1 /* $OpenBSD: rsa.c,v 1.13 2019/02/09 15:49:21 inoguchi 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 rsa_usage() 239 { 240 int n = 0; 241 242 fprintf(stderr, 243 "usage: rsa [-ciphername] [-check] [-in file] " 244 "[-inform fmt]\n" 245 " [-modulus] [-noout] [-out file] [-outform fmt] " 246 "[-passin src]\n" 247 " [-passout src] [-pubin] [-pubout] [-sgckey] [-text]\n\n"); 248 options_usage(rsa_options); 249 fprintf(stderr, "\n"); 250 251 fprintf(stderr, "Valid ciphername values:\n\n"); 252 OBJ_NAME_do_all_sorted(OBJ_NAME_TYPE_CIPHER_METH, show_cipher, &n); 253 fprintf(stderr, "\n"); 254 } 255 256 int 257 rsa_main(int argc, char **argv) 258 { 259 int ret = 1; 260 RSA *rsa = NULL; 261 int i; 262 BIO *out = NULL; 263 char *passin = NULL, *passout = NULL; 264 265 if (single_execution) { 266 if (pledge("stdio cpath wpath rpath tty", NULL) == -1) { 267 perror("pledge"); 268 exit(1); 269 } 270 } 271 272 memset(&rsa_config, 0, sizeof(rsa_config)); 273 rsa_config.pvk_encr = 2; 274 rsa_config.informat = FORMAT_PEM; 275 rsa_config.outformat = FORMAT_PEM; 276 277 if (options_parse(argc, argv, rsa_options, NULL, NULL) != 0) { 278 rsa_usage(); 279 goto end; 280 } 281 282 if (!app_passwd(bio_err, rsa_config.passargin, rsa_config.passargout, 283 &passin, &passout)) { 284 BIO_printf(bio_err, "Error getting passwords\n"); 285 goto end; 286 } 287 if (rsa_config.check && rsa_config.pubin) { 288 BIO_printf(bio_err, "Only private keys can be checked\n"); 289 goto end; 290 } 291 out = BIO_new(BIO_s_file()); 292 293 { 294 EVP_PKEY *pkey; 295 296 if (rsa_config.pubin) { 297 int tmpformat = -1; 298 if (rsa_config.pubin == 2) { 299 if (rsa_config.informat == FORMAT_PEM) 300 tmpformat = FORMAT_PEMRSA; 301 else if (rsa_config.informat == FORMAT_ASN1) 302 tmpformat = FORMAT_ASN1RSA; 303 } else if (rsa_config.informat == FORMAT_NETSCAPE && 304 rsa_config.sgckey) 305 tmpformat = FORMAT_IISSGC; 306 else 307 tmpformat = rsa_config.informat; 308 309 pkey = load_pubkey(bio_err, rsa_config.infile, 310 tmpformat, 1, passin, "Public Key"); 311 } else 312 pkey = load_key(bio_err, rsa_config.infile, 313 (rsa_config.informat == FORMAT_NETSCAPE && 314 rsa_config.sgckey ? FORMAT_IISSGC : 315 rsa_config.informat), 1, passin, "Private Key"); 316 317 if (pkey != NULL) 318 rsa = EVP_PKEY_get1_RSA(pkey); 319 EVP_PKEY_free(pkey); 320 } 321 322 if (rsa == NULL) { 323 ERR_print_errors(bio_err); 324 goto end; 325 } 326 if (rsa_config.outfile == NULL) { 327 BIO_set_fp(out, stdout, BIO_NOCLOSE); 328 } else { 329 if (BIO_write_filename(out, rsa_config.outfile) <= 0) { 330 perror(rsa_config.outfile); 331 goto end; 332 } 333 } 334 335 if (rsa_config.text) 336 if (!RSA_print(out, rsa, 0)) { 337 perror(rsa_config.outfile); 338 ERR_print_errors(bio_err); 339 goto end; 340 } 341 if (rsa_config.modulus) { 342 BIO_printf(out, "Modulus="); 343 BN_print(out, rsa->n); 344 BIO_printf(out, "\n"); 345 } 346 if (rsa_config.check) { 347 int r = RSA_check_key(rsa); 348 349 if (r == 1) 350 BIO_printf(out, "RSA key ok\n"); 351 else if (r == 0) { 352 unsigned long err; 353 354 while ((err = ERR_peek_error()) != 0 && 355 ERR_GET_LIB(err) == ERR_LIB_RSA && 356 ERR_GET_FUNC(err) == RSA_F_RSA_CHECK_KEY && 357 ERR_GET_REASON(err) != ERR_R_MALLOC_FAILURE) { 358 BIO_printf(out, "RSA key error: %s\n", 359 ERR_reason_error_string(err)); 360 ERR_get_error(); /* remove e from error 361 * stack */ 362 } 363 } 364 if (r == -1 || ERR_peek_error() != 0) { /* should happen only if 365 * r == -1 */ 366 ERR_print_errors(bio_err); 367 goto end; 368 } 369 } 370 if (rsa_config.noout) { 371 ret = 0; 372 goto end; 373 } 374 BIO_printf(bio_err, "writing RSA key\n"); 375 if (rsa_config.outformat == FORMAT_ASN1) { 376 if (rsa_config.pubout || rsa_config.pubin) { 377 if (rsa_config.pubout == 2) 378 i = i2d_RSAPublicKey_bio(out, rsa); 379 else 380 i = i2d_RSA_PUBKEY_bio(out, rsa); 381 } else 382 i = i2d_RSAPrivateKey_bio(out, rsa); 383 } 384 #ifndef OPENSSL_NO_RC4 385 else if (rsa_config.outformat == FORMAT_NETSCAPE) { 386 unsigned char *p, *pp; 387 int size; 388 389 i = 1; 390 size = i2d_RSA_NET(rsa, NULL, NULL, rsa_config.sgckey); 391 if ((p = malloc(size)) == NULL) { 392 BIO_printf(bio_err, "Memory allocation failure\n"); 393 goto end; 394 } 395 pp = p; 396 i2d_RSA_NET(rsa, &p, NULL, rsa_config.sgckey); 397 BIO_write(out, (char *) pp, size); 398 free(pp); 399 } 400 #endif 401 else if (rsa_config.outformat == FORMAT_PEM) { 402 if (rsa_config.pubout || rsa_config.pubin) { 403 if (rsa_config.pubout == 2) 404 i = PEM_write_bio_RSAPublicKey(out, rsa); 405 else 406 i = PEM_write_bio_RSA_PUBKEY(out, rsa); 407 } else 408 i = PEM_write_bio_RSAPrivateKey(out, rsa, 409 rsa_config.enc, NULL, 0, NULL, passout); 410 #if !defined(OPENSSL_NO_DSA) && !defined(OPENSSL_NO_RC4) 411 } else if (rsa_config.outformat == FORMAT_MSBLOB || 412 rsa_config.outformat == FORMAT_PVK) { 413 EVP_PKEY *pk; 414 pk = EVP_PKEY_new(); 415 EVP_PKEY_set1_RSA(pk, rsa); 416 if (rsa_config.outformat == FORMAT_PVK) 417 i = i2b_PVK_bio(out, pk, rsa_config.pvk_encr, 0, 418 passout); 419 else if (rsa_config.pubin || rsa_config.pubout) 420 i = i2b_PublicKey_bio(out, pk); 421 else 422 i = i2b_PrivateKey_bio(out, pk); 423 EVP_PKEY_free(pk); 424 #endif 425 } else { 426 BIO_printf(bio_err, 427 "bad output format specified for outfile\n"); 428 goto end; 429 } 430 if (i <= 0) { 431 BIO_printf(bio_err, "unable to write key\n"); 432 ERR_print_errors(bio_err); 433 } else 434 ret = 0; 435 436 end: 437 BIO_free_all(out); 438 RSA_free(rsa); 439 free(passin); 440 free(passout); 441 442 return (ret); 443 } 444