1 /* $OpenBSD: dsaparam.c,v 1.10 2018/02/07 05:47:55 jsing Exp $ */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to. The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
26 * 1. Redistributions of source code must retain the copyright
27 * notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in the
30 * documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 * must display the following acknowledgement:
33 * "This product includes cryptographic software written by
34 * Eric Young (eay@cryptsoft.com)"
35 * The word 'cryptographic' can be left out if the rouines from the library
36 * being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 * the apps directory (application code) you must include an acknowledgement:
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed. i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
59 #include <openssl/opensslconf.h> /* for OPENSSL_NO_DSA */
61 /* Until the key-gen callbacks are modified to use newer prototypes, we allow
62 * deprecated functions for openssl-internal code */
63 #ifdef OPENSSL_NO_DEPRECATED
64 #undef OPENSSL_NO_DEPRECATED
75 #include <openssl/bio.h>
76 #include <openssl/bn.h>
77 #include <openssl/err.h>
78 #include <openssl/dsa.h>
79 #include <openssl/pem.h>
80 #include <openssl/x509.h>
93 static struct option dsaparam_options[] = {
96 .desc = "Convert DSA parameters into C code",
98 .opt.flag = &dsaparam_config.C,
102 .desc = "Generate a DSA key",
104 .opt.flag = &dsaparam_config.genkey,
109 .desc = "Input file (default stdin)",
111 .opt.arg = &dsaparam_config.infile,
116 .desc = "Input format (DER or PEM (default))",
117 .type = OPTION_ARG_FORMAT,
118 .opt.value = &dsaparam_config.informat,
124 .opt.flag = &dsaparam_config.noout,
129 .desc = "Output file (default stdout)",
131 .opt.arg = &dsaparam_config.outfile,
136 .desc = "Output format (DER or PEM (default))",
137 .type = OPTION_ARG_FORMAT,
138 .opt.value = &dsaparam_config.outformat,
142 .desc = "Print as text",
144 .opt.flag = &dsaparam_config.text,
153 "usage: dsaparam [-C] [-genkey] [-in file]\n"
154 " [-inform format] [-noout] [-out file] [-outform format]\n"
155 " [-text] [numbits]\n\n");
156 options_usage(dsaparam_options);
159 static int dsa_cb(int p, int n, BN_GENCB * cb);
162 dsaparam_main(int argc, char **argv)
166 BIO *in = NULL, *out = NULL;
169 char *strbits = NULL;
171 if (single_execution) {
172 if (pledge("stdio cpath wpath rpath", NULL) == -1) {
178 memset(&dsaparam_config, 0, sizeof(dsaparam_config));
180 dsaparam_config.informat = FORMAT_PEM;
181 dsaparam_config.outformat = FORMAT_PEM;
183 if (options_parse(argc, argv, dsaparam_options, &strbits, NULL) != 0) {
188 if (strbits != NULL) {
190 numbits = strtonum(strbits, 0, INT_MAX, &errstr);
192 fprintf(stderr, "Invalid number of bits: %s", errstr);
197 in = BIO_new(BIO_s_file());
198 out = BIO_new(BIO_s_file());
199 if (in == NULL || out == NULL) {
200 ERR_print_errors(bio_err);
203 if (dsaparam_config.infile == NULL)
204 BIO_set_fp(in, stdin, BIO_NOCLOSE);
206 if (BIO_read_filename(in, dsaparam_config.infile) <= 0) {
207 perror(dsaparam_config.infile);
211 if (dsaparam_config.outfile == NULL) {
212 BIO_set_fp(out, stdout, BIO_NOCLOSE);
214 if (BIO_write_filename(out, dsaparam_config.outfile) <= 0) {
215 perror(dsaparam_config.outfile);
222 BN_GENCB_set(&cb, dsa_cb, bio_err);
225 BIO_printf(bio_err, "Error allocating DSA object\n");
228 BIO_printf(bio_err, "Generating DSA parameters, %d bit long prime\n", numbits);
229 BIO_printf(bio_err, "This could take some time\n");
230 if (!DSA_generate_parameters_ex(dsa, numbits, NULL, 0, NULL, NULL, &cb)) {
231 ERR_print_errors(bio_err);
232 BIO_printf(bio_err, "Error, DSA key generation failed\n");
235 } else if (dsaparam_config.informat == FORMAT_ASN1)
236 dsa = d2i_DSAparams_bio(in, NULL);
237 else if (dsaparam_config.informat == FORMAT_PEM)
238 dsa = PEM_read_bio_DSAparams(in, NULL, NULL, NULL);
240 BIO_printf(bio_err, "bad input format specified\n");
244 BIO_printf(bio_err, "unable to load DSA parameters\n");
245 ERR_print_errors(bio_err);
248 if (dsaparam_config.text) {
249 DSAparams_print(out, dsa);
251 if (dsaparam_config.C) {
255 len = BN_num_bytes(dsa->p);
256 bits_p = BN_num_bits(dsa->p);
257 data = malloc(len + 20);
262 l = BN_bn2bin(dsa->p, data);
263 printf("static unsigned char dsa%d_p[] = {", bits_p);
264 for (i = 0; i < l; i++) {
267 printf("0x%02X, ", data[i]);
271 l = BN_bn2bin(dsa->q, data);
272 printf("static unsigned char dsa%d_q[] = {", bits_p);
273 for (i = 0; i < l; i++) {
276 printf("0x%02X, ", data[i]);
280 l = BN_bn2bin(dsa->g, data);
281 printf("static unsigned char dsa%d_g[] = {", bits_p);
282 for (i = 0; i < l; i++) {
285 printf("0x%02X, ", data[i]);
288 printf("\n\t};\n\n");
290 printf("DSA *get_dsa%d()\n\t{\n", bits_p);
291 printf("\tDSA *dsa;\n\n");
292 printf("\tif ((dsa = DSA_new()) == NULL) return(NULL);\n");
293 printf("\tdsa->p = BN_bin2bn(dsa%d_p, sizeof(dsa%d_p), NULL);\n",
295 printf("\tdsa->q = BN_bin2bn(dsa%d_q, sizeof(dsa%d_q), NULL);\n",
297 printf("\tdsa->g = BN_bin2bn(dsa%d_g, sizeof(dsa%d_g), NULL);\n",
299 printf("\tif ((dsa->p == NULL) || (dsa->q == NULL) || (dsa->g == NULL))\n");
300 printf("\t\t{ DSA_free(dsa); return(NULL); }\n");
301 printf("\treturn(dsa);\n\t}\n");
303 if (!dsaparam_config.noout) {
304 if (dsaparam_config.outformat == FORMAT_ASN1)
305 i = i2d_DSAparams_bio(out, dsa);
306 else if (dsaparam_config.outformat == FORMAT_PEM)
307 i = PEM_write_bio_DSAparams(out, dsa);
309 BIO_printf(bio_err, "bad output format specified for outfile\n");
313 BIO_printf(bio_err, "unable to write DSA parameters\n");
314 ERR_print_errors(bio_err);
318 if (dsaparam_config.genkey) {
321 if ((dsakey = DSAparams_dup(dsa)) == NULL)
323 if (!DSA_generate_key(dsakey)) {
324 ERR_print_errors(bio_err);
328 if (dsaparam_config.outformat == FORMAT_ASN1)
329 i = i2d_DSAPrivateKey_bio(out, dsakey);
330 else if (dsaparam_config.outformat == FORMAT_PEM)
331 i = PEM_write_bio_DSAPrivateKey(out, dsakey, NULL, NULL, 0, NULL, NULL);
333 BIO_printf(bio_err, "bad output format specified for outfile\n");
350 dsa_cb(int p, int n, BN_GENCB * cb)
362 BIO_write(cb->arg, &c, 1);
363 (void) BIO_flush(cb->arg);
365 if (stop_keygen_flag)