0 +1,887 @@
+/**
+ * \file bn_mul.h
+ *
+ * \brief Multi-precision integer library
+ *
+ * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
+ * SPDX-License-Identifier: GPL-2.0
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * This file is part of mbed TLS (https://tls.mbed.org)
+ */
+/*
+ * Multiply source vector [s] with b, add result
+ * to destination vector [d] and set carry c.
+ *
+ * Currently supports:
+ *
+ * . IA-32 (386+) . AMD64 / EM64T
+ * . IA-32 (SSE2) . Motorola 68000
+ * . PowerPC, 32-bit . MicroBlaze
+ * . PowerPC, 64-bit . TriCore
+ * . SPARC v8 . ARM v3+
+ * . Alpha . MIPS32
+ * . C, longlong . C, generic
+ */
+#ifndef MBEDTLS_BN_MUL_H
+#define MBEDTLS_BN_MUL_H
+
+#include "bignum.h"
+
+#if defined(MBEDTLS_HAVE_ASM)
+
+#ifndef asm
+#define asm __asm
+#endif
+
+/* armcc5 --gnu defines __GNUC__ but doesn't support GNU's extended asm */
+#if defined(__GNUC__) && \
+ ( !defined(__ARMCC_VERSION) || __ARMCC_VERSION >= 6000000 )
+#if defined(__i386__)
+
+#define MULADDC_INIT \
+ asm( \
+ "movl %%ebx, %0 \n\t" \
+ "movl %5, %%esi \n\t" \
+ "movl %6, %%edi \n\t" \
+ "movl %7, %%ecx \n\t" \
+ "movl %8, %%ebx \n\t"
+
+#define MULADDC_CORE \
+ "lodsl \n\t" \
+ "mull %%ebx \n\t" \
+ "addl %%ecx, %%eax \n\t" \
+ "adcl $0, %%edx \n\t" \
+ "addl (%%edi), %%eax \n\t" \
+ "adcl $0, %%edx \n\t" \
+ "movl %%edx, %%ecx \n\t" \
+ "stosl \n\t"
+
+#if defined(MBEDTLS_HAVE_SSE2)
+
+#define MULADDC_HUIT \
+ "movd %%ecx, %%mm1 \n\t" \
+ "movd %%ebx, %%mm0 \n\t" \
+ "movd (%%edi), %%mm3 \n\t" \
+ "paddq %%mm3, %%mm1 \n\t" \
+ "movd (%%esi), %%mm2 \n\t" \
+ "pmuludq %%mm0, %%mm2 \n\t" \
+ "movd 4(%%esi), %%mm4 \n\t" \
+ "pmuludq %%mm0, %%mm4 \n\t" \
+ "movd 8(%%esi), %%mm6 \n\t" \
+ "pmuludq %%mm0, %%mm6 \n\t" \
+ "movd 12(%%esi), %%mm7 \n\t" \
+ "pmuludq %%mm0, %%mm7 \n\t" \
+ "paddq %%mm2, %%mm1 \n\t" \
+ "movd 4(%%edi), %%mm3 \n\t" \
+ "paddq %%mm4, %%mm3 \n\t" \
+ "movd 8(%%edi), %%mm5 \n\t" \
+ "paddq %%mm6, %%mm5 \n\t" \
+ "movd 12(%%edi), %%mm4 \n\t" \
+ "paddq %%mm4, %%mm7 \n\t" \
+ "movd %%mm1, (%%edi) \n\t" \
+ "movd 16(%%esi), %%mm2 \n\t" \
+ "pmuludq %%mm0, %%mm2 \n\t" \
+ "psrlq $32, %%mm1 \n\t" \
+ "movd 20(%%esi), %%mm4 \n\t" \
+ "pmuludq %%mm0, %%mm4 \n\t" \
+ "paddq %%mm3, %%mm1 \n\t" \
+ "movd 24(%%esi), %%mm6 \n\t" \
+ "pmuludq %%mm0, %%mm6 \n\t" \
+ "movd %%mm1, 4(%%edi) \n\t" \
+ "psrlq $32, %%mm1 \n\t" \
+ "movd 28(%%esi), %%mm3 \n\t" \
+ "pmuludq %%mm0, %%mm3 \n\t" \
+ "paddq %%mm5, %%mm1 \n\t" \
+ "movd 16(%%edi), %%mm5 \n\t" \
+ "paddq %%mm5, %%mm2 \n\t" \
+ "movd %%mm1, 8(%%edi) \n\t" \
+ "psrlq $32, %%mm1 \n\t" \
+ "paddq %%mm7, %%mm1 \n\t" \
+ "movd 20(%%edi), %%mm5 \n\t" \
+ "paddq %%mm5, %%mm4 \n\t" \
+ "movd %%mm1, 12(%%edi) \n\t" \
+ "psrlq $32, %%mm1 \n\t" \
+ "paddq %%mm2, %%mm1 \n\t" \
+ "movd 24(%%edi), %%mm5 \n\t" \
+ "paddq %%mm5, %%mm6 \n\t" \
+ "movd %%mm1, 16(%%edi) \n\t" \
+ "psrlq $32, %%mm1 \n\t" \
+ "paddq %%mm4, %%mm1 \n\t" \
+ "movd 28(%%edi), %%mm5 \n\t" \
+ "paddq %%mm5, %%mm3 \n\t" \
+ "movd %%mm1, 20(%%edi) \n\t" \
+ "psrlq $32, %%mm1 \n\t" \
+ "paddq %%mm6, %%mm1 \n\t" \
+ "movd %%mm1, 24(%%edi) \n\t" \
+ "psrlq $32, %%mm1 \n\t" \
+ "paddq %%mm3, %%mm1 \n\t" \
+ "movd %%mm1, 28(%%edi) \n\t" \
+ "addl $32, %%edi \n\t" \
+ "addl $32, %%esi \n\t" \
+ "psrlq $32, %%mm1 \n\t" \
+ "movd %%mm1, %%ecx \n\t"
+
+#define MULADDC_STOP \
+ "emms \n\t" \
+ "movl %4, %%ebx \n\t" \
+ "movl %%ecx, %1 \n\t" \
+ "movl %%edi, %2 \n\t" \
+ "movl %%esi, %3 \n\t" \
+ : "=m" (t), "=m" (c), "=m" (d), "=m" (s) \
+ : "m" (t), "m" (s), "m" (d), "m" (c), "m" (b) \
+ : "eax", "ecx", "edx", "esi", "edi" \
+ );
+
+#else
+
+#define MULADDC_STOP \
+ "movl %4, %%ebx \n\t" \
+ "movl %%ecx, %1 \n\t" \
+ "movl %%edi, %2 \n\t" \
+ "movl %%esi, %3 \n\t" \
+ : "=m" (t), "=m" (c), "=m" (d), "=m" (s) \
+ : "m" (t), "m" (s), "m" (d), "m" (c), "m" (b) \
+ : "eax", "ecx", "edx", "esi", "edi" \
+ );
+#endif /* SSE2 */
+#endif /* i386 */
+
+#if defined(__amd64__) || defined (__x86_64__)
+
+#define MULADDC_INIT \
+ asm( \
+ "xorq %%r8, %%r8 \n\t"
+
+#define MULADDC_CORE \
+ "movq (%%rsi), %%rax \n\t" \
+ "mulq %%rbx \n\t" \
+ "addq $8, %%rsi \n\t" \
+ "addq %%rcx, %%rax \n\t" \
+ "movq %%r8, %%rcx \n\t" \
+ "adcq $0, %%rdx \n\t" \
+ "nop \n\t" \
+ "addq %%rax, (%%rdi) \n\t" \
+ "adcq %%rdx, %%rcx \n\t" \
+ "addq $8, %%rdi \n\t"
+
+#define MULADDC_STOP \
+ : "+c" (c), "+D" (d), "+S" (s) \
+ : "b" (b) \
+ : "rax", "rdx", "r8" \
+ );
+
+#endif /* AMD64 */
+
+#if defined(__mc68020__) || defined(__mcpu32__)
+
+#define MULADDC_INIT \
+ asm( \
+ "movl %3, %%a2 \n\t" \
+ "movl %4, %%a3 \n\t" \
+ "movl %5, %%d3 \n\t" \
+ "movl %6, %%d2 \n\t" \
+ "moveq #0, %%d0 \n\t"
+
+#define MULADDC_CORE \
+ "movel %%a2@+, %%d1 \n\t" \
+ "mulul %%d2, %%d4:%%d1 \n\t" \
+ "addl %%d3, %%d1 \n\t" \
+ "addxl %%d0, %%d4 \n\t" \
+ "moveq #0, %%d3 \n\t" \
+ "addl %%d1, %%a3@+ \n\t" \
+ "addxl %%d4, %%d3 \n\t"
+
+#define MULADDC_STOP \
+ "movl %%d3, %0 \n\t" \
+ "movl %%a3, %1 \n\t" \
+ "movl %%a2, %2 \n\t" \
+ : "=m" (c), "=m" (d), "=m" (s) \
+ : "m" (s), "m" (d), "m" (c), "m" (b) \
+ : "d0", "d1", "d2", "d3", "d4", "a2", "a3" \
+ );
+
+#define MULADDC_HUIT \
+ "movel %%a2@+, %%d1 \n\t" \
+ "mulul %%d2, %%d4:%%d1 \n\t" \
+ "addxl %%d3, %%d1 \n\t" \
+ "addxl %%d0, %%d4 \n\t" \
+ "addl %%d1, %%a3@+ \n\t" \
+ "movel %%a2@+, %%d1 \n\t" \
+ "mulul %%d2, %%d3:%%d1 \n\t" \
+ "addxl %%d4, %%d1 \n\t" \
+ "addxl %%d0, %%d3 \n\t" \
+ "addl %%d1, %%a3@+ \n\t" \
+ "movel %%a2@+, %%d1 \n\t" \
+ "mulul %%d2, %%d4:%%d1 \n\t" \
+ "addxl %%d3, %%d1 \n\t" \
+ "addxl %%d0, %%d4 \n\t" \
+ "addl %%d1, %%a3@+ \n\t" \
+ "movel %%a2@+, %%d1 \n\t" \
+ "mulul %%d2, %%d3:%%d1 \n\t" \
+ "addxl %%d4, %%d1 \n\t" \
+ "addxl %%d0, %%d3 \n\t" \
+ "addl %%d1, %%a3@+ \n\t" \
+ "movel %%a2@+, %%d1 \n\t" \
+ "mulul %%d2, %%d4:%%d1 \n\t" \
+ "addxl %%d3, %%d1 \n\t" \
+ "addxl %%d0, %%d4 \n\t" \
+ "addl %%d1, %%a3@+ \n\t" \
+ "movel %%a2@+, %%d1 \n\t" \
+ "mulul %%d2, %%d3:%%d1 \n\t" \
+ "addxl %%d4, %%d1 \n\t" \
+ "addxl %%d0, %%d3 \n\t" \
+ "addl %%d1, %%a3@+ \n\t" \
+ "movel %%a2@+, %%d1 \n\t" \
+ "mulul %%d2, %%d4:%%d1 \n\t" \
+ "addxl %%d3, %%d1 \n\t" \
+ "addxl %%d0, %%d4 \n\t" \
+ "addl %%d1, %%a3@+ \n\t" \
+ "movel %%a2@+, %%d1 \n\t" \
+ "mulul %%d2, %%d3:%%d1 \n\t" \
+ "addxl %%d4, %%d1 \n\t" \
+ "addxl %%d0, %%d3 \n\t" \
+ "addl %%d1, %%a3@+ \n\t" \
+ "addxl %%d0, %%d3 \n\t"
+
+#endif /* MC68000 */
+
+#if defined(__powerpc64__) || defined(__ppc64__)
+
+#if defined(__MACH__) && defined(__APPLE__)
+
+#define MULADDC_INIT \
+ asm( \
+ "ld r3, %3 \n\t" \
+ "ld r4, %4 \n\t" \
+ "ld r5, %5 \n\t" \
+ "ld r6, %6 \n\t" \
+ "addi r3, r3, -8 \n\t" \
+ "addi r4, r4, -8 \n\t" \
+ "addic r5, r5, 0 \n\t"
+
+#define MULADDC_CORE \
+ "ldu r7, 8(r3) \n\t" \
+ "mulld r8, r7, r6 \n\t" \
+ "mulhdu r9, r7, r6 \n\t" \
+ "adde r8, r8, r5 \n\t" \
+ "ld r7, 8(r4) \n\t" \
+ "addze r5, r9 \n\t" \
+ "addc r8, r8, r7 \n\t" \
+ "stdu r8, 8(r4) \n\t"
+
+#define MULADDC_STOP \
+ "addze r5, r5 \n\t" \
+ "addi r4, r4, 8 \n\t" \
+ "addi r3, r3, 8 \n\t" \
+ "std r5, %0 \n\t" \
+ "std r4, %1 \n\t" \
+ "std r3, %2 \n\t" \
+ : "=m" (c), "=m" (d), "=m" (s) \
+ : "m" (s), "m" (d), "m" (c), "m" (b) \
+ : "r3", "r4", "r5", "r6", "r7", "r8", "r9" \
+ );
+
+
+#else /* __MACH__ && __APPLE__ */
+
+#define MULADDC_INIT \
+ asm( \
+ "ld %%r3, %3 \n\t" \
+ "ld %%r4, %4 \n\t" \
+ "ld %%r5, %5 \n\t" \
+ "ld %%r6, %6 \n\t" \
+ "addi %%r3, %%r3, -8 \n\t" \
+ "addi %%r4, %%r4, -8 \n\t" \
+ "addic %%r5, %%r5, 0 \n\t"
+
+#define MULADDC_CORE \
+ "ldu %%r7, 8(%%r3) \n\t" \
+ "mulld %%r8, %%r7, %%r6 \n\t" \
+ "mulhdu %%r9, %%r7, %%r6 \n\t" \
+ "adde %%r8, %%r8, %%r5 \n\t" \
+ "ld %%r7, 8(%%r4) \n\t" \
+ "addze %%r5, %%r9 \n\t" \
+ "addc %%r8, %%r8, %%r7 \n\t" \
+ "stdu %%r8, 8(%%r4) \n\t"
+
+#define MULADDC_STOP \
+ "addze %%r5, %%r5 \n\t" \
+ "addi %%r4, %%r4, 8 \n\t" \
+ "addi %%r3, %%r3, 8 \n\t" \
+ "std %%r5, %0 \n\t" \
+ "std %%r4, %1 \n\t" \
+ "std %%r3, %2 \n\t" \
+ : "=m" (c), "=m" (d), "=m" (s) \
+ : "m" (s), "m" (d), "m" (c), "m" (b) \
+ : "r3", "r4", "r5", "r6", "r7", "r8", "r9" \
+ );
+
+#endif /* __MACH__ && __APPLE__ */
+
+#elif defined(__powerpc__) || defined(__ppc__) /* end PPC64/begin PPC32 */
+
+#if defined(__MACH__) && defined(__APPLE__)
+
+#define MULADDC_INIT \
+ asm( \
+ "lwz r3, %3 \n\t" \
+ "lwz r4, %4 \n\t" \
+ "lwz r5, %5 \n\t" \
+ "lwz r6, %6 \n\t" \
+ "addi r3, r3, -4 \n\t" \
+ "addi r4, r4, -4 \n\t" \
+ "addic r5, r5, 0 \n\t"
+
+#define MULADDC_CORE \
+ "lwzu r7, 4(r3) \n\t" \
+ "mullw r8, r7, r6 \n\t" \
+ "mulhwu r9, r7, r6 \n\t" \
+ "adde r8, r8, r5 \n\t" \
+ "lwz r7, 4(r4) \n\t" \
+ "addze r5, r9 \n\t" \
+ "addc r8, r8, r7 \n\t" \
+ "stwu r8, 4(r4) \n\t"
+
+#define MULADDC_STOP \
+ "addze r5, r5 \n\t" \
+ "addi r4, r4, 4 \n\t" \
+ "addi r3, r3, 4 \n\t" \
+ "stw r5, %0 \n\t" \
+ "stw r4, %1 \n\t" \
+ "stw r3, %2 \n\t" \
+ : "=m" (c), "=m" (d), "=m" (s) \
+ : "m" (s), "m" (d), "m" (c), "m" (b) \
+ : "r3", "r4", "r5", "r6", "r7", "r8", "r9" \
+ );
+
+#else /* __MACH__ && __APPLE__ */
+
+#define MULADDC_INIT \
+ asm( \
+ "lwz %%r3, %3 \n\t" \
+ "lwz %%r4, %4 \n\t" \
+ "lwz %%r5, %5 \n\t" \
+ "lwz %%r6, %6 \n\t" \
+ "addi %%r3, %%r3, -4 \n\t" \
+ "addi %%r4, %%r4, -4 \n\t" \
+ "addic %%r5, %%r5, 0 \n\t"
+
+#define MULADDC_CORE \
+ "lwzu %%r7, 4(%%r3) \n\t" \
+ "mullw %%r8, %%r7, %%r6 \n\t" \
+ "mulhwu %%r9, %%r7, %%r6 \n\t" \
+ "adde %%r8, %%r8, %%r5 \n\t" \
+ "lwz %%r7, 4(%%r4) \n\t" \
+ "addze %%r5, %%r9 \n\t" \
+ "addc %%r8, %%r8, %%r7 \n\t" \
+ "stwu %%r8, 4(%%r4) \n\t"
+
+#define MULADDC_STOP \
+ "addze %%r5, %%r5 \n\t" \
+ "addi %%r4, %%r4, 4 \n\t" \
+ "addi %%r3, %%r3, 4 \n\t" \
+ "stw %%r5, %0 \n\t" \
+ "stw %%r4, %1 \n\t" \
+ "stw %%r3, %2 \n\t" \
+ : "=m" (c), "=m" (d), "=m" (s) \
+ : "m" (s), "m" (d), "m" (c), "m" (b) \
+ : "r3", "r4", "r5", "r6", "r7", "r8", "r9" \
+ );
+
+#endif /* __MACH__ && __APPLE__ */
+
+#endif /* PPC32 */
+
+/*
+ * The Sparc(64) assembly is reported to be broken.
+ * Disable it for now, until we're able to fix it.
+ */
+#if 0 && defined(__sparc__)
+#if defined(__sparc64__)
+
+#define MULADDC_INIT \
+ asm( \
+ "ldx %3, %%o0 \n\t" \
+ "ldx %4, %%o1 \n\t" \
+ "ld %5, %%o2 \n\t" \
+ "ld %6, %%o3 \n\t"
+
+#define MULADDC_CORE \
+ "ld [%%o0], %%o4 \n\t" \
+ "inc 4, %%o0 \n\t" \
+ "ld [%%o1], %%o5 \n\t" \
+ "umul %%o3, %%o4, %%o4 \n\t" \
+ "addcc %%o4, %%o2, %%o4 \n\t" \
+ "rd %%y, %%g1 \n\t" \
+ "addx %%g1, 0, %%g1 \n\t" \
+ "addcc %%o4, %%o5, %%o4 \n\t" \
+ "st %%o4, [%%o1] \n\t" \
+ "addx %%g1, 0, %%o2 \n\t" \
+ "inc 4, %%o1 \n\t"
+
+ #define MULADDC_STOP \
+ "st %%o2, %0 \n\t" \
+ "stx %%o1, %1 \n\t" \
+ "stx %%o0, %2 \n\t" \
+ : "=m" (c), "=m" (d), "=m" (s) \
+ : "m" (s), "m" (d), "m" (c), "m" (b) \
+ : "g1", "o0", "o1", "o2", "o3", "o4", \
+ "o5" \
+ );
+
+#else /* __sparc64__ */
+
+#define MULADDC_INIT \
+ asm( \
+ "ld %3, %%o0 \n\t" \
+ "ld %4, %%o1 \n\t" \
+ "ld %5, %%o2 \n\t" \
+ "ld %6, %%o3 \n\t"
+
+#define MULADDC_CORE \
+ "ld [%%o0], %%o4 \n\t" \
+ "inc 4, %%o0 \n\t" \
+ "ld [%%o1], %%o5 \n\t" \
+ "umul %%o3, %%o4, %%o4 \n\t" \
+ "addcc %%o4, %%o2, %%o4 \n\t" \
+ "rd %%y, %%g1 \n\t" \
+ "addx %%g1, 0, %%g1 \n\t" \
+ "addcc %%o4, %%o5, %%o4 \n\t" \
+ "st %%o4, [%%o1] \n\t" \
+ "addx %%g1, 0, %%o2 \n\t" \
+ "inc 4, %%o1 \n\t"
+
+#define MULADDC_STOP \
+ "st %%o2, %0 \n\t" \
+ "st %%o1, %1 \n\t" \
+ "st %%o0, %2 \n\t" \
+ : "=m" (c), "=m" (d), "=m" (s) \
+ : "m" (s), "m" (d), "m" (c), "m" (b) \
+ : "g1", "o0", "o1", "o2", "o3", "o4", \
+ "o5" \
+ );
+
+#endif /* __sparc64__ */
+#endif /* __sparc__ */
+
+#if defined(__microblaze__) || defined(microblaze)
+
+#define MULADDC_INIT \
+ asm( \
+ "lwi r3, %3 \n\t" \
+ "lwi r4, %4 \n\t" \
+ "lwi r5, %5 \n\t" \
+ "lwi r6, %6 \n\t" \
+ "andi r7, r6, 0xffff \n\t" \
+ "bsrli r6, r6, 16 \n\t"
+
+#define MULADDC_CORE \
+ "lhui r8, r3, 0 \n\t" \
+ "addi r3, r3, 2 \n\t" \
+ "lhui r9, r3, 0 \n\t" \
+ "addi r3, r3, 2 \n\t" \
+ "mul r10, r9, r6 \n\t" \
+ "mul r11, r8, r7 \n\t" \
+ "mul r12, r9, r7 \n\t" \
+ "mul r13, r8, r6 \n\t" \
+ "bsrli r8, r10, 16 \n\t" \
+ "bsrli r9, r11, 16 \n\t" \
+ "add r13, r13, r8 \n\t" \
+ "add r13, r13, r9 \n\t" \
+ "bslli r10, r10, 16 \n\t" \
+ "bslli r11, r11, 16 \n\t" \
+ "add r12, r12, r10 \n\t" \
+ "addc r13, r13, r0 \n\t" \
+ "add r12, r12, r11 \n\t" \
+ "addc r13, r13, r0 \n\t" \
+ "lwi r10, r4, 0 \n\t" \
+ "add r12, r12, r10 \n\t" \
+ "addc r13, r13, r0 \n\t" \
+ "add r12, r12, r5 \n\t" \
+ "addc r5, r13, r0 \n\t" \
+ "swi r12, r4, 0 \n\t" \
+ "addi r4, r4, 4 \n\t"
+
+#define MULADDC_STOP \
+ "swi r5, %0 \n\t" \
+ "swi r4, %1 \n\t" \
+ "swi r3, %2 \n\t" \
+ : "=m" (c), "=m" (d), "=m" (s) \
+ : "m" (s), "m" (d), "m" (c), "m" (b) \
+ : "r3", "r4" "r5", "r6", "r7", "r8", \
+ "r9", "r10", "r11", "r12", "r13" \
+ );
+
+#endif /* MicroBlaze */
+
+#if defined(__tricore__)
+
+#define MULADDC_INIT \
+ asm( \
+ "ld.a %%a2, %3 \n\t" \
+ "ld.a %%a3, %4 \n\t" \
+ "ld.w %%d4, %5 \n\t" \
+ "ld.w %%d1, %6 \n\t" \
+ "xor %%d5, %%d5 \n\t"
+
+#define MULADDC_CORE \
+ "ld.w %%d0, [%%a2+] \n\t" \
+ "madd.u %%e2, %%e4, %%d0, %%d1 \n\t" \
+ "ld.w %%d0, [%%a3] \n\t" \
+ "addx %%d2, %%d2, %%d0 \n\t" \
+ "addc %%d3, %%d3, 0 \n\t" \
+ "mov %%d4, %%d3 \n\t" \
+ "st.w [%%a3+], %%d2 \n\t"
+
+#define MULADDC_STOP \
+ "st.w %0, %%d4 \n\t" \
+ "st.a %1, %%a3 \n\t" \
+ "st.a %2, %%a2 \n\t" \
+ : "=m" (c), "=m" (d), "=m" (s) \
+ : "m" (s), "m" (d), "m" (c), "m" (b) \
+ : "d0", "d1", "e2", "d4", "a2", "a3" \
+ );
+
+#endif /* TriCore */
+
+/*
+ * gcc -O0 by default uses r7 for the frame pointer, so it complains about our
+ * use of r7 below, unless -fomit-frame-pointer is passed. Unfortunately,
+ * passing that option is not easy when building with yotta.
+ *
+ * On the other hand, -fomit-frame-pointer is implied by any -Ox options with
+ * x !=0, which we can detect using __OPTIMIZE__ (which is also defined by
+ * clang and armcc5 under the same conditions).
+ *
+ * So, only use the optimized assembly below for optimized build, which avoids
+ * the build error and is pretty reasonable anyway.
+ */
+#if defined(__GNUC__) && !defined(__OPTIMIZE__)
+#define MULADDC_CANNOT_USE_R7
+#endif
+
+#if defined(__arm__) && !defined(MULADDC_CANNOT_USE_R7)
+
+#if defined(__thumb__) && !defined(__thumb2__)
+
+#define MULADDC_INIT \
+ asm( \
+ "ldr r0, %3 \n\t" \
+ "ldr r1, %4 \n\t" \
+ "ldr r2, %5 \n\t" \
+ "ldr r3, %6 \n\t" \
+ "lsr r7, r3, #16 \n\t" \
+ "mov r9, r7 \n\t" \
+ "lsl r7, r3, #16 \n\t" \
+ "lsr r7, r7, #16 \n\t" \
+ "mov r8, r7 \n\t"
+
+#define MULADDC_CORE \
+ "ldmia r0!, {r6} \n\t" \
+ "lsr r7, r6, #16 \n\t" \
+ "lsl r6, r6, #16 \n\t" \
+ "lsr r6, r6, #16 \n\t" \
+ "mov r4, r8 \n\t" \
+ "mul r4, r6 \n\t" \
+ "mov r3, r9 \n\t" \
+ "mul r6, r3 \n\t" \
+ "mov r5, r9 \n\t" \
+ "mul r5, r7 \n\t" \
+ "mov r3, r8 \n\t" \
+ "mul r7, r3 \n\t" \
+ "lsr r3, r6, #16 \n\t" \
+ "add r5, r5, r3 \n\t" \
+ "lsr r3, r7, #16 \n\t" \
+ "add r5, r5, r3 \n\t" \
+ "add r4, r4, r2 \n\t" \
+ "mov r2, #0 \n\t" \
+ "adc r5, r2 \n\t" \
+ "lsl r3, r6, #16 \n\t" \
+ "add r4, r4, r3 \n\t" \
+ "adc r5, r2 \n\t" \
+ "lsl r3, r7, #16 \n\t" \
+ "add r4, r4, r3 \n\t" \
+ "adc r5, r2 \n\t" \
+ "ldr r3, [r1] \n\t" \
+ "add r4, r4, r3 \n\t" \
+ "adc r2, r5 \n\t" \
+ "stmia r1!, {r4} \n\t"
+
+#define MULADDC_STOP \
+ "str r2, %0 \n\t" \
+ "str r1, %1 \n\t" \
+ "str r0, %2 \n\t" \
+ : "=m" (c), "=m" (d), "=m" (s) \
+ : "m" (s), "m" (d), "m" (c), "m" (b) \
+ : "r0", "r1", "r2", "r3", "r4", "r5", \
+ "r6", "r7", "r8", "r9", "cc" \
+ );
+
+#else
+
+#define MULADDC_INIT \
+ asm( \
+ "ldr r0, %3 \n\t" \
+ "ldr r1, %4 \n\t" \
+ "ldr r2, %5 \n\t" \
+ "ldr r3, %6 \n\t"
+
+#define MULADDC_CORE \
+ "ldr r4, [r0], #4 \n\t" \
+ "mov r5, #0 \n\t" \
+ "ldr r6, [r1] \n\t" \
+ "umlal r2, r5, r3, r4 \n\t" \
+ "adds r7, r6, r2 \n\t" \
+ "adc r2, r5, #0 \n\t" \
+ "str r7, [r1], #4 \n\t"
+
+#define MULADDC_STOP \
+ "str r2, %0 \n\t" \
+ "str r1, %1 \n\t" \
+ "str r0, %2 \n\t" \
+ : "=m" (c), "=m" (d), "=m" (s) \
+ : "m" (s), "m" (d), "m" (c), "m" (b) \
+ : "r0", "r1", "r2", "r3", "r4", "r5", \
+ "r6", "r7", "cc" \
+ );
+
+#endif /* Thumb */
+
+#endif /* ARMv3 */
+
+#if defined(__alpha__)
+
+#define MULADDC_INIT \
+ asm( \
+ "ldq $1, %3 \n\t" \
+ "ldq $2, %4 \n\t" \
+ "ldq $3, %5 \n\t" \
+ "ldq $4, %6 \n\t"
+
+#define MULADDC_CORE \
+ "ldq $6, 0($1) \n\t" \
+ "addq $1, 8, $1 \n\t" \
+ "mulq $6, $4, $7 \n\t" \
+ "umulh $6, $4, $6 \n\t" \
+ "addq $7, $3, $7 \n\t" \
+ "cmpult $7, $3, $3 \n\t" \
+ "ldq $5, 0($2) \n\t" \
+ "addq $7, $5, $7 \n\t" \
+ "cmpult $7, $5, $5 \n\t" \
+ "stq $7, 0($2) \n\t" \
+ "addq $2, 8, $2 \n\t" \
+ "addq $6, $3, $3 \n\t" \
+ "addq $5, $3, $3 \n\t"
+
+#define MULADDC_STOP \
+ "stq $3, %0 \n\t" \
+ "stq $2, %1 \n\t" \
+ "stq $1, %2 \n\t" \
+ : "=m" (c), "=m" (d), "=m" (s) \
+ : "m" (s), "m" (d), "m" (c), "m" (b) \
+ : "$1", "$2", "$3", "$4", "$5", "$6", "$7" \
+ );
+#endif /* Alpha */
+
+#if defined(__mips__) && !defined(__mips64)
+
+#define MULADDC_INIT \
+ asm( \
+ "lw $10, %3 \n\t" \
+ "lw $11, %4 \n\t" \
+ "lw $12, %5 \n\t" \
+ "lw $13, %6 \n\t"
+
+#define MULADDC_CORE \
+ "lw $14, 0($10) \n\t" \
+ "multu $13, $14 \n\t" \
+ "addi $10, $10, 4 \n\t" \
+ "mflo $14 \n\t" \
+ "mfhi $9 \n\t" \
+ "addu $14, $12, $14 \n\t" \
+ "lw $15, 0($11) \n\t" \
+ "sltu $12, $14, $12 \n\t" \
+ "addu $15, $14, $15 \n\t" \
+ "sltu $14, $15, $14 \n\t" \
+ "addu $12, $12, $9 \n\t" \
+ "sw $15, 0($11) \n\t" \
+ "addu $12, $12, $14 \n\t" \
+ "addi $11, $11, 4 \n\t"
+
+#define MULADDC_STOP \
+ "sw $12, %0 \n\t" \
+ "sw $11, %1 \n\t" \
+ "sw $10, %2 \n\t" \
+ : "=m" (c), "=m" (d), "=m" (s) \
+ : "m" (s), "m" (d), "m" (c), "m" (b) \
+ : "$9", "$10", "$11", "$12", "$13", "$14", "$15" \
+ );
+
+#endif /* MIPS */
+#endif /* GNUC */
+
+#if (defined(_MSC_VER) && defined(_M_IX86)) || defined(__WATCOMC__)
+
+#define MULADDC_INIT \
+ __asm mov esi, s \
+ __asm mov edi, d \
+ __asm mov ecx, c \
+ __asm mov ebx, b
+
+#define MULADDC_CORE \
+ __asm lodsd \
+ __asm mul ebx \
+ __asm add eax, ecx \
+ __asm adc edx, 0 \
+ __asm add eax, [edi] \
+ __asm adc edx, 0 \
+ __asm mov ecx, edx \
+ __asm stosd
+
+#if defined(MBEDTLS_HAVE_SSE2)
+
+#define EMIT __asm _emit
+
+#define MULADDC_HUIT \
+ EMIT 0x0F EMIT 0x6E EMIT 0xC9 \
+ EMIT 0x0F EMIT 0x6E EMIT 0xC3 \
+ EMIT 0x0F EMIT 0x6E EMIT 0x1F \
+ EMIT 0x0F EMIT 0xD4 EMIT 0xCB \
+ EMIT 0x0F EMIT 0x6E EMIT 0x16 \
+ EMIT 0x0F EMIT 0xF4 EMIT 0xD0 \
+ EMIT 0x0F EMIT 0x6E EMIT 0x66 EMIT 0x04 \
+ EMIT 0x0F EMIT 0xF4 EMIT 0xE0 \
+ EMIT 0x0F EMIT 0x6E EMIT 0x76 EMIT 0x08 \
+ EMIT 0x0F EMIT 0xF4 EMIT 0xF0 \
+ EMIT 0x0F EMIT 0x6E EMIT 0x7E EMIT 0x0C \
+ EMIT 0x0F EMIT 0xF4 EMIT 0xF8 \
+ EMIT 0x0F EMIT 0xD4 EMIT 0xCA \
+ EMIT 0x0F EMIT 0x6E EMIT 0x5F EMIT 0x04 \
+ EMIT 0x0F EMIT 0xD4 EMIT 0xDC \
+ EMIT 0x0F EMIT 0x6E EMIT 0x6F EMIT 0x08 \
+ EMIT 0x0F EMIT 0xD4 EMIT 0xEE \
+ EMIT 0x0F EMIT 0x6E EMIT 0x67 EMIT 0x0C \
+ EMIT 0x0F EMIT 0xD4 EMIT 0xFC \
+ EMIT 0x0F EMIT 0x7E EMIT 0x0F \
+ EMIT 0x0F EMIT 0x6E EMIT 0x56 EMIT 0x10 \
+ EMIT 0x0F EMIT 0xF4 EMIT 0xD0 \
+ EMIT 0x0F EMIT 0x73 EMIT 0xD1 EMIT 0x20 \
+ EMIT 0x0F EMIT 0x6E EMIT 0x66 EMIT 0x14 \
+ EMIT 0x0F EMIT 0xF4 EMIT 0xE0 \
+ EMIT 0x0F EMIT 0xD4 EMIT 0xCB \
+ EMIT 0x0F EMIT 0x6E EMIT 0x76 EMIT 0x18 \
+ EMIT 0x0F EMIT 0xF4 EMIT 0xF0 \
+ EMIT 0x0F EMIT 0x7E EMIT 0x4F EMIT 0x04 \
+ EMIT 0x0F EMIT 0x73 EMIT 0xD1 EMIT 0x20 \
+ EMIT 0x0F EMIT 0x6E EMIT 0x5E EMIT 0x1C \
+ EMIT 0x0F EMIT 0xF4 EMIT 0xD8 \
+ EMIT 0x0F EMIT 0xD4 EMIT 0xCD \
+ EMIT 0x0F EMIT 0x6E EMIT 0x6F EMIT 0x10 \
+ EMIT 0x0F EMIT 0xD4 EMIT 0xD5 \
+ EMIT 0x0F EMIT 0x7E EMIT 0x4F EMIT 0x08 \
+ EMIT 0x0F EMIT 0x73 EMIT 0xD1 EMIT 0x20 \
+ EMIT 0x0F EMIT 0xD4 EMIT 0xCF \
+ EMIT 0x0F EMIT 0x6E EMIT 0x6F EMIT 0x14 \
+ EMIT 0x0F EMIT 0xD4 EMIT 0xE5 \
+ EMIT 0x0F EMIT 0x7E EMIT 0x4F EMIT 0x0C \
+ EMIT 0x0F EMIT 0x73 EMIT 0xD1 EMIT 0x20 \
+ EMIT 0x0F EMIT 0xD4 EMIT 0xCA \
+ EMIT 0x0F EMIT 0x6E EMIT 0x6F EMIT 0x18 \
+ EMIT 0x0F EMIT 0xD4 EMIT 0xF5 \
+ EMIT 0x0F EMIT 0x7E EMIT 0x4F EMIT 0x10 \
+ EMIT 0x0F EMIT 0x73 EMIT 0xD1 EMIT 0x20 \
+ EMIT 0x0F EMIT 0xD4 EMIT 0xCC \
+ EMIT 0x0F EMIT 0x6E EMIT 0x6F EMIT 0x1C \
+ EMIT 0x0F EMIT 0xD4 EMIT 0xDD \
+ EMIT 0x0F EMIT 0x7E EMIT 0x4F EMIT 0x14 \
+ EMIT 0x0F EMIT 0x73 EMIT 0xD1 EMIT 0x20 \
+ EMIT 0x0F EMIT 0xD4 EMIT 0xCE \
+ EMIT 0x0F EMIT 0x7E EMIT 0x4F EMIT 0x18 \
+ EMIT 0x0F EMIT 0x73 EMIT 0xD1 EMIT 0x20 \
+ EMIT 0x0F EMIT 0xD4 EMIT 0xCB \
+ EMIT 0x0F EMIT 0x7E EMIT 0x4F EMIT 0x1C \
+ EMIT 0x83 EMIT 0xC7 EMIT 0x20 \
+ EMIT 0x83 EMIT 0xC6 EMIT 0x20 \
+ EMIT 0x0F EMIT 0x73 EMIT 0xD1 EMIT 0x20 \
+ EMIT 0x0F EMIT 0x7E EMIT 0xC9
+
+#define MULADDC_STOP \
+ EMIT 0x0F EMIT 0x77 \
+ __asm mov c, ecx \
+ __asm mov d, edi \
+ __asm mov s, esi \
+
+#else
+
+#define MULADDC_STOP \
+ __asm mov c, ecx \
+ __asm mov d, edi \
+ __asm mov s, esi \
+
+#endif /* SSE2 */
+#endif /* MSVC */
+
+#endif /* MBEDTLS_HAVE_ASM */
+
+#if !defined(MULADDC_CORE)
+#if defined(MBEDTLS_HAVE_UDBL)
+
+#define MULADDC_INIT \
+{ \
+ mbedtls_t_udbl r; \
+ mbedtls_mpi_uint r0, r1;
+
+#define MULADDC_CORE \
+ r = *(s++) * (mbedtls_t_udbl) b; \
+ r0 = (mbedtls_mpi_uint) r; \
+ r1 = (mbedtls_mpi_uint)( r >> biL ); \
+ r0 += c; r1 += (r0 < c); \
+ r0 += *d; r1 += (r0 < *d); \
+ c = r1; *(d++) = r0;
+
+#define MULADDC_STOP \
+}
+
+#else
+#define MULADDC_INIT \
+{ \
+ mbedtls_mpi_uint s0, s1, b0, b1; \
+ mbedtls_mpi_uint r0, r1, rx, ry; \
+ b0 = ( b << biH ) >> biH; \
+ b1 = ( b >> biH );
+
+#define MULADDC_CORE \
+ s0 = ( *s << biH ) >> biH; \
+ s1 = ( *s >> biH ); s++; \
+ rx = s0 * b1; r0 = s0 * b0; \
+ ry = s1 * b0; r1 = s1 * b1; \
+ r1 += ( rx >> biH ); \
+ r1 += ( ry >> biH ); \
+ rx <<= biH; ry <<= biH; \
+ r0 += rx; r1 += (r0 < rx); \
+ r0 += ry; r1 += (r0 < ry); \
+ r0 += c; r1 += (r0 < c); \
+ r0 += *d; r1 += (r0 < *d); \
+ c = r1; *(d++) = r0;
+
+#define MULADDC_STOP \
+}
+
+#endif /* C (generic) */
+#endif /* C (longlong) */
+
+#endif /* bn_mul.h */
diff --git a/backport/compat/verification/mbedtls/config.h b/backport/compat/verification/mbedtls/config.h
new file mode 100644
index 00000000..91d900de
--- /dev/null
+++ b/backport/compat/verification/mbedtls/config.h
@@ -0,0 +1,15 @@
+#ifndef __MBEDTLS_CONFIG_H
+#define __MBEDTLS_CONFIG_H
+#define MBEDTLS_RSA_C
+#define MBEDTLS_PKCS1_V15
+#define MBEDTLS_MD_C
+#define __OpenBSD__
+#define MBEDTLS_PLATFORM_C
+#define MBEDTLS_BIGNUM_C
+#define MBEDTLS_OID_C
+#define MBEDTLS_ASN1_PARSE_C
+#define MBEDTLS_NO_UDBL_DIVISION
+#define MBEDTLS_SHA256_C
+#include <linux/types.h>
+#include "platform.h"
+#endif /* __MBEDTLS_CONFIG_H */
diff --git a/backport/compat/verification/mbedtls/md.h b/backport/compat/verification/mbedtls/md.h
new file mode 100644
index 00000000..9385116c
--- /dev/null
+++ b/backport/compat/verification/mbedtls/md.h
@@ -0,0 +1,356 @@
+/**
+ * \file md.h
+ *
+ * \brief Generic message digest wrapper
+ *
+ * \author Adriaan de Jong <dejong@fox-it.com>
+ *
+ * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
+ * SPDX-License-Identifier: GPL-2.0
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * This file is part of mbed TLS (https://tls.mbed.org)
+ */
+#ifndef MBEDTLS_MD_H
+#define MBEDTLS_MD_H
+
+#include <stddef.h>
+
+#define MBEDTLS_ERR_MD_FEATURE_UNAVAILABLE -0x5080 /**< The selected feature is not available. */
+#define MBEDTLS_ERR_MD_BAD_INPUT_DATA -0x5100 /**< Bad input parameters to function. */
+#define MBEDTLS_ERR_MD_ALLOC_FAILED -0x5180 /**< Failed to allocate memory. */
+#define MBEDTLS_ERR_MD_FILE_IO_ERROR -0x5200 /**< Opening or reading of file failed. */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef enum {
+ MBEDTLS_MD_NONE=0,
+ MBEDTLS_MD_MD2,
+ MBEDTLS_MD_MD4,
+ MBEDTLS_MD_MD5,
+ MBEDTLS_MD_SHA1,
+ MBEDTLS_MD_SHA224,
+ MBEDTLS_MD_SHA256,
+ MBEDTLS_MD_SHA384,
+ MBEDTLS_MD_SHA512,
+ MBEDTLS_MD_RIPEMD160,
+} mbedtls_md_type_t;
+
+#if defined(MBEDTLS_SHA512_C)
+#define MBEDTLS_MD_MAX_SIZE 64 /* longest known is SHA512 */
+#else
+#define MBEDTLS_MD_MAX_SIZE 32 /* longest known is SHA256 or less */
+#endif
+
+/**
+ * Opaque struct defined in md_internal.h
+ */
+typedef struct mbedtls_md_info_t mbedtls_md_info_t;
+
+/**
+ * Generic message digest context.
+ */
+typedef struct {
+ /** Information about the associated message digest */
+ const mbedtls_md_info_t *md_info;
+
+ /** Digest-specific context */
+ void *md_ctx;
+
+ /** HMAC part of the context */
+ void *hmac_ctx;
+} mbedtls_md_context_t;
+
+/**
+ * \brief Returns the list of digests supported by the generic digest module.
+ *
+ * \return a statically allocated array of digests, the last entry
+ * is 0.
+ */
+const int *mbedtls_md_list( void );
+
+/**
+ * \brief Returns the message digest information associated with the
+ * given digest name.
+ *
+ * \param md_name Name of the digest to search for.
+ *
+ * \return The message digest information associated with md_name or
+ * NULL if not found.
+ */
+const mbedtls_md_info_t *mbedtls_md_info_from_string( const char *md_name );
+
+/**
+ * \brief Returns the message digest information associated with the
+ * given digest type.
+ *
+ * \param md_type type of digest to search for.
+ *
+ * \return The message digest information associated with md_type or
+ * NULL if not found.
+ */
+const mbedtls_md_info_t *mbedtls_md_info_from_type( mbedtls_md_type_t md_type );
+
+/**
+ * \brief Initialize a md_context (as NONE)
+ * This should always be called first.
+ * Prepares the context for mbedtls_md_setup() or mbedtls_md_free().
+ */
+void mbedtls_md_init( mbedtls_md_context_t *ctx );
+
+/**
+ * \brief Free and clear the internal structures of ctx.
+ * Can be called at any time after mbedtls_md_init().
+ * Mandatory once mbedtls_md_setup() has been called.
+ */
+void mbedtls_md_free( mbedtls_md_context_t *ctx );
+
+#if ! defined(MBEDTLS_DEPRECATED_REMOVED)
+#if defined(MBEDTLS_DEPRECATED_WARNING)
+#define MBEDTLS_DEPRECATED __attribute__((deprecated))
+#else
+#define MBEDTLS_DEPRECATED
+#endif
+/**
+ * \brief Select MD to use and allocate internal structures.
+ * Should be called after mbedtls_md_init() or mbedtls_md_free().
+ * Makes it necessary to call mbedtls_md_free() later.
+ *
+ * \deprecated Superseded by mbedtls_md_setup() in 2.0.0
+ *
+ * \param ctx Context to set up.
+ * \param md_info Message digest to use.
+ *
+ * \returns \c 0 on success,
+ * \c MBEDTLS_ERR_MD_BAD_INPUT_DATA on parameter failure,
+ * \c MBEDTLS_ERR_MD_ALLOC_FAILED memory allocation failure.
+ */
+int mbedtls_md_init_ctx( mbedtls_md_context_t *ctx, const mbedtls_md_info_t *md_info ) MBEDTLS_DEPRECATED;
+#undef MBEDTLS_DEPRECATED
+#endif /* MBEDTLS_DEPRECATED_REMOVED */
+
+/**
+ * \brief Select MD to use and allocate internal structures.
+ * Should be called after mbedtls_md_init() or mbedtls_md_free().
+ * Makes it necessary to call mbedtls_md_free() later.
+ *
+ * \param ctx Context to set up.
+ * \param md_info Message digest to use.
+ * \param hmac 0 to save some memory if HMAC will not be used,
+ * non-zero is HMAC is going to be used with this context.
+ *
+ * \returns \c 0 on success,
+ * \c MBEDTLS_ERR_MD_BAD_INPUT_DATA on parameter failure,
+ * \c MBEDTLS_ERR_MD_ALLOC_FAILED memory allocation failure.
+ */
+int mbedtls_md_setup( mbedtls_md_context_t *ctx, const mbedtls_md_info_t *md_info, int hmac );
+
+/**
+ * \brief Clone the state of an MD context
+ *
+ * \note The two contexts must have been setup to the same type
+ * (cloning from SHA-256 to SHA-512 make no sense).
+ *
+ * \warning Only clones the MD state, not the HMAC state! (for now)
+ *
+ * \param dst The destination context
+ * \param src The context to be cloned
+ *
+ * \return \c 0 on success,
+ * \c MBEDTLS_ERR_MD_BAD_INPUT_DATA on parameter failure.
+ */
+int mbedtls_md_clone( mbedtls_md_context_t *dst,
+ const mbedtls_md_context_t *src );
+
+/**
+ * \brief Returns the size of the message digest output.
+ *
+ * \param md_info message digest info
+ *
+ * \return size of the message digest output in bytes.
+ */
+unsigned char mbedtls_md_get_size( const mbedtls_md_info_t *md_info );
+
+/**
+ * \brief Returns the type of the message digest output.
+ *
+ * \param md_info message digest info
+ *
+ * \return type of the message digest output.
+ */
+mbedtls_md_type_t mbedtls_md_get_type( const mbedtls_md_info_t *md_info );
+
+/**
+ * \brief Returns the name of the message digest output.
+ *
+ * \param md_info message digest info
+ *
+ * \return name of the message digest output.
+ */
+const char *mbedtls_md_get_name( const mbedtls_md_info_t *md_info );
+
+/**
+ * \brief Prepare the context to digest a new message.
+ * Generally called after mbedtls_md_setup() or mbedtls_md_finish().
+ * Followed by mbedtls_md_update().
+ *
+ * \param ctx generic message digest context.
+ *
+ * \returns 0 on success, MBEDTLS_ERR_MD_BAD_INPUT_DATA if parameter
+ * verification fails.
+ */
+int mbedtls_md_starts( mbedtls_md_context_t *ctx );
+
+/**
+ * \brief Generic message digest process buffer
+ * Called between mbedtls_md_starts() and mbedtls_md_finish().
+ * May be called repeatedly.
+ *
+ * \param ctx Generic message digest context
+ * \param input buffer holding the datal
+ * \param ilen length of the input data
+ *
+ * \returns 0 on success, MBEDTLS_ERR_MD_BAD_INPUT_DATA if parameter
+ * verification fails.
+ */
+int mbedtls_md_update( mbedtls_md_context_t *ctx, const unsigned char *input, size_t ilen );
+
+/**
+ * \brief Generic message digest final digest
+ * Called after mbedtls_md_update().
+ * Usually followed by mbedtls_md_free() or mbedtls_md_starts().
+ *
+ * \param ctx Generic message digest context
+ * \param output Generic message digest checksum result
+ *
+ * \returns 0 on success, MBEDTLS_ERR_MD_BAD_INPUT_DATA if parameter
+ * verification fails.
+ */
+int mbedtls_md_finish( mbedtls_md_context_t *ctx, unsigned char *output );
+
+/**
+ * \brief Output = message_digest( input buffer )
+ *
+ * \param md_info message digest info
+ * \param input buffer holding the data
+ * \param ilen length of the input data
+ * \param output Generic message digest checksum result
+ *
+ * \returns 0 on success, MBEDTLS_ERR_MD_BAD_INPUT_DATA if parameter
+ * verification fails.
+ */
+int mbedtls_md( const mbedtls_md_info_t *md_info, const unsigned char *input, size_t ilen,
+ unsigned char *output );
+
+#if defined(MBEDTLS_FS_IO)
+/**
+ * \brief Output = message_digest( file contents )
+ *
+ * \param md_info message digest info
+ * \param path input file name
+ * \param output generic message digest checksum result
+ *
+ * \return 0 if successful,
+ * MBEDTLS_ERR_MD_FILE_IO_ERROR if file input failed,
+ * MBEDTLS_ERR_MD_BAD_INPUT_DATA if md_info was NULL.
+ */
+int mbedtls_md_file( const mbedtls_md_info_t *md_info, const char *path,
+ unsigned char *output );
+#endif /* MBEDTLS_FS_IO */
+
+/**
+ * \brief Set HMAC key and prepare to authenticate a new message.
+ * Usually called after mbedtls_md_setup() or mbedtls_md_hmac_finish().
+ *
+ * \param ctx HMAC context
+ * \param key HMAC secret key
+ * \param keylen length of the HMAC key in bytes
+ *
+ * \returns 0 on success, MBEDTLS_ERR_MD_BAD_INPUT_DATA if parameter
+ * verification fails.
+ */
+int mbedtls_md_hmac_starts( mbedtls_md_context_t *ctx, const unsigned char *key,
+ size_t keylen );
+
+/**
+ * \brief Generic HMAC process buffer.
+ * Called between mbedtls_md_hmac_starts() or mbedtls_md_hmac_reset()
+ * and mbedtls_md_hmac_finish().
+ * May be called repeatedly.
+ *
+ * \param ctx HMAC context
+ * \param input buffer holding the data
+ * \param ilen length of the input data
+ *
+ * \returns 0 on success, MBEDTLS_ERR_MD_BAD_INPUT_DATA if parameter
+ * verification fails.
+ */
+int mbedtls_md_hmac_update( mbedtls_md_context_t *ctx, const unsigned char *input,
+ size_t ilen );
+
+/**
+ * \brief Output HMAC.
+ * Called after mbedtls_md_hmac_update().
+ * Usually followed by mbedtls_md_hmac_reset(),
+ * mbedtls_md_hmac_starts(), or mbedtls_md_free().
+ *
+ * \param ctx HMAC context
+ * \param output Generic HMAC checksum result
+ *
+ * \returns 0 on success, MBEDTLS_ERR_MD_BAD_INPUT_DATA if parameter
+ * verification fails.
+ */
+int mbedtls_md_hmac_finish( mbedtls_md_context_t *ctx, unsigned char *output);
+
+/**
+ * \brief Prepare to authenticate a new message with the same key.
+ * Called after mbedtls_md_hmac_finish() and before
+ * mbedtls_md_hmac_update().
+ *
+ * \param ctx HMAC context to be reset
+ *
+ * \returns 0 on success, MBEDTLS_ERR_MD_BAD_INPUT_DATA if parameter
+ * verification fails.
+ */
+int mbedtls_md_hmac_reset( mbedtls_md_context_t *ctx );
+
+/**
+ * \brief Output = Generic_HMAC( hmac key, input buffer )
+ *
+ * \param md_info message digest info
+ * \param key HMAC secret key
+ * \param keylen length of the HMAC key in bytes
+ * \param input buffer holding the data
+ * \param ilen length of the input data
+ * \param output Generic HMAC-result
+ *
+ * \returns 0 on success, MBEDTLS_ERR_MD_BAD_INPUT_DATA if parameter
+ * verification fails.
+ */
+int mbedtls_md_hmac( const mbedtls_md_info_t *md_info, const unsigned char *key, size_t keylen,
+ const unsigned char *input, size_t ilen,
+ unsigned char *output );
+
+/* Internal use */
+int mbedtls_md_process( mbedtls_md_context_t *ctx, const unsigned char *data );
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* MBEDTLS_MD_H */
diff --git a/backport/compat/verification/mbedtls/md_internal.h b/backport/compat/verification/mbedtls/md_internal.h
new file mode 100644
index 00000000..0a8600b4
--- /dev/null
+++ b/backport/compat/verification/mbedtls/md_internal.h
@@ -0,0 +1,116 @@
+/**
+ * \file md_internal.h
+ *
+ * \brief Message digest wrappers.
+ *
+ * \warning This in an internal header. Do not include directly.
+ *
+ * \author Adriaan de Jong <dejong@fox-it.com>
+ *
+ * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
+ * SPDX-License-Identifier: GPL-2.0
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * This file is part of mbed TLS (https://tls.mbed.org)
+ */
+#ifndef MBEDTLS_MD_WRAP_H
+#define MBEDTLS_MD_WRAP_H
+
+#if !defined(MBEDTLS_CONFIG_FILE)
+#include "config.h"
+#else
+#include MBEDTLS_CONFIG_FILE
+#endif
+
+#include "md.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * Message digest information.
+ * Allows message digest functions to be called in a generic way.
+ */
+struct mbedtls_md_info_t
+{
+ /** Digest identifier */
+ mbedtls_md_type_t type;
+
+ /** Name of the message digest */
+ const char * name;
+
+ /** Output length of the digest function in bytes */
+ int size;
+
+ /** Block length of the digest function in bytes */
+ int block_size;
+
+ /** Digest initialisation function */
+ void (*starts_func)( void *ctx );
+
+ /** Digest update function */
+ void (*update_func)( void *ctx, const unsigned char *input, size_t ilen );
+
+ /** Digest finalisation function */
+ void (*finish_func)( void *ctx, unsigned char *output );
+
+ /** Generic digest function */
+ void (*digest_func)( const unsigned char *input, size_t ilen,
+ unsigned char *output );
+
+ /** Allocate a new context */
+ void * (*ctx_alloc_func)( void );
+
+ /** Free the given context */
+ void (*ctx_free_func)( void *ctx );
+
+ /** Clone state from a context */
+ void (*clone_func)( void *dst, const void *src );
+
+ /** Internal use only */
+ void (*process_func)( void *ctx, const unsigned char *input );
+};
+
+#if defined(MBEDTLS_MD2_C)
+extern const mbedtls_md_info_t mbedtls_md2_info;
+#endif
+#if defined(MBEDTLS_MD4_C)
+extern const mbedtls_md_info_t mbedtls_md4_info;
+#endif
+#if defined(MBEDTLS_MD5_C)
+extern const mbedtls_md_info_t mbedtls_md5_info;
+#endif
+#if defined(MBEDTLS_RIPEMD160_C)
+extern const mbedtls_md_info_t mbedtls_ripemd160_info;
+#endif
+#if defined(MBEDTLS_SHA1_C)
+extern const mbedtls_md_info_t mbedtls_sha1_info;
+#endif
+#if defined(MBEDTLS_SHA256_C)
+extern const mbedtls_md_info_t mbedtls_sha224_info;
+extern const mbedtls_md_info_t mbedtls_sha256_info;
+#endif
+#if defined(MBEDTLS_SHA512_C)
+extern const mbedtls_md_info_t mbedtls_sha384_info;
+extern const mbedtls_md_info_t mbedtls_sha512_info;
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* MBEDTLS_MD_WRAP_H */
diff --git a/backport/compat/verification/mbedtls/oid.h b/backport/compat/verification/mbedtls/oid.h
new file mode 100644
index 00000000..117ee475
--- /dev/null
+++ b/backport/compat/verification/mbedtls/oid.h
@@ -0,0 +1,572 @@
+/**
+ * \file oid.h
+ *
+ * \brief Object Identifier (OID) database
+ *
+ * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
+ * SPDX-License-Identifier: GPL-2.0
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * This file is part of mbed TLS (https://tls.mbed.org)
+ */
+#ifndef MBEDTLS_OID_H
+#define MBEDTLS_OID_H
+
+#if !defined(MBEDTLS_CONFIG_FILE)
+#include "config.h"
+#else
+#include MBEDTLS_CONFIG_FILE
+#endif
+
+#include "asn1.h"
+#include "pk.h"
+
+#include <stddef.h>
+
+#if defined(MBEDTLS_CIPHER_C)
+#include "cipher.h"
+#endif
+
+#if defined(MBEDTLS_MD_C)
+#include "md.h"
+#endif
+
+#if defined(MBEDTLS_X509_USE_C) || defined(MBEDTLS_X509_CREATE_C)
+#include "x509.h"
+#endif
+
+#define MBEDTLS_ERR_OID_NOT_FOUND -0x002E /**< OID is not found. */
+#define MBEDTLS_ERR_OID_BUF_TOO_SMALL -0x000B /**< output buffer is too small */
+
+/*
+ * Top level OID tuples
+ */
+#define MBEDTLS_OID_ISO_MEMBER_BODIES "\x2a" /* {iso(1) member-body(2)} */
+#define MBEDTLS_OID_ISO_IDENTIFIED_ORG "\x2b" /* {iso(1) identified-organization(3)} */
+#define MBEDTLS_OID_ISO_CCITT_DS "\x55" /* {joint-iso-ccitt(2) ds(5)} */
+#define MBEDTLS_OID_ISO_ITU_COUNTRY "\x60" /* {joint-iso-itu-t(2) country(16)} */
+
+/*
+ * ISO Member bodies OID parts
+ */
+#define MBEDTLS_OID_COUNTRY_US "\x86\x48" /* {us(840)} */
+#define MBEDTLS_OID_ORG_RSA_DATA_SECURITY "\x86\xf7\x0d" /* {rsadsi(113549)} */
+#define MBEDTLS_OID_RSA_COMPANY MBEDTLS_OID_ISO_MEMBER_BODIES MBEDTLS_OID_COUNTRY_US \
+ MBEDTLS_OID_ORG_RSA_DATA_SECURITY /* {iso(1) member-body(2) us(840) rsadsi(113549)} */
+#define MBEDTLS_OID_ORG_ANSI_X9_62 "\xce\x3d" /* ansi-X9-62(10045) */
+#define MBEDTLS_OID_ANSI_X9_62 MBEDTLS_OID_ISO_MEMBER_BODIES MBEDTLS_OID_COUNTRY_US \
+ MBEDTLS_OID_ORG_ANSI_X9_62
+
+/*
+ * ISO Identified organization OID parts
+ */
+#define MBEDTLS_OID_ORG_DOD "\x06" /* {dod(6)} */
+#define MBEDTLS_OID_ORG_OIW "\x0e"
+#define MBEDTLS_OID_OIW_SECSIG MBEDTLS_OID_ORG_OIW "\x03"
+#define MBEDTLS_OID_OIW_SECSIG_ALG MBEDTLS_OID_OIW_SECSIG "\x02"
+#define MBEDTLS_OID_OIW_SECSIG_SHA1 MBEDTLS_OID_OIW_SECSIG_ALG "\x1a"
+#define MBEDTLS_OID_ORG_CERTICOM "\x81\x04" /* certicom(132) */
+#define MBEDTLS_OID_CERTICOM MBEDTLS_OID_ISO_IDENTIFIED_ORG MBEDTLS_OID_ORG_CERTICOM
+#define MBEDTLS_OID_ORG_TELETRUST "\x24" /* teletrust(36) */
+#define MBEDTLS_OID_TELETRUST MBEDTLS_OID_ISO_IDENTIFIED_ORG MBEDTLS_OID_ORG_TELETRUST
+
+/*
+ * ISO ITU OID parts
+ */
+#define MBEDTLS_OID_ORGANIZATION "\x01" /* {organization(1)} */
+#define MBEDTLS_OID_ISO_ITU_US_ORG MBEDTLS_OID_ISO_ITU_COUNTRY MBEDTLS_OID_COUNTRY_US MBEDTLS_OID_ORGANIZATION /* {joint-iso-itu-t(2) country(16) us(840) organization(1)} */
+
+#define MBEDTLS_OID_ORG_GOV "\x65" /* {gov(101)} */
+#define MBEDTLS_OID_GOV MBEDTLS_OID_ISO_ITU_US_ORG MBEDTLS_OID_ORG_GOV /* {joint-iso-itu-t(2) country(16) us(840) organization(1) gov(101)} */
+
+#define MBEDTLS_OID_ORG_NETSCAPE "\x86\xF8\x42" /* {netscape(113730)} */
+#define MBEDTLS_OID_NETSCAPE MBEDTLS_OID_ISO_ITU_US_ORG MBEDTLS_OID_ORG_NETSCAPE /* Netscape OID {joint-iso-itu-t(2) country(16) us(840) organization(1) netscape(113730)} */
+
+/* ISO arc for standard certificate and CRL extensions */
+#define MBEDTLS_OID_ID_CE MBEDTLS_OID_ISO_CCITT_DS "\x1D" /**< id-ce OBJECT IDENTIFIER ::= {joint-iso-ccitt(2) ds(5) 29} */
+
+/**
+ * Private Internet Extensions
+ * { iso(1) identified-organization(3) dod(6) internet(1)
+ * security(5) mechanisms(5) pkix(7) }
+ */
+#define MBEDTLS_OID_PKIX MBEDTLS_OID_ISO_IDENTIFIED_ORG MBEDTLS_OID_ORG_DOD "\x01\x05\x05\x07"
+
+/*
+ * Arc for standard naming attributes
+ */
+#define MBEDTLS_OID_AT MBEDTLS_OID_ISO_CCITT_DS "\x04" /**< id-at OBJECT IDENTIFIER ::= {joint-iso-ccitt(2) ds(5) 4} */
+#define MBEDTLS_OID_AT_CN MBEDTLS_OID_AT "\x03" /**< id-at-commonName AttributeType:= {id-at 3} */
+#define MBEDTLS_OID_AT_SUR_NAME MBEDTLS_OID_AT "\x04" /**< id-at-surName AttributeType:= {id-at 4} */
+#define MBEDTLS_OID_AT_SERIAL_NUMBER MBEDTLS_OID_AT "\x05" /**< id-at-serialNumber AttributeType:= {id-at 5} */
+#define MBEDTLS_OID_AT_COUNTRY MBEDTLS_OID_AT "\x06" /**< id-at-countryName AttributeType:= {id-at 6} */
+#define MBEDTLS_OID_AT_LOCALITY MBEDTLS_OID_AT "\x07" /**< id-at-locality AttributeType:= {id-at 7} */
+#define MBEDTLS_OID_AT_STATE MBEDTLS_OID_AT "\x08" /**< id-at-state AttributeType:= {id-at 8} */
+#define MBEDTLS_OID_AT_ORGANIZATION MBEDTLS_OID_AT "\x0A" /**< id-at-organizationName AttributeType:= {id-at 10} */
+#define MBEDTLS_OID_AT_ORG_UNIT MBEDTLS_OID_AT "\x0B" /**< id-at-organizationalUnitName AttributeType:= {id-at 11} */
+#define MBEDTLS_OID_AT_TITLE MBEDTLS_OID_AT "\x0C" /**< id-at-title AttributeType:= {id-at 12} */
+#define MBEDTLS_OID_AT_POSTAL_ADDRESS MBEDTLS_OID_AT "\x10" /**< id-at-postalAddress AttributeType:= {id-at 16} */
+#define MBEDTLS_OID_AT_POSTAL_CODE MBEDTLS_OID_AT "\x11" /**< id-at-postalCode AttributeType:= {id-at 17} */
+#define MBEDTLS_OID_AT_GIVEN_NAME MBEDTLS_OID_AT "\x2A" /**< id-at-givenName AttributeType:= {id-at 42} */
+#define MBEDTLS_OID_AT_INITIALS MBEDTLS_OID_AT "\x2B" /**< id-at-initials AttributeType:= {id-at 43} */
+#define MBEDTLS_OID_AT_GENERATION_QUALIFIER MBEDTLS_OID_AT "\x2C" /**< id-at-generationQualifier AttributeType:= {id-at 44} */
+#define MBEDTLS_OID_AT_UNIQUE_IDENTIFIER MBEDTLS_OID_AT "\x2D" /**< id-at-uniqueIdentifier AttributType:= {id-at 45} */
+#define MBEDTLS_OID_AT_DN_QUALIFIER MBEDTLS_OID_AT "\x2E" /**< id-at-dnQualifier AttributeType:= {id-at 46} */
+#define MBEDTLS_OID_AT_PSEUDONYM MBEDTLS_OID_AT "\x41" /**< id-at-pseudonym AttributeType:= {id-at 65} */
+
+#define MBEDTLS_OID_DOMAIN_COMPONENT "\x09\x92\x26\x89\x93\xF2\x2C\x64\x01\x19" /** id-domainComponent AttributeType:= {itu-t(0) data(9) pss(2342) ucl(19200300) pilot(100) pilotAttributeType(1) domainComponent(25)} */
+
+/*
+ * OIDs for standard certificate extensions
+ */
+#define MBEDTLS_OID_AUTHORITY_KEY_IDENTIFIER MBEDTLS_OID_ID_CE "\x23" /**< id-ce-authorityKeyIdentifier OBJECT IDENTIFIER ::= { id-ce 35 } */
+#define MBEDTLS_OID_SUBJECT_KEY_IDENTIFIER MBEDTLS_OID_ID_CE "\x0E" /**< id-ce-subjectKeyIdentifier OBJECT IDENTIFIER ::= { id-ce 14 } */
+#define MBEDTLS_OID_KEY_USAGE MBEDTLS_OID_ID_CE "\x0F" /**< id-ce-keyUsage OBJECT IDENTIFIER ::= { id-ce 15 } */
+#define MBEDTLS_OID_CERTIFICATE_POLICIES MBEDTLS_OID_ID_CE "\x20" /**< id-ce-certificatePolicies OBJECT IDENTIFIER ::= { id-ce 32 } */
+#define MBEDTLS_OID_POLICY_MAPPINGS MBEDTLS_OID_ID_CE "\x21" /**< id-ce-policyMappings OBJECT IDENTIFIER ::= { id-ce 33 } */
+#define MBEDTLS_OID_SUBJECT_ALT_NAME MBEDTLS_OID_ID_CE "\x11" /**< id-ce-subjectAltName OBJECT IDENTIFIER ::= { id-ce 17 } */
+#define MBEDTLS_OID_ISSUER_ALT_NAME MBEDTLS_OID_ID_CE "\x12" /**< id-ce-issuerAltName OBJECT IDENTIFIER ::= { id-ce 18 } */
+#define MBEDTLS_OID_SUBJECT_DIRECTORY_ATTRS MBEDTLS_OID_ID_CE "\x09" /**< id-ce-subjectDirectoryAttributes OBJECT IDENTIFIER ::= { id-ce 9 } */
+#define MBEDTLS_OID_BASIC_CONSTRAINTS MBEDTLS_OID_ID_CE "\x13" /**< id-ce-basicConstraints OBJECT IDENTIFIER ::= { id-ce 19 } */
+#define MBEDTLS_OID_NAME_CONSTRAINTS MBEDTLS_OID_ID_CE "\x1E" /**< id-ce-nameConstraints OBJECT IDENTIFIER ::= { id-ce 30 } */
+#define MBEDTLS_OID_POLICY_CONSTRAINTS MBEDTLS_OID_ID_CE "\x24" /**< id-ce-policyConstraints OBJECT IDENTIFIER ::= { id-ce 36 } */
+#define MBEDTLS_OID_EXTENDED_KEY_USAGE MBEDTLS_OID_ID_CE "\x25" /**< id-ce-extKeyUsage OBJECT IDENTIFIER ::= { id-ce 37 } */
+#define MBEDTLS_OID_CRL_DISTRIBUTION_POINTS MBEDTLS_OID_ID_CE "\x1F" /**< id-ce-cRLDistributionPoints OBJECT IDENTIFIER ::= { id-ce 31 } */
+#define MBEDTLS_OID_INIHIBIT_ANYPOLICY MBEDTLS_OID_ID_CE "\x36" /**< id-ce-inhibitAnyPolicy OBJECT IDENTIFIER ::= { id-ce 54 } */
+#define MBEDTLS_OID_FRESHEST_CRL MBEDTLS_OID_ID_CE "\x2E" /**< id-ce-freshestCRL OBJECT IDENTIFIER ::= { id-ce 46 } */
+
+/*
+ * Netscape certificate extensions
+ */
+#define MBEDTLS_OID_NS_CERT MBEDTLS_OID_NETSCAPE "\x01"
+#define MBEDTLS_OID_NS_CERT_TYPE MBEDTLS_OID_NS_CERT "\x01"
+#define MBEDTLS_OID_NS_BASE_URL MBEDTLS_OID_NS_CERT "\x02"
+#define MBEDTLS_OID_NS_REVOCATION_URL MBEDTLS_OID_NS_CERT "\x03"
+#define MBEDTLS_OID_NS_CA_REVOCATION_URL MBEDTLS_OID_NS_CERT "\x04"
+#define MBEDTLS_OID_NS_RENEWAL_URL MBEDTLS_OID_NS_CERT "\x07"
+#define MBEDTLS_OID_NS_CA_POLICY_URL MBEDTLS_OID_NS_CERT "\x08"
+#define MBEDTLS_OID_NS_SSL_SERVER_NAME MBEDTLS_OID_NS_CERT "\x0C"
+#define MBEDTLS_OID_NS_COMMENT MBEDTLS_OID_NS_CERT "\x0D"
+#define MBEDTLS_OID_NS_DATA_TYPE MBEDTLS_OID_NETSCAPE "\x02"
+#define MBEDTLS_OID_NS_CERT_SEQUENCE MBEDTLS_OID_NS_DATA_TYPE "\x05"
+
+/*
+ * OIDs for CRL extensions
+ */
+#define MBEDTLS_OID_PRIVATE_KEY_USAGE_PERIOD MBEDTLS_OID_ID_CE "\x10"
+#define MBEDTLS_OID_CRL_NUMBER MBEDTLS_OID_ID_CE "\x14" /**< id-ce-cRLNumber OBJECT IDENTIFIER ::= { id-ce 20 } */
+
+/*
+ * X.509 v3 Extended key usage OIDs
+ */
+#define MBEDTLS_OID_ANY_EXTENDED_KEY_USAGE MBEDTLS_OID_EXTENDED_KEY_USAGE "\x00" /**< anyExtendedKeyUsage OBJECT IDENTIFIER ::= { id-ce-extKeyUsage 0 } */
+
+#define MBEDTLS_OID_KP MBEDTLS_OID_PKIX "\x03" /**< id-kp OBJECT IDENTIFIER ::= { id-pkix 3 } */
+#define MBEDTLS_OID_SERVER_AUTH MBEDTLS_OID_KP "\x01" /**< id-kp-serverAuth OBJECT IDENTIFIER ::= { id-kp 1 } */
+#define MBEDTLS_OID_CLIENT_AUTH MBEDTLS_OID_KP "\x02" /**< id-kp-clientAuth OBJECT IDENTIFIER ::= { id-kp 2 } */
+#define MBEDTLS_OID_CODE_SIGNING MBEDTLS_OID_KP "\x03" /**< id-kp-codeSigning OBJECT IDENTIFIER ::= { id-kp 3 } */
+#define MBEDTLS_OID_EMAIL_PROTECTION MBEDTLS_OID_KP "\x04" /**< id-kp-emailProtection OBJECT IDENTIFIER ::= { id-kp 4 } */
+#define MBEDTLS_OID_TIME_STAMPING MBEDTLS_OID_KP "\x08" /**< id-kp-timeStamping OBJECT IDENTIFIER ::= { id-kp 8 } */
+#define MBEDTLS_OID_OCSP_SIGNING MBEDTLS_OID_KP "\x09" /**< id-kp-OCSPSigning OBJECT IDENTIFIER ::= { id-kp 9 } */
+
+/*
+ * PKCS definition OIDs
+ */
+
+#define MBEDTLS_OID_PKCS MBEDTLS_OID_RSA_COMPANY "\x01" /**< pkcs OBJECT IDENTIFIER ::= { iso(1) member-body(2) us(840) rsadsi(113549) 1 } */
+#define MBEDTLS_OID_PKCS1 MBEDTLS_OID_PKCS "\x01" /**< pkcs-1 OBJECT IDENTIFIER ::= { iso(1) member-body(2) us(840) rsadsi(113549) pkcs(1) 1 } */
+#define MBEDTLS_OID_PKCS5 MBEDTLS_OID_PKCS "\x05" /**< pkcs-5 OBJECT IDENTIFIER ::= { iso(1) member-body(2) us(840) rsadsi(113549) pkcs(1) 5 } */
+#define MBEDTLS_OID_PKCS9 MBEDTLS_OID_PKCS "\x09" /**< pkcs-9 OBJECT IDENTIFIER ::= { iso(1) member-body(2) us(840) rsadsi(113549) pkcs(1) 9 } */
+#define MBEDTLS_OID_PKCS12 MBEDTLS_OID_PKCS "\x0c" /**< pkcs-12 OBJECT IDENTIFIER ::= { iso(1) member-body(2) us(840) rsadsi(113549) pkcs(1) 12 } */
+
+/*
+ * PKCS#1 OIDs
+ */
+#define MBEDTLS_OID_PKCS1_RSA MBEDTLS_OID_PKCS1 "\x01" /**< rsaEncryption OBJECT IDENTIFIER ::= { pkcs-1 1 } */
+#define MBEDTLS_OID_PKCS1_MD2 MBEDTLS_OID_PKCS1 "\x02" /**< md2WithRSAEncryption ::= { pkcs-1 2 } */
+#define MBEDTLS_OID_PKCS1_MD4 MBEDTLS_OID_PKCS1 "\x03" /**< md4WithRSAEncryption ::= { pkcs-1 3 } */
+#define MBEDTLS_OID_PKCS1_MD5 MBEDTLS_OID_PKCS1 "\x04" /**< md5WithRSAEncryption ::= { pkcs-1 4 } */
+#define MBEDTLS_OID_PKCS1_SHA1 MBEDTLS_OID_PKCS1 "\x05" /**< sha1WithRSAEncryption ::= { pkcs-1 5 } */
+#define MBEDTLS_OID_PKCS1_SHA224 MBEDTLS_OID_PKCS1 "\x0e" /**< sha224WithRSAEncryption ::= { pkcs-1 14 } */
+#define MBEDTLS_OID_PKCS1_SHA256 MBEDTLS_OID_PKCS1 "\x0b" /**< sha256WithRSAEncryption ::= { pkcs-1 11 } */
+#define MBEDTLS_OID_PKCS1_SHA384 MBEDTLS_OID_PKCS1 "\x0c" /**< sha384WithRSAEncryption ::= { pkcs-1 12 } */
+#define MBEDTLS_OID_PKCS1_SHA512 MBEDTLS_OID_PKCS1 "\x0d" /**< sha512WithRSAEncryption ::= { pkcs-1 13 } */
+
+#define MBEDTLS_OID_RSA_SHA_OBS "\x2B\x0E\x03\x02\x1D"
+
+#define MBEDTLS_OID_PKCS9_EMAIL MBEDTLS_OID_PKCS9 "\x01" /**< emailAddress AttributeType ::= { pkcs-9 1 } */
+
+/* RFC 4055 */
+#define MBEDTLS_OID_RSASSA_PSS MBEDTLS_OID_PKCS1 "\x0a" /**< id-RSASSA-PSS ::= { pkcs-1 10 } */
+#define MBEDTLS_OID_MGF1 MBEDTLS_OID_PKCS1 "\x08" /**< id-mgf1 ::= { pkcs-1 8 } */
+
+/*
+ * Digest algorithms
+ */
+#define MBEDTLS_OID_DIGEST_ALG_MD2 MBEDTLS_OID_RSA_COMPANY "\x02\x02" /**< id-mbedtls_md2 OBJECT IDENTIFIER ::= { iso(1) member-body(2) us(840) rsadsi(113549) digestAlgorithm(2) 2 } */
+#define MBEDTLS_OID_DIGEST_ALG_MD4 MBEDTLS_OID_RSA_COMPANY "\x02\x04" /**< id-mbedtls_md4 OBJECT IDENTIFIER ::= { iso(1) member-body(2) us(840) rsadsi(113549) digestAlgorithm(2) 4 } */
+#define MBEDTLS_OID_DIGEST_ALG_MD5 MBEDTLS_OID_RSA_COMPANY "\x02\x05" /**< id-mbedtls_md5 OBJECT IDENTIFIER ::= { iso(1) member-body(2) us(840) rsadsi(113549) digestAlgorithm(2) 5 } */
+#define MBEDTLS_OID_DIGEST_ALG_SHA1 MBEDTLS_OID_ISO_IDENTIFIED_ORG MBEDTLS_OID_OIW_SECSIG_SHA1 /**< id-mbedtls_sha1 OBJECT IDENTIFIER ::= { iso(1) identified-organization(3) oiw(14) secsig(3) algorithms(2) 26 } */
+#define MBEDTLS_OID_DIGEST_ALG_SHA224 MBEDTLS_OID_GOV "\x03\x04\x02\x04" /**< id-sha224 OBJECT IDENTIFIER ::= { joint-iso-itu-t(2) country(16) us(840) organization(1) gov(101) csor(3) nistalgorithm(4) hashalgs(2) 4 } */
+#define MBEDTLS_OID_DIGEST_ALG_SHA256 MBEDTLS_OID_GOV "\x03\x04\x02\x01" /**< id-mbedtls_sha256 OBJECT IDENTIFIER ::= { joint-iso-itu-t(2) country(16) us(840) organization(1) gov(101) csor(3) nistalgorithm(4) hashalgs(2) 1 } */
+
+#define MBEDTLS_OID_DIGEST_ALG_SHA384 MBEDTLS_OID_GOV "\x03\x04\x02\x02" /**< id-sha384 OBJECT IDENTIFIER ::= { joint-iso-itu-t(2) country(16) us(840) organization(1) gov(101) csor(3) nistalgorithm(4) hashalgs(2) 2 } */
+
+#define MBEDTLS_OID_DIGEST_ALG_SHA512 MBEDTLS_OID_GOV "\x03\x04\x02\x03" /**< id-mbedtls_sha512 OBJECT IDENTIFIER ::= { joint-iso-itu-t(2) country(16) us(840) organization(1) gov(101) csor(3) nistalgorithm(4) hashalgs(2) 3 } */
+
+#define MBEDTLS_OID_HMAC_SHA1 MBEDTLS_OID_RSA_COMPANY "\x02\x07" /**< id-hmacWithSHA1 OBJECT IDENTIFIER ::= { iso(1) member-body(2) us(840) rsadsi(113549) digestAlgorithm(2) 7 } */
+
+/*
+ * Encryption algorithms
+ */
+#define MBEDTLS_OID_DES_CBC MBEDTLS_OID_ISO_IDENTIFIED_ORG MBEDTLS_OID_OIW_SECSIG_ALG "\x07" /**< desCBC OBJECT IDENTIFIER ::= { iso(1) identified-organization(3) oiw(14) secsig(3) algorithms(2) 7 } */
+#define MBEDTLS_OID_DES_EDE3_CBC MBEDTLS_OID_RSA_COMPANY "\x03\x07" /**< des-ede3-cbc OBJECT IDENTIFIER ::= { iso(1) member-body(2) -- us(840) rsadsi(113549) encryptionAlgorithm(3) 7 } */
+
+/*
+ * PKCS#5 OIDs
+ */
+#define MBEDTLS_OID_PKCS5_PBKDF2 MBEDTLS_OID_PKCS5 "\x0c" /**< id-PBKDF2 OBJECT IDENTIFIER ::= {pkcs-5 12} */
+#define MBEDTLS_OID_PKCS5_PBES2 MBEDTLS_OID_PKCS5 "\x0d" /**< id-PBES2 OBJECT IDENTIFIER ::= {pkcs-5 13} */
+#define MBEDTLS_OID_PKCS5_PBMAC1 MBEDTLS_OID_PKCS5 "\x0e" /**< id-PBMAC1 OBJECT IDENTIFIER ::= {pkcs-5 14} */
+
+/*
+ * PKCS#5 PBES1 algorithms
+ */
+#define MBEDTLS_OID_PKCS5_PBE_MD2_DES_CBC MBEDTLS_OID_PKCS5 "\x01" /**< pbeWithMD2AndDES-CBC OBJECT IDENTIFIER ::= {pkcs-5 1} */
+#define MBEDTLS_OID_PKCS5_PBE_MD2_RC2_CBC MBEDTLS_OID_PKCS5 "\x04" /**< pbeWithMD2AndRC2-CBC OBJECT IDENTIFIER ::= {pkcs-5 4} */
+#define MBEDTLS_OID_PKCS5_PBE_MD5_DES_CBC MBEDTLS_OID_PKCS5 "\x03" /**< pbeWithMD5AndDES-CBC OBJECT IDENTIFIER ::= {pkcs-5 3} */
+#define MBEDTLS_OID_PKCS5_PBE_MD5_RC2_CBC MBEDTLS_OID_PKCS5 "\x06" /**< pbeWithMD5AndRC2-CBC OBJECT IDENTIFIER ::= {pkcs-5 6} */
+#define MBEDTLS_OID_PKCS5_PBE_SHA1_DES_CBC MBEDTLS_OID_PKCS5 "\x0a" /**< pbeWithSHA1AndDES-CBC OBJECT IDENTIFIER ::= {pkcs-5 10} */
+#define MBEDTLS_OID_PKCS5_PBE_SHA1_RC2_CBC MBEDTLS_OID_PKCS5 "\x0b" /**< pbeWithSHA1AndRC2-CBC OBJECT IDENTIFIER ::= {pkcs-5 11} */
+
+/*
+ * PKCS#8 OIDs
+ */
+#define MBEDTLS_OID_PKCS9_CSR_EXT_REQ MBEDTLS_OID_PKCS9 "\x0e" /**< extensionRequest OBJECT IDENTIFIER ::= {pkcs-9 14} */
+
+/*
+ * PKCS#12 PBE OIDs
+ */
+#define MBEDTLS_OID_PKCS12_PBE MBEDTLS_OID_PKCS12 "\x01" /**< pkcs-12PbeIds OBJECT IDENTIFIER ::= {pkcs-12 1} */
+
+#define MBEDTLS_OID_PKCS12_PBE_SHA1_RC4_128 MBEDTLS_OID_PKCS12_PBE "\x01" /**< pbeWithSHAAnd128BitRC4 OBJECT IDENTIFIER ::= {pkcs-12PbeIds 1} */
+#define MBEDTLS_OID_PKCS12_PBE_SHA1_RC4_40 MBEDTLS_OID_PKCS12_PBE "\x02" /**< pbeWithSHAAnd40BitRC4 OBJECT IDENTIFIER ::= {pkcs-12PbeIds 2} */
+#define MBEDTLS_OID_PKCS12_PBE_SHA1_DES3_EDE_CBC MBEDTLS_OID_PKCS12_PBE "\x03" /**< pbeWithSHAAnd3-KeyTripleDES-CBC OBJECT IDENTIFIER ::= {pkcs-12PbeIds 3} */
+#define MBEDTLS_OID_PKCS12_PBE_SHA1_DES2_EDE_CBC MBEDTLS_OID_PKCS12_PBE "\x04" /**< pbeWithSHAAnd2-KeyTripleDES-CBC OBJECT IDENTIFIER ::= {pkcs-12PbeIds 4} */
+#define MBEDTLS_OID_PKCS12_PBE_SHA1_RC2_128_CBC MBEDTLS_OID_PKCS12_PBE "\x05" /**< pbeWithSHAAnd128BitRC2-CBC OBJECT IDENTIFIER ::= {pkcs-12PbeIds 5} */
+#define MBEDTLS_OID_PKCS12_PBE_SHA1_RC2_40_CBC MBEDTLS_OID_PKCS12_PBE "\x06" /**< pbeWithSHAAnd40BitRC2-CBC OBJECT IDENTIFIER ::= {pkcs-12PbeIds 6} */
+
+/*
+ * EC key algorithms from RFC 5480
+ */
+
+/* id-ecPublicKey OBJECT IDENTIFIER ::= {
+ * iso(1) member-body(2) us(840) ansi-X9-62(10045) keyType(2) 1 } */
+#define MBEDTLS_OID_EC_ALG_UNRESTRICTED MBEDTLS_OID_ANSI_X9_62 "\x02\01"
+
+/* id-ecDH OBJECT IDENTIFIER ::= {
+ * iso(1) identified-organization(3) certicom(132)
+ * schemes(1) ecdh(12) } */
+#define MBEDTLS_OID_EC_ALG_ECDH MBEDTLS_OID_CERTICOM "\x01\x0c"
+
+/*
+ * ECParameters namedCurve identifiers, from RFC 5480, RFC 5639, and SEC2
+ */
+
+/* secp192r1 OBJECT IDENTIFIER ::= {
+ * iso(1) member-body(2) us(840) ansi-X9-62(10045) curves(3) prime(1) 1 } */
+#define MBEDTLS_OID_EC_GRP_SECP192R1 MBEDTLS_OID_ANSI_X9_62 "\x03\x01\x01"
+
+/* secp224r1 OBJECT IDENTIFIER ::= {
+ * iso(1) identified-organization(3) certicom(132) curve(0) 33 } */
+#define MBEDTLS_OID_EC_GRP_SECP224R1 MBEDTLS_OID_CERTICOM "\x00\x21"
+
+/* secp256r1 OBJECT IDENTIFIER ::= {
+ * iso(1) member-body(2) us(840) ansi-X9-62(10045) curves(3) prime(1) 7 } */
+#define MBEDTLS_OID_EC_GRP_SECP256R1 MBEDTLS_OID_ANSI_X9_62 "\x03\x01\x07"
+
+/* secp384r1 OBJECT IDENTIFIER ::= {
+ * iso(1) identified-organization(3) certicom(132) curve(0) 34 } */
+#define MBEDTLS_OID_EC_GRP_SECP384R1 MBEDTLS_OID_CERTICOM "\x00\x22"
+
+/* secp521r1 OBJECT IDENTIFIER ::= {
+ * iso(1) identified-organization(3) certicom(132) curve(0) 35 } */
+#define MBEDTLS_OID_EC_GRP_SECP521R1 MBEDTLS_OID_CERTICOM "\x00\x23"
+
+/* secp192k1 OBJECT IDENTIFIER ::= {
+ * iso(1) identified-organization(3) certicom(132) curve(0) 31 } */
+#define MBEDTLS_OID_EC_GRP_SECP192K1 MBEDTLS_OID_CERTICOM "\x00\x1f"
+
+/* secp224k1 OBJECT IDENTIFIER ::= {
+ * iso(1) identified-organization(3) certicom(132) curve(0) 32 } */
+#define MBEDTLS_OID_EC_GRP_SECP224K1 MBEDTLS_OID_CERTICOM "\x00\x20"
+
+/* secp256k1 OBJECT IDENTIFIER ::= {
+ * iso(1) identified-organization(3) certicom(132) curve(0) 10 } */
+#define MBEDTLS_OID_EC_GRP_SECP256K1 MBEDTLS_OID_CERTICOM "\x00\x0a"
+
+/* RFC 5639 4.1
+ * ecStdCurvesAndGeneration OBJECT IDENTIFIER::= {iso(1)
+ * identified-organization(3) teletrust(36) algorithm(3) signature-
+ * algorithm(3) ecSign(2) 8}
+ * ellipticCurve OBJECT IDENTIFIER ::= {ecStdCurvesAndGeneration 1}
+ * versionOne OBJECT IDENTIFIER ::= {ellipticCurve 1} */
+#define MBEDTLS_OID_EC_BRAINPOOL_V1 MBEDTLS_OID_TELETRUST "\x03\x03\x02\x08\x01\x01"
+
+/* brainpoolP256r1 OBJECT IDENTIFIER ::= {versionOne 7} */
+#define MBEDTLS_OID_EC_GRP_BP256R1 MBEDTLS_OID_EC_BRAINPOOL_V1 "\x07"
+
+/* brainpoolP384r1 OBJECT IDENTIFIER ::= {versionOne 11} */
+#define MBEDTLS_OID_EC_GRP_BP384R1 MBEDTLS_OID_EC_BRAINPOOL_V1 "\x0B"
+
+/* brainpoolP512r1 OBJECT IDENTIFIER ::= {versionOne 13} */
+#define MBEDTLS_OID_EC_GRP_BP512R1 MBEDTLS_OID_EC_BRAINPOOL_V1 "\x0D"
+
+/*
+ * SEC1 C.1
+ *
+ * prime-field OBJECT IDENTIFIER ::= { id-fieldType 1 }
+ * id-fieldType OBJECT IDENTIFIER ::= { ansi-X9-62 fieldType(1)}
+ */
+#define MBEDTLS_OID_ANSI_X9_62_FIELD_TYPE MBEDTLS_OID_ANSI_X9_62 "\x01"
+#define MBEDTLS_OID_ANSI_X9_62_PRIME_FIELD MBEDTLS_OID_ANSI_X9_62_FIELD_TYPE "\x01"
+
+/*
+ * ECDSA signature identifiers, from RFC 5480
+ */
+#define MBEDTLS_OID_ANSI_X9_62_SIG MBEDTLS_OID_ANSI_X9_62 "\x04" /* signatures(4) */
+#define MBEDTLS_OID_ANSI_X9_62_SIG_SHA2 MBEDTLS_OID_ANSI_X9_62_SIG "\x03" /* ecdsa-with-SHA2(3) */
+
+/* ecdsa-with-SHA1 OBJECT IDENTIFIER ::= {
+ * iso(1) member-body(2) us(840) ansi-X9-62(10045) signatures(4) 1 } */
+#define MBEDTLS_OID_ECDSA_SHA1 MBEDTLS_OID_ANSI_X9_62_SIG "\x01"
+
+/* ecdsa-with-SHA224 OBJECT IDENTIFIER ::= {
+ * iso(1) member-body(2) us(840) ansi-X9-62(10045) signatures(4)
+ * ecdsa-with-SHA2(3) 1 } */
+#define MBEDTLS_OID_ECDSA_SHA224 MBEDTLS_OID_ANSI_X9_62_SIG_SHA2 "\x01"
+
+/* ecdsa-with-SHA256 OBJECT IDENTIFIER ::= {
+ * iso(1) member-body(2) us(840) ansi-X9-62(10045) signatures(4)
+ * ecdsa-with-SHA2(3) 2 } */
+#define MBEDTLS_OID_ECDSA_SHA256 MBEDTLS_OID_ANSI_X9_62_SIG_SHA2 "\x02"
+
+/* ecdsa-with-SHA384 OBJECT IDENTIFIER ::= {
+ * iso(1) member-body(2) us(840) ansi-X9-62(10045) signatures(4)
+ * ecdsa-with-SHA2(3) 3 } */
+#define MBEDTLS_OID_ECDSA_SHA384 MBEDTLS_OID_ANSI_X9_62_SIG_SHA2 "\x03"
+
+/* ecdsa-with-SHA512 OBJECT IDENTIFIER ::= {
+ * iso(1) member-body(2) us(840) ansi-X9-62(10045) signatures(4)
+ * ecdsa-with-SHA2(3) 4 } */
+#define MBEDTLS_OID_ECDSA_SHA512 MBEDTLS_OID_ANSI_X9_62_SIG_SHA2 "\x04"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * \brief Base OID descriptor structure
+ */
+typedef struct {
+ const char *asn1; /*!< OID ASN.1 representation */
+ size_t asn1_len; /*!< length of asn1 */
+ const char *name; /*!< official name (e.g. from RFC) */
+ const char *description; /*!< human friendly description */
+} mbedtls_oid_descriptor_t;
+
+/**
+ * \brief Translate an ASN.1 OID into its numeric representation
+ * (e.g. "\x2A\x86\x48\x86\xF7\x0D" into "1.2.840.113549")
+ *
+ * \param buf buffer to put representation in
+ * \param size size of the buffer
+ * \param oid OID to translate
+ *
+ * \return Length of the string written (excluding final NULL) or
+ * MBEDTLS_ERR_OID_BUF_TOO_SMALL in case of error
+ */
+int mbedtls_oid_get_numeric_string( char *buf, size_t size, const mbedtls_asn1_buf *oid );
+
+#if defined(MBEDTLS_X509_USE_C) || defined(MBEDTLS_X509_CREATE_C)
+/**
+ * \brief Translate an X.509 extension OID into local values
+ *
+ * \param oid OID to use
+ * \param ext_type place to store the extension type
+ *
+ * \return 0 if successful, or MBEDTLS_ERR_OID_NOT_FOUND
+ */
+int mbedtls_oid_get_x509_ext_type( const mbedtls_asn1_buf *oid, int *ext_type );
+#endif
+
+/**
+ * \brief Translate an X.509 attribute type OID into the short name
+ * (e.g. the OID for an X520 Common Name into "CN")
+ *
+ * \param oid OID to use
+ * \param short_name place to store the string pointer
+ *
+ * \return 0 if successful, or MBEDTLS_ERR_OID_NOT_FOUND
+ */
+int mbedtls_oid_get_attr_short_name( const mbedtls_asn1_buf *oid, const char **short_name );
+
+/**
+ * \brief Translate PublicKeyAlgorithm OID into pk_type
+ *
+ * \param oid OID to use
+ * \param pk_alg place to store public key algorithm
+ *
+ * \return 0 if successful, or MBEDTLS_ERR_OID_NOT_FOUND
+ */
+int mbedtls_oid_get_pk_alg( const mbedtls_asn1_buf *oid, mbedtls_pk_type_t *pk_alg );
+
+/**
+ * \brief Translate pk_type into PublicKeyAlgorithm OID
+ *
+ * \param pk_alg Public key type to look for
+ * \param oid place to store ASN.1 OID string pointer
+ * \param olen length of the OID
+ *
+ * \return 0 if successful, or MBEDTLS_ERR_OID_NOT_FOUND
+ */
+int mbedtls_oid_get_oid_by_pk_alg( mbedtls_pk_type_t pk_alg,
+ const char **oid, size_t *olen );
+
+#if defined(MBEDTLS_ECP_C)
+/**
+ * \brief Translate NamedCurve OID into an EC group identifier
+ *
+ * \param oid OID to use
+ * \param grp_id place to store group id
+ *
+ * \return 0 if successful, or MBEDTLS_ERR_OID_NOT_FOUND
+ */
+int mbedtls_oid_get_ec_grp( const mbedtls_asn1_buf *oid, mbedtls_ecp_group_id *grp_id );
+
+/**
+ * \brief Translate EC group identifier into NamedCurve OID
+ *
+ * \param grp_id EC group identifier
+ * \param oid place to store ASN.1 OID string pointer
+ * \param olen length of the OID
+ *
+ * \return 0 if successful, or MBEDTLS_ERR_OID_NOT_FOUND
+ */
+int mbedtls_oid_get_oid_by_ec_grp( mbedtls_ecp_group_id grp_id,
+ const char **oid, size_t *olen );
+#endif /* MBEDTLS_ECP_C */
+
+#if defined(MBEDTLS_MD_C)
+/**
+ * \brief Translate SignatureAlgorithm OID into md_type and pk_type
+ *
+ * \param oid OID to use
+ * \param md_alg place to store message digest algorithm
+ * \param pk_alg place to store public key algorithm
+ *
+ * \return 0 if successful, or MBEDTLS_ERR_OID_NOT_FOUND
+ */
+int mbedtls_oid_get_sig_alg( const mbedtls_asn1_buf *oid,
+ mbedtls_md_type_t *md_alg, mbedtls_pk_type_t *pk_alg );
+
+/**
+ * \brief Translate SignatureAlgorithm OID into description
+ *
+ * \param oid OID to use
+ * \param desc place to store string pointer
+ *
+ * \return 0 if successful, or MBEDTLS_ERR_OID_NOT_FOUND
+ */
+int mbedtls_oid_get_sig_alg_desc( const mbedtls_asn1_buf *oid, const char **desc );
+
+/**
+ * \brief Translate md_type and pk_type into SignatureAlgorithm OID
+ *
+ * \param md_alg message digest algorithm
+ * \param pk_alg public key algorithm
+ * \param oid place to store ASN.1 OID string pointer
+ * \param olen length of the OID
+ *
+ * \return 0 if successful, or MBEDTLS_ERR_OID_NOT_FOUND
+ */
+int mbedtls_oid_get_oid_by_sig_alg( mbedtls_pk_type_t pk_alg, mbedtls_md_type_t md_alg,
+ const char **oid, size_t *olen );
+
+/**
+ * \brief Translate hash algorithm OID into md_type
+ *
+ * \param oid OID to use
+ * \param md_alg place to store message digest algorithm
+ *
+ * \return 0 if successful, or MBEDTLS_ERR_OID_NOT_FOUND
+ */
+int mbedtls_oid_get_md_alg( const mbedtls_asn1_buf *oid, mbedtls_md_type_t *md_alg );
+#endif /* MBEDTLS_MD_C */
+
+/**
+ * \brief Translate Extended Key Usage OID into description
+ *
+ * \param oid OID to use
+ * \param desc place to store string pointer
+ *
+ * \return 0 if successful, or MBEDTLS_ERR_OID_NOT_FOUND
+ */
+int mbedtls_oid_get_extended_key_usage( const mbedtls_asn1_buf *oid, const char **desc );
+
+/**
+ * \brief Translate md_type into hash algorithm OID
+ *
+ * \param md_alg message digest algorithm
+ * \param oid place to store ASN.1 OID string pointer
+ * \param olen length of the OID
+ *
+ * \return 0 if successful, or MBEDTLS_ERR_OID_NOT_FOUND
+ */
+int mbedtls_oid_get_oid_by_md( mbedtls_md_type_t md_alg, const char **oid, size_t *olen );
+
+#if defined(MBEDTLS_CIPHER_C)
+/**
+ * \brief Translate encryption algorithm OID into cipher_type
+ *
+ * \param oid OID to use
+ * \param cipher_alg place to store cipher algorithm
+ *
+ * \return 0 if successful, or MBEDTLS_ERR_OID_NOT_FOUND
+ */
+int mbedtls_oid_get_cipher_alg( const mbedtls_asn1_buf *oid, mbedtls_cipher_type_t *cipher_alg );
+#endif /* MBEDTLS_CIPHER_C */
+
+#if defined(MBEDTLS_PKCS12_C)
+/**
+ * \brief Translate PKCS#12 PBE algorithm OID into md_type and
+ * cipher_type
+ *
+ * \param oid OID to use
+ * \param md_alg place to store message digest algorithm
+ * \param cipher_alg place to store cipher algorithm
+ *
+ * \return 0 if successful, or MBEDTLS_ERR_OID_NOT_FOUND
+ */
+int mbedtls_oid_get_pkcs12_pbe_alg( const mbedtls_asn1_buf *oid, mbedtls_md_type_t *md_alg,
+ mbedtls_cipher_type_t *cipher_alg );
+#endif /* MBEDTLS_PKCS12_C */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* oid.h */
diff --git a/backport/compat/verification/mbedtls/pk.h b/backport/compat/verification/mbedtls/pk.h
new file mode 100644
index 00000000..9aac7e2a
--- /dev/null
+++ b/backport/compat/verification/mbedtls/pk.h
@@ -0,0 +1,618 @@
+/**
+ * \file pk.h
+ *
+ * \brief Public Key abstraction layer
+ *
+ * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
+ * SPDX-License-Identifier: GPL-2.0
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * This file is part of mbed TLS (https://tls.mbed.org)
+ */
+
+#ifndef MBEDTLS_PK_H
+#define MBEDTLS_PK_H
+
+#if !defined(MBEDTLS_CONFIG_FILE)
+#include "config.h"
+#else
+#include MBEDTLS_CONFIG_FILE
+#endif
+
+#include "md.h"
+
+#if defined(MBEDTLS_RSA_C)
+#include "rsa.h"
+#endif
+
+#if defined(MBEDTLS_ECP_C)
+#include "ecp.h"
+#endif
+
+#if defined(MBEDTLS_ECDSA_C)
+#include "ecdsa.h"
+#endif
+
+#if ( defined(__ARMCC_VERSION) || defined(_MSC_VER) ) && \
+ !defined(inline) && !defined(__cplusplus)
+#define inline __inline
+#endif
+
+#define MBEDTLS_ERR_PK_ALLOC_FAILED -0x3F80 /**< Memory allocation failed. */
+#define MBEDTLS_ERR_PK_TYPE_MISMATCH -0x3F00 /**< Type mismatch, eg attempt to encrypt with an ECDSA key */
+#define MBEDTLS_ERR_PK_BAD_INPUT_DATA -0x3E80 /**< Bad input parameters to function. */
+#define MBEDTLS_ERR_PK_FILE_IO_ERROR -0x3E00 /**< Read/write of file failed. */
+#define MBEDTLS_ERR_PK_KEY_INVALID_VERSION -0x3D80 /**< Unsupported key version */
+#define MBEDTLS_ERR_PK_KEY_INVALID_FORMAT -0x3D00 /**< Invalid key tag or value. */
+#define MBEDTLS_ERR_PK_UNKNOWN_PK_ALG -0x3C80 /**< Key algorithm is unsupported (only RSA and EC are supported). */
+#define MBEDTLS_ERR_PK_PASSWORD_REQUIRED -0x3C00 /**< Private key password can't be empty. */
+#define MBEDTLS_ERR_PK_PASSWORD_MISMATCH -0x3B80 /**< Given private key password does not allow for correct decryption. */
+#define MBEDTLS_ERR_PK_INVALID_PUBKEY -0x3B00 /**< The pubkey tag or value is invalid (only RSA and EC are supported). */
+#define MBEDTLS_ERR_PK_INVALID_ALG -0x3A80 /**< The algorithm tag or value is invalid. */
+#define MBEDTLS_ERR_PK_UNKNOWN_NAMED_CURVE -0x3A00 /**< Elliptic curve is unsupported (only NIST curves are supported). */
+#define MBEDTLS_ERR_PK_FEATURE_UNAVAILABLE -0x3980 /**< Unavailable feature, e.g. RSA disabled for RSA key. */
+#define MBEDTLS_ERR_PK_SIG_LEN_MISMATCH -0x3900 /**< The signature is valid but its length is less than expected. */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * \brief Public key types
+ */
+typedef enum {
+ MBEDTLS_PK_NONE=0,
+ MBEDTLS_PK_RSA,
+ MBEDTLS_PK_ECKEY,
+ MBEDTLS_PK_ECKEY_DH,
+ MBEDTLS_PK_ECDSA,
+ MBEDTLS_PK_RSA_ALT,
+ MBEDTLS_PK_RSASSA_PSS,
+} mbedtls_pk_type_t;
+
+/**
+ * \brief Options for RSASSA-PSS signature verification.
+ * See \c mbedtls_rsa_rsassa_pss_verify_ext()
+ */
+typedef struct
+{
+ mbedtls_md_type_t mgf1_hash_id;
+ int expected_salt_len;
+
+} mbedtls_pk_rsassa_pss_options;
+
+/**
+ * \brief Types for interfacing with the debug module
+ */
+typedef enum
+{
+ MBEDTLS_PK_DEBUG_NONE = 0,
+ MBEDTLS_PK_DEBUG_MPI,
+ MBEDTLS_PK_DEBUG_ECP,
+} mbedtls_pk_debug_type;
+
+/**
+ * \brief Item to send to the debug module
+ */
+typedef struct
+{
+ mbedtls_pk_debug_type type;
+ const char *name;
+ void *value;
+} mbedtls_pk_debug_item;
+
+/** Maximum number of item send for debugging, plus 1 */
+#define MBEDTLS_PK_DEBUG_MAX_ITEMS 3
+
+/**
+ * \brief Public key information and operations
+ */
+typedef struct mbedtls_pk_info_t mbedtls_pk_info_t;
+
+/**
+ * \brief Public key container
+ */
+typedef struct
+{
+ const mbedtls_pk_info_t * pk_info; /**< Public key informations */
+ void * pk_ctx; /**< Underlying public key context */
+} mbedtls_pk_context;
+
+#if defined(MBEDTLS_RSA_C)
+/**
+ * Quick access to an RSA context inside a PK context.
+ *
+ * \warning You must make sure the PK context actually holds an RSA context
+ * before using this function!
+ */
+static inline mbedtls_rsa_context *mbedtls_pk_rsa( const mbedtls_pk_context pk )
+{
+ return( (mbedtls_rsa_context *) (pk).pk_ctx );
+}
+#endif /* MBEDTLS_RSA_C */
+
+#if defined(MBEDTLS_ECP_C)
+/**
+ * Quick access to an EC context inside a PK context.
+ *
+ * \warning You must make sure the PK context actually holds an EC context
+ * before using this function!
+ */
+static inline mbedtls_ecp_keypair *mbedtls_pk_ec( const mbedtls_pk_context pk )
+{
+ return( (mbedtls_ecp_keypair *) (pk).pk_ctx );
+}
+#endif /* MBEDTLS_ECP_C */
+
+#if defined(MBEDTLS_PK_RSA_ALT_SUPPORT)
+/**
+ * \brief Types for RSA-alt abstraction
+ */
+typedef int (*mbedtls_pk_rsa_alt_decrypt_func)( void *ctx, int mode, size_t *olen,
+ const unsigned char *input, unsigned char *output,
+ size_t output_max_len );
+typedef int (*mbedtls_pk_rsa_alt_sign_func)( void *ctx,
+ int (*f_rng)(void *, unsigned char *, size_t), void *p_rng,
+ int mode, mbedtls_md_type_t md_alg, unsigned int hashlen,
+ const unsigned char *hash, unsigned char *sig );
+typedef size_t (*mbedtls_pk_rsa_alt_key_len_func)( void *ctx );
+#endif /* MBEDTLS_PK_RSA_ALT_SUPPORT */
+
+/**
+ * \brief Return information associated with the given PK type
+ *
+ * \param pk_type PK type to search for.
+ *
+ * \return The PK info associated with the type or NULL if not found.
+ */
+const mbedtls_pk_info_t *mbedtls_pk_info_from_type( mbedtls_pk_type_t pk_type );
+
+/**
+ * \brief Initialize a mbedtls_pk_context (as NONE)
+ */
+void mbedtls_pk_init( mbedtls_pk_context *ctx );
+
+/**
+ * \brief Free a mbedtls_pk_context
+ */
+void mbedtls_pk_free( mbedtls_pk_context *ctx );
+
+/**
+ * \brief Initialize a PK context with the information given
+ * and allocates the type-specific PK subcontext.
+ *
+ * \param ctx Context to initialize. Must be empty (type NONE).
+ * \param info Information to use
+ *
+ * \return 0 on success,
+ * MBEDTLS_ERR_PK_BAD_INPUT_DATA on invalid input,
+ * MBEDTLS_ERR_PK_ALLOC_FAILED on allocation failure.
+ *
+ * \note For contexts holding an RSA-alt key, use
+ * \c mbedtls_pk_setup_rsa_alt() instead.
+ */
+int mbedtls_pk_setup( mbedtls_pk_context *ctx, const mbedtls_pk_info_t *info );
+
+#if defined(MBEDTLS_PK_RSA_ALT_SUPPORT)
+/**
+ * \brief Initialize an RSA-alt context
+ *
+ * \param ctx Context to initialize. Must be empty (type NONE).
+ * \param key RSA key pointer
+ * \param decrypt_func Decryption function
+ * \param sign_func Signing function
+ * \param key_len_func Function returning key length in bytes
+ *
+ * \return 0 on success, or MBEDTLS_ERR_PK_BAD_INPUT_DATA if the
+ * context wasn't already initialized as RSA_ALT.
+ *
+ * \note This function replaces \c mbedtls_pk_setup() for RSA-alt.
+ */
+int mbedtls_pk_setup_rsa_alt( mbedtls_pk_context *ctx, void * key,
+ mbedtls_pk_rsa_alt_decrypt_func decrypt_func,
+ mbedtls_pk_rsa_alt_sign_func sign_func,
+ mbedtls_pk_rsa_alt_key_len_func key_len_func );
+#endif /* MBEDTLS_PK_RSA_ALT_SUPPORT */
+
+/**
+ * \brief Get the size in bits of the underlying key
+ *
+ * \param ctx Context to use
+ *
+ * \return Key size in bits, or 0 on error
+ */
+size_t mbedtls_pk_get_bitlen( const mbedtls_pk_context *ctx );
+
+/**
+ * \brief Get the length in bytes of the underlying key
+ * \param ctx Context to use
+ *
+ * \return Key length in bytes, or 0 on error
+ */
+static inline size_t mbedtls_pk_get_len( const mbedtls_pk_context *ctx )
+{
+ return( ( mbedtls_pk_get_bitlen( ctx ) + 7 ) / 8 );
+}
+
+/**
+ * \brief Tell if a context can do the operation given by type
+ *
+ * \param ctx Context to test
+ * \param type Target type
+ *
+ * \return 0 if context can't do the operations,
+ * 1 otherwise.
+ */
+int mbedtls_pk_can_do( const mbedtls_pk_context *ctx, mbedtls_pk_type_t type );
+
+/**
+ * \brief Verify signature (including padding if relevant).
+ *
+ * \param ctx PK context to use
+ * \param md_alg Hash algorithm used (see notes)
+ * \param hash Hash of the message to sign
+ * \param hash_len Hash length or 0 (see notes)
+ * \param sig Signature to verify
+ * \param sig_len Signature length
+ *
+ * \return 0 on success (signature is valid),
+ * MBEDTLS_ERR_PK_SIG_LEN_MISMATCH if the signature is
+ * valid but its actual length is less than sig_len,
+ * or a specific error code.
+ *
+ * \note For RSA keys, the default padding type is PKCS#1 v1.5.
+ * Use \c mbedtls_pk_verify_ext( MBEDTLS_PK_RSASSA_PSS, ... )
+ * to verify RSASSA_PSS signatures.
+ *
+ * \note If hash_len is 0, then the length associated with md_alg
+ * is used instead, or an error returned if it is invalid.
+ *
+ * \note md_alg may be MBEDTLS_MD_NONE, only if hash_len != 0
+ */
+int mbedtls_pk_verify( mbedtls_pk_context *ctx, mbedtls_md_type_t md_alg,
+ const unsigned char *hash, size_t hash_len,
+ const unsigned char *sig, size_t sig_len );
+
+/**
+ * \brief Verify signature, with options.
+ * (Includes verification of the padding depending on type.)
+ *
+ * \param type Signature type (inc. possible padding type) to verify
+ * \param options Pointer to type-specific options, or NULL
+ * \param ctx PK context to use
+ * \param md_alg Hash algorithm used (see notes)
+ * \param hash Hash of the message to sign
+ * \param hash_len Hash length or 0 (see notes)
+ * \param sig Signature to verify
+ * \param sig_len Signature length
+ *
+ * \return 0 on success (signature is valid),
+ * MBEDTLS_ERR_PK_TYPE_MISMATCH if the PK context can't be
+ * used for this type of signatures,
+ * MBEDTLS_ERR_PK_SIG_LEN_MISMATCH if the signature is
+ * valid but its actual length is less than sig_len,
+ * or a specific error code.
+ *
+ * \note If hash_len is 0, then the length associated with md_alg
+ * is used instead, or an error returned if it is invalid.
+ *
+ * \note md_alg may be MBEDTLS_MD_NONE, only if hash_len != 0
+ *
+ * \note If type is MBEDTLS_PK_RSASSA_PSS, then options must point
+ * to a mbedtls_pk_rsassa_pss_options structure,
+ * otherwise it must be NULL.
+ */
+int mbedtls_pk_verify_ext( mbedtls_pk_type_t type, const void *options,
+ mbedtls_pk_context *ctx, mbedtls_md_type_t md_alg,
+ const unsigned char *hash, size_t hash_len,
+ const unsigned char *sig, size_t sig_len );
+
+/**
+ * \brief Make signature, including padding if relevant.
+ *
+ * \param ctx PK context to use - must hold a private key
+ * \param md_alg Hash algorithm used (see notes)
+ * \param hash Hash of the message to sign
+ * \param hash_len Hash length or 0 (see notes)
+ * \param sig Place to write the signature
+ * \param sig_len Number of bytes written
+ * \param f_rng RNG function
+ * \param p_rng RNG parameter
+ *
+ * \return 0 on success, or a specific error code.
+ *
+ * \note For RSA keys, the default padding type is PKCS#1 v1.5.
+ * There is no interface in the PK module to make RSASSA-PSS
+ * signatures yet.
+ *
+ * \note If hash_len is 0, then the length associated with md_alg
+ * is used instead, or an error returned if it is invalid.
+ *
+ * \note For RSA, md_alg may be MBEDTLS_MD_NONE if hash_len != 0.
+ * For ECDSA, md_alg may never be MBEDTLS_MD_NONE.
+ */
+int mbedtls_pk_sign( mbedtls_pk_context *ctx, mbedtls_md_type_t md_alg,
+ const unsigned char *hash, size_t hash_len,
+ unsigned char *sig, size_t *sig_len,
+ int (*f_rng)(void *, unsigned char *, size_t), void *p_rng );
+
+/**
+ * \brief Decrypt message (including padding if relevant).
+ *
+ * \param ctx PK context to use - must hold a private key
+ * \param input Input to decrypt
+ * \param ilen Input size
+ * \param output Decrypted output
+ * \param olen Decrypted message length
+ * \param osize Size of the output buffer
+ * \param f_rng RNG function
+ * \param p_rng RNG parameter
+ *
+ * \note For RSA keys, the default padding type is PKCS#1 v1.5.
+ *
+ * \return 0 on success, or a specific error code.
+ */
+int mbedtls_pk_decrypt( mbedtls_pk_context *ctx,
+ const unsigned char *input, size_t ilen,
+ unsigned char *output, size_t *olen, size_t osize,
+ int (*f_rng)(void *, unsigned char *, size_t), void *p_rng );
+
+/**
+ * \brief Encrypt message (including padding if relevant).
+ *
+ * \param ctx PK context to use
+ * \param input Message to encrypt
+ * \param ilen Message size
+ * \param output Encrypted output
+ * \param olen Encrypted output length
+ * \param osize Size of the output buffer
+ * \param f_rng RNG function
+ * \param p_rng RNG parameter
+ *
+ * \note For RSA keys, the default padding type is PKCS#1 v1.5.
+ *
+ * \return 0 on success, or a specific error code.
+ */
+int mbedtls_pk_encrypt( mbedtls_pk_context *ctx,
+ const unsigned char *input, size_t ilen,
+ unsigned char *output, size_t *olen, size_t osize,
+ int (*f_rng)(void *, unsigned char *, size_t), void *p_rng );
+
+/**
+ * \brief Check if a public-private pair of keys matches.
+ *
+ * \param pub Context holding a public key.
+ * \param prv Context holding a private (and public) key.
+ *
+ * \return 0 on success or MBEDTLS_ERR_PK_BAD_INPUT_DATA
+ */
+int mbedtls_pk_check_pair( const mbedtls_pk_context *pub, const mbedtls_pk_context *prv );
+
+/**
+ * \brief Export debug information
+ *
+ * \param ctx Context to use
+ * \param items Place to write debug items
+ *
+ * \return 0 on success or MBEDTLS_ERR_PK_BAD_INPUT_DATA
+ */
+int mbedtls_pk_debug( const mbedtls_pk_context *ctx, mbedtls_pk_debug_item *items );
+
+/**
+ * \brief Access the type name
+ *
+ * \param ctx Context to use
+ *
+ * \return Type name on success, or "invalid PK"
+ */
+const char * mbedtls_pk_get_name( const mbedtls_pk_context *ctx );
+
+/**
+ * \brief Get the key type
+ *
+ * \param ctx Context to use
+ *
+ * \return Type on success, or MBEDTLS_PK_NONE
+ */
+mbedtls_pk_type_t mbedtls_pk_get_type( const mbedtls_pk_context *ctx );
+
+#if defined(MBEDTLS_PK_PARSE_C)
+/** \ingroup pk_module */
+/**
+ * \brief Parse a private key in PEM or DER format
+ *
+ * \param ctx key to be initialized
+ * \param key input buffer
+ * \param keylen size of the buffer
+ * (including the terminating null byte for PEM data)
+ * \param pwd password for decryption (optional)
+ * \param pwdlen size of the password
+ *
+ * \note On entry, ctx must be empty, either freshly initialised
+ * with mbedtls_pk_init() or reset with mbedtls_pk_free(). If you need a
+ * specific key type, check the result with mbedtls_pk_can_do().
+ *
+ * \note The key is also checked for correctness.
+ *
+ * \return 0 if successful, or a specific PK or PEM error code
+ */
+int mbedtls_pk_parse_key( mbedtls_pk_context *ctx,
+ const unsigned char *key, size_t keylen,
+ const unsigned char *pwd, size_t pwdlen );
+
+/** \ingroup pk_module */
+/**
+ * \brief Parse a public key in PEM or DER format
+ *
+ * \param ctx key to be initialized
+ * \param key input buffer
+ * \param keylen size of the buffer
+ * (including the terminating null byte for PEM data)
+ *
+ * \note On entry, ctx must be empty, either freshly initialised
+ * with mbedtls_pk_init() or reset with mbedtls_pk_free(). If you need a
+ * specific key type, check the result with mbedtls_pk_can_do().
+ *
+ * \note The key is also checked for correctness.
+ *
+ * \return 0 if successful, or a specific PK or PEM error code
+ */
+int mbedtls_pk_parse_public_key( mbedtls_pk_context *ctx,
+ const unsigned char *key, size_t keylen );
+
+#if defined(MBEDTLS_FS_IO)
+/** \ingroup pk_module */
+/**
+ * \brief Load and parse a private key
+ *
+ * \param ctx key to be initialized
+ * \param path filename to read the private key from
+ * \param password password to decrypt the file (can be NULL)
+ *
+ * \note On entry, ctx must be empty, either freshly initialised
+ * with mbedtls_pk_init() or reset with mbedtls_pk_free(). If you need a
+ * specific key type, check the result with mbedtls_pk_can_do().
+ *
+ * \note The key is also checked for correctness.
+ *
+ * \return 0 if successful, or a specific PK or PEM error code
+ */
+int mbedtls_pk_parse_keyfile( mbedtls_pk_context *ctx,
+ const char *path, const char *password );
+
+/** \ingroup pk_module */
+/**
+ * \brief Load and parse a public key
+ *
+ * \param ctx key to be initialized
+ * \param path filename to read the public key from
+ *
+ * \note On entry, ctx must be empty, either freshly initialised
+ * with mbedtls_pk_init() or reset with mbedtls_pk_free(). If
+ * you need a specific key type, check the result with
+ * mbedtls_pk_can_do().
+ *
+ * \note The key is also checked for correctness.
+ *
+ * \return 0 if successful, or a specific PK or PEM error code
+ */
+int mbedtls_pk_parse_public_keyfile( mbedtls_pk_context *ctx, const char *path );
+#endif /* MBEDTLS_FS_IO */
+#endif /* MBEDTLS_PK_PARSE_C */
+
+#if defined(MBEDTLS_PK_WRITE_C)
+/**
+ * \brief Write a private key to a PKCS#1 or SEC1 DER structure
+ * Note: data is written at the end of the buffer! Use the
+ * return value to determine where you should start
+ * using the buffer
+ *
+ * \param ctx private to write away
+ * \param buf buffer to write to
+ * \param size size of the buffer
+ *
+ * \return length of data written if successful, or a specific
+ * error code
+ */
+int mbedtls_pk_write_key_der( mbedtls_pk_context *ctx, unsigned char *buf, size_t size );
+
+/**
+ * \brief Write a public key to a SubjectPublicKeyInfo DER structure
+ * Note: data is written at the end of the buffer! Use the
+ * return value to determine where you should start
+ * using the buffer
+ *
+ * \param ctx public key to write away
+ * \param buf buffer to write to
+ * \param size size of the buffer
+ *
+ * \return length of data written if successful, or a specific
+ * error code
+ */
+int mbedtls_pk_write_pubkey_der( mbedtls_pk_context *ctx, unsigned char *buf, size_t size );
+
+#if defined(MBEDTLS_PEM_WRITE_C)
+/**
+ * \brief Write a public key to a PEM string
+ *
+ * \param ctx public key to write away
+ * \param buf buffer to write to
+ * \param size size of the buffer
+ *
+ * \return 0 if successful, or a specific error code
+ */
+int mbedtls_pk_write_pubkey_pem( mbedtls_pk_context *ctx, unsigned char *buf, size_t size );
+
+/**
+ * \brief Write a private key to a PKCS#1 or SEC1 PEM string
+ *
+ * \param ctx private to write away
+ * \param buf buffer to write to
+ * \param size size of the buffer
+ *
+ * \return 0 if successful, or a specific error code
+ */
+int mbedtls_pk_write_key_pem( mbedtls_pk_context *ctx, unsigned char *buf, size_t size );
+#endif /* MBEDTLS_PEM_WRITE_C */
+#endif /* MBEDTLS_PK_WRITE_C */
+
+/*
+ * WARNING: Low-level functions. You probably do not want to use these unless
+ * you are certain you do ;)
+ */
+
+#if defined(MBEDTLS_PK_PARSE_C)
+/**
+ * \brief Parse a SubjectPublicKeyInfo DER structure
+ *
+ * \param p the position in the ASN.1 data
+ * \param end end of the buffer
+ * \param pk the key to fill
+ *
+ * \return 0 if successful, or a specific PK error code
+ */
+int mbedtls_pk_parse_subpubkey( unsigned char **p, const unsigned char *end,
+ mbedtls_pk_context *pk );
+#endif /* MBEDTLS_PK_PARSE_C */
+
+#if defined(MBEDTLS_PK_WRITE_C)
+/**
+ * \brief Write a subjectPublicKey to ASN.1 data
+ * Note: function works backwards in data buffer
+ *
+ * \param p reference to current position pointer
+ * \param start start of the buffer (for bounds-checking)
+ * \param key public key to write away
+ *
+ * \return the length written or a negative error code
+ */
+int mbedtls_pk_write_pubkey( unsigned char **p, unsigned char *start,
+ const mbedtls_pk_context *key );
+#endif /* MBEDTLS_PK_WRITE_C */
+
+/*
+ * Internal module functions. You probably do not want to use these unless you
+ * know you do.
+ */
+#if defined(MBEDTLS_FS_IO)
+int mbedtls_pk_load_file( const char *path, unsigned char **buf, size_t *n );
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* MBEDTLS_PK_H */
diff --git a/backport/compat/verification/mbedtls/platform.h b/backport/compat/verification/mbedtls/platform.h
new file mode 100644
index 00000000..cf5fa56f
--- /dev/null
+++ b/backport/compat/verification/mbedtls/platform.h
@@ -0,0 +1,12 @@
+#ifndef __MBEDTLS_PLATFORM_H
+#define __MBEDTLS_PLATFORM_H
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+
+#define mbedtls_printf pr_debug
+#define mbedtls_calloc(a, b) kcalloc(a, b, GFP_KERNEL)
+#define mbedtls_free kfree
+#define mbedtls_snprintf snprintf
+
+#endif /* __MBEDTLS_PLATFORM_H */
diff --git a/backport/compat/verification/mbedtls/rsa.h b/backport/compat/verification/mbedtls/rsa.h
new file mode 100644
index 00000000..9683520c
--- /dev/null
+++ b/backport/compat/verification/mbedtls/rsa.h
@@ -0,0 +1,672 @@
+/**
+ * \file rsa.h
+ *
+ * \brief The RSA public-key cryptosystem
+ *
+ * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
+ * SPDX-License-Identifier: GPL-2.0
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * This file is part of mbed TLS (https://tls.mbed.org)
+ */
+#ifndef MBEDTLS_RSA_H
+#define MBEDTLS_RSA_H
+
+#if !defined(MBEDTLS_CONFIG_FILE)
+#include "config.h"
+#else
+#include MBEDTLS_CONFIG_FILE
+#endif
+
+#include "bignum.h"
+#include "md.h"
+
+#if defined(MBEDTLS_THREADING_C)
+#include "threading.h"
+#endif
+
+/*
+ * RSA Error codes
+ */
+#define MBEDTLS_ERR_RSA_BAD_INPUT_DATA -0x4080 /**< Bad input parameters to function. */
+#define MBEDTLS_ERR_RSA_INVALID_PADDING -0x4100 /**< Input data contains invalid padding and is rejected. */
+#define MBEDTLS_ERR_RSA_KEY_GEN_FAILED -0x4180 /**< Something failed during generation of a key. */
+#define MBEDTLS_ERR_RSA_KEY_CHECK_FAILED -0x4200 /**< Key failed to pass the library's validity check. */
+#define MBEDTLS_ERR_RSA_PUBLIC_FAILED -0x4280 /**< The public key operation failed. */
+#define MBEDTLS_ERR_RSA_PRIVATE_FAILED -0x4300 /**< The private key operation failed. */
+#define MBEDTLS_ERR_RSA_VERIFY_FAILED -0x4380 /**< The PKCS#1 verification failed. */
+#define MBEDTLS_ERR_RSA_OUTPUT_TOO_LARGE -0x4400 /**< The output buffer for decryption is not large enough. */
+#define MBEDTLS_ERR_RSA_RNG_FAILED -0x4480 /**< The random generator failed to generate non-zeros. */
+
+/*
+ * RSA constants
+ */
+#define MBEDTLS_RSA_PUBLIC 0
+#define MBEDTLS_RSA_PRIVATE 1
+
+#define MBEDTLS_RSA_PKCS_V15 0
+#define MBEDTLS_RSA_PKCS_V21 1
+
+#define MBEDTLS_RSA_SIGN 1
+#define MBEDTLS_RSA_CRYPT 2
+
+#define MBEDTLS_RSA_SALT_LEN_ANY -1
+
+/*
+ * The above constants may be used even if the RSA module is compile out,
+ * eg for alternative (PKCS#11) RSA implemenations in the PK layers.
+ */
+#if defined(MBEDTLS_RSA_C)
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * \brief RSA context structure
+ */
+typedef struct
+{
+ int ver; /*!< always 0 */
+ size_t len; /*!< size(N) in chars */
+
+ mbedtls_mpi N; /*!< public modulus */
+ mbedtls_mpi E; /*!< public exponent */
+
+ mbedtls_mpi D; /*!< private exponent */
+ mbedtls_mpi P; /*!< 1st prime factor */
+ mbedtls_mpi Q; /*!< 2nd prime factor */
+ mbedtls_mpi DP; /*!< D % (P - 1) */
+ mbedtls_mpi DQ; /*!< D % (Q - 1) */
+ mbedtls_mpi QP; /*!< 1 / (Q % P) */
+
+ mbedtls_mpi RN; /*!< cached R^2 mod N */
+ mbedtls_mpi RP; /*!< cached R^2 mod P */
+ mbedtls_mpi RQ; /*!< cached R^2 mod Q */
+
+ mbedtls_mpi Vi; /*!< cached blinding value */
+ mbedtls_mpi Vf; /*!< cached un-blinding value */
+
+ int padding; /*!< MBEDTLS_RSA_PKCS_V15 for 1.5 padding and
+ MBEDTLS_RSA_PKCS_v21 for OAEP/PSS */
+ int hash_id; /*!< Hash identifier of mbedtls_md_type_t as
+ specified in the mbedtls_md.h header file
+ for the EME-OAEP and EMSA-PSS
+ encoding */
+#if defined(MBEDTLS_THREADING_C)
+ mbedtls_threading_mutex_t mutex; /*!< Thread-safety mutex */
+#endif
+}
+mbedtls_rsa_context;
+
+/**
+ * \brief Initialize an RSA context
+ *
+ * Note: Set padding to MBEDTLS_RSA_PKCS_V21 for the RSAES-OAEP
+ * encryption scheme and the RSASSA-PSS signature scheme.
+ *
+ * \param ctx RSA context to be initialized
+ * \param padding MBEDTLS_RSA_PKCS_V15 or MBEDTLS_RSA_PKCS_V21
+ * \param hash_id MBEDTLS_RSA_PKCS_V21 hash identifier
+ *
+ * \note The hash_id parameter is actually ignored
+ * when using MBEDTLS_RSA_PKCS_V15 padding.
+ *
+ * \note Choice of padding mode is strictly enforced for private key
+ * operations, since there might be security concerns in
+ * mixing padding modes. For public key operations it's merely
+ * a default value, which can be overriden by calling specific
+ * rsa_rsaes_xxx or rsa_rsassa_xxx functions.
+ *
+ * \note The chosen hash is always used for OEAP encryption.
+ * For PSS signatures, it's always used for making signatures,
+ * but can be overriden (and always is, if set to
+ * MBEDTLS_MD_NONE) for verifying them.
+ */
+void mbedtls_rsa_init( mbedtls_rsa_context *ctx,
+ int padding,
+ int hash_id);
+
+/**
+ * \brief Set padding for an already initialized RSA context
+ * See \c mbedtls_rsa_init() for details.
+ *
+ * \param ctx RSA context to be set
+ * \param padding MBEDTLS_RSA_PKCS_V15 or MBEDTLS_RSA_PKCS_V21
+ * \param hash_id MBEDTLS_RSA_PKCS_V21 hash identifier
+ */
+void mbedtls_rsa_set_padding( mbedtls_rsa_context *ctx, int padding, int hash_id);
+
+/**
+ * \brief Generate an RSA keypair
+ *
+ * \param ctx RSA context that will hold the key
+ * \param f_rng RNG function
+ * \param p_rng RNG parameter
+ * \param nbits size of the public key in bits
+ * \param exponent public exponent (e.g., 65537)
+ *
+ * \note mbedtls_rsa_init() must be called beforehand to setup
+ * the RSA context.
+ *
+ * \return 0 if successful, or an MBEDTLS_ERR_RSA_XXX error code
+ */
+int mbedtls_rsa_gen_key( mbedtls_rsa_context *ctx,
+ int (*f_rng)(void *, unsigned char *, size_t),
+ void *p_rng,
+ unsigned int nbits, int exponent );
+
+/**
+ * \brief Check a public RSA key
+ *
+ * \param ctx RSA context to be checked
+ *
+ * \return 0 if successful, or an MBEDTLS_ERR_RSA_XXX error code
+ */
+int mbedtls_rsa_check_pubkey( const mbedtls_rsa_context *ctx );
+
+/**
+ * \brief Check a private RSA key
+ *
+ * \param ctx RSA context to be checked
+ *
+ * \return 0 if successful, or an MBEDTLS_ERR_RSA_XXX error code
+ */
+int mbedtls_rsa_check_privkey( const mbedtls_rsa_context *ctx );
+
+/**
+ * \brief Check a public-private RSA key pair.
+ * Check each of the contexts, and make sure they match.
+ *
+ * \param pub RSA context holding the public key
+ * \param prv RSA context holding the private key
+ *
+ * \return 0 if successful, or an MBEDTLS_ERR_RSA_XXX error code
+ */
+int mbedtls_rsa_check_pub_priv( const mbedtls_rsa_context *pub, const mbedtls_rsa_context *prv );
+
+/**
+ * \brief Do an RSA public key operation
+ *
+ * \param ctx RSA context
+ * \param input input buffer
+ * \param output output buffer
+ *
+ * \return 0 if successful, or an MBEDTLS_ERR_RSA_XXX error code
+ *
+ * \note This function does NOT take care of message
+ * padding. Also, be sure to set input[0] = 0 or ensure that
+ * input is smaller than N.
+ *
+ * \note The input and output buffers must be large
+ * enough (eg. 128 bytes if RSA-1024 is used).
+ */
+int mbedtls_rsa_public( mbedtls_rsa_context *ctx,
+ const unsigned char *input,
+ unsigned char *output );
+
+/**
+ * \brief Do an RSA private key operation
+ *
+ * \param ctx RSA context
+ * \param f_rng RNG function (Needed for blinding)
+ * \param p_rng RNG parameter
+ * \param input input buffer
+ * \param output output buffer
+ *
+ * \return 0 if successful, or an MBEDTLS_ERR_RSA_XXX error code
+ *
+ * \note The input and output buffers must be large
+ * enough (eg. 128 bytes if RSA-1024 is used).
+ */
+int mbedtls_rsa_private( mbedtls_rsa_context *ctx,
+ int (*f_rng)(void *, unsigned char *, size_t),
+ void *p_rng,
+ const unsigned char *input,
+ unsigned char *output );
+
+/**
+ * \brief Generic wrapper to perform a PKCS#1 encryption using the
+ * mode from the context. Add the message padding, then do an
+ * RSA operation.
+ *
+ * \param ctx RSA context
+ * \param f_rng RNG function (Needed for padding and PKCS#1 v2.1 encoding
+ * and MBEDTLS_RSA_PRIVATE)
+ * \param p_rng RNG parameter
+ * \param mode MBEDTLS_RSA_PUBLIC or MBEDTLS_RSA_PRIVATE
+ * \param ilen contains the plaintext length
+ * \param input buffer holding the data to be encrypted
+ * \param output buffer that will hold the ciphertext
+ *
+ * \return 0 if successful, or an MBEDTLS_ERR_RSA_XXX error code
+ *
+ * \note The output buffer must be as large as the size
+ * of ctx->N (eg. 128 bytes if RSA-1024 is used).
+ */
+int mbedtls_rsa_pkcs1_encrypt( mbedtls_rsa_context *ctx,
+ int (*f_rng)(void *, unsigned char *, size_t),
+ void *p_rng,
+ int mode, size_t ilen,
+ const unsigned char *input,
+ unsigned char *output );
+
+/**
+ * \brief Perform a PKCS#1 v1.5 encryption (RSAES-PKCS1-v1_5-ENCRYPT)
+ *
+ * \param ctx RSA context
+ * \param f_rng RNG function (Needed for padding and MBEDTLS_RSA_PRIVATE)
+ * \param p_rng RNG parameter
+ * \param mode MBEDTLS_RSA_PUBLIC or MBEDTLS_RSA_PRIVATE
+ * \param ilen contains the plaintext length
+ * \param input buffer holding the data to be encrypted
+ * \param output buffer that will hold the ciphertext
+ *
+ * \return 0 if successful, or an MBEDTLS_ERR_RSA_XXX error code
+ *
+ * \note The output buffer must be as large as the size
+ * of ctx->N (eg. 128 bytes if RSA-1024 is used).
+ */
+int mbedtls_rsa_rsaes_pkcs1_v15_encrypt( mbedtls_rsa_context *ctx,
+ int (*f_rng)(void *, unsigned char *, size_t),
+ void *p_rng,
+ int mode, size_t ilen,
+ const unsigned char *input,
+ unsigned char *output );
+
+/**
+ * \brief Perform a PKCS#1 v2.1 OAEP encryption (RSAES-OAEP-ENCRYPT)
+ *
+ * \param ctx RSA context
+ * \param f_rng RNG function (Needed for padding and PKCS#1 v2.1 encoding
+ * and MBEDTLS_RSA_PRIVATE)
+ * \param p_rng RNG parameter
+ * \param mode MBEDTLS_RSA_PUBLIC or MBEDTLS_RSA_PRIVATE
+ * \param label buffer holding the custom label to use
+ * \param label_len contains the label length
+ * \param ilen contains the plaintext length
+ * \param input buffer holding the data to be encrypted
+ * \param output buffer that will hold the ciphertext
+ *
+ * \return 0 if successful, or an MBEDTLS_ERR_RSA_XXX error code
+ *
+ * \note The output buffer must be as large as the size
+ * of ctx->N (eg. 128 bytes if RSA-1024 is used).
+ */
+int mbedtls_rsa_rsaes_oaep_encrypt( mbedtls_rsa_context *ctx,
+ int (*f_rng)(void *, unsigned char *, size_t),
+ void *p_rng,
+ int mode,
+ const unsigned char *label, size_t label_len,
+ size_t ilen,
+ const unsigned char *input,
+ unsigned char *output );
+
+/**
+ * \brief Generic wrapper to perform a PKCS#1 decryption using the
+ * mode from the context. Do an RSA operation, then remove
+ * the message padding
+ *
+ * \param ctx RSA context
+ * \param f_rng RNG function (Only needed for MBEDTLS_RSA_PRIVATE)
+ * \param p_rng RNG parameter
+ * \param mode MBEDTLS_RSA_PUBLIC or MBEDTLS_RSA_PRIVATE
+ * \param olen will contain the plaintext length
+ * \param input buffer holding the encrypted data
+ * \param output buffer that will hold the plaintext
+ * \param output_max_len maximum length of the output buffer
+ *
+ * \return 0 if successful, or an MBEDTLS_ERR_RSA_XXX error code
+ *
+ * \note The output buffer length \c output_max_len should be
+ * as large as the size ctx->len of ctx->N (eg. 128 bytes
+ * if RSA-1024 is used) to be able to hold an arbitrary
+ * decrypted message. If it is not large enough to hold
+ * the decryption of the particular ciphertext provided,
+ * the function will return MBEDTLS_ERR_RSA_OUTPUT_TOO_LARGE.
+ *
+ * \note The input buffer must be as large as the size
+ * of ctx->N (eg. 128 bytes if RSA-1024 is used).
+ */
+int mbedtls_rsa_pkcs1_decrypt( mbedtls_rsa_context *ctx,
+ int (*f_rng)(void *, unsigned char *, size_t),
+ void *p_rng,
+ int mode, size_t *olen,
+ const unsigned char *input,
+ unsigned char *output,
+ size_t output_max_len );
+
+/**
+ * \brief Perform a PKCS#1 v1.5 decryption (RSAES-PKCS1-v1_5-DECRYPT)
+ *
+ * \param ctx RSA context
+ * \param f_rng RNG function (Only needed for MBEDTLS_RSA_PRIVATE)
+ * \param p_rng RNG parameter
+ * \param mode MBEDTLS_RSA_PUBLIC or MBEDTLS_RSA_PRIVATE
+ * \param olen will contain the plaintext length
+ * \param input buffer holding the encrypted data
+ * \param output buffer that will hold the plaintext
+ * \param output_max_len maximum length of the output buffer
+ *
+ * \return 0 if successful, or an MBEDTLS_ERR_RSA_XXX error code
+ *
+ * \note The output buffer length \c output_max_len should be
+ * as large as the size ctx->len of ctx->N (eg. 128 bytes
+ * if RSA-1024 is used) to be able to hold an arbitrary
+ * decrypted message. If it is not large enough to hold
+ * the decryption of the particular ciphertext provided,
+ * the function will return MBEDTLS_ERR_RSA_OUTPUT_TOO_LARGE.
+ *
+ * \note The input buffer must be as large as the size
+ * of ctx->N (eg. 128 bytes if RSA-1024 is used).
+ */
+int mbedtls_rsa_rsaes_pkcs1_v15_decrypt( mbedtls_rsa_context *ctx,
+ int (*f_rng)(void *, unsigned char *, size_t),
+ void *p_rng,
+ int mode, size_t *olen,
+ const unsigned char *input,
+ unsigned char *output,
+ size_t output_max_len );
+
+/**
+ * \brief Perform a PKCS#1 v2.1 OAEP decryption (RSAES-OAEP-DECRYPT)
+ *
+ * \param ctx RSA context
+ * \param f_rng RNG function (Only needed for MBEDTLS_RSA_PRIVATE)
+ * \param p_rng RNG parameter
+ * \param mode MBEDTLS_RSA_PUBLIC or MBEDTLS_RSA_PRIVATE
+ * \param label buffer holding the custom label to use
+ * \param label_len contains the label length
+ * \param olen will contain the plaintext length
+ * \param input buffer holding the encrypted data
+ * \param output buffer that will hold the plaintext
+ * \param output_max_len maximum length of the output buffer
+ *
+ * \return 0 if successful, or an MBEDTLS_ERR_RSA_XXX error code
+ *
+ * \note The output buffer length \c output_max_len should be
+ * as large as the size ctx->len of ctx->N (eg. 128 bytes
+ * if RSA-1024 is used) to be able to hold an arbitrary
+ * decrypted message. If it is not large enough to hold
+ * the decryption of the particular ciphertext provided,
+ * the function will return MBEDTLS_ERR_RSA_OUTPUT_TOO_LARGE.
+ *
+ * \note The input buffer must be as large as the size
+ * of ctx->N (eg. 128 bytes if RSA-1024 is used).
+ */
+int mbedtls_rsa_rsaes_oaep_decrypt( mbedtls_rsa_context *ctx,
+ int (*f_rng)(void *, unsigned char *, size_t),
+ void *p_rng,
+ int mode,
+ const unsigned char *label, size_t label_len,
+ size_t *olen,
+ const unsigned char *input,
+ unsigned char *output,
+ size_t output_max_len );
+
+/**
+ * \brief Generic wrapper to perform a PKCS#1 signature using the
+ * mode from the context. Do a private RSA operation to sign
+ * a message digest
+ *
+ * \param ctx RSA context
+ * \param f_rng RNG function (Needed for PKCS#1 v2.1 encoding and for
+ * MBEDTLS_RSA_PRIVATE)
+ * \param p_rng RNG parameter
+ * \param mode MBEDTLS_RSA_PUBLIC or MBEDTLS_RSA_PRIVATE
+ * \param md_alg a MBEDTLS_MD_XXX (use MBEDTLS_MD_NONE for signing raw data)
+ * \param hashlen message digest length (for MBEDTLS_MD_NONE only)
+ * \param hash buffer holding the message digest
+ * \param sig buffer that will hold the ciphertext
+ *
+ * \return 0 if the signing operation was successful,
+ * or an MBEDTLS_ERR_RSA_XXX error code
+ *
+ * \note The "sig" buffer must be as large as the size
+ * of ctx->N (eg. 128 bytes if RSA-1024 is used).
+ *
+ * \note In case of PKCS#1 v2.1 encoding, see comments on
+ * \note \c mbedtls_rsa_rsassa_pss_sign() for details on md_alg and hash_id.
+ */
+int mbedtls_rsa_pkcs1_sign( mbedtls_rsa_context *ctx,
+ int (*f_rng)(void *, unsigned char *, size_t),
+ void *p_rng,
+ int mode,
+ mbedtls_md_type_t md_alg,
+ unsigned int hashlen,
+ const unsigned char *hash,
+ unsigned char *sig );
+
+/**
+ * \brief Perform a PKCS#1 v1.5 signature (RSASSA-PKCS1-v1_5-SIGN)
+ *
+ * \param ctx RSA context
+ * \param f_rng RNG function (Only needed for MBEDTLS_RSA_PRIVATE)
+ * \param p_rng RNG parameter
+ * \param mode MBEDTLS_RSA_PUBLIC or MBEDTLS_RSA_PRIVATE
+ * \param md_alg a MBEDTLS_MD_XXX (use MBEDTLS_MD_NONE for signing raw data)
+ * \param hashlen message digest length (for MBEDTLS_MD_NONE only)
+ * \param hash buffer holding the message digest
+ * \param sig buffer that will hold the ciphertext
+ *
+ * \return 0 if the signing operation was successful,
+ * or an MBEDTLS_ERR_RSA_XXX error code
+ *
+ * \note The "sig" buffer must be as large as the size
+ * of ctx->N (eg. 128 bytes if RSA-1024 is used).
+ */
+int mbedtls_rsa_rsassa_pkcs1_v15_sign( mbedtls_rsa_context *ctx,
+ int (*f_rng)(void *, unsigned char *, size_t),
+ void *p_rng,
+ int mode,
+ mbedtls_md_type_t md_alg,
+ unsigned int hashlen,
+ const unsigned char *hash,
+ unsigned char *sig );
+
+/**
+ * \brief Perform a PKCS#1 v2.1 PSS signature (RSASSA-PSS-SIGN)
+ *
+ * \param ctx RSA context
+ * \param f_rng RNG function (Needed for PKCS#1 v2.1 encoding and for
+ * MBEDTLS_RSA_PRIVATE)
+ * \param p_rng RNG parameter
+ * \param mode MBEDTLS_RSA_PUBLIC or MBEDTLS_RSA_PRIVATE
+ * \param md_alg a MBEDTLS_MD_XXX (use MBEDTLS_MD_NONE for signing raw data)
+ * \param hashlen message digest length (for MBEDTLS_MD_NONE only)
+ * \param hash buffer holding the message digest
+ * \param sig buffer that will hold the ciphertext
+ *
+ * \return 0 if the signing operation was successful,
+ * or an MBEDTLS_ERR_RSA_XXX error code
+ *
+ * \note The "sig" buffer must be as large as the size
+ * of ctx->N (eg. 128 bytes if RSA-1024 is used).
+ *
+ * \note The hash_id in the RSA context is the one used for the
+ * encoding. md_alg in the function call is the type of hash
+ * that is encoded. According to RFC 3447 it is advised to
+ * keep both hashes the same.
+ */
+int mbedtls_rsa_rsassa_pss_sign( mbedtls_rsa_context *ctx,
+ int (*f_rng)(void *, unsigned char *, size_t),
+ void *p_rng,
+ int mode,
+ mbedtls_md_type_t md_alg,
+ unsigned int hashlen,
+ const unsigned char *hash,
+ unsigned char *sig );
+
+/**
+ * \brief Generic wrapper to perform a PKCS#1 verification using the
+ * mode from the context. Do a public RSA operation and check
+ * the message digest
+ *
+ * \param ctx points to an RSA public key
+ * \param f_rng RNG function (Only needed for MBEDTLS_RSA_PRIVATE)
+ * \param p_rng RNG parameter
+ * \param mode MBEDTLS_RSA_PUBLIC or MBEDTLS_RSA_PRIVATE
+ * \param md_alg a MBEDTLS_MD_XXX (use MBEDTLS_MD_NONE for signing raw data)
+ * \param hashlen message digest length (for MBEDTLS_MD_NONE only)
+ * \param hash buffer holding the message digest
+ * \param sig buffer holding the ciphertext
+ *
+ * \return 0 if the verify operation was successful,
+ * or an MBEDTLS_ERR_RSA_XXX error code
+ *
+ * \note The "sig" buffer must be as large as the size
+ * of ctx->N (eg. 128 bytes if RSA-1024 is used).
+ *
+ * \note In case of PKCS#1 v2.1 encoding, see comments on
+ * \c mbedtls_rsa_rsassa_pss_verify() about md_alg and hash_id.
+ */
+int mbedtls_rsa_pkcs1_verify( mbedtls_rsa_context *ctx,
+ int (*f_rng)(void *, unsigned char *, size_t),
+ void *p_rng,
+ int mode,
+ mbedtls_md_type_t md_alg,
+ unsigned int hashlen,
+ const unsigned char *hash,
+ const unsigned char *sig );
+
+/**
+ * \brief Perform a PKCS#1 v1.5 verification (RSASSA-PKCS1-v1_5-VERIFY)
+ *
+ * \param ctx points to an RSA public key
+ * \param f_rng RNG function (Only needed for MBEDTLS_RSA_PRIVATE)
+ * \param p_rng RNG parameter
+ * \param mode MBEDTLS_RSA_PUBLIC or MBEDTLS_RSA_PRIVATE
+ * \param md_alg a MBEDTLS_MD_XXX (use MBEDTLS_MD_NONE for signing raw data)
+ * \param hashlen message digest length (for MBEDTLS_MD_NONE only)
+ * \param hash buffer holding the message digest
+ * \param sig buffer holding the ciphertext
+ *
+ * \return 0 if the verify operation was successful,
+ * or an MBEDTLS_ERR_RSA_XXX error code
+ *
+ * \note The "sig" buffer must be as large as the size
+ * of ctx->N (eg. 128 bytes if RSA-1024 is used).
+ */
+int mbedtls_rsa_rsassa_pkcs1_v15_verify( mbedtls_rsa_context *ctx,
+ int (*f_rng)(void *, unsigned char *, size_t),
+ void *p_rng,
+ int mode,
+ mbedtls_md_type_t md_alg,
+ unsigned int hashlen,
+ const unsigned char *hash,
+ const unsigned char *sig );
+
+/**
+ * \brief Perform a PKCS#1 v2.1 PSS verification (RSASSA-PSS-VERIFY)
+ * (This is the "simple" version.)
+ *
+ * \param ctx points to an RSA public key
+ * \param f_rng RNG function (Only needed for MBEDTLS_RSA_PRIVATE)
+ * \param p_rng RNG parameter
+ * \param mode MBEDTLS_RSA_PUBLIC or MBEDTLS_RSA_PRIVATE
+ * \param md_alg a MBEDTLS_MD_XXX (use MBEDTLS_MD_NONE for signing raw data)
+ * \param hashlen message digest length (for MBEDTLS_MD_NONE only)
+ * \param hash buffer holding the message digest
+ * \param sig buffer holding the ciphertext
+ *
+ * \return 0 if the verify operation was successful,
+ * or an MBEDTLS_ERR_RSA_XXX error code
+ *
+ * \note The "sig" buffer must be as large as the size
+ * of ctx->N (eg. 128 bytes if RSA-1024 is used).
+ *
+ * \note The hash_id in the RSA context is the one used for the
+ * verification. md_alg in the function call is the type of
+ * hash that is verified. According to RFC 3447 it is advised to
+ * keep both hashes the same. If hash_id in the RSA context is
+ * unset, the md_alg from the function call is used.
+ */
+int mbedtls_rsa_rsassa_pss_verify( mbedtls_rsa_context *ctx,
+ int (*f_rng)(void *, unsigned char *, size_t),
+ void *p_rng,
+ int mode,
+ mbedtls_md_type_t md_alg,
+ unsigned int hashlen,
+ const unsigned char *hash,
+ const unsigned char *sig );
+
+/**
+ * \brief Perform a PKCS#1 v2.1 PSS verification (RSASSA-PSS-VERIFY)
+ * (This is the version with "full" options.)
+ *
+ * \param ctx points to an RSA public key
+ * \param f_rng RNG function (Only needed for MBEDTLS_RSA_PRIVATE)
+ * \param p_rng RNG parameter
+ * \param mode MBEDTLS_RSA_PUBLIC or MBEDTLS_RSA_PRIVATE
+ * \param md_alg a MBEDTLS_MD_XXX (use MBEDTLS_MD_NONE for signing raw data)
+ * \param hashlen message digest length (for MBEDTLS_MD_NONE only)
+ * \param hash buffer holding the message digest
+ * \param mgf1_hash_id message digest used for mask generation
+ * \param expected_salt_len Length of the salt used in padding, use
+ * MBEDTLS_RSA_SALT_LEN_ANY to accept any salt length
+ * \param sig buffer holding the ciphertext
+ *
+ * \return 0 if the verify operation was successful,
+ * or an MBEDTLS_ERR_RSA_XXX error code
+ *
+ * \note The "sig" buffer must be as large as the size
+ * of ctx->N (eg. 128 bytes if RSA-1024 is used).
+ *
+ * \note The hash_id in the RSA context is ignored.
+ */
+int mbedtls_rsa_rsassa_pss_verify_ext( mbedtls_rsa_context *ctx,
+ int (*f_rng)(void *, unsigned char *, size_t),
+ void *p_rng,
+ int mode,
+ mbedtls_md_type_t md_alg,
+ unsigned int hashlen,
+ const unsigned char *hash,
+ mbedtls_md_type_t mgf1_hash_id,
+ int expected_salt_len,
+ const unsigned char *sig );
+
+/**
+ * \brief Copy the components of an RSA context
+ *
+ * \param dst Destination context
+ * \param src Source context
+ *
+ * \return 0 on success,
+ * MBEDTLS_ERR_MPI_ALLOC_FAILED on memory allocation failure
+ */
+int mbedtls_rsa_copy( mbedtls_rsa_context *dst, const mbedtls_rsa_context *src );
+
+/**
+ * \brief Free the components of an RSA key
+ *
+ * \param ctx RSA Context to free
+ */
+void mbedtls_rsa_free( mbedtls_rsa_context *ctx );
+
+/**
+ * \brief Checkup routine
+ *
+ * \return 0 if successful, or 1 if the test failed
+ */
+int mbedtls_rsa_self_test( int verbose );
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* MBEDTLS_RSA_C */
+
+#endif /* rsa.h */
diff --git a/backport/compat/verification/mbedtls/sha1.h b/backport/compat/verification/mbedtls/sha1.h
new file mode 100644
index 00000000..b8752edd
--- /dev/null
+++ b/backport/compat/verification/mbedtls/sha1.h
@@ -0,0 +1,135 @@
+/**
+ * \file sha1.h
+ *
+ * \brief SHA-1 cryptographic hash function
+ *
+ * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
+ * SPDX-License-Identifier: GPL-2.0
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * This file is part of mbed TLS (https://tls.mbed.org)
+ */
+#ifndef MBEDTLS_SHA1_H
+#define MBEDTLS_SHA1_H
+
+#if !defined(MBEDTLS_CONFIG_FILE)
+#include "config.h"
+#else
+#include MBEDTLS_CONFIG_FILE
+#endif
+
+#if !defined(MBEDTLS_SHA1_ALT)
+// Regular implementation
+//
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * \brief SHA-1 context structure
+ */
+typedef struct
+{
+ uint32_t total[2]; /*!< number of bytes processed */
+ uint32_t state[5]; /*!< intermediate digest state */
+ unsigned char buffer[64]; /*!< data block being processed */
+}
+mbedtls_sha1_context;
+
+/**
+ * \brief Initialize SHA-1 context
+ *
+ * \param ctx SHA-1 context to be initialized
+ */
+void mbedtls_sha1_init( mbedtls_sha1_context *ctx );
+
+/**
+ * \brief Clear SHA-1 context
+ *
+ * \param ctx SHA-1 context to be cleared
+ */
+void mbedtls_sha1_free( mbedtls_sha1_context *ctx );
+
+/**
+ * \brief Clone (the state of) a SHA-1 context
+ *
+ * \param dst The destination context
+ * \param src The context to be cloned
+ */
+void mbedtls_sha1_clone( mbedtls_sha1_context *dst,
+ const mbedtls_sha1_context *src );
+
+/**
+ * \brief SHA-1 context setup
+ *
+ * \param ctx context to be initialized
+ */
+void mbedtls_sha1_starts( mbedtls_sha1_context *ctx );
+
+/**
+ * \brief SHA-1 process buffer
+ *
+ * \param ctx SHA-1 context
+ * \param input buffer holding the data
+ * \param ilen length of the input data
+ */
+void mbedtls_sha1_update( mbedtls_sha1_context *ctx, const unsigned char *input, size_t ilen );
+
+/**
+ * \brief SHA-1 final digest
+ *
+ * \param ctx SHA-1 context
+ * \param output SHA-1 checksum result
+ */
+void mbedtls_sha1_finish( mbedtls_sha1_context *ctx, unsigned char output[20] );
+
+/* Internal use */
+void mbedtls_sha1_process( mbedtls_sha1_context *ctx, const unsigned char data[64] );
+
+#ifdef __cplusplus
+}
+#endif
+
+#else /* MBEDTLS_SHA1_ALT */
+#include "sha1_alt.h"
+#endif /* MBEDTLS_SHA1_ALT */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * \brief Output = SHA-1( input buffer )
+ *
+ * \param input buffer holding the data
+ * \param ilen length of the input data
+ * \param output SHA-1 checksum result
+ */
+void mbedtls_sha1( const unsigned char *input, size_t ilen, unsigned char output[20] );
+
+/**
+ * \brief Checkup routine
+ *
+ * \return 0 if successful, or 1 if the test failed
+ */
+int mbedtls_sha1_self_test( int verbose );
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* mbedtls_sha1.h */
diff --git a/backport/compat/verification/mbedtls/sha256.h b/backport/compat/verification/mbedtls/sha256.h
new file mode 100644
index 00000000..68223f0b
--- /dev/null
+++ b/backport/compat/verification/mbedtls/sha256.h
@@ -0,0 +1,140 @@
+/**
+ * \file sha256.h
+ *
+ * \brief SHA-224 and SHA-256 cryptographic hash function
+ *
+ * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
+ * SPDX-License-Identifier: GPL-2.0
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * This file is part of mbed TLS (https://tls.mbed.org)
+ */
+#ifndef MBEDTLS_SHA256_H
+#define MBEDTLS_SHA256_H
+
+#if !defined(MBEDTLS_CONFIG_FILE)
+#include "config.h"
+#else
+#include MBEDTLS_CONFIG_FILE
+#endif
+
+#if !defined(MBEDTLS_SHA256_ALT)
+// Regular implementation
+//
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * \brief SHA-256 context structure
+ */
+typedef struct
+{
+ uint32_t total[2]; /*!< number of bytes processed */
+ uint32_t state[8]; /*!< intermediate digest state */
+ unsigned char buffer[64]; /*!< data block being processed */
+ int is224; /*!< 0 => SHA-256, else SHA-224 */
+}
+mbedtls_sha256_context;
+
+/**
+ * \brief Initialize SHA-256 context
+ *
+ * \param ctx SHA-256 context to be initialized
+ */
+void mbedtls_sha256_init( mbedtls_sha256_context *ctx );
+
+/**
+ * \brief Clear SHA-256 context
+ *
+ * \param ctx SHA-256 context to be cleared
+ */
+void mbedtls_sha256_free( mbedtls_sha256_context *ctx );
+
+/**
+ * \brief Clone (the state of) a SHA-256 context
+ *
+ * \param dst The destination context
+ * \param src The context to be cloned
+ */
+void mbedtls_sha256_clone( mbedtls_sha256_context *dst,
+ const mbedtls_sha256_context *src );
+
+/**
+ * \brief SHA-256 context setup
+ *
+ * \param ctx context to be initialized
+ * \param is224 0 = use SHA256, 1 = use SHA224
+ */
+void mbedtls_sha256_starts( mbedtls_sha256_context *ctx, int is224 );
+
+/**
+ * \brief SHA-256 process buffer
+ *
+ * \param ctx SHA-256 context
+ * \param input buffer holding the data
+ * \param ilen length of the input data
+ */
+void mbedtls_sha256_update( mbedtls_sha256_context *ctx, const unsigned char *input,
+ size_t ilen );
+
+/**
+ * \brief SHA-256 final digest
+ *
+ * \param ctx SHA-256 context
+ * \param output SHA-224/256 checksum result
+ */
+void mbedtls_sha256_finish( mbedtls_sha256_context *ctx, unsigned char output[32] );
+
+/* Internal use */
+void mbedtls_sha256_process( mbedtls_sha256_context *ctx, const unsigned char data[64] );
+
+#ifdef __cplusplus
+}
+#endif
+
+#else /* MBEDTLS_SHA256_ALT */
+#include "sha256_alt.h"
+#endif /* MBEDTLS_SHA256_ALT */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * \brief Output = SHA-256( input buffer )
+ *
+ * \param input buffer holding the data
+ * \param ilen length of the input data
+ * \param output SHA-224/256 checksum result
+ * \param is224 0 = use SHA256, 1 = use SHA224
+ */
+void mbedtls_sha256( const unsigned char *input, size_t ilen,
+ unsigned char output[32], int is224 );
+
+/**
+ * \brief Checkup routine
+ *
+ * \return 0 if successful, or 1 if the test failed
+ */
+int mbedtls_sha256_self_test( int verbose );
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* mbedtls_sha256.h */