[398] | 1 | /*
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| 2 | * Public Key abstraction layer: wrapper functions
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| 3 | *
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| 4 | * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
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| 5 | * SPDX-License-Identifier: Apache-2.0
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| 6 | *
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| 7 | * Licensed under the Apache License, Version 2.0 (the "License"); you may
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| 8 | * not use this file except in compliance with the License.
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| 9 | * You may obtain a copy of the License at
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| 10 | *
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| 11 | * http://www.apache.org/licenses/LICENSE-2.0
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| 12 | *
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| 13 | * Unless required by applicable law or agreed to in writing, software
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| 14 | * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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| 15 | * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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| 16 | * See the License for the specific language governing permissions and
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| 17 | * limitations under the License.
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| 18 | *
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| 19 | * This file is part of mbed TLS (https://tls.mbed.org)
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| 20 | */
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| 21 |
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| 22 | #if !defined(MBEDTLS_CONFIG_FILE)
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| 23 | #include "mbedtls/config.h"
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| 24 | #else
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| 25 | #include MBEDTLS_CONFIG_FILE
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| 26 | #endif
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| 27 |
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| 28 | #if defined(MBEDTLS_PK_C)
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| 29 | #include "mbedtls/pk_internal.h"
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| 30 |
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| 31 | /* Even if RSA not activated, for the sake of RSA-alt */
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| 32 | #include "mbedtls/rsa.h"
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| 33 |
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| 34 | #include <string.h>
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| 35 |
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| 36 | #if defined(MBEDTLS_ECP_C)
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| 37 | #include "mbedtls/ecp.h"
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| 38 | #endif
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| 39 |
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| 40 | #if defined(MBEDTLS_ECDSA_C)
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| 41 | #include "mbedtls/ecdsa.h"
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| 42 | #endif
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| 43 |
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| 44 | #if defined(MBEDTLS_PK_RSA_ALT_SUPPORT)
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| 45 | #include "mbedtls/platform_util.h"
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| 46 | #endif
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| 47 |
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| 48 | #if defined(MBEDTLS_PLATFORM_C)
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| 49 | #include "mbedtls/platform.h"
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| 50 | #else
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| 51 | #include <stdlib.h>
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| 52 | #define mbedtls_calloc calloc
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| 53 | #define mbedtls_free free
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| 54 | #endif
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| 55 |
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| 56 | #include <limits.h>
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| 57 | #include <stdint.h>
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| 58 |
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| 59 | #if defined(MBEDTLS_RSA_C)
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| 60 | static int rsa_can_do( mbedtls_pk_type_t type )
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| 61 | {
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| 62 | return( type == MBEDTLS_PK_RSA ||
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| 63 | type == MBEDTLS_PK_RSASSA_PSS );
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| 64 | }
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| 65 |
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| 66 | static size_t rsa_get_bitlen( const void *ctx )
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| 67 | {
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| 68 | const mbedtls_rsa_context * rsa = (const mbedtls_rsa_context *) ctx;
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| 69 | return( 8 * mbedtls_rsa_get_len( rsa ) );
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| 70 | }
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| 71 |
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| 72 | static int rsa_verify_wrap( void *ctx, mbedtls_md_type_t md_alg,
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| 73 | const unsigned char *hash, size_t hash_len,
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| 74 | const unsigned char *sig, size_t sig_len )
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| 75 | {
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| 76 | int ret;
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| 77 | mbedtls_rsa_context * rsa = (mbedtls_rsa_context *) ctx;
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| 78 | size_t rsa_len = mbedtls_rsa_get_len( rsa );
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| 79 |
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| 80 | #if SIZE_MAX > UINT_MAX
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| 81 | if( md_alg == MBEDTLS_MD_NONE && UINT_MAX < hash_len )
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| 82 | return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
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| 83 | #endif /* SIZE_MAX > UINT_MAX */
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| 84 |
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| 85 | if( sig_len < rsa_len )
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| 86 | return( MBEDTLS_ERR_RSA_VERIFY_FAILED );
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| 87 |
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| 88 | if( ( ret = mbedtls_rsa_pkcs1_verify( rsa, NULL, NULL,
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| 89 | MBEDTLS_RSA_PUBLIC, md_alg,
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| 90 | (unsigned int) hash_len, hash, sig ) ) != 0 )
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| 91 | return( ret );
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| 92 |
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| 93 | /* The buffer contains a valid signature followed by extra data.
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| 94 | * We have a special error code for that so that so that callers can
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| 95 | * use mbedtls_pk_verify() to check "Does the buffer start with a
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| 96 | * valid signature?" and not just "Does the buffer contain a valid
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| 97 | * signature?". */
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| 98 | if( sig_len > rsa_len )
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| 99 | return( MBEDTLS_ERR_PK_SIG_LEN_MISMATCH );
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| 100 |
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| 101 | return( 0 );
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| 102 | }
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| 103 |
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| 104 | static int rsa_sign_wrap( void *ctx, mbedtls_md_type_t md_alg,
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| 105 | const unsigned char *hash, size_t hash_len,
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| 106 | unsigned char *sig, size_t *sig_len,
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| 107 | int (*f_rng)(void *, unsigned char *, size_t), void *p_rng )
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| 108 | {
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| 109 | mbedtls_rsa_context * rsa = (mbedtls_rsa_context *) ctx;
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| 110 |
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| 111 | #if SIZE_MAX > UINT_MAX
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| 112 | if( md_alg == MBEDTLS_MD_NONE && UINT_MAX < hash_len )
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| 113 | return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
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| 114 | #endif /* SIZE_MAX > UINT_MAX */
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| 115 |
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| 116 | *sig_len = mbedtls_rsa_get_len( rsa );
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| 117 |
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| 118 | return( mbedtls_rsa_pkcs1_sign( rsa, f_rng, p_rng, MBEDTLS_RSA_PRIVATE,
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| 119 | md_alg, (unsigned int) hash_len, hash, sig ) );
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| 120 | }
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| 121 |
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| 122 | static int rsa_decrypt_wrap( void *ctx,
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| 123 | const unsigned char *input, size_t ilen,
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| 124 | unsigned char *output, size_t *olen, size_t osize,
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| 125 | int (*f_rng)(void *, unsigned char *, size_t), void *p_rng )
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| 126 | {
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| 127 | mbedtls_rsa_context * rsa = (mbedtls_rsa_context *) ctx;
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| 128 |
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| 129 | if( ilen != mbedtls_rsa_get_len( rsa ) )
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| 130 | return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
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| 131 |
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| 132 | return( mbedtls_rsa_pkcs1_decrypt( rsa, f_rng, p_rng,
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| 133 | MBEDTLS_RSA_PRIVATE, olen, input, output, osize ) );
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| 134 | }
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| 135 |
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| 136 | static int rsa_encrypt_wrap( void *ctx,
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| 137 | const unsigned char *input, size_t ilen,
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| 138 | unsigned char *output, size_t *olen, size_t osize,
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| 139 | int (*f_rng)(void *, unsigned char *, size_t), void *p_rng )
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| 140 | {
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| 141 | mbedtls_rsa_context * rsa = (mbedtls_rsa_context *) ctx;
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| 142 | *olen = mbedtls_rsa_get_len( rsa );
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| 143 |
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| 144 | if( *olen > osize )
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| 145 | return( MBEDTLS_ERR_RSA_OUTPUT_TOO_LARGE );
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| 146 |
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| 147 | return( mbedtls_rsa_pkcs1_encrypt( rsa, f_rng, p_rng, MBEDTLS_RSA_PUBLIC,
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| 148 | ilen, input, output ) );
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| 149 | }
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| 150 |
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| 151 | static int rsa_check_pair_wrap( const void *pub, const void *prv )
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| 152 | {
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| 153 | return( mbedtls_rsa_check_pub_priv( (const mbedtls_rsa_context *) pub,
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| 154 | (const mbedtls_rsa_context *) prv ) );
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| 155 | }
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| 156 |
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| 157 | static void *rsa_alloc_wrap( void )
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| 158 | {
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| 159 | void *ctx = mbedtls_calloc( 1, sizeof( mbedtls_rsa_context ) );
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| 160 |
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| 161 | if( ctx != NULL )
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| 162 | mbedtls_rsa_init( (mbedtls_rsa_context *) ctx, 0, 0 );
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| 163 |
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| 164 | return( ctx );
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| 165 | }
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| 166 |
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| 167 | static void rsa_free_wrap( void *ctx )
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| 168 | {
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| 169 | mbedtls_rsa_free( (mbedtls_rsa_context *) ctx );
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| 170 | mbedtls_free( ctx );
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| 171 | }
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| 172 |
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| 173 | static void rsa_debug( const void *ctx, mbedtls_pk_debug_item *items )
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| 174 | {
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| 175 | items->type = MBEDTLS_PK_DEBUG_MPI;
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| 176 | items->name = "rsa.N";
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| 177 | items->value = &( ((mbedtls_rsa_context *) ctx)->N );
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| 178 |
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| 179 | items++;
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| 180 |
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| 181 | items->type = MBEDTLS_PK_DEBUG_MPI;
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| 182 | items->name = "rsa.E";
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| 183 | items->value = &( ((mbedtls_rsa_context *) ctx)->E );
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| 184 | }
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| 185 |
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| 186 | const mbedtls_pk_info_t mbedtls_rsa_info = {
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| 187 | MBEDTLS_PK_RSA,
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| 188 | "RSA",
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| 189 | rsa_get_bitlen,
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| 190 | rsa_can_do,
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| 191 | rsa_verify_wrap,
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| 192 | rsa_sign_wrap,
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| 193 | #if defined(MBEDTLS_ECDSA_C) && defined(MBEDTLS_ECP_RESTARTABLE)
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| 194 | NULL,
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| 195 | NULL,
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| 196 | #endif
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| 197 | rsa_decrypt_wrap,
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| 198 | rsa_encrypt_wrap,
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| 199 | rsa_check_pair_wrap,
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| 200 | rsa_alloc_wrap,
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| 201 | rsa_free_wrap,
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| 202 | #if defined(MBEDTLS_ECDSA_C) && defined(MBEDTLS_ECP_RESTARTABLE)
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| 203 | NULL,
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| 204 | NULL,
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| 205 | #endif
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| 206 | rsa_debug,
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| 207 | };
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| 208 | #endif /* MBEDTLS_RSA_C */
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| 209 |
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| 210 | #if defined(MBEDTLS_ECP_C)
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| 211 | /*
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| 212 | * Generic EC key
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| 213 | */
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| 214 | static int eckey_can_do( mbedtls_pk_type_t type )
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| 215 | {
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| 216 | return( type == MBEDTLS_PK_ECKEY ||
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| 217 | type == MBEDTLS_PK_ECKEY_DH ||
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| 218 | type == MBEDTLS_PK_ECDSA );
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| 219 | }
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| 220 |
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| 221 | static size_t eckey_get_bitlen( const void *ctx )
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| 222 | {
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| 223 | return( ((mbedtls_ecp_keypair *) ctx)->grp.pbits );
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| 224 | }
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| 225 |
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| 226 | #if defined(MBEDTLS_ECDSA_C)
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| 227 | /* Forward declarations */
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| 228 | static int ecdsa_verify_wrap( void *ctx, mbedtls_md_type_t md_alg,
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| 229 | const unsigned char *hash, size_t hash_len,
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| 230 | const unsigned char *sig, size_t sig_len );
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| 231 |
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| 232 | static int ecdsa_sign_wrap( void *ctx, mbedtls_md_type_t md_alg,
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| 233 | const unsigned char *hash, size_t hash_len,
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| 234 | unsigned char *sig, size_t *sig_len,
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| 235 | int (*f_rng)(void *, unsigned char *, size_t), void *p_rng );
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| 236 |
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| 237 | static int eckey_verify_wrap( void *ctx, mbedtls_md_type_t md_alg,
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| 238 | const unsigned char *hash, size_t hash_len,
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| 239 | const unsigned char *sig, size_t sig_len )
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| 240 | {
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| 241 | int ret;
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| 242 | mbedtls_ecdsa_context ecdsa;
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| 243 |
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| 244 | mbedtls_ecdsa_init( &ecdsa );
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| 245 |
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| 246 | if( ( ret = mbedtls_ecdsa_from_keypair( &ecdsa, ctx ) ) == 0 )
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| 247 | ret = ecdsa_verify_wrap( &ecdsa, md_alg, hash, hash_len, sig, sig_len );
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| 248 |
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| 249 | mbedtls_ecdsa_free( &ecdsa );
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| 250 |
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| 251 | return( ret );
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| 252 | }
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| 253 |
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| 254 | static int eckey_sign_wrap( void *ctx, mbedtls_md_type_t md_alg,
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| 255 | const unsigned char *hash, size_t hash_len,
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| 256 | unsigned char *sig, size_t *sig_len,
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| 257 | int (*f_rng)(void *, unsigned char *, size_t), void *p_rng )
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| 258 | {
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| 259 | int ret;
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| 260 | mbedtls_ecdsa_context ecdsa;
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| 261 |
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| 262 | mbedtls_ecdsa_init( &ecdsa );
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| 263 |
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| 264 | if( ( ret = mbedtls_ecdsa_from_keypair( &ecdsa, ctx ) ) == 0 )
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| 265 | ret = ecdsa_sign_wrap( &ecdsa, md_alg, hash, hash_len, sig, sig_len,
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| 266 | f_rng, p_rng );
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| 267 |
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| 268 | mbedtls_ecdsa_free( &ecdsa );
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| 269 |
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| 270 | return( ret );
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| 271 | }
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| 272 |
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| 273 | #if defined(MBEDTLS_ECP_RESTARTABLE)
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| 274 | /* Forward declarations */
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| 275 | static int ecdsa_verify_rs_wrap( void *ctx, mbedtls_md_type_t md_alg,
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| 276 | const unsigned char *hash, size_t hash_len,
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| 277 | const unsigned char *sig, size_t sig_len,
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| 278 | void *rs_ctx );
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| 279 |
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| 280 | static int ecdsa_sign_rs_wrap( void *ctx, mbedtls_md_type_t md_alg,
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| 281 | const unsigned char *hash, size_t hash_len,
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| 282 | unsigned char *sig, size_t *sig_len,
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| 283 | int (*f_rng)(void *, unsigned char *, size_t), void *p_rng,
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| 284 | void *rs_ctx );
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| 285 |
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| 286 | /*
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| 287 | * Restart context for ECDSA operations with ECKEY context
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| 288 | *
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| 289 | * We need to store an actual ECDSA context, as we need to pass the same to
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| 290 | * the underlying ecdsa function, so we can't create it on the fly every time.
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| 291 | */
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| 292 | typedef struct
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| 293 | {
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| 294 | mbedtls_ecdsa_restart_ctx ecdsa_rs;
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| 295 | mbedtls_ecdsa_context ecdsa_ctx;
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| 296 | } eckey_restart_ctx;
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| 297 |
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| 298 | static void *eckey_rs_alloc( void )
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| 299 | {
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| 300 | eckey_restart_ctx *rs_ctx;
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| 301 |
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| 302 | void *ctx = mbedtls_calloc( 1, sizeof( eckey_restart_ctx ) );
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| 303 |
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| 304 | if( ctx != NULL )
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| 305 | {
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| 306 | rs_ctx = ctx;
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| 307 | mbedtls_ecdsa_restart_init( &rs_ctx->ecdsa_rs );
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| 308 | mbedtls_ecdsa_init( &rs_ctx->ecdsa_ctx );
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| 309 | }
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| 310 |
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| 311 | return( ctx );
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| 312 | }
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| 313 |
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| 314 | static void eckey_rs_free( void *ctx )
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| 315 | {
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| 316 | eckey_restart_ctx *rs_ctx;
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| 317 |
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| 318 | if( ctx == NULL)
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| 319 | return;
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| 320 |
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| 321 | rs_ctx = ctx;
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| 322 | mbedtls_ecdsa_restart_free( &rs_ctx->ecdsa_rs );
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| 323 | mbedtls_ecdsa_free( &rs_ctx->ecdsa_ctx );
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| 324 |
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| 325 | mbedtls_free( ctx );
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| 326 | }
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| 327 |
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| 328 | static int eckey_verify_rs_wrap( void *ctx, mbedtls_md_type_t md_alg,
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| 329 | const unsigned char *hash, size_t hash_len,
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| 330 | const unsigned char *sig, size_t sig_len,
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| 331 | void *rs_ctx )
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| 332 | {
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| 333 | int ret;
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| 334 | eckey_restart_ctx *rs = rs_ctx;
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| 335 |
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| 336 | /* Should never happen */
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| 337 | if( rs == NULL )
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| 338 | return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
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| 339 |
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| 340 | /* set up our own sub-context if needed (that is, on first run) */
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| 341 | if( rs->ecdsa_ctx.grp.pbits == 0 )
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| 342 | MBEDTLS_MPI_CHK( mbedtls_ecdsa_from_keypair( &rs->ecdsa_ctx, ctx ) );
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| 343 |
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| 344 | MBEDTLS_MPI_CHK( ecdsa_verify_rs_wrap( &rs->ecdsa_ctx,
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| 345 | md_alg, hash, hash_len,
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| 346 | sig, sig_len, &rs->ecdsa_rs ) );
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| 347 |
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| 348 | cleanup:
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| 349 | return( ret );
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| 350 | }
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| 351 |
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| 352 | static int eckey_sign_rs_wrap( void *ctx, mbedtls_md_type_t md_alg,
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| 353 | const unsigned char *hash, size_t hash_len,
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| 354 | unsigned char *sig, size_t *sig_len,
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| 355 | int (*f_rng)(void *, unsigned char *, size_t), void *p_rng,
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| 356 | void *rs_ctx )
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| 357 | {
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| 358 | int ret;
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| 359 | eckey_restart_ctx *rs = rs_ctx;
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| 360 |
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| 361 | /* Should never happen */
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| 362 | if( rs == NULL )
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| 363 | return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
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| 364 |
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| 365 | /* set up our own sub-context if needed (that is, on first run) */
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| 366 | if( rs->ecdsa_ctx.grp.pbits == 0 )
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| 367 | MBEDTLS_MPI_CHK( mbedtls_ecdsa_from_keypair( &rs->ecdsa_ctx, ctx ) );
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| 368 |
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| 369 | MBEDTLS_MPI_CHK( ecdsa_sign_rs_wrap( &rs->ecdsa_ctx, md_alg,
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| 370 | hash, hash_len, sig, sig_len,
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| 371 | f_rng, p_rng, &rs->ecdsa_rs ) );
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| 372 |
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| 373 | cleanup:
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| 374 | return( ret );
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| 375 | }
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| 376 | #endif /* MBEDTLS_ECP_RESTARTABLE */
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| 377 | #endif /* MBEDTLS_ECDSA_C */
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| 378 |
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| 379 | static int eckey_check_pair( const void *pub, const void *prv )
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| 380 | {
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| 381 | return( mbedtls_ecp_check_pub_priv( (const mbedtls_ecp_keypair *) pub,
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| 382 | (const mbedtls_ecp_keypair *) prv ) );
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| 383 | }
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| 384 |
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| 385 | static void *eckey_alloc_wrap( void )
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| 386 | {
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| 387 | void *ctx = mbedtls_calloc( 1, sizeof( mbedtls_ecp_keypair ) );
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| 388 |
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| 389 | if( ctx != NULL )
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| 390 | mbedtls_ecp_keypair_init( ctx );
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| 391 |
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| 392 | return( ctx );
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| 393 | }
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| 394 |
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| 395 | static void eckey_free_wrap( void *ctx )
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| 396 | {
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| 397 | mbedtls_ecp_keypair_free( (mbedtls_ecp_keypair *) ctx );
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| 398 | mbedtls_free( ctx );
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| 399 | }
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| 400 |
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| 401 | static void eckey_debug( const void *ctx, mbedtls_pk_debug_item *items )
|
---|
| 402 | {
|
---|
| 403 | items->type = MBEDTLS_PK_DEBUG_ECP;
|
---|
| 404 | items->name = "eckey.Q";
|
---|
| 405 | items->value = &( ((mbedtls_ecp_keypair *) ctx)->Q );
|
---|
| 406 | }
|
---|
| 407 |
|
---|
| 408 | const mbedtls_pk_info_t mbedtls_eckey_info = {
|
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| 409 | MBEDTLS_PK_ECKEY,
|
---|
| 410 | "EC",
|
---|
| 411 | eckey_get_bitlen,
|
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| 412 | eckey_can_do,
|
---|
| 413 | #if defined(MBEDTLS_ECDSA_C)
|
---|
| 414 | eckey_verify_wrap,
|
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| 415 | eckey_sign_wrap,
|
---|
| 416 | #if defined(MBEDTLS_ECP_RESTARTABLE)
|
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| 417 | eckey_verify_rs_wrap,
|
---|
| 418 | eckey_sign_rs_wrap,
|
---|
| 419 | #endif
|
---|
| 420 | #else /* MBEDTLS_ECDSA_C */
|
---|
| 421 | NULL,
|
---|
| 422 | NULL,
|
---|
| 423 | #endif /* MBEDTLS_ECDSA_C */
|
---|
| 424 | NULL,
|
---|
| 425 | NULL,
|
---|
| 426 | eckey_check_pair,
|
---|
| 427 | eckey_alloc_wrap,
|
---|
| 428 | eckey_free_wrap,
|
---|
| 429 | #if defined(MBEDTLS_ECDSA_C) && defined(MBEDTLS_ECP_RESTARTABLE)
|
---|
| 430 | eckey_rs_alloc,
|
---|
| 431 | eckey_rs_free,
|
---|
| 432 | #endif
|
---|
| 433 | eckey_debug,
|
---|
| 434 | };
|
---|
| 435 |
|
---|
| 436 | /*
|
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| 437 | * EC key restricted to ECDH
|
---|
| 438 | */
|
---|
| 439 | static int eckeydh_can_do( mbedtls_pk_type_t type )
|
---|
| 440 | {
|
---|
| 441 | return( type == MBEDTLS_PK_ECKEY ||
|
---|
| 442 | type == MBEDTLS_PK_ECKEY_DH );
|
---|
| 443 | }
|
---|
| 444 |
|
---|
| 445 | const mbedtls_pk_info_t mbedtls_eckeydh_info = {
|
---|
| 446 | MBEDTLS_PK_ECKEY_DH,
|
---|
| 447 | "EC_DH",
|
---|
| 448 | eckey_get_bitlen, /* Same underlying key structure */
|
---|
| 449 | eckeydh_can_do,
|
---|
| 450 | NULL,
|
---|
| 451 | NULL,
|
---|
| 452 | #if defined(MBEDTLS_ECDSA_C) && defined(MBEDTLS_ECP_RESTARTABLE)
|
---|
| 453 | NULL,
|
---|
| 454 | NULL,
|
---|
| 455 | #endif
|
---|
| 456 | NULL,
|
---|
| 457 | NULL,
|
---|
| 458 | eckey_check_pair,
|
---|
| 459 | eckey_alloc_wrap, /* Same underlying key structure */
|
---|
| 460 | eckey_free_wrap, /* Same underlying key structure */
|
---|
| 461 | #if defined(MBEDTLS_ECDSA_C) && defined(MBEDTLS_ECP_RESTARTABLE)
|
---|
| 462 | NULL,
|
---|
| 463 | NULL,
|
---|
| 464 | #endif
|
---|
| 465 | eckey_debug, /* Same underlying key structure */
|
---|
| 466 | };
|
---|
| 467 | #endif /* MBEDTLS_ECP_C */
|
---|
| 468 |
|
---|
| 469 | #if defined(MBEDTLS_ECDSA_C)
|
---|
| 470 | static int ecdsa_can_do( mbedtls_pk_type_t type )
|
---|
| 471 | {
|
---|
| 472 | return( type == MBEDTLS_PK_ECDSA );
|
---|
| 473 | }
|
---|
| 474 |
|
---|
| 475 | static int ecdsa_verify_wrap( void *ctx, mbedtls_md_type_t md_alg,
|
---|
| 476 | const unsigned char *hash, size_t hash_len,
|
---|
| 477 | const unsigned char *sig, size_t sig_len )
|
---|
| 478 | {
|
---|
| 479 | int ret;
|
---|
| 480 | ((void) md_alg);
|
---|
| 481 |
|
---|
| 482 | ret = mbedtls_ecdsa_read_signature( (mbedtls_ecdsa_context *) ctx,
|
---|
| 483 | hash, hash_len, sig, sig_len );
|
---|
| 484 |
|
---|
| 485 | if( ret == MBEDTLS_ERR_ECP_SIG_LEN_MISMATCH )
|
---|
| 486 | return( MBEDTLS_ERR_PK_SIG_LEN_MISMATCH );
|
---|
| 487 |
|
---|
| 488 | return( ret );
|
---|
| 489 | }
|
---|
| 490 |
|
---|
| 491 | static int ecdsa_sign_wrap( void *ctx, mbedtls_md_type_t md_alg,
|
---|
| 492 | const unsigned char *hash, size_t hash_len,
|
---|
| 493 | unsigned char *sig, size_t *sig_len,
|
---|
| 494 | int (*f_rng)(void *, unsigned char *, size_t), void *p_rng )
|
---|
| 495 | {
|
---|
| 496 | return( mbedtls_ecdsa_write_signature( (mbedtls_ecdsa_context *) ctx,
|
---|
| 497 | md_alg, hash, hash_len, sig, sig_len, f_rng, p_rng ) );
|
---|
| 498 | }
|
---|
| 499 |
|
---|
| 500 | #if defined(MBEDTLS_ECP_RESTARTABLE)
|
---|
| 501 | static int ecdsa_verify_rs_wrap( void *ctx, mbedtls_md_type_t md_alg,
|
---|
| 502 | const unsigned char *hash, size_t hash_len,
|
---|
| 503 | const unsigned char *sig, size_t sig_len,
|
---|
| 504 | void *rs_ctx )
|
---|
| 505 | {
|
---|
| 506 | int ret;
|
---|
| 507 | ((void) md_alg);
|
---|
| 508 |
|
---|
| 509 | ret = mbedtls_ecdsa_read_signature_restartable(
|
---|
| 510 | (mbedtls_ecdsa_context *) ctx,
|
---|
| 511 | hash, hash_len, sig, sig_len,
|
---|
| 512 | (mbedtls_ecdsa_restart_ctx *) rs_ctx );
|
---|
| 513 |
|
---|
| 514 | if( ret == MBEDTLS_ERR_ECP_SIG_LEN_MISMATCH )
|
---|
| 515 | return( MBEDTLS_ERR_PK_SIG_LEN_MISMATCH );
|
---|
| 516 |
|
---|
| 517 | return( ret );
|
---|
| 518 | }
|
---|
| 519 |
|
---|
| 520 | static int ecdsa_sign_rs_wrap( void *ctx, mbedtls_md_type_t md_alg,
|
---|
| 521 | const unsigned char *hash, size_t hash_len,
|
---|
| 522 | unsigned char *sig, size_t *sig_len,
|
---|
| 523 | int (*f_rng)(void *, unsigned char *, size_t), void *p_rng,
|
---|
| 524 | void *rs_ctx )
|
---|
| 525 | {
|
---|
| 526 | return( mbedtls_ecdsa_write_signature_restartable(
|
---|
| 527 | (mbedtls_ecdsa_context *) ctx,
|
---|
| 528 | md_alg, hash, hash_len, sig, sig_len, f_rng, p_rng,
|
---|
| 529 | (mbedtls_ecdsa_restart_ctx *) rs_ctx ) );
|
---|
| 530 |
|
---|
| 531 | }
|
---|
| 532 | #endif /* MBEDTLS_ECP_RESTARTABLE */
|
---|
| 533 |
|
---|
| 534 | static void *ecdsa_alloc_wrap( void )
|
---|
| 535 | {
|
---|
| 536 | void *ctx = mbedtls_calloc( 1, sizeof( mbedtls_ecdsa_context ) );
|
---|
| 537 |
|
---|
| 538 | if( ctx != NULL )
|
---|
| 539 | mbedtls_ecdsa_init( (mbedtls_ecdsa_context *) ctx );
|
---|
| 540 |
|
---|
| 541 | return( ctx );
|
---|
| 542 | }
|
---|
| 543 |
|
---|
| 544 | static void ecdsa_free_wrap( void *ctx )
|
---|
| 545 | {
|
---|
| 546 | mbedtls_ecdsa_free( (mbedtls_ecdsa_context *) ctx );
|
---|
| 547 | mbedtls_free( ctx );
|
---|
| 548 | }
|
---|
| 549 |
|
---|
| 550 | #if defined(MBEDTLS_ECP_RESTARTABLE)
|
---|
| 551 | static void *ecdsa_rs_alloc( void )
|
---|
| 552 | {
|
---|
| 553 | void *ctx = mbedtls_calloc( 1, sizeof( mbedtls_ecdsa_restart_ctx ) );
|
---|
| 554 |
|
---|
| 555 | if( ctx != NULL )
|
---|
| 556 | mbedtls_ecdsa_restart_init( ctx );
|
---|
| 557 |
|
---|
| 558 | return( ctx );
|
---|
| 559 | }
|
---|
| 560 |
|
---|
| 561 | static void ecdsa_rs_free( void *ctx )
|
---|
| 562 | {
|
---|
| 563 | mbedtls_ecdsa_restart_free( ctx );
|
---|
| 564 | mbedtls_free( ctx );
|
---|
| 565 | }
|
---|
| 566 | #endif /* MBEDTLS_ECP_RESTARTABLE */
|
---|
| 567 |
|
---|
| 568 | const mbedtls_pk_info_t mbedtls_ecdsa_info = {
|
---|
| 569 | MBEDTLS_PK_ECDSA,
|
---|
| 570 | "ECDSA",
|
---|
| 571 | eckey_get_bitlen, /* Compatible key structures */
|
---|
| 572 | ecdsa_can_do,
|
---|
| 573 | ecdsa_verify_wrap,
|
---|
| 574 | ecdsa_sign_wrap,
|
---|
| 575 | #if defined(MBEDTLS_ECP_RESTARTABLE)
|
---|
| 576 | ecdsa_verify_rs_wrap,
|
---|
| 577 | ecdsa_sign_rs_wrap,
|
---|
| 578 | #endif
|
---|
| 579 | NULL,
|
---|
| 580 | NULL,
|
---|
| 581 | eckey_check_pair, /* Compatible key structures */
|
---|
| 582 | ecdsa_alloc_wrap,
|
---|
| 583 | ecdsa_free_wrap,
|
---|
| 584 | #if defined(MBEDTLS_ECP_RESTARTABLE)
|
---|
| 585 | ecdsa_rs_alloc,
|
---|
| 586 | ecdsa_rs_free,
|
---|
| 587 | #endif
|
---|
| 588 | eckey_debug, /* Compatible key structures */
|
---|
| 589 | };
|
---|
| 590 | #endif /* MBEDTLS_ECDSA_C */
|
---|
| 591 |
|
---|
| 592 | #if defined(MBEDTLS_PK_RSA_ALT_SUPPORT)
|
---|
| 593 | /*
|
---|
| 594 | * Support for alternative RSA-private implementations
|
---|
| 595 | */
|
---|
| 596 |
|
---|
| 597 | static int rsa_alt_can_do( mbedtls_pk_type_t type )
|
---|
| 598 | {
|
---|
| 599 | return( type == MBEDTLS_PK_RSA );
|
---|
| 600 | }
|
---|
| 601 |
|
---|
| 602 | static size_t rsa_alt_get_bitlen( const void *ctx )
|
---|
| 603 | {
|
---|
| 604 | const mbedtls_rsa_alt_context *rsa_alt = (const mbedtls_rsa_alt_context *) ctx;
|
---|
| 605 |
|
---|
| 606 | return( 8 * rsa_alt->key_len_func( rsa_alt->key ) );
|
---|
| 607 | }
|
---|
| 608 |
|
---|
| 609 | static int rsa_alt_sign_wrap( void *ctx, mbedtls_md_type_t md_alg,
|
---|
| 610 | const unsigned char *hash, size_t hash_len,
|
---|
| 611 | unsigned char *sig, size_t *sig_len,
|
---|
| 612 | int (*f_rng)(void *, unsigned char *, size_t), void *p_rng )
|
---|
| 613 | {
|
---|
| 614 | mbedtls_rsa_alt_context *rsa_alt = (mbedtls_rsa_alt_context *) ctx;
|
---|
| 615 |
|
---|
| 616 | #if SIZE_MAX > UINT_MAX
|
---|
| 617 | if( UINT_MAX < hash_len )
|
---|
| 618 | return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
|
---|
| 619 | #endif /* SIZE_MAX > UINT_MAX */
|
---|
| 620 |
|
---|
| 621 | *sig_len = rsa_alt->key_len_func( rsa_alt->key );
|
---|
| 622 |
|
---|
| 623 | return( rsa_alt->sign_func( rsa_alt->key, f_rng, p_rng, MBEDTLS_RSA_PRIVATE,
|
---|
| 624 | md_alg, (unsigned int) hash_len, hash, sig ) );
|
---|
| 625 | }
|
---|
| 626 |
|
---|
| 627 | static int rsa_alt_decrypt_wrap( void *ctx,
|
---|
| 628 | const unsigned char *input, size_t ilen,
|
---|
| 629 | unsigned char *output, size_t *olen, size_t osize,
|
---|
| 630 | int (*f_rng)(void *, unsigned char *, size_t), void *p_rng )
|
---|
| 631 | {
|
---|
| 632 | mbedtls_rsa_alt_context *rsa_alt = (mbedtls_rsa_alt_context *) ctx;
|
---|
| 633 |
|
---|
| 634 | ((void) f_rng);
|
---|
| 635 | ((void) p_rng);
|
---|
| 636 |
|
---|
| 637 | if( ilen != rsa_alt->key_len_func( rsa_alt->key ) )
|
---|
| 638 | return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
|
---|
| 639 |
|
---|
| 640 | return( rsa_alt->decrypt_func( rsa_alt->key,
|
---|
| 641 | MBEDTLS_RSA_PRIVATE, olen, input, output, osize ) );
|
---|
| 642 | }
|
---|
| 643 |
|
---|
| 644 | #if defined(MBEDTLS_RSA_C)
|
---|
| 645 | static int rsa_alt_check_pair( const void *pub, const void *prv )
|
---|
| 646 | {
|
---|
| 647 | unsigned char sig[MBEDTLS_MPI_MAX_SIZE];
|
---|
| 648 | unsigned char hash[32];
|
---|
| 649 | size_t sig_len = 0;
|
---|
| 650 | int ret;
|
---|
| 651 |
|
---|
| 652 | if( rsa_alt_get_bitlen( prv ) != rsa_get_bitlen( pub ) )
|
---|
| 653 | return( MBEDTLS_ERR_RSA_KEY_CHECK_FAILED );
|
---|
| 654 |
|
---|
| 655 | memset( hash, 0x2a, sizeof( hash ) );
|
---|
| 656 |
|
---|
| 657 | if( ( ret = rsa_alt_sign_wrap( (void *) prv, MBEDTLS_MD_NONE,
|
---|
| 658 | hash, sizeof( hash ),
|
---|
| 659 | sig, &sig_len, NULL, NULL ) ) != 0 )
|
---|
| 660 | {
|
---|
| 661 | return( ret );
|
---|
| 662 | }
|
---|
| 663 |
|
---|
| 664 | if( rsa_verify_wrap( (void *) pub, MBEDTLS_MD_NONE,
|
---|
| 665 | hash, sizeof( hash ), sig, sig_len ) != 0 )
|
---|
| 666 | {
|
---|
| 667 | return( MBEDTLS_ERR_RSA_KEY_CHECK_FAILED );
|
---|
| 668 | }
|
---|
| 669 |
|
---|
| 670 | return( 0 );
|
---|
| 671 | }
|
---|
| 672 | #endif /* MBEDTLS_RSA_C */
|
---|
| 673 |
|
---|
| 674 | static void *rsa_alt_alloc_wrap( void )
|
---|
| 675 | {
|
---|
| 676 | void *ctx = mbedtls_calloc( 1, sizeof( mbedtls_rsa_alt_context ) );
|
---|
| 677 |
|
---|
| 678 | if( ctx != NULL )
|
---|
| 679 | memset( ctx, 0, sizeof( mbedtls_rsa_alt_context ) );
|
---|
| 680 |
|
---|
| 681 | return( ctx );
|
---|
| 682 | }
|
---|
| 683 |
|
---|
| 684 | static void rsa_alt_free_wrap( void *ctx )
|
---|
| 685 | {
|
---|
| 686 | mbedtls_platform_zeroize( ctx, sizeof( mbedtls_rsa_alt_context ) );
|
---|
| 687 | mbedtls_free( ctx );
|
---|
| 688 | }
|
---|
| 689 |
|
---|
| 690 | const mbedtls_pk_info_t mbedtls_rsa_alt_info = {
|
---|
| 691 | MBEDTLS_PK_RSA_ALT,
|
---|
| 692 | "RSA-alt",
|
---|
| 693 | rsa_alt_get_bitlen,
|
---|
| 694 | rsa_alt_can_do,
|
---|
| 695 | NULL,
|
---|
| 696 | rsa_alt_sign_wrap,
|
---|
| 697 | #if defined(MBEDTLS_ECDSA_C) && defined(MBEDTLS_ECP_RESTARTABLE)
|
---|
| 698 | NULL,
|
---|
| 699 | NULL,
|
---|
| 700 | #endif
|
---|
| 701 | rsa_alt_decrypt_wrap,
|
---|
| 702 | NULL,
|
---|
| 703 | #if defined(MBEDTLS_RSA_C)
|
---|
| 704 | rsa_alt_check_pair,
|
---|
| 705 | #else
|
---|
| 706 | NULL,
|
---|
| 707 | #endif
|
---|
| 708 | rsa_alt_alloc_wrap,
|
---|
| 709 | rsa_alt_free_wrap,
|
---|
| 710 | #if defined(MBEDTLS_ECDSA_C) && defined(MBEDTLS_ECP_RESTARTABLE)
|
---|
| 711 | NULL,
|
---|
| 712 | NULL,
|
---|
| 713 | #endif
|
---|
| 714 | NULL,
|
---|
| 715 | };
|
---|
| 716 |
|
---|
| 717 | #endif /* MBEDTLS_PK_RSA_ALT_SUPPORT */
|
---|
| 718 |
|
---|
| 719 | #endif /* MBEDTLS_PK_C */
|
---|