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/* SPDX-License-Identifier: GPL-2.0-or-later */
/* X.509 certificate parser internal definitions
*
* Copyright (C) 2012 Red Hat, Inc. All Rights Reserved.
* Written by David Howells (dhowells@redhat.com)
*/
#ifndef _X509_PARSER_H
#define _X509_PARSER_H
#include <linux/time.h>
#include <crypto/public_key.h>
#include <keys/asymmetric-type.h>
#if CONFIG_IS_ENABLED(MBEDTLS_LIB_X509)
#include <image.h>
#include <mbedtls/error.h>
#include <mbedtls/asn1.h>
#endif
#if CONFIG_IS_ENABLED(MBEDTLS_LIB_X509)
struct x509_cert_mbedtls_ctx {
void *tbs; /* Signed data */
void *raw_serial; /* Raw serial number in ASN.1 */
void *raw_issuer; /* Raw issuer name in ASN.1 */
void *raw_subject; /* Raw subject name in ASN.1 */
void *raw_skid; /* Raw subjectKeyId in ASN.1 */
};
#endif
/*
* MbedTLS integration Notes:
*
* Fields we don't need to populate from MbedTLS context:
* 'raw_sig' and 'raw_sig_size' are buffer for x509_parse_context,
* not needed for MbedTLS.
* 'signer' and 'seen' are used internally by pkcs7_verify.
* 'verified' is not in use.
*/
struct x509_certificate {
#if CONFIG_IS_ENABLED(MBEDTLS_LIB_X509)
struct x509_cert_mbedtls_ctx *mbedtls_ctx;
#endif
struct x509_certificate *next;
struct x509_certificate *signer; /* Certificate that signed this one */
struct public_key *pub; /* Public key details */
struct public_key_signature *sig; /* Signature parameters */
char *issuer; /* Name of certificate issuer */
char *subject; /* Name of certificate subject */
struct asymmetric_key_id *id; /* Issuer + Serial number */
struct asymmetric_key_id *skid; /* Subject + subjectKeyId (optional) */
time64_t valid_from;
time64_t valid_to;
const void *tbs; /* Signed data */
unsigned tbs_size; /* Size of signed data */
unsigned raw_sig_size; /* Size of sigature */
const void *raw_sig; /* Signature data */
const void *raw_serial; /* Raw serial number in ASN.1 */
unsigned raw_serial_size;
unsigned raw_issuer_size;
const void *raw_issuer; /* Raw issuer name in ASN.1 */
const void *raw_subject; /* Raw subject name in ASN.1 */
unsigned raw_subject_size;
unsigned raw_skid_size;
const void *raw_skid; /* Raw subjectKeyId in ASN.1 */
unsigned index;
bool seen; /* Infinite recursion prevention */
bool verified;
bool self_signed; /* T if self-signed (check unsupported_sig too) */
bool unsupported_key; /* T if key uses unsupported crypto */
bool unsupported_sig; /* T if signature uses unsupported crypto */
bool blacklisted;
};
/*
* x509_cert_parser.c
*/
extern void x509_free_certificate(struct x509_certificate *cert);
#if CONFIG_IS_ENABLED(MBEDTLS_LIB_X509)
/**
* x509_populate_pubkey() - Populate public key from MbedTLS context
*
* @cert: Pointer to MbedTLS X509 cert
* @pub_key: Pointer to the populated public key handle
* Return: 0 on succcess, error code on failure
*/
int x509_populate_pubkey(mbedtls_x509_crt *cert, struct public_key **pub_key);
/**
* x509_populate_cert() - Populate X509 cert from MbedTLS context
*
* @mbedtls_cert: Pointer to MbedTLS X509 cert
* @pcert: Pointer to the populated X509 cert handle
* Return: 0 on succcess, error code on failure
*/
int x509_populate_cert(mbedtls_x509_crt *mbedtls_cert,
struct x509_certificate **pcert);
/**
* x509_get_timestamp() - Translate timestamp from MbedTLS context
*
* @x509_time: Pointer to MbedTLS time
* Return: Time in time64_t format
*/
time64_t x509_get_timestamp(const mbedtls_x509_time *x509_time);
#endif
extern struct x509_certificate *x509_cert_parse(const void *data, size_t datalen);
extern int x509_decode_time(time64_t *_t, size_t hdrlen,
unsigned char tag,
const unsigned char *value, size_t vlen);
/*
* x509_public_key.c
*/
#if !CONFIG_IS_ENABLED(MBEDTLS_LIB_X509)
extern int x509_get_sig_params(struct x509_certificate *cert);
#endif
extern int x509_check_for_self_signed(struct x509_certificate *cert);
#endif /* _X509_PARSER_H */
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