266 lines
7.1 KiB
C
266 lines
7.1 KiB
C
/**
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* \file pkcs11.c
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*
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* \brief Wrapper for PKCS#11 library libpkcs11-helper
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*
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* \author Adriaan de Jong <dejong@fox-it.com>
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*
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* Copyright The Mbed TLS Contributors
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* SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
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*
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* This file is provided under the Apache License 2.0, or the
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* GNU General Public License v2.0 or later.
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*
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* **********
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* Apache License 2.0:
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*
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* Licensed under the Apache License, Version 2.0 (the "License"); you may
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* not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* **********
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*
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* **********
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* GNU General Public License v2.0 or later:
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* **********
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*/
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#include "mbedtls/pkcs11.h"
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#if defined(MBEDTLS_PKCS11_C)
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#include "mbedtls/md.h"
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#include "mbedtls/oid.h"
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#include "mbedtls/x509_crt.h"
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#if defined(MBEDTLS_PLATFORM_C)
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#include "mbedtls/platform.h"
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#else
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#include <stdlib.h>
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#define mbedtls_calloc calloc
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#define mbedtls_free free
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#endif
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#include <string.h>
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void mbedtls_pkcs11_init( mbedtls_pkcs11_context *ctx )
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{
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memset( ctx, 0, sizeof( mbedtls_pkcs11_context ) );
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}
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int mbedtls_pkcs11_x509_cert_bind( mbedtls_x509_crt *cert, pkcs11h_certificate_t pkcs11_cert )
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{
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int ret = 1;
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unsigned char *cert_blob = NULL;
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size_t cert_blob_size = 0;
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if( cert == NULL )
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{
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ret = 2;
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goto cleanup;
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}
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if( pkcs11h_certificate_getCertificateBlob( pkcs11_cert, NULL,
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&cert_blob_size ) != CKR_OK )
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{
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ret = 3;
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goto cleanup;
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}
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cert_blob = mbedtls_calloc( 1, cert_blob_size );
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if( NULL == cert_blob )
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{
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ret = 4;
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goto cleanup;
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}
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if( pkcs11h_certificate_getCertificateBlob( pkcs11_cert, cert_blob,
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&cert_blob_size ) != CKR_OK )
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{
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ret = 5;
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goto cleanup;
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}
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if( 0 != mbedtls_x509_crt_parse( cert, cert_blob, cert_blob_size ) )
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{
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ret = 6;
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goto cleanup;
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}
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ret = 0;
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cleanup:
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if( NULL != cert_blob )
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mbedtls_free( cert_blob );
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return( ret );
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}
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int mbedtls_pkcs11_priv_key_bind( mbedtls_pkcs11_context *priv_key,
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pkcs11h_certificate_t pkcs11_cert )
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{
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int ret = 1;
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mbedtls_x509_crt cert;
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mbedtls_x509_crt_init( &cert );
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if( priv_key == NULL )
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goto cleanup;
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if( 0 != mbedtls_pkcs11_x509_cert_bind( &cert, pkcs11_cert ) )
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goto cleanup;
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priv_key->len = mbedtls_pk_get_len( &cert.pk );
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priv_key->pkcs11h_cert = pkcs11_cert;
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ret = 0;
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cleanup:
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mbedtls_x509_crt_free( &cert );
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return( ret );
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}
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void mbedtls_pkcs11_priv_key_free( mbedtls_pkcs11_context *priv_key )
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{
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if( NULL != priv_key )
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pkcs11h_certificate_freeCertificate( priv_key->pkcs11h_cert );
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}
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int mbedtls_pkcs11_decrypt( mbedtls_pkcs11_context *ctx,
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int mode, size_t *olen,
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const unsigned char *input,
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unsigned char *output,
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size_t output_max_len )
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{
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size_t input_len, output_len;
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if( NULL == ctx )
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return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
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if( MBEDTLS_RSA_PRIVATE != mode )
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return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
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output_len = input_len = ctx->len;
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if( input_len < 16 || input_len > output_max_len )
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return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
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/* Determine size of output buffer */
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if( pkcs11h_certificate_decryptAny( ctx->pkcs11h_cert, CKM_RSA_PKCS, input,
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input_len, NULL, &output_len ) != CKR_OK )
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{
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return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
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}
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if( output_len > output_max_len )
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return( MBEDTLS_ERR_RSA_OUTPUT_TOO_LARGE );
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if( pkcs11h_certificate_decryptAny( ctx->pkcs11h_cert, CKM_RSA_PKCS, input,
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input_len, output, &output_len ) != CKR_OK )
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{
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return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
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}
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*olen = output_len;
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return( 0 );
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}
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int mbedtls_pkcs11_sign( mbedtls_pkcs11_context *ctx,
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int mode,
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mbedtls_md_type_t md_alg,
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unsigned int hashlen,
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const unsigned char *hash,
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unsigned char *sig )
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{
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size_t sig_len = 0, asn_len = 0, oid_size = 0;
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unsigned char *p = sig;
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const char *oid;
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if( NULL == ctx )
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return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
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if( MBEDTLS_RSA_PRIVATE != mode )
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return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
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if( md_alg != MBEDTLS_MD_NONE )
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{
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const mbedtls_md_info_t *md_info = mbedtls_md_info_from_type( md_alg );
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if( md_info == NULL )
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return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
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if( mbedtls_oid_get_oid_by_md( md_alg, &oid, &oid_size ) != 0 )
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return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
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hashlen = mbedtls_md_get_size( md_info );
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asn_len = 10 + oid_size;
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}
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sig_len = ctx->len;
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if( hashlen > sig_len || asn_len > sig_len ||
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hashlen + asn_len > sig_len )
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{
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return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
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}
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if( md_alg != MBEDTLS_MD_NONE )
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{
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/*
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* DigestInfo ::= SEQUENCE {
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* digestAlgorithm DigestAlgorithmIdentifier,
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* digest Digest }
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*
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* DigestAlgorithmIdentifier ::= AlgorithmIdentifier
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*
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* Digest ::= OCTET STRING
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*/
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*p++ = MBEDTLS_ASN1_SEQUENCE | MBEDTLS_ASN1_CONSTRUCTED;
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*p++ = (unsigned char) ( 0x08 + oid_size + hashlen );
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*p++ = MBEDTLS_ASN1_SEQUENCE | MBEDTLS_ASN1_CONSTRUCTED;
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*p++ = (unsigned char) ( 0x04 + oid_size );
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*p++ = MBEDTLS_ASN1_OID;
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*p++ = oid_size & 0xFF;
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memcpy( p, oid, oid_size );
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p += oid_size;
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*p++ = MBEDTLS_ASN1_NULL;
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*p++ = 0x00;
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*p++ = MBEDTLS_ASN1_OCTET_STRING;
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*p++ = hashlen;
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}
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memcpy( p, hash, hashlen );
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if( pkcs11h_certificate_signAny( ctx->pkcs11h_cert, CKM_RSA_PKCS, sig,
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asn_len + hashlen, sig, &sig_len ) != CKR_OK )
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{
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return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
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}
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return( 0 );
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}
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#endif /* defined(MBEDTLS_PKCS11_C) */
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