1/* Copyright (c) 2011 The Chromium OS Authors. All rights reserved.
2 * Use of this source code is governed by a BSD-style license that can be
3 * found in the LICENSE file.
4 *
5 * Utility that outputs the cryptographic digest of a contents of a
6 * file in a format that can be directly used to generate PKCS#1 v1.5
7 * signatures via the "openssl" command line utility.
8 */
9
10
11#include <stdio.h>
12#include <stdlib.h>
13
14#include "file_keys.h"
15#include "host_common.h"
16#include "padding.h"
17#include "signature_digest.h"
18
19
20int main(int argc, char* argv[]) {
21  int algorithm = -1;
22  int error_code = 0;
23  uint8_t* buf = NULL;
24  uint8_t* signature_digest = NULL;
25  uint64_t len;
26  uint32_t signature_digest_len;
27
28  if (argc != 3) {
29    fprintf(stderr, "Usage: %s <alg_id> <file>", argv[0]);
30    return -1;
31  }
32  algorithm = atoi(argv[1]);
33  if (algorithm < 0 || algorithm >= kNumAlgorithms) {
34    fprintf(stderr, "Invalid Algorithm!\n");
35    return -1;
36  }
37
38  buf = BufferFromFile(argv[2], &len);
39  if (!buf) {
40    fprintf(stderr, "Could not read file: %s\n", argv[2]);
41    return -1;
42  }
43
44  signature_digest = SignatureDigest(buf, len, algorithm);
45  signature_digest_len = (hash_size_map[algorithm] +
46                          digestinfo_size_map[algorithm]);
47  if (!signature_digest)
48    error_code = -1;
49  if(signature_digest &&
50     1 != fwrite(signature_digest, signature_digest_len, 1, stdout))
51    error_code = -1;
52  free(signature_digest);
53  free(buf);
54  return error_code;
55}
56