apps/rsa.c

   1 /* apps/rsa.c */
   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 #ifndef NO_RSA
  60 #include <stdio.h>
  61 #include <stdlib.h>
  62 #include <string.h>
  63 #include <time.h>
  64 #include "apps.h"
  65 #include <openssl/bio.h>
  66 #include <openssl/err.h>
  67 #include <openssl/rsa.h>
  68 #include <openssl/evp.h>
  69 #include <openssl/x509.h>
  70 #include <openssl/pem.h>
  71
  72 #undef PROG
  73 #define PROG    rsa_main
  74
  75 /* -inform arg  - input format - default PEM (one of DER, NET or PEM)
  76  * -outform arg - output format - default PEM
  77  * -in arg      - input file - default stdin
  78  * -out arg     - output file - default stdout
  79  * -des         - encrypt output if PEM format with DES in cbc mode
  80  * -des3        - encrypt output if PEM format
  81  * -idea        - encrypt output if PEM format
  82  * -text        - print a text version
  83  * -modulus     - print the RSA key modulus
  84  * -check       - verify key consistency
  85  * -pubin       - Expect a public key in input file.
  86  * -pubout      - Output a public key.
  87  */
  88
  89 int MAIN(int argc, char **argv)
  90         {
  91         int ret=1;
  92         RSA *rsa=NULL;
  93         int i,badops=0;
  94         const EVP_CIPHER *enc=NULL;
  95         BIO *in=NULL,*out=NULL;
  96         int informat,outformat,text=0,check=0,noout=0;
  97         int pubin = 0, pubout = 0;
  98         char *infile,*outfile,*prog;
  99         char *passin = NULL, *passout = NULL;
 100         int modulus=0;
 101
 102         apps_startup();
 103
 104         if (bio_err == NULL)
 105                 if ((bio_err=BIO_new(BIO_s_file())) != NULL)
 106                         BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT);
 107
 108         infile=NULL;
 109         outfile=NULL;
 110         informat=FORMAT_PEM;
 111         outformat=FORMAT_PEM;
 112
 113         prog=argv[0];
 114         argc--;
 115         argv++;
 116         while (argc >= 1)
 117                 {
 118                 if      (strcmp(*argv,"-inform") == 0)
 119                         {
 120                         if (--argc < 1) goto bad;
 121                         informat=str2fmt(*(++argv));
 122                         }
 123                 else if (strcmp(*argv,"-outform") == 0)
 124                         {
 125                         if (--argc < 1) goto bad;
 126                         outformat=str2fmt(*(++argv));
 127                         }
 128                 else if (strcmp(*argv,"-in") == 0)
 129                         {
 130                         if (--argc < 1) goto bad;
 131                         infile= *(++argv);
 132                         }
 133                 else if (strcmp(*argv,"-out") == 0)
 134                         {
 135                         if (--argc < 1) goto bad;
 136                         outfile= *(++argv);
 137                         }
 138                 else if (strcmp(*argv,"-passin") == 0)
 139                         {
 140                         if (--argc < 1) goto bad;
 141                         passin= *(++argv);
 142                         }
 143                 else if (strcmp(*argv,"-envpassin") == 0)
 144                         {
 145                         if (--argc < 1) goto bad;
 146                                 if(!(passin= getenv(*(++argv))))
 147                                 {
 148                                 BIO_printf(bio_err,
 149                                  "Can't read environment variable %s\n",
 150                                                                 *argv);
 151                                 badops = 1;
 152                                 }
 153                         }
 154                 else if (strcmp(*argv,"-envpassout") == 0)
 155                         {
 156                         if (--argc < 1) goto bad;
 157                                 if(!(passout= getenv(*(++argv))))
 158                                 {
 159                                 BIO_printf(bio_err,
 160                                  "Can't read environment variable %s\n",
 161                                                                 *argv);
 162                                 badops = 1;
 163                                 }
 164                         argv++;
 165                         }
 166                 else if (strcmp(*argv,"-passout") == 0)
 167                         {
 168                         if (--argc < 1) goto bad;
 169                         passout= *(++argv);
 170                         }
 171                 else if (strcmp(*argv,"-pubin") == 0)
 172                         pubin=1;
 173                 else if (strcmp(*argv,"-pubout") == 0)
 174                         pubout=1;
 175                 else if (strcmp(*argv,"-noout") == 0)
 176                         noout=1;
 177                 else if (strcmp(*argv,"-text") == 0)
 178                         text=1;
 179                 else if (strcmp(*argv,"-modulus") == 0)
 180                         modulus=1;
 181                 else if (strcmp(*argv,"-check") == 0)
 182                         check=1;
 183                 else if ((enc=EVP_get_cipherbyname(&(argv[0][1]))) == NULL)
 184                         {
 185                         BIO_printf(bio_err,"unknown option %s\n",*argv);
 186                         badops=1;
 187                         break;
 188                         }
 189                 argc--;
 190                 argv++;
 191                 }
 192
 193         if (badops)
 194                 {
 195 bad:
 196                 BIO_printf(bio_err,"%s [options] <infile >outfile\n",prog);
 197                 BIO_printf(bio_err,"where options are\n");
 198                 BIO_printf(bio_err," -inform arg     input format - one of DER NET PEM\n");
 199                 BIO_printf(bio_err," -outform arg    output format - one of DER NET PEM\n");
 200                 BIO_printf(bio_err," -in arg         input file\n");
 201                 BIO_printf(bio_err," -passin arg     input file pass phrase\n");
 202                 BIO_printf(bio_err," -envpassin arg  environment variable containing input file pass phrase\n");
 203                 BIO_printf(bio_err," -in arg         input file\n");
 204                 BIO_printf(bio_err," -out arg        output file\n");
 205                 BIO_printf(bio_err," -passout arg    input file pass phrase\n");
 206                 BIO_printf(bio_err," -envpassout arg environment variable containing input file pass phrase\n");
 207                 BIO_printf(bio_err," -des            encrypt PEM output with cbc des\n");
 208                 BIO_printf(bio_err," -des3           encrypt PEM output with ede cbc des using 168 bit key\n");
 209 #ifndef NO_IDEA
 210                 BIO_printf(bio_err," -idea           encrypt PEM output with cbc idea\n");
 211 #endif
 212                 BIO_printf(bio_err," -text           print the key in text\n");
 213                 BIO_printf(bio_err," -noout          don't print key out\n");
 214                 BIO_printf(bio_err," -modulus        print the RSA key modulus\n");
 215                 BIO_printf(bio_err," -check          verify key consistency\n");
 216                 BIO_printf(bio_err," -pubin          expect a public key in input file\n");
 217                 BIO_printf(bio_err," -pubout         output a public key\n");
 218                 goto end;
 219                 }
 220
 221         ERR_load_crypto_strings();
 222
 223         if(check && pubin) {
 224                 BIO_printf(bio_err, "Only private keys can be checked\n");
 225                 goto end;
 226         }
 227
 228         in=BIO_new(BIO_s_file());
 229         out=BIO_new(BIO_s_file());
 230         if ((in == NULL) || (out == NULL))
 231                 {
 232                 ERR_print_errors(bio_err);
 233                 goto end;
 234                 }
 235
 236         if (infile == NULL)
 237                 BIO_set_fp(in,stdin,BIO_NOCLOSE);
 238         else
 239                 {
 240                 if (BIO_read_filename(in,infile) <= 0)
 241                         {
 242                         perror(infile);
 243                         goto end;
 244                         }
 245                 }
 246
 247         BIO_printf(bio_err,"read RSA key\n");
 248         if      (informat == FORMAT_ASN1) {
 249                 if (pubin) rsa=d2i_RSA_PUBKEY_bio(in,NULL);
 250                 else rsa=d2i_RSAPrivateKey_bio(in,NULL);
 251         }
 252 #ifndef NO_RC4
 253         else if (informat == FORMAT_NETSCAPE)
 254                 {
 255                 BUF_MEM *buf=NULL;
 256                 unsigned char *p;
 257                 int size=0;
 258
 259                 buf=BUF_MEM_new();
 260                 for (;;)
 261                         {
 262                         if ((buf == NULL) || (!BUF_MEM_grow(buf,size+1024*10)))
 263                                 goto end;
 264                         i=BIO_read(in,&(buf->data[size]),1024*10);
 265                         size+=i;
 266                         if (i == 0) break;
 267                         if (i < 0)
 268                                 {
 269                                 perror("reading private key");
 270                                 BUF_MEM_free(buf);
 271                                 goto end;
 272                                 }
 273                         }
 274                 p=(unsigned char *)buf->data;
 275                 rsa=(RSA *)d2i_Netscape_RSA(NULL,&p,(long)size,NULL);
 276                 BUF_MEM_free(buf);
 277                 }
 278 #endif
 279         else if (informat == FORMAT_PEM) {
 280                 if(pubin) rsa=PEM_read_bio_RSA_PUBKEY(in,NULL,NULL,NULL);
 281                 else rsa=PEM_read_bio_RSAPrivateKey(in,NULL, PEM_cb,passin);
 282         }
 283         else
 284                 {
 285                 BIO_printf(bio_err,"bad input format specified for key\n");
 286                 goto end;
 287                 }
 288         if (rsa == NULL)
 289                 {
 290                 BIO_printf(bio_err,"unable to load key\n");
 291                 ERR_print_errors(bio_err);
 292                 goto end;
 293                 }
 294
 295         if (outfile == NULL)
 296                 BIO_set_fp(out,stdout,BIO_NOCLOSE);
 297         else
 298                 {
 299                 if (BIO_write_filename(out,outfile) <= 0)
 300                         {
 301                         perror(outfile);
 302                         goto end;
 303                         }
 304                 }
 305
 306         if (text)
 307                 if (!RSA_print(out,rsa,0))
 308                         {
 309                         perror(outfile);
 310                         ERR_print_errors(bio_err);
 311                         goto end;
 312                         }
 313
 314         if (modulus)
 315                 {
 316                 BIO_printf(out,"Modulus=");
 317                 BN_print(out,rsa->n);
 318                 BIO_printf(out,"\n");
 319                 }
 320
 321         if (check)
 322                 {
 323                 int r = RSA_check_key(rsa);
 324
 325                 if (r == 1)
 326                         BIO_printf(out,"RSA key ok\n");
 327                 else if (r == 0)
 328                         {
 329                         long e;
 330
 331                         while ((e = ERR_peek_error()) != 0 &&
 332                                 ERR_GET_LIB(e) == ERR_LIB_RSA &&
 333                                 ERR_GET_FUNC(e) == RSA_F_RSA_CHECK_KEY &&
 334                                 ERR_GET_REASON(e) != ERR_R_MALLOC_FAILURE)
 335                                 {
 336                                 BIO_printf(out, "RSA key error: %s\n", ERR_reason_error_string(e));
 337                                 ERR_get_error(); /* remove e from error stack */
 338                                 }
 339                         }
 340
 341                 if (r == -1 || ERR_peek_error() != 0) /* should happen only if r == -1 */
 342                         {
 343                         ERR_print_errors(bio_err);
 344                         goto end;
 345                         }
 346                 }
 347
 348         if (noout)
 349                 {
 350                 ret = 0;
 351                 goto end;
 352                 }
 353         BIO_printf(bio_err,"writing RSA key\n");
 354         if      (outformat == FORMAT_ASN1) {
 355                 if(pubout || pubin) i=i2d_RSA_PUBKEY_bio(out,rsa);
 356                 else i=i2d_RSAPrivateKey_bio(out,rsa);
 357         }
 358 #ifndef NO_RC4
 359         else if (outformat == FORMAT_NETSCAPE)
 360                 {
 361                 unsigned char *p,*pp;
 362                 int size;
 363
 364                 i=1;
 365                 size=i2d_Netscape_RSA(rsa,NULL,NULL);
 366                 if ((p=(unsigned char *)Malloc(size)) == NULL)
 367                         {
 368                         BIO_printf(bio_err,"Malloc failure\n");
 369                         goto end;
 370                         }
 371                 pp=p;
 372                 i2d_Netscape_RSA(rsa,&p,NULL);
 373                 BIO_write(out,(char *)pp,size);
 374                 Free(pp);
 375                 }
 376 #endif
 377         else if (outformat == FORMAT_PEM) {
 378                 if(pubout || pubin)
 379                     i=PEM_write_bio_RSA_PUBKEY(out,rsa);
 380                 else i=PEM_write_bio_RSAPrivateKey(out,rsa,
 381                                                 enc,NULL,0,PEM_cb,passout);
 382         } else  {
 383                 BIO_printf(bio_err,"bad output format specified for outfile\n");
 384                 goto end;
 385                 }
 386         if (!i)
 387                 {
 388                 BIO_printf(bio_err,"unable to write key\n");
 389                 ERR_print_errors(bio_err);
 390                 }
 391         else
 392                 ret=0;
 393 end:
 394         if (in != NULL) BIO_free(in);
 395         if (out != NULL) BIO_free(out);
 396         if (rsa != NULL) RSA_free(rsa);
 397         EXIT(ret);
 398         }
 399 #endif