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 )
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402 | {
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403 | items->type = MBEDTLS_PK_DEBUG_ECP;
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404 | items->name = "eckey.Q";
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405 | items->value = &( ((mbedtls_ecp_keypair *) ctx)->Q );
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406 | }
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407 |
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408 | const mbedtls_pk_info_t mbedtls_eckey_info = {
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409 | MBEDTLS_PK_ECKEY,
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410 | "EC",
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411 | eckey_get_bitlen,
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412 | eckey_can_do,
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413 | #if defined(MBEDTLS_ECDSA_C)
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414 | eckey_verify_wrap,
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415 | eckey_sign_wrap,
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416 | #if defined(MBEDTLS_ECP_RESTARTABLE)
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417 | eckey_verify_rs_wrap,
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418 | eckey_sign_rs_wrap,
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419 | #endif
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420 | #else /* MBEDTLS_ECDSA_C */
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421 | NULL,
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---|
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 | /*
|
---|
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 */
|
---|