| File: | src/usr.bin/openssl/dsaparam.c |
| Warning: | line 336, column 4 Value stored to 'i' is never read |
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| 1 | /* $OpenBSD: dsaparam.c,v 1.15 2023/03/06 14:32:06 tb Exp $ */ |
| 2 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
| 3 | * All rights reserved. |
| 4 | * |
| 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. |
| 8 | * |
| 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). |
| 15 | * |
| 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. |
| 22 | * |
| 23 | * Redistribution and use in source and binary forms, with or without |
| 24 | * modification, are permitted provided that the following conditions |
| 25 | * are met: |
| 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)" |
| 40 | * |
| 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 |
| 51 | * SUCH DAMAGE. |
| 52 | * |
| 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.] |
| 57 | */ |
| 58 | |
| 59 | #include <openssl/opensslconf.h> /* for OPENSSL_NO_DSA */ |
| 60 | |
| 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 |
| 65 | #endif |
| 66 | |
| 67 | #include <limits.h> |
| 68 | #include <stdio.h> |
| 69 | #include <stdlib.h> |
| 70 | #include <string.h> |
| 71 | #include <time.h> |
| 72 | |
| 73 | #include "apps.h" |
| 74 | |
| 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> |
| 81 | |
| 82 | static struct { |
| 83 | int C; |
| 84 | int genkey; |
| 85 | char *infile; |
| 86 | int informat; |
| 87 | int noout; |
| 88 | char *outfile; |
| 89 | int outformat; |
| 90 | int text; |
| 91 | } cfg; |
| 92 | |
| 93 | static const struct option dsaparam_options[] = { |
| 94 | { |
| 95 | .name = "C", |
| 96 | .desc = "Convert DSA parameters into C code", |
| 97 | .type = OPTION_FLAG, |
| 98 | .opt.flag = &cfg.C, |
| 99 | }, |
| 100 | { |
| 101 | .name = "genkey", |
| 102 | .desc = "Generate a DSA key", |
| 103 | .type = OPTION_FLAG, |
| 104 | .opt.flag = &cfg.genkey, |
| 105 | }, |
| 106 | { |
| 107 | .name = "in", |
| 108 | .argname = "file", |
| 109 | .desc = "Input file (default stdin)", |
| 110 | .type = OPTION_ARG, |
| 111 | .opt.arg = &cfg.infile, |
| 112 | }, |
| 113 | { |
| 114 | .name = "inform", |
| 115 | .argname = "format", |
| 116 | .desc = "Input format (DER or PEM (default))", |
| 117 | .type = OPTION_ARG_FORMAT, |
| 118 | .opt.value = &cfg.informat, |
| 119 | }, |
| 120 | { |
| 121 | .name = "noout", |
| 122 | .desc = "No output", |
| 123 | .type = OPTION_FLAG, |
| 124 | .opt.flag = &cfg.noout, |
| 125 | }, |
| 126 | { |
| 127 | .name = "out", |
| 128 | .argname = "file", |
| 129 | .desc = "Output file (default stdout)", |
| 130 | .type = OPTION_ARG, |
| 131 | .opt.arg = &cfg.outfile, |
| 132 | }, |
| 133 | { |
| 134 | .name = "outform", |
| 135 | .argname = "format", |
| 136 | .desc = "Output format (DER or PEM (default))", |
| 137 | .type = OPTION_ARG_FORMAT, |
| 138 | .opt.value = &cfg.outformat, |
| 139 | }, |
| 140 | { |
| 141 | .name = "text", |
| 142 | .desc = "Print as text", |
| 143 | .type = OPTION_FLAG, |
| 144 | .opt.flag = &cfg.text, |
| 145 | }, |
| 146 | { NULL((void *)0) }, |
| 147 | }; |
| 148 | |
| 149 | static void |
| 150 | dsaparam_usage(void) |
| 151 | { |
| 152 | fprintf(stderr(&__sF[2]), |
| 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); |
| 157 | } |
| 158 | |
| 159 | static int dsa_cb(int p, int n, BN_GENCB *cb); |
| 160 | |
| 161 | int |
| 162 | dsaparam_main(int argc, char **argv) |
| 163 | { |
| 164 | DSA *dsa = NULL((void *)0); |
| 165 | int i; |
| 166 | BIO *in = NULL((void *)0), *out = NULL((void *)0); |
| 167 | BN_GENCB *cb = NULL((void *)0); |
| 168 | int ret = 1; |
| 169 | int numbits = -1; |
| 170 | char *strbits = NULL((void *)0); |
| 171 | |
| 172 | if (pledge("stdio cpath wpath rpath", NULL((void *)0)) == -1) { |
| 173 | perror("pledge"); |
| 174 | exit(1); |
| 175 | } |
| 176 | |
| 177 | memset(&cfg, 0, sizeof(cfg)); |
| 178 | |
| 179 | cfg.informat = FORMAT_PEM3; |
| 180 | cfg.outformat = FORMAT_PEM3; |
| 181 | |
| 182 | if (options_parse(argc, argv, dsaparam_options, &strbits, NULL((void *)0)) != 0) { |
| 183 | dsaparam_usage(); |
| 184 | goto end; |
| 185 | } |
| 186 | |
| 187 | if (strbits != NULL((void *)0)) { |
| 188 | const char *errstr; |
| 189 | numbits = strtonum(strbits, 0, INT_MAX0x7fffffff, &errstr); |
| 190 | if (errstr) { |
| 191 | fprintf(stderr(&__sF[2]), "Invalid number of bits: %s", errstr); |
| 192 | goto end; |
| 193 | } |
| 194 | } |
| 195 | |
| 196 | in = BIO_new(BIO_s_file()); |
| 197 | out = BIO_new(BIO_s_file()); |
| 198 | if (in == NULL((void *)0) || out == NULL((void *)0)) { |
| 199 | ERR_print_errors(bio_err); |
| 200 | goto end; |
| 201 | } |
| 202 | if (cfg.infile == NULL((void *)0)) |
| 203 | BIO_set_fp(in, stdin, BIO_NOCLOSE)BIO_ctrl(in,106,0x00,(char *)(&__sF[0])); |
| 204 | else { |
| 205 | if (BIO_read_filename(in, cfg.infile)BIO_ctrl(in,108, 0x01|0x02,(char *)cfg.infile) <= 0) { |
| 206 | perror(cfg.infile); |
| 207 | goto end; |
| 208 | } |
| 209 | } |
| 210 | if (cfg.outfile == NULL((void *)0)) { |
| 211 | BIO_set_fp(out, stdout, BIO_NOCLOSE)BIO_ctrl(out,106,0x00,(char *)(&__sF[1])); |
| 212 | } else { |
| 213 | if (BIO_write_filename(out, cfg.outfile)BIO_ctrl(out,108, 0x01|0x04,cfg.outfile) <= 0) { |
| 214 | perror(cfg.outfile); |
| 215 | goto end; |
| 216 | } |
| 217 | } |
| 218 | |
| 219 | if (numbits > 0) { |
| 220 | if ((cb = BN_GENCB_new()) == NULL((void *)0)) { |
| 221 | BIO_printf(bio_err, |
| 222 | "Error allocating BN_GENCB object\n"); |
| 223 | goto end; |
| 224 | } |
| 225 | |
| 226 | BN_GENCB_set(cb, dsa_cb, bio_err); |
| 227 | |
| 228 | dsa = DSA_new(); |
| 229 | if (!dsa) { |
| 230 | BIO_printf(bio_err, "Error allocating DSA object\n"); |
| 231 | goto end; |
| 232 | } |
| 233 | BIO_printf(bio_err, "Generating DSA parameters, %d bit long prime\n", numbits); |
| 234 | BIO_printf(bio_err, "This could take some time\n"); |
| 235 | if (!DSA_generate_parameters_ex(dsa, numbits, NULL((void *)0), 0, NULL((void *)0), NULL((void *)0), cb)) { |
| 236 | ERR_print_errors(bio_err); |
| 237 | BIO_printf(bio_err, "Error, DSA key generation failed\n"); |
| 238 | goto end; |
| 239 | } |
| 240 | } else if (cfg.informat == FORMAT_ASN11) |
| 241 | dsa = d2i_DSAparams_bio(in, NULL((void *)0)); |
| 242 | else if (cfg.informat == FORMAT_PEM3) |
| 243 | dsa = PEM_read_bio_DSAparams(in, NULL((void *)0), NULL((void *)0), NULL((void *)0)); |
| 244 | else { |
| 245 | BIO_printf(bio_err, "bad input format specified\n"); |
| 246 | goto end; |
| 247 | } |
| 248 | if (dsa == NULL((void *)0)) { |
| 249 | BIO_printf(bio_err, "unable to load DSA parameters\n"); |
| 250 | ERR_print_errors(bio_err); |
| 251 | goto end; |
| 252 | } |
| 253 | if (cfg.text) { |
| 254 | DSAparams_print(out, dsa); |
| 255 | } |
| 256 | if (cfg.C) { |
| 257 | unsigned char *data; |
| 258 | int l, len, bits_p; |
| 259 | |
| 260 | len = BN_num_bytes(DSA_get0_p(dsa))((BN_num_bits(DSA_get0_p(dsa))+7)/8); |
| 261 | bits_p = BN_num_bits(DSA_get0_p(dsa)); |
| 262 | data = malloc(len + 20); |
| 263 | if (data == NULL((void *)0)) { |
| 264 | perror("malloc"); |
| 265 | goto end; |
| 266 | } |
| 267 | l = BN_bn2bin(DSA_get0_p(dsa), data); |
| 268 | printf("static unsigned char dsa%d_p[] = {", bits_p); |
| 269 | for (i = 0; i < l; i++) { |
| 270 | if ((i % 12) == 0) |
| 271 | printf("\n\t"); |
| 272 | printf("0x%02X, ", data[i]); |
| 273 | } |
| 274 | printf("\n\t};\n"); |
| 275 | |
| 276 | l = BN_bn2bin(DSA_get0_q(dsa), data); |
| 277 | printf("static unsigned char dsa%d_q[] = {", bits_p); |
| 278 | for (i = 0; i < l; i++) { |
| 279 | if ((i % 12) == 0) |
| 280 | printf("\n\t"); |
| 281 | printf("0x%02X, ", data[i]); |
| 282 | } |
| 283 | printf("\n\t};\n"); |
| 284 | |
| 285 | l = BN_bn2bin(DSA_get0_g(dsa), data); |
| 286 | printf("static unsigned char dsa%d_g[] = {", bits_p); |
| 287 | for (i = 0; i < l; i++) { |
| 288 | if ((i % 12) == 0) |
| 289 | printf("\n\t"); |
| 290 | printf("0x%02X, ", data[i]); |
| 291 | } |
| 292 | free(data); |
| 293 | printf("\n\t};\n\n"); |
| 294 | |
| 295 | printf("DSA *get_dsa%d()\n\t{\n", bits_p); |
| 296 | printf("\tBIGNUM *p = NULL, *q = NULL, *g = NULL;\n"); |
| 297 | printf("\tDSA *dsa;\n\n"); |
| 298 | printf("\tif ((dsa = DSA_new()) == NULL) return(NULL);\n"); |
| 299 | printf("\tp = BN_bin2bn(dsa%d_p, sizeof(dsa%d_p), NULL);\n", |
| 300 | bits_p, bits_p); |
| 301 | printf("\tq = BN_bin2bn(dsa%d_q, sizeof(dsa%d_q), NULL);\n", |
| 302 | bits_p, bits_p); |
| 303 | printf("\tg = BN_bin2bn(dsa%d_g, sizeof(dsa%d_g), NULL);\n", |
| 304 | bits_p, bits_p); |
| 305 | printf("\tif (p == NULL || q == NULL || g == NULL)\n"); |
| 306 | printf("\t\t{ BN_free(p); BN_free(q); BN_free(g); DSA_free(dsa); return(NULL); }\n"); |
| 307 | printf("\tDSA_set0_pqg(dsa, p, q, g);\n"); |
| 308 | printf("\treturn(dsa);\n\t}\n"); |
| 309 | } |
| 310 | if (!cfg.noout) { |
| 311 | if (cfg.outformat == FORMAT_ASN11) |
| 312 | i = i2d_DSAparams_bio(out, dsa); |
| 313 | else if (cfg.outformat == FORMAT_PEM3) |
| 314 | i = PEM_write_bio_DSAparams(out, dsa); |
| 315 | else { |
| 316 | BIO_printf(bio_err, "bad output format specified for outfile\n"); |
| 317 | goto end; |
| 318 | } |
| 319 | if (!i) { |
| 320 | BIO_printf(bio_err, "unable to write DSA parameters\n"); |
| 321 | ERR_print_errors(bio_err); |
| 322 | goto end; |
| 323 | } |
| 324 | } |
| 325 | if (cfg.genkey) { |
| 326 | DSA *dsakey; |
| 327 | |
| 328 | if ((dsakey = DSAparams_dup(dsa)) == NULL((void *)0)) |
| 329 | goto end; |
| 330 | if (!DSA_generate_key(dsakey)) { |
| 331 | ERR_print_errors(bio_err); |
| 332 | DSA_free(dsakey); |
| 333 | goto end; |
| 334 | } |
| 335 | if (cfg.outformat == FORMAT_ASN11) |
| 336 | i = i2d_DSAPrivateKey_bio(out, dsakey); |
Value stored to 'i' is never read | |
| 337 | else if (cfg.outformat == FORMAT_PEM3) |
| 338 | i = PEM_write_bio_DSAPrivateKey(out, dsakey, NULL((void *)0), NULL((void *)0), 0, NULL((void *)0), NULL((void *)0)); |
| 339 | else { |
| 340 | BIO_printf(bio_err, "bad output format specified for outfile\n"); |
| 341 | DSA_free(dsakey); |
| 342 | goto end; |
| 343 | } |
| 344 | DSA_free(dsakey); |
| 345 | } |
| 346 | ret = 0; |
| 347 | |
| 348 | end: |
| 349 | BIO_free(in); |
| 350 | BIO_free_all(out); |
| 351 | BN_GENCB_free(cb); |
| 352 | DSA_free(dsa); |
| 353 | |
| 354 | return (ret); |
| 355 | } |
| 356 | |
| 357 | static int |
| 358 | dsa_cb(int p, int n, BN_GENCB *cb) |
| 359 | { |
| 360 | char c = '*'; |
| 361 | |
| 362 | if (p == 0) |
| 363 | c = '.'; |
| 364 | if (p == 1) |
| 365 | c = '+'; |
| 366 | if (p == 2) |
| 367 | c = '*'; |
| 368 | if (p == 3) |
| 369 | c = '\n'; |
| 370 | BIO_write(BN_GENCB_get_arg(cb), &c, 1); |
| 371 | (void) BIO_flush(BN_GENCB_get_arg(cb))(int)BIO_ctrl(BN_GENCB_get_arg(cb),11,0,((void *)0)); |
| 372 | #ifdef GENCB_TEST |
| 373 | if (stop_keygen_flag) |
| 374 | return 0; |
| 375 | #endif |
| 376 | return 1; |
| 377 | } |