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  */
  86
  87 int MAIN(int argc, char **argv)
  88         {
  89         int ret=1;
  90         RSA *rsa=NULL;
  91         int i,badops=0;
  92         const EVP_CIPHER *enc=NULL;
  93         BIO *in=NULL,*out=NULL;
  94         int informat,outformat,text=0,check=0,noout=0;
  95         char *infile,*outfile,*prog;
  96         int modulus=0;
  97
  98         apps_startup();
  99
 100         if (bio_err == NULL)
 101                 if ((bio_err=BIO_new(BIO_s_file())) != NULL)
 102                         BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT);
 103
 104         infile=NULL;
 105         outfile=NULL;
 106         informat=FORMAT_PEM;
 107         outformat=FORMAT_PEM;
 108
 109         prog=argv[0];
 110         argc--;
 111         argv++;
 112         while (argc >= 1)
 113                 {
 114                 if      (strcmp(*argv,"-inform") == 0)
 115                         {
 116                         if (--argc < 1) goto bad;
 117                         informat=str2fmt(*(++argv));
 118                         }
 119                 else if (strcmp(*argv,"-outform") == 0)
 120                         {
 121                         if (--argc < 1) goto bad;
 122                         outformat=str2fmt(*(++argv));
 123                         }
 124                 else if (strcmp(*argv,"-in") == 0)
 125                         {
 126                         if (--argc < 1) goto bad;
 127                         infile= *(++argv);
 128                         }
 129                 else if (strcmp(*argv,"-out") == 0)
 130                         {
 131                         if (--argc < 1) goto bad;
 132                         outfile= *(++argv);
 133                         }
 134                 else if (strcmp(*argv,"-noout") == 0)
 135                         noout=1;
 136                 else if (strcmp(*argv,"-text") == 0)
 137                         text=1;
 138                 else if (strcmp(*argv,"-modulus") == 0)
 139                         modulus=1;
 140                 else if (strcmp(*argv,"-check") == 0)
 141                         check=1;
 142                 else if ((enc=EVP_get_cipherbyname(&(argv[0][1]))) == NULL)
 143                         {
 144                         BIO_printf(bio_err,"unknown option %s\n",*argv);
 145                         badops=1;
 146                         break;
 147                         }
 148                 argc--;
 149                 argv++;
 150                 }
 151
 152         if (badops)
 153                 {
 154 bad:
 155                 BIO_printf(bio_err,"%s [options] <infile >outfile\n",prog);
 156                 BIO_printf(bio_err,"where options are\n");
 157                 BIO_printf(bio_err," -inform arg   input format - one of DER NET PEM\n");
 158                 BIO_printf(bio_err," -outform arg  output format - one of DER NET PEM\n");
 159                 BIO_printf(bio_err," -in arg       input file\n");
 160                 BIO_printf(bio_err," -out arg      output file\n");
 161                 BIO_printf(bio_err," -des          encrypt PEM output with cbc des\n");
 162                 BIO_printf(bio_err," -des3         encrypt PEM output with ede cbc des using 168 bit key\n");
 163 #ifndef NO_IDEA
 164                 BIO_printf(bio_err," -idea         encrypt PEM output with cbc idea\n");
 165 #endif
 166                 BIO_printf(bio_err," -text         print the key in text\n");
 167                 BIO_printf(bio_err," -noout        don't print key out\n");
 168                 BIO_printf(bio_err," -modulus      print the RSA key modulus\n");
 169                 BIO_printf(bio_err," -check        verify key consistency\n");
 170                 goto end;
 171                 }
 172
 173         ERR_load_crypto_strings();
 174
 175         in=BIO_new(BIO_s_file());
 176         out=BIO_new(BIO_s_file());
 177         if ((in == NULL) || (out == NULL))
 178                 {
 179                 ERR_print_errors(bio_err);
 180                 goto end;
 181                 }
 182
 183         if (infile == NULL)
 184                 BIO_set_fp(in,stdin,BIO_NOCLOSE);
 185         else
 186                 {
 187                 if (BIO_read_filename(in,infile) <= 0)
 188                         {
 189                         perror(infile);
 190                         goto end;
 191                         }
 192                 }
 193
 194         BIO_printf(bio_err,"read RSA private key\n");
 195         if      (informat == FORMAT_ASN1)
 196                 rsa=d2i_RSAPrivateKey_bio(in,NULL);
 197 #ifndef NO_RC4
 198         else if (informat == FORMAT_NETSCAPE)
 199                 {
 200                 BUF_MEM *buf=NULL;
 201                 unsigned char *p;
 202                 int size=0;
 203
 204                 buf=BUF_MEM_new();
 205                 for (;;)
 206                         {
 207                         if ((buf == NULL) || (!BUF_MEM_grow(buf,size+1024*10)))
 208                                 goto end;
 209                         i=BIO_read(in,&(buf->data[size]),1024*10);
 210                         size+=i;
 211                         if (i == 0) break;
 212                         if (i < 0)
 213                                 {
 214                                 perror("reading private key");
 215                                 BUF_MEM_free(buf);
 216                                 goto end;
 217                                 }
 218                         }
 219                 p=(unsigned char *)buf->data;
 220                 rsa=(RSA *)d2i_Netscape_RSA(NULL,&p,(long)size,NULL);
 221                 BUF_MEM_free(buf);
 222                 }
 223 #endif
 224         else if (informat == FORMAT_PEM)
 225                 rsa=PEM_read_bio_RSAPrivateKey(in,NULL,NULL,NULL);
 226         else
 227                 {
 228                 BIO_printf(bio_err,"bad input format specified for key\n");
 229                 goto end;
 230                 }
 231         if (rsa == NULL)
 232                 {
 233                 BIO_printf(bio_err,"unable to load Private Key\n");
 234                 ERR_print_errors(bio_err);
 235                 goto end;
 236                 }
 237
 238         if (outfile == NULL)
 239                 BIO_set_fp(out,stdout,BIO_NOCLOSE);
 240         else
 241                 {
 242                 if (BIO_write_filename(out,outfile) <= 0)
 243                         {
 244                         perror(outfile);
 245                         goto end;
 246                         }
 247                 }
 248
 249         if (text)
 250                 if (!RSA_print(out,rsa,0))
 251                         {
 252                         perror(outfile);
 253                         ERR_print_errors(bio_err);
 254                         goto end;
 255                         }
 256
 257         if (modulus)
 258                 {
 259                 fprintf(stdout,"Modulus=");
 260                 BN_print(out,rsa->n);
 261                 fprintf(stdout,"\n");
 262                 }
 263
 264         if (check)
 265                 {
 266                 int r = RSA_check_key(rsa);
 267
 268                 if (r == 1)
 269                         BIO_printf(out,"RSA key ok\n");
 270                 else if (r == 0)
 271                         {
 272                         long e;
 273
 274                         while ((e = ERR_peek_error()) != 0 &&
 275                                 ERR_GET_LIB(e) == ERR_LIB_RSA &&
 276                                 ERR_GET_FUNC(e) == RSA_F_RSA_CHECK_KEY &&
 277                                 ERR_GET_REASON(e) != ERR_R_MALLOC_FAILURE)
 278                                 {
 279                                 BIO_printf(out, "RSA key error: %s\n", ERR_reason_error_string(e));
 280                                 ERR_get_error(); /* remove e from error stack */
 281                                 }
 282                         }
 283
 284                 if (r == -1 || ERR_peek_error() != 0) /* should happen only if r == -1 */
 285                         {
 286                         ERR_print_errors(bio_err);
 287                         goto end;
 288                         }
 289                 }
 290
 291         if (noout)
 292                 {
 293                 ret = 0;
 294                 goto end;
 295                 }
 296         BIO_printf(bio_err,"writing RSA private key\n");
 297         if      (outformat == FORMAT_ASN1)
 298                 i=i2d_RSAPrivateKey_bio(out,rsa);
 299 #ifndef NO_RC4
 300         else if (outformat == FORMAT_NETSCAPE)
 301                 {
 302                 unsigned char *p,*pp;
 303                 int size;
 304
 305                 i=1;
 306                 size=i2d_Netscape_RSA(rsa,NULL,NULL);
 307                 if ((p=(unsigned char *)Malloc(size)) == NULL)
 308                         {
 309                         BIO_printf(bio_err,"Malloc failure\n");
 310                         goto end;
 311                         }
 312                 pp=p;
 313                 i2d_Netscape_RSA(rsa,&p,NULL);
 314                 BIO_write(out,(char *)pp,size);
 315                 Free(pp);
 316                 }
 317 #endif
 318         else if (outformat == FORMAT_PEM)
 319                 i=PEM_write_bio_RSAPrivateKey(out,rsa,enc,NULL,0,NULL,NULL);
 320         else    {
 321                 BIO_printf(bio_err,"bad output format specified for outfile\n");
 322                 goto end;
 323                 }
 324         if (!i)
 325                 {
 326                 BIO_printf(bio_err,"unable to write private key\n");
 327                 ERR_print_errors(bio_err);
 328                 }
 329         else
 330                 ret=0;
 331 end:
 332         if (in != NULL) BIO_free(in);
 333         if (out != NULL) BIO_free(out);
 334         if (rsa != NULL) RSA_free(rsa);
 335         EXIT(ret);
 336         }
 337 #endif