apps/dsaparam.c

   1 /* apps/dsaparam.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 #include <stdio.h>
  60 #include <stdlib.h>
  61 #include <time.h>
  62 #include <string.h>
  63 #include "apps.h"
  64 #include "bio.h"
  65 #include "err.h"
  66 #include "bn.h"
  67 #include "rand.h"
  68 #include "dsa.h"
  69 #include "x509.h"
  70 #include "pem.h"
  71
  72 #undef PROG
  73 #define PROG    dsaparam_main
  74
  75 /* -inform arg  - input format - default PEM (one of DER, TXT or PEM)
  76  * -outform arg - output format - default PEM
  77  * -in arg      - input file - default stdin
  78  * -out arg     - output file - default stdout
  79  * -noout
  80  * -text
  81  * -C
  82  * -noout
  83  */
  84
  85 #ifndef NOPROTO
  86 static void MS_CALLBACK dsa_cb(int p, int n, char *arg);
  87 #else
  88 static void MS_CALLBACK dsa_cb();
  89 #endif
  90
  91 int MAIN(argc, argv)
  92 int argc;
  93 char **argv;
  94         {
  95         DSA *dsa=NULL;
  96         int i,badops=0,text=0;
  97         BIO *in=NULL,*out=NULL;
  98         int informat,outformat,noout=0,C=0,ret=1;
  99         char *infile,*outfile,*prog,*inrand=NULL;
 100         int numbits= -1,num;
 101         char buffer[200],*randfile=NULL;
 102
 103         apps_startup();
 104
 105         if (bio_err == NULL)
 106                 if ((bio_err=BIO_new(BIO_s_file())) != NULL)
 107                         BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT);
 108
 109         infile=NULL;
 110         outfile=NULL;
 111         informat=FORMAT_PEM;
 112         outformat=FORMAT_PEM;
 113
 114         prog=argv[0];
 115         argc--;
 116         argv++;
 117         while (argc >= 1)
 118                 {
 119                 if      (strcmp(*argv,"-inform") == 0)
 120                         {
 121                         if (--argc < 1) goto bad;
 122                         informat=str2fmt(*(++argv));
 123                         }
 124                 else if (strcmp(*argv,"-outform") == 0)
 125                         {
 126                         if (--argc < 1) goto bad;
 127                         outformat=str2fmt(*(++argv));
 128                         }
 129                 else if (strcmp(*argv,"-in") == 0)
 130                         {
 131                         if (--argc < 1) goto bad;
 132                         infile= *(++argv);
 133                         }
 134                 else if (strcmp(*argv,"-out") == 0)
 135                         {
 136                         if (--argc < 1) goto bad;
 137                         outfile= *(++argv);
 138                         }
 139                 else if (strcmp(*argv,"-text") == 0)
 140                         text=1;
 141                 else if (strcmp(*argv,"-C") == 0)
 142                         C=1;
 143                 else if (strcmp(*argv,"-rand") == 0)
 144                         {
 145                         if (--argc < 1) goto bad;
 146                         inrand= *(++argv);
 147                         }
 148                 else if (strcmp(*argv,"-noout") == 0)
 149                         noout=1;
 150                 else if (sscanf(*argv,"%d",&num) == 1)
 151                         {
 152                         /* generate a key */
 153                         numbits=num;
 154                         }
 155                 else
 156                         {
 157                         BIO_printf(bio_err,"unknown option %s\n",*argv);
 158                         badops=1;
 159                         break;
 160                         }
 161                 argc--;
 162                 argv++;
 163                 }
 164
 165         if (badops)
 166                 {
 167 bad:
 168                 BIO_printf(bio_err,"%s [options] [bits] <infile >outfile\n",prog);
 169                 BIO_printf(bio_err,"where options are\n");
 170                 BIO_printf(bio_err," -inform arg   input format - one of DER TXT PEM\n");
 171                 BIO_printf(bio_err," -outform arg  output format - one of DER TXT PEM\n");
 172                 BIO_printf(bio_err," -in arg       inout file\n");
 173                 BIO_printf(bio_err," -out arg      output file\n");
 174                 BIO_printf(bio_err," -text         check the DSA parameters\n");
 175                 BIO_printf(bio_err," -C            Output C code\n");
 176                 BIO_printf(bio_err," -noout        no output\n");
 177                 BIO_printf(bio_err," -rand         files to use for random number input\n");
 178                 BIO_printf(bio_err," number        number of bits to use for generating private key\n");
 179                 goto end;
 180                 }
 181
 182         ERR_load_crypto_strings();
 183
 184         in=BIO_new(BIO_s_file());
 185         out=BIO_new(BIO_s_file());
 186         if ((in == NULL) || (out == NULL))
 187                 {
 188                 ERR_print_errors(bio_err);
 189                 goto end;
 190                 }
 191
 192         if (infile == NULL)
 193                 BIO_set_fp(in,stdin,BIO_NOCLOSE);
 194         else
 195                 {
 196                 if (BIO_read_filename(in,infile) <= 0)
 197                         {
 198                         perror(infile);
 199                         goto end;
 200                         }
 201                 }
 202         if (outfile == NULL)
 203                 BIO_set_fp(out,stdout,BIO_NOCLOSE);
 204         else
 205                 {
 206                 if (BIO_write_filename(out,outfile) <= 0)
 207                         {
 208                         perror(outfile);
 209                         goto end;
 210                         }
 211                 }
 212
 213         if (numbits > 0)
 214                 {
 215                 randfile=RAND_file_name(buffer,200);
 216                 RAND_load_file(randfile,1024L*1024L);
 217
 218                 BIO_printf(bio_err,"Generating DSA parameters, %d bit long prime\n",num);
 219                 BIO_printf(bio_err,"This could take some time\n");
 220                 dsa=DSA_generate_parameters(num,NULL,0,NULL,NULL,
 221                         dsa_cb,(char *)bio_err);
 222                 }
 223         else if (informat == FORMAT_ASN1)
 224                 dsa=d2i_DSAparams_bio(in,NULL);
 225         else if (informat == FORMAT_PEM)
 226                 dsa=PEM_read_bio_DSAparams(in,NULL,NULL);
 227         else
 228                 {
 229                 BIO_printf(bio_err,"bad input format specified\n");
 230                 goto end;
 231                 }
 232         if (dsa == NULL)
 233                 {
 234                 BIO_printf(bio_err,"unable to load DSA parameters\n");
 235                 ERR_print_errors(bio_err);
 236                 goto end;
 237                 }
 238
 239         if (text)
 240                 {
 241                 DSAparams_print(out,dsa);
 242                 }
 243
 244         if (C)
 245                 {
 246                 unsigned char *data;
 247                 int l,len,bits_p,bits_q,bits_g;
 248
 249                 len=BN_num_bytes(dsa->p);
 250                 bits_p=BN_num_bits(dsa->p);
 251                 bits_q=BN_num_bits(dsa->q);
 252                 bits_g=BN_num_bits(dsa->g);
 253                 data=(unsigned char *)Malloc(len+20);
 254                 if (data == NULL)
 255                         {
 256                         perror("Malloc");
 257                         goto end;
 258                         }
 259                 l=BN_bn2bin(dsa->p,data);
 260                 printf("static unsigned char dsa%d_p[]={",bits_p);
 261                 for (i=0; i<l; i++)
 262                         {
 263                         if ((i%12) == 0) printf("\n\t");
 264                         printf("0x%02X,",data[i]);
 265                         }
 266                 printf("\n\t};\n");
 267
 268                 l=BN_bn2bin(dsa->q,data);
 269                 printf("static unsigned char dsa%d_q[]={",bits_p);
 270                 for (i=0; i<l; i++)
 271                         {
 272                         if ((i%12) == 0) printf("\n\t");
 273                         printf("0x%02X,",data[i]);
 274                         }
 275                 printf("\n\t};\n");
 276
 277                 l=BN_bn2bin(dsa->g,data);
 278                 printf("static unsigned char dsa%d_g[]={",bits_p);
 279                 for (i=0; i<l; i++)
 280                         {
 281                         if ((i%12) == 0) printf("\n\t");
 282                         printf("0x%02X,",data[i]);
 283                         }
 284                 printf("\n\t};\n\n");
 285
 286                 printf("DSA *get_dsa%d()\n\t{\n",bits_p);
 287                 printf("\tDSA *dsa;\n\n");
 288                 printf("\tif ((dsa=DSA_new()) == NULL) return(NULL);\n");
 289                 printf("\tdsa->p=BN_bin2bn(dsa%d_p,sizeof(dsa%d_p),NULL);\n",
 290                         bits_p,bits_p);
 291                 printf("\tdsa->q=BN_bin2bn(dsa%d_q,sizeof(dsa%d_q),NULL);\n",
 292                         bits_p,bits_p);
 293                 printf("\tdsa->g=BN_bin2bn(dsa%d_g,sizeof(dsa%d_g),NULL);\n",
 294                         bits_p,bits_p);
 295                 printf("\tif ((dsa->p == NULL) || (dsa->q == NULL) || (dsa->g == NULL))\n");
 296                 printf("\t\treturn(NULL);\n");
 297                 printf("\treturn(dsa);\n\t}\n");
 298                 }
 299
 300
 301         if (!noout)
 302                 {
 303                 if      (outformat == FORMAT_ASN1)
 304                         i=i2d_DSAparams_bio(out,dsa);
 305                 else if (outformat == FORMAT_PEM)
 306                         i=PEM_write_bio_DSAparams(out,dsa);
 307                 else    {
 308                         BIO_printf(bio_err,"bad output format specified for outfile\n");
 309                         goto end;
 310                         }
 311                 if (!i)
 312                         {
 313                         BIO_printf(bio_err,"unable to write DSA paramaters\n");
 314                         ERR_print_errors(bio_err);
 315                         goto end;
 316                         }
 317                 }
 318         ret=0;
 319 end:
 320         if (in != NULL) BIO_free(in);
 321         if (out != NULL) BIO_free(out);
 322         if (dsa != NULL) DSA_free(dsa);
 323         EXIT(ret);
 324         }
 325
 326 static void MS_CALLBACK dsa_cb(p, n, arg)
 327 int p;
 328 int n;
 329 char *arg;
 330         {
 331         char c='*';
 332
 333         if (p == 0) c='.';
 334         if (p == 1) c='+';
 335         if (p == 2) c='*';
 336         if (p == 3) c='\n';
 337         BIO_write((BIO *)arg,&c,1);
 338         BIO_flush((BIO *)arg);
 339 #ifdef LINT
 340         p=n;
 341 #endif
 342         }