Diff: library/pkcs11.c

Revision:

0:cdf462088d13

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/library/pkcs11.c	Thu Jan 05 00:18:44 2017 +0000
@@ -0,0 +1,240 @@
+/**
+ * \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) */