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 OPENSSL_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 #include <openssl/engine.h>
  72
  73 #undef PROG
  74 #define PROG    rsa_main
  75
  76 /* -inform arg  - input format - default PEM (one of DER, NET or PEM)
  77  * -outform arg - output format - default PEM
  78  * -in arg      - input file - default stdin
  79  * -out arg     - output file - default stdout
  80  * -des         - encrypt output if PEM format with DES in cbc mode
  81  * -des3        - encrypt output if PEM format
  82  * -idea        - encrypt output if PEM format
  83  * -text        - print a text version
  84  * -modulus     - print the RSA key modulus
  85  * -check       - verify key consistency
  86  * -pubin       - Expect a public key in input file.
  87  * -pubout      - Output a public key.
  88  */
  89
  90 int MAIN(int, char **);
  91
  92 int MAIN(int argc, char **argv)
  93         {
  94         ENGINE *e = NULL;
  95         int ret=1;
  96         RSA *rsa=NULL;
  97         int i,badops=0, sgckey=0;
  98         const EVP_CIPHER *enc=NULL;
  99         BIO *in=NULL,*out=NULL;
 100         int informat,outformat,text=0,check=0,noout=0;
 101         int pubin = 0, pubout = 0;
 102         char *infile,*outfile,*prog;
 103         char *passargin = NULL, *passargout = NULL;
 104         char *passin = NULL, *passout = NULL;
 105         char *engine=NULL;
 106         int modulus=0;
 107
 108         apps_startup();
 109
 110         if (bio_err == NULL)
 111                 if ((bio_err=BIO_new(BIO_s_file())) != NULL)
 112                         BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT);
 113
 114         infile=NULL;
 115         outfile=NULL;
 116         informat=FORMAT_PEM;
 117         outformat=FORMAT_PEM;
 118
 119         prog=argv[0];
 120         argc--;
 121         argv++;
 122         while (argc >= 1)
 123                 {
 124                 if      (strcmp(*argv,"-inform") == 0)
 125                         {
 126                         if (--argc < 1) goto bad;
 127                         informat=str2fmt(*(++argv));
 128                         }
 129                 else if (strcmp(*argv,"-outform") == 0)
 130                         {
 131                         if (--argc < 1) goto bad;
 132                         outformat=str2fmt(*(++argv));
 133                         }
 134                 else if (strcmp(*argv,"-in") == 0)
 135                         {
 136                         if (--argc < 1) goto bad;
 137                         infile= *(++argv);
 138                         }
 139                 else if (strcmp(*argv,"-out") == 0)
 140                         {
 141                         if (--argc < 1) goto bad;
 142                         outfile= *(++argv);
 143                         }
 144                 else if (strcmp(*argv,"-passin") == 0)
 145                         {
 146                         if (--argc < 1) goto bad;
 147                         passargin= *(++argv);
 148                         }
 149                 else if (strcmp(*argv,"-passout") == 0)
 150                         {
 151                         if (--argc < 1) goto bad;
 152                         passargout= *(++argv);
 153                         }
 154                 else if (strcmp(*argv,"-engine") == 0)
 155                         {
 156                         if (--argc < 1) goto bad;
 157                         engine= *(++argv);
 158                         }
 159                 else if (strcmp(*argv,"-sgckey") == 0)
 160                         sgckey=1;
 161                 else if (strcmp(*argv,"-pubin") == 0)
 162                         pubin=1;
 163                 else if (strcmp(*argv,"-pubout") == 0)
 164                         pubout=1;
 165                 else if (strcmp(*argv,"-noout") == 0)
 166                         noout=1;
 167                 else if (strcmp(*argv,"-text") == 0)
 168                         text=1;
 169                 else if (strcmp(*argv,"-modulus") == 0)
 170                         modulus=1;
 171                 else if (strcmp(*argv,"-check") == 0)
 172                         check=1;
 173                 else if ((enc=EVP_get_cipherbyname(&(argv[0][1]))) == NULL)
 174                         {
 175                         BIO_printf(bio_err,"unknown option %s\n",*argv);
 176                         badops=1;
 177                         break;
 178                         }
 179                 argc--;
 180                 argv++;
 181                 }
 182
 183         if (badops)
 184                 {
 185 bad:
 186                 BIO_printf(bio_err,"%s [options] <infile >outfile\n",prog);
 187                 BIO_printf(bio_err,"where options are\n");
 188                 BIO_printf(bio_err," -inform arg     input format - one of DER NET PEM\n");
 189                 BIO_printf(bio_err," -outform arg    output format - one of DER NET PEM\n");
 190                 BIO_printf(bio_err," -in arg         input file\n");
 191                 BIO_printf(bio_err," -sgckey         Use IIS SGC key format\n");
 192                 BIO_printf(bio_err," -passin arg     input file pass phrase source\n");
 193                 BIO_printf(bio_err," -out arg        output file\n");
 194                 BIO_printf(bio_err," -passout arg    output file pass phrase source\n");
 195                 BIO_printf(bio_err," -des            encrypt PEM output with cbc des\n");
 196                 BIO_printf(bio_err," -des3           encrypt PEM output with ede cbc des using 168 bit key\n");
 197 #ifndef OPENSSL_NO_IDEA
 198                 BIO_printf(bio_err," -idea           encrypt PEM output with cbc idea\n");
 199 #endif
 200                 BIO_printf(bio_err," -text           print the key in text\n");
 201                 BIO_printf(bio_err," -noout          don't print key out\n");
 202                 BIO_printf(bio_err," -modulus        print the RSA key modulus\n");
 203                 BIO_printf(bio_err," -check          verify key consistency\n");
 204                 BIO_printf(bio_err," -pubin          expect a public key in input file\n");
 205                 BIO_printf(bio_err," -pubout         output a public key\n");
 206                 BIO_printf(bio_err," -engine e       use engine e, possibly a hardware device.\n");
 207                 goto end;
 208                 }
 209
 210         ERR_load_crypto_strings();
 211
 212         e = setup_engine(bio_err, engine, 0);
 213
 214         if(!app_passwd(bio_err, passargin, passargout, &passin, &passout)) {
 215                 BIO_printf(bio_err, "Error getting passwords\n");
 216                 goto end;
 217         }
 218
 219         if(check && pubin) {
 220                 BIO_printf(bio_err, "Only private keys can be checked\n");
 221                 goto end;
 222         }
 223
 224         in=BIO_new(BIO_s_file());
 225         out=BIO_new(BIO_s_file());
 226         if ((in == NULL) || (out == NULL))
 227                 {
 228                 ERR_print_errors(bio_err);
 229                 goto end;
 230                 }
 231
 232         if (infile == NULL)
 233                 BIO_set_fp(in,stdin,BIO_NOCLOSE);
 234         else
 235                 {
 236                 if (BIO_read_filename(in,infile) <= 0)
 237                         {
 238                         perror(infile);
 239                         goto end;
 240                         }
 241                 }
 242
 243         BIO_printf(bio_err,"read RSA key\n");
 244         if      (informat == FORMAT_ASN1) {
 245                 if (pubin) rsa=d2i_RSA_PUBKEY_bio(in,NULL);
 246                 else rsa=d2i_RSAPrivateKey_bio(in,NULL);
 247         }
 248 #ifndef OPENSSL_NO_RC4
 249         else if (informat == FORMAT_NETSCAPE)
 250                 {
 251                 BUF_MEM *buf=NULL;
 252                 const unsigned char *p;
 253                 int size=0;
 254
 255                 buf=BUF_MEM_new();
 256                 for (;;)
 257                         {
 258                         if ((buf == NULL) || (!BUF_MEM_grow(buf,size+1024*10)))
 259                                 goto end;
 260                         i=BIO_read(in,&(buf->data[size]),1024*10);
 261                         size+=i;
 262                         if (i == 0) break;
 263                         if (i < 0)
 264                                 {
 265                                 perror("reading private key");
 266                                 BUF_MEM_free(buf);
 267                                 goto end;
 268                                 }
 269                         }
 270                 p=(unsigned char *)buf->data;
 271                 rsa=d2i_RSA_NET(NULL,&p,(long)size,NULL, sgckey);
 272                 BUF_MEM_free(buf);
 273                 }
 274 #endif
 275         else if (informat == FORMAT_PEM) {
 276                 if(pubin) rsa=PEM_read_bio_RSA_PUBKEY(in,NULL,NULL,NULL);
 277                 else rsa=PEM_read_bio_RSAPrivateKey(in,NULL, NULL,passin);
 278         }
 279         else
 280                 {
 281                 BIO_printf(bio_err,"bad input format specified for key\n");
 282                 goto end;
 283                 }
 284         if (rsa == NULL)
 285                 {
 286                 BIO_printf(bio_err,"unable to load key\n");
 287                 ERR_print_errors(bio_err);
 288                 goto end;
 289                 }
 290
 291         if (outfile == NULL)
 292                 {
 293                 BIO_set_fp(out,stdout,BIO_NOCLOSE);
 294 #ifdef OPENSSL_SYS_VMS
 295                 {
 296                 BIO *tmpbio = BIO_new(BIO_f_linebuffer());
 297                 out = BIO_push(tmpbio, out);
 298                 }
 299 #endif
 300                 }
 301         else
 302                 {
 303                 if (BIO_write_filename(out,outfile) <= 0)
 304                         {
 305                         perror(outfile);
 306                         goto end;
 307                         }
 308                 }
 309
 310         if (text)
 311                 if (!RSA_print(out,rsa,0))
 312                         {
 313                         perror(outfile);
 314                         ERR_print_errors(bio_err);
 315                         goto end;
 316                         }
 317
 318         if (modulus)
 319                 {
 320                 BIO_printf(out,"Modulus=");
 321                 BN_print(out,rsa->n);
 322                 BIO_printf(out,"\n");
 323                 }
 324
 325         if (check)
 326                 {
 327                 int r = RSA_check_key(rsa);
 328
 329                 if (r == 1)
 330                         BIO_printf(out,"RSA key ok\n");
 331                 else if (r == 0)
 332                         {
 333                         long err;
 334
 335                         while ((err = ERR_peek_error()) != 0 &&
 336                                 ERR_GET_LIB(err) == ERR_LIB_RSA &&
 337                                 ERR_GET_FUNC(err) == RSA_F_RSA_CHECK_KEY &&
 338                                 ERR_GET_REASON(err) != ERR_R_MALLOC_FAILURE)
 339                                 {
 340                                 BIO_printf(out, "RSA key error: %s\n", ERR_reason_error_string(err));
 341                                 ERR_get_error(); /* remove e from error stack */
 342                                 }
 343                         }
 344
 345                 if (r == -1 || ERR_peek_error() != 0) /* should happen only if r == -1 */
 346                         {
 347                         ERR_print_errors(bio_err);
 348                         goto end;
 349                         }
 350                 }
 351
 352         if (noout)
 353                 {
 354                 ret = 0;
 355                 goto end;
 356                 }
 357         BIO_printf(bio_err,"writing RSA key\n");
 358         if      (outformat == FORMAT_ASN1) {
 359                 if(pubout || pubin) i=i2d_RSA_PUBKEY_bio(out,rsa);
 360                 else i=i2d_RSAPrivateKey_bio(out,rsa);
 361         }
 362 #ifndef OPENSSL_NO_RC4
 363         else if (outformat == FORMAT_NETSCAPE)
 364                 {
 365                 unsigned char *p,*pp;
 366                 int size;
 367
 368                 i=1;
 369                 size=i2d_RSA_NET(rsa,NULL,NULL, sgckey);
 370                 if ((p=(unsigned char *)OPENSSL_malloc(size)) == NULL)
 371                         {
 372                         BIO_printf(bio_err,"Memory allocation failure\n");
 373                         goto end;
 374                         }
 375                 pp=p;
 376                 i2d_RSA_NET(rsa,&p,NULL, sgckey);
 377                 BIO_write(out,(char *)pp,size);
 378                 OPENSSL_free(pp);
 379                 }
 380 #endif
 381         else if (outformat == FORMAT_PEM) {
 382                 if(pubout || pubin)
 383                     i=PEM_write_bio_RSA_PUBKEY(out,rsa);
 384                 else i=PEM_write_bio_RSAPrivateKey(out,rsa,
 385                                                 enc,NULL,0,NULL,passout);
 386         } else  {
 387                 BIO_printf(bio_err,"bad output format specified for outfile\n");
 388                 goto end;
 389                 }
 390         if (!i)
 391                 {
 392                 BIO_printf(bio_err,"unable to write key\n");
 393                 ERR_print_errors(bio_err);
 394                 }
 395         else
 396                 ret=0;
 397 end:
 398         if(in != NULL) BIO_free(in);
 399         if(out != NULL) BIO_free_all(out);
 400         if(rsa != NULL) RSA_free(rsa);
 401         if(passin) OPENSSL_free(passin);
 402         if(passout) OPENSSL_free(passout);
 403         apps_shutdown();
 404         EXIT(ret);
 405         }
 406 #else /* !OPENSSL_NO_RSA */
 407
 408 # if PEDANTIC
 409 static void *dummy=&dummy;
 410 # endif
 411
 412 #endif