blob: bf23ebd52b2aa3891c760808fb257c5c3558c760 [file] [log] [blame]
/* Copyright (c) 2010 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 "file_keys.h"
#include "padding.h"
#include "signature_digest.h"
#include "utility.h"
int main(int argc, char* argv[]) {
int algorithm = -1;
int error_code = 0;
uint8_t* buf = NULL;
uint8_t* signature_digest = NULL;
uint64_t len;
uint32_t signature_digest_len;
if (argc != 3) {
fprintf(stderr, "Usage: %s <alg_id> <file>", argv[0]);
return -1;
}
algorithm = atoi(argv[1]);
if (algorithm < 0 || algorithm >= kNumAlgorithms) {
fprintf(stderr, "Invalid Algorithm!\n");
return -1;
}
buf = BufferFromFile(argv[2], &len);
if (!buf) {
fprintf(stderr, "Could not read file: %s\n", argv[2]);
return -1;
}
signature_digest = SignatureDigest(buf, len, algorithm);
signature_digest_len = (hash_size_map[algorithm] +
digestinfo_size_map[algorithm]);
if (!signature_digest)
error_code = -1;
if(signature_digest &&
1 != fwrite(signature_digest, signature_digest_len, 1, stdout))
error_code = -1;
Free(signature_digest);
Free(buf);
return error_code;
}