1 /* $OpenBSD: rsa.c,v 1.19 2023/07/23 11:39:29 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> 60 61 #include <stdio.h> 62 #include <stdlib.h> 63 #include <string.h> 64 #include <time.h> 65 66 #include "apps.h" 67 #include "progs.h" 68 69 #include <openssl/bio.h> 70 #include <openssl/bn.h> 71 #include <openssl/err.h> 72 #include <openssl/evp.h> 73 #include <openssl/pem.h> 74 #include <openssl/rsa.h> 75 #include <openssl/x509.h> 76 77 static struct { 78 int check; 79 const EVP_CIPHER *enc; 80 char *infile; 81 int informat; 82 int modulus; 83 int noout; 84 char *outfile; 85 int outformat; 86 char *passargin; 87 char *passargout; 88 int pubin; 89 int pubout; 90 int pvk_encr; 91 int text; 92 } cfg; 93 94 static int 95 rsa_opt_cipher(int argc, char **argv, int *argsused) 96 { 97 char *name = argv[0]; 98 99 if (*name++ != '-') 100 return (1); 101 102 if ((cfg.enc = EVP_get_cipherbyname(name)) == NULL) { 103 fprintf(stderr, "Invalid cipher '%s'\n", name); 104 return (1); 105 } 106 107 *argsused = 1; 108 return (0); 109 } 110 111 static const struct option rsa_options[] = { 112 { 113 .name = "check", 114 .desc = "Check consistency of RSA private key", 115 .type = OPTION_FLAG, 116 .opt.flag = &cfg.check, 117 }, 118 { 119 .name = "in", 120 .argname = "file", 121 .desc = "Input file (default stdin)", 122 .type = OPTION_ARG, 123 .opt.arg = &cfg.infile, 124 }, 125 { 126 .name = "inform", 127 .argname = "format", 128 .desc = "Input format (DER, NET or PEM (default))", 129 .type = OPTION_ARG_FORMAT, 130 .opt.value = &cfg.informat, 131 }, 132 { 133 .name = "modulus", 134 .desc = "Print the RSA key modulus", 135 .type = OPTION_FLAG, 136 .opt.flag = &cfg.modulus, 137 }, 138 { 139 .name = "noout", 140 .desc = "Do not print encoded version of the key", 141 .type = OPTION_FLAG, 142 .opt.flag = &cfg.noout, 143 }, 144 { 145 .name = "out", 146 .argname = "file", 147 .desc = "Output file (default stdout)", 148 .type = OPTION_ARG, 149 .opt.arg = &cfg.outfile, 150 }, 151 { 152 .name = "outform", 153 .argname = "format", 154 .desc = "Output format (DER, NET or PEM (default PEM))", 155 .type = OPTION_ARG_FORMAT, 156 .opt.value = &cfg.outformat, 157 }, 158 { 159 .name = "passin", 160 .argname = "src", 161 .desc = "Input file passphrase source", 162 .type = OPTION_ARG, 163 .opt.arg = &cfg.passargin, 164 }, 165 { 166 .name = "passout", 167 .argname = "src", 168 .desc = "Output file passphrase source", 169 .type = OPTION_ARG, 170 .opt.arg = &cfg.passargout, 171 }, 172 { 173 .name = "pubin", 174 .desc = "Expect a public key (default private key)", 175 .type = OPTION_VALUE, 176 .value = 1, 177 .opt.value = &cfg.pubin, 178 }, 179 { 180 .name = "pubout", 181 .desc = "Output a public key (default private key)", 182 .type = OPTION_VALUE, 183 .value = 1, 184 .opt.value = &cfg.pubout, 185 }, 186 { 187 .name = "pvk-none", 188 .type = OPTION_VALUE, 189 .value = 0, 190 .opt.value = &cfg.pvk_encr, 191 }, 192 { 193 .name = "pvk-strong", 194 .type = OPTION_VALUE, 195 .value = 2, 196 .opt.value = &cfg.pvk_encr, 197 }, 198 { 199 .name = "pvk-weak", 200 .type = OPTION_VALUE, 201 .value = 1, 202 .opt.value = &cfg.pvk_encr, 203 }, 204 { 205 .name = "RSAPublicKey_in", 206 .type = OPTION_VALUE, 207 .value = 2, 208 .opt.value = &cfg.pubin, 209 }, 210 { 211 .name = "RSAPublicKey_out", 212 .type = OPTION_VALUE, 213 .value = 2, 214 .opt.value = &cfg.pubout, 215 }, 216 { 217 .name = "text", 218 .desc = "Print in plain text in addition to encoded", 219 .type = OPTION_FLAG, 220 .opt.flag = &cfg.text, 221 }, 222 { 223 .name = NULL, 224 .type = OPTION_ARGV_FUNC, 225 .opt.argvfunc = rsa_opt_cipher, 226 }, 227 { NULL } 228 }; 229 230 static void 231 rsa_usage(void) 232 { 233 int n = 0; 234 235 fprintf(stderr, 236 "usage: rsa [-ciphername] [-check] [-in file] " 237 "[-inform fmt]\n" 238 " [-modulus] [-noout] [-out file] [-outform fmt] " 239 "[-passin src]\n" 240 " [-passout src] [-pubin] [-pubout] [-text]\n\n"); 241 options_usage(rsa_options); 242 fprintf(stderr, "\n"); 243 244 fprintf(stderr, "Valid ciphername values:\n\n"); 245 OBJ_NAME_do_all_sorted(OBJ_NAME_TYPE_CIPHER_METH, show_cipher, &n); 246 fprintf(stderr, "\n"); 247 } 248 249 int 250 rsa_main(int argc, char **argv) 251 { 252 int ret = 1; 253 RSA *rsa = NULL; 254 int i; 255 BIO *out = NULL; 256 char *passin = NULL, *passout = NULL; 257 258 if (pledge("stdio cpath wpath rpath tty", NULL) == -1) { 259 perror("pledge"); 260 exit(1); 261 } 262 263 memset(&cfg, 0, sizeof(cfg)); 264 cfg.pvk_encr = 2; 265 cfg.informat = FORMAT_PEM; 266 cfg.outformat = FORMAT_PEM; 267 268 if (options_parse(argc, argv, rsa_options, NULL, NULL) != 0) { 269 rsa_usage(); 270 goto end; 271 } 272 273 if (!app_passwd(bio_err, cfg.passargin, cfg.passargout, 274 &passin, &passout)) { 275 BIO_printf(bio_err, "Error getting passwords\n"); 276 goto end; 277 } 278 if (cfg.check && cfg.pubin) { 279 BIO_printf(bio_err, "Only private keys can be checked\n"); 280 goto end; 281 } 282 out = BIO_new(BIO_s_file()); 283 284 { 285 EVP_PKEY *pkey; 286 287 if (cfg.pubin) { 288 int tmpformat = -1; 289 if (cfg.pubin == 2) { 290 if (cfg.informat == FORMAT_PEM) 291 tmpformat = FORMAT_PEMRSA; 292 else if (cfg.informat == FORMAT_ASN1) 293 tmpformat = FORMAT_ASN1RSA; 294 } else 295 tmpformat = cfg.informat; 296 297 pkey = load_pubkey(bio_err, cfg.infile, 298 tmpformat, 1, passin, "Public Key"); 299 } else 300 pkey = load_key(bio_err, cfg.infile, 301 cfg.informat, 1, passin, "Private Key"); 302 303 if (pkey != NULL) 304 rsa = EVP_PKEY_get1_RSA(pkey); 305 EVP_PKEY_free(pkey); 306 } 307 308 if (rsa == NULL) { 309 ERR_print_errors(bio_err); 310 goto end; 311 } 312 if (cfg.outfile == NULL) { 313 BIO_set_fp(out, stdout, BIO_NOCLOSE); 314 } else { 315 if (BIO_write_filename(out, cfg.outfile) <= 0) { 316 perror(cfg.outfile); 317 goto end; 318 } 319 } 320 321 if (cfg.text) 322 if (!RSA_print(out, rsa, 0)) { 323 perror(cfg.outfile); 324 ERR_print_errors(bio_err); 325 goto end; 326 } 327 if (cfg.modulus) { 328 BIO_printf(out, "Modulus="); 329 BN_print(out, RSA_get0_n(rsa)); 330 BIO_printf(out, "\n"); 331 } 332 if (cfg.check) { 333 int r = RSA_check_key(rsa); 334 335 if (r == 1) 336 BIO_printf(out, "RSA key ok\n"); 337 else if (r == 0) { 338 unsigned long err; 339 340 while ((err = ERR_peek_error()) != 0 && 341 ERR_GET_LIB(err) == ERR_LIB_RSA && 342 ERR_GET_FUNC(err) == RSA_F_RSA_CHECK_KEY && 343 ERR_GET_REASON(err) != ERR_R_MALLOC_FAILURE) { 344 BIO_printf(out, "RSA key error: %s\n", 345 ERR_reason_error_string(err)); 346 ERR_get_error(); /* remove e from error 347 * stack */ 348 } 349 } 350 if (r == -1 || ERR_peek_error() != 0) { /* should happen only if 351 * r == -1 */ 352 ERR_print_errors(bio_err); 353 goto end; 354 } 355 } 356 if (cfg.noout) { 357 ret = 0; 358 goto end; 359 } 360 BIO_printf(bio_err, "writing RSA key\n"); 361 if (cfg.outformat == FORMAT_ASN1) { 362 if (cfg.pubout || cfg.pubin) { 363 if (cfg.pubout == 2) 364 i = i2d_RSAPublicKey_bio(out, rsa); 365 else 366 i = i2d_RSA_PUBKEY_bio(out, rsa); 367 } else 368 i = i2d_RSAPrivateKey_bio(out, rsa); 369 } else if (cfg.outformat == FORMAT_PEM) { 370 if (cfg.pubout || cfg.pubin) { 371 if (cfg.pubout == 2) 372 i = PEM_write_bio_RSAPublicKey(out, rsa); 373 else 374 i = PEM_write_bio_RSA_PUBKEY(out, rsa); 375 } else 376 i = PEM_write_bio_RSAPrivateKey(out, rsa, 377 cfg.enc, NULL, 0, NULL, passout); 378 #if !defined(OPENSSL_NO_DSA) && !defined(OPENSSL_NO_RC4) 379 } else if (cfg.outformat == FORMAT_MSBLOB || 380 cfg.outformat == FORMAT_PVK) { 381 EVP_PKEY *pk; 382 pk = EVP_PKEY_new(); 383 EVP_PKEY_set1_RSA(pk, rsa); 384 if (cfg.outformat == FORMAT_PVK) 385 i = i2b_PVK_bio(out, pk, cfg.pvk_encr, 0, 386 passout); 387 else if (cfg.pubin || cfg.pubout) 388 i = i2b_PublicKey_bio(out, pk); 389 else 390 i = i2b_PrivateKey_bio(out, pk); 391 EVP_PKEY_free(pk); 392 #endif 393 } else { 394 BIO_printf(bio_err, 395 "bad output format specified for outfile\n"); 396 goto end; 397 } 398 if (i <= 0) { 399 BIO_printf(bio_err, "unable to write key\n"); 400 ERR_print_errors(bio_err); 401 } else 402 ret = 0; 403 404 end: 405 BIO_free_all(out); 406 RSA_free(rsa); 407 free(passin); 408 free(passout); 409 410 return (ret); 411 } 412