Marco Zecchini / Mbed OS Example_RTOS

Rtos API example

mbed-os/features/mbedtls/src/pkcs11.c@0:9fca2b23d0ba, 2019-02-23 (annotated)

Committer:
marcozecchini
Date:
Sat Feb 23 12:13:36 2019 +0000
Revision:
0:9fca2b23d0ba
final commit

Who changed what in which revision?

UserRevisionLine numberNew contents of line
marcozecchini 0:9fca2b23d0ba 1 /**
marcozecchini 0:9fca2b23d0ba 2 * \file pkcs11.c
marcozecchini 0:9fca2b23d0ba 3 *
marcozecchini 0:9fca2b23d0ba 4 * \brief Wrapper for PKCS#11 library libpkcs11-helper
marcozecchini 0:9fca2b23d0ba 5 *
marcozecchini 0:9fca2b23d0ba 6 * \author Adriaan de Jong <dejong@fox-it.com>
marcozecchini 0:9fca2b23d0ba 7 *
marcozecchini 0:9fca2b23d0ba 8 * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
marcozecchini 0:9fca2b23d0ba 9 * SPDX-License-Identifier: Apache-2.0
marcozecchini 0:9fca2b23d0ba 10 *
marcozecchini 0:9fca2b23d0ba 11 * Licensed under the Apache License, Version 2.0 (the "License"); you may
marcozecchini 0:9fca2b23d0ba 12 * not use this file except in compliance with the License.
marcozecchini 0:9fca2b23d0ba 13 * You may obtain a copy of the License at
marcozecchini 0:9fca2b23d0ba 14 *
marcozecchini 0:9fca2b23d0ba 15 * http://www.apache.org/licenses/LICENSE-2.0
marcozecchini 0:9fca2b23d0ba 16 *
marcozecchini 0:9fca2b23d0ba 17 * Unless required by applicable law or agreed to in writing, software
marcozecchini 0:9fca2b23d0ba 18 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
marcozecchini 0:9fca2b23d0ba 19 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
marcozecchini 0:9fca2b23d0ba 20 * See the License for the specific language governing permissions and
marcozecchini 0:9fca2b23d0ba 21 * limitations under the License.
marcozecchini 0:9fca2b23d0ba 22 *
marcozecchini 0:9fca2b23d0ba 23 * This file is part of mbed TLS (https://tls.mbed.org)
marcozecchini 0:9fca2b23d0ba 24 */
marcozecchini 0:9fca2b23d0ba 25
marcozecchini 0:9fca2b23d0ba 26 #include "mbedtls/pkcs11.h"
marcozecchini 0:9fca2b23d0ba 27
marcozecchini 0:9fca2b23d0ba 28 #if defined(MBEDTLS_PKCS11_C)
marcozecchini 0:9fca2b23d0ba 29
marcozecchini 0:9fca2b23d0ba 30 #include "mbedtls/md.h"
marcozecchini 0:9fca2b23d0ba 31 #include "mbedtls/oid.h"
marcozecchini 0:9fca2b23d0ba 32 #include "mbedtls/x509_crt.h"
marcozecchini 0:9fca2b23d0ba 33
marcozecchini 0:9fca2b23d0ba 34 #if defined(MBEDTLS_PLATFORM_C)
marcozecchini 0:9fca2b23d0ba 35 #include "mbedtls/platform.h"
marcozecchini 0:9fca2b23d0ba 36 #else
marcozecchini 0:9fca2b23d0ba 37 #include <stdlib.h>
marcozecchini 0:9fca2b23d0ba 38 #define mbedtls_calloc calloc
marcozecchini 0:9fca2b23d0ba 39 #define mbedtls_free free
marcozecchini 0:9fca2b23d0ba 40 #endif
marcozecchini 0:9fca2b23d0ba 41
marcozecchini 0:9fca2b23d0ba 42 #include <string.h>
marcozecchini 0:9fca2b23d0ba 43
marcozecchini 0:9fca2b23d0ba 44 void mbedtls_pkcs11_init( mbedtls_pkcs11_context *ctx )
marcozecchini 0:9fca2b23d0ba 45 {
marcozecchini 0:9fca2b23d0ba 46 memset( ctx, 0, sizeof( mbedtls_pkcs11_context ) );
marcozecchini 0:9fca2b23d0ba 47 }
marcozecchini 0:9fca2b23d0ba 48
marcozecchini 0:9fca2b23d0ba 49 int mbedtls_pkcs11_x509_cert_bind( mbedtls_x509_crt *cert, pkcs11h_certificate_t pkcs11_cert )
marcozecchini 0:9fca2b23d0ba 50 {
marcozecchini 0:9fca2b23d0ba 51 int ret = 1;
marcozecchini 0:9fca2b23d0ba 52 unsigned char *cert_blob = NULL;
marcozecchini 0:9fca2b23d0ba 53 size_t cert_blob_size = 0;
marcozecchini 0:9fca2b23d0ba 54
marcozecchini 0:9fca2b23d0ba 55 if( cert == NULL )
marcozecchini 0:9fca2b23d0ba 56 {
marcozecchini 0:9fca2b23d0ba 57 ret = 2;
marcozecchini 0:9fca2b23d0ba 58 goto cleanup;
marcozecchini 0:9fca2b23d0ba 59 }
marcozecchini 0:9fca2b23d0ba 60
marcozecchini 0:9fca2b23d0ba 61 if( pkcs11h_certificate_getCertificateBlob( pkcs11_cert, NULL,
marcozecchini 0:9fca2b23d0ba 62 &cert_blob_size ) != CKR_OK )
marcozecchini 0:9fca2b23d0ba 63 {
marcozecchini 0:9fca2b23d0ba 64 ret = 3;
marcozecchini 0:9fca2b23d0ba 65 goto cleanup;
marcozecchini 0:9fca2b23d0ba 66 }
marcozecchini 0:9fca2b23d0ba 67
marcozecchini 0:9fca2b23d0ba 68 cert_blob = mbedtls_calloc( 1, cert_blob_size );
marcozecchini 0:9fca2b23d0ba 69 if( NULL == cert_blob )
marcozecchini 0:9fca2b23d0ba 70 {
marcozecchini 0:9fca2b23d0ba 71 ret = 4;
marcozecchini 0:9fca2b23d0ba 72 goto cleanup;
marcozecchini 0:9fca2b23d0ba 73 }
marcozecchini 0:9fca2b23d0ba 74
marcozecchini 0:9fca2b23d0ba 75 if( pkcs11h_certificate_getCertificateBlob( pkcs11_cert, cert_blob,
marcozecchini 0:9fca2b23d0ba 76 &cert_blob_size ) != CKR_OK )
marcozecchini 0:9fca2b23d0ba 77 {
marcozecchini 0:9fca2b23d0ba 78 ret = 5;
marcozecchini 0:9fca2b23d0ba 79 goto cleanup;
marcozecchini 0:9fca2b23d0ba 80 }
marcozecchini 0:9fca2b23d0ba 81
marcozecchini 0:9fca2b23d0ba 82 if( 0 != mbedtls_x509_crt_parse( cert, cert_blob, cert_blob_size ) )
marcozecchini 0:9fca2b23d0ba 83 {
marcozecchini 0:9fca2b23d0ba 84 ret = 6;
marcozecchini 0:9fca2b23d0ba 85 goto cleanup;
marcozecchini 0:9fca2b23d0ba 86 }
marcozecchini 0:9fca2b23d0ba 87
marcozecchini 0:9fca2b23d0ba 88 ret = 0;
marcozecchini 0:9fca2b23d0ba 89
marcozecchini 0:9fca2b23d0ba 90 cleanup:
marcozecchini 0:9fca2b23d0ba 91 if( NULL != cert_blob )
marcozecchini 0:9fca2b23d0ba 92 mbedtls_free( cert_blob );
marcozecchini 0:9fca2b23d0ba 93
marcozecchini 0:9fca2b23d0ba 94 return( ret );
marcozecchini 0:9fca2b23d0ba 95 }
marcozecchini 0:9fca2b23d0ba 96
marcozecchini 0:9fca2b23d0ba 97
marcozecchini 0:9fca2b23d0ba 98 int mbedtls_pkcs11_priv_key_bind( mbedtls_pkcs11_context *priv_key,
marcozecchini 0:9fca2b23d0ba 99 pkcs11h_certificate_t pkcs11_cert )
marcozecchini 0:9fca2b23d0ba 100 {
marcozecchini 0:9fca2b23d0ba 101 int ret = 1;
marcozecchini 0:9fca2b23d0ba 102 mbedtls_x509_crt cert;
marcozecchini 0:9fca2b23d0ba 103
marcozecchini 0:9fca2b23d0ba 104 mbedtls_x509_crt_init( &cert );
marcozecchini 0:9fca2b23d0ba 105
marcozecchini 0:9fca2b23d0ba 106 if( priv_key == NULL )
marcozecchini 0:9fca2b23d0ba 107 goto cleanup;
marcozecchini 0:9fca2b23d0ba 108
marcozecchini 0:9fca2b23d0ba 109 if( 0 != mbedtls_pkcs11_x509_cert_bind( &cert, pkcs11_cert ) )
marcozecchini 0:9fca2b23d0ba 110 goto cleanup;
marcozecchini 0:9fca2b23d0ba 111
marcozecchini 0:9fca2b23d0ba 112 priv_key->len = mbedtls_pk_get_len( &cert.pk );
marcozecchini 0:9fca2b23d0ba 113 priv_key->pkcs11h_cert = pkcs11_cert;
marcozecchini 0:9fca2b23d0ba 114
marcozecchini 0:9fca2b23d0ba 115 ret = 0;
marcozecchini 0:9fca2b23d0ba 116
marcozecchini 0:9fca2b23d0ba 117 cleanup:
marcozecchini 0:9fca2b23d0ba 118 mbedtls_x509_crt_free( &cert );
marcozecchini 0:9fca2b23d0ba 119
marcozecchini 0:9fca2b23d0ba 120 return( ret );
marcozecchini 0:9fca2b23d0ba 121 }
marcozecchini 0:9fca2b23d0ba 122
marcozecchini 0:9fca2b23d0ba 123 void mbedtls_pkcs11_priv_key_free( mbedtls_pkcs11_context *priv_key )
marcozecchini 0:9fca2b23d0ba 124 {
marcozecchini 0:9fca2b23d0ba 125 if( NULL != priv_key )
marcozecchini 0:9fca2b23d0ba 126 pkcs11h_certificate_freeCertificate( priv_key->pkcs11h_cert );
marcozecchini 0:9fca2b23d0ba 127 }
marcozecchini 0:9fca2b23d0ba 128
marcozecchini 0:9fca2b23d0ba 129 int mbedtls_pkcs11_decrypt( mbedtls_pkcs11_context *ctx,
marcozecchini 0:9fca2b23d0ba 130 int mode, size_t *olen,
marcozecchini 0:9fca2b23d0ba 131 const unsigned char *input,
marcozecchini 0:9fca2b23d0ba 132 unsigned char *output,
marcozecchini 0:9fca2b23d0ba 133 size_t output_max_len )
marcozecchini 0:9fca2b23d0ba 134 {
marcozecchini 0:9fca2b23d0ba 135 size_t input_len, output_len;
marcozecchini 0:9fca2b23d0ba 136
marcozecchini 0:9fca2b23d0ba 137 if( NULL == ctx )
marcozecchini 0:9fca2b23d0ba 138 return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
marcozecchini 0:9fca2b23d0ba 139
marcozecchini 0:9fca2b23d0ba 140 if( MBEDTLS_RSA_PRIVATE != mode )
marcozecchini 0:9fca2b23d0ba 141 return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
marcozecchini 0:9fca2b23d0ba 142
marcozecchini 0:9fca2b23d0ba 143 output_len = input_len = ctx->len;
marcozecchini 0:9fca2b23d0ba 144
marcozecchini 0:9fca2b23d0ba 145 if( input_len < 16 || input_len > output_max_len )
marcozecchini 0:9fca2b23d0ba 146 return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
marcozecchini 0:9fca2b23d0ba 147
marcozecchini 0:9fca2b23d0ba 148 /* Determine size of output buffer */
marcozecchini 0:9fca2b23d0ba 149 if( pkcs11h_certificate_decryptAny( ctx->pkcs11h_cert, CKM_RSA_PKCS, input,
marcozecchini 0:9fca2b23d0ba 150 input_len, NULL, &output_len ) != CKR_OK )
marcozecchini 0:9fca2b23d0ba 151 {
marcozecchini 0:9fca2b23d0ba 152 return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
marcozecchini 0:9fca2b23d0ba 153 }
marcozecchini 0:9fca2b23d0ba 154
marcozecchini 0:9fca2b23d0ba 155 if( output_len > output_max_len )
marcozecchini 0:9fca2b23d0ba 156 return( MBEDTLS_ERR_RSA_OUTPUT_TOO_LARGE );
marcozecchini 0:9fca2b23d0ba 157
marcozecchini 0:9fca2b23d0ba 158 if( pkcs11h_certificate_decryptAny( ctx->pkcs11h_cert, CKM_RSA_PKCS, input,
marcozecchini 0:9fca2b23d0ba 159 input_len, output, &output_len ) != CKR_OK )
marcozecchini 0:9fca2b23d0ba 160 {
marcozecchini 0:9fca2b23d0ba 161 return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
marcozecchini 0:9fca2b23d0ba 162 }
marcozecchini 0:9fca2b23d0ba 163 *olen = output_len;
marcozecchini 0:9fca2b23d0ba 164 return( 0 );
marcozecchini 0:9fca2b23d0ba 165 }
marcozecchini 0:9fca2b23d0ba 166
marcozecchini 0:9fca2b23d0ba 167 int mbedtls_pkcs11_sign( mbedtls_pkcs11_context *ctx,
marcozecchini 0:9fca2b23d0ba 168 int mode,
marcozecchini 0:9fca2b23d0ba 169 mbedtls_md_type_t md_alg,
marcozecchini 0:9fca2b23d0ba 170 unsigned int hashlen,
marcozecchini 0:9fca2b23d0ba 171 const unsigned char *hash,
marcozecchini 0:9fca2b23d0ba 172 unsigned char *sig )
marcozecchini 0:9fca2b23d0ba 173 {
marcozecchini 0:9fca2b23d0ba 174 size_t sig_len = 0, asn_len = 0, oid_size = 0;
marcozecchini 0:9fca2b23d0ba 175 unsigned char *p = sig;
marcozecchini 0:9fca2b23d0ba 176 const char *oid;
marcozecchini 0:9fca2b23d0ba 177
marcozecchini 0:9fca2b23d0ba 178 if( NULL == ctx )
marcozecchini 0:9fca2b23d0ba 179 return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
marcozecchini 0:9fca2b23d0ba 180
marcozecchini 0:9fca2b23d0ba 181 if( MBEDTLS_RSA_PRIVATE != mode )
marcozecchini 0:9fca2b23d0ba 182 return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
marcozecchini 0:9fca2b23d0ba 183
marcozecchini 0:9fca2b23d0ba 184 if( md_alg != MBEDTLS_MD_NONE )
marcozecchini 0:9fca2b23d0ba 185 {
marcozecchini 0:9fca2b23d0ba 186 const mbedtls_md_info_t *md_info = mbedtls_md_info_from_type( md_alg );
marcozecchini 0:9fca2b23d0ba 187 if( md_info == NULL )
marcozecchini 0:9fca2b23d0ba 188 return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
marcozecchini 0:9fca2b23d0ba 189
marcozecchini 0:9fca2b23d0ba 190 if( mbedtls_oid_get_oid_by_md( md_alg, &oid, &oid_size ) != 0 )
marcozecchini 0:9fca2b23d0ba 191 return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
marcozecchini 0:9fca2b23d0ba 192
marcozecchini 0:9fca2b23d0ba 193 hashlen = mbedtls_md_get_size( md_info );
marcozecchini 0:9fca2b23d0ba 194 asn_len = 10 + oid_size;
marcozecchini 0:9fca2b23d0ba 195 }
marcozecchini 0:9fca2b23d0ba 196
marcozecchini 0:9fca2b23d0ba 197 sig_len = ctx->len;
marcozecchini 0:9fca2b23d0ba 198 if( hashlen > sig_len || asn_len > sig_len ||
marcozecchini 0:9fca2b23d0ba 199 hashlen + asn_len > sig_len )
marcozecchini 0:9fca2b23d0ba 200 {
marcozecchini 0:9fca2b23d0ba 201 return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
marcozecchini 0:9fca2b23d0ba 202 }
marcozecchini 0:9fca2b23d0ba 203
marcozecchini 0:9fca2b23d0ba 204 if( md_alg != MBEDTLS_MD_NONE )
marcozecchini 0:9fca2b23d0ba 205 {
marcozecchini 0:9fca2b23d0ba 206 /*
marcozecchini 0:9fca2b23d0ba 207 * DigestInfo ::= SEQUENCE {
marcozecchini 0:9fca2b23d0ba 208 * digestAlgorithm DigestAlgorithmIdentifier,
marcozecchini 0:9fca2b23d0ba 209 * digest Digest }
marcozecchini 0:9fca2b23d0ba 210 *
marcozecchini 0:9fca2b23d0ba 211 * DigestAlgorithmIdentifier ::= AlgorithmIdentifier
marcozecchini 0:9fca2b23d0ba 212 *
marcozecchini 0:9fca2b23d0ba 213 * Digest ::= OCTET STRING
marcozecchini 0:9fca2b23d0ba 214 */
marcozecchini 0:9fca2b23d0ba 215 *p++ = MBEDTLS_ASN1_SEQUENCE | MBEDTLS_ASN1_CONSTRUCTED;
marcozecchini 0:9fca2b23d0ba 216 *p++ = (unsigned char) ( 0x08 + oid_size + hashlen );
marcozecchini 0:9fca2b23d0ba 217 *p++ = MBEDTLS_ASN1_SEQUENCE | MBEDTLS_ASN1_CONSTRUCTED;
marcozecchini 0:9fca2b23d0ba 218 *p++ = (unsigned char) ( 0x04 + oid_size );
marcozecchini 0:9fca2b23d0ba 219 *p++ = MBEDTLS_ASN1_OID;
marcozecchini 0:9fca2b23d0ba 220 *p++ = oid_size & 0xFF;
marcozecchini 0:9fca2b23d0ba 221 memcpy( p, oid, oid_size );
marcozecchini 0:9fca2b23d0ba 222 p += oid_size;
marcozecchini 0:9fca2b23d0ba 223 *p++ = MBEDTLS_ASN1_NULL;
marcozecchini 0:9fca2b23d0ba 224 *p++ = 0x00;
marcozecchini 0:9fca2b23d0ba 225 *p++ = MBEDTLS_ASN1_OCTET_STRING;
marcozecchini 0:9fca2b23d0ba 226 *p++ = hashlen;
marcozecchini 0:9fca2b23d0ba 227 }
marcozecchini 0:9fca2b23d0ba 228
marcozecchini 0:9fca2b23d0ba 229 memcpy( p, hash, hashlen );
marcozecchini 0:9fca2b23d0ba 230
marcozecchini 0:9fca2b23d0ba 231 if( pkcs11h_certificate_signAny( ctx->pkcs11h_cert, CKM_RSA_PKCS, sig,
marcozecchini 0:9fca2b23d0ba 232 asn_len + hashlen, sig, &sig_len ) != CKR_OK )
marcozecchini 0:9fca2b23d0ba 233 {
marcozecchini 0:9fca2b23d0ba 234 return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
marcozecchini 0:9fca2b23d0ba 235 }
marcozecchini 0:9fca2b23d0ba 236
marcozecchini 0:9fca2b23d0ba 237 return( 0 );
marcozecchini 0:9fca2b23d0ba 238 }
marcozecchini 0:9fca2b23d0ba 239
marcozecchini 0:9fca2b23d0ba 240 #endif /* defined(MBEDTLS_PKCS11_C) */