128 lines
3.5 KiB
C
128 lines
3.5 KiB
C
/*
|
|
* Public key-based signature verification program
|
|
*
|
|
* 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/build_info.h"
|
|
|
|
#include "mbedtls/platform.h"
|
|
/* md.h is included this early since MD_CAN_XXX macros are defined there. */
|
|
#include "mbedtls/md.h"
|
|
|
|
#if !defined(MBEDTLS_BIGNUM_C) || !defined(MBEDTLS_MD_C) || \
|
|
!defined(MBEDTLS_MD_CAN_SHA256) || !defined(MBEDTLS_PK_PARSE_C) || \
|
|
!defined(MBEDTLS_FS_IO)
|
|
int main(void)
|
|
{
|
|
mbedtls_printf("MBEDTLS_BIGNUM_C and/or MBEDTLS_MD_C and/or "
|
|
"MBEDTLS_MD_CAN_SHA256 and/or MBEDTLS_PK_PARSE_C and/or "
|
|
"MBEDTLS_FS_IO not defined.\n");
|
|
mbedtls_exit(0);
|
|
}
|
|
#else
|
|
|
|
#include "mbedtls/error.h"
|
|
#include "mbedtls/pk.h"
|
|
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
|
|
|
|
int main(int argc, char *argv[])
|
|
{
|
|
FILE *f;
|
|
int ret = 1;
|
|
int exit_code = MBEDTLS_EXIT_FAILURE;
|
|
size_t i;
|
|
mbedtls_pk_context pk;
|
|
unsigned char hash[32];
|
|
unsigned char buf[MBEDTLS_PK_SIGNATURE_MAX_SIZE];
|
|
char filename[512];
|
|
|
|
mbedtls_pk_init(&pk);
|
|
|
|
if (argc != 3) {
|
|
mbedtls_printf("usage: mbedtls_pk_verify <key_file> <filename>\n");
|
|
|
|
#if defined(_WIN32)
|
|
mbedtls_printf("\n");
|
|
#endif
|
|
|
|
goto exit;
|
|
}
|
|
|
|
mbedtls_printf("\n . Reading public key from '%s'", argv[1]);
|
|
fflush(stdout);
|
|
|
|
if ((ret = mbedtls_pk_parse_public_keyfile(&pk, argv[1])) != 0) {
|
|
mbedtls_printf(" failed\n ! mbedtls_pk_parse_public_keyfile returned -0x%04x\n",
|
|
(unsigned int) -ret);
|
|
goto exit;
|
|
}
|
|
|
|
/*
|
|
* Extract the signature from the file
|
|
*/
|
|
mbedtls_snprintf(filename, sizeof(filename), "%s.sig", argv[2]);
|
|
|
|
if ((f = fopen(filename, "rb")) == NULL) {
|
|
mbedtls_printf("\n ! Could not open %s\n\n", filename);
|
|
goto exit;
|
|
}
|
|
|
|
i = fread(buf, 1, sizeof(buf), f);
|
|
|
|
fclose(f);
|
|
|
|
/*
|
|
* Compute the SHA-256 hash of the input file and
|
|
* verify the signature
|
|
*/
|
|
mbedtls_printf("\n . Verifying the SHA-256 signature");
|
|
fflush(stdout);
|
|
|
|
if ((ret = mbedtls_md_file(
|
|
mbedtls_md_info_from_type(MBEDTLS_MD_SHA256),
|
|
argv[2], hash)) != 0) {
|
|
mbedtls_printf(" failed\n ! Could not open or read %s\n\n", argv[2]);
|
|
goto exit;
|
|
}
|
|
|
|
if ((ret = mbedtls_pk_verify(&pk, MBEDTLS_MD_SHA256, hash, 0,
|
|
buf, i)) != 0) {
|
|
mbedtls_printf(" failed\n ! mbedtls_pk_verify returned -0x%04x\n", (unsigned int) -ret);
|
|
goto exit;
|
|
}
|
|
|
|
mbedtls_printf("\n . OK (the signature is valid)\n\n");
|
|
|
|
exit_code = MBEDTLS_EXIT_SUCCESS;
|
|
|
|
exit:
|
|
mbedtls_pk_free(&pk);
|
|
|
|
#if defined(MBEDTLS_ERROR_C)
|
|
if (exit_code != MBEDTLS_EXIT_SUCCESS) {
|
|
mbedtls_strerror(ret, (char *) buf, sizeof(buf));
|
|
mbedtls_printf(" ! Last error was: %s\n", buf);
|
|
}
|
|
#endif
|
|
|
|
mbedtls_exit(exit_code);
|
|
}
|
|
#endif /* MBEDTLS_BIGNUM_C && MBEDTLS_MD_CAN_SHA256 &&
|
|
MBEDTLS_PK_PARSE_C && MBEDTLS_FS_IO */
|