1 /* $OpenBSD: rsa.c,v 1.16 2022/01/14 09:26:41 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 } rsa_config; 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 ((rsa_config.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 = &rsa_config.check, 117 }, 118 { 119 .name = "in", 120 .argname = "file", 121 .desc = "Input file (default stdin)", 122 .type = OPTION_ARG, 123 .opt.arg = &rsa_config.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 = &rsa_config.informat, 131 }, 132 { 133 .name = "modulus", 134 .desc = "Print the RSA key modulus", 135 .type = OPTION_FLAG, 136 .opt.flag = &rsa_config.modulus, 137 }, 138 { 139 .name = "noout", 140 .desc = "Do not print encoded version of the key", 141 .type = OPTION_FLAG, 142 .opt.flag = &rsa_config.noout, 143 }, 144 { 145 .name = "out", 146 .argname = "file", 147 .desc = "Output file (default stdout)", 148 .type = OPTION_ARG, 149 .opt.arg = &rsa_config.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 = &rsa_config.outformat, 157 }, 158 { 159 .name = "passin", 160 .argname = "src", 161 .desc = "Input file passphrase source", 162 .type = OPTION_ARG, 163 .opt.arg = &rsa_config.passargin, 164 }, 165 { 166 .name = "passout", 167 .argname = "src", 168 .desc = "Output file passphrase source", 169 .type = OPTION_ARG, 170 .opt.arg = &rsa_config.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 = &rsa_config.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 = &rsa_config.pubout, 185 }, 186 { 187 .name = "pvk-none", 188 .type = OPTION_VALUE, 189 .value = 0, 190 .opt.value = &rsa_config.pvk_encr, 191 }, 192 { 193 .name = "pvk-strong", 194 .type = OPTION_VALUE, 195 .value = 2, 196 .opt.value = &rsa_config.pvk_encr, 197 }, 198 { 199 .name = "pvk-weak", 200 .type = OPTION_VALUE, 201 .value = 1, 202 .opt.value = &rsa_config.pvk_encr, 203 }, 204 { 205 .name = "RSAPublicKey_in", 206 .type = OPTION_VALUE, 207 .value = 2, 208 .opt.value = &rsa_config.pubin, 209 }, 210 { 211 .name = "RSAPublicKey_out", 212 .type = OPTION_VALUE, 213 .value = 2, 214 .opt.value = &rsa_config.pubout, 215 }, 216 { 217 .name = "text", 218 .desc = "Print in plain text in addition to encoded", 219 .type = OPTION_FLAG, 220 .opt.flag = &rsa_config.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() 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 (single_execution) { 259 if (pledge("stdio cpath wpath rpath tty", NULL) == -1) { 260 perror("pledge"); 261 exit(1); 262 } 263 } 264 265 memset(&rsa_config, 0, sizeof(rsa_config)); 266 rsa_config.pvk_encr = 2; 267 rsa_config.informat = FORMAT_PEM; 268 rsa_config.outformat = FORMAT_PEM; 269 270 if (options_parse(argc, argv, rsa_options, NULL, NULL) != 0) { 271 rsa_usage(); 272 goto end; 273 } 274 275 if (!app_passwd(bio_err, rsa_config.passargin, rsa_config.passargout, 276 &passin, &passout)) { 277 BIO_printf(bio_err, "Error getting passwords\n"); 278 goto end; 279 } 280 if (rsa_config.check && rsa_config.pubin) { 281 BIO_printf(bio_err, "Only private keys can be checked\n"); 282 goto end; 283 } 284 out = BIO_new(BIO_s_file()); 285 286 { 287 EVP_PKEY *pkey; 288 289 if (rsa_config.pubin) { 290 int tmpformat = -1; 291 if (rsa_config.pubin == 2) { 292 if (rsa_config.informat == FORMAT_PEM) 293 tmpformat = FORMAT_PEMRSA; 294 else if (rsa_config.informat == FORMAT_ASN1) 295 tmpformat = FORMAT_ASN1RSA; 296 } else 297 tmpformat = rsa_config.informat; 298 299 pkey = load_pubkey(bio_err, rsa_config.infile, 300 tmpformat, 1, passin, "Public Key"); 301 } else 302 pkey = load_key(bio_err, rsa_config.infile, 303 rsa_config.informat, 1, passin, "Private Key"); 304 305 if (pkey != NULL) 306 rsa = EVP_PKEY_get1_RSA(pkey); 307 EVP_PKEY_free(pkey); 308 } 309 310 if (rsa == NULL) { 311 ERR_print_errors(bio_err); 312 goto end; 313 } 314 if (rsa_config.outfile == NULL) { 315 BIO_set_fp(out, stdout, BIO_NOCLOSE); 316 } else { 317 if (BIO_write_filename(out, rsa_config.outfile) <= 0) { 318 perror(rsa_config.outfile); 319 goto end; 320 } 321 } 322 323 if (rsa_config.text) 324 if (!RSA_print(out, rsa, 0)) { 325 perror(rsa_config.outfile); 326 ERR_print_errors(bio_err); 327 goto end; 328 } 329 if (rsa_config.modulus) { 330 BIO_printf(out, "Modulus="); 331 BN_print(out, RSA_get0_n(rsa)); 332 BIO_printf(out, "\n"); 333 } 334 if (rsa_config.check) { 335 int r = RSA_check_key(rsa); 336 337 if (r == 1) 338 BIO_printf(out, "RSA key ok\n"); 339 else if (r == 0) { 340 unsigned long err; 341 342 while ((err = ERR_peek_error()) != 0 && 343 ERR_GET_LIB(err) == ERR_LIB_RSA && 344 ERR_GET_FUNC(err) == RSA_F_RSA_CHECK_KEY && 345 ERR_GET_REASON(err) != ERR_R_MALLOC_FAILURE) { 346 BIO_printf(out, "RSA key error: %s\n", 347 ERR_reason_error_string(err)); 348 ERR_get_error(); /* remove e from error 349 * stack */ 350 } 351 } 352 if (r == -1 || ERR_peek_error() != 0) { /* should happen only if 353 * r == -1 */ 354 ERR_print_errors(bio_err); 355 goto end; 356 } 357 } 358 if (rsa_config.noout) { 359 ret = 0; 360 goto end; 361 } 362 BIO_printf(bio_err, "writing RSA key\n"); 363 if (rsa_config.outformat == FORMAT_ASN1) { 364 if (rsa_config.pubout || rsa_config.pubin) { 365 if (rsa_config.pubout == 2) 366 i = i2d_RSAPublicKey_bio(out, rsa); 367 else 368 i = i2d_RSA_PUBKEY_bio(out, rsa); 369 } else 370 i = i2d_RSAPrivateKey_bio(out, rsa); 371 } else if (rsa_config.outformat == FORMAT_PEM) { 372 if (rsa_config.pubout || rsa_config.pubin) { 373 if (rsa_config.pubout == 2) 374 i = PEM_write_bio_RSAPublicKey(out, rsa); 375 else 376 i = PEM_write_bio_RSA_PUBKEY(out, rsa); 377 } else 378 i = PEM_write_bio_RSAPrivateKey(out, rsa, 379 rsa_config.enc, NULL, 0, NULL, passout); 380 #if !defined(OPENSSL_NO_DSA) && !defined(OPENSSL_NO_RC4) 381 } else if (rsa_config.outformat == FORMAT_MSBLOB || 382 rsa_config.outformat == FORMAT_PVK) { 383 EVP_PKEY *pk; 384 pk = EVP_PKEY_new(); 385 EVP_PKEY_set1_RSA(pk, rsa); 386 if (rsa_config.outformat == FORMAT_PVK) 387 i = i2b_PVK_bio(out, pk, rsa_config.pvk_encr, 0, 388 passout); 389 else if (rsa_config.pubin || rsa_config.pubout) 390 i = i2b_PublicKey_bio(out, pk); 391 else 392 i = i2b_PrivateKey_bio(out, pk); 393 EVP_PKEY_free(pk); 394 #endif 395 } else { 396 BIO_printf(bio_err, 397 "bad output format specified for outfile\n"); 398 goto end; 399 } 400 if (i <= 0) { 401 BIO_printf(bio_err, "unable to write key\n"); 402 ERR_print_errors(bio_err); 403 } else 404 ret = 0; 405 406 end: 407 BIO_free_all(out); 408 RSA_free(rsa); 409 free(passin); 410 free(passout); 411 412 return (ret); 413 } 414