/** | |
* \file pkcs11.c | |
* | |
* \brief Wrapper for PKCS#11 library libpkcs11-helper | |
* | |
* \author Adriaan de Jong <dejong@fox-it.com> | |
* | |
* Copyright (C) 2006-2015, ARM Limited, All Rights Reserved | |
* SPDX-License-Identifier: Apache-2.0 | |
* | |
* Licensed under the Apache License, Version 2.0 (the "License"); you may | |
* not use this file except in compliance with the License. | |
* You may obtain a copy of the License at | |
* | |
* http://www.apache.org/licenses/LICENSE-2.0 | |
* | |
* Unless required by applicable law or agreed to in writing, software | |
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT | |
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
* See the License for the specific language governing permissions and | |
* limitations under the License. | |
* | |
* This file is part of mbed TLS (https://tls.mbed.org) | |
*/ | |
#include "mbedtls/pkcs11.h" | |
#if defined(MBEDTLS_PKCS11_C) | |
#include "mbedtls/md.h" | |
#include "mbedtls/oid.h" | |
#include "mbedtls/x509_crt.h" | |
#if defined(MBEDTLS_PLATFORM_C) | |
#include "mbedtls/platform.h" | |
#else | |
#include <stdlib.h> | |
#define mbedtls_calloc calloc | |
#define mbedtls_free free | |
#endif | |
#include <string.h> | |
void mbedtls_pkcs11_init( mbedtls_pkcs11_context *ctx ) | |
{ | |
memset( ctx, 0, sizeof( mbedtls_pkcs11_context ) ); | |
} | |
int mbedtls_pkcs11_x509_cert_bind( mbedtls_x509_crt *cert, pkcs11h_certificate_t pkcs11_cert ) | |
{ | |
int ret = 1; | |
unsigned char *cert_blob = NULL; | |
size_t cert_blob_size = 0; | |
if( cert == NULL ) | |
{ | |
ret = 2; | |
goto cleanup; | |
} | |
if( pkcs11h_certificate_getCertificateBlob( pkcs11_cert, NULL, | |
&cert_blob_size ) != CKR_OK ) | |
{ | |
ret = 3; | |
goto cleanup; | |
} | |
cert_blob = mbedtls_calloc( 1, cert_blob_size ); | |
if( NULL == cert_blob ) | |
{ | |
ret = 4; | |
goto cleanup; | |
} | |
if( pkcs11h_certificate_getCertificateBlob( pkcs11_cert, cert_blob, | |
&cert_blob_size ) != CKR_OK ) | |
{ | |
ret = 5; | |
goto cleanup; | |
} | |
if( 0 != mbedtls_x509_crt_parse( cert, cert_blob, cert_blob_size ) ) | |
{ | |
ret = 6; | |
goto cleanup; | |
} | |
ret = 0; | |
cleanup: | |
if( NULL != cert_blob ) | |
mbedtls_free( cert_blob ); | |
return( ret ); | |
} | |
int mbedtls_pkcs11_priv_key_bind( mbedtls_pkcs11_context *priv_key, | |
pkcs11h_certificate_t pkcs11_cert ) | |
{ | |
int ret = 1; | |
mbedtls_x509_crt cert; | |
mbedtls_x509_crt_init( &cert ); | |
if( priv_key == NULL ) | |
goto cleanup; | |
if( 0 != mbedtls_pkcs11_x509_cert_bind( &cert, pkcs11_cert ) ) | |
goto cleanup; | |
priv_key->len = mbedtls_pk_get_len( &cert.pk ); | |
priv_key->pkcs11h_cert = pkcs11_cert; | |
ret = 0; | |
cleanup: | |
mbedtls_x509_crt_free( &cert ); | |
return( ret ); | |
} | |
void mbedtls_pkcs11_priv_key_free( mbedtls_pkcs11_context *priv_key ) | |
{ | |
if( NULL != priv_key ) | |
pkcs11h_certificate_freeCertificate( priv_key->pkcs11h_cert ); | |
} | |
int mbedtls_pkcs11_decrypt( mbedtls_pkcs11_context *ctx, | |
int mode, size_t *olen, | |
const unsigned char *input, | |
unsigned char *output, | |
size_t output_max_len ) | |
{ | |
size_t input_len, output_len; | |
if( NULL == ctx ) | |
return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA ); | |
if( MBEDTLS_RSA_PRIVATE != mode ) | |
return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA ); | |
output_len = input_len = ctx->len; | |
if( input_len < 16 || input_len > output_max_len ) | |
return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA ); | |
/* Determine size of output buffer */ | |
if( pkcs11h_certificate_decryptAny( ctx->pkcs11h_cert, CKM_RSA_PKCS, input, | |
input_len, NULL, &output_len ) != CKR_OK ) | |
{ | |
return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA ); | |
} | |
if( output_len > output_max_len ) | |
return( MBEDTLS_ERR_RSA_OUTPUT_TOO_LARGE ); | |
if( pkcs11h_certificate_decryptAny( ctx->pkcs11h_cert, CKM_RSA_PKCS, input, | |
input_len, output, &output_len ) != CKR_OK ) | |
{ | |
return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA ); | |
} | |
*olen = output_len; | |
return( 0 ); | |
} | |
int mbedtls_pkcs11_sign( mbedtls_pkcs11_context *ctx, | |
int mode, | |
mbedtls_md_type_t md_alg, | |
unsigned int hashlen, | |
const unsigned char *hash, | |
unsigned char *sig ) | |
{ | |
size_t sig_len = 0, asn_len = 0, oid_size = 0; | |
unsigned char *p = sig; | |
const char *oid; | |
if( NULL == ctx ) | |
return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA ); | |
if( MBEDTLS_RSA_PRIVATE != mode ) | |
return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA ); | |
if( md_alg != MBEDTLS_MD_NONE ) | |
{ | |
const mbedtls_md_info_t *md_info = mbedtls_md_info_from_type( md_alg ); | |
if( md_info == NULL ) | |
return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA ); | |
if( mbedtls_oid_get_oid_by_md( md_alg, &oid, &oid_size ) != 0 ) | |
return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA ); | |
hashlen = mbedtls_md_get_size( md_info ); | |
asn_len = 10 + oid_size; | |
} | |
sig_len = ctx->len; | |
if( hashlen > sig_len || asn_len > sig_len || | |
hashlen + asn_len > sig_len ) | |
{ | |
return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA ); | |
} | |
if( md_alg != MBEDTLS_MD_NONE ) | |
{ | |
/* | |
* DigestInfo ::= SEQUENCE { | |
* digestAlgorithm DigestAlgorithmIdentifier, | |
* digest Digest } | |
* | |
* DigestAlgorithmIdentifier ::= AlgorithmIdentifier | |
* | |
* Digest ::= OCTET STRING | |
*/ | |
*p++ = MBEDTLS_ASN1_SEQUENCE | MBEDTLS_ASN1_CONSTRUCTED; | |
*p++ = (unsigned char) ( 0x08 + oid_size + hashlen ); | |
*p++ = MBEDTLS_ASN1_SEQUENCE | MBEDTLS_ASN1_CONSTRUCTED; | |
*p++ = (unsigned char) ( 0x04 + oid_size ); | |
*p++ = MBEDTLS_ASN1_OID; | |
*p++ = oid_size & 0xFF; | |
memcpy( p, oid, oid_size ); | |
p += oid_size; | |
*p++ = MBEDTLS_ASN1_NULL; | |
*p++ = 0x00; | |
*p++ = MBEDTLS_ASN1_OCTET_STRING; | |
*p++ = hashlen; | |
} | |
memcpy( p, hash, hashlen ); | |
if( pkcs11h_certificate_signAny( ctx->pkcs11h_cert, CKM_RSA_PKCS, sig, | |
asn_len + hashlen, sig, &sig_len ) != CKR_OK ) | |
{ | |
return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA ); | |
} | |
return( 0 ); | |
} | |
#endif /* defined(MBEDTLS_PKCS11_C) */ |