godot/thirdparty/mbedtls/library/pkcs11.c

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/**
* \file pkcs11.c
*
* \brief Wrapper for PKCS#11 library libpkcs11-helper
*
* \author Adriaan de Jong <dejong@fox-it.com>
*
* Copyright The Mbed TLS Contributors
* 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.
*/
#include "mbedtls/pkcs11.h"
#if defined(MBEDTLS_PKCS11_C)
#include "mbedtls/md.h"
#include "mbedtls/oid.h"
#include "mbedtls/x509_crt.h"
#include "mbedtls/platform.h"
#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) */