apps/gendsa.c

   1 /* apps/gendsa.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 "dsa.h"
  69 #include "x509.h"
  70 #include "pem.h"
  71
  72 #define DEFBITS 512
  73 #undef PROG
  74 #define PROG gendsa_main
  75
  76 #ifndef NOPROTO
  77 static long dsa_load_rand(char *names);
  78 #else
  79 static long dsa_load_rand();
  80 #endif
  81
  82 int MAIN(argc, argv)
  83 int argc;
  84 char **argv;
  85         {
  86         char buffer[200];
  87         DSA *dsa=NULL;
  88         int ret=1,num=DEFBITS;
  89         char *outfile=NULL;
  90         char *inrand=NULL,*randfile,*dsaparams=NULL;
  91         BIO *out=NULL,*in=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);
  98
  99         argv++;
 100         argc--;
 101         for (;;)
 102                 {
 103                 if (argc <= 0) break;
 104                 if (strcmp(*argv,"-out") == 0)
 105                         {
 106                         if (--argc < 1) goto bad;
 107                         outfile= *(++argv);
 108                         }
 109                 else if (strcmp(*argv,"-rand") == 0)
 110                         {
 111                         if (--argc < 1) goto bad;
 112                         inrand= *(++argv);
 113                         }
 114                 else if (strcmp(*argv,"-") == 0)
 115                         goto bad;
 116                 else if (dsaparams == NULL)
 117                         {
 118                         dsaparams= *argv;
 119                         }
 120                 else
 121                         goto bad;
 122                 argv++;
 123                 argc--;
 124                 }
 125
 126         if (dsaparams == NULL)
 127                 {
 128 bad:
 129                 BIO_printf(bio_err,"usage: gendsa [args] [numbits]\n");
 130                 BIO_printf(bio_err," -out file - output the key to 'file\n");
 131                 BIO_printf(bio_err," -rand file:file:...\n");
 132                 BIO_printf(bio_err,"           - load the file (or the files in the directory) into\n");
 133                 BIO_printf(bio_err,"             the random number generator\n");
 134                 goto end;
 135                 }
 136
 137         in=BIO_new(BIO_s_file());
 138         if (!(BIO_read_filename(in,"r")))
 139                 {
 140                 perror(dsaparams);
 141                 goto end;
 142                 }
 143
 144         if ((dsa=PEM_read_bio_DSAparams(in,NULL,NULL)) == NULL)
 145                 {
 146                 BIO_printf(bio_err,"unable to load DSA parameter file\n");
 147                 goto end;
 148                 }
 149         BIO_free(in);
 150
 151         out=BIO_new(BIO_s_file());
 152         if (out == NULL) goto end;
 153
 154         if (outfile == NULL)
 155                 BIO_set_fp(out,stdout,BIO_NOCLOSE);
 156         else
 157                 {
 158                 if (BIO_write_filename(out,outfile) <= 0)
 159                         {
 160                         perror(outfile);
 161                         goto end;
 162                         }
 163                 }
 164
 165         randfile=RAND_file_name(buffer,200);
 166         if ((randfile == NULL)|| !RAND_load_file(randfile,1024L*1024L))
 167                 BIO_printf(bio_err,"unable to load 'random state'\n");
 168
 169         if (inrand == NULL)
 170                 BIO_printf(bio_err,"warning, not much extra random data, consider using the -rand option\n");
 171         else
 172                 {
 173                 BIO_printf(bio_err,"%ld semi-random bytes loaded\n",
 174                         dsa_load_rand(inrand));
 175                 }
 176
 177         BIO_printf(bio_err,"Generating DSA parameters, %d bit long prime\n",num);
 178         BIO_printf(bio_err,"This could take some time\n");
 179         if (!DSA_generate_key(dsa)) goto end;
 180
 181         if (randfile == NULL)
 182                 BIO_printf(bio_err,"unable to write 'random state'\n");
 183         else
 184                 RAND_write_file(randfile);
 185
 186         if (!PEM_write_bio_DSAPrivateKey(out,dsa,EVP_des_ede3_cbc(),NULL,0,NULL))
 187                 goto end;
 188         ret=0;
 189 end:
 190         if (ret != 0)
 191                 ERR_print_errors(bio_err);
 192         if (out != NULL) BIO_free(out);
 193         if (dsa != NULL) DSA_free(dsa);
 194         EXIT(ret);
 195         }
 196
 197 static long dsa_load_rand(name)
 198 char *name;
 199         {
 200         char *p,*n;
 201         int last;
 202         long tot=0;
 203
 204         for (;;)
 205                 {
 206                 last=0;
 207                 for (p=name; ((*p != '\0') && (*p != LIST_SEPARATOR_CHAR)); p++);
 208                 if (*p == '\0') last=1;
 209                 *p='\0';
 210                 n=name;
 211                 name=p+1;
 212                 if (*n == '\0') break;
 213
 214                 tot+=RAND_load_file(n,1);
 215                 if (last) break;
 216                 }
 217         return(tot);
 218         }
 219
 220