[398] | 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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