5 /* nettle, low-level cryptographics library
7 * Copyright (C) 2002 Niels Möller
9 * The nettle library is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU Lesser General Public License as published by
11 * the Free Software Foundation; either version 2.1 of the License, or (at your
12 * option) any later version.
14 * The nettle library is distributed in the hope that it will be useful, but
15 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
16 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
17 * License for more details.
19 * You should have received a copy of the GNU Lesser General Public License
20 * along with the nettle library; see the file COPYING.LIB. If not, write to
21 * the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
34 /* string.h must be included before gmp.h */
39 main(int argc, char **argv)
41 struct rsa_private_key key;
47 werror("Usage: rsa-sign PRIVATE-KEY < file\n");
51 rsa_private_key_init(&key);
53 if (!read_rsa_key(argv[1], NULL, &key))
55 werror("Invalid key\n");
60 if (!hash_file(&nettle_sha1, &hash, stdin))
62 werror("Failed reading stdin: %s\n",
68 if (!rsa_sha1_sign(&key, &hash, s))
70 werror("RSA key too small\n");
74 if (!mpz_out_str(stdout, 16, s))
76 werror("Failed writing signature: %s\n",
84 rsa_private_key_clear(&key);