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