apps/genrsa.c

   1 /* apps/genrsa.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 <string.h>
  62 #include <sys/types.h>
  63 #include <sys/stat.h>
  64 #include "apps.h"
  65 #include <openssl/bio.h>
  66 #include <openssl/rand.h>
  67 #include <openssl/err.h>
  68 #include <openssl/bn.h>
  69 #include <openssl/rsa.h>
  70 #include <openssl/evp.h>
  71 #include <openssl/x509.h>
  72 #include <openssl/pem.h>
  73
  74 #define DEFBITS 512
  75 #undef PROG
  76 #define PROG genrsa_main
  77
  78 static void MS_CALLBACK genrsa_cb(int p, int n, void *arg);
  79 static long gr_load_rand(char *names);
  80 int MAIN(int argc, char **argv)
  81         {
  82         int ret=1;
  83         char buffer[200];
  84         RSA *rsa=NULL;
  85         int i,num=DEFBITS;
  86         long rnum=0,l;
  87         EVP_CIPHER *enc=NULL;
  88         unsigned long f4=RSA_F4;
  89         char *outfile=NULL;
  90         char *inrand=NULL,*randfile;
  91         BIO *out=NULL;
  92
  93         apps_startup();
  94
  95         if (bio_err == NULL)
  96                 if ((bio_err=BIO_new(BIO_s_file())) != NULL)
  97                         BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT);
  98         if ((out=BIO_new(BIO_s_file())) == NULL)
  99                 {
 100                 BIO_printf(bio_err,"unable to creat BIO for output\n");
 101                 goto err;
 102                 }
 103
 104         argv++;
 105         argc--;
 106         for (;;)
 107                 {
 108                 if (argc <= 0) break;
 109                 if (strcmp(*argv,"-out") == 0)
 110                         {
 111                         if (--argc < 1) goto bad;
 112                         outfile= *(++argv);
 113                         }
 114                 else if (strcmp(*argv,"-3") == 0)
 115                         f4=3;
 116                 else if (strcmp(*argv,"-F4") == 0)
 117                         f4=RSA_F4;
 118                 else if (strcmp(*argv,"-rand") == 0)
 119                         {
 120                         if (--argc < 1) goto bad;
 121                         inrand= *(++argv);
 122                         }
 123 #ifndef NO_DES
 124                 else if (strcmp(*argv,"-des") == 0)
 125                         enc=EVP_des_cbc();
 126                 else if (strcmp(*argv,"-des3") == 0)
 127                         enc=EVP_des_ede3_cbc();
 128 #endif
 129 #ifndef NO_IDEA
 130                 else if (strcmp(*argv,"-idea") == 0)
 131                         enc=EVP_idea_cbc();
 132 #endif
 133                 else
 134                         break;
 135                 argv++;
 136                 argc--;
 137                 }
 138         if ((argc >= 1) && ((sscanf(*argv,"%d",&num) == 0) || (num < 0)))
 139                 {
 140 bad:
 141                 BIO_printf(bio_err,"usage: genrsa [args] [numbits]\n");
 142                 BIO_printf(bio_err," -des      - encrypt the generated key with DES in cbc mode\n");
 143                 BIO_printf(bio_err," -des3     - encrypt the generated key with DES in ede cbc mode (168 bit key)\n");
 144 #ifndef NO_IDEA
 145                 BIO_printf(bio_err," -idea     - encrypt the generated key with IDEA in cbc mode\n");
 146 #endif
 147                 BIO_printf(bio_err," -out file - output the key to 'file\n");
 148                 BIO_printf(bio_err," -f4       - use F4 (0x10001) for the E value\n");
 149                 BIO_printf(bio_err," -3        - use 3 for the E value\n");
 150                 BIO_printf(bio_err," -rand file:file:...\n");
 151                 BIO_printf(bio_err,"           - load the file (or the files in the directory) into\n");
 152                 BIO_printf(bio_err,"             the random number generator\n");
 153                 goto err;
 154                 }
 155
 156         ERR_load_crypto_strings();
 157         if (outfile == NULL)
 158                 BIO_set_fp(out,stdout,BIO_NOCLOSE);
 159         else
 160                 {
 161                 if (BIO_write_filename(out,outfile) <= 0)
 162                         {
 163                         perror(outfile);
 164                         goto err;
 165                         }
 166                 }
 167
 168 #ifdef WINDOWS
 169         BIO_printf(bio_err,"Loading 'screen' into random state -");
 170         BIO_flush(bio_err);
 171         RAND_screen();
 172         BIO_printf(bio_err," done\n");
 173 #endif
 174         randfile=RAND_file_name(buffer,200);
 175         if ((randfile == NULL) ||
 176                  !(rnum=(long)RAND_load_file(randfile,1024L*1024L)))
 177                 {
 178                 BIO_printf(bio_err,"unable to load 'random state'\n");
 179                 }
 180
 181         if (inrand == NULL)
 182                 {
 183                 if (rnum == 0)
 184                         {
 185                         BIO_printf(bio_err,"warning, not much extra random data, consider using the -rand option\n");
 186                         }
 187                 }
 188         else
 189                 {
 190                 rnum+=gr_load_rand(inrand);
 191                 }
 192         if (rnum != 0)
 193                 BIO_printf(bio_err,"%ld semi-random bytes loaded\n",rnum);
 194
 195         BIO_printf(bio_err,"Generating RSA private key, %d bit long modulus\n",
 196                 num);
 197         rsa=RSA_generate_key(num,f4,genrsa_cb,bio_err);
 198
 199         if (randfile == NULL)
 200                 BIO_printf(bio_err,"unable to write 'random state'\n");
 201         else
 202                 RAND_write_file(randfile);
 203
 204         if (rsa == NULL) goto err;
 205
 206         /* We need to do the folloing for when the base number size is <
 207          * long, esp windows 3.1 :-(. */
 208         l=0L;
 209         for (i=0; i<rsa->e->top; i++)
 210                 {
 211 #ifndef SIXTY_FOUR_BIT
 212                 l<<=BN_BITS4;
 213                 l<<=BN_BITS4;
 214 #endif
 215                 l+=rsa->e->d[i];
 216                 }
 217         BIO_printf(bio_err,"e is %ld (0x%lX)\n",l,l);
 218         if (!PEM_write_bio_RSAPrivateKey(out,rsa,enc,NULL,0,NULL))
 219                 goto err;
 220
 221         ret=0;
 222 err:
 223         if (rsa != NULL) RSA_free(rsa);
 224         if (out != NULL) BIO_free(out);
 225         if (ret != 0)
 226                 ERR_print_errors(bio_err);
 227         EXIT(ret);
 228         }
 229
 230 static void MS_CALLBACK genrsa_cb(int p, int n, void *arg)
 231         {
 232         char c='*';
 233
 234         if (p == 0) c='.';
 235         if (p == 1) c='+';
 236         if (p == 2) c='*';
 237         if (p == 3) c='\n';
 238         BIO_write((BIO *)arg,&c,1);
 239         (void)BIO_flush((BIO *)arg);
 240 #ifdef LINT
 241         p=n;
 242 #endif
 243         }
 244
 245 static long gr_load_rand(char *name)
 246         {
 247         char *p,*n;
 248         int last;
 249         long tot=0;
 250
 251         for (;;)
 252                 {
 253                 last=0;
 254                 for (p=name; ((*p != '\0') && (*p != LIST_SEPARATOR_CHAR)); p++);
 255                 if (*p == '\0') last=1;
 256                 *p='\0';
 257                 n=name;
 258                 name=p+1;
 259                 if (*n == '\0') break;
 260
 261                 tot+=RAND_load_file(n,1024L*1024L);
 262                 if (last) break;
 263                 }
 264         return(tot);
 265         }
 266 #endif