1 | /**
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2 | * \file pkcs11.c
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3 | *
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4 | * \brief Wrapper for PKCS#11 library libpkcs11-helper
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5 | *
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6 | * \author Adriaan de Jong <dejong@fox-it.com>
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7 | *
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8 | * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
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9 | * SPDX-License-Identifier: Apache-2.0
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10 | *
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11 | * Licensed under the Apache License, Version 2.0 (the "License"); you may
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12 | * not use this file except in compliance with the License.
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13 | * You may obtain a copy of the License at
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14 | *
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15 | * http://www.apache.org/licenses/LICENSE-2.0
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16 | *
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17 | * Unless required by applicable law or agreed to in writing, software
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18 | * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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19 | * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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20 | * See the License for the specific language governing permissions and
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21 | * limitations under the License.
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22 | *
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23 | * This file is part of mbed TLS (https://tls.mbed.org)
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24 | */
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25 |
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26 | #include "mbedtls/pkcs11.h"
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27 |
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28 | #if defined(MBEDTLS_PKCS11_C)
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29 |
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30 | #include "mbedtls/md.h"
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31 | #include "mbedtls/oid.h"
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32 | #include "mbedtls/x509_crt.h"
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33 |
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34 | #if defined(MBEDTLS_PLATFORM_C)
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35 | #include "mbedtls/platform.h"
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36 | #else
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37 | #include <stdlib.h>
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38 | #define mbedtls_calloc calloc
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39 | #define mbedtls_free free
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40 | #endif
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41 |
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42 | #include <string.h>
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43 |
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44 | void mbedtls_pkcs11_init( mbedtls_pkcs11_context *ctx )
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45 | {
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46 | memset( ctx, 0, sizeof( mbedtls_pkcs11_context ) );
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47 | }
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48 |
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49 | int mbedtls_pkcs11_x509_cert_bind( mbedtls_x509_crt *cert, pkcs11h_certificate_t pkcs11_cert )
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50 | {
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51 | int ret = 1;
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52 | unsigned char *cert_blob = NULL;
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53 | size_t cert_blob_size = 0;
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54 |
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55 | if( cert == NULL )
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56 | {
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57 | ret = 2;
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58 | goto cleanup;
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59 | }
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60 |
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61 | if( pkcs11h_certificate_getCertificateBlob( pkcs11_cert, NULL,
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62 | &cert_blob_size ) != CKR_OK )
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63 | {
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64 | ret = 3;
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65 | goto cleanup;
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66 | }
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67 |
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68 | cert_blob = mbedtls_calloc( 1, cert_blob_size );
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69 | if( NULL == cert_blob )
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70 | {
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71 | ret = 4;
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72 | goto cleanup;
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73 | }
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74 |
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75 | if( pkcs11h_certificate_getCertificateBlob( pkcs11_cert, cert_blob,
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76 | &cert_blob_size ) != CKR_OK )
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77 | {
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78 | ret = 5;
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79 | goto cleanup;
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80 | }
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81 |
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82 | if( 0 != mbedtls_x509_crt_parse( cert, cert_blob, cert_blob_size ) )
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83 | {
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84 | ret = 6;
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85 | goto cleanup;
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86 | }
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87 |
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88 | ret = 0;
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89 |
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90 | cleanup:
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91 | if( NULL != cert_blob )
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92 | mbedtls_free( cert_blob );
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93 |
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94 | return( ret );
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95 | }
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96 |
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97 |
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98 | int mbedtls_pkcs11_priv_key_bind( mbedtls_pkcs11_context *priv_key,
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99 | pkcs11h_certificate_t pkcs11_cert )
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100 | {
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101 | int ret = 1;
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102 | mbedtls_x509_crt cert;
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103 |
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104 | mbedtls_x509_crt_init( &cert );
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105 |
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106 | if( priv_key == NULL )
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107 | goto cleanup;
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108 |
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109 | if( 0 != mbedtls_pkcs11_x509_cert_bind( &cert, pkcs11_cert ) )
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110 | goto cleanup;
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111 |
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112 | priv_key->len = mbedtls_pk_get_len( &cert.pk );
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113 | priv_key->pkcs11h_cert = pkcs11_cert;
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114 |
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115 | ret = 0;
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116 |
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117 | cleanup:
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118 | mbedtls_x509_crt_free( &cert );
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119 |
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120 | return( ret );
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121 | }
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122 |
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123 | void mbedtls_pkcs11_priv_key_free( mbedtls_pkcs11_context *priv_key )
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124 | {
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125 | if( NULL != priv_key )
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126 | pkcs11h_certificate_freeCertificate( priv_key->pkcs11h_cert );
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127 | }
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128 |
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129 | int mbedtls_pkcs11_decrypt( mbedtls_pkcs11_context *ctx,
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130 | int mode, size_t *olen,
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131 | const unsigned char *input,
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132 | unsigned char *output,
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133 | size_t output_max_len )
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134 | {
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135 | size_t input_len, output_len;
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136 |
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137 | if( NULL == ctx )
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138 | return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
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139 |
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140 | if( MBEDTLS_RSA_PRIVATE != mode )
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141 | return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
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142 |
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143 | output_len = input_len = ctx->len;
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144 |
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145 | if( input_len < 16 || input_len > output_max_len )
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146 | return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
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147 |
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148 | /* Determine size of output buffer */
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149 | if( pkcs11h_certificate_decryptAny( ctx->pkcs11h_cert, CKM_RSA_PKCS, input,
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150 | input_len, NULL, &output_len ) != CKR_OK )
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151 | {
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152 | return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
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153 | }
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154 |
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155 | if( output_len > output_max_len )
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156 | return( MBEDTLS_ERR_RSA_OUTPUT_TOO_LARGE );
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157 |
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158 | if( pkcs11h_certificate_decryptAny( ctx->pkcs11h_cert, CKM_RSA_PKCS, input,
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159 | input_len, output, &output_len ) != CKR_OK )
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160 | {
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161 | return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
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162 | }
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163 | *olen = output_len;
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164 | return( 0 );
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165 | }
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166 |
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167 | int mbedtls_pkcs11_sign( mbedtls_pkcs11_context *ctx,
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168 | int mode,
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169 | mbedtls_md_type_t md_alg,
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170 | unsigned int hashlen,
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171 | const unsigned char *hash,
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172 | unsigned char *sig )
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173 | {
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174 | size_t sig_len = 0, asn_len = 0, oid_size = 0;
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175 | unsigned char *p = sig;
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176 | const char *oid;
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177 |
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178 | if( NULL == ctx )
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179 | return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
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180 |
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181 | if( MBEDTLS_RSA_PRIVATE != mode )
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182 | return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
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183 |
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184 | if( md_alg != MBEDTLS_MD_NONE )
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185 | {
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186 | const mbedtls_md_info_t *md_info = mbedtls_md_info_from_type( md_alg );
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187 | if( md_info == NULL )
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188 | return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
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189 |
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190 | if( mbedtls_oid_get_oid_by_md( md_alg, &oid, &oid_size ) != 0 )
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191 | return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
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192 |
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193 | hashlen = mbedtls_md_get_size( md_info );
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194 | asn_len = 10 + oid_size;
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195 | }
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196 |
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197 | sig_len = ctx->len;
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198 | if( hashlen > sig_len || asn_len > sig_len ||
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199 | hashlen + asn_len > sig_len )
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200 | {
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201 | return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
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202 | }
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203 |
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204 | if( md_alg != MBEDTLS_MD_NONE )
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205 | {
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206 | /*
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207 | * DigestInfo ::= SEQUENCE {
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208 | * digestAlgorithm DigestAlgorithmIdentifier,
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209 | * digest Digest }
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210 | *
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211 | * DigestAlgorithmIdentifier ::= AlgorithmIdentifier
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212 | *
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213 | * Digest ::= OCTET STRING
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214 | */
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215 | *p++ = MBEDTLS_ASN1_SEQUENCE | MBEDTLS_ASN1_CONSTRUCTED;
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216 | *p++ = (unsigned char) ( 0x08 + oid_size + hashlen );
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217 | *p++ = MBEDTLS_ASN1_SEQUENCE | MBEDTLS_ASN1_CONSTRUCTED;
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218 | *p++ = (unsigned char) ( 0x04 + oid_size );
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219 | *p++ = MBEDTLS_ASN1_OID;
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220 | *p++ = oid_size & 0xFF;
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221 | memcpy( p, oid, oid_size );
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222 | p += oid_size;
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223 | *p++ = MBEDTLS_ASN1_NULL;
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224 | *p++ = 0x00;
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225 | *p++ = MBEDTLS_ASN1_OCTET_STRING;
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226 | *p++ = hashlen;
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227 | }
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228 |
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229 | memcpy( p, hash, hashlen );
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230 |
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231 | if( pkcs11h_certificate_signAny( ctx->pkcs11h_cert, CKM_RSA_PKCS, sig,
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232 | asn_len + hashlen, sig, &sig_len ) != CKR_OK )
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233 | {
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234 | return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
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235 | }
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236 |
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237 | return( 0 );
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238 | }
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239 |
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240 | #endif /* defined(MBEDTLS_PKCS11_C) */
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