mirror of
https://github.com/yuzu-emu/mbedtls.git
synced 2024-12-25 16:25:36 +00:00
1803 lines
52 KiB
C
1803 lines
52 KiB
C
/*
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* Public Key abstraction layer
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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.h"
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#include "mbedtls/pk_internal.h"
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#if defined(MBEDTLS_RSA_C) || defined(MBEDTLS_PK_RSA_ALT_SUPPORT)
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#include "mbedtls/rsa.h"
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#endif
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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_USE_TINYCRYPT)
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#include "tinycrypt/ecc.h"
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#include "tinycrypt/ecc_dsa.h"
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#include "mbedtls/asn1.h"
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#include "mbedtls/asn1write.h"
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#endif /* MBEDTLS_USE_TINYCRYPT */
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#include "mbedtls/platform_util.h"
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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 <string.h>
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#include <limits.h>
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#include <stdint.h>
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/* Parameter validation macros based on platform_util.h */
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#define PK_VALIDATE_RET( cond ) \
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MBEDTLS_INTERNAL_VALIDATE_RET( cond, MBEDTLS_ERR_PK_BAD_INPUT_DATA )
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#define PK_VALIDATE( cond ) \
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MBEDTLS_INTERNAL_VALIDATE( cond )
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/*
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* Internal wrappers around RSA functions
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*/
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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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/*
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* Internal wrappers around ECC functions - based on ECP module
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*/
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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)
|
|
NULL,
|
|
NULL,
|
|
#endif
|
|
eckey_debug, /* Same underlying key structure */
|
|
};
|
|
#endif /* MBEDTLS_ECP_C */
|
|
|
|
/*
|
|
* Internal wrappers around ECC functions - based on TinyCrypt
|
|
*/
|
|
#if defined(MBEDTLS_USE_TINYCRYPT)
|
|
/*
|
|
* An ASN.1 encoded signature is a sequence of two ASN.1 integers. Parse one of
|
|
* those integers and convert it to the fixed-length encoding.
|
|
*/
|
|
static int extract_ecdsa_sig_int( unsigned char **from, const unsigned char *end,
|
|
unsigned char *to, size_t to_len )
|
|
{
|
|
int ret;
|
|
size_t unpadded_len, padding_len;
|
|
|
|
if( ( ret = mbedtls_asn1_get_tag( from, end, &unpadded_len,
|
|
MBEDTLS_ASN1_INTEGER ) ) != 0 )
|
|
{
|
|
return( ret );
|
|
}
|
|
|
|
while( unpadded_len > 0 && **from == 0x00 )
|
|
{
|
|
( *from )++;
|
|
unpadded_len--;
|
|
}
|
|
|
|
if( unpadded_len > to_len || unpadded_len == 0 )
|
|
return( MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
|
|
|
|
padding_len = to_len - unpadded_len;
|
|
memset( to, 0x00, padding_len );
|
|
mbedtls_platform_memcpy( to + padding_len, *from, unpadded_len );
|
|
( *from ) += unpadded_len;
|
|
|
|
return( 0 );
|
|
}
|
|
|
|
/*
|
|
* Convert a signature from an ASN.1 sequence of two integers
|
|
* to a raw {r,s} buffer. Note: the provided sig buffer must be at least
|
|
* twice as big as int_size.
|
|
*/
|
|
static int extract_ecdsa_sig( unsigned char **p, const unsigned char *end,
|
|
unsigned char *sig, size_t int_size )
|
|
{
|
|
int ret;
|
|
size_t tmp_size;
|
|
|
|
if( ( ret = mbedtls_asn1_get_tag( p, end, &tmp_size,
|
|
MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
|
|
return( ret );
|
|
|
|
/* Extract r */
|
|
if( ( ret = extract_ecdsa_sig_int( p, end, sig, int_size ) ) != 0 )
|
|
return( ret );
|
|
/* Extract s */
|
|
if( ( ret = extract_ecdsa_sig_int( p, end, sig + int_size, int_size ) ) != 0 )
|
|
return( ret );
|
|
|
|
return( 0 );
|
|
}
|
|
|
|
static size_t uecc_eckey_get_bitlen( const void *ctx )
|
|
{
|
|
(void) ctx;
|
|
return( (size_t) ( NUM_ECC_BYTES * 8 ) );
|
|
}
|
|
|
|
static int uecc_eckey_check_pair( const void *pub, const void *prv )
|
|
{
|
|
const mbedtls_uecc_keypair *uecc_pub =
|
|
(const mbedtls_uecc_keypair *) pub;
|
|
const mbedtls_uecc_keypair *uecc_prv =
|
|
(const mbedtls_uecc_keypair *) prv;
|
|
|
|
if( mbedtls_platform_memcmp( uecc_pub->public_key,
|
|
uecc_prv->public_key,
|
|
2 * NUM_ECC_BYTES ) == 0 )
|
|
{
|
|
return( 0 );
|
|
}
|
|
|
|
return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
|
|
}
|
|
|
|
static int uecc_eckey_can_do( mbedtls_pk_type_t type )
|
|
{
|
|
return( type == MBEDTLS_PK_ECDSA ||
|
|
type == MBEDTLS_PK_ECKEY );
|
|
}
|
|
|
|
static int uecc_eckey_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;
|
|
volatile int ret_fi;
|
|
uint8_t signature[2*NUM_ECC_BYTES];
|
|
unsigned char *p;
|
|
uECC_Curve uecc_curve = uECC_secp256r1();
|
|
const mbedtls_uecc_keypair *keypair = (const mbedtls_uecc_keypair *) ctx;
|
|
|
|
((void) md_alg);
|
|
p = (unsigned char*) sig;
|
|
|
|
ret = extract_ecdsa_sig( &p, sig + sig_len, signature, NUM_ECC_BYTES );
|
|
if( ret != 0 )
|
|
return( ret );
|
|
|
|
ret_fi = uECC_verify( keypair->public_key, hash,
|
|
(unsigned) hash_len, signature, uecc_curve );
|
|
|
|
if( ret_fi == UECC_ATTACK_DETECTED )
|
|
return( MBEDTLS_ERR_PLATFORM_FAULT_DETECTED );
|
|
|
|
if( ret_fi == UECC_SUCCESS )
|
|
{
|
|
mbedtls_platform_enforce_volatile_reads();
|
|
if( ret_fi == UECC_SUCCESS )
|
|
return( 0 );
|
|
else
|
|
return( MBEDTLS_ERR_PLATFORM_FAULT_DETECTED );
|
|
}
|
|
|
|
return( MBEDTLS_ERR_PK_HW_ACCEL_FAILED );
|
|
}
|
|
|
|
/*
|
|
* Simultaneously convert and move raw MPI from the beginning of a buffer
|
|
* to an ASN.1 MPI at the end of the buffer.
|
|
* See also mbedtls_asn1_write_mpi().
|
|
*
|
|
* p: pointer to the end of the output buffer
|
|
* start: start of the output buffer, and also of the mpi to write at the end
|
|
* n_len: length of the mpi to read from start
|
|
*
|
|
* Warning:
|
|
* The total length of the output buffer must be smaller than 128 Bytes.
|
|
*/
|
|
static int asn1_write_mpibuf( unsigned char **p, unsigned char *start,
|
|
size_t n_len )
|
|
{
|
|
size_t len = 0;
|
|
|
|
if( (size_t)( *p - start ) < n_len )
|
|
return( MBEDTLS_ERR_ASN1_BUF_TOO_SMALL );
|
|
|
|
len = n_len;
|
|
*p -= len;
|
|
memmove( *p, start, len );
|
|
|
|
/* ASN.1 DER encoding requires minimal length, so skip leading 0s.
|
|
* Neither r nor s should be 0, but as a failsafe measure, still detect
|
|
* that rather than overflowing the buffer in case of an error. */
|
|
while( len > 0 && **p == 0x00 )
|
|
{
|
|
++(*p);
|
|
--len;
|
|
}
|
|
|
|
/* this is only reached if the signature was invalid */
|
|
if( len == 0 )
|
|
return( MBEDTLS_ERR_PK_HW_ACCEL_FAILED );
|
|
|
|
/* if the msb is 1, ASN.1 requires that we prepend a 0.
|
|
* Neither r nor s can be 0, so we can assume len > 0 at all times. */
|
|
if( **p & 0x80 )
|
|
{
|
|
if( *p - start < 1 )
|
|
return( MBEDTLS_ERR_ASN1_BUF_TOO_SMALL );
|
|
|
|
*--(*p) = 0x00;
|
|
len += 1;
|
|
}
|
|
|
|
/* The ASN.1 length encoding is just a single Byte containing the length,
|
|
* as we assume that the total buffer length is smaller than 128 Bytes. */
|
|
*--(*p) = len;
|
|
*--(*p) = MBEDTLS_ASN1_INTEGER;
|
|
len += 2;
|
|
|
|
return( (int) len );
|
|
}
|
|
|
|
/* Transcode signature from uECC format to ASN.1 sequence.
|
|
* See ecdsa_signature_to_asn1 in ecdsa.c, but with byte buffers instead of
|
|
* MPIs, and in-place.
|
|
*
|
|
* [in/out] sig: the signature pre- and post-transcoding
|
|
* [in/out] sig_len: signature length pre- and post-transcoding
|
|
* [int] buf_len: the available size the in/out buffer
|
|
*
|
|
* Warning: buf_len must be smaller than 128 Bytes.
|
|
*/
|
|
static int pk_ecdsa_sig_asn1_from_uecc( unsigned char *sig, size_t *sig_len,
|
|
size_t buf_len )
|
|
{
|
|
int ret;
|
|
size_t len = 0;
|
|
const size_t rs_len = *sig_len / 2;
|
|
unsigned char *p = sig + buf_len;
|
|
|
|
MBEDTLS_ASN1_CHK_ADD( len, asn1_write_mpibuf( &p, sig + rs_len, rs_len ) );
|
|
MBEDTLS_ASN1_CHK_ADD( len, asn1_write_mpibuf( &p, sig, rs_len ) );
|
|
|
|
/* The ASN.1 length encoding is just a single Byte containing the length,
|
|
* as we assume that the total buffer length is smaller than 128 Bytes. */
|
|
*--p = len;
|
|
*--p = MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE;
|
|
len += 2;
|
|
|
|
memmove( sig, p, len );
|
|
*sig_len = len;
|
|
|
|
return( 0 );
|
|
}
|
|
|
|
static int uecc_eckey_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 )
|
|
{
|
|
const mbedtls_uecc_keypair *keypair = (const mbedtls_uecc_keypair *) ctx;
|
|
uECC_Curve uecc_curve = uECC_secp256r1();
|
|
int ret;
|
|
|
|
/*
|
|
* RFC-4492 page 20:
|
|
*
|
|
* Ecdsa-Sig-Value ::= SEQUENCE {
|
|
* r INTEGER,
|
|
* s INTEGER
|
|
* }
|
|
*
|
|
* Size is at most
|
|
* 1 (tag) + 1 (len) + 1 (initial 0) + NUM_ECC_BYTES for each of r and s,
|
|
* twice that + 1 (tag) + 2 (len) for the sequence
|
|
*
|
|
* (The ASN.1 length encodings are all 1-Byte encodings because
|
|
* the total size is smaller than 128 Bytes).
|
|
*/
|
|
#define MAX_SECP256R1_ECDSA_SIG_LEN ( 3 + 2 * ( 3 + NUM_ECC_BYTES ) )
|
|
|
|
ret = uECC_sign( keypair->private_key, hash, hash_len, sig, uecc_curve );
|
|
/* TinyCrypt uses 0 to signal errors. */
|
|
if( ret == 0 )
|
|
return( MBEDTLS_ERR_PK_HW_ACCEL_FAILED );
|
|
|
|
*sig_len = 2 * NUM_ECC_BYTES;
|
|
|
|
/* uECC owns its rng function pointer */
|
|
(void) f_rng;
|
|
(void) p_rng;
|
|
(void) md_alg;
|
|
|
|
return( pk_ecdsa_sig_asn1_from_uecc( sig, sig_len,
|
|
MAX_SECP256R1_ECDSA_SIG_LEN ) );
|
|
|
|
#undef MAX_SECP256R1_ECDSA_SIG_LEN
|
|
}
|
|
|
|
#if !defined(MBEDTLS_PK_SINGLE_TYPE)
|
|
static void *uecc_eckey_alloc_wrap( void )
|
|
{
|
|
return( mbedtls_calloc( 1, sizeof( mbedtls_uecc_keypair ) ) );
|
|
}
|
|
|
|
static void uecc_eckey_free_wrap( void *ctx )
|
|
{
|
|
if( ctx == NULL )
|
|
return;
|
|
|
|
mbedtls_platform_zeroize( ctx, sizeof( mbedtls_uecc_keypair ) );
|
|
mbedtls_free( ctx );
|
|
}
|
|
#endif /* MBEDTLS_PK_SINGLE_TYPE */
|
|
|
|
#if !defined(MBEDTLS_PK_SINGLE_TYPE)
|
|
const mbedtls_pk_info_t mbedtls_uecc_eckey_info =
|
|
MBEDTLS_PK_INFO( MBEDTLS_PK_INFO_ECKEY );
|
|
#endif
|
|
#endif /* MBEDTLS_USE_TINYCRYPT */
|
|
|
|
/*
|
|
* Internal wrappers around ECDSA functions
|
|
*/
|
|
#if defined(MBEDTLS_ECDSA_C)
|
|
static int ecdsa_can_do( mbedtls_pk_type_t type )
|
|
{
|
|
return( type == MBEDTLS_PK_ECDSA );
|
|
}
|
|
|
|
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 );
|
|
}
|
|
|
|
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 */
|
|
|
|
/*
|
|
* Internal wrappers for RSA-alt support
|
|
*/
|
|
#if defined(MBEDTLS_PK_RSA_ALT_SUPPORT)
|
|
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 );
|
|
|
|
mbedtls_platform_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 )
|
|
mbedtls_platform_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 = {
|
|
MBEDTLS_PK_RSA_ALT,
|
|
"RSA-alt",
|
|
rsa_alt_get_bitlen,
|
|
rsa_alt_can_do,
|
|
NULL,
|
|
rsa_alt_sign_wrap,
|
|
#if defined(MBEDTLS_ECDSA_C) && defined(MBEDTLS_ECP_RESTARTABLE)
|
|
NULL,
|
|
NULL,
|
|
#endif
|
|
rsa_alt_decrypt_wrap,
|
|
NULL,
|
|
#if defined(MBEDTLS_RSA_C)
|
|
rsa_alt_check_pair,
|
|
#else
|
|
NULL,
|
|
#endif
|
|
rsa_alt_alloc_wrap,
|
|
rsa_alt_free_wrap,
|
|
#if defined(MBEDTLS_ECDSA_C) && defined(MBEDTLS_ECP_RESTARTABLE)
|
|
NULL,
|
|
NULL,
|
|
#endif
|
|
NULL,
|
|
};
|
|
#endif /* MBEDTLS_PK_RSA_ALT_SUPPORT */
|
|
|
|
/*
|
|
* Access to members of the pk_info structure. When a single PK type is
|
|
* hardcoded, these should have zero runtime cost; otherwise, the usual
|
|
* dynamic dispatch based on pk_info is used.
|
|
*
|
|
* For function members, don't make a getter, but a function that directly
|
|
* calls the method, so that we can entirely get rid of function pointers
|
|
* when hardcoding a single PK - some compilers optimize better that way.
|
|
*
|
|
* Not implemented for members that are only present in builds with
|
|
* MBEDTLS_ECP_RESTARTABLE for now, as the main target for this is builds
|
|
* with MBEDTLS_USE_TINYCRYPT, which don't have MBEDTLS_ECP_RESTARTABLE.
|
|
*/
|
|
#if defined(MBEDTLS_PK_SINGLE_TYPE)
|
|
|
|
MBEDTLS_ALWAYS_INLINE static inline mbedtls_pk_type_t pk_info_type(
|
|
mbedtls_pk_handle_t info )
|
|
{
|
|
(void) info;
|
|
return( MBEDTLS_PK_INFO_TYPE( MBEDTLS_PK_SINGLE_TYPE ) );
|
|
}
|
|
|
|
MBEDTLS_ALWAYS_INLINE static inline const char * pk_info_name(
|
|
mbedtls_pk_handle_t info )
|
|
{
|
|
(void) info;
|
|
return( MBEDTLS_PK_INFO_NAME( MBEDTLS_PK_SINGLE_TYPE ) );
|
|
}
|
|
|
|
MBEDTLS_ALWAYS_INLINE static inline size_t pk_info_get_bitlen(
|
|
mbedtls_pk_handle_t info, const void *ctx )
|
|
{
|
|
(void) info;
|
|
return( MBEDTLS_PK_INFO_GET_BITLEN( MBEDTLS_PK_SINGLE_TYPE )( ctx ) );
|
|
}
|
|
|
|
MBEDTLS_ALWAYS_INLINE static inline int pk_info_can_do(
|
|
mbedtls_pk_handle_t info, mbedtls_pk_type_t type )
|
|
{
|
|
(void) info;
|
|
return( MBEDTLS_PK_INFO_CAN_DO( MBEDTLS_PK_SINGLE_TYPE )( type ) );
|
|
}
|
|
|
|
MBEDTLS_ALWAYS_INLINE static inline int pk_info_verify_func(
|
|
mbedtls_pk_handle_t info, 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) info;
|
|
#if MBEDTLS_PK_INFO_VERIFY_OMIT( MBEDTLS_PK_SINGLE_TYPE )
|
|
(void) ctx;
|
|
(void) md_alg;
|
|
(void) hash;
|
|
(void) hash_len;
|
|
(void) sig;
|
|
(void) sig_len;
|
|
return( MBEDTLS_ERR_PK_TYPE_MISMATCH );
|
|
#else
|
|
return( MBEDTLS_PK_INFO_VERIFY_FUNC( MBEDTLS_PK_SINGLE_TYPE )(
|
|
ctx, md_alg, hash, hash_len, sig, sig_len ) );
|
|
#endif
|
|
}
|
|
|
|
MBEDTLS_ALWAYS_INLINE static inline int pk_info_sign_func(
|
|
mbedtls_pk_handle_t info, 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) info;
|
|
#if MBEDTLS_PK_INFO_SIGN_OMIT( MBEDTLS_PK_SINGLE_TYPE )
|
|
(void) ctx;
|
|
(void) md_alg;
|
|
(void) hash;
|
|
(void) hash_len;
|
|
(void) sig;
|
|
(void) sig_len;
|
|
(void) f_rng;
|
|
(void) p_rng;
|
|
return( MBEDTLS_ERR_PK_TYPE_MISMATCH );
|
|
#else
|
|
return( MBEDTLS_PK_INFO_SIGN_FUNC( MBEDTLS_PK_SINGLE_TYPE )(
|
|
ctx, md_alg, hash, hash_len, sig, sig_len, f_rng, p_rng ) );
|
|
#endif
|
|
}
|
|
|
|
MBEDTLS_ALWAYS_INLINE static inline int pk_info_decrypt_func(
|
|
mbedtls_pk_handle_t info, 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 )
|
|
{
|
|
(void) info;
|
|
#if MBEDTLS_PK_INFO_DECRYPT_OMIT( MBEDTLS_PK_SINGLE_TYPE )
|
|
(void) ctx;
|
|
(void) input;
|
|
(void) ilen;
|
|
(void) output;
|
|
(void) olen;
|
|
(void) osize;
|
|
(void) f_rng;
|
|
(void) p_rng;
|
|
return( MBEDTLS_ERR_PK_TYPE_MISMATCH );
|
|
#else
|
|
return( MBEDTLS_PK_INFO_DECRYPT_FUNC( MBEDTLS_PK_SINGLE_TYPE )(
|
|
ctx, input, ilen, output, olen, osize, f_rng, p_rng ) );
|
|
#endif
|
|
}
|
|
|
|
MBEDTLS_ALWAYS_INLINE static inline int pk_info_encrypt_func(
|
|
mbedtls_pk_handle_t info, 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 )
|
|
{
|
|
(void) info;
|
|
#if MBEDTLS_PK_INFO_ENCRYPT_OMIT( MBEDTLS_PK_SINGLE_TYPE )
|
|
(void) ctx;
|
|
(void) input;
|
|
(void) ilen;
|
|
(void) output;
|
|
(void) olen;
|
|
(void) osize;
|
|
(void) f_rng;
|
|
(void) p_rng;
|
|
return( MBEDTLS_ERR_PK_TYPE_MISMATCH );
|
|
#else
|
|
return( MBEDTLS_PK_INFO_ENCRYPT_FUNC( MBEDTLS_PK_SINGLE_TYPE )(
|
|
ctx, input, ilen, output, olen, osize, f_rng, p_rng ) );
|
|
#endif
|
|
}
|
|
|
|
MBEDTLS_ALWAYS_INLINE static inline int pk_info_check_pair_func(
|
|
mbedtls_pk_handle_t info, const void *pub, const void *prv )
|
|
{
|
|
(void) info;
|
|
#if MBEDTLS_PK_INFO_CHECK_PAIR_OMIT( MBEDTLS_PK_SINGLE_TYPE )
|
|
(void) pub;
|
|
(void) prv;
|
|
return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
|
|
#else
|
|
return( MBEDTLS_PK_INFO_CHECK_PAIR_FUNC( MBEDTLS_PK_SINGLE_TYPE )(
|
|
pub, prv ) );
|
|
#endif
|
|
}
|
|
|
|
MBEDTLS_ALWAYS_INLINE static inline int pk_info_debug_func(
|
|
mbedtls_pk_handle_t info,
|
|
const void *ctx, mbedtls_pk_debug_item *items )
|
|
{
|
|
(void) info;
|
|
#if MBEDTLS_PK_INFO_DEBUG_OMIT( MBEDTLS_PK_SINGLE_TYPE )
|
|
(void) ctx;
|
|
(void) items;
|
|
return( MBEDTLS_ERR_PK_TYPE_MISMATCH );
|
|
#else
|
|
return( MBEDTLS_PK_INFO_DEBUG_FUNC( MBEDTLS_PK_SINGLE_TYPE )( ctx, items ) );
|
|
#endif
|
|
}
|
|
|
|
#else /* MBEDTLS_PK_SINGLE_TYPE */
|
|
|
|
MBEDTLS_ALWAYS_INLINE static inline mbedtls_pk_type_t pk_info_type(
|
|
mbedtls_pk_handle_t info )
|
|
{
|
|
return( info->type );
|
|
}
|
|
|
|
MBEDTLS_ALWAYS_INLINE static inline const char * pk_info_name(
|
|
mbedtls_pk_handle_t info )
|
|
{
|
|
return( info->name );
|
|
}
|
|
|
|
MBEDTLS_ALWAYS_INLINE static inline size_t pk_info_get_bitlen(
|
|
mbedtls_pk_handle_t info, const void *ctx )
|
|
{
|
|
return( info->get_bitlen( ctx ) );
|
|
}
|
|
|
|
MBEDTLS_ALWAYS_INLINE static inline int pk_info_can_do(
|
|
mbedtls_pk_handle_t info, mbedtls_pk_type_t type )
|
|
{
|
|
return( info->can_do( type ) );
|
|
}
|
|
|
|
MBEDTLS_ALWAYS_INLINE static inline int pk_info_verify_func(
|
|
mbedtls_pk_handle_t info, void *ctx, mbedtls_md_type_t md_alg,
|
|
const unsigned char *hash, size_t hash_len,
|
|
const unsigned char *sig, size_t sig_len )
|
|
{
|
|
if( info->verify_func == NULL )
|
|
return( MBEDTLS_ERR_PK_TYPE_MISMATCH );
|
|
|
|
return( info->verify_func( ctx, md_alg, hash, hash_len, sig, sig_len ) );
|
|
}
|
|
|
|
MBEDTLS_ALWAYS_INLINE static inline int pk_info_sign_func(
|
|
mbedtls_pk_handle_t info, 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 )
|
|
{
|
|
if( info->sign_func == NULL )
|
|
return( MBEDTLS_ERR_PK_TYPE_MISMATCH );
|
|
|
|
return( info->sign_func( ctx, md_alg, hash, hash_len, sig, sig_len,
|
|
f_rng, p_rng ) );
|
|
}
|
|
|
|
MBEDTLS_ALWAYS_INLINE static inline int pk_info_decrypt_func(
|
|
mbedtls_pk_handle_t info, 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 )
|
|
{
|
|
if( info->decrypt_func == NULL )
|
|
return( MBEDTLS_ERR_PK_TYPE_MISMATCH );
|
|
|
|
return( info->decrypt_func( ctx, input, ilen, output, olen, osize,
|
|
f_rng, p_rng ) );
|
|
}
|
|
|
|
MBEDTLS_ALWAYS_INLINE static inline int pk_info_encrypt_func(
|
|
mbedtls_pk_handle_t info, 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 )
|
|
{
|
|
if( info->encrypt_func == NULL )
|
|
return( MBEDTLS_ERR_PK_TYPE_MISMATCH );
|
|
|
|
return( info->encrypt_func( ctx, input, ilen, output, olen, osize,
|
|
f_rng, p_rng ) );
|
|
}
|
|
|
|
MBEDTLS_ALWAYS_INLINE static inline int pk_info_check_pair_func(
|
|
mbedtls_pk_handle_t info, const void *pub, const void *prv )
|
|
{
|
|
if( info->check_pair_func == NULL )
|
|
return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
|
|
|
|
return( info->check_pair_func( pub, prv ) );
|
|
}
|
|
|
|
MBEDTLS_ALWAYS_INLINE static inline void *pk_info_ctx_alloc_func(
|
|
mbedtls_pk_handle_t info )
|
|
{
|
|
return( info->ctx_alloc_func( ) );
|
|
}
|
|
|
|
MBEDTLS_ALWAYS_INLINE static inline void pk_info_ctx_free_func(
|
|
mbedtls_pk_handle_t info, void *ctx )
|
|
{
|
|
info->ctx_free_func( ctx );
|
|
}
|
|
|
|
MBEDTLS_ALWAYS_INLINE static inline int pk_info_debug_func(
|
|
mbedtls_pk_handle_t info,
|
|
const void *ctx, mbedtls_pk_debug_item *items )
|
|
{
|
|
if( info->debug_func == NULL )
|
|
return( MBEDTLS_ERR_PK_TYPE_MISMATCH );
|
|
|
|
info->debug_func( ctx, items );
|
|
return( 0 );
|
|
}
|
|
|
|
#endif /* MBEDTLS_PK_SINGLE_TYPE */
|
|
|
|
/*
|
|
* Initialise a mbedtls_pk_context
|
|
*/
|
|
void mbedtls_pk_init( mbedtls_pk_context *ctx )
|
|
{
|
|
PK_VALIDATE( ctx != NULL );
|
|
|
|
#if !defined(MBEDTLS_PK_SINGLE_TYPE)
|
|
ctx->pk_info = MBEDTLS_PK_INVALID_HANDLE;
|
|
ctx->pk_ctx = NULL;
|
|
#else
|
|
memset( ctx, 0, sizeof( mbedtls_pk_context ) );
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* Free (the components of) a mbedtls_pk_context
|
|
*/
|
|
void mbedtls_pk_free( mbedtls_pk_context *ctx )
|
|
{
|
|
if( ctx == NULL )
|
|
return;
|
|
|
|
#if !defined(MBEDTLS_PK_SINGLE_TYPE)
|
|
if( MBEDTLS_PK_CTX_IS_VALID( ctx ) )
|
|
pk_info_ctx_free_func( MBEDTLS_PK_CTX_INFO( ctx ), ctx->pk_ctx );
|
|
#endif
|
|
|
|
mbedtls_platform_zeroize( ctx, sizeof( mbedtls_pk_context ) );
|
|
}
|
|
|
|
#if defined(MBEDTLS_ECDSA_C) && defined(MBEDTLS_ECP_RESTARTABLE)
|
|
/*
|
|
* Initialize a restart context
|
|
*/
|
|
void mbedtls_pk_restart_init( mbedtls_pk_restart_ctx *ctx )
|
|
{
|
|
PK_VALIDATE( ctx != NULL );
|
|
ctx->pk_info = NULL;
|
|
ctx->rs_ctx = NULL;
|
|
}
|
|
|
|
/*
|
|
* Free the components of a restart context
|
|
*/
|
|
void mbedtls_pk_restart_free( mbedtls_pk_restart_ctx *ctx )
|
|
{
|
|
if( ctx == NULL || !MBEDTLS_PK_CTX_IS_VALID( ctx ) ||
|
|
ctx->pk_info->rs_free_func == NULL )
|
|
{
|
|
return;
|
|
}
|
|
|
|
ctx->pk_info->rs_free_func( ctx->rs_ctx );
|
|
|
|
ctx->pk_info = MBEDTLS_PK_INVALID_HANDLE;
|
|
ctx->rs_ctx = NULL;
|
|
}
|
|
#endif /* MBEDTLS_ECDSA_C && MBEDTLS_ECP_RESTARTABLE */
|
|
|
|
/*
|
|
* Get pk_info structure from type
|
|
*/
|
|
mbedtls_pk_handle_t mbedtls_pk_info_from_type( mbedtls_pk_type_t pk_type )
|
|
{
|
|
#if defined(MBEDTLS_PK_SINGLE_TYPE)
|
|
if( pk_type == MBEDTLS_PK_INFO_TYPE( MBEDTLS_PK_SINGLE_TYPE ) )
|
|
return( MBEDTLS_PK_UNIQUE_VALID_HANDLE );
|
|
|
|
return( MBEDTLS_PK_INVALID_HANDLE );
|
|
|
|
#else /* MBEDTLS_PK_SINGLE_TYPE */
|
|
|
|
switch( pk_type ) {
|
|
#if defined(MBEDTLS_RSA_C)
|
|
case MBEDTLS_PK_RSA:
|
|
return( &mbedtls_rsa_info );
|
|
#endif
|
|
#if defined(MBEDTLS_ECP_C)
|
|
case MBEDTLS_PK_ECKEY_DH:
|
|
return( &mbedtls_eckeydh_info );
|
|
#endif
|
|
#if defined(MBEDTLS_ECDSA_C)
|
|
case MBEDTLS_PK_ECDSA:
|
|
return( &mbedtls_ecdsa_info );
|
|
#endif
|
|
#if defined(MBEDTLS_USE_TINYCRYPT)
|
|
case MBEDTLS_PK_ECKEY:
|
|
return( &mbedtls_uecc_eckey_info );
|
|
#else /* MBEDTLS_USE_TINYCRYPT */
|
|
#if defined(MBEDTLS_ECP_C)
|
|
case MBEDTLS_PK_ECKEY:
|
|
return( &mbedtls_eckey_info );
|
|
#endif
|
|
#endif /* MBEDTLS_USE_TINYCRYPT */
|
|
/* MBEDTLS_PK_RSA_ALT omitted on purpose */
|
|
default:
|
|
return( NULL );
|
|
}
|
|
#endif /* MBEDTLS_PK_SINGLE_TYPE */
|
|
}
|
|
|
|
/*
|
|
* Initialise context
|
|
*/
|
|
int mbedtls_pk_setup( mbedtls_pk_context *ctx, mbedtls_pk_handle_t info )
|
|
{
|
|
PK_VALIDATE_RET( ctx != NULL );
|
|
if( info == MBEDTLS_PK_INVALID_HANDLE )
|
|
return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
|
|
|
|
#if !defined(MBEDTLS_PK_SINGLE_TYPE)
|
|
if( ctx->pk_info != NULL )
|
|
return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
|
|
|
|
ctx->pk_info = info;
|
|
|
|
if( ( ctx->pk_ctx = pk_info_ctx_alloc_func( info ) ) == NULL )
|
|
return( MBEDTLS_ERR_PK_ALLOC_FAILED );
|
|
#else
|
|
(void) ctx;
|
|
#endif
|
|
|
|
return( 0 );
|
|
}
|
|
|
|
#if defined(MBEDTLS_PK_RSA_ALT_SUPPORT)
|
|
/*
|
|
* Initialize an RSA-alt context
|
|
*/
|
|
int mbedtls_pk_setup_rsa_alt( mbedtls_pk_context *ctx, void * key,
|
|
mbedtls_pk_rsa_alt_decrypt_func decrypt_func,
|
|
mbedtls_pk_rsa_alt_sign_func sign_func,
|
|
mbedtls_pk_rsa_alt_key_len_func key_len_func )
|
|
{
|
|
mbedtls_rsa_alt_context *rsa_alt;
|
|
mbedtls_pk_handle_t info = &mbedtls_rsa_alt_info;
|
|
|
|
PK_VALIDATE_RET( ctx != NULL );
|
|
if( MBEDTLS_PK_CTX_IS_VALID( ctx ) )
|
|
return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
|
|
|
|
if( ( ctx->pk_ctx = info->ctx_alloc_func() ) == NULL )
|
|
return( MBEDTLS_ERR_PK_ALLOC_FAILED );
|
|
|
|
ctx->pk_info = info;
|
|
|
|
rsa_alt = (mbedtls_rsa_alt_context *) ctx->pk_ctx;
|
|
|
|
rsa_alt->key = key;
|
|
rsa_alt->decrypt_func = decrypt_func;
|
|
rsa_alt->sign_func = sign_func;
|
|
rsa_alt->key_len_func = key_len_func;
|
|
|
|
return( 0 );
|
|
}
|
|
#endif /* MBEDTLS_PK_RSA_ALT_SUPPORT */
|
|
|
|
/*
|
|
* Tell if a PK can do the operations of the given type
|
|
*/
|
|
int mbedtls_pk_can_do( const mbedtls_pk_context *ctx, mbedtls_pk_type_t type )
|
|
{
|
|
/* A context with null pk_info is not set up yet and can't do anything.
|
|
* For backward compatibility, also accept NULL instead of a context
|
|
* pointer. */
|
|
if( ctx == NULL || !MBEDTLS_PK_CTX_IS_VALID( ctx ) )
|
|
return( 0 );
|
|
|
|
return( pk_info_can_do( MBEDTLS_PK_CTX_INFO( ctx ), type ) );
|
|
}
|
|
|
|
/*
|
|
* Helper for mbedtls_pk_sign and mbedtls_pk_verify
|
|
*/
|
|
static inline int pk_hashlen_helper( mbedtls_md_type_t md_alg, size_t *hash_len )
|
|
{
|
|
mbedtls_md_handle_t md_info;
|
|
|
|
if( *hash_len != 0 )
|
|
return( 0 );
|
|
|
|
if( ( md_info = mbedtls_md_info_from_type( md_alg ) ) ==
|
|
MBEDTLS_MD_INVALID_HANDLE )
|
|
{
|
|
return( -1 );
|
|
}
|
|
|
|
*hash_len = mbedtls_md_get_size( md_info );
|
|
return( 0 );
|
|
}
|
|
|
|
#if defined(MBEDTLS_ECDSA_C) && defined(MBEDTLS_ECP_RESTARTABLE)
|
|
/*
|
|
* Helper to set up a restart context if needed
|
|
*/
|
|
static int pk_restart_setup( mbedtls_pk_restart_ctx *ctx,
|
|
mbedtls_pk_handle_t info )
|
|
{
|
|
/* Don't do anything if already set up or invalid */
|
|
if( ctx == NULL || MBEDTLS_PK_CTX_IS_VALID( ctx ) )
|
|
return( 0 );
|
|
|
|
/* Should never happen when we're called */
|
|
if( info->rs_alloc_func == NULL || info->rs_free_func == NULL )
|
|
return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
|
|
|
|
if( ( ctx->rs_ctx = info->rs_alloc_func() ) == NULL )
|
|
return( MBEDTLS_ERR_PK_ALLOC_FAILED );
|
|
|
|
ctx->pk_info = info;
|
|
|
|
return( 0 );
|
|
}
|
|
#endif /* MBEDTLS_ECDSA_C && MBEDTLS_ECP_RESTARTABLE */
|
|
|
|
/*
|
|
* Verify a signature (restartable)
|
|
*/
|
|
int mbedtls_pk_verify_restartable( mbedtls_pk_context *ctx,
|
|
mbedtls_md_type_t md_alg,
|
|
const unsigned char *hash, size_t hash_len,
|
|
const unsigned char *sig, size_t sig_len,
|
|
mbedtls_pk_restart_ctx *rs_ctx )
|
|
{
|
|
PK_VALIDATE_RET( ctx != NULL );
|
|
PK_VALIDATE_RET( ( md_alg == MBEDTLS_MD_NONE && hash_len == 0 ) ||
|
|
hash != NULL );
|
|
PK_VALIDATE_RET( sig != NULL );
|
|
|
|
if( !MBEDTLS_PK_CTX_IS_VALID( ctx ) ||
|
|
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->verify_rs_func != NULL )
|
|
{
|
|
int ret;
|
|
|
|
if( ( ret = pk_restart_setup( rs_ctx, ctx->pk_info ) ) != 0 )
|
|
return( ret );
|
|
|
|
ret = ctx->pk_info->verify_rs_func( ctx->pk_ctx,
|
|
md_alg, hash, hash_len, sig, sig_len, 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 */
|
|
|
|
return( pk_info_verify_func( MBEDTLS_PK_CTX_INFO( ctx ),
|
|
ctx->pk_ctx, md_alg, hash, hash_len, sig, sig_len ) );
|
|
}
|
|
|
|
/*
|
|
* Verify a signature
|
|
*/
|
|
int mbedtls_pk_verify( mbedtls_pk_context *ctx, mbedtls_md_type_t md_alg,
|
|
const unsigned char *hash, size_t hash_len,
|
|
const unsigned char *sig, size_t sig_len )
|
|
{
|
|
return( mbedtls_pk_verify_restartable( ctx, md_alg, hash, hash_len,
|
|
sig, sig_len, NULL ) );
|
|
}
|
|
|
|
/*
|
|
* Verify a signature with options
|
|
*/
|
|
int mbedtls_pk_verify_ext( mbedtls_pk_type_t type, const void *options,
|
|
mbedtls_pk_context *ctx, mbedtls_md_type_t md_alg,
|
|
const unsigned char *hash, size_t hash_len,
|
|
const unsigned char *sig, size_t sig_len )
|
|
{
|
|
PK_VALIDATE_RET( ctx != NULL );
|
|
PK_VALIDATE_RET( ( md_alg == MBEDTLS_MD_NONE && hash_len == 0 ) ||
|
|
hash != NULL );
|
|
PK_VALIDATE_RET( sig != NULL );
|
|
|
|
if( !MBEDTLS_PK_CTX_IS_VALID( ctx ) )
|
|
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 )
|
|
{
|
|
#if defined(MBEDTLS_RSA_C) && defined(MBEDTLS_PKCS1_V21)
|
|
int ret;
|
|
const mbedtls_pk_rsassa_pss_options *pss_opts;
|
|
|
|
#if SIZE_MAX > UINT_MAX
|
|
if( md_alg == MBEDTLS_MD_NONE && UINT_MAX < hash_len )
|
|
return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
|
|
#endif /* SIZE_MAX > UINT_MAX */
|
|
|
|
if( options == NULL )
|
|
return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
|
|
|
|
pss_opts = (const mbedtls_pk_rsassa_pss_options *) options;
|
|
|
|
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 ),
|
|
NULL, NULL, MBEDTLS_RSA_PUBLIC,
|
|
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 */
|
|
}
|
|
|
|
/* 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 ) );
|
|
}
|
|
|
|
/*
|
|
* 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_len,
|
|
int (*f_rng)(void *, unsigned char *, size_t), void *p_rng,
|
|
mbedtls_pk_restart_ctx *rs_ctx )
|
|
{
|
|
PK_VALIDATE_RET( ctx != NULL );
|
|
PK_VALIDATE_RET( ( md_alg == MBEDTLS_MD_NONE && hash_len == 0 ) ||
|
|
hash != NULL );
|
|
PK_VALIDATE_RET( sig != NULL );
|
|
|
|
if( !MBEDTLS_PK_CTX_IS_VALID( ctx ) ||
|
|
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;
|
|
|
|
if( ( ret = pk_restart_setup( rs_ctx, ctx->pk_info ) ) != 0 )
|
|
return( ret );
|
|
|
|
ret = ctx->pk_info->sign_rs_func( ctx->pk_ctx, md_alg,
|
|
hash, hash_len, sig, 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 */
|
|
|
|
return( pk_info_sign_func( MBEDTLS_PK_CTX_INFO( ctx ), ctx->pk_ctx,
|
|
md_alg, hash, hash_len, sig, 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_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_len, f_rng, p_rng, NULL ) );
|
|
}
|
|
|
|
/*
|
|
* 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 )
|
|
{
|
|
PK_VALIDATE_RET( ctx != NULL );
|
|
PK_VALIDATE_RET( input != NULL || ilen == 0 );
|
|
PK_VALIDATE_RET( output != NULL || osize == 0 );
|
|
PK_VALIDATE_RET( olen != NULL );
|
|
|
|
if( !MBEDTLS_PK_CTX_IS_VALID( ctx ) )
|
|
return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
|
|
|
|
return( pk_info_decrypt_func( MBEDTLS_PK_CTX_INFO( ctx ), ctx->pk_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 )
|
|
{
|
|
PK_VALIDATE_RET( ctx != NULL );
|
|
PK_VALIDATE_RET( input != NULL || ilen == 0 );
|
|
PK_VALIDATE_RET( output != NULL || osize == 0 );
|
|
PK_VALIDATE_RET( olen != NULL );
|
|
|
|
if( !MBEDTLS_PK_CTX_IS_VALID( ctx ) )
|
|
return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
|
|
|
|
return( pk_info_encrypt_func( MBEDTLS_PK_CTX_INFO( ctx ), ctx->pk_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 )
|
|
{
|
|
PK_VALIDATE_RET( pub != NULL );
|
|
PK_VALIDATE_RET( prv != NULL );
|
|
|
|
if( !MBEDTLS_PK_CTX_IS_VALID( pub ) || !MBEDTLS_PK_CTX_IS_VALID( prv ) )
|
|
return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
|
|
|
|
#if defined(MBEDTLS_PK_RSA_ALT_SUPPORT)
|
|
if( pk_info_type( prv->pk_info ) == MBEDTLS_PK_RSA_ALT )
|
|
{
|
|
if( pk_info_type( pub->pk_info ) != MBEDTLS_PK_RSA )
|
|
return( MBEDTLS_ERR_PK_TYPE_MISMATCH );
|
|
}
|
|
else
|
|
#endif /* MBEDTLS_PK_RSA_ALT_SUPPORT */
|
|
{
|
|
if( MBEDTLS_PK_CTX_INFO( pub ) != MBEDTLS_PK_CTX_INFO( prv ) )
|
|
return( MBEDTLS_ERR_PK_TYPE_MISMATCH );
|
|
}
|
|
|
|
return( pk_info_check_pair_func( MBEDTLS_PK_CTX_INFO( prv ),
|
|
pub->pk_ctx, prv->pk_ctx ) );
|
|
}
|
|
|
|
/*
|
|
* 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 || !MBEDTLS_PK_CTX_IS_VALID( ctx ) )
|
|
return( 0 );
|
|
|
|
return( pk_info_get_bitlen( MBEDTLS_PK_CTX_INFO( ctx ), ctx->pk_ctx ) );
|
|
}
|
|
|
|
/*
|
|
* Export debug information
|
|
*/
|
|
int mbedtls_pk_debug( const mbedtls_pk_context *ctx, mbedtls_pk_debug_item *items )
|
|
{
|
|
PK_VALIDATE_RET( ctx != NULL );
|
|
if( !MBEDTLS_PK_CTX_IS_VALID( ctx ) )
|
|
return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
|
|
|
|
return( pk_info_debug_func( MBEDTLS_PK_CTX_INFO( ctx ), ctx->pk_ctx, items ) );
|
|
}
|
|
|
|
/*
|
|
* Access the PK type name
|
|
*/
|
|
const char *mbedtls_pk_get_name( const mbedtls_pk_context *ctx )
|
|
{
|
|
if( ctx == NULL || !MBEDTLS_PK_CTX_IS_VALID( ctx ) )
|
|
return( "invalid PK" );
|
|
|
|
return( pk_info_name( MBEDTLS_PK_CTX_INFO( ctx ) ) );
|
|
}
|
|
|
|
/*
|
|
* Access the PK type
|
|
*/
|
|
mbedtls_pk_type_t mbedtls_pk_get_type( const mbedtls_pk_context *ctx )
|
|
{
|
|
if( ctx == NULL || !MBEDTLS_PK_CTX_IS_VALID( ctx ) )
|
|
return( MBEDTLS_PK_NONE );
|
|
|
|
return( pk_info_type( MBEDTLS_PK_CTX_INFO( ctx ) ) );
|
|
}
|
|
|
|
#endif /* MBEDTLS_PK_C */
|