apps/genrsa.c

   1 /* apps/genrsa.c */
   2 /* Copyright (C) 1995-1997 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 #include <stdio.h>
  60 #include <string.h>
  61 #include <sys/types.h>
  62 #include <sys/stat.h>
  63 #include "apps.h"
  64 #include "bio.h"
  65 #include "rand.h"
  66 #include "err.h"
  67 #include "bn.h"
  68 #include "rsa.h"
  69 #include "evp.h"
  70 #include "x509.h"
  71 #include "pem.h"
  72
  73 #define DEFBITS 512
  74 #undef PROG
  75 #define PROG genrsa_main
  76
  77 #ifndef NOPROTO
  78 static void MS_CALLBACK genrsa_cb(int p, int n);
  79 static long gr_load_rand(char *names);
  80 #else
  81 static void MS_CALLBACK genrsa_cb();
  82 static long gr_load_rand();
  83 #endif
  84
  85 int MAIN(argc, argv)
  86 int argc;
  87 char **argv;
  88         {
  89         int ret=1;
  90         char buffer[200];
  91         RSA *rsa=NULL;
  92         int i,num=DEFBITS;
  93         long rnum=0,l;
  94         EVP_CIPHER *enc=NULL;
  95         unsigned long f4=RSA_F4;
  96         char *outfile=NULL;
  97         char *inrand=NULL,*randfile;
  98         BIO *out=NULL;
  99
 100         apps_startup();
 101
 102         if (bio_err == NULL)
 103                 if ((bio_err=BIO_new(BIO_s_file())) != NULL)
 104                         BIO_set_fp(bio_err,stderr,BIO_NOCLOSE);
 105         if ((out=BIO_new(BIO_s_file())) == NULL)
 106                 {
 107                 BIO_printf(bio_err,"unable to creat BIO for output\n");
 108                 goto err;
 109                 }
 110
 111         argv++;
 112         argc--;
 113         for (;;)
 114                 {
 115                 if (argc <= 0) break;
 116                 if (strcmp(*argv,"-out") == 0)
 117                         {
 118                         if (--argc < 1) goto bad;
 119                         outfile= *(++argv);
 120                         }
 121                 else if (strcmp(*argv,"-3") == 0)
 122                         f4=3;
 123                 else if (strcmp(*argv,"-F4") == 0)
 124                         f4=RSA_F4;
 125                 else if (strcmp(*argv,"-rand") == 0)
 126                         {
 127                         if (--argc < 1) goto bad;
 128                         inrand= *(++argv);
 129                         }
 130 #ifndef NO_DES
 131                 else if (strcmp(*argv,"-des") == 0)
 132                         enc=EVP_des_cbc();
 133                 else if (strcmp(*argv,"-des3") == 0)
 134                         enc=EVP_des_ede3_cbc();
 135 #endif
 136 #ifndef NO_IDEA
 137                 else if (strcmp(*argv,"-idea") == 0)
 138                         enc=EVP_idea_cbc();
 139 #endif
 140                 else
 141                         break;
 142                 argv++;
 143                 argc--;
 144                 }
 145         if ((argc >= 1) && ((sscanf(*argv,"%d",&num) == 0) || (num < 0)))
 146                 {
 147 bad:
 148                 BIO_printf(bio_err,"usage: genrsa [args] [numbits]\n");
 149                 BIO_printf(bio_err," -des      - encrypt the generated key with DES in cbc mode\n");
 150                 BIO_printf(bio_err," -des3     - encrypt the generated key with DES in ede cbc mode (168 bit key)\n");
 151 #ifndef NO_IDEA
 152                 BIO_printf(bio_err," -idea     - encrypt the generated key with IDEA in cbc mode\n");
 153 #endif
 154                 BIO_printf(bio_err," -out file - output the key to 'file\n");
 155                 BIO_printf(bio_err," -f4       - use F4 (0x10001) for the E value\n");
 156                 BIO_printf(bio_err," -3        - use 3 for the E value\n");
 157                 BIO_printf(bio_err," -rand file:file:...\n");
 158                 BIO_printf(bio_err,"           - load the file (or the files in the directory) into\n");
 159                 BIO_printf(bio_err,"             the random number generator\n");
 160                 goto err;
 161                 }
 162
 163         ERR_load_crypto_strings();
 164         if (outfile == NULL)
 165                 BIO_set_fp(out,stdout,BIO_NOCLOSE);
 166         else
 167                 {
 168                 if (BIO_write_filename(out,outfile) <= 0)
 169                         {
 170                         perror(outfile);
 171                         goto err;
 172                         }
 173                 }
 174
 175 #ifdef WINDOWS
 176         BIO_printf(bio_err,"Loading 'screen' into random state -");
 177         BIO_flush(bio_err);
 178         RAND_screen();
 179         BIO_printf(bio_err," done\n");
 180 #endif
 181         randfile=RAND_file_name(buffer,200);
 182         if ((randfile == NULL) ||
 183                  !(rnum=(long)RAND_load_file(randfile,1024L*1024L)))
 184                 {
 185                 BIO_printf(bio_err,"unable to load 'random state'\n");
 186                 }
 187
 188         if (inrand == NULL)
 189                 {
 190                 if (rnum == 0)
 191                         {
 192                         BIO_printf(bio_err,"warning, not much extra random data, consider using the -rand option\n");
 193                         }
 194                 }
 195         else
 196                 {
 197                 rnum+=gr_load_rand(inrand);
 198                 }
 199         if (rnum != 0)
 200                 BIO_printf(bio_err,"%ld semi-random bytes loaded\n",rnum);
 201
 202         BIO_printf(bio_err,"Generating RSA private key, %d bit long modulus\n",
 203                 num);
 204         rsa=RSA_generate_key(num,f4,genrsa_cb);
 205
 206         if (randfile == NULL)
 207                 BIO_printf(bio_err,"unable to write 'random state'\n");
 208         else
 209                 RAND_write_file(randfile);
 210
 211         if (rsa == NULL) goto err;
 212
 213         /* We need to do the folloing for when the base number size is <
 214          * long, esp windows 3.1 :-(. */
 215         l=0L;
 216         for (i=0; i<rsa->e->top; i++)
 217                 {
 218 #ifndef SIXTY_FOUR_BIT
 219                 l<<=BN_BITS4;
 220                 l<<=BN_BITS4;
 221 #endif
 222                 l+=rsa->e->d[i];
 223                 }
 224         BIO_printf(bio_err,"e is %ld (0x%lX)\n",l,l);
 225         if (!PEM_write_bio_RSAPrivateKey(out,rsa,enc,NULL,0,NULL))
 226                 goto err;
 227
 228         ret=0;
 229 err:
 230         if (rsa != NULL) RSA_free(rsa);
 231         if (out != NULL) BIO_free(out);
 232         if (ret != 0)
 233                 ERR_print_errors(bio_err);
 234         EXIT(ret);
 235         }
 236
 237 static void MS_CALLBACK genrsa_cb(p, n)
 238 int p;
 239 int n;
 240         {
 241         char c='*';
 242
 243         if (p == 0) c='.';
 244         if (p == 1) c='+';
 245         if (p == 2) c='*';
 246         if (p == 3) c='\n';
 247         BIO_write(bio_err,&c,1);
 248         BIO_flush(bio_err);
 249 #ifdef LINT
 250         p=n;
 251 #endif
 252         }
 253
 254 static long gr_load_rand(name)
 255 char *name;
 256         {
 257         char *p,*n;
 258         int last;
 259         long tot=0;
 260
 261         for (;;)
 262                 {
 263                 last=0;
 264                 for (p=name; ((*p != '\0') && (*p != LIST_SEPARATOR_CHAR)); p++);
 265                 if (*p == '\0') last=1;
 266                 *p='\0';
 267                 n=name;
 268                 name=p+1;
 269                 if (*n == '\0') break;
 270
 271                 tot+=RAND_load_file(n,1024L*1024L);
 272                 if (last) break;
 273                 }
 274         return(tot);
 275         }
 276
 277