| /* |
| * Public Key abstraction layer: wrapper functions |
| * |
| * Copyright The Mbed TLS Contributors |
| * SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later |
| */ |
| |
| #include "common.h" |
| |
| #include "mbedtls/platform_util.h" |
| |
| #if defined(MBEDTLS_PK_C) |
| #include "pk_wrap.h" |
| #include "pk_internal.h" |
| #include "mbedtls/error.h" |
| #include "mbedtls/psa_util.h" |
| |
| /* Even if RSA not activated, for the sake of RSA-alt */ |
| #include "mbedtls/rsa.h" |
| |
| #if defined(MBEDTLS_ECP_C) |
| #include "mbedtls/ecp.h" |
| #endif |
| |
| #if defined(MBEDTLS_ECDSA_C) |
| #include "mbedtls/ecdsa.h" |
| #endif |
| |
| #if defined(MBEDTLS_USE_PSA_CRYPTO) |
| #include "psa_util_internal.h" |
| #include "psa/crypto.h" |
| #include "mbedtls/psa_util.h" |
| |
| #if defined(MBEDTLS_RSA_C) |
| #include "pkwrite.h" |
| #include "rsa_internal.h" |
| #endif |
| |
| #if defined(MBEDTLS_PK_CAN_ECDSA_SOME) |
| #include "mbedtls/asn1write.h" |
| #include "mbedtls/asn1.h" |
| #endif |
| #endif /* MBEDTLS_USE_PSA_CRYPTO */ |
| |
| #include "mbedtls/platform.h" |
| |
| #include <limits.h> |
| #include <stdint.h> |
| #include <string.h> |
| |
| #if defined(MBEDTLS_RSA_C) |
| static int rsa_can_do(mbedtls_pk_type_t type) |
| { |
| return type == MBEDTLS_PK_RSA || |
| type == MBEDTLS_PK_RSASSA_PSS; |
| } |
| |
| static size_t rsa_get_bitlen(mbedtls_pk_context *pk) |
| { |
| const mbedtls_rsa_context *rsa = (const mbedtls_rsa_context *) pk->pk_ctx; |
| return mbedtls_rsa_get_bitlen(rsa); |
| } |
| |
| #if defined(MBEDTLS_USE_PSA_CRYPTO) |
| static int rsa_verify_wrap(mbedtls_pk_context *pk, mbedtls_md_type_t md_alg, |
| const unsigned char *hash, size_t hash_len, |
| const unsigned char *sig, size_t sig_len) |
| { |
| mbedtls_rsa_context *rsa = (mbedtls_rsa_context *) pk->pk_ctx; |
| int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; |
| psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT; |
| mbedtls_svc_key_id_t key_id = MBEDTLS_SVC_KEY_ID_INIT; |
| psa_status_t status; |
| int key_len; |
| unsigned char buf[MBEDTLS_PK_RSA_PUB_DER_MAX_BYTES]; |
| unsigned char *p = buf + sizeof(buf); |
| psa_algorithm_t psa_alg_md; |
| size_t rsa_len = mbedtls_rsa_get_len(rsa); |
| |
| #if SIZE_MAX > UINT_MAX |
| if (md_alg == MBEDTLS_MD_NONE && UINT_MAX < hash_len) { |
| return MBEDTLS_ERR_PK_BAD_INPUT_DATA; |
| } |
| #endif |
| |
| if (mbedtls_rsa_get_padding_mode(rsa) == MBEDTLS_RSA_PKCS_V21) { |
| psa_alg_md = PSA_ALG_RSA_PSS(mbedtls_md_psa_alg_from_type(md_alg)); |
| } else { |
| psa_alg_md = PSA_ALG_RSA_PKCS1V15_SIGN(mbedtls_md_psa_alg_from_type(md_alg)); |
| } |
| |
| if (sig_len < rsa_len) { |
| return MBEDTLS_ERR_RSA_VERIFY_FAILED; |
| } |
| |
| key_len = mbedtls_rsa_write_pubkey(rsa, buf, &p); |
| if (key_len <= 0) { |
| return MBEDTLS_ERR_PK_BAD_INPUT_DATA; |
| } |
| |
| psa_set_key_usage_flags(&attributes, PSA_KEY_USAGE_VERIFY_HASH); |
| psa_set_key_algorithm(&attributes, psa_alg_md); |
| psa_set_key_type(&attributes, PSA_KEY_TYPE_RSA_PUBLIC_KEY); |
| |
| status = psa_import_key(&attributes, |
| buf + sizeof(buf) - key_len, key_len, |
| &key_id); |
| if (status != PSA_SUCCESS) { |
| ret = PSA_PK_TO_MBEDTLS_ERR(status); |
| goto cleanup; |
| } |
| |
| status = psa_verify_hash(key_id, psa_alg_md, hash, hash_len, |
| sig, sig_len); |
| if (status != PSA_SUCCESS) { |
| ret = PSA_PK_RSA_TO_MBEDTLS_ERR(status); |
| goto cleanup; |
| } |
| ret = 0; |
| |
| cleanup: |
| status = psa_destroy_key(key_id); |
| if (ret == 0 && status != PSA_SUCCESS) { |
| ret = PSA_PK_TO_MBEDTLS_ERR(status); |
| } |
| |
| return ret; |
| } |
| #else /* MBEDTLS_USE_PSA_CRYPTO */ |
| static int rsa_verify_wrap(mbedtls_pk_context *pk, mbedtls_md_type_t md_alg, |
| const unsigned char *hash, size_t hash_len, |
| const unsigned char *sig, size_t sig_len) |
| { |
| int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; |
| mbedtls_rsa_context *rsa = (mbedtls_rsa_context *) pk->pk_ctx; |
| size_t rsa_len = mbedtls_rsa_get_len(rsa); |
| |
| #if SIZE_MAX > UINT_MAX |
| if (md_alg == MBEDTLS_MD_NONE && UINT_MAX < hash_len) { |
| return MBEDTLS_ERR_PK_BAD_INPUT_DATA; |
| } |
| #endif |
| |
| if (sig_len < rsa_len) { |
| return MBEDTLS_ERR_RSA_VERIFY_FAILED; |
| } |
| |
| if ((ret = mbedtls_rsa_pkcs1_verify(rsa, md_alg, |
| (unsigned int) hash_len, |
| hash, sig)) != 0) { |
| return ret; |
| } |
| |
| /* The buffer contains a valid signature followed by extra data. |
| * We have a special error code for that so that so that callers can |
| * use mbedtls_pk_verify() to check "Does the buffer start with a |
| * valid signature?" and not just "Does the buffer contain a valid |
| * signature?". */ |
| if (sig_len > rsa_len) { |
| return MBEDTLS_ERR_PK_SIG_LEN_MISMATCH; |
| } |
| |
| return 0; |
| } |
| #endif /* MBEDTLS_USE_PSA_CRYPTO */ |
| |
| #if defined(MBEDTLS_USE_PSA_CRYPTO) |
| int mbedtls_pk_psa_rsa_sign_ext(psa_algorithm_t alg, |
| mbedtls_rsa_context *rsa_ctx, |
| const unsigned char *hash, size_t hash_len, |
| unsigned char *sig, size_t sig_size, |
| size_t *sig_len) |
| { |
| int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; |
| psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT; |
| mbedtls_svc_key_id_t key_id = MBEDTLS_SVC_KEY_ID_INIT; |
| psa_status_t status; |
| int key_len; |
| unsigned char *buf = NULL; |
| unsigned char *p; |
| |
| buf = mbedtls_calloc(1, MBEDTLS_PK_RSA_PRV_DER_MAX_BYTES); |
| if (buf == NULL) { |
| return MBEDTLS_ERR_PK_ALLOC_FAILED; |
| } |
| p = buf + MBEDTLS_PK_RSA_PRV_DER_MAX_BYTES; |
| |
| *sig_len = mbedtls_rsa_get_len(rsa_ctx); |
| if (sig_size < *sig_len) { |
| mbedtls_free(buf); |
| return MBEDTLS_ERR_PK_BUFFER_TOO_SMALL; |
| } |
| |
| key_len = mbedtls_rsa_write_key(rsa_ctx, buf, &p); |
| if (key_len <= 0) { |
| mbedtls_free(buf); |
| return MBEDTLS_ERR_PK_BAD_INPUT_DATA; |
| } |
| psa_set_key_usage_flags(&attributes, PSA_KEY_USAGE_SIGN_HASH); |
| psa_set_key_algorithm(&attributes, alg); |
| psa_set_key_type(&attributes, PSA_KEY_TYPE_RSA_KEY_PAIR); |
| |
| status = psa_import_key(&attributes, |
| buf + MBEDTLS_PK_RSA_PRV_DER_MAX_BYTES - key_len, key_len, |
| &key_id); |
| if (status != PSA_SUCCESS) { |
| ret = PSA_PK_TO_MBEDTLS_ERR(status); |
| goto cleanup; |
| } |
| status = psa_sign_hash(key_id, alg, hash, hash_len, |
| sig, sig_size, sig_len); |
| if (status != PSA_SUCCESS) { |
| ret = PSA_PK_RSA_TO_MBEDTLS_ERR(status); |
| goto cleanup; |
| } |
| |
| ret = 0; |
| |
| cleanup: |
| mbedtls_free(buf); |
| status = psa_destroy_key(key_id); |
| if (ret == 0 && status != PSA_SUCCESS) { |
| ret = PSA_PK_TO_MBEDTLS_ERR(status); |
| } |
| return ret; |
| } |
| #endif /* MBEDTLS_USE_PSA_CRYPTO */ |
| |
| #if defined(MBEDTLS_USE_PSA_CRYPTO) |
| static int rsa_sign_wrap(mbedtls_pk_context *pk, mbedtls_md_type_t md_alg, |
| const unsigned char *hash, size_t hash_len, |
| unsigned char *sig, size_t sig_size, size_t *sig_len, |
| int (*f_rng)(void *, unsigned char *, size_t), void *p_rng) |
| { |
| ((void) f_rng); |
| ((void) p_rng); |
| |
| psa_algorithm_t psa_md_alg; |
| psa_md_alg = mbedtls_md_psa_alg_from_type(md_alg); |
| if (psa_md_alg == 0) { |
| return MBEDTLS_ERR_PK_BAD_INPUT_DATA; |
| } |
| psa_algorithm_t psa_alg; |
| if (mbedtls_rsa_get_padding_mode(mbedtls_pk_rsa(*pk)) == MBEDTLS_RSA_PKCS_V21) { |
| psa_alg = PSA_ALG_RSA_PSS(psa_md_alg); |
| } else { |
| psa_alg = PSA_ALG_RSA_PKCS1V15_SIGN(psa_md_alg); |
| } |
| |
| return mbedtls_pk_psa_rsa_sign_ext(psa_alg, pk->pk_ctx, hash, hash_len, |
| sig, sig_size, sig_len); |
| } |
| #else /* MBEDTLS_USE_PSA_CRYPTO */ |
| static int rsa_sign_wrap(mbedtls_pk_context *pk, mbedtls_md_type_t md_alg, |
| const unsigned char *hash, size_t hash_len, |
| unsigned char *sig, size_t sig_size, size_t *sig_len, |
| int (*f_rng)(void *, unsigned char *, size_t), void *p_rng) |
| { |
| mbedtls_rsa_context *rsa = (mbedtls_rsa_context *) pk->pk_ctx; |
| |
| #if SIZE_MAX > UINT_MAX |
| if (md_alg == MBEDTLS_MD_NONE && UINT_MAX < hash_len) { |
| return MBEDTLS_ERR_PK_BAD_INPUT_DATA; |
| } |
| #endif |
| |
| *sig_len = mbedtls_rsa_get_len(rsa); |
| if (sig_size < *sig_len) { |
| return MBEDTLS_ERR_PK_BUFFER_TOO_SMALL; |
| } |
| |
| return mbedtls_rsa_pkcs1_sign(rsa, f_rng, p_rng, |
| md_alg, (unsigned int) hash_len, |
| hash, sig); |
| } |
| #endif /* MBEDTLS_USE_PSA_CRYPTO */ |
| |
| #if defined(MBEDTLS_USE_PSA_CRYPTO) |
| static int rsa_decrypt_wrap(mbedtls_pk_context *pk, |
| 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) |
| { |
| mbedtls_rsa_context *rsa = (mbedtls_rsa_context *) pk->pk_ctx; |
| int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; |
| psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT; |
| mbedtls_svc_key_id_t key_id = MBEDTLS_SVC_KEY_ID_INIT; |
| psa_algorithm_t psa_md_alg, decrypt_alg; |
| psa_status_t status; |
| int key_len; |
| unsigned char buf[MBEDTLS_PK_RSA_PRV_DER_MAX_BYTES]; |
| unsigned char *p = buf + sizeof(buf); |
| |
| ((void) f_rng); |
| ((void) p_rng); |
| |
| if (ilen != mbedtls_rsa_get_len(rsa)) { |
| return MBEDTLS_ERR_RSA_BAD_INPUT_DATA; |
| } |
| |
| key_len = mbedtls_rsa_write_key(rsa, buf, &p); |
| if (key_len <= 0) { |
| return MBEDTLS_ERR_PK_BAD_INPUT_DATA; |
| } |
| |
| psa_set_key_type(&attributes, PSA_KEY_TYPE_RSA_KEY_PAIR); |
| psa_set_key_usage_flags(&attributes, PSA_KEY_USAGE_DECRYPT); |
| if (mbedtls_rsa_get_padding_mode(rsa) == MBEDTLS_RSA_PKCS_V21) { |
| psa_md_alg = mbedtls_md_psa_alg_from_type((mbedtls_md_type_t) mbedtls_rsa_get_md_alg(rsa)); |
| decrypt_alg = PSA_ALG_RSA_OAEP(psa_md_alg); |
| } else { |
| decrypt_alg = PSA_ALG_RSA_PKCS1V15_CRYPT; |
| } |
| psa_set_key_algorithm(&attributes, decrypt_alg); |
| |
| status = psa_import_key(&attributes, |
| buf + sizeof(buf) - key_len, key_len, |
| &key_id); |
| if (status != PSA_SUCCESS) { |
| ret = PSA_PK_TO_MBEDTLS_ERR(status); |
| goto cleanup; |
| } |
| |
| status = psa_asymmetric_decrypt(key_id, decrypt_alg, |
| input, ilen, |
| NULL, 0, |
| output, osize, olen); |
| if (status != PSA_SUCCESS) { |
| ret = PSA_PK_RSA_TO_MBEDTLS_ERR(status); |
| goto cleanup; |
| } |
| |
| ret = 0; |
| |
| cleanup: |
| mbedtls_platform_zeroize(buf, sizeof(buf)); |
| status = psa_destroy_key(key_id); |
| if (ret == 0 && status != PSA_SUCCESS) { |
| ret = PSA_PK_TO_MBEDTLS_ERR(status); |
| } |
| |
| return ret; |
| } |
| #else /* MBEDTLS_USE_PSA_CRYPTO */ |
| static int rsa_decrypt_wrap(mbedtls_pk_context *pk, |
| 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) |
| { |
| mbedtls_rsa_context *rsa = (mbedtls_rsa_context *) pk->pk_ctx; |
| |
| if (ilen != mbedtls_rsa_get_len(rsa)) { |
| return MBEDTLS_ERR_RSA_BAD_INPUT_DATA; |
| } |
| |
| return mbedtls_rsa_pkcs1_decrypt(rsa, f_rng, p_rng, |
| olen, input, output, osize); |
| } |
| #endif /* MBEDTLS_USE_PSA_CRYPTO */ |
| |
| #if defined(MBEDTLS_USE_PSA_CRYPTO) |
| static int rsa_encrypt_wrap(mbedtls_pk_context *pk, |
| 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) |
| { |
| mbedtls_rsa_context *rsa = (mbedtls_rsa_context *) pk->pk_ctx; |
| int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; |
| psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT; |
| mbedtls_svc_key_id_t key_id = MBEDTLS_SVC_KEY_ID_INIT; |
| psa_algorithm_t psa_md_alg, psa_encrypt_alg; |
| psa_status_t status; |
| int key_len; |
| unsigned char buf[MBEDTLS_PK_RSA_PUB_DER_MAX_BYTES]; |
| unsigned char *p = buf + sizeof(buf); |
| |
| ((void) f_rng); |
| ((void) p_rng); |
| |
| if (mbedtls_rsa_get_len(rsa) > osize) { |
| return MBEDTLS_ERR_RSA_OUTPUT_TOO_LARGE; |
| } |
| |
| key_len = mbedtls_rsa_write_pubkey(rsa, buf, &p); |
| if (key_len <= 0) { |
| return MBEDTLS_ERR_PK_BAD_INPUT_DATA; |
| } |
| |
| psa_set_key_usage_flags(&attributes, PSA_KEY_USAGE_ENCRYPT); |
| if (mbedtls_rsa_get_padding_mode(rsa) == MBEDTLS_RSA_PKCS_V21) { |
| psa_md_alg = mbedtls_md_psa_alg_from_type((mbedtls_md_type_t) mbedtls_rsa_get_md_alg(rsa)); |
| psa_encrypt_alg = PSA_ALG_RSA_OAEP(psa_md_alg); |
| } else { |
| psa_encrypt_alg = PSA_ALG_RSA_PKCS1V15_CRYPT; |
| } |
| psa_set_key_algorithm(&attributes, psa_encrypt_alg); |
| psa_set_key_type(&attributes, PSA_KEY_TYPE_RSA_PUBLIC_KEY); |
| |
| status = psa_import_key(&attributes, |
| buf + sizeof(buf) - key_len, key_len, |
| &key_id); |
| if (status != PSA_SUCCESS) { |
| ret = PSA_PK_TO_MBEDTLS_ERR(status); |
| goto cleanup; |
| } |
| |
| status = psa_asymmetric_encrypt(key_id, psa_encrypt_alg, |
| input, ilen, |
| NULL, 0, |
| output, osize, olen); |
| if (status != PSA_SUCCESS) { |
| ret = PSA_PK_RSA_TO_MBEDTLS_ERR(status); |
| goto cleanup; |
| } |
| |
| ret = 0; |
| |
| cleanup: |
| status = psa_destroy_key(key_id); |
| if (ret == 0 && status != PSA_SUCCESS) { |
| ret = PSA_PK_TO_MBEDTLS_ERR(status); |
| } |
| |
| return ret; |
| } |
| #else /* MBEDTLS_USE_PSA_CRYPTO */ |
| static int rsa_encrypt_wrap(mbedtls_pk_context *pk, |
| 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) |
| { |
| mbedtls_rsa_context *rsa = (mbedtls_rsa_context *) pk->pk_ctx; |
| *olen = mbedtls_rsa_get_len(rsa); |
| |
| if (*olen > osize) { |
| return MBEDTLS_ERR_RSA_OUTPUT_TOO_LARGE; |
| } |
| |
| return mbedtls_rsa_pkcs1_encrypt(rsa, f_rng, p_rng, |
| ilen, input, output); |
| } |
| #endif /* MBEDTLS_USE_PSA_CRYPTO */ |
| |
| static int rsa_check_pair_wrap(mbedtls_pk_context *pub, mbedtls_pk_context *prv, |
| int (*f_rng)(void *, unsigned char *, size_t), |
| void *p_rng) |
| { |
| (void) f_rng; |
| (void) p_rng; |
| return mbedtls_rsa_check_pub_priv((const mbedtls_rsa_context *) pub->pk_ctx, |
| (const mbedtls_rsa_context *) prv->pk_ctx); |
| } |
| |
| static void *rsa_alloc_wrap(void) |
| { |
| void *ctx = mbedtls_calloc(1, sizeof(mbedtls_rsa_context)); |
| |
| if (ctx != NULL) { |
| mbedtls_rsa_init((mbedtls_rsa_context *) ctx); |
| } |
| |
| return ctx; |
| } |
| |
| static void rsa_free_wrap(void *ctx) |
| { |
| mbedtls_rsa_free((mbedtls_rsa_context *) ctx); |
| mbedtls_free(ctx); |
| } |
| |
| static void rsa_debug(mbedtls_pk_context *pk, mbedtls_pk_debug_item *items) |
| { |
| #if defined(MBEDTLS_RSA_ALT) |
| /* Not supported */ |
| (void) pk; |
| (void) items; |
| #else |
| mbedtls_rsa_context *rsa = (mbedtls_rsa_context *) pk->pk_ctx; |
| |
| items->type = MBEDTLS_PK_DEBUG_MPI; |
| items->name = "rsa.N"; |
| items->value = &(rsa->N); |
| |
| items++; |
| |
| items->type = MBEDTLS_PK_DEBUG_MPI; |
| items->name = "rsa.E"; |
| items->value = &(rsa->E); |
| #endif |
| } |
| |
| const mbedtls_pk_info_t mbedtls_rsa_info = { |
| .type = MBEDTLS_PK_RSA, |
| .name = "RSA", |
| .get_bitlen = rsa_get_bitlen, |
| .can_do = rsa_can_do, |
| .verify_func = rsa_verify_wrap, |
| .sign_func = rsa_sign_wrap, |
| #if defined(MBEDTLS_ECDSA_C) && defined(MBEDTLS_ECP_RESTARTABLE) |
| .verify_rs_func = NULL, |
| .sign_rs_func = NULL, |
| .rs_alloc_func = NULL, |
| .rs_free_func = NULL, |
| #endif /* MBEDTLS_ECDSA_C && MBEDTLS_ECP_RESTARTABLE */ |
| .decrypt_func = rsa_decrypt_wrap, |
| .encrypt_func = rsa_encrypt_wrap, |
| .check_pair_func = rsa_check_pair_wrap, |
| .ctx_alloc_func = rsa_alloc_wrap, |
| .ctx_free_func = rsa_free_wrap, |
| .debug_func = rsa_debug, |
| }; |
| #endif /* MBEDTLS_RSA_C */ |
| |
| #if defined(MBEDTLS_PK_HAVE_ECC_KEYS) |
| /* |
| * Generic EC key |
| */ |
| static int eckey_can_do(mbedtls_pk_type_t type) |
| { |
| return type == MBEDTLS_PK_ECKEY || |
| type == MBEDTLS_PK_ECKEY_DH || |
| type == MBEDTLS_PK_ECDSA; |
| } |
| |
| static size_t eckey_get_bitlen(mbedtls_pk_context *pk) |
| { |
| #if defined(MBEDTLS_PK_USE_PSA_EC_DATA) |
| return pk->ec_bits; |
| #else /* MBEDTLS_PK_USE_PSA_EC_DATA */ |
| mbedtls_ecp_keypair *ecp = (mbedtls_ecp_keypair *) pk->pk_ctx; |
| return ecp->grp.pbits; |
| #endif /* MBEDTLS_PK_USE_PSA_EC_DATA */ |
| } |
| |
| #if defined(MBEDTLS_PK_CAN_ECDSA_VERIFY) |
| #if defined(MBEDTLS_USE_PSA_CRYPTO) |
| /* Common helper for ECDSA verify using PSA functions. */ |
| static int ecdsa_verify_psa(unsigned char *key, size_t key_len, |
| psa_ecc_family_t curve, size_t curve_bits, |
| const unsigned char *hash, size_t hash_len, |
| const unsigned char *sig, size_t sig_len) |
| { |
| int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; |
| psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT; |
| mbedtls_svc_key_id_t key_id = MBEDTLS_SVC_KEY_ID_INIT; |
| psa_algorithm_t psa_sig_md = PSA_ALG_ECDSA_ANY; |
| size_t signature_len = PSA_ECDSA_SIGNATURE_SIZE(curve_bits); |
| size_t converted_sig_len; |
| unsigned char extracted_sig[PSA_VENDOR_ECDSA_SIGNATURE_MAX_SIZE]; |
| unsigned char *p; |
| psa_status_t status; |
| |
| if (curve == 0) { |
| return MBEDTLS_ERR_PK_BAD_INPUT_DATA; |
| } |
| |
| psa_set_key_type(&attributes, PSA_KEY_TYPE_ECC_PUBLIC_KEY(curve)); |
| psa_set_key_usage_flags(&attributes, PSA_KEY_USAGE_VERIFY_HASH); |
| psa_set_key_algorithm(&attributes, psa_sig_md); |
| |
| status = psa_import_key(&attributes, key, key_len, &key_id); |
| if (status != PSA_SUCCESS) { |
| ret = PSA_PK_TO_MBEDTLS_ERR(status); |
| goto cleanup; |
| } |
| |
| if (signature_len > sizeof(extracted_sig)) { |
| ret = MBEDTLS_ERR_PK_BAD_INPUT_DATA; |
| goto cleanup; |
| } |
| |
| p = (unsigned char *) sig; |
| ret = mbedtls_ecdsa_der_to_raw(curve_bits, p, sig_len, extracted_sig, |
| sizeof(extracted_sig), &converted_sig_len); |
| if (ret != 0) { |
| goto cleanup; |
| } |
| |
| if (converted_sig_len != signature_len) { |
| ret = MBEDTLS_ERR_PK_BAD_INPUT_DATA; |
| goto cleanup; |
| } |
| |
| status = psa_verify_hash(key_id, psa_sig_md, hash, hash_len, |
| extracted_sig, signature_len); |
| if (status != PSA_SUCCESS) { |
| ret = PSA_PK_ECDSA_TO_MBEDTLS_ERR(status); |
| goto cleanup; |
| } |
| |
| ret = 0; |
| |
| cleanup: |
| status = psa_destroy_key(key_id); |
| if (ret == 0 && status != PSA_SUCCESS) { |
| ret = PSA_PK_TO_MBEDTLS_ERR(status); |
| } |
| |
| return ret; |
| } |
| |
| static int ecdsa_opaque_verify_wrap(mbedtls_pk_context *pk, |
| mbedtls_md_type_t md_alg, |
| const unsigned char *hash, size_t hash_len, |
| const unsigned char *sig, size_t sig_len) |
| { |
| (void) md_alg; |
| unsigned char key[MBEDTLS_PK_MAX_EC_PUBKEY_RAW_LEN]; |
| size_t key_len; |
| psa_key_attributes_t key_attr = PSA_KEY_ATTRIBUTES_INIT; |
| psa_ecc_family_t curve; |
| size_t curve_bits; |
| psa_status_t status; |
| |
| status = psa_get_key_attributes(pk->priv_id, &key_attr); |
| if (status != PSA_SUCCESS) { |
| return PSA_PK_ECDSA_TO_MBEDTLS_ERR(status); |
| } |
| curve = PSA_KEY_TYPE_ECC_GET_FAMILY(psa_get_key_type(&key_attr)); |
| curve_bits = psa_get_key_bits(&key_attr); |
| psa_reset_key_attributes(&key_attr); |
| |
| status = psa_export_public_key(pk->priv_id, key, sizeof(key), &key_len); |
| if (status != PSA_SUCCESS) { |
| return PSA_PK_ECDSA_TO_MBEDTLS_ERR(status); |
| } |
| |
| return ecdsa_verify_psa(key, key_len, curve, curve_bits, |
| hash, hash_len, sig, sig_len); |
| } |
| |
| #if defined(MBEDTLS_PK_USE_PSA_EC_DATA) |
| static int ecdsa_verify_wrap(mbedtls_pk_context *pk, |
| mbedtls_md_type_t md_alg, |
| const unsigned char *hash, size_t hash_len, |
| const unsigned char *sig, size_t sig_len) |
| { |
| (void) md_alg; |
| psa_ecc_family_t curve = pk->ec_family; |
| size_t curve_bits = pk->ec_bits; |
| |
| return ecdsa_verify_psa(pk->pub_raw, pk->pub_raw_len, curve, curve_bits, |
| hash, hash_len, sig, sig_len); |
| } |
| #else /* MBEDTLS_PK_USE_PSA_EC_DATA */ |
| static int ecdsa_verify_wrap(mbedtls_pk_context *pk, |
| mbedtls_md_type_t md_alg, |
| const unsigned char *hash, size_t hash_len, |
| const unsigned char *sig, size_t sig_len) |
| { |
| (void) md_alg; |
| int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; |
| mbedtls_ecp_keypair *ctx = pk->pk_ctx; |
| unsigned char key[MBEDTLS_PSA_MAX_EC_PUBKEY_LENGTH]; |
| size_t key_len; |
| size_t curve_bits; |
| psa_ecc_family_t curve = mbedtls_ecc_group_to_psa(ctx->grp.id, &curve_bits); |
| |
| ret = mbedtls_ecp_point_write_binary(&ctx->grp, &ctx->Q, |
| MBEDTLS_ECP_PF_UNCOMPRESSED, |
| &key_len, key, sizeof(key)); |
| if (ret != 0) { |
| return ret; |
| } |
| |
| return ecdsa_verify_psa(key, key_len, curve, curve_bits, |
| hash, hash_len, sig, sig_len); |
| } |
| #endif /* MBEDTLS_PK_USE_PSA_EC_DATA */ |
| #else /* MBEDTLS_USE_PSA_CRYPTO */ |
| static int ecdsa_verify_wrap(mbedtls_pk_context *pk, mbedtls_md_type_t md_alg, |
| const unsigned char *hash, size_t hash_len, |
| const unsigned char *sig, size_t sig_len) |
| { |
| int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; |
| ((void) md_alg); |
| |
| ret = mbedtls_ecdsa_read_signature((mbedtls_ecdsa_context *) pk->pk_ctx, |
| hash, hash_len, sig, sig_len); |
| |
| if (ret == MBEDTLS_ERR_ECP_SIG_LEN_MISMATCH) { |
| return MBEDTLS_ERR_PK_SIG_LEN_MISMATCH; |
| } |
| |
| return ret; |
| } |
| #endif /* MBEDTLS_USE_PSA_CRYPTO */ |
| #endif /* MBEDTLS_PK_CAN_ECDSA_VERIFY */ |
| |
| #if defined(MBEDTLS_PK_CAN_ECDSA_SIGN) |
| #if defined(MBEDTLS_USE_PSA_CRYPTO) |
| /* Common helper for ECDSA sign using PSA functions. |
| * Instead of extracting key's properties in order to check which kind of ECDSA |
| * signature it supports, we try both deterministic and non-deterministic. |
| */ |
| static int ecdsa_sign_psa(mbedtls_svc_key_id_t key_id, mbedtls_md_type_t md_alg, |
| const unsigned char *hash, size_t hash_len, |
| unsigned char *sig, size_t sig_size, size_t *sig_len) |
| { |
| int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; |
| psa_status_t status; |
| psa_key_attributes_t key_attr = PSA_KEY_ATTRIBUTES_INIT; |
| size_t key_bits = 0; |
| |
| status = psa_get_key_attributes(key_id, &key_attr); |
| if (status != PSA_SUCCESS) { |
| return PSA_PK_ECDSA_TO_MBEDTLS_ERR(status); |
| } |
| key_bits = psa_get_key_bits(&key_attr); |
| psa_reset_key_attributes(&key_attr); |
| |
| status = psa_sign_hash(key_id, |
| PSA_ALG_DETERMINISTIC_ECDSA(mbedtls_md_psa_alg_from_type(md_alg)), |
| hash, hash_len, sig, sig_size, sig_len); |
| if (status == PSA_SUCCESS) { |
| goto done; |
| } else if (status != PSA_ERROR_NOT_PERMITTED) { |
| return PSA_PK_ECDSA_TO_MBEDTLS_ERR(status); |
| } |
| |
| status = psa_sign_hash(key_id, |
| PSA_ALG_ECDSA(mbedtls_md_psa_alg_from_type(md_alg)), |
| hash, hash_len, sig, sig_size, sig_len); |
| if (status != PSA_SUCCESS) { |
| return PSA_PK_ECDSA_TO_MBEDTLS_ERR(status); |
| } |
| |
| done: |
| ret = mbedtls_ecdsa_raw_to_der(key_bits, sig, *sig_len, sig, sig_size, sig_len); |
| |
| return ret; |
| } |
| |
| static int ecdsa_opaque_sign_wrap(mbedtls_pk_context *pk, |
| mbedtls_md_type_t md_alg, |
| const unsigned char *hash, size_t hash_len, |
| unsigned char *sig, size_t sig_size, |
| size_t *sig_len, |
| int (*f_rng)(void *, unsigned char *, size_t), |
| void *p_rng) |
| { |
| ((void) f_rng); |
| ((void) p_rng); |
| |
| return ecdsa_sign_psa(pk->priv_id, md_alg, hash, hash_len, sig, sig_size, |
| sig_len); |
| } |
| |
| #if defined(MBEDTLS_PK_USE_PSA_EC_DATA) |
| /* When PK_USE_PSA_EC_DATA is defined opaque and non-opaque keys end up |
| * using the same function. */ |
| #define ecdsa_sign_wrap ecdsa_opaque_sign_wrap |
| #else /* MBEDTLS_PK_USE_PSA_EC_DATA */ |
| static int ecdsa_sign_wrap(mbedtls_pk_context *pk, mbedtls_md_type_t md_alg, |
| const unsigned char *hash, size_t hash_len, |
| unsigned char *sig, size_t sig_size, size_t *sig_len, |
| int (*f_rng)(void *, unsigned char *, size_t), void *p_rng) |
| { |
| int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; |
| mbedtls_svc_key_id_t key_id = MBEDTLS_SVC_KEY_ID_INIT; |
| psa_status_t status; |
| mbedtls_ecp_keypair *ctx = pk->pk_ctx; |
| psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT; |
| unsigned char buf[MBEDTLS_PSA_MAX_EC_KEY_PAIR_LENGTH]; |
| size_t curve_bits; |
| psa_ecc_family_t curve = |
| mbedtls_ecc_group_to_psa(ctx->grp.id, &curve_bits); |
| size_t key_len = PSA_BITS_TO_BYTES(curve_bits); |
| psa_algorithm_t psa_hash = mbedtls_md_psa_alg_from_type(md_alg); |
| psa_algorithm_t psa_sig_md = MBEDTLS_PK_PSA_ALG_ECDSA_MAYBE_DET(psa_hash); |
| ((void) f_rng); |
| ((void) p_rng); |
| |
| if (curve == 0) { |
| return MBEDTLS_ERR_PK_BAD_INPUT_DATA; |
| } |
| |
| if (key_len > sizeof(buf)) { |
| return MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; |
| } |
| ret = mbedtls_mpi_write_binary(&ctx->d, buf, key_len); |
| if (ret != 0) { |
| goto cleanup; |
| } |
| |
| psa_set_key_type(&attributes, PSA_KEY_TYPE_ECC_KEY_PAIR(curve)); |
| psa_set_key_usage_flags(&attributes, PSA_KEY_USAGE_SIGN_HASH); |
| psa_set_key_algorithm(&attributes, psa_sig_md); |
| |
| status = psa_import_key(&attributes, buf, key_len, &key_id); |
| if (status != PSA_SUCCESS) { |
| ret = PSA_PK_TO_MBEDTLS_ERR(status); |
| goto cleanup; |
| } |
| |
| ret = ecdsa_sign_psa(key_id, md_alg, hash, hash_len, sig, sig_size, sig_len); |
| |
| cleanup: |
| mbedtls_platform_zeroize(buf, sizeof(buf)); |
| status = psa_destroy_key(key_id); |
| if (ret == 0 && status != PSA_SUCCESS) { |
| ret = PSA_PK_TO_MBEDTLS_ERR(status); |
| } |
| |
| return ret; |
| } |
| #endif /* MBEDTLS_PK_USE_PSA_EC_DATA */ |
| #else /* MBEDTLS_USE_PSA_CRYPTO */ |
| static int ecdsa_sign_wrap(mbedtls_pk_context *pk, mbedtls_md_type_t md_alg, |
| const unsigned char *hash, size_t hash_len, |
| unsigned char *sig, size_t sig_size, size_t *sig_len, |
| int (*f_rng)(void *, unsigned char *, size_t), void *p_rng) |
| { |
| return mbedtls_ecdsa_write_signature((mbedtls_ecdsa_context *) pk->pk_ctx, |
| md_alg, hash, hash_len, |
| sig, sig_size, sig_len, |
| f_rng, p_rng); |
| } |
| #endif /* MBEDTLS_USE_PSA_CRYPTO */ |
| #endif /* MBEDTLS_PK_CAN_ECDSA_SIGN */ |
| |
| #if defined(MBEDTLS_ECDSA_C) && defined(MBEDTLS_ECP_RESTARTABLE) |
| /* Forward declarations */ |
| static int ecdsa_verify_rs_wrap(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, |
| void *rs_ctx); |
| |
| static int ecdsa_sign_rs_wrap(mbedtls_pk_context *ctx, mbedtls_md_type_t md_alg, |
| const unsigned char *hash, size_t hash_len, |
| unsigned char *sig, size_t sig_size, size_t *sig_len, |
| int (*f_rng)(void *, unsigned char *, size_t), void *p_rng, |
| void *rs_ctx); |
| |
| /* |
| * Restart context for ECDSA operations with ECKEY context |
| * |
| * We need to store an actual ECDSA context, as we need to pass the same to |
| * the underlying ecdsa function, so we can't create it on the fly every time. |
| */ |
| typedef struct { |
| mbedtls_ecdsa_restart_ctx ecdsa_rs; |
| mbedtls_ecdsa_context ecdsa_ctx; |
| } eckey_restart_ctx; |
| |
| static void *eckey_rs_alloc(void) |
| { |
| eckey_restart_ctx *rs_ctx; |
| |
| void *ctx = mbedtls_calloc(1, sizeof(eckey_restart_ctx)); |
| |
| if (ctx != NULL) { |
| rs_ctx = ctx; |
| mbedtls_ecdsa_restart_init(&rs_ctx->ecdsa_rs); |
| mbedtls_ecdsa_init(&rs_ctx->ecdsa_ctx); |
| } |
| |
| return ctx; |
| } |
| |
| static void eckey_rs_free(void *ctx) |
| { |
| eckey_restart_ctx *rs_ctx; |
| |
| if (ctx == NULL) { |
| return; |
| } |
| |
| rs_ctx = ctx; |
| mbedtls_ecdsa_restart_free(&rs_ctx->ecdsa_rs); |
| mbedtls_ecdsa_free(&rs_ctx->ecdsa_ctx); |
| |
| mbedtls_free(ctx); |
| } |
| |
| static int eckey_verify_rs_wrap(mbedtls_pk_context *pk, mbedtls_md_type_t md_alg, |
| const unsigned char *hash, size_t hash_len, |
| const unsigned char *sig, size_t sig_len, |
| void *rs_ctx) |
| { |
| int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; |
| eckey_restart_ctx *rs = rs_ctx; |
| |
| /* Should never happen */ |
| if (rs == NULL) { |
| return MBEDTLS_ERR_PK_BAD_INPUT_DATA; |
| } |
| |
| /* set up our own sub-context if needed (that is, on first run) */ |
| if (rs->ecdsa_ctx.grp.pbits == 0) { |
| MBEDTLS_MPI_CHK(mbedtls_ecdsa_from_keypair(&rs->ecdsa_ctx, pk->pk_ctx)); |
| } |
| |
| MBEDTLS_MPI_CHK(ecdsa_verify_rs_wrap(pk, |
| md_alg, hash, hash_len, |
| sig, sig_len, &rs->ecdsa_rs)); |
| |
| cleanup: |
| return ret; |
| } |
| |
| static int eckey_sign_rs_wrap(mbedtls_pk_context *pk, mbedtls_md_type_t md_alg, |
| const unsigned char *hash, size_t hash_len, |
| unsigned char *sig, size_t sig_size, size_t *sig_len, |
| int (*f_rng)(void *, unsigned char *, size_t), void *p_rng, |
| void *rs_ctx) |
| { |
| int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; |
| eckey_restart_ctx *rs = rs_ctx; |
| |
| /* Should never happen */ |
| if (rs == NULL) { |
| return MBEDTLS_ERR_PK_BAD_INPUT_DATA; |
| } |
| |
| /* set up our own sub-context if needed (that is, on first run) */ |
| if (rs->ecdsa_ctx.grp.pbits == 0) { |
| MBEDTLS_MPI_CHK(mbedtls_ecdsa_from_keypair(&rs->ecdsa_ctx, pk->pk_ctx)); |
| } |
| |
| MBEDTLS_MPI_CHK(ecdsa_sign_rs_wrap(pk, md_alg, |
| hash, hash_len, sig, sig_size, sig_len, |
| f_rng, p_rng, &rs->ecdsa_rs)); |
| |
| cleanup: |
| return ret; |
| } |
| #endif /* MBEDTLS_ECDSA_C && MBEDTLS_ECP_RESTARTABLE */ |
| |
| #if defined(MBEDTLS_USE_PSA_CRYPTO) |
| #if defined(MBEDTLS_PK_USE_PSA_EC_DATA) |
| static int eckey_check_pair_psa(mbedtls_pk_context *pub, mbedtls_pk_context *prv) |
| { |
| psa_status_t status; |
| int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; |
| uint8_t prv_key_buf[MBEDTLS_PSA_MAX_EC_PUBKEY_LENGTH]; |
| size_t prv_key_len; |
| mbedtls_svc_key_id_t key_id = prv->priv_id; |
| |
| status = psa_export_public_key(key_id, prv_key_buf, sizeof(prv_key_buf), |
| &prv_key_len); |
| ret = PSA_PK_TO_MBEDTLS_ERR(status); |
| if (ret != 0) { |
| return ret; |
| } |
| |
| if (memcmp(prv_key_buf, pub->pub_raw, pub->pub_raw_len) != 0) { |
| return MBEDTLS_ERR_PK_BAD_INPUT_DATA; |
| } |
| |
| return 0; |
| } |
| #else /* MBEDTLS_PK_USE_PSA_EC_DATA */ |
| static int eckey_check_pair_psa(mbedtls_pk_context *pub, mbedtls_pk_context *prv) |
| { |
| psa_status_t status; |
| int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; |
| uint8_t prv_key_buf[MBEDTLS_PSA_MAX_EC_PUBKEY_LENGTH]; |
| size_t prv_key_len; |
| psa_status_t destruction_status; |
| mbedtls_svc_key_id_t key_id = MBEDTLS_SVC_KEY_ID_INIT; |
| psa_key_attributes_t key_attr = PSA_KEY_ATTRIBUTES_INIT; |
| uint8_t pub_key_buf[MBEDTLS_PSA_MAX_EC_PUBKEY_LENGTH]; |
| size_t pub_key_len; |
| size_t curve_bits; |
| const psa_ecc_family_t curve = |
| mbedtls_ecc_group_to_psa(mbedtls_pk_ec_ro(*prv)->grp.id, &curve_bits); |
| const size_t curve_bytes = PSA_BITS_TO_BYTES(curve_bits); |
| |
| if (curve == 0) { |
| return MBEDTLS_ERR_PK_BAD_INPUT_DATA; |
| } |
| |
| psa_set_key_type(&key_attr, PSA_KEY_TYPE_ECC_KEY_PAIR(curve)); |
| psa_set_key_usage_flags(&key_attr, PSA_KEY_USAGE_EXPORT); |
| |
| ret = mbedtls_mpi_write_binary(&mbedtls_pk_ec_ro(*prv)->d, |
| prv_key_buf, curve_bytes); |
| if (ret != 0) { |
| mbedtls_platform_zeroize(prv_key_buf, sizeof(prv_key_buf)); |
| return ret; |
| } |
| |
| status = psa_import_key(&key_attr, prv_key_buf, curve_bytes, &key_id); |
| mbedtls_platform_zeroize(prv_key_buf, sizeof(prv_key_buf)); |
| ret = PSA_PK_TO_MBEDTLS_ERR(status); |
| if (ret != 0) { |
| return ret; |
| } |
| |
| // From now on prv_key_buf is used to store the public key of prv. |
| status = psa_export_public_key(key_id, prv_key_buf, sizeof(prv_key_buf), |
| &prv_key_len); |
| ret = PSA_PK_TO_MBEDTLS_ERR(status); |
| destruction_status = psa_destroy_key(key_id); |
| if (ret != 0) { |
| return ret; |
| } else if (destruction_status != PSA_SUCCESS) { |
| return PSA_PK_TO_MBEDTLS_ERR(destruction_status); |
| } |
| |
| ret = mbedtls_ecp_point_write_binary(&mbedtls_pk_ec_rw(*pub)->grp, |
| &mbedtls_pk_ec_rw(*pub)->Q, |
| MBEDTLS_ECP_PF_UNCOMPRESSED, |
| &pub_key_len, pub_key_buf, |
| sizeof(pub_key_buf)); |
| if (ret != 0) { |
| return ret; |
| } |
| |
| if (memcmp(prv_key_buf, pub_key_buf, curve_bytes) != 0) { |
| return MBEDTLS_ERR_PK_BAD_INPUT_DATA; |
| } |
| |
| return 0; |
| } |
| #endif /* MBEDTLS_PK_USE_PSA_EC_DATA */ |
| |
| static int eckey_check_pair_wrap(mbedtls_pk_context *pub, mbedtls_pk_context *prv, |
| int (*f_rng)(void *, unsigned char *, size_t), |
| void *p_rng) |
| { |
| (void) f_rng; |
| (void) p_rng; |
| return eckey_check_pair_psa(pub, prv); |
| } |
| #else /* MBEDTLS_USE_PSA_CRYPTO */ |
| static int eckey_check_pair_wrap(mbedtls_pk_context *pub, mbedtls_pk_context *prv, |
| int (*f_rng)(void *, unsigned char *, size_t), |
| void *p_rng) |
| { |
| return mbedtls_ecp_check_pub_priv((const mbedtls_ecp_keypair *) pub->pk_ctx, |
| (const mbedtls_ecp_keypair *) prv->pk_ctx, |
| f_rng, p_rng); |
| } |
| #endif /* MBEDTLS_USE_PSA_CRYPTO */ |
| |
| #if defined(MBEDTLS_USE_PSA_CRYPTO) |
| #if defined(MBEDTLS_PK_USE_PSA_EC_DATA) |
| /* When PK_USE_PSA_EC_DATA is defined opaque and non-opaque keys end up |
| * using the same function. */ |
| #define ecdsa_opaque_check_pair_wrap eckey_check_pair_wrap |
| #else /* MBEDTLS_PK_USE_PSA_EC_DATA */ |
| static int ecdsa_opaque_check_pair_wrap(mbedtls_pk_context *pub, |
| mbedtls_pk_context *prv, |
| int (*f_rng)(void *, unsigned char *, size_t), |
| void *p_rng) |
| { |
| psa_status_t status; |
| uint8_t exp_pub_key[MBEDTLS_PK_MAX_EC_PUBKEY_RAW_LEN]; |
| size_t exp_pub_key_len = 0; |
| uint8_t pub_key[MBEDTLS_PK_MAX_EC_PUBKEY_RAW_LEN]; |
| size_t pub_key_len = 0; |
| int ret; |
| (void) f_rng; |
| (void) p_rng; |
| |
| status = psa_export_public_key(prv->priv_id, exp_pub_key, sizeof(exp_pub_key), |
| &exp_pub_key_len); |
| if (status != PSA_SUCCESS) { |
| ret = psa_pk_status_to_mbedtls(status); |
| return ret; |
| } |
| ret = mbedtls_ecp_point_write_binary(&(mbedtls_pk_ec_ro(*pub)->grp), |
| &(mbedtls_pk_ec_ro(*pub)->Q), |
| MBEDTLS_ECP_PF_UNCOMPRESSED, |
| &pub_key_len, pub_key, sizeof(pub_key)); |
| if (ret != 0) { |
| return ret; |
| } |
| if ((exp_pub_key_len != pub_key_len) || |
| memcmp(exp_pub_key, pub_key, exp_pub_key_len)) { |
| return MBEDTLS_ERR_PK_BAD_INPUT_DATA; |
| } |
| return 0; |
| } |
| #endif /* MBEDTLS_PK_USE_PSA_EC_DATA */ |
| #endif /* MBEDTLS_USE_PSA_CRYPTO */ |
| |
| #if !defined(MBEDTLS_PK_USE_PSA_EC_DATA) |
| static void *eckey_alloc_wrap(void) |
| { |
| void *ctx = mbedtls_calloc(1, sizeof(mbedtls_ecp_keypair)); |
| |
| if (ctx != NULL) { |
| mbedtls_ecp_keypair_init(ctx); |
| } |
| |
| return ctx; |
| } |
| |
| static void eckey_free_wrap(void *ctx) |
| { |
| mbedtls_ecp_keypair_free((mbedtls_ecp_keypair *) ctx); |
| mbedtls_free(ctx); |
| } |
| #endif /* MBEDTLS_PK_USE_PSA_EC_DATA */ |
| |
| static void eckey_debug(mbedtls_pk_context *pk, mbedtls_pk_debug_item *items) |
| { |
| #if defined(MBEDTLS_PK_USE_PSA_EC_DATA) |
| items->type = MBEDTLS_PK_DEBUG_PSA_EC; |
| items->name = "eckey.Q"; |
| items->value = pk; |
| #else /* MBEDTLS_PK_USE_PSA_EC_DATA */ |
| mbedtls_ecp_keypair *ecp = (mbedtls_ecp_keypair *) pk->pk_ctx; |
| items->type = MBEDTLS_PK_DEBUG_ECP; |
| items->name = "eckey.Q"; |
| items->value = &(ecp->Q); |
| #endif /* MBEDTLS_PK_USE_PSA_EC_DATA */ |
| } |
| |
| const mbedtls_pk_info_t mbedtls_eckey_info = { |
| .type = MBEDTLS_PK_ECKEY, |
| .name = "EC", |
| .get_bitlen = eckey_get_bitlen, |
| .can_do = eckey_can_do, |
| #if defined(MBEDTLS_PK_CAN_ECDSA_VERIFY) |
| .verify_func = ecdsa_verify_wrap, /* Compatible key structures */ |
| #else /* MBEDTLS_PK_CAN_ECDSA_VERIFY */ |
| .verify_func = NULL, |
| #endif /* MBEDTLS_PK_CAN_ECDSA_VERIFY */ |
| #if defined(MBEDTLS_PK_CAN_ECDSA_SIGN) |
| .sign_func = ecdsa_sign_wrap, /* Compatible key structures */ |
| #else /* MBEDTLS_PK_CAN_ECDSA_VERIFY */ |
| .sign_func = NULL, |
| #endif /* MBEDTLS_PK_CAN_ECDSA_VERIFY */ |
| #if defined(MBEDTLS_ECDSA_C) && defined(MBEDTLS_ECP_RESTARTABLE) |
| .verify_rs_func = eckey_verify_rs_wrap, |
| .sign_rs_func = eckey_sign_rs_wrap, |
| .rs_alloc_func = eckey_rs_alloc, |
| .rs_free_func = eckey_rs_free, |
| #endif /* MBEDTLS_ECDSA_C && MBEDTLS_ECP_RESTARTABLE */ |
| .decrypt_func = NULL, |
| .encrypt_func = NULL, |
| .check_pair_func = eckey_check_pair_wrap, |
| #if defined(MBEDTLS_PK_USE_PSA_EC_DATA) |
| .ctx_alloc_func = NULL, |
| .ctx_free_func = NULL, |
| #else /* MBEDTLS_PK_USE_PSA_EC_DATA */ |
| .ctx_alloc_func = eckey_alloc_wrap, |
| .ctx_free_func = eckey_free_wrap, |
| #endif /* MBEDTLS_PK_USE_PSA_EC_DATA */ |
| .debug_func = eckey_debug, |
| }; |
| |
| /* |
| * EC key restricted to ECDH |
| */ |
| static int eckeydh_can_do(mbedtls_pk_type_t type) |
| { |
| return type == MBEDTLS_PK_ECKEY || |
| type == MBEDTLS_PK_ECKEY_DH; |
| } |
| |
| const mbedtls_pk_info_t mbedtls_eckeydh_info = { |
| .type = MBEDTLS_PK_ECKEY_DH, |
| .name = "EC_DH", |
| .get_bitlen = eckey_get_bitlen, /* Same underlying key structure */ |
| .can_do = eckeydh_can_do, |
| .verify_func = NULL, |
| .sign_func = NULL, |
| #if defined(MBEDTLS_ECDSA_C) && defined(MBEDTLS_ECP_RESTARTABLE) |
| .verify_rs_func = NULL, |
| .sign_rs_func = NULL, |
| #endif /* MBEDTLS_ECDSA_C && MBEDTLS_ECP_RESTARTABLE */ |
| .decrypt_func = NULL, |
| .encrypt_func = NULL, |
| .check_pair_func = eckey_check_pair_wrap, |
| #if defined(MBEDTLS_PK_USE_PSA_EC_DATA) |
| .ctx_alloc_func = NULL, |
| .ctx_free_func = NULL, |
| #else /* MBEDTLS_PK_USE_PSA_EC_DATA */ |
| .ctx_alloc_func = eckey_alloc_wrap, /* Same underlying key structure */ |
| .ctx_free_func = eckey_free_wrap, /* Same underlying key structure */ |
| #endif /* MBEDTLS_PK_USE_PSA_EC_DATA */ |
| .debug_func = eckey_debug, /* Same underlying key structure */ |
| }; |
| |
| #if defined(MBEDTLS_PK_CAN_ECDSA_SOME) |
| static int ecdsa_can_do(mbedtls_pk_type_t type) |
| { |
| return type == MBEDTLS_PK_ECDSA; |
| } |
| |
| #if defined(MBEDTLS_ECDSA_C) && defined(MBEDTLS_ECP_RESTARTABLE) |
| static int ecdsa_verify_rs_wrap(mbedtls_pk_context *pk, mbedtls_md_type_t md_alg, |
| const unsigned char *hash, size_t hash_len, |
| const unsigned char *sig, size_t sig_len, |
| void *rs_ctx) |
| { |
| int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; |
| ((void) md_alg); |
| |
| ret = mbedtls_ecdsa_read_signature_restartable( |
| (mbedtls_ecdsa_context *) pk->pk_ctx, |
| hash, hash_len, sig, sig_len, |
| (mbedtls_ecdsa_restart_ctx *) rs_ctx); |
| |
| if (ret == MBEDTLS_ERR_ECP_SIG_LEN_MISMATCH) { |
| return MBEDTLS_ERR_PK_SIG_LEN_MISMATCH; |
| } |
| |
| return ret; |
| } |
| |
| static int ecdsa_sign_rs_wrap(mbedtls_pk_context *pk, mbedtls_md_type_t md_alg, |
| const unsigned char *hash, size_t hash_len, |
| unsigned char *sig, size_t sig_size, size_t *sig_len, |
| int (*f_rng)(void *, unsigned char *, size_t), void *p_rng, |
| void *rs_ctx) |
| { |
| return mbedtls_ecdsa_write_signature_restartable( |
| (mbedtls_ecdsa_context *) pk->pk_ctx, |
| md_alg, hash, hash_len, sig, sig_size, sig_len, f_rng, p_rng, |
| (mbedtls_ecdsa_restart_ctx *) rs_ctx); |
| |
| } |
| |
| static void *ecdsa_rs_alloc(void) |
| { |
| void *ctx = mbedtls_calloc(1, sizeof(mbedtls_ecdsa_restart_ctx)); |
| |
| if (ctx != NULL) { |
| mbedtls_ecdsa_restart_init(ctx); |
| } |
| |
| return ctx; |
| } |
| |
| static void ecdsa_rs_free(void *ctx) |
| { |
| mbedtls_ecdsa_restart_free(ctx); |
| mbedtls_free(ctx); |
| } |
| #endif /* MBEDTLS_ECDSA_C && MBEDTLS_ECP_RESTARTABLE */ |
| |
| const mbedtls_pk_info_t mbedtls_ecdsa_info = { |
| .type = MBEDTLS_PK_ECDSA, |
| .name = "ECDSA", |
| .get_bitlen = eckey_get_bitlen, /* Compatible key structures */ |
| .can_do = ecdsa_can_do, |
| #if defined(MBEDTLS_PK_CAN_ECDSA_VERIFY) |
| .verify_func = ecdsa_verify_wrap, /* Compatible key structures */ |
| #else /* MBEDTLS_PK_CAN_ECDSA_VERIFY */ |
| .verify_func = NULL, |
| #endif /* MBEDTLS_PK_CAN_ECDSA_VERIFY */ |
| #if defined(MBEDTLS_PK_CAN_ECDSA_SIGN) |
| .sign_func = ecdsa_sign_wrap, /* Compatible key structures */ |
| #else /* MBEDTLS_PK_CAN_ECDSA_SIGN */ |
| .sign_func = NULL, |
| #endif /* MBEDTLS_PK_CAN_ECDSA_SIGN */ |
| #if defined(MBEDTLS_ECDSA_C) && defined(MBEDTLS_ECP_RESTARTABLE) |
| .verify_rs_func = ecdsa_verify_rs_wrap, |
| .sign_rs_func = ecdsa_sign_rs_wrap, |
| .rs_alloc_func = ecdsa_rs_alloc, |
| .rs_free_func = ecdsa_rs_free, |
| #endif /* MBEDTLS_ECDSA_C && MBEDTLS_ECP_RESTARTABLE */ |
| .decrypt_func = NULL, |
| .encrypt_func = NULL, |
| .check_pair_func = eckey_check_pair_wrap, /* Compatible key structures */ |
| #if defined(MBEDTLS_PK_USE_PSA_EC_DATA) |
| .ctx_alloc_func = NULL, |
| .ctx_free_func = NULL, |
| #else /* MBEDTLS_PK_USE_PSA_EC_DATA */ |
| .ctx_alloc_func = eckey_alloc_wrap, /* Compatible key structures */ |
| .ctx_free_func = eckey_free_wrap, /* Compatible key structures */ |
| #endif /* MBEDTLS_PK_USE_PSA_EC_DATA */ |
| .debug_func = eckey_debug, /* Compatible key structures */ |
| }; |
| #endif /* MBEDTLS_PK_CAN_ECDSA_SOME */ |
| #endif /* MBEDTLS_PK_HAVE_ECC_KEYS */ |
| |
| #if defined(MBEDTLS_PK_RSA_ALT_SUPPORT) |
| /* |
| * Support for alternative RSA-private implementations |
| */ |
| |
| static int rsa_alt_can_do(mbedtls_pk_type_t type) |
| { |
| return type == MBEDTLS_PK_RSA; |
| } |
| |
| static size_t rsa_alt_get_bitlen(mbedtls_pk_context *pk) |
| { |
| const mbedtls_rsa_alt_context *rsa_alt = pk->pk_ctx; |
| |
| return 8 * rsa_alt->key_len_func(rsa_alt->key); |
| } |
| |
| static int rsa_alt_sign_wrap(mbedtls_pk_context *pk, mbedtls_md_type_t md_alg, |
| const unsigned char *hash, size_t hash_len, |
| unsigned char *sig, size_t sig_size, size_t *sig_len, |
| int (*f_rng)(void *, unsigned char *, size_t), void *p_rng) |
| { |
| mbedtls_rsa_alt_context *rsa_alt = pk->pk_ctx; |
| |
| #if SIZE_MAX > UINT_MAX |
| if (UINT_MAX < hash_len) { |
| return MBEDTLS_ERR_PK_BAD_INPUT_DATA; |
| } |
| #endif |
| |
| *sig_len = rsa_alt->key_len_func(rsa_alt->key); |
| if (*sig_len > MBEDTLS_PK_SIGNATURE_MAX_SIZE) { |
| return MBEDTLS_ERR_PK_BAD_INPUT_DATA; |
| } |
| if (*sig_len > sig_size) { |
| return MBEDTLS_ERR_PK_BUFFER_TOO_SMALL; |
| } |
| |
| return rsa_alt->sign_func(rsa_alt->key, f_rng, p_rng, |
| md_alg, (unsigned int) hash_len, hash, sig); |
| } |
| |
| static int rsa_alt_decrypt_wrap(mbedtls_pk_context *pk, |
| 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) |
| { |
| mbedtls_rsa_alt_context *rsa_alt = pk->pk_ctx; |
| |
| ((void) f_rng); |
| ((void) p_rng); |
| |
| if (ilen != rsa_alt->key_len_func(rsa_alt->key)) { |
| return MBEDTLS_ERR_RSA_BAD_INPUT_DATA; |
| } |
| |
| return rsa_alt->decrypt_func(rsa_alt->key, |
| olen, input, output, osize); |
| } |
| |
| #if defined(MBEDTLS_RSA_C) |
| static int rsa_alt_check_pair(mbedtls_pk_context *pub, mbedtls_pk_context *prv, |
| int (*f_rng)(void *, unsigned char *, size_t), |
| void *p_rng) |
| { |
| unsigned char sig[MBEDTLS_MPI_MAX_SIZE]; |
| unsigned char hash[32]; |
| size_t sig_len = 0; |
| int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; |
| |
| if (rsa_alt_get_bitlen(prv) != rsa_get_bitlen(pub)) { |
| return MBEDTLS_ERR_RSA_KEY_CHECK_FAILED; |
| } |
| |
| memset(hash, 0x2a, sizeof(hash)); |
| |
| if ((ret = rsa_alt_sign_wrap(prv, MBEDTLS_MD_NONE, |
| hash, sizeof(hash), |
| sig, sizeof(sig), &sig_len, |
| f_rng, p_rng)) != 0) { |
| return ret; |
| } |
| |
| if (rsa_verify_wrap(pub, MBEDTLS_MD_NONE, |
| hash, sizeof(hash), sig, sig_len) != 0) { |
| return MBEDTLS_ERR_RSA_KEY_CHECK_FAILED; |
| } |
| |
| return 0; |
| } |
| #endif /* MBEDTLS_RSA_C */ |
| |
| static void *rsa_alt_alloc_wrap(void) |
| { |
| void *ctx = mbedtls_calloc(1, sizeof(mbedtls_rsa_alt_context)); |
| |
| if (ctx != NULL) { |
| memset(ctx, 0, sizeof(mbedtls_rsa_alt_context)); |
| } |
| |
| return ctx; |
| } |
| |
| static void rsa_alt_free_wrap(void *ctx) |
| { |
| mbedtls_zeroize_and_free(ctx, sizeof(mbedtls_rsa_alt_context)); |
| } |
| |
| const mbedtls_pk_info_t mbedtls_rsa_alt_info = { |
| .type = MBEDTLS_PK_RSA_ALT, |
| .name = "RSA-alt", |
| .get_bitlen = rsa_alt_get_bitlen, |
| .can_do = rsa_alt_can_do, |
| .verify_func = NULL, |
| .sign_func = rsa_alt_sign_wrap, |
| #if defined(MBEDTLS_ECDSA_C) && defined(MBEDTLS_ECP_RESTARTABLE) |
| .verify_rs_func = NULL, |
| .sign_rs_func = NULL, |
| .rs_alloc_func = NULL, |
| .rs_free_func = NULL, |
| #endif /* MBEDTLS_ECDSA_C && MBEDTLS_ECP_RESTARTABLE */ |
| .decrypt_func = rsa_alt_decrypt_wrap, |
| .encrypt_func = NULL, |
| #if defined(MBEDTLS_RSA_C) |
| .check_pair_func = rsa_alt_check_pair, |
| #else |
| .check_pair_func = NULL, |
| #endif |
| .ctx_alloc_func = rsa_alt_alloc_wrap, |
| .ctx_free_func = rsa_alt_free_wrap, |
| .debug_func = NULL, |
| }; |
| #endif /* MBEDTLS_PK_RSA_ALT_SUPPORT */ |
| |
| #if defined(MBEDTLS_USE_PSA_CRYPTO) |
| static size_t opaque_get_bitlen(mbedtls_pk_context *pk) |
| { |
| size_t bits; |
| psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT; |
| |
| if (PSA_SUCCESS != psa_get_key_attributes(pk->priv_id, &attributes)) { |
| return 0; |
| } |
| |
| bits = psa_get_key_bits(&attributes); |
| psa_reset_key_attributes(&attributes); |
| return bits; |
| } |
| |
| #if defined(MBEDTLS_PK_HAVE_ECC_KEYS) |
| static int ecdsa_opaque_can_do(mbedtls_pk_type_t type) |
| { |
| return type == MBEDTLS_PK_ECKEY || |
| type == MBEDTLS_PK_ECDSA; |
| } |
| |
| const mbedtls_pk_info_t mbedtls_ecdsa_opaque_info = { |
| .type = MBEDTLS_PK_OPAQUE, |
| .name = "Opaque", |
| .get_bitlen = opaque_get_bitlen, |
| .can_do = ecdsa_opaque_can_do, |
| #if defined(MBEDTLS_PK_CAN_ECDSA_VERIFY) |
| .verify_func = ecdsa_opaque_verify_wrap, |
| #else /* MBEDTLS_PK_CAN_ECDSA_VERIFY */ |
| .verify_func = NULL, |
| #endif /* MBEDTLS_PK_CAN_ECDSA_VERIFY */ |
| #if defined(MBEDTLS_PK_CAN_ECDSA_SIGN) |
| .sign_func = ecdsa_opaque_sign_wrap, |
| #else /* MBEDTLS_PK_CAN_ECDSA_SIGN */ |
| .sign_func = NULL, |
| #endif /* MBEDTLS_PK_CAN_ECDSA_SIGN */ |
| #if defined(MBEDTLS_ECDSA_C) && defined(MBEDTLS_ECP_RESTARTABLE) |
| .verify_rs_func = NULL, |
| .sign_rs_func = NULL, |
| .rs_alloc_func = NULL, |
| .rs_free_func = NULL, |
| #endif /* MBEDTLS_ECDSA_C && MBEDTLS_ECP_RESTARTABLE */ |
| .decrypt_func = NULL, |
| .encrypt_func = NULL, |
| .check_pair_func = ecdsa_opaque_check_pair_wrap, |
| .ctx_alloc_func = NULL, |
| .ctx_free_func = NULL, |
| .debug_func = NULL, |
| }; |
| #endif /* MBEDTLS_PK_HAVE_ECC_KEYS */ |
| |
| static int rsa_opaque_can_do(mbedtls_pk_type_t type) |
| { |
| return type == MBEDTLS_PK_RSA || |
| type == MBEDTLS_PK_RSASSA_PSS; |
| } |
| |
| #if defined(PSA_WANT_KEY_TYPE_RSA_KEY_PAIR_BASIC) |
| static int rsa_opaque_decrypt(mbedtls_pk_context *pk, |
| 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) |
| { |
| psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT; |
| psa_algorithm_t alg; |
| psa_key_type_t type; |
| psa_status_t status; |
| |
| /* PSA has its own RNG */ |
| (void) f_rng; |
| (void) p_rng; |
| |
| status = psa_get_key_attributes(pk->priv_id, &attributes); |
| if (status != PSA_SUCCESS) { |
| return PSA_PK_TO_MBEDTLS_ERR(status); |
| } |
| |
| type = psa_get_key_type(&attributes); |
| alg = psa_get_key_algorithm(&attributes); |
| psa_reset_key_attributes(&attributes); |
| |
| if (!PSA_KEY_TYPE_IS_RSA(type)) { |
| return MBEDTLS_ERR_PK_FEATURE_UNAVAILABLE; |
| } |
| |
| status = psa_asymmetric_decrypt(pk->priv_id, alg, input, ilen, NULL, 0, output, osize, olen); |
| if (status != PSA_SUCCESS) { |
| return PSA_PK_RSA_TO_MBEDTLS_ERR(status); |
| } |
| |
| return 0; |
| } |
| #endif /* PSA_WANT_KEY_TYPE_RSA_KEY_PAIR_BASIC */ |
| |
| static int rsa_opaque_sign_wrap(mbedtls_pk_context *pk, mbedtls_md_type_t md_alg, |
| const unsigned char *hash, size_t hash_len, |
| unsigned char *sig, size_t sig_size, size_t *sig_len, |
| int (*f_rng)(void *, unsigned char *, size_t), void *p_rng) |
| { |
| #if defined(MBEDTLS_RSA_C) |
| psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT; |
| psa_algorithm_t alg; |
| psa_key_type_t type; |
| psa_status_t status; |
| |
| /* PSA has its own RNG */ |
| (void) f_rng; |
| (void) p_rng; |
| |
| status = psa_get_key_attributes(pk->priv_id, &attributes); |
| if (status != PSA_SUCCESS) { |
| return PSA_PK_TO_MBEDTLS_ERR(status); |
| } |
| |
| type = psa_get_key_type(&attributes); |
| alg = psa_get_key_algorithm(&attributes); |
| psa_reset_key_attributes(&attributes); |
| |
| if (PSA_KEY_TYPE_IS_RSA(type)) { |
| alg = (alg & ~PSA_ALG_HASH_MASK) | mbedtls_md_psa_alg_from_type(md_alg); |
| } else { |
| return MBEDTLS_ERR_PK_FEATURE_UNAVAILABLE; |
| } |
| |
| status = psa_sign_hash(pk->priv_id, alg, hash, hash_len, sig, sig_size, sig_len); |
| if (status != PSA_SUCCESS) { |
| if (PSA_KEY_TYPE_IS_RSA(type)) { |
| return PSA_PK_RSA_TO_MBEDTLS_ERR(status); |
| } else { |
| return PSA_PK_TO_MBEDTLS_ERR(status); |
| } |
| } |
| |
| return 0; |
| #else /* !MBEDTLS_RSA_C */ |
| ((void) pk); |
| ((void) md_alg); |
| ((void) hash); |
| ((void) hash_len); |
| ((void) sig); |
| ((void) sig_size); |
| ((void) sig_len); |
| ((void) f_rng); |
| ((void) p_rng); |
| return MBEDTLS_ERR_PK_FEATURE_UNAVAILABLE; |
| #endif /* !MBEDTLS_RSA_C */ |
| } |
| |
| const mbedtls_pk_info_t mbedtls_rsa_opaque_info = { |
| .type = MBEDTLS_PK_OPAQUE, |
| .name = "Opaque", |
| .get_bitlen = opaque_get_bitlen, |
| .can_do = rsa_opaque_can_do, |
| .verify_func = NULL, |
| .sign_func = rsa_opaque_sign_wrap, |
| #if defined(MBEDTLS_ECDSA_C) && defined(MBEDTLS_ECP_RESTARTABLE) |
| .verify_rs_func = NULL, |
| .sign_rs_func = NULL, |
| .rs_alloc_func = NULL, |
| .rs_free_func = NULL, |
| #endif /* MBEDTLS_ECDSA_C && MBEDTLS_ECP_RESTARTABLE */ |
| #if defined(PSA_WANT_KEY_TYPE_RSA_KEY_PAIR_BASIC) |
| .decrypt_func = rsa_opaque_decrypt, |
| #else /* PSA_WANT_KEY_TYPE_RSA_KEY_PAIR_BASIC */ |
| .decrypt_func = NULL, |
| #endif /* PSA_WANT_KEY_TYPE_RSA_KEY_PAIR_BASIC */ |
| .encrypt_func = NULL, |
| .check_pair_func = NULL, |
| .ctx_alloc_func = NULL, |
| .ctx_free_func = NULL, |
| .debug_func = NULL, |
| }; |
| |
| #endif /* MBEDTLS_USE_PSA_CRYPTO */ |
| |
| #endif /* MBEDTLS_PK_C */ |
