bin/openssl/rsa.c

   1 /* $OpenBSD: rsa.c,v 1.10 2018/02/07 05:47:55 jsing 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 cpath wpath rpath 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 }