2 * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the OpenSSL license (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
10 #include <openssl/opensslconf.h>
12 NON_EMPTY_TRANSLATION_UNIT
17 # include <sys/types.h>
18 # include <sys/stat.h>
20 # include <openssl/bio.h>
21 # include <openssl/err.h>
22 # include <openssl/bn.h>
23 # include <openssl/dsa.h>
24 # include <openssl/x509.h>
25 # include <openssl/pem.h>
27 typedef enum OPTION_choice {
28 OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
29 OPT_OUT, OPT_PASSOUT, OPT_ENGINE, OPT_RAND, OPT_CIPHER
32 OPTIONS gendsa_options[] = {
33 {OPT_HELP_STR, 1, '-', "Usage: %s [args] dsaparam-file\n"},
34 {OPT_HELP_STR, 1, '-', "Valid options are:\n"},
35 {"help", OPT_HELP, '-', "Display this summary"},
36 {"out", OPT_OUT, '>', "Output the key to the specified file"},
37 {"passout", OPT_PASSOUT, 's', "Output file pass phrase source"},
38 {"rand", OPT_RAND, 's',
39 "Load the file(s) into the random number generator"},
40 {"", OPT_CIPHER, '-', "Encrypt the output with any supported cipher"},
41 # ifndef OPENSSL_NO_ENGINE
42 {"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"},
47 int gendsa_main(int argc, char **argv)
49 BIO *out = NULL, *in = NULL;
51 const EVP_CIPHER *enc = NULL;
52 char *inrand = NULL, *dsaparams = NULL;
53 char *outfile = NULL, *passoutarg = NULL, *passout = NULL, *prog;
55 int ret = 1, private = 0;
56 const BIGNUM *p = NULL;
58 prog = opt_init(argc, argv, gendsa_options);
59 while ((o = opt_next()) != OPT_EOF) {
64 BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
68 opt_help(gendsa_options);
74 passoutarg = opt_arg();
77 (void)setup_engine(opt_arg(), 0);
83 if (!opt_cipher(opt_unknown(), &enc))
88 argc = opt_num_rest();
96 if (!app_passwd(NULL, passoutarg, NULL, &passout)) {
97 BIO_printf(bio_err, "Error getting password\n");
101 in = bio_open_default(dsaparams, 'r', FORMAT_PEM);
105 if ((dsa = PEM_read_bio_DSAparams(in, NULL, NULL, NULL)) == NULL) {
106 BIO_printf(bio_err, "unable to load DSA parameter file\n");
112 out = bio_open_owner(outfile, FORMAT_PEM, private);
116 if (!app_RAND_load_file(NULL, 1) && inrand == NULL) {
118 "warning, not much extra random data, consider using the -rand option\n");
121 BIO_printf(bio_err, "%ld semi-random bytes loaded\n",
122 app_RAND_load_files(inrand));
124 DSA_get0_pqg(dsa, &p, NULL, NULL);
125 BIO_printf(bio_err, "Generating DSA key, %d bits\n", BN_num_bits(p));
126 if (!DSA_generate_key(dsa))
129 app_RAND_write_file(NULL);
132 if (!PEM_write_bio_DSAPrivateKey(out, dsa, enc, NULL, 0, NULL, passout))
137 ERR_print_errors(bio_err);
142 OPENSSL_free(passout);