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/* Copyright (c) 2011 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*
* Utility that outputs the cryptographic digest of a contents of a
* file in a format that can be directly used to generate PKCS#1 v1.5
* signatures via the "openssl" command line utility.
*/
#include <stdio.h>
#include <stdlib.h>
#include "2common.h"
#include "2sysincludes.h"
#include "host_common.h"
#include "host_signature21.h"
#include "signature_digest.h"
int main(int argc, char* argv[])
{
int error_code = -1;
uint8_t *buf = NULL;
uint8_t *signature_digest = NULL;
uint32_t len;
if (argc != 3) {
fprintf(stderr, "Usage: %s <alg_id> <file>", argv[0]);
goto cleanup;
}
int algorithm = atoi(argv[1]);
if (algorithm < 0 || algorithm >= VB2_ALG_COUNT) {
fprintf(stderr, "Invalid Algorithm!\n");
goto cleanup;
}
if (VB2_SUCCESS != vb2_read_file(argv[2], &buf, &len)) {
fprintf(stderr, "Could not read file: %s\n", argv[2]);
goto cleanup;
}
enum vb2_hash_algorithm hash_alg = vb2_crypto_to_hash(algorithm);
uint32_t digest_size = vb2_digest_size(hash_alg);
uint32_t digestinfo_size = 0;
const uint8_t *digestinfo = NULL;
if (VB2_SUCCESS != vb2_digest_info(hash_alg, &digestinfo,
&digestinfo_size))
goto cleanup;
uint32_t signature_digest_len = digest_size + digestinfo_size;
signature_digest = SignatureDigest(buf, len, algorithm);
if(signature_digest &&
fwrite(signature_digest, signature_digest_len, 1, stdout) == 1)
error_code = 0;
cleanup:
free(signature_digest);
free(buf);
return error_code;
}
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