Simon Cooksey / mbed-os

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features/mbedtls/src/pkcs11.c@0:fb7af294d5d9, 2016-11-17 (annotated)

Committer:
Simon Cooksey
Date:
Thu Nov 17 16:43:53 2016 +0000
Revision:
0:fb7af294d5d9
Initial commit

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Simon Cooksey 0:fb7af294d5d9 1 /**
Simon Cooksey 0:fb7af294d5d9 2 * \file pkcs11.c
Simon Cooksey 0:fb7af294d5d9 3 *
Simon Cooksey 0:fb7af294d5d9 4 * \brief Wrapper for PKCS#11 library libpkcs11-helper
Simon Cooksey 0:fb7af294d5d9 5 *
Simon Cooksey 0:fb7af294d5d9 6 * \author Adriaan de Jong <dejong@fox-it.com>
Simon Cooksey 0:fb7af294d5d9 7 *
Simon Cooksey 0:fb7af294d5d9 8 * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
Simon Cooksey 0:fb7af294d5d9 9 * SPDX-License-Identifier: Apache-2.0
Simon Cooksey 0:fb7af294d5d9 10 *
Simon Cooksey 0:fb7af294d5d9 11 * Licensed under the Apache License, Version 2.0 (the "License"); you may
Simon Cooksey 0:fb7af294d5d9 12 * not use this file except in compliance with the License.
Simon Cooksey 0:fb7af294d5d9 13 * You may obtain a copy of the License at
Simon Cooksey 0:fb7af294d5d9 14 *
Simon Cooksey 0:fb7af294d5d9 15 * http://www.apache.org/licenses/LICENSE-2.0
Simon Cooksey 0:fb7af294d5d9 16 *
Simon Cooksey 0:fb7af294d5d9 17 * Unless required by applicable law or agreed to in writing, software
Simon Cooksey 0:fb7af294d5d9 18 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
Simon Cooksey 0:fb7af294d5d9 19 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
Simon Cooksey 0:fb7af294d5d9 20 * See the License for the specific language governing permissions and
Simon Cooksey 0:fb7af294d5d9 21 * limitations under the License.
Simon Cooksey 0:fb7af294d5d9 22 *
Simon Cooksey 0:fb7af294d5d9 23 * This file is part of mbed TLS (https://tls.mbed.org)
Simon Cooksey 0:fb7af294d5d9 24 */
Simon Cooksey 0:fb7af294d5d9 25
Simon Cooksey 0:fb7af294d5d9 26 #include "mbedtls/pkcs11.h"
Simon Cooksey 0:fb7af294d5d9 27
Simon Cooksey 0:fb7af294d5d9 28 #if defined(MBEDTLS_PKCS11_C)
Simon Cooksey 0:fb7af294d5d9 29
Simon Cooksey 0:fb7af294d5d9 30 #include "mbedtls/md.h"
Simon Cooksey 0:fb7af294d5d9 31 #include "mbedtls/oid.h"
Simon Cooksey 0:fb7af294d5d9 32 #include "mbedtls/x509_crt.h"
Simon Cooksey 0:fb7af294d5d9 33
Simon Cooksey 0:fb7af294d5d9 34 #if defined(MBEDTLS_PLATFORM_C)
Simon Cooksey 0:fb7af294d5d9 35 #include "mbedtls/platform.h"
Simon Cooksey 0:fb7af294d5d9 36 #else
Simon Cooksey 0:fb7af294d5d9 37 #include <stdlib.h>
Simon Cooksey 0:fb7af294d5d9 38 #define mbedtls_calloc calloc
Simon Cooksey 0:fb7af294d5d9 39 #define mbedtls_free free
Simon Cooksey 0:fb7af294d5d9 40 #endif
Simon Cooksey 0:fb7af294d5d9 41
Simon Cooksey 0:fb7af294d5d9 42 #include <string.h>
Simon Cooksey 0:fb7af294d5d9 43
Simon Cooksey 0:fb7af294d5d9 44 void mbedtls_pkcs11_init( mbedtls_pkcs11_context *ctx )
Simon Cooksey 0:fb7af294d5d9 45 {
Simon Cooksey 0:fb7af294d5d9 46 memset( ctx, 0, sizeof( mbedtls_pkcs11_context ) );
Simon Cooksey 0:fb7af294d5d9 47 }
Simon Cooksey 0:fb7af294d5d9 48
Simon Cooksey 0:fb7af294d5d9 49 int mbedtls_pkcs11_x509_cert_bind( mbedtls_x509_crt *cert, pkcs11h_certificate_t pkcs11_cert )
Simon Cooksey 0:fb7af294d5d9 50 {
Simon Cooksey 0:fb7af294d5d9 51 int ret = 1;
Simon Cooksey 0:fb7af294d5d9 52 unsigned char *cert_blob = NULL;
Simon Cooksey 0:fb7af294d5d9 53 size_t cert_blob_size = 0;
Simon Cooksey 0:fb7af294d5d9 54
Simon Cooksey 0:fb7af294d5d9 55 if( cert == NULL )
Simon Cooksey 0:fb7af294d5d9 56 {
Simon Cooksey 0:fb7af294d5d9 57 ret = 2;
Simon Cooksey 0:fb7af294d5d9 58 goto cleanup;
Simon Cooksey 0:fb7af294d5d9 59 }
Simon Cooksey 0:fb7af294d5d9 60
Simon Cooksey 0:fb7af294d5d9 61 if( pkcs11h_certificate_getCertificateBlob( pkcs11_cert, NULL,
Simon Cooksey 0:fb7af294d5d9 62 &cert_blob_size ) != CKR_OK )
Simon Cooksey 0:fb7af294d5d9 63 {
Simon Cooksey 0:fb7af294d5d9 64 ret = 3;
Simon Cooksey 0:fb7af294d5d9 65 goto cleanup;
Simon Cooksey 0:fb7af294d5d9 66 }
Simon Cooksey 0:fb7af294d5d9 67
Simon Cooksey 0:fb7af294d5d9 68 cert_blob = mbedtls_calloc( 1, cert_blob_size );
Simon Cooksey 0:fb7af294d5d9 69 if( NULL == cert_blob )
Simon Cooksey 0:fb7af294d5d9 70 {
Simon Cooksey 0:fb7af294d5d9 71 ret = 4;
Simon Cooksey 0:fb7af294d5d9 72 goto cleanup;
Simon Cooksey 0:fb7af294d5d9 73 }
Simon Cooksey 0:fb7af294d5d9 74
Simon Cooksey 0:fb7af294d5d9 75 if( pkcs11h_certificate_getCertificateBlob( pkcs11_cert, cert_blob,
Simon Cooksey 0:fb7af294d5d9 76 &cert_blob_size ) != CKR_OK )
Simon Cooksey 0:fb7af294d5d9 77 {
Simon Cooksey 0:fb7af294d5d9 78 ret = 5;
Simon Cooksey 0:fb7af294d5d9 79 goto cleanup;
Simon Cooksey 0:fb7af294d5d9 80 }
Simon Cooksey 0:fb7af294d5d9 81
Simon Cooksey 0:fb7af294d5d9 82 if( 0 != mbedtls_x509_crt_parse( cert, cert_blob, cert_blob_size ) )
Simon Cooksey 0:fb7af294d5d9 83 {
Simon Cooksey 0:fb7af294d5d9 84 ret = 6;
Simon Cooksey 0:fb7af294d5d9 85 goto cleanup;
Simon Cooksey 0:fb7af294d5d9 86 }
Simon Cooksey 0:fb7af294d5d9 87
Simon Cooksey 0:fb7af294d5d9 88 ret = 0;
Simon Cooksey 0:fb7af294d5d9 89
Simon Cooksey 0:fb7af294d5d9 90 cleanup:
Simon Cooksey 0:fb7af294d5d9 91 if( NULL != cert_blob )
Simon Cooksey 0:fb7af294d5d9 92 mbedtls_free( cert_blob );
Simon Cooksey 0:fb7af294d5d9 93
Simon Cooksey 0:fb7af294d5d9 94 return( ret );
Simon Cooksey 0:fb7af294d5d9 95 }
Simon Cooksey 0:fb7af294d5d9 96
Simon Cooksey 0:fb7af294d5d9 97
Simon Cooksey 0:fb7af294d5d9 98 int mbedtls_pkcs11_priv_key_bind( mbedtls_pkcs11_context *priv_key,
Simon Cooksey 0:fb7af294d5d9 99 pkcs11h_certificate_t pkcs11_cert )
Simon Cooksey 0:fb7af294d5d9 100 {
Simon Cooksey 0:fb7af294d5d9 101 int ret = 1;
Simon Cooksey 0:fb7af294d5d9 102 mbedtls_x509_crt cert;
Simon Cooksey 0:fb7af294d5d9 103
Simon Cooksey 0:fb7af294d5d9 104 mbedtls_x509_crt_init( &cert );
Simon Cooksey 0:fb7af294d5d9 105
Simon Cooksey 0:fb7af294d5d9 106 if( priv_key == NULL )
Simon Cooksey 0:fb7af294d5d9 107 goto cleanup;
Simon Cooksey 0:fb7af294d5d9 108
Simon Cooksey 0:fb7af294d5d9 109 if( 0 != mbedtls_pkcs11_x509_cert_bind( &cert, pkcs11_cert ) )
Simon Cooksey 0:fb7af294d5d9 110 goto cleanup;
Simon Cooksey 0:fb7af294d5d9 111
Simon Cooksey 0:fb7af294d5d9 112 priv_key->len = mbedtls_pk_get_len( &cert.pk );
Simon Cooksey 0:fb7af294d5d9 113 priv_key->pkcs11h_cert = pkcs11_cert;
Simon Cooksey 0:fb7af294d5d9 114
Simon Cooksey 0:fb7af294d5d9 115 ret = 0;
Simon Cooksey 0:fb7af294d5d9 116
Simon Cooksey 0:fb7af294d5d9 117 cleanup:
Simon Cooksey 0:fb7af294d5d9 118 mbedtls_x509_crt_free( &cert );
Simon Cooksey 0:fb7af294d5d9 119
Simon Cooksey 0:fb7af294d5d9 120 return( ret );
Simon Cooksey 0:fb7af294d5d9 121 }
Simon Cooksey 0:fb7af294d5d9 122
Simon Cooksey 0:fb7af294d5d9 123 void mbedtls_pkcs11_priv_key_free( mbedtls_pkcs11_context *priv_key )
Simon Cooksey 0:fb7af294d5d9 124 {
Simon Cooksey 0:fb7af294d5d9 125 if( NULL != priv_key )
Simon Cooksey 0:fb7af294d5d9 126 pkcs11h_certificate_freeCertificate( priv_key->pkcs11h_cert );
Simon Cooksey 0:fb7af294d5d9 127 }
Simon Cooksey 0:fb7af294d5d9 128
Simon Cooksey 0:fb7af294d5d9 129 int mbedtls_pkcs11_decrypt( mbedtls_pkcs11_context *ctx,
Simon Cooksey 0:fb7af294d5d9 130 int mode, size_t *olen,
Simon Cooksey 0:fb7af294d5d9 131 const unsigned char *input,
Simon Cooksey 0:fb7af294d5d9 132 unsigned char *output,
Simon Cooksey 0:fb7af294d5d9 133 size_t output_max_len )
Simon Cooksey 0:fb7af294d5d9 134 {
Simon Cooksey 0:fb7af294d5d9 135 size_t input_len, output_len;
Simon Cooksey 0:fb7af294d5d9 136
Simon Cooksey 0:fb7af294d5d9 137 if( NULL == ctx )
Simon Cooksey 0:fb7af294d5d9 138 return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
Simon Cooksey 0:fb7af294d5d9 139
Simon Cooksey 0:fb7af294d5d9 140 if( MBEDTLS_RSA_PRIVATE != mode )
Simon Cooksey 0:fb7af294d5d9 141 return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
Simon Cooksey 0:fb7af294d5d9 142
Simon Cooksey 0:fb7af294d5d9 143 output_len = input_len = ctx->len;
Simon Cooksey 0:fb7af294d5d9 144
Simon Cooksey 0:fb7af294d5d9 145 if( input_len < 16 || input_len > output_max_len )
Simon Cooksey 0:fb7af294d5d9 146 return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
Simon Cooksey 0:fb7af294d5d9 147
Simon Cooksey 0:fb7af294d5d9 148 /* Determine size of output buffer */
Simon Cooksey 0:fb7af294d5d9 149 if( pkcs11h_certificate_decryptAny( ctx->pkcs11h_cert, CKM_RSA_PKCS, input,
Simon Cooksey 0:fb7af294d5d9 150 input_len, NULL, &output_len ) != CKR_OK )
Simon Cooksey 0:fb7af294d5d9 151 {
Simon Cooksey 0:fb7af294d5d9 152 return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
Simon Cooksey 0:fb7af294d5d9 153 }
Simon Cooksey 0:fb7af294d5d9 154
Simon Cooksey 0:fb7af294d5d9 155 if( output_len > output_max_len )
Simon Cooksey 0:fb7af294d5d9 156 return( MBEDTLS_ERR_RSA_OUTPUT_TOO_LARGE );
Simon Cooksey 0:fb7af294d5d9 157
Simon Cooksey 0:fb7af294d5d9 158 if( pkcs11h_certificate_decryptAny( ctx->pkcs11h_cert, CKM_RSA_PKCS, input,
Simon Cooksey 0:fb7af294d5d9 159 input_len, output, &output_len ) != CKR_OK )
Simon Cooksey 0:fb7af294d5d9 160 {
Simon Cooksey 0:fb7af294d5d9 161 return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
Simon Cooksey 0:fb7af294d5d9 162 }
Simon Cooksey 0:fb7af294d5d9 163 *olen = output_len;
Simon Cooksey 0:fb7af294d5d9 164 return( 0 );
Simon Cooksey 0:fb7af294d5d9 165 }
Simon Cooksey 0:fb7af294d5d9 166
Simon Cooksey 0:fb7af294d5d9 167 int mbedtls_pkcs11_sign( mbedtls_pkcs11_context *ctx,
Simon Cooksey 0:fb7af294d5d9 168 int mode,
Simon Cooksey 0:fb7af294d5d9 169 mbedtls_md_type_t md_alg,
Simon Cooksey 0:fb7af294d5d9 170 unsigned int hashlen,
Simon Cooksey 0:fb7af294d5d9 171 const unsigned char *hash,
Simon Cooksey 0:fb7af294d5d9 172 unsigned char *sig )
Simon Cooksey 0:fb7af294d5d9 173 {
Simon Cooksey 0:fb7af294d5d9 174 size_t sig_len = 0, asn_len = 0, oid_size = 0;
Simon Cooksey 0:fb7af294d5d9 175 unsigned char *p = sig;
Simon Cooksey 0:fb7af294d5d9 176 const char *oid;
Simon Cooksey 0:fb7af294d5d9 177
Simon Cooksey 0:fb7af294d5d9 178 if( NULL == ctx )
Simon Cooksey 0:fb7af294d5d9 179 return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
Simon Cooksey 0:fb7af294d5d9 180
Simon Cooksey 0:fb7af294d5d9 181 if( MBEDTLS_RSA_PRIVATE != mode )
Simon Cooksey 0:fb7af294d5d9 182 return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
Simon Cooksey 0:fb7af294d5d9 183
Simon Cooksey 0:fb7af294d5d9 184 if( md_alg != MBEDTLS_MD_NONE )
Simon Cooksey 0:fb7af294d5d9 185 {
Simon Cooksey 0:fb7af294d5d9 186 const mbedtls_md_info_t *md_info = mbedtls_md_info_from_type( md_alg );
Simon Cooksey 0:fb7af294d5d9 187 if( md_info == NULL )
Simon Cooksey 0:fb7af294d5d9 188 return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
Simon Cooksey 0:fb7af294d5d9 189
Simon Cooksey 0:fb7af294d5d9 190 if( mbedtls_oid_get_oid_by_md( md_alg, &oid, &oid_size ) != 0 )
Simon Cooksey 0:fb7af294d5d9 191 return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
Simon Cooksey 0:fb7af294d5d9 192
Simon Cooksey 0:fb7af294d5d9 193 hashlen = mbedtls_md_get_size( md_info );
Simon Cooksey 0:fb7af294d5d9 194 asn_len = 10 + oid_size;
Simon Cooksey 0:fb7af294d5d9 195 }
Simon Cooksey 0:fb7af294d5d9 196
Simon Cooksey 0:fb7af294d5d9 197 sig_len = ctx->len;
Simon Cooksey 0:fb7af294d5d9 198 if( hashlen > sig_len || asn_len > sig_len ||
Simon Cooksey 0:fb7af294d5d9 199 hashlen + asn_len > sig_len )
Simon Cooksey 0:fb7af294d5d9 200 {
Simon Cooksey 0:fb7af294d5d9 201 return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
Simon Cooksey 0:fb7af294d5d9 202 }
Simon Cooksey 0:fb7af294d5d9 203
Simon Cooksey 0:fb7af294d5d9 204 if( md_alg != MBEDTLS_MD_NONE )
Simon Cooksey 0:fb7af294d5d9 205 {
Simon Cooksey 0:fb7af294d5d9 206 /*
Simon Cooksey 0:fb7af294d5d9 207 * DigestInfo ::= SEQUENCE {
Simon Cooksey 0:fb7af294d5d9 208 * digestAlgorithm DigestAlgorithmIdentifier,
Simon Cooksey 0:fb7af294d5d9 209 * digest Digest }
Simon Cooksey 0:fb7af294d5d9 210 *
Simon Cooksey 0:fb7af294d5d9 211 * DigestAlgorithmIdentifier ::= AlgorithmIdentifier
Simon Cooksey 0:fb7af294d5d9 212 *
Simon Cooksey 0:fb7af294d5d9 213 * Digest ::= OCTET STRING
Simon Cooksey 0:fb7af294d5d9 214 */
Simon Cooksey 0:fb7af294d5d9 215 *p++ = MBEDTLS_ASN1_SEQUENCE | MBEDTLS_ASN1_CONSTRUCTED;
Simon Cooksey 0:fb7af294d5d9 216 *p++ = (unsigned char) ( 0x08 + oid_size + hashlen );
Simon Cooksey 0:fb7af294d5d9 217 *p++ = MBEDTLS_ASN1_SEQUENCE | MBEDTLS_ASN1_CONSTRUCTED;
Simon Cooksey 0:fb7af294d5d9 218 *p++ = (unsigned char) ( 0x04 + oid_size );
Simon Cooksey 0:fb7af294d5d9 219 *p++ = MBEDTLS_ASN1_OID;
Simon Cooksey 0:fb7af294d5d9 220 *p++ = oid_size & 0xFF;
Simon Cooksey 0:fb7af294d5d9 221 memcpy( p, oid, oid_size );
Simon Cooksey 0:fb7af294d5d9 222 p += oid_size;
Simon Cooksey 0:fb7af294d5d9 223 *p++ = MBEDTLS_ASN1_NULL;
Simon Cooksey 0:fb7af294d5d9 224 *p++ = 0x00;
Simon Cooksey 0:fb7af294d5d9 225 *p++ = MBEDTLS_ASN1_OCTET_STRING;
Simon Cooksey 0:fb7af294d5d9 226 *p++ = hashlen;
Simon Cooksey 0:fb7af294d5d9 227 }
Simon Cooksey 0:fb7af294d5d9 228
Simon Cooksey 0:fb7af294d5d9 229 memcpy( p, hash, hashlen );
Simon Cooksey 0:fb7af294d5d9 230
Simon Cooksey 0:fb7af294d5d9 231 if( pkcs11h_certificate_signAny( ctx->pkcs11h_cert, CKM_RSA_PKCS, sig,
Simon Cooksey 0:fb7af294d5d9 232 asn_len + hashlen, sig, &sig_len ) != CKR_OK )
Simon Cooksey 0:fb7af294d5d9 233 {
Simon Cooksey 0:fb7af294d5d9 234 return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
Simon Cooksey 0:fb7af294d5d9 235 }
Simon Cooksey 0:fb7af294d5d9 236
Simon Cooksey 0:fb7af294d5d9 237 return( 0 );
Simon Cooksey 0:fb7af294d5d9 238 }
Simon Cooksey 0:fb7af294d5d9 239
Simon Cooksey 0:fb7af294d5d9 240 #endif /* defined(MBEDTLS_PKCS11_C) */