e00954d0ed
Signed-off-by: Valerio Setti <valerio.setti@nordicsemi.no>
960 lines
29 KiB
C
960 lines
29 KiB
C
/*
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* Public Key abstraction layer
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*
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* Copyright The Mbed TLS Contributors
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed under the Apache License, Version 2.0 (the "License"); you may
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* not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "common.h"
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#if defined(MBEDTLS_PK_C)
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#include "mbedtls/pk.h"
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#include "pk_wrap.h"
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#include "pkwrite.h"
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#include "hash_info.h"
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#include "mbedtls/platform_util.h"
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#include "mbedtls/error.h"
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#if defined(MBEDTLS_RSA_C)
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#include "mbedtls/rsa.h"
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#endif
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#if defined(MBEDTLS_ECP_LIGHT)
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#include "mbedtls/ecp.h"
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#endif
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#if defined(MBEDTLS_ECDSA_C)
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#include "mbedtls/ecdsa.h"
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#endif
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#if defined(MBEDTLS_PSA_CRYPTO_C)
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#include "mbedtls/psa_util.h"
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#define PSA_PK_TO_MBEDTLS_ERR(status) psa_pk_status_to_mbedtls(status)
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#define PSA_PK_RSA_TO_MBEDTLS_ERR(status) PSA_TO_MBEDTLS_ERR_LIST(status, \
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psa_to_pk_rsa_errors, \
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psa_pk_status_to_mbedtls)
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#define PSA_PK_ECDSA_TO_MBEDTLS_ERR(status) PSA_TO_MBEDTLS_ERR_LIST(status, \
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psa_to_pk_ecdsa_errors, \
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psa_pk_status_to_mbedtls)
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#endif
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#include <limits.h>
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#include <stdint.h>
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/*
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* Initialise a mbedtls_pk_context
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*/
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void mbedtls_pk_init(mbedtls_pk_context *ctx)
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{
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ctx->pk_info = NULL;
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ctx->pk_ctx = NULL;
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#if defined(MBEDTLS_PSA_CRYPTO_C)
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ctx->opaque_id = MBEDTLS_SVC_KEY_ID_INIT;
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#endif /* MBEDTLS_PSA_CRYPTO_C */
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}
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/*
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* Free (the components of) a mbedtls_pk_context
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*/
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void mbedtls_pk_free(mbedtls_pk_context *ctx)
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{
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if (ctx == NULL) {
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return;
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}
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if ((ctx->pk_info != NULL) && (ctx->pk_info->ctx_free_func != NULL)) {
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ctx->pk_info->ctx_free_func(ctx->pk_ctx);
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}
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mbedtls_platform_zeroize(ctx, sizeof(mbedtls_pk_context));
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}
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#if defined(MBEDTLS_ECDSA_C) && defined(MBEDTLS_ECP_RESTARTABLE)
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/*
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* Initialize a restart context
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*/
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void mbedtls_pk_restart_init(mbedtls_pk_restart_ctx *ctx)
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{
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ctx->pk_info = NULL;
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ctx->rs_ctx = NULL;
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}
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/*
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* Free the components of a restart context
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*/
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void mbedtls_pk_restart_free(mbedtls_pk_restart_ctx *ctx)
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{
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if (ctx == NULL || ctx->pk_info == NULL ||
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ctx->pk_info->rs_free_func == NULL) {
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return;
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}
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ctx->pk_info->rs_free_func(ctx->rs_ctx);
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ctx->pk_info = NULL;
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ctx->rs_ctx = NULL;
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}
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#endif /* MBEDTLS_ECDSA_C && MBEDTLS_ECP_RESTARTABLE */
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/*
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* Get pk_info structure from type
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*/
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const mbedtls_pk_info_t *mbedtls_pk_info_from_type(mbedtls_pk_type_t pk_type)
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{
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switch (pk_type) {
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#if defined(MBEDTLS_RSA_C)
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case MBEDTLS_PK_RSA:
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return &mbedtls_rsa_info;
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#endif /* MBEDTLS_RSA_C */
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#if defined(MBEDTLS_ECP_LIGHT)
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case MBEDTLS_PK_ECKEY:
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return &mbedtls_eckey_info;
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case MBEDTLS_PK_ECKEY_DH:
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return &mbedtls_eckeydh_info;
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#endif /* MBEDTLS_ECP_LIGHT */
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#if defined(MBEDTLS_PK_CAN_ECDSA_SOME)
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case MBEDTLS_PK_ECDSA:
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return &mbedtls_ecdsa_info;
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#endif /* MBEDTLS_PK_CAN_ECDSA_SOME */
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/* MBEDTLS_PK_RSA_ALT omitted on purpose */
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default:
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return NULL;
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}
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}
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/*
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* Initialise context
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*/
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int mbedtls_pk_setup(mbedtls_pk_context *ctx, const mbedtls_pk_info_t *info)
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{
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if (info == NULL || ctx->pk_info != NULL) {
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return MBEDTLS_ERR_PK_BAD_INPUT_DATA;
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}
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if ((info->ctx_alloc_func == NULL) ||
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((ctx->pk_ctx = info->ctx_alloc_func()) == NULL)) {
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return MBEDTLS_ERR_PK_ALLOC_FAILED;
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}
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ctx->pk_info = info;
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return 0;
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}
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#if defined(MBEDTLS_USE_PSA_CRYPTO)
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/*
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* Initialise a PSA-wrapping context
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*/
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int mbedtls_pk_setup_opaque(mbedtls_pk_context *ctx,
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const mbedtls_svc_key_id_t key)
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{
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const mbedtls_pk_info_t *info = NULL;
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psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
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psa_key_type_t type;
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if (ctx == NULL || ctx->pk_info != NULL) {
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return MBEDTLS_ERR_PK_BAD_INPUT_DATA;
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}
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if (PSA_SUCCESS != psa_get_key_attributes(key, &attributes)) {
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return MBEDTLS_ERR_PK_BAD_INPUT_DATA;
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}
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type = psa_get_key_type(&attributes);
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psa_reset_key_attributes(&attributes);
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if (PSA_KEY_TYPE_IS_ECC_KEY_PAIR(type)) {
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info = &mbedtls_pk_ecdsa_opaque_info;
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} else if (type == PSA_KEY_TYPE_RSA_KEY_PAIR) {
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info = &mbedtls_pk_rsa_opaque_info;
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} else {
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return MBEDTLS_ERR_PK_FEATURE_UNAVAILABLE;
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}
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ctx->pk_info = info;
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ctx->opaque_id = key;
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return 0;
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}
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#endif /* MBEDTLS_USE_PSA_CRYPTO */
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#if defined(MBEDTLS_PK_RSA_ALT_SUPPORT)
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/*
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* Initialize an RSA-alt context
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*/
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int mbedtls_pk_setup_rsa_alt(mbedtls_pk_context *ctx, void *key,
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mbedtls_pk_rsa_alt_decrypt_func decrypt_func,
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mbedtls_pk_rsa_alt_sign_func sign_func,
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mbedtls_pk_rsa_alt_key_len_func key_len_func)
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{
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mbedtls_rsa_alt_context *rsa_alt;
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const mbedtls_pk_info_t *info = &mbedtls_rsa_alt_info;
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if (ctx->pk_info != NULL) {
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return MBEDTLS_ERR_PK_BAD_INPUT_DATA;
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}
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if ((ctx->pk_ctx = info->ctx_alloc_func()) == NULL) {
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return MBEDTLS_ERR_PK_ALLOC_FAILED;
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}
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ctx->pk_info = info;
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rsa_alt = (mbedtls_rsa_alt_context *) ctx->pk_ctx;
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rsa_alt->key = key;
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rsa_alt->decrypt_func = decrypt_func;
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rsa_alt->sign_func = sign_func;
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rsa_alt->key_len_func = key_len_func;
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return 0;
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}
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#endif /* MBEDTLS_PK_RSA_ALT_SUPPORT */
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/*
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* Tell if a PK can do the operations of the given type
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*/
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int mbedtls_pk_can_do(const mbedtls_pk_context *ctx, mbedtls_pk_type_t type)
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{
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/* A context with null pk_info is not set up yet and can't do anything.
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* For backward compatibility, also accept NULL instead of a context
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* pointer. */
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if (ctx == NULL || ctx->pk_info == NULL) {
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return 0;
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}
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return ctx->pk_info->can_do(type);
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}
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#if defined(MBEDTLS_USE_PSA_CRYPTO)
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/*
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* Tell if a PK can do the operations of the given PSA algorithm
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*/
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int mbedtls_pk_can_do_ext(const mbedtls_pk_context *ctx, psa_algorithm_t alg,
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psa_key_usage_t usage)
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{
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psa_key_usage_t key_usage;
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/* A context with null pk_info is not set up yet and can't do anything.
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* For backward compatibility, also accept NULL instead of a context
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* pointer. */
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if (ctx == NULL || ctx->pk_info == NULL) {
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return 0;
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}
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/* Filter out non allowed algorithms */
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if (PSA_ALG_IS_ECDSA(alg) == 0 &&
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PSA_ALG_IS_RSA_PKCS1V15_SIGN(alg) == 0 &&
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PSA_ALG_IS_RSA_PSS(alg) == 0 &&
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alg != PSA_ALG_RSA_PKCS1V15_CRYPT &&
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PSA_ALG_IS_ECDH(alg) == 0) {
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return 0;
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}
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/* Filter out non allowed usage flags */
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if (usage == 0 ||
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(usage & ~(PSA_KEY_USAGE_SIGN_HASH |
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PSA_KEY_USAGE_DECRYPT |
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PSA_KEY_USAGE_DERIVE)) != 0) {
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return 0;
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}
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/* Wildcard hash is not allowed */
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if (PSA_ALG_IS_SIGN_HASH(alg) &&
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PSA_ALG_SIGN_GET_HASH(alg) == PSA_ALG_ANY_HASH) {
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return 0;
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}
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if (mbedtls_pk_get_type(ctx) != MBEDTLS_PK_OPAQUE) {
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mbedtls_pk_type_t type;
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if (PSA_ALG_IS_ECDSA(alg) || PSA_ALG_IS_ECDH(alg)) {
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type = MBEDTLS_PK_ECKEY;
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} else if (PSA_ALG_IS_RSA_PKCS1V15_SIGN(alg) ||
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alg == PSA_ALG_RSA_PKCS1V15_CRYPT) {
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type = MBEDTLS_PK_RSA;
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} else if (PSA_ALG_IS_RSA_PSS(alg)) {
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type = MBEDTLS_PK_RSASSA_PSS;
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} else {
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return 0;
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}
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if (ctx->pk_info->can_do(type) == 0) {
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return 0;
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}
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switch (type) {
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case MBEDTLS_PK_ECKEY:
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key_usage = PSA_KEY_USAGE_SIGN_HASH | PSA_KEY_USAGE_DERIVE;
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break;
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case MBEDTLS_PK_RSA:
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case MBEDTLS_PK_RSASSA_PSS:
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key_usage = PSA_KEY_USAGE_SIGN_HASH |
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PSA_KEY_USAGE_SIGN_MESSAGE |
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PSA_KEY_USAGE_DECRYPT;
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break;
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default:
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/* Should never happen */
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return 0;
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}
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return (key_usage & usage) == usage;
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}
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const mbedtls_svc_key_id_t *key = (const mbedtls_svc_key_id_t *) ctx->pk_ctx;
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psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
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psa_algorithm_t key_alg, key_alg2;
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psa_status_t status;
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status = psa_get_key_attributes(*key, &attributes);
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if (status != PSA_SUCCESS) {
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return 0;
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}
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key_alg = psa_get_key_algorithm(&attributes);
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key_alg2 = psa_get_key_enrollment_algorithm(&attributes);
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key_usage = psa_get_key_usage_flags(&attributes);
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psa_reset_key_attributes(&attributes);
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if ((key_usage & usage) != usage) {
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return 0;
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}
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/*
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* Common case: the key alg or alg2 only allows alg.
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* This will match PSA_ALG_RSA_PKCS1V15_CRYPT & PSA_ALG_IS_ECDH
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* directly.
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* This would also match ECDSA/RSA_PKCS1V15_SIGN/RSA_PSS with
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* a fixed hash on key_alg/key_alg2.
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*/
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if (alg == key_alg || alg == key_alg2) {
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return 1;
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}
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/*
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* If key_alg or key_alg2 is a hash-and-sign with a wildcard for the hash,
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* and alg is the same hash-and-sign family with any hash,
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* then alg is compliant with this key alg
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*/
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if (PSA_ALG_IS_SIGN_HASH(alg)) {
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if (PSA_ALG_IS_SIGN_HASH(key_alg) &&
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PSA_ALG_SIGN_GET_HASH(key_alg) == PSA_ALG_ANY_HASH &&
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(alg & ~PSA_ALG_HASH_MASK) == (key_alg & ~PSA_ALG_HASH_MASK)) {
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return 1;
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}
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if (PSA_ALG_IS_SIGN_HASH(key_alg2) &&
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PSA_ALG_SIGN_GET_HASH(key_alg2) == PSA_ALG_ANY_HASH &&
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(alg & ~PSA_ALG_HASH_MASK) == (key_alg2 & ~PSA_ALG_HASH_MASK)) {
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return 1;
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}
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}
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return 0;
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}
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#endif /* MBEDTLS_USE_PSA_CRYPTO */
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/*
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* Helper for mbedtls_pk_sign and mbedtls_pk_verify
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*/
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static inline int pk_hashlen_helper(mbedtls_md_type_t md_alg, size_t *hash_len)
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{
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if (*hash_len != 0) {
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return 0;
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}
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*hash_len = mbedtls_hash_info_get_size(md_alg);
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if (*hash_len == 0) {
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return -1;
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}
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return 0;
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}
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#if defined(MBEDTLS_ECDSA_C) && defined(MBEDTLS_ECP_RESTARTABLE)
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/*
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* Helper to set up a restart context if needed
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*/
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static int pk_restart_setup(mbedtls_pk_restart_ctx *ctx,
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const mbedtls_pk_info_t *info)
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{
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/* Don't do anything if already set up or invalid */
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if (ctx == NULL || ctx->pk_info != NULL) {
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return 0;
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}
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/* Should never happen when we're called */
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if (info->rs_alloc_func == NULL || info->rs_free_func == NULL) {
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return MBEDTLS_ERR_PK_BAD_INPUT_DATA;
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}
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if ((ctx->rs_ctx = info->rs_alloc_func()) == NULL) {
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return MBEDTLS_ERR_PK_ALLOC_FAILED;
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}
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ctx->pk_info = info;
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return 0;
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}
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#endif /* MBEDTLS_ECDSA_C && MBEDTLS_ECP_RESTARTABLE */
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/*
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* Verify a signature (restartable)
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*/
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int mbedtls_pk_verify_restartable(mbedtls_pk_context *ctx,
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mbedtls_md_type_t md_alg,
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const unsigned char *hash, size_t hash_len,
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const unsigned char *sig, size_t sig_len,
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mbedtls_pk_restart_ctx *rs_ctx)
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{
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if ((md_alg != MBEDTLS_MD_NONE || hash_len != 0) && hash == NULL) {
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return MBEDTLS_ERR_PK_BAD_INPUT_DATA;
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}
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if (ctx->pk_info == NULL ||
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pk_hashlen_helper(md_alg, &hash_len) != 0) {
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return MBEDTLS_ERR_PK_BAD_INPUT_DATA;
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}
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#if defined(MBEDTLS_ECDSA_C) && defined(MBEDTLS_ECP_RESTARTABLE)
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/* optimization: use non-restartable version if restart disabled */
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if (rs_ctx != NULL &&
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mbedtls_ecp_restart_is_enabled() &&
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ctx->pk_info->verify_rs_func != NULL) {
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int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
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if ((ret = pk_restart_setup(rs_ctx, ctx->pk_info)) != 0) {
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return ret;
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}
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ret = ctx->pk_info->verify_rs_func(ctx,
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md_alg, hash, hash_len, sig, sig_len, rs_ctx->rs_ctx);
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if (ret != MBEDTLS_ERR_ECP_IN_PROGRESS) {
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mbedtls_pk_restart_free(rs_ctx);
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}
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return ret;
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}
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#else /* MBEDTLS_ECDSA_C && MBEDTLS_ECP_RESTARTABLE */
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(void) rs_ctx;
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#endif /* MBEDTLS_ECDSA_C && MBEDTLS_ECP_RESTARTABLE */
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if (ctx->pk_info->verify_func == NULL) {
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return MBEDTLS_ERR_PK_TYPE_MISMATCH;
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}
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return ctx->pk_info->verify_func(ctx, md_alg, hash, hash_len,
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sig, sig_len);
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}
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/*
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* Verify a signature
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*/
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int mbedtls_pk_verify(mbedtls_pk_context *ctx, mbedtls_md_type_t md_alg,
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const unsigned char *hash, size_t hash_len,
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const unsigned char *sig, size_t sig_len)
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{
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return mbedtls_pk_verify_restartable(ctx, md_alg, hash, hash_len,
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sig, sig_len, NULL);
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}
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/*
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* Verify a signature with options
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*/
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int mbedtls_pk_verify_ext(mbedtls_pk_type_t type, const void *options,
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mbedtls_pk_context *ctx, mbedtls_md_type_t md_alg,
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const unsigned char *hash, size_t hash_len,
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const unsigned char *sig, size_t sig_len)
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{
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if ((md_alg != MBEDTLS_MD_NONE || hash_len != 0) && hash == NULL) {
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return MBEDTLS_ERR_PK_BAD_INPUT_DATA;
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}
|
|
|
|
if (ctx->pk_info == NULL) {
|
|
return MBEDTLS_ERR_PK_BAD_INPUT_DATA;
|
|
}
|
|
|
|
if (!mbedtls_pk_can_do(ctx, type)) {
|
|
return MBEDTLS_ERR_PK_TYPE_MISMATCH;
|
|
}
|
|
|
|
if (type != MBEDTLS_PK_RSASSA_PSS) {
|
|
/* General case: no options */
|
|
if (options != NULL) {
|
|
return MBEDTLS_ERR_PK_BAD_INPUT_DATA;
|
|
}
|
|
|
|
return mbedtls_pk_verify(ctx, md_alg, hash, hash_len, sig, sig_len);
|
|
}
|
|
|
|
#if defined(MBEDTLS_RSA_C) && defined(MBEDTLS_PKCS1_V21)
|
|
int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
|
|
const mbedtls_pk_rsassa_pss_options *pss_opts;
|
|
|
|
if (md_alg == MBEDTLS_MD_NONE && UINT_MAX < hash_len) {
|
|
return MBEDTLS_ERR_PK_BAD_INPUT_DATA;
|
|
}
|
|
|
|
if (options == NULL) {
|
|
return MBEDTLS_ERR_PK_BAD_INPUT_DATA;
|
|
}
|
|
|
|
pss_opts = (const mbedtls_pk_rsassa_pss_options *) options;
|
|
|
|
#if defined(MBEDTLS_USE_PSA_CRYPTO)
|
|
if (pss_opts->mgf1_hash_id == md_alg) {
|
|
unsigned char buf[MBEDTLS_PK_RSA_PUB_DER_MAX_BYTES];
|
|
unsigned char *p;
|
|
int key_len;
|
|
size_t signature_length;
|
|
psa_status_t status = PSA_ERROR_DATA_CORRUPT;
|
|
psa_status_t destruction_status = PSA_ERROR_DATA_CORRUPT;
|
|
|
|
psa_algorithm_t psa_md_alg = mbedtls_hash_info_psa_from_md(md_alg);
|
|
mbedtls_svc_key_id_t key_id = MBEDTLS_SVC_KEY_ID_INIT;
|
|
psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
|
|
psa_algorithm_t psa_sig_alg = PSA_ALG_RSA_PSS_ANY_SALT(psa_md_alg);
|
|
p = buf + sizeof(buf);
|
|
key_len = mbedtls_pk_write_pubkey(&p, buf, ctx);
|
|
|
|
if (key_len < 0) {
|
|
return key_len;
|
|
}
|
|
|
|
psa_set_key_type(&attributes, PSA_KEY_TYPE_RSA_PUBLIC_KEY);
|
|
psa_set_key_usage_flags(&attributes, PSA_KEY_USAGE_VERIFY_HASH);
|
|
psa_set_key_algorithm(&attributes, psa_sig_alg);
|
|
|
|
status = psa_import_key(&attributes,
|
|
buf + sizeof(buf) - key_len, key_len,
|
|
&key_id);
|
|
if (status != PSA_SUCCESS) {
|
|
psa_destroy_key(key_id);
|
|
return PSA_PK_TO_MBEDTLS_ERR(status);
|
|
}
|
|
|
|
/* This function requires returning MBEDTLS_ERR_PK_SIG_LEN_MISMATCH
|
|
* on a valid signature with trailing data in a buffer, but
|
|
* mbedtls_psa_rsa_verify_hash requires the sig_len to be exact,
|
|
* so for this reason the passed sig_len is overwritten. Smaller
|
|
* signature lengths should not be accepted for verification. */
|
|
signature_length = sig_len > mbedtls_pk_get_len(ctx) ?
|
|
mbedtls_pk_get_len(ctx) : sig_len;
|
|
status = psa_verify_hash(key_id, psa_sig_alg, hash,
|
|
hash_len, sig, signature_length);
|
|
destruction_status = psa_destroy_key(key_id);
|
|
|
|
if (status == PSA_SUCCESS && sig_len > mbedtls_pk_get_len(ctx)) {
|
|
return MBEDTLS_ERR_PK_SIG_LEN_MISMATCH;
|
|
}
|
|
|
|
if (status == PSA_SUCCESS) {
|
|
status = destruction_status;
|
|
}
|
|
|
|
return PSA_PK_RSA_TO_MBEDTLS_ERR(status);
|
|
} else
|
|
#endif
|
|
{
|
|
if (sig_len < mbedtls_pk_get_len(ctx)) {
|
|
return MBEDTLS_ERR_RSA_VERIFY_FAILED;
|
|
}
|
|
|
|
ret = mbedtls_rsa_rsassa_pss_verify_ext(mbedtls_pk_rsa(*ctx),
|
|
md_alg, (unsigned int) hash_len, hash,
|
|
pss_opts->mgf1_hash_id,
|
|
pss_opts->expected_salt_len,
|
|
sig);
|
|
if (ret != 0) {
|
|
return ret;
|
|
}
|
|
|
|
if (sig_len > mbedtls_pk_get_len(ctx)) {
|
|
return MBEDTLS_ERR_PK_SIG_LEN_MISMATCH;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
#else
|
|
return MBEDTLS_ERR_PK_FEATURE_UNAVAILABLE;
|
|
#endif /* MBEDTLS_RSA_C && MBEDTLS_PKCS1_V21 */
|
|
}
|
|
|
|
/*
|
|
* Make a signature (restartable)
|
|
*/
|
|
int mbedtls_pk_sign_restartable(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,
|
|
mbedtls_pk_restart_ctx *rs_ctx)
|
|
{
|
|
if ((md_alg != MBEDTLS_MD_NONE || hash_len != 0) && hash == NULL) {
|
|
return MBEDTLS_ERR_PK_BAD_INPUT_DATA;
|
|
}
|
|
|
|
if (ctx->pk_info == NULL || pk_hashlen_helper(md_alg, &hash_len) != 0) {
|
|
return MBEDTLS_ERR_PK_BAD_INPUT_DATA;
|
|
}
|
|
|
|
#if defined(MBEDTLS_ECDSA_C) && defined(MBEDTLS_ECP_RESTARTABLE)
|
|
/* optimization: use non-restartable version if restart disabled */
|
|
if (rs_ctx != NULL &&
|
|
mbedtls_ecp_restart_is_enabled() &&
|
|
ctx->pk_info->sign_rs_func != NULL) {
|
|
int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
|
|
|
|
if ((ret = pk_restart_setup(rs_ctx, ctx->pk_info)) != 0) {
|
|
return ret;
|
|
}
|
|
|
|
ret = ctx->pk_info->sign_rs_func(ctx, md_alg,
|
|
hash, hash_len,
|
|
sig, sig_size, sig_len,
|
|
f_rng, p_rng, rs_ctx->rs_ctx);
|
|
|
|
if (ret != MBEDTLS_ERR_ECP_IN_PROGRESS) {
|
|
mbedtls_pk_restart_free(rs_ctx);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
#else /* MBEDTLS_ECDSA_C && MBEDTLS_ECP_RESTARTABLE */
|
|
(void) rs_ctx;
|
|
#endif /* MBEDTLS_ECDSA_C && MBEDTLS_ECP_RESTARTABLE */
|
|
|
|
if (ctx->pk_info->sign_func == NULL) {
|
|
return MBEDTLS_ERR_PK_TYPE_MISMATCH;
|
|
}
|
|
|
|
return ctx->pk_info->sign_func(ctx, md_alg,
|
|
hash, hash_len,
|
|
sig, sig_size, sig_len,
|
|
f_rng, p_rng);
|
|
}
|
|
|
|
/*
|
|
* Make a signature
|
|
*/
|
|
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_size, size_t *sig_len,
|
|
int (*f_rng)(void *, unsigned char *, size_t), void *p_rng)
|
|
{
|
|
return mbedtls_pk_sign_restartable(ctx, md_alg, hash, hash_len,
|
|
sig, sig_size, sig_len,
|
|
f_rng, p_rng, NULL);
|
|
}
|
|
|
|
#if defined(MBEDTLS_PSA_CRYPTO_C)
|
|
/*
|
|
* Make a signature given a signature type.
|
|
*/
|
|
int mbedtls_pk_sign_ext(mbedtls_pk_type_t pk_type,
|
|
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)
|
|
{
|
|
#if defined(MBEDTLS_RSA_C)
|
|
psa_algorithm_t psa_md_alg;
|
|
#endif /* MBEDTLS_RSA_C */
|
|
*sig_len = 0;
|
|
|
|
if (ctx->pk_info == NULL) {
|
|
return MBEDTLS_ERR_PK_BAD_INPUT_DATA;
|
|
}
|
|
|
|
if (!mbedtls_pk_can_do(ctx, pk_type)) {
|
|
return MBEDTLS_ERR_PK_TYPE_MISMATCH;
|
|
}
|
|
|
|
if (pk_type != MBEDTLS_PK_RSASSA_PSS) {
|
|
return mbedtls_pk_sign(ctx, md_alg, hash, hash_len,
|
|
sig, sig_size, sig_len, f_rng, p_rng);
|
|
}
|
|
|
|
#if defined(MBEDTLS_RSA_C)
|
|
psa_md_alg = mbedtls_hash_info_psa_from_md(md_alg);
|
|
if (psa_md_alg == 0) {
|
|
return MBEDTLS_ERR_PK_BAD_INPUT_DATA;
|
|
}
|
|
|
|
if (mbedtls_pk_get_type(ctx) == MBEDTLS_PK_OPAQUE) {
|
|
const mbedtls_svc_key_id_t *key = (const mbedtls_svc_key_id_t *) ctx->pk_ctx;
|
|
psa_status_t status;
|
|
|
|
status = psa_sign_hash(*key, PSA_ALG_RSA_PSS(psa_md_alg),
|
|
hash, hash_len,
|
|
sig, sig_size, sig_len);
|
|
return PSA_PK_RSA_TO_MBEDTLS_ERR(status);
|
|
}
|
|
|
|
return mbedtls_pk_psa_rsa_sign_ext(PSA_ALG_RSA_PSS(psa_md_alg),
|
|
ctx->pk_ctx, hash, hash_len,
|
|
sig, sig_size, sig_len);
|
|
#else /* MBEDTLS_RSA_C */
|
|
return MBEDTLS_ERR_PK_FEATURE_UNAVAILABLE;
|
|
#endif /* !MBEDTLS_RSA_C */
|
|
|
|
}
|
|
#endif /* MBEDTLS_PSA_CRYPTO_C */
|
|
|
|
/*
|
|
* Decrypt message
|
|
*/
|
|
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)
|
|
{
|
|
if (ctx->pk_info == NULL) {
|
|
return MBEDTLS_ERR_PK_BAD_INPUT_DATA;
|
|
}
|
|
|
|
if (ctx->pk_info->decrypt_func == NULL) {
|
|
return MBEDTLS_ERR_PK_TYPE_MISMATCH;
|
|
}
|
|
|
|
return ctx->pk_info->decrypt_func(ctx, input, ilen,
|
|
output, olen, osize, f_rng, p_rng);
|
|
}
|
|
|
|
/*
|
|
* Encrypt message
|
|
*/
|
|
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)
|
|
{
|
|
if (ctx->pk_info == NULL) {
|
|
return MBEDTLS_ERR_PK_BAD_INPUT_DATA;
|
|
}
|
|
|
|
if (ctx->pk_info->encrypt_func == NULL) {
|
|
return MBEDTLS_ERR_PK_TYPE_MISMATCH;
|
|
}
|
|
|
|
return ctx->pk_info->encrypt_func(ctx, input, ilen,
|
|
output, olen, osize, f_rng, p_rng);
|
|
}
|
|
|
|
/*
|
|
* Check public-private key pair
|
|
*/
|
|
int mbedtls_pk_check_pair(const mbedtls_pk_context *pub,
|
|
const mbedtls_pk_context *prv,
|
|
int (*f_rng)(void *, unsigned char *, size_t),
|
|
void *p_rng)
|
|
{
|
|
if (pub->pk_info == NULL ||
|
|
prv->pk_info == NULL) {
|
|
return MBEDTLS_ERR_PK_BAD_INPUT_DATA;
|
|
}
|
|
|
|
if (f_rng == NULL) {
|
|
return MBEDTLS_ERR_PK_BAD_INPUT_DATA;
|
|
}
|
|
|
|
if (prv->pk_info->check_pair_func == NULL) {
|
|
return MBEDTLS_ERR_PK_FEATURE_UNAVAILABLE;
|
|
}
|
|
|
|
if (prv->pk_info->type == MBEDTLS_PK_RSA_ALT) {
|
|
if (pub->pk_info->type != MBEDTLS_PK_RSA) {
|
|
return MBEDTLS_ERR_PK_TYPE_MISMATCH;
|
|
}
|
|
} else {
|
|
if (pub->pk_info != prv->pk_info) {
|
|
return MBEDTLS_ERR_PK_TYPE_MISMATCH;
|
|
}
|
|
}
|
|
|
|
return prv->pk_info->check_pair_func((mbedtls_pk_context *) pub,
|
|
(mbedtls_pk_context *) prv,
|
|
f_rng, p_rng);
|
|
}
|
|
|
|
/*
|
|
* Get key size in bits
|
|
*/
|
|
size_t mbedtls_pk_get_bitlen(const mbedtls_pk_context *ctx)
|
|
{
|
|
/* For backward compatibility, accept NULL or a context that
|
|
* isn't set up yet, and return a fake value that should be safe. */
|
|
if (ctx == NULL || ctx->pk_info == NULL) {
|
|
return 0;
|
|
}
|
|
|
|
return ctx->pk_info->get_bitlen((mbedtls_pk_context *) ctx);
|
|
}
|
|
|
|
/*
|
|
* Export debug information
|
|
*/
|
|
int mbedtls_pk_debug(const mbedtls_pk_context *ctx, mbedtls_pk_debug_item *items)
|
|
{
|
|
if (ctx->pk_info == NULL) {
|
|
return MBEDTLS_ERR_PK_BAD_INPUT_DATA;
|
|
}
|
|
|
|
if (ctx->pk_info->debug_func == NULL) {
|
|
return MBEDTLS_ERR_PK_TYPE_MISMATCH;
|
|
}
|
|
|
|
ctx->pk_info->debug_func((mbedtls_pk_context *) ctx, items);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Access the PK type name
|
|
*/
|
|
const char *mbedtls_pk_get_name(const mbedtls_pk_context *ctx)
|
|
{
|
|
if (ctx == NULL || ctx->pk_info == NULL) {
|
|
return "invalid PK";
|
|
}
|
|
|
|
return ctx->pk_info->name;
|
|
}
|
|
|
|
/*
|
|
* Access the PK type
|
|
*/
|
|
mbedtls_pk_type_t mbedtls_pk_get_type(const mbedtls_pk_context *ctx)
|
|
{
|
|
if (ctx == NULL || ctx->pk_info == NULL) {
|
|
return MBEDTLS_PK_NONE;
|
|
}
|
|
|
|
return ctx->pk_info->type;
|
|
}
|
|
|
|
#if defined(MBEDTLS_USE_PSA_CRYPTO)
|
|
/*
|
|
* Load the key to a PSA key slot,
|
|
* then turn the PK context into a wrapper for that key slot.
|
|
*
|
|
* Currently only works for EC & RSA private keys.
|
|
*/
|
|
int mbedtls_pk_wrap_as_opaque(mbedtls_pk_context *pk,
|
|
mbedtls_svc_key_id_t *key,
|
|
psa_algorithm_t alg,
|
|
psa_key_usage_t usage,
|
|
psa_algorithm_t alg2)
|
|
{
|
|
#if !defined(MBEDTLS_ECP_LIGHT) && !defined(MBEDTLS_RSA_C)
|
|
((void) pk);
|
|
((void) key);
|
|
((void) alg);
|
|
((void) usage);
|
|
((void) alg2);
|
|
#else /* !MBEDTLS_ECP_LIGHT && !MBEDTLS_RSA_C */
|
|
#if defined(MBEDTLS_ECP_LIGHT)
|
|
if (mbedtls_pk_get_type(pk) == MBEDTLS_PK_ECKEY) {
|
|
mbedtls_ecp_keypair *ec;
|
|
unsigned char d[MBEDTLS_ECP_MAX_BYTES];
|
|
size_t d_len;
|
|
psa_ecc_family_t curve_id;
|
|
psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
|
|
psa_key_type_t key_type;
|
|
size_t bits;
|
|
int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
|
|
psa_status_t status;
|
|
|
|
/* export the private key material in the format PSA wants */
|
|
ec = mbedtls_pk_ec(*pk);
|
|
d_len = PSA_BITS_TO_BYTES(ec->grp.nbits);
|
|
if ((ret = mbedtls_ecp_write_key(ec, d, d_len)) != 0) {
|
|
return ret;
|
|
}
|
|
|
|
curve_id = mbedtls_ecc_group_to_psa(ec->grp.id, &bits);
|
|
key_type = PSA_KEY_TYPE_ECC_KEY_PAIR(curve_id);
|
|
|
|
/* prepare the key attributes */
|
|
psa_set_key_type(&attributes, key_type);
|
|
psa_set_key_bits(&attributes, bits);
|
|
psa_set_key_usage_flags(&attributes, usage);
|
|
psa_set_key_algorithm(&attributes, alg);
|
|
if (alg2 != PSA_ALG_NONE) {
|
|
psa_set_key_enrollment_algorithm(&attributes, alg2);
|
|
}
|
|
|
|
/* import private key into PSA */
|
|
status = psa_import_key(&attributes, d, d_len, key);
|
|
mbedtls_platform_zeroize(d, sizeof(d));
|
|
if (status != PSA_SUCCESS) {
|
|
return PSA_PK_TO_MBEDTLS_ERR(status);
|
|
}
|
|
|
|
/* make PK context wrap the key slot */
|
|
mbedtls_pk_free(pk);
|
|
mbedtls_pk_init(pk);
|
|
|
|
return mbedtls_pk_setup_opaque(pk, *key);
|
|
} else
|
|
#endif /* MBEDTLS_ECP_LIGHT */
|
|
#if defined(MBEDTLS_RSA_C)
|
|
if (mbedtls_pk_get_type(pk) == MBEDTLS_PK_RSA) {
|
|
unsigned char buf[MBEDTLS_PK_RSA_PRV_DER_MAX_BYTES];
|
|
psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
|
|
int key_len;
|
|
psa_status_t status;
|
|
|
|
/* export the private key material in the format PSA wants */
|
|
key_len = mbedtls_pk_write_key_der(pk, buf, sizeof(buf));
|
|
if (key_len <= 0) {
|
|
return MBEDTLS_ERR_PK_BAD_INPUT_DATA;
|
|
}
|
|
|
|
/* prepare the key attributes */
|
|
psa_set_key_type(&attributes, PSA_KEY_TYPE_RSA_KEY_PAIR);
|
|
psa_set_key_bits(&attributes, mbedtls_pk_get_bitlen(pk));
|
|
psa_set_key_usage_flags(&attributes, usage);
|
|
psa_set_key_algorithm(&attributes, alg);
|
|
if (alg2 != PSA_ALG_NONE) {
|
|
psa_set_key_enrollment_algorithm(&attributes, alg2);
|
|
}
|
|
|
|
/* import private key into PSA */
|
|
status = psa_import_key(&attributes,
|
|
buf + sizeof(buf) - key_len,
|
|
key_len, key);
|
|
|
|
mbedtls_platform_zeroize(buf, sizeof(buf));
|
|
|
|
if (status != PSA_SUCCESS) {
|
|
return PSA_PK_TO_MBEDTLS_ERR(status);
|
|
}
|
|
|
|
/* make PK context wrap the key slot */
|
|
mbedtls_pk_free(pk);
|
|
mbedtls_pk_init(pk);
|
|
|
|
return mbedtls_pk_setup_opaque(pk, *key);
|
|
} else
|
|
#endif /* MBEDTLS_RSA_C */
|
|
#endif /* !MBEDTLS_ECP_LIGHT && !MBEDTLS_RSA_C */
|
|
return MBEDTLS_ERR_PK_TYPE_MISMATCH;
|
|
}
|
|
#endif /* MBEDTLS_USE_PSA_CRYPTO */
|
|
#endif /* MBEDTLS_PK_C */
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