1 /* $OpenBSD: rsa.c,v 1.7 2015/10/17 07:51:10 semarie 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 sgckey; 92 int text; 93 } rsa_config; 94 95 static int 96 rsa_opt_cipher(int argc, char **argv, int *argsused) 97 { 98 char *name = argv[0]; 99 100 if (*name++ != '-') 101 return (1); 102 103 if ((rsa_config.enc = EVP_get_cipherbyname(name)) == NULL) { 104 fprintf(stderr, "Invalid cipher '%s'\n", name); 105 return (1); 106 } 107 108 *argsused = 1; 109 return (0); 110 } 111 112 static struct option rsa_options[] = { 113 { 114 .name = "check", 115 .desc = "Check consistency of RSA private key", 116 .type = OPTION_FLAG, 117 .opt.flag = &rsa_config.check, 118 }, 119 { 120 .name = "in", 121 .argname = "file", 122 .desc = "Input file (default stdin)", 123 .type = OPTION_ARG, 124 .opt.arg = &rsa_config.infile, 125 }, 126 { 127 .name = "inform", 128 .argname = "format", 129 .desc = "Input format (DER, NET or PEM (default))", 130 .type = OPTION_ARG_FORMAT, 131 .opt.value = &rsa_config.informat, 132 }, 133 { 134 .name = "modulus", 135 .desc = "Print the RSA key modulus", 136 .type = OPTION_FLAG, 137 .opt.flag = &rsa_config.modulus, 138 }, 139 { 140 .name = "noout", 141 .desc = "Do not print encoded version of the key", 142 .type = OPTION_FLAG, 143 .opt.flag = &rsa_config.noout, 144 }, 145 { 146 .name = "out", 147 .argname = "file", 148 .desc = "Output file (default stdout)", 149 .type = OPTION_ARG, 150 .opt.arg = &rsa_config.outfile, 151 }, 152 { 153 .name = "outform", 154 .argname = "format", 155 .desc = "Output format (DER, NET or PEM (default PEM))", 156 .type = OPTION_ARG_FORMAT, 157 .opt.value = &rsa_config.outformat, 158 }, 159 { 160 .name = "passin", 161 .argname = "src", 162 .desc = "Input file passphrase source", 163 .type = OPTION_ARG, 164 .opt.arg = &rsa_config.passargin, 165 }, 166 { 167 .name = "passout", 168 .argname = "src", 169 .desc = "Output file passphrase source", 170 .type = OPTION_ARG, 171 .opt.arg = &rsa_config.passargout, 172 }, 173 { 174 .name = "pubin", 175 .desc = "Expect a public key (default private key)", 176 .type = OPTION_VALUE, 177 .value = 1, 178 .opt.value = &rsa_config.pubin, 179 }, 180 { 181 .name = "pubout", 182 .desc = "Output a public key (default private key)", 183 .type = OPTION_VALUE, 184 .value = 1, 185 .opt.value = &rsa_config.pubout, 186 }, 187 { 188 .name = "pvk-none", 189 .type = OPTION_VALUE, 190 .value = 0, 191 .opt.value = &rsa_config.pvk_encr, 192 }, 193 { 194 .name = "pvk-strong", 195 .type = OPTION_VALUE, 196 .value = 2, 197 .opt.value = &rsa_config.pvk_encr, 198 }, 199 { 200 .name = "pvk-weak", 201 .type = OPTION_VALUE, 202 .value = 1, 203 .opt.value = &rsa_config.pvk_encr, 204 }, 205 { 206 .name = "RSAPublicKey_in", 207 .type = OPTION_VALUE, 208 .value = 2, 209 .opt.value = &rsa_config.pubin, 210 }, 211 { 212 .name = "RSAPublicKey_out", 213 .type = OPTION_VALUE, 214 .value = 2, 215 .opt.value = &rsa_config.pubout, 216 }, 217 { 218 .name = "sgckey", 219 .desc = "Use modified NET algorithm for IIS and SGC keys", 220 .type = OPTION_FLAG, 221 .opt.flag = &rsa_config.sgckey, 222 }, 223 { 224 .name = "text", 225 .desc = "Print in plain text in addition to encoded", 226 .type = OPTION_FLAG, 227 .opt.flag = &rsa_config.text, 228 }, 229 { 230 .name = NULL, 231 .type = OPTION_ARGV_FUNC, 232 .opt.argvfunc = rsa_opt_cipher, 233 }, 234 { NULL } 235 }; 236 237 static void 238 show_ciphers(const OBJ_NAME *name, void *arg) 239 { 240 static int n; 241 242 fprintf(stderr, " -%-24s%s", name->name, (++n % 3 ? "" : "\n")); 243 } 244 245 static void 246 rsa_usage() 247 { 248 fprintf(stderr, 249 "usage: rsa [-ciphername] [-check] [-in file] " 250 "[-inform fmt]\n" 251 " [-modulus] [-noout] [-out file] [-outform fmt] " 252 "[-passin src]\n" 253 " [-passout src] [-pubin] [-pubout] [-sgckey] [-text]\n\n"); 254 options_usage(rsa_options); 255 fprintf(stderr, "\n"); 256 257 fprintf(stderr, "Valid ciphername values:\n\n"); 258 OBJ_NAME_do_all_sorted(OBJ_NAME_TYPE_CIPHER_METH, show_ciphers, NULL); 259 fprintf(stderr, "\n"); 260 } 261 262 int 263 rsa_main(int argc, char **argv) 264 { 265 int ret = 1; 266 RSA *rsa = NULL; 267 int i; 268 BIO *out = NULL; 269 char *passin = NULL, *passout = NULL; 270 271 if (single_execution) { 272 if (pledge("stdio rpath wpath cpath tty", NULL) == -1) { 273 perror("pledge"); 274 exit(1); 275 } 276 } 277 278 memset(&rsa_config, 0, sizeof(rsa_config)); 279 rsa_config.pvk_encr = 2; 280 rsa_config.informat = FORMAT_PEM; 281 rsa_config.outformat = FORMAT_PEM; 282 283 if (options_parse(argc, argv, rsa_options, NULL, NULL) != 0) { 284 rsa_usage(); 285 goto end; 286 } 287 288 if (!app_passwd(bio_err, rsa_config.passargin, rsa_config.passargout, 289 &passin, &passout)) { 290 BIO_printf(bio_err, "Error getting passwords\n"); 291 goto end; 292 } 293 if (rsa_config.check && rsa_config.pubin) { 294 BIO_printf(bio_err, "Only private keys can be checked\n"); 295 goto end; 296 } 297 out = BIO_new(BIO_s_file()); 298 299 { 300 EVP_PKEY *pkey; 301 302 if (rsa_config.pubin) { 303 int tmpformat = -1; 304 if (rsa_config.pubin == 2) { 305 if (rsa_config.informat == FORMAT_PEM) 306 tmpformat = FORMAT_PEMRSA; 307 else if (rsa_config.informat == FORMAT_ASN1) 308 tmpformat = FORMAT_ASN1RSA; 309 } else if (rsa_config.informat == FORMAT_NETSCAPE && 310 rsa_config.sgckey) 311 tmpformat = FORMAT_IISSGC; 312 else 313 tmpformat = rsa_config.informat; 314 315 pkey = load_pubkey(bio_err, rsa_config.infile, 316 tmpformat, 1, passin, "Public Key"); 317 } else 318 pkey = load_key(bio_err, rsa_config.infile, 319 (rsa_config.informat == FORMAT_NETSCAPE && 320 rsa_config.sgckey ? FORMAT_IISSGC : 321 rsa_config.informat), 1, passin, "Private Key"); 322 323 if (pkey != NULL) 324 rsa = EVP_PKEY_get1_RSA(pkey); 325 EVP_PKEY_free(pkey); 326 } 327 328 if (rsa == NULL) { 329 ERR_print_errors(bio_err); 330 goto end; 331 } 332 if (rsa_config.outfile == NULL) { 333 BIO_set_fp(out, stdout, BIO_NOCLOSE); 334 } else { 335 if (BIO_write_filename(out, rsa_config.outfile) <= 0) { 336 perror(rsa_config.outfile); 337 goto end; 338 } 339 } 340 341 if (rsa_config.text) 342 if (!RSA_print(out, rsa, 0)) { 343 perror(rsa_config.outfile); 344 ERR_print_errors(bio_err); 345 goto end; 346 } 347 if (rsa_config.modulus) { 348 BIO_printf(out, "Modulus="); 349 BN_print(out, rsa->n); 350 BIO_printf(out, "\n"); 351 } 352 if (rsa_config.check) { 353 int r = RSA_check_key(rsa); 354 355 if (r == 1) 356 BIO_printf(out, "RSA key ok\n"); 357 else if (r == 0) { 358 unsigned long err; 359 360 while ((err = ERR_peek_error()) != 0 && 361 ERR_GET_LIB(err) == ERR_LIB_RSA && 362 ERR_GET_FUNC(err) == RSA_F_RSA_CHECK_KEY && 363 ERR_GET_REASON(err) != ERR_R_MALLOC_FAILURE) { 364 BIO_printf(out, "RSA key error: %s\n", 365 ERR_reason_error_string(err)); 366 ERR_get_error(); /* remove e from error 367 * stack */ 368 } 369 } 370 if (r == -1 || ERR_peek_error() != 0) { /* should happen only if 371 * r == -1 */ 372 ERR_print_errors(bio_err); 373 goto end; 374 } 375 } 376 if (rsa_config.noout) { 377 ret = 0; 378 goto end; 379 } 380 BIO_printf(bio_err, "writing RSA key\n"); 381 if (rsa_config.outformat == FORMAT_ASN1) { 382 if (rsa_config.pubout || rsa_config.pubin) { 383 if (rsa_config.pubout == 2) 384 i = i2d_RSAPublicKey_bio(out, rsa); 385 else 386 i = i2d_RSA_PUBKEY_bio(out, rsa); 387 } else 388 i = i2d_RSAPrivateKey_bio(out, rsa); 389 } 390 #ifndef OPENSSL_NO_RC4 391 else if (rsa_config.outformat == FORMAT_NETSCAPE) { 392 unsigned char *p, *pp; 393 int size; 394 395 i = 1; 396 size = i2d_RSA_NET(rsa, NULL, NULL, rsa_config.sgckey); 397 if ((p = malloc(size)) == NULL) { 398 BIO_printf(bio_err, "Memory allocation failure\n"); 399 goto end; 400 } 401 pp = p; 402 i2d_RSA_NET(rsa, &p, NULL, rsa_config.sgckey); 403 BIO_write(out, (char *) pp, size); 404 free(pp); 405 } 406 #endif 407 else if (rsa_config.outformat == FORMAT_PEM) { 408 if (rsa_config.pubout || rsa_config.pubin) { 409 if (rsa_config.pubout == 2) 410 i = PEM_write_bio_RSAPublicKey(out, rsa); 411 else 412 i = PEM_write_bio_RSA_PUBKEY(out, rsa); 413 } else 414 i = PEM_write_bio_RSAPrivateKey(out, rsa, 415 rsa_config.enc, NULL, 0, NULL, passout); 416 #if !defined(OPENSSL_NO_DSA) && !defined(OPENSSL_NO_RC4) 417 } else if (rsa_config.outformat == FORMAT_MSBLOB || 418 rsa_config.outformat == FORMAT_PVK) { 419 EVP_PKEY *pk; 420 pk = EVP_PKEY_new(); 421 EVP_PKEY_set1_RSA(pk, rsa); 422 if (rsa_config.outformat == FORMAT_PVK) 423 i = i2b_PVK_bio(out, pk, rsa_config.pvk_encr, 0, 424 passout); 425 else if (rsa_config.pubin || rsa_config.pubout) 426 i = i2b_PublicKey_bio(out, pk); 427 else 428 i = i2b_PrivateKey_bio(out, pk); 429 EVP_PKEY_free(pk); 430 #endif 431 } else { 432 BIO_printf(bio_err, 433 "bad output format specified for outfile\n"); 434 goto end; 435 } 436 if (i <= 0) { 437 BIO_printf(bio_err, "unable to write key\n"); 438 ERR_print_errors(bio_err); 439 } else 440 ret = 0; 441 442 end: 443 BIO_free_all(out); 444 RSA_free(rsa); 445 free(passin); 446 free(passout); 447 448 return (ret); 449 } 450