Squashed 'lib/mbedtls/external/mbedtls/' content from commit 2ca6c285a0dd

git-subtree-dir: lib/mbedtls/external/mbedtls
git-subtree-split: 2ca6c285a0dd3f33982dd57299012dacab1ff206

1 files changed, 321 insertions, 0 deletions

diff --git a/library/psa_crypto_ffdh.c b/library/psa_crypto_ffdh.c
new file mode 100644
index 00000000000..ae38f6d7c6d
--- /dev/null
+++ b/library/psa_crypto_ffdh.c
@@ -0,0 +1,321 @@
+/*
+ *  PSA FFDH layer on top of Mbed TLS crypto
+ */
+/*
+ *  Copyright The Mbed TLS Contributors
+ *  SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
+ */
+
+#include "common.h"
+
+#if defined(MBEDTLS_PSA_CRYPTO_C)
+
+/* This header is only needed because it defines
+ * MBEDTLS_DHM_RFC7919_FFDHEXXXX_[P|G]_BIN symbols that are used in
+ * mbedtls_psa_ffdh_set_prime_generator(). Apart from that, this module
+ * only uses bignum functions for arithmetic. */
+#include <mbedtls/dhm.h>
+
+#include <psa/crypto.h>
+#include "psa_crypto_core.h"
+#include "psa_crypto_ffdh.h"
+#include "psa_crypto_random_impl.h"
+#include "mbedtls/platform.h"
+#include "mbedtls/error.h"
+
+#if defined(MBEDTLS_PSA_BUILTIN_KEY_TYPE_DH_KEY_PAIR_EXPORT) ||   \
+    defined(MBEDTLS_PSA_BUILTIN_KEY_TYPE_DH_KEY_PAIR_GENERATE) ||   \
+    defined(MBEDTLS_PSA_BUILTIN_KEY_TYPE_DH_PUBLIC_KEY) || \
+    defined(MBEDTLS_PSA_BUILTIN_ALG_FFDH)
+static psa_status_t mbedtls_psa_ffdh_set_prime_generator(size_t key_size,
+                                                         mbedtls_mpi *P,
+                                                         mbedtls_mpi *G)
+{
+    const unsigned char *dhm_P = NULL;
+    const unsigned char *dhm_G = NULL;
+    size_t dhm_size_P = 0;
+    size_t dhm_size_G = 0;
+    int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
+
+    if (P == NULL && G == NULL) {
+        return PSA_ERROR_INVALID_ARGUMENT;
+    }
+
+#if defined(MBEDTLS_PSA_BUILTIN_DH_RFC7919_2048)
+    static const unsigned char dhm_P_2048[] =
+        MBEDTLS_DHM_RFC7919_FFDHE2048_P_BIN;
+    static const unsigned char dhm_G_2048[] =
+        MBEDTLS_DHM_RFC7919_FFDHE2048_G_BIN;
+#endif /* MBEDTLS_PSA_BUILTIN_DH_RFC7919_2048 */
+#if defined(MBEDTLS_PSA_BUILTIN_DH_RFC7919_3072)
+    static const unsigned char dhm_P_3072[] =
+        MBEDTLS_DHM_RFC7919_FFDHE3072_P_BIN;
+    static const unsigned char dhm_G_3072[] =
+        MBEDTLS_DHM_RFC7919_FFDHE3072_G_BIN;
+#endif /* MBEDTLS_PSA_BUILTIN_DH_RFC7919_3072 */
+#if defined(MBEDTLS_PSA_BUILTIN_DH_RFC7919_4096)
+    static const unsigned char dhm_P_4096[] =
+        MBEDTLS_DHM_RFC7919_FFDHE4096_P_BIN;
+    static const unsigned char dhm_G_4096[] =
+        MBEDTLS_DHM_RFC7919_FFDHE4096_G_BIN;
+#endif /* MBEDTLS_PSA_BUILTIN_DH_RFC7919_4096 */
+#if defined(MBEDTLS_PSA_BUILTIN_DH_RFC7919_6144)
+    static const unsigned char dhm_P_6144[] =
+        MBEDTLS_DHM_RFC7919_FFDHE6144_P_BIN;
+    static const unsigned char dhm_G_6144[] =
+        MBEDTLS_DHM_RFC7919_FFDHE6144_G_BIN;
+#endif /* MBEDTLS_PSA_BUILTIN_DH_RFC7919_6144 */
+#if defined(MBEDTLS_PSA_BUILTIN_DH_RFC7919_8192)
+    static const unsigned char dhm_P_8192[] =
+        MBEDTLS_DHM_RFC7919_FFDHE8192_P_BIN;
+    static const unsigned char dhm_G_8192[] =
+        MBEDTLS_DHM_RFC7919_FFDHE8192_G_BIN;
+#endif /* MBEDTLS_PSA_BUILTIN_DH_RFC7919_8192 */
+
+    switch (key_size) {
+#if defined(MBEDTLS_PSA_BUILTIN_DH_RFC7919_2048)
+        case sizeof(dhm_P_2048):
+            dhm_P = dhm_P_2048;
+            dhm_G = dhm_G_2048;
+            dhm_size_P = sizeof(dhm_P_2048);
+            dhm_size_G = sizeof(dhm_G_2048);
+            break;
+#endif /* MBEDTLS_PSA_BUILTIN_DH_RFC7919_2048 */
+#if defined(MBEDTLS_PSA_BUILTIN_DH_RFC7919_3072)
+        case sizeof(dhm_P_3072):
+            dhm_P = dhm_P_3072;
+            dhm_G = dhm_G_3072;
+            dhm_size_P = sizeof(dhm_P_3072);
+            dhm_size_G = sizeof(dhm_G_3072);
+            break;
+#endif /* MBEDTLS_PSA_BUILTIN_DH_RFC7919_3072 */
+#if defined(MBEDTLS_PSA_BUILTIN_DH_RFC7919_4096)
+        case sizeof(dhm_P_4096):
+            dhm_P = dhm_P_4096;
+            dhm_G = dhm_G_4096;
+            dhm_size_P = sizeof(dhm_P_4096);
+            dhm_size_G = sizeof(dhm_G_4096);
+            break;
+#endif /* MBEDTLS_PSA_BUILTIN_DH_RFC7919_4096 */
+#if defined(MBEDTLS_PSA_BUILTIN_DH_RFC7919_6144)
+        case sizeof(dhm_P_6144):
+            dhm_P = dhm_P_6144;
+            dhm_G = dhm_G_6144;
+            dhm_size_P = sizeof(dhm_P_6144);
+            dhm_size_G = sizeof(dhm_G_6144);
+            break;
+#endif /* MBEDTLS_PSA_BUILTIN_DH_RFC7919_6144 */
+#if defined(MBEDTLS_PSA_BUILTIN_DH_RFC7919_8192)
+        case sizeof(dhm_P_8192):
+            dhm_P = dhm_P_8192;
+            dhm_G = dhm_G_8192;
+            dhm_size_P = sizeof(dhm_P_8192);
+            dhm_size_G = sizeof(dhm_G_8192);
+            break;
+#endif /* MBEDTLS_PSA_BUILTIN_DH_RFC7919_8192 */
+        default:
+            return PSA_ERROR_INVALID_ARGUMENT;
+    }
+
+    if (P != NULL) {
+        MBEDTLS_MPI_CHK(mbedtls_mpi_read_binary(P, dhm_P,
+                                                dhm_size_P));
+    }
+    if (G != NULL) {
+        MBEDTLS_MPI_CHK(mbedtls_mpi_read_binary(G, dhm_G,
+                                                dhm_size_G));
+    }
+
+cleanup:
+    if (ret != 0) {
+        return mbedtls_to_psa_error(ret);
+    }
+
+    return PSA_SUCCESS;
+}
+#endif /* MBEDTLS_PSA_BUILTIN_KEY_TYPE_DH_KEY_PAIR_EXPORT ||
+          MBEDTLS_PSA_BUILTIN_KEY_TYPE_DH_KEY_PAIR_GENERATE ||
+          MBEDTLS_PSA_BUILTIN_KEY_TYPE_DH_PUBLIC_KEY ||
+          MBEDTLS_PSA_BUILTIN_ALG_FFDH */
+
+#if defined(MBEDTLS_PSA_BUILTIN_KEY_TYPE_DH_KEY_PAIR_EXPORT) || \
+    defined(MBEDTLS_PSA_BUILTIN_KEY_TYPE_DH_PUBLIC_KEY)
+psa_status_t mbedtls_psa_ffdh_export_public_key(
+    const psa_key_attributes_t *attributes,
+    const uint8_t *key_buffer,
+    size_t key_buffer_size,
+    uint8_t *data,
+    size_t data_size,
+    size_t *data_length)
+{
+    int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
+    psa_status_t status = PSA_ERROR_CORRUPTION_DETECTED;
+    mbedtls_mpi GX, G, X, P;
+    psa_key_type_t type = attributes->type;
+
+    if (PSA_KEY_TYPE_IS_PUBLIC_KEY(type)) {
+        if (key_buffer_size > data_size) {
+            return PSA_ERROR_BUFFER_TOO_SMALL;
+        }
+        memcpy(data, key_buffer, key_buffer_size);
+        memset(data + key_buffer_size, 0,
+               data_size - key_buffer_size);
+        *data_length = key_buffer_size;
+        return PSA_SUCCESS;
+    }
+
+    mbedtls_mpi_init(&GX); mbedtls_mpi_init(&G);
+    mbedtls_mpi_init(&X); mbedtls_mpi_init(&P);
+
+    size_t key_len = PSA_BITS_TO_BYTES(attributes->bits);
+
+    status = mbedtls_psa_ffdh_set_prime_generator(key_len, &P, &G);
+
+    if (status != PSA_SUCCESS) {
+        goto cleanup;
+    }
+
+    MBEDTLS_MPI_CHK(mbedtls_mpi_read_binary(&X, key_buffer,
+                                            key_buffer_size));
+
+    MBEDTLS_MPI_CHK(mbedtls_mpi_exp_mod(&GX, &G, &X, &P, NULL));
+    MBEDTLS_MPI_CHK(mbedtls_mpi_write_binary(&GX, data, key_len));
+
+    *data_length = key_len;
+
+    ret = 0;
+cleanup:
+    mbedtls_mpi_free(&P); mbedtls_mpi_free(&G);
+    mbedtls_mpi_free(&X); mbedtls_mpi_free(&GX);
+
+    if (status == PSA_SUCCESS && ret != 0) {
+        status = mbedtls_to_psa_error(ret);
+    }
+
+    return status;
+}
+#endif /* MBEDTLS_PSA_BUILTIN_KEY_TYPE_DH_KEY_PAIR_EXPORT ||
+          MBEDTLS_PSA_BUILTIN_KEY_TYPE_DH_PUBLIC_KEY */
+
+#if defined(MBEDTLS_PSA_BUILTIN_KEY_TYPE_DH_KEY_PAIR_GENERATE)
+psa_status_t mbedtls_psa_ffdh_generate_key(
+    const psa_key_attributes_t *attributes,
+    uint8_t *key_buffer, size_t key_buffer_size, size_t *key_buffer_length)
+{
+    mbedtls_mpi X, P;
+    int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
+    psa_status_t status = PSA_ERROR_CORRUPTION_DETECTED;
+    mbedtls_mpi_init(&P); mbedtls_mpi_init(&X);
+    (void) attributes;
+
+    status = mbedtls_psa_ffdh_set_prime_generator(key_buffer_size, &P, NULL);
+
+    if (status != PSA_SUCCESS) {
+        goto cleanup;
+    }
+
+    /* RFC7919: Traditional finite field Diffie-Hellman has each peer choose their
+        secret exponent from the range [2, P-2].
+        Select random value in range [3, P-1] and decrease it by 1. */
+    MBEDTLS_MPI_CHK(mbedtls_mpi_random(&X, 3, &P, mbedtls_psa_get_random,
+                                       MBEDTLS_PSA_RANDOM_STATE));
+    MBEDTLS_MPI_CHK(mbedtls_mpi_sub_int(&X, &X, 1));
+    MBEDTLS_MPI_CHK(mbedtls_mpi_write_binary(&X, key_buffer, key_buffer_size));
+    *key_buffer_length = key_buffer_size;
+
+cleanup:
+    mbedtls_mpi_free(&P); mbedtls_mpi_free(&X);
+    if (status == PSA_SUCCESS && ret != 0) {
+        return mbedtls_to_psa_error(ret);
+    }
+
+    return status;
+}
+#endif /* MBEDTLS_PSA_BUILTIN_KEY_TYPE_DH_KEY_PAIR_GENERATE */
+
+#if defined(MBEDTLS_PSA_BUILTIN_KEY_TYPE_DH_KEY_PAIR_IMPORT)
+psa_status_t mbedtls_psa_ffdh_import_key(
+    const psa_key_attributes_t *attributes,
+    const uint8_t *data, size_t data_length,
+    uint8_t *key_buffer, size_t key_buffer_size,
+    size_t *key_buffer_length, size_t *bits)
+{
+    (void) attributes;
+
+    if (key_buffer_size < data_length) {
+        return PSA_ERROR_BUFFER_TOO_SMALL;
+    }
+    memcpy(key_buffer, data, data_length);
+    *key_buffer_length = data_length;
+    *bits = PSA_BYTES_TO_BITS(data_length);
+
+    return PSA_SUCCESS;
+}
+#endif /* MBEDTLS_PSA_BUILTIN_KEY_TYPE_DH_KEY_PAIR_IMPORT */
+
+#if defined(MBEDTLS_PSA_BUILTIN_ALG_FFDH)
+psa_status_t mbedtls_psa_ffdh_key_agreement(
+    const psa_key_attributes_t *attributes,
+    const uint8_t *peer_key,
+    size_t peer_key_length,
+    const uint8_t *key_buffer,
+    size_t key_buffer_size,
+    uint8_t *shared_secret,
+    size_t shared_secret_size,
+    size_t *shared_secret_length)
+{
+    int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
+    psa_status_t status = PSA_ERROR_CORRUPTION_DETECTED;
+    mbedtls_mpi P, G, X, GY, K;
+    const size_t calculated_shared_secret_size = peer_key_length;
+
+    if (peer_key_length != key_buffer_size ||
+        calculated_shared_secret_size > shared_secret_size) {
+        return PSA_ERROR_INVALID_ARGUMENT;
+    }
+
+    if (!PSA_KEY_TYPE_IS_DH_KEY_PAIR(psa_get_key_type(attributes))) {
+        return PSA_ERROR_INVALID_ARGUMENT;
+    }
+
+    mbedtls_mpi_init(&P); mbedtls_mpi_init(&G);
+    mbedtls_mpi_init(&X); mbedtls_mpi_init(&GY);
+    mbedtls_mpi_init(&K);
+
+    status = mbedtls_psa_ffdh_set_prime_generator(
+        PSA_BITS_TO_BYTES(attributes->bits), &P, &G);
+
+    if (status != PSA_SUCCESS) {
+        goto cleanup;
+    }
+
+    MBEDTLS_MPI_CHK(mbedtls_mpi_read_binary(&X, key_buffer,
+                                            key_buffer_size));
+
+    MBEDTLS_MPI_CHK(mbedtls_mpi_read_binary(&GY, peer_key,
+                                            peer_key_length));
+
+    /* Calculate shared secret public key: K = G^(XY) mod P = GY^X mod P */
+    MBEDTLS_MPI_CHK(mbedtls_mpi_exp_mod(&K, &GY, &X, &P, NULL));
+
+    MBEDTLS_MPI_CHK(mbedtls_mpi_write_binary(&K, shared_secret,
+                                             calculated_shared_secret_size));
+
+    *shared_secret_length = calculated_shared_secret_size;
+
+    ret = 0;
+
+cleanup:
+    mbedtls_mpi_free(&P); mbedtls_mpi_free(&G);
+    mbedtls_mpi_free(&X); mbedtls_mpi_free(&GY);
+    mbedtls_mpi_free(&K);
+
+    if (status == PSA_SUCCESS && ret != 0) {
+        status = mbedtls_to_psa_error(ret);
+    }
+
+    return status;
+}
+#endif /* MBEDTLS_PSA_BUILTIN_ALG_FFDH */
+
+#endif /* MBEDTLS_PSA_CRYPTO_C */