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 for to generate a padded hash suitable for generating
6 * PKCS#1.5 signatures.
7 */
8
9
10 #include <stdio.h>
11 #include <stdlib.h>
12
13 #include "file_keys.h"
14 #include "host_common.h"
15 #include "padding.h"
16 #include "signature_digest.h"
17
18
main(int argc,char * argv[])19 int main(int argc, char* argv[]) {
20 int algorithm = -1;
21 int error_code = 0;
22 uint8_t* digest = NULL;
23 uint8_t* padded_digest = NULL;
24 uint64_t len;
25 uint32_t padded_digest_len;
26
27 if (argc != 3) {
28 fprintf(stderr, "Usage: %s <alg_id> <digest_file>", argv[0]);
29 return -1;
30 }
31 algorithm = atoi(argv[1]);
32 if (algorithm < 0 || algorithm >= kNumAlgorithms) {
33 fprintf(stderr, "Invalid Algorithm!\n");
34 return -1;
35 }
36
37 digest = BufferFromFile(argv[2], &len);
38 if (!digest) {
39 fprintf(stderr, "Could not read file: %s\n", argv[2]);
40 return -1;
41 }
42
43 padded_digest = PrependDigestInfo(algorithm, digest);
44 padded_digest_len = (hash_size_map[algorithm] +
45 digestinfo_size_map[algorithm]);
46
47 if (!padded_digest)
48 error_code = -1;
49 if(padded_digest &&
50 1 != fwrite(padded_digest, padded_digest_len, 1, stdout))
51 error_code = -1;
52 free(padded_digest);
53 free(digest);
54 return error_code;
55 }
56