1 /* $OpenBSD: rsa.c,v 1.4 2015/08/19 18:25:31 deraadt 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 #ifndef OPENSSL_NO_ENGINE 81 char *engine; 82 #endif 83 char *infile; 84 int informat; 85 int modulus; 86 int noout; 87 char *outfile; 88 int outformat; 89 char *passargin; 90 char *passargout; 91 int pubin; 92 int pubout; 93 int pvk_encr; 94 int sgckey; 95 int text; 96 } rsa_config; 97 98 static int 99 rsa_opt_cipher(int argc, char **argv, int *argsused) 100 { 101 char *name = argv[0]; 102 103 if (*name++ != '-') 104 return (1); 105 106 if ((rsa_config.enc = EVP_get_cipherbyname(name)) == NULL) { 107 fprintf(stderr, "Invalid cipher '%s'\n", name); 108 return (1); 109 } 110 111 *argsused = 1; 112 return (0); 113 } 114 115 static struct option rsa_options[] = { 116 { 117 .name = "check", 118 .desc = "Check consistency of RSA private key", 119 .type = OPTION_FLAG, 120 .opt.flag = &rsa_config.check, 121 }, 122 #ifndef OPENSSL_NO_ENGINE 123 { 124 .name = "engine", 125 .argname = "id", 126 .desc = "Use the engine specified by the given identifier", 127 .type = OPTION_ARG, 128 .opt.arg = &rsa_config.engine, 129 }, 130 #endif 131 { 132 .name = "in", 133 .argname = "file", 134 .desc = "Input file (default stdin)", 135 .type = OPTION_ARG, 136 .opt.arg = &rsa_config.infile, 137 }, 138 { 139 .name = "inform", 140 .argname = "format", 141 .desc = "Input format (DER, NET or PEM (default))", 142 .type = OPTION_ARG_FORMAT, 143 .opt.value = &rsa_config.informat, 144 }, 145 { 146 .name = "modulus", 147 .desc = "Print the RSA key modulus", 148 .type = OPTION_FLAG, 149 .opt.flag = &rsa_config.modulus, 150 }, 151 { 152 .name = "noout", 153 .desc = "Do not print encoded version of the key", 154 .type = OPTION_FLAG, 155 .opt.flag = &rsa_config.noout, 156 }, 157 { 158 .name = "out", 159 .argname = "file", 160 .desc = "Output file (default stdout)", 161 .type = OPTION_ARG, 162 .opt.arg = &rsa_config.outfile, 163 }, 164 { 165 .name = "outform", 166 .argname = "format", 167 .desc = "Output format (DER, NET or PEM (default PEM))", 168 .type = OPTION_ARG_FORMAT, 169 .opt.value = &rsa_config.outformat, 170 }, 171 { 172 .name = "passin", 173 .argname = "src", 174 .desc = "Input file passphrase source", 175 .type = OPTION_ARG, 176 .opt.arg = &rsa_config.passargin, 177 }, 178 { 179 .name = "passout", 180 .argname = "src", 181 .desc = "Output file passphrase source", 182 .type = OPTION_ARG, 183 .opt.arg = &rsa_config.passargout, 184 }, 185 { 186 .name = "pubin", 187 .desc = "Expect a public key (default private key)", 188 .type = OPTION_VALUE, 189 .value = 1, 190 .opt.value = &rsa_config.pubin, 191 }, 192 { 193 .name = "pubout", 194 .desc = "Output a public key (default private key)", 195 .type = OPTION_VALUE, 196 .value = 1, 197 .opt.value = &rsa_config.pubout, 198 }, 199 { 200 .name = "pvk-none", 201 .type = OPTION_VALUE, 202 .value = 0, 203 .opt.value = &rsa_config.pvk_encr, 204 }, 205 { 206 .name = "pvk-strong", 207 .type = OPTION_VALUE, 208 .value = 2, 209 .opt.value = &rsa_config.pvk_encr, 210 }, 211 { 212 .name = "pvk-weak", 213 .type = OPTION_VALUE, 214 .value = 1, 215 .opt.value = &rsa_config.pvk_encr, 216 }, 217 { 218 .name = "RSAPublicKey_in", 219 .type = OPTION_VALUE, 220 .value = 2, 221 .opt.value = &rsa_config.pubin, 222 }, 223 { 224 .name = "RSAPublicKey_out", 225 .type = OPTION_VALUE, 226 .value = 2, 227 .opt.value = &rsa_config.pubout, 228 }, 229 { 230 .name = "sgckey", 231 .desc = "Use modified NET algorithm for IIS and SGC keys", 232 .type = OPTION_FLAG, 233 .opt.flag = &rsa_config.sgckey, 234 }, 235 { 236 .name = "text", 237 .desc = "Print in plain text in addition to encoded", 238 .type = OPTION_FLAG, 239 .opt.flag = &rsa_config.text, 240 }, 241 { 242 .name = NULL, 243 .type = OPTION_ARGV_FUNC, 244 .opt.argvfunc = rsa_opt_cipher, 245 }, 246 { NULL } 247 }; 248 249 static void 250 show_ciphers(const OBJ_NAME *name, void *arg) 251 { 252 static int n; 253 254 fprintf(stderr, " -%-24s%s", name->name, (++n % 3 ? "" : "\n")); 255 } 256 257 static void 258 rsa_usage() 259 { 260 fprintf(stderr, 261 "usage: rsa [-ciphername] [-check] [-engine id] [-in file] " 262 "[-inform fmt]\n" 263 " [-modulus] [-noout] [-out file] [-outform fmt] " 264 "[-passin src]\n" 265 " [-passout src] [-pubin] [-pubout] [-sgckey] [-text]\n\n"); 266 options_usage(rsa_options); 267 fprintf(stderr, "\n"); 268 269 fprintf(stderr, "Valid ciphername values:\n\n"); 270 OBJ_NAME_do_all_sorted(OBJ_NAME_TYPE_CIPHER_METH, show_ciphers, NULL); 271 fprintf(stderr, "\n"); 272 } 273 274 int 275 rsa_main(int argc, char **argv) 276 { 277 ENGINE *e = NULL; 278 int ret = 1; 279 RSA *rsa = NULL; 280 int i; 281 BIO *out = NULL; 282 char *passin = NULL, *passout = NULL; 283 284 memset(&rsa_config, 0, sizeof(rsa_config)); 285 rsa_config.pvk_encr = 2; 286 rsa_config.informat = FORMAT_PEM; 287 rsa_config.outformat = FORMAT_PEM; 288 289 if (options_parse(argc, argv, rsa_options, NULL, NULL) != 0) { 290 rsa_usage(); 291 goto end; 292 } 293 294 #ifndef OPENSSL_NO_ENGINE 295 e = setup_engine(bio_err, rsa_config.engine, 0); 296 #endif 297 298 if (!app_passwd(bio_err, rsa_config.passargin, rsa_config.passargout, 299 &passin, &passout)) { 300 BIO_printf(bio_err, "Error getting passwords\n"); 301 goto end; 302 } 303 if (rsa_config.check && rsa_config.pubin) { 304 BIO_printf(bio_err, "Only private keys can be checked\n"); 305 goto end; 306 } 307 out = BIO_new(BIO_s_file()); 308 309 { 310 EVP_PKEY *pkey; 311 312 if (rsa_config.pubin) { 313 int tmpformat = -1; 314 if (rsa_config.pubin == 2) { 315 if (rsa_config.informat == FORMAT_PEM) 316 tmpformat = FORMAT_PEMRSA; 317 else if (rsa_config.informat == FORMAT_ASN1) 318 tmpformat = FORMAT_ASN1RSA; 319 } else if (rsa_config.informat == FORMAT_NETSCAPE && 320 rsa_config.sgckey) 321 tmpformat = FORMAT_IISSGC; 322 else 323 tmpformat = rsa_config.informat; 324 325 pkey = load_pubkey(bio_err, rsa_config.infile, 326 tmpformat, 1, passin, e, "Public Key"); 327 } else 328 pkey = load_key(bio_err, rsa_config.infile, 329 (rsa_config.informat == FORMAT_NETSCAPE && 330 rsa_config.sgckey ? FORMAT_IISSGC : 331 rsa_config.informat), 1, passin, e, "Private Key"); 332 333 if (pkey != NULL) 334 rsa = EVP_PKEY_get1_RSA(pkey); 335 EVP_PKEY_free(pkey); 336 } 337 338 if (rsa == NULL) { 339 ERR_print_errors(bio_err); 340 goto end; 341 } 342 if (rsa_config.outfile == NULL) { 343 BIO_set_fp(out, stdout, BIO_NOCLOSE); 344 } else { 345 if (BIO_write_filename(out, rsa_config.outfile) <= 0) { 346 perror(rsa_config.outfile); 347 goto end; 348 } 349 } 350 351 if (rsa_config.text) 352 if (!RSA_print(out, rsa, 0)) { 353 perror(rsa_config.outfile); 354 ERR_print_errors(bio_err); 355 goto end; 356 } 357 if (rsa_config.modulus) { 358 BIO_printf(out, "Modulus="); 359 BN_print(out, rsa->n); 360 BIO_printf(out, "\n"); 361 } 362 if (rsa_config.check) { 363 int r = RSA_check_key(rsa); 364 365 if (r == 1) 366 BIO_printf(out, "RSA key ok\n"); 367 else if (r == 0) { 368 unsigned long err; 369 370 while ((err = ERR_peek_error()) != 0 && 371 ERR_GET_LIB(err) == ERR_LIB_RSA && 372 ERR_GET_FUNC(err) == RSA_F_RSA_CHECK_KEY && 373 ERR_GET_REASON(err) != ERR_R_MALLOC_FAILURE) { 374 BIO_printf(out, "RSA key error: %s\n", 375 ERR_reason_error_string(err)); 376 ERR_get_error(); /* remove e from error 377 * stack */ 378 } 379 } 380 if (r == -1 || ERR_peek_error() != 0) { /* should happen only if 381 * r == -1 */ 382 ERR_print_errors(bio_err); 383 goto end; 384 } 385 } 386 if (rsa_config.noout) { 387 ret = 0; 388 goto end; 389 } 390 BIO_printf(bio_err, "writing RSA key\n"); 391 if (rsa_config.outformat == FORMAT_ASN1) { 392 if (rsa_config.pubout || rsa_config.pubin) { 393 if (rsa_config.pubout == 2) 394 i = i2d_RSAPublicKey_bio(out, rsa); 395 else 396 i = i2d_RSA_PUBKEY_bio(out, rsa); 397 } else 398 i = i2d_RSAPrivateKey_bio(out, rsa); 399 } 400 #ifndef OPENSSL_NO_RC4 401 else if (rsa_config.outformat == FORMAT_NETSCAPE) { 402 unsigned char *p, *pp; 403 int size; 404 405 i = 1; 406 size = i2d_RSA_NET(rsa, NULL, NULL, rsa_config.sgckey); 407 if ((p = malloc(size)) == NULL) { 408 BIO_printf(bio_err, "Memory allocation failure\n"); 409 goto end; 410 } 411 pp = p; 412 i2d_RSA_NET(rsa, &p, NULL, rsa_config.sgckey); 413 BIO_write(out, (char *) pp, size); 414 free(pp); 415 } 416 #endif 417 else if (rsa_config.outformat == FORMAT_PEM) { 418 if (rsa_config.pubout || rsa_config.pubin) { 419 if (rsa_config.pubout == 2) 420 i = PEM_write_bio_RSAPublicKey(out, rsa); 421 else 422 i = PEM_write_bio_RSA_PUBKEY(out, rsa); 423 } else 424 i = PEM_write_bio_RSAPrivateKey(out, rsa, 425 rsa_config.enc, NULL, 0, NULL, passout); 426 #if !defined(OPENSSL_NO_DSA) && !defined(OPENSSL_NO_RC4) 427 } else if (rsa_config.outformat == FORMAT_MSBLOB || 428 rsa_config.outformat == FORMAT_PVK) { 429 EVP_PKEY *pk; 430 pk = EVP_PKEY_new(); 431 EVP_PKEY_set1_RSA(pk, rsa); 432 if (rsa_config.outformat == FORMAT_PVK) 433 i = i2b_PVK_bio(out, pk, rsa_config.pvk_encr, 0, 434 passout); 435 else if (rsa_config.pubin || rsa_config.pubout) 436 i = i2b_PublicKey_bio(out, pk); 437 else 438 i = i2b_PrivateKey_bio(out, pk); 439 EVP_PKEY_free(pk); 440 #endif 441 } else { 442 BIO_printf(bio_err, 443 "bad output format specified for outfile\n"); 444 goto end; 445 } 446 if (i <= 0) { 447 BIO_printf(bio_err, "unable to write key\n"); 448 ERR_print_errors(bio_err); 449 } else 450 ret = 0; 451 452 end: 453 BIO_free_all(out); 454 RSA_free(rsa); 455 free(passin); 456 free(passout); 457 458 return (ret); 459 } 460