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
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>
29 static int stop_keygen_flag = 0;
31 static void timebomb_sigalarm(int foo)
38 static int dsa_cb(int p, int n, BN_GENCB *cb);
40 typedef enum OPTION_choice {
41 OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
42 OPT_INFORM, OPT_OUTFORM, OPT_IN, OPT_OUT, OPT_TEXT, OPT_C,
43 OPT_NOOUT, OPT_GENKEY, OPT_RAND, OPT_ENGINE,
47 const OPTIONS dsaparam_options[] = {
48 {"help", OPT_HELP, '-', "Display this summary"},
49 {"inform", OPT_INFORM, 'F', "Input format - DER or PEM"},
50 {"in", OPT_IN, '<', "Input file"},
51 {"outform", OPT_OUTFORM, 'F', "Output format - DER or PEM"},
52 {"out", OPT_OUT, '>', "Output file"},
53 {"text", OPT_TEXT, '-', "Print as text"},
54 {"C", OPT_C, '-', "Output C code"},
55 {"noout", OPT_NOOUT, '-', "No output"},
56 {"genkey", OPT_GENKEY, '-', "Generate a DSA key"},
57 {"rand", OPT_RAND, 's', "Files to use for random number input"},
59 {"timebomb", OPT_TIMEBOMB, 'p', "Interrupt keygen after 'pnum' seconds"},
61 # ifndef OPENSSL_NO_ENGINE
62 {"engine", OPT_ENGINE, 's', "Use engine e, possibly a hardware device"},
67 int dsaparam_main(int argc, char **argv)
70 BIO *in = NULL, *out = NULL;
72 int numbits = -1, num = 0, genkey = 0, need_rand = 0;
73 int informat = FORMAT_PEM, outformat = FORMAT_PEM, noout = 0, C = 0;
74 int ret = 1, i, text = 0, private = 0;
78 char *infile = NULL, *outfile = NULL, *prog, *inrand = NULL;
81 prog = opt_init(argc, argv, dsaparam_options);
82 while ((o = opt_next()) != OPT_EOF) {
87 BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
90 opt_help(dsaparam_options);
94 if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &informat))
101 if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &outformat))
108 (void)setup_engine(opt_arg(), 0);
112 timebomb = atoi(opt_arg());
122 genkey = need_rand = 1;
133 argc = opt_num_rest();
137 if (!opt_int(argv[0], &num) || num < 0)
143 private = genkey ? 1 : 0;
145 in = bio_open_default(infile, 'r', informat);
148 out = bio_open_owner(outfile, outformat, private);
153 app_RAND_load_file(NULL, (inrand != NULL));
155 BIO_printf(bio_err, "%ld semi-random bytes loaded\n",
156 app_RAND_load_files(inrand));
162 BIO_printf(bio_err, "Error allocating BN_GENCB object\n");
165 BN_GENCB_set(cb, dsa_cb, bio_err);
169 BIO_printf(bio_err, "Error allocating DSA object\n");
172 BIO_printf(bio_err, "Generating DSA parameters, %d bit long prime\n",
174 BIO_printf(bio_err, "This could take some time\n");
177 struct sigaction act;
178 act.sa_handler = timebomb_sigalarm;
181 "(though I'll stop it if not done within %d secs)\n",
183 if (sigaction(SIGALRM, &act, NULL) != 0) {
184 BIO_printf(bio_err, "Error, couldn't set SIGALRM handler\n");
190 if (!DSA_generate_parameters_ex(dsa, num, NULL, 0, NULL, NULL, cb)) {
192 if (stop_keygen_flag) {
193 BIO_printf(bio_err, "DSA key generation time-stopped\n");
194 /* This is an asked-for behaviour! */
199 ERR_print_errors(bio_err);
200 BIO_printf(bio_err, "Error, DSA key generation failed\n");
203 } else if (informat == FORMAT_ASN1)
204 dsa = d2i_DSAparams_bio(in, NULL);
206 dsa = PEM_read_bio_DSAparams(in, NULL, NULL, NULL);
208 BIO_printf(bio_err, "unable to load DSA parameters\n");
209 ERR_print_errors(bio_err);
214 DSAparams_print(out, dsa);
218 const BIGNUM *p = NULL, *q = NULL, *g = NULL;
222 DSA_get0_pqg(dsa, &p, &q, &g);
223 len = BN_num_bytes(p);
224 bits_p = BN_num_bits(p);
226 data = app_malloc(len + 20, "BN space");
228 BIO_printf(bio_out, "DSA *get_dsa%d()\n{\n", bits_p);
229 print_bignum_var(bio_out, p, "dsap", len, data);
230 print_bignum_var(bio_out, q, "dsaq", len, data);
231 print_bignum_var(bio_out, g, "dsag", len, data);
232 BIO_printf(bio_out, " DSA *dsa = DSA_new();\n"
234 BIO_printf(bio_out, " if (dsa == NULL)\n"
236 BIO_printf(bio_out, " dsa->p = BN_bin2bn(dsap_%d, sizeof (dsap_%d), NULL);\n",
238 BIO_printf(bio_out, " dsa->q = BN_bin2bn(dsaq_%d, sizeof (dsaq_%d), NULL);\n",
240 BIO_printf(bio_out, " dsa->g = BN_bin2bn(dsag_%d, sizeof (dsag_%d), NULL);\n",
242 BIO_printf(bio_out, " if (!dsa->p || !dsa->q || !dsa->g) {\n"
246 " return(dsa);\n}\n");
251 if (outformat == FORMAT_ASN1)
252 i = i2d_DSAparams_bio(out, dsa);
254 i = PEM_write_bio_DSAparams(out, dsa);
256 BIO_printf(bio_err, "unable to write DSA parameters\n");
257 ERR_print_errors(bio_err);
265 if ((dsakey = DSAparams_dup(dsa)) == NULL)
267 if (!DSA_generate_key(dsakey)) {
268 ERR_print_errors(bio_err);
273 if (outformat == FORMAT_ASN1)
274 i = i2d_DSAPrivateKey_bio(out, dsakey);
276 i = PEM_write_bio_DSAPrivateKey(out, dsakey, NULL, NULL, 0, NULL,
281 app_RAND_write_file(NULL);
291 static int dsa_cb(int p, int n, BN_GENCB *cb)
303 BIO_write(BN_GENCB_get_arg(cb), &c, 1);
304 (void)BIO_flush(BN_GENCB_get_arg(cb));
306 if (stop_keygen_flag)