979 lines
27 KiB
C
979 lines
27 KiB
C
/*
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* Public Key abstraction layer: wrapper functions
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*
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* Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
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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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* This file is part of mbed TLS (https://tls.mbed.org)
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*/
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#if !defined(MBEDTLS_CONFIG_FILE)
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#include "mbedtls/config.h"
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#else
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#include MBEDTLS_CONFIG_FILE
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#endif
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#if defined(MBEDTLS_PK_C)
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#include "mbedtls/pk_internal.h"
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/* Even if RSA not activated, for the sake of RSA-alt */
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#include "mbedtls/rsa.h"
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#include <string.h>
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#if defined(MBEDTLS_ECP_C)
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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_PK_RSA_ALT_SUPPORT)
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#include "mbedtls/platform_util.h"
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#endif
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#if defined(MBEDTLS_USE_PSA_CRYPTO)
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#include "psa/crypto.h"
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#include "mbedtls/x509.h"
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#include "mbedtls/asn1.h"
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#endif
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#if defined(MBEDTLS_PLATFORM_C)
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#include "mbedtls/platform.h"
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#else
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#include <stdlib.h>
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#define mbedtls_calloc calloc
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#define mbedtls_free free
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#endif
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#include <limits.h>
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#include <stdint.h>
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#if defined(MBEDTLS_RSA_C)
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static int rsa_can_do( mbedtls_pk_type_t type )
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{
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return( type == MBEDTLS_PK_RSA ||
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type == MBEDTLS_PK_RSASSA_PSS );
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}
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static size_t rsa_get_bitlen( const void *ctx )
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{
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const mbedtls_rsa_context * rsa = (const mbedtls_rsa_context *) ctx;
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return( 8 * mbedtls_rsa_get_len( rsa ) );
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}
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static int rsa_verify_wrap( void *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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int ret;
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mbedtls_rsa_context * rsa = (mbedtls_rsa_context *) ctx;
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size_t rsa_len = mbedtls_rsa_get_len( rsa );
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#if SIZE_MAX > UINT_MAX
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if( md_alg == MBEDTLS_MD_NONE && UINT_MAX < hash_len )
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return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
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#endif /* SIZE_MAX > UINT_MAX */
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if( sig_len < rsa_len )
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return( MBEDTLS_ERR_RSA_VERIFY_FAILED );
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if( ( ret = mbedtls_rsa_pkcs1_verify( rsa, NULL, NULL,
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MBEDTLS_RSA_PUBLIC, md_alg,
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(unsigned int) hash_len, hash, sig ) ) != 0 )
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return( ret );
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/* The buffer contains a valid signature followed by extra data.
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* We have a special error code for that so that so that callers can
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* use mbedtls_pk_verify() to check "Does the buffer start with a
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* valid signature?" and not just "Does the buffer contain a valid
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* signature?". */
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if( sig_len > rsa_len )
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return( MBEDTLS_ERR_PK_SIG_LEN_MISMATCH );
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return( 0 );
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}
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static int rsa_sign_wrap( void *ctx, mbedtls_md_type_t md_alg,
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const unsigned char *hash, size_t hash_len,
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unsigned char *sig, size_t *sig_len,
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int (*f_rng)(void *, unsigned char *, size_t), void *p_rng )
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{
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mbedtls_rsa_context * rsa = (mbedtls_rsa_context *) ctx;
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#if SIZE_MAX > UINT_MAX
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if( md_alg == MBEDTLS_MD_NONE && UINT_MAX < hash_len )
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return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
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#endif /* SIZE_MAX > UINT_MAX */
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*sig_len = mbedtls_rsa_get_len( rsa );
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return( mbedtls_rsa_pkcs1_sign( rsa, f_rng, p_rng, MBEDTLS_RSA_PRIVATE,
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md_alg, (unsigned int) hash_len, hash, sig ) );
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}
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static int rsa_decrypt_wrap( void *ctx,
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const unsigned char *input, size_t ilen,
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unsigned char *output, size_t *olen, size_t osize,
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int (*f_rng)(void *, unsigned char *, size_t), void *p_rng )
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{
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mbedtls_rsa_context * rsa = (mbedtls_rsa_context *) ctx;
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if( ilen != mbedtls_rsa_get_len( rsa ) )
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return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
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return( mbedtls_rsa_pkcs1_decrypt( rsa, f_rng, p_rng,
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MBEDTLS_RSA_PRIVATE, olen, input, output, osize ) );
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}
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static int rsa_encrypt_wrap( void *ctx,
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const unsigned char *input, size_t ilen,
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unsigned char *output, size_t *olen, size_t osize,
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int (*f_rng)(void *, unsigned char *, size_t), void *p_rng )
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{
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mbedtls_rsa_context * rsa = (mbedtls_rsa_context *) ctx;
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*olen = mbedtls_rsa_get_len( rsa );
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if( *olen > osize )
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return( MBEDTLS_ERR_RSA_OUTPUT_TOO_LARGE );
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return( mbedtls_rsa_pkcs1_encrypt( rsa, f_rng, p_rng, MBEDTLS_RSA_PUBLIC,
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ilen, input, output ) );
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}
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static int rsa_check_pair_wrap( const void *pub, const void *prv )
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{
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return( mbedtls_rsa_check_pub_priv( (const mbedtls_rsa_context *) pub,
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(const mbedtls_rsa_context *) prv ) );
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}
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static void *rsa_alloc_wrap( void )
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{
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void *ctx = mbedtls_calloc( 1, sizeof( mbedtls_rsa_context ) );
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if( ctx != NULL )
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mbedtls_rsa_init( (mbedtls_rsa_context *) ctx, 0, 0 );
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return( ctx );
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}
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static void rsa_free_wrap( void *ctx )
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{
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mbedtls_rsa_free( (mbedtls_rsa_context *) ctx );
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mbedtls_free( ctx );
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}
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static void rsa_debug( const void *ctx, mbedtls_pk_debug_item *items )
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{
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items->type = MBEDTLS_PK_DEBUG_MPI;
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items->name = "rsa.N";
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items->value = &( ((mbedtls_rsa_context *) ctx)->N );
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items++;
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items->type = MBEDTLS_PK_DEBUG_MPI;
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items->name = "rsa.E";
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items->value = &( ((mbedtls_rsa_context *) ctx)->E );
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}
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const mbedtls_pk_info_t mbedtls_rsa_info = {
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MBEDTLS_PK_RSA,
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"RSA",
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rsa_get_bitlen,
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rsa_can_do,
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rsa_verify_wrap,
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rsa_sign_wrap,
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#if defined(MBEDTLS_ECDSA_C) && defined(MBEDTLS_ECP_RESTARTABLE)
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NULL,
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NULL,
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#endif
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rsa_decrypt_wrap,
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rsa_encrypt_wrap,
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rsa_check_pair_wrap,
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rsa_alloc_wrap,
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rsa_free_wrap,
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#if defined(MBEDTLS_ECDSA_C) && defined(MBEDTLS_ECP_RESTARTABLE)
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NULL,
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NULL,
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#endif
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rsa_debug,
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};
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#endif /* MBEDTLS_RSA_C */
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#if defined(MBEDTLS_ECP_C)
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/*
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* Generic EC key
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*/
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static int eckey_can_do( mbedtls_pk_type_t type )
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{
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return( type == MBEDTLS_PK_ECKEY ||
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type == MBEDTLS_PK_ECKEY_DH ||
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type == MBEDTLS_PK_ECDSA );
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}
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static size_t eckey_get_bitlen( const void *ctx )
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{
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return( ((mbedtls_ecp_keypair *) ctx)->grp.pbits );
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}
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#if defined(MBEDTLS_ECDSA_C)
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/* Forward declarations */
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static int ecdsa_verify_wrap( void *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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static int ecdsa_sign_wrap( void *ctx, mbedtls_md_type_t md_alg,
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const unsigned char *hash, size_t hash_len,
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unsigned char *sig, size_t *sig_len,
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int (*f_rng)(void *, unsigned char *, size_t), void *p_rng );
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static int eckey_verify_wrap( void *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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int ret;
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mbedtls_ecdsa_context ecdsa;
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mbedtls_ecdsa_init( &ecdsa );
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if( ( ret = mbedtls_ecdsa_from_keypair( &ecdsa, ctx ) ) == 0 )
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ret = ecdsa_verify_wrap( &ecdsa, md_alg, hash, hash_len, sig, sig_len );
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mbedtls_ecdsa_free( &ecdsa );
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return( ret );
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}
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static int eckey_sign_wrap( void *ctx, mbedtls_md_type_t md_alg,
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const unsigned char *hash, size_t hash_len,
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unsigned char *sig, size_t *sig_len,
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int (*f_rng)(void *, unsigned char *, size_t), void *p_rng )
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{
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int ret;
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mbedtls_ecdsa_context ecdsa;
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mbedtls_ecdsa_init( &ecdsa );
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if( ( ret = mbedtls_ecdsa_from_keypair( &ecdsa, ctx ) ) == 0 )
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ret = ecdsa_sign_wrap( &ecdsa, md_alg, hash, hash_len, sig, sig_len,
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f_rng, p_rng );
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mbedtls_ecdsa_free( &ecdsa );
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return( ret );
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}
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#if defined(MBEDTLS_ECP_RESTARTABLE)
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/* Forward declarations */
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static int ecdsa_verify_rs_wrap( void *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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void *rs_ctx );
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static int ecdsa_sign_rs_wrap( void *ctx, mbedtls_md_type_t md_alg,
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const unsigned char *hash, size_t hash_len,
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unsigned char *sig, size_t *sig_len,
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int (*f_rng)(void *, unsigned char *, size_t), void *p_rng,
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void *rs_ctx );
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/*
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* Restart context for ECDSA operations with ECKEY context
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*
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* We need to store an actual ECDSA context, as we need to pass the same to
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* the underlying ecdsa function, so we can't create it on the fly every time.
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*/
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typedef struct
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{
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mbedtls_ecdsa_restart_ctx ecdsa_rs;
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mbedtls_ecdsa_context ecdsa_ctx;
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} eckey_restart_ctx;
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static void *eckey_rs_alloc( void )
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{
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eckey_restart_ctx *rs_ctx;
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void *ctx = mbedtls_calloc( 1, sizeof( eckey_restart_ctx ) );
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if( ctx != NULL )
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{
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rs_ctx = ctx;
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mbedtls_ecdsa_restart_init( &rs_ctx->ecdsa_rs );
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mbedtls_ecdsa_init( &rs_ctx->ecdsa_ctx );
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}
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return( ctx );
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}
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static void eckey_rs_free( void *ctx )
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{
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eckey_restart_ctx *rs_ctx;
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if( ctx == NULL)
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return;
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rs_ctx = ctx;
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mbedtls_ecdsa_restart_free( &rs_ctx->ecdsa_rs );
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mbedtls_ecdsa_free( &rs_ctx->ecdsa_ctx );
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mbedtls_free( ctx );
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}
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static int eckey_verify_rs_wrap( void *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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void *rs_ctx )
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{
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int ret;
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eckey_restart_ctx *rs = rs_ctx;
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/* Should never happen */
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if( rs == NULL )
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return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
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/* set up our own sub-context if needed (that is, on first run) */
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if( rs->ecdsa_ctx.grp.pbits == 0 )
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MBEDTLS_MPI_CHK( mbedtls_ecdsa_from_keypair( &rs->ecdsa_ctx, ctx ) );
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MBEDTLS_MPI_CHK( ecdsa_verify_rs_wrap( &rs->ecdsa_ctx,
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md_alg, hash, hash_len,
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sig, sig_len, &rs->ecdsa_rs ) );
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cleanup:
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return( ret );
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}
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static int eckey_sign_rs_wrap( void *ctx, mbedtls_md_type_t md_alg,
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const unsigned char *hash, size_t hash_len,
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unsigned char *sig, size_t *sig_len,
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int (*f_rng)(void *, unsigned char *, size_t), void *p_rng,
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void *rs_ctx )
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{
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int ret;
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eckey_restart_ctx *rs = rs_ctx;
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/* Should never happen */
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if( rs == NULL )
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return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
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/* set up our own sub-context if needed (that is, on first run) */
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if( rs->ecdsa_ctx.grp.pbits == 0 )
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MBEDTLS_MPI_CHK( mbedtls_ecdsa_from_keypair( &rs->ecdsa_ctx, ctx ) );
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MBEDTLS_MPI_CHK( ecdsa_sign_rs_wrap( &rs->ecdsa_ctx, md_alg,
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hash, hash_len, sig, sig_len,
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f_rng, p_rng, &rs->ecdsa_rs ) );
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cleanup:
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return( ret );
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}
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#endif /* MBEDTLS_ECP_RESTARTABLE */
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#endif /* MBEDTLS_ECDSA_C */
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static int eckey_check_pair( const void *pub, const void *prv )
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{
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return( mbedtls_ecp_check_pub_priv( (const mbedtls_ecp_keypair *) pub,
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(const mbedtls_ecp_keypair *) prv ) );
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}
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static void *eckey_alloc_wrap( void )
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{
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void *ctx = mbedtls_calloc( 1, sizeof( mbedtls_ecp_keypair ) );
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if( ctx != NULL )
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mbedtls_ecp_keypair_init( ctx );
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return( ctx );
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}
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static void eckey_free_wrap( void *ctx )
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{
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mbedtls_ecp_keypair_free( (mbedtls_ecp_keypair *) ctx );
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mbedtls_free( ctx );
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}
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static void eckey_debug( const void *ctx, mbedtls_pk_debug_item *items )
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{
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items->type = MBEDTLS_PK_DEBUG_ECP;
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items->name = "eckey.Q";
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items->value = &( ((mbedtls_ecp_keypair *) ctx)->Q );
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}
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const mbedtls_pk_info_t mbedtls_eckey_info = {
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MBEDTLS_PK_ECKEY,
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"EC",
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eckey_get_bitlen,
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eckey_can_do,
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#if defined(MBEDTLS_ECDSA_C)
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eckey_verify_wrap,
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eckey_sign_wrap,
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#if defined(MBEDTLS_ECP_RESTARTABLE)
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eckey_verify_rs_wrap,
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eckey_sign_rs_wrap,
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#endif
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#else /* MBEDTLS_ECDSA_C */
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NULL,
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NULL,
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#endif /* MBEDTLS_ECDSA_C */
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NULL,
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NULL,
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eckey_check_pair,
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eckey_alloc_wrap,
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eckey_free_wrap,
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#if defined(MBEDTLS_ECDSA_C) && defined(MBEDTLS_ECP_RESTARTABLE)
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eckey_rs_alloc,
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eckey_rs_free,
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#endif
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eckey_debug,
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};
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/*
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* EC key restricted to ECDH
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*/
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static int eckeydh_can_do( mbedtls_pk_type_t type )
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{
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return( type == MBEDTLS_PK_ECKEY ||
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type == MBEDTLS_PK_ECKEY_DH );
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}
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const mbedtls_pk_info_t mbedtls_eckeydh_info = {
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MBEDTLS_PK_ECKEY_DH,
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"EC_DH",
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eckey_get_bitlen, /* Same underlying key structure */
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eckeydh_can_do,
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NULL,
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NULL,
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#if defined(MBEDTLS_ECDSA_C) && defined(MBEDTLS_ECP_RESTARTABLE)
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NULL,
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NULL,
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#endif
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NULL,
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NULL,
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eckey_check_pair,
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eckey_alloc_wrap, /* Same underlying key structure */
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eckey_free_wrap, /* Same underlying key structure */
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#if defined(MBEDTLS_ECDSA_C) && defined(MBEDTLS_ECP_RESTARTABLE)
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NULL,
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NULL,
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#endif
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eckey_debug, /* Same underlying key structure */
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};
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#endif /* MBEDTLS_ECP_C */
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#if defined(MBEDTLS_ECDSA_C)
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static int ecdsa_can_do( mbedtls_pk_type_t type )
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{
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return( type == MBEDTLS_PK_ECDSA );
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}
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|
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#if defined(MBEDTLS_USE_PSA_CRYPTO)
|
|
static psa_status_t mbedtls_psa_get_free_key_slot( psa_key_slot_t *key )
|
|
{
|
|
for( psa_key_slot_t slot = 1; slot <= 32; slot++ )
|
|
{
|
|
if( psa_get_key_information( slot, NULL, NULL ) == PSA_ERROR_EMPTY_SLOT )
|
|
{
|
|
*key = slot;
|
|
return( PSA_SUCCESS );
|
|
}
|
|
}
|
|
return( PSA_ERROR_INSUFFICIENT_MEMORY );
|
|
}
|
|
|
|
static psa_algorithm_t translate_md_to_psa( mbedtls_md_type_t md_alg )
|
|
{
|
|
switch( md_alg )
|
|
{
|
|
#if defined(MBEDTLS_MD2_C)
|
|
case MBEDTLS_MD_MD2:
|
|
return( PSA_ALG_MD2 );
|
|
#endif
|
|
#if defined(MBEDTLS_MD4_C)
|
|
case MBEDTLS_MD_MD4:
|
|
return( PSA_ALG_MD4 );
|
|
#endif
|
|
#if defined(MBEDTLS_MD5_C)
|
|
case MBEDTLS_MD_MD5:
|
|
return( PSA_ALG_MD5 );
|
|
#endif
|
|
#if defined(MBEDTLS_SHA1_C)
|
|
case MBEDTLS_MD_SHA1:
|
|
return( PSA_ALG_SHA_1 );
|
|
#endif
|
|
#if defined(MBEDTLS_SHA256_C)
|
|
case MBEDTLS_MD_SHA224:
|
|
return( PSA_ALG_SHA_224 );
|
|
case MBEDTLS_MD_SHA256:
|
|
return( PSA_ALG_SHA_256 );
|
|
#endif
|
|
#if defined(MBEDTLS_SHA512_C)
|
|
case MBEDTLS_MD_SHA384:
|
|
return( PSA_ALG_SHA_384 );
|
|
case MBEDTLS_MD_SHA512:
|
|
return( PSA_ALG_SHA_512 );
|
|
#endif
|
|
#if defined(MBEDTLS_RIPEMD160_C)
|
|
case MBEDTLS_MD_RIPEMD160:
|
|
return( PSA_ALG_RIPEMD160 );
|
|
#endif
|
|
case MBEDTLS_MD_NONE: // Intentional fallthrough
|
|
default:
|
|
return( 0 );
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Convert a signature from an ASN.1 sequence of two integers
|
|
* to a raw {r,s} buffer. Note: upon a successful call, the caller
|
|
* takes ownership of the sig->p buffer.
|
|
*/
|
|
static int extract_ecdsa_sig( unsigned char **p, const unsigned char *end,
|
|
mbedtls_asn1_buf *sig )
|
|
{
|
|
int ret;
|
|
size_t len_signature;
|
|
size_t len_partial;
|
|
int tag_type;
|
|
if( ( end - *p ) < 1 )
|
|
{
|
|
return( MBEDTLS_ERR_X509_INVALID_SIGNATURE +
|
|
MBEDTLS_ERR_ASN1_OUT_OF_DATA );
|
|
}
|
|
tag_type = **p;
|
|
|
|
if( ( ret = mbedtls_asn1_get_tag( p, end, &len_partial,
|
|
MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
|
|
{
|
|
return( MBEDTLS_ERR_X509_INVALID_SIGNATURE + ret );
|
|
}
|
|
|
|
if( ( ret = mbedtls_asn1_get_tag( p, end, &len_partial, MBEDTLS_ASN1_INTEGER ) )
|
|
!= 0 )
|
|
return( ret );
|
|
|
|
if( **p == '\0' )
|
|
{
|
|
( *p )++;
|
|
len_partial--;
|
|
}
|
|
|
|
sig->p = mbedtls_calloc( 2, len_partial );
|
|
if( sig->p == NULL )
|
|
return( MBEDTLS_ERR_ASN1_ALLOC_FAILED );
|
|
|
|
memcpy( sig->p, *p, len_partial );
|
|
len_signature = len_partial;
|
|
( *p ) += len_partial;
|
|
if( ( ret = mbedtls_asn1_get_tag( p, end, &len_partial,
|
|
MBEDTLS_ASN1_INTEGER ) ) != 0 )
|
|
{
|
|
mbedtls_free( sig->p );
|
|
sig->p = NULL;
|
|
return( ret );
|
|
}
|
|
|
|
if( **p == '\0' )
|
|
{
|
|
( *p )++;
|
|
len_partial--;
|
|
}
|
|
|
|
memcpy( sig->p + len_partial, *p, len_partial );
|
|
len_signature += len_partial;
|
|
sig->tag = tag_type;
|
|
sig->len = len_signature;
|
|
( *p ) += len_partial;
|
|
return( 0 );
|
|
}
|
|
|
|
static psa_ecc_curve_t mbedtls_ecc_group_to_psa( mbedtls_ecp_group_id grpid )
|
|
{
|
|
switch( grpid )
|
|
{
|
|
#if defined(MBEDTLS_ECP_DP_SECP192R1_ENABLED)
|
|
case MBEDTLS_ECP_DP_SECP192R1:
|
|
return( PSA_ECC_CURVE_SECP192R1 );
|
|
#endif
|
|
#if defined(MBEDTLS_ECP_DP_SECP224R1_ENABLED)
|
|
case MBEDTLS_ECP_DP_SECP224R1:
|
|
return( PSA_ECC_CURVE_SECP224R1 );
|
|
#endif
|
|
#if defined(MBEDTLS_ECP_DP_SECP256R1_ENABLED)
|
|
case MBEDTLS_ECP_DP_SECP256R1:
|
|
return( PSA_ECC_CURVE_SECP256R1 );
|
|
#endif
|
|
#if defined(MBEDTLS_ECP_DP_SECP384R1_ENABLED)
|
|
case MBEDTLS_ECP_DP_SECP384R1:
|
|
return( PSA_ECC_CURVE_SECP384R1 );
|
|
#endif
|
|
#if defined(MBEDTLS_ECP_DP_SECP521R1_ENABLED)
|
|
case MBEDTLS_ECP_DP_SECP521R1:
|
|
return( PSA_ECC_CURVE_SECP521R1 );
|
|
#endif
|
|
#if defined(MBEDTLS_ECP_DP_BP256R1_ENABLED)
|
|
case MBEDTLS_ECP_DP_BP256R1:
|
|
return( PSA_ECC_CURVE_BRAINPOOL_P256R1 );
|
|
#endif
|
|
#if defined(MBEDTLS_ECP_DP_BP384R1_ENABLED)
|
|
case MBEDTLS_ECP_DP_BP384R1:
|
|
return( PSA_ECC_CURVE_BRAINPOOL_P384R1 );
|
|
#endif
|
|
#if defined(MBEDTLS_ECP_DP_BP512R1_ENABLED)
|
|
case MBEDTLS_ECP_DP_BP512R1:
|
|
return( PSA_ECC_CURVE_BRAINPOOL_P512R1 );
|
|
#endif
|
|
#if defined(MBEDTLS_ECP_DP_CURVE25519_ENABLED)
|
|
case MBEDTLS_ECP_DP_CURVE25519:
|
|
return( PSA_ECC_CURVE_CURVE25519 );
|
|
#endif
|
|
#if defined(MBEDTLS_ECP_DP_SECP192K1_ENABLED)
|
|
case MBEDTLS_ECP_DP_SECP192K1:
|
|
return( PSA_ECC_CURVE_SECP192K1 );
|
|
#endif
|
|
#if defined(MBEDTLS_ECP_DP_SECP224K1_ENABLED)
|
|
case MBEDTLS_ECP_DP_SECP224K1:
|
|
return( PSA_ECC_CURVE_SECP224K1 );
|
|
#endif
|
|
#if defined(MBEDTLS_ECP_DP_SECP256K1_ENABLED)
|
|
case MBEDTLS_ECP_DP_SECP256K1:
|
|
return( PSA_ECC_CURVE_SECP256K1 );
|
|
#endif
|
|
#if defined(MBEDTLS_ECP_DP_CURVE448_ENABLED)
|
|
case MBEDTLS_ECP_DP_CURVE448:
|
|
return( PSA_ECC_CURVE_CURVE448 );
|
|
#endif
|
|
default:
|
|
return( 0 );
|
|
}
|
|
}
|
|
|
|
static int ecdsa_verify_wrap( void *ctx, mbedtls_md_type_t md_alg,
|
|
const unsigned char *hash, size_t hash_len,
|
|
const unsigned char *sig, size_t sig_len )
|
|
{
|
|
int ret;
|
|
psa_key_slot_t key_slot;
|
|
psa_key_policy_t policy;
|
|
psa_key_type_t psa_type;
|
|
mbedtls_pk_context key;
|
|
mbedtls_asn1_buf signature;
|
|
int key_len;
|
|
const int buf_len = 30 + 2 * MBEDTLS_ECP_MAX_BYTES; // Equivalent of ECP_PUB_DER_MAX_BYTES
|
|
unsigned char buf[buf_len];
|
|
unsigned char *p = (unsigned char*) sig;
|
|
mbedtls_pk_info_t pk_info = mbedtls_eckey_info;
|
|
psa_algorithm_t psa_sig_md = PSA_ALG_ECDSA( translate_md_to_psa( md_alg ) );
|
|
psa_ecc_curve_t curve = mbedtls_ecc_group_to_psa ( ( (mbedtls_ecdsa_context *) ctx )->grp.id );
|
|
|
|
memset( &signature, 0, sizeof( mbedtls_asn1_buf ) );
|
|
key.pk_info = &pk_info;
|
|
key.pk_ctx = ctx;
|
|
psa_crypto_init();
|
|
|
|
psa_type = PSA_KEY_TYPE_ECC_PUBLIC_KEY( curve );
|
|
|
|
if( extract_ecdsa_sig( &p, p + sig_len, &signature ) != 0 )
|
|
return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
|
|
|
|
key_len = mbedtls_pk_write_pubkey_der( &key, buf, buf_len );
|
|
if( key_len <= 0 )
|
|
{
|
|
ret = MBEDTLS_ERR_PK_BAD_INPUT_DATA;
|
|
goto cleanup;
|
|
}
|
|
|
|
if( mbedtls_psa_get_free_key_slot( &key_slot ) != PSA_SUCCESS )
|
|
{
|
|
ret = MBEDTLS_ERR_PK_FEATURE_UNAVAILABLE;
|
|
goto cleanup;
|
|
}
|
|
psa_key_policy_init( &policy );
|
|
psa_key_policy_set_usage( &policy, PSA_KEY_USAGE_VERIFY, psa_sig_md );
|
|
if( psa_set_key_policy( key_slot, &policy ) != PSA_SUCCESS )
|
|
{
|
|
ret = MBEDTLS_ERR_PK_FEATURE_UNAVAILABLE;
|
|
goto cleanup;
|
|
}
|
|
|
|
if( psa_import_key( key_slot, psa_type, buf+buf_len-key_len, key_len )
|
|
!= PSA_SUCCESS )
|
|
{
|
|
ret = MBEDTLS_ERR_PK_BAD_INPUT_DATA;
|
|
goto cleanup;
|
|
}
|
|
|
|
if( psa_asymmetric_verify( key_slot, psa_sig_md,
|
|
hash, hash_len,
|
|
signature.p, signature.len )
|
|
!= PSA_SUCCESS )
|
|
{
|
|
psa_destroy_key( key_slot );
|
|
ret = MBEDTLS_ERR_ECP_VERIFY_FAILED;
|
|
goto cleanup;
|
|
}
|
|
ret = 0;
|
|
psa_destroy_key( key_slot );
|
|
|
|
cleanup:
|
|
mbedtls_free( signature.p );
|
|
return( ret );
|
|
}
|
|
#else /* MBEDTLS_USE_PSA_CRYPTO */
|
|
static int ecdsa_verify_wrap( void *ctx, mbedtls_md_type_t md_alg,
|
|
const unsigned char *hash, size_t hash_len,
|
|
const unsigned char *sig, size_t sig_len )
|
|
{
|
|
int ret;
|
|
((void) md_alg);
|
|
|
|
ret = mbedtls_ecdsa_read_signature( (mbedtls_ecdsa_context *) 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 */
|
|
|
|
static int ecdsa_sign_wrap( void *ctx, mbedtls_md_type_t md_alg,
|
|
const unsigned char *hash, size_t hash_len,
|
|
unsigned char *sig, size_t *sig_len,
|
|
int (*f_rng)(void *, unsigned char *, size_t), void *p_rng )
|
|
{
|
|
return( mbedtls_ecdsa_write_signature( (mbedtls_ecdsa_context *) ctx,
|
|
md_alg, hash, hash_len, sig, sig_len, f_rng, p_rng ) );
|
|
}
|
|
|
|
#if defined(MBEDTLS_ECP_RESTARTABLE)
|
|
static int ecdsa_verify_rs_wrap( void *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 )
|
|
{
|
|
int ret;
|
|
((void) md_alg);
|
|
|
|
ret = mbedtls_ecdsa_read_signature_restartable(
|
|
(mbedtls_ecdsa_context *) 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( void *ctx, mbedtls_md_type_t md_alg,
|
|
const unsigned char *hash, size_t hash_len,
|
|
unsigned char *sig, size_t *sig_len,
|
|
int (*f_rng)(void *, unsigned char *, size_t), void *p_rng,
|
|
void *rs_ctx )
|
|
{
|
|
return( mbedtls_ecdsa_write_signature_restartable(
|
|
(mbedtls_ecdsa_context *) ctx,
|
|
md_alg, hash, hash_len, sig, sig_len, f_rng, p_rng,
|
|
(mbedtls_ecdsa_restart_ctx *) rs_ctx ) );
|
|
|
|
}
|
|
#endif /* MBEDTLS_ECP_RESTARTABLE */
|
|
|
|
static void *ecdsa_alloc_wrap( void )
|
|
{
|
|
void *ctx = mbedtls_calloc( 1, sizeof( mbedtls_ecdsa_context ) );
|
|
|
|
if( ctx != NULL )
|
|
mbedtls_ecdsa_init( (mbedtls_ecdsa_context *) ctx );
|
|
|
|
return( ctx );
|
|
}
|
|
|
|
static void ecdsa_free_wrap( void *ctx )
|
|
{
|
|
mbedtls_ecdsa_free( (mbedtls_ecdsa_context *) ctx );
|
|
mbedtls_free( ctx );
|
|
}
|
|
|
|
#if defined(MBEDTLS_ECP_RESTARTABLE)
|
|
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_ECP_RESTARTABLE */
|
|
|
|
const mbedtls_pk_info_t mbedtls_ecdsa_info = {
|
|
MBEDTLS_PK_ECDSA,
|
|
"ECDSA",
|
|
eckey_get_bitlen, /* Compatible key structures */
|
|
ecdsa_can_do,
|
|
ecdsa_verify_wrap,
|
|
ecdsa_sign_wrap,
|
|
#if defined(MBEDTLS_ECP_RESTARTABLE)
|
|
ecdsa_verify_rs_wrap,
|
|
ecdsa_sign_rs_wrap,
|
|
#endif
|
|
NULL,
|
|
NULL,
|
|
eckey_check_pair, /* Compatible key structures */
|
|
ecdsa_alloc_wrap,
|
|
ecdsa_free_wrap,
|
|
#if defined(MBEDTLS_ECP_RESTARTABLE)
|
|
ecdsa_rs_alloc,
|
|
ecdsa_rs_free,
|
|
#endif
|
|
eckey_debug, /* Compatible key structures */
|
|
};
|
|
#endif /* MBEDTLS_ECDSA_C */
|
|
|
|
#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( const void *ctx )
|
|
{
|
|
const mbedtls_rsa_alt_context *rsa_alt = (const mbedtls_rsa_alt_context *) ctx;
|
|
|
|
return( 8 * rsa_alt->key_len_func( rsa_alt->key ) );
|
|
}
|
|
|
|
static int rsa_alt_sign_wrap( void *ctx, mbedtls_md_type_t md_alg,
|
|
const unsigned char *hash, size_t hash_len,
|
|
unsigned char *sig, size_t *sig_len,
|
|
int (*f_rng)(void *, unsigned char *, size_t), void *p_rng )
|
|
{
|
|
mbedtls_rsa_alt_context *rsa_alt = (mbedtls_rsa_alt_context *) ctx;
|
|
|
|
#if SIZE_MAX > UINT_MAX
|
|
if( UINT_MAX < hash_len )
|
|
return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
|
|
#endif /* SIZE_MAX > UINT_MAX */
|
|
|
|
*sig_len = rsa_alt->key_len_func( rsa_alt->key );
|
|
|
|
return( rsa_alt->sign_func( rsa_alt->key, f_rng, p_rng, MBEDTLS_RSA_PRIVATE,
|
|
md_alg, (unsigned int) hash_len, hash, sig ) );
|
|
}
|
|
|
|
static int rsa_alt_decrypt_wrap( void *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 )
|
|
{
|
|
mbedtls_rsa_alt_context *rsa_alt = (mbedtls_rsa_alt_context *) 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,
|
|
MBEDTLS_RSA_PRIVATE, olen, input, output, osize ) );
|
|
}
|
|
|
|
#if defined(MBEDTLS_RSA_C)
|
|
static int rsa_alt_check_pair( const void *pub, const void *prv )
|
|
{
|
|
unsigned char sig[MBEDTLS_MPI_MAX_SIZE];
|
|
unsigned char hash[32];
|
|
size_t sig_len = 0;
|
|
int ret;
|
|
|
|
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( (void *) prv, MBEDTLS_MD_NONE,
|
|
hash, sizeof( hash ),
|
|
sig, &sig_len, NULL, NULL ) ) != 0 )
|
|
{
|
|
return( ret );
|
|
}
|
|
|
|
if( rsa_verify_wrap( (void *) 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_platform_zeroize( ctx, sizeof( mbedtls_rsa_alt_context ) );
|
|
mbedtls_free( ctx );
|
|
}
|
|
|
|
const mbedtls_pk_info_t mbedtls_rsa_alt_info = {
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MBEDTLS_PK_RSA_ALT,
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"RSA-alt",
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|
rsa_alt_get_bitlen,
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|
rsa_alt_can_do,
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|
NULL,
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|
rsa_alt_sign_wrap,
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|
#if defined(MBEDTLS_ECDSA_C) && defined(MBEDTLS_ECP_RESTARTABLE)
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|
NULL,
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|
NULL,
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|
#endif
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|
rsa_alt_decrypt_wrap,
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|
NULL,
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|
#if defined(MBEDTLS_RSA_C)
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|
rsa_alt_check_pair,
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|
#else
|
|
NULL,
|
|
#endif
|
|
rsa_alt_alloc_wrap,
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|
rsa_alt_free_wrap,
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|
#if defined(MBEDTLS_ECDSA_C) && defined(MBEDTLS_ECP_RESTARTABLE)
|
|
NULL,
|
|
NULL,
|
|
#endif
|
|
NULL,
|
|
};
|
|
|
|
#endif /* MBEDTLS_PK_RSA_ALT_SUPPORT */
|
|
|
|
#endif /* MBEDTLS_PK_C */
|