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 #ifndef NO_DSA
  60 #include <assert.h>
  61 #include <stdio.h>
  62 #include <stdlib.h>
  63 #include <time.h>
  64 #include <string.h>
  65 #include "apps.h"
  66 #include <openssl/bio.h>
  67 #include <openssl/err.h>
  68 #include <openssl/bn.h>
  69 #include <openssl/dsa.h>
  70 #include <openssl/x509.h>
  71 #include <openssl/pem.h>
  72 #include <openssl/rand.h>
  73
  74 #undef PROG
  75 #define PROG    dsaparam_main
  76
  77 /* -inform arg  - input format - default PEM (DER or PEM)
  78  * -outform arg - output format - default PEM
  79  * -in arg      - input file - default stdin
  80  * -out arg     - output file - default stdout
  81  * -noout
  82  * -text
  83  * -C
  84  * -noout
  85  * -genkey
  86  */
  87
  88 static void MS_CALLBACK dsa_cb(int p, int n, void *arg);
  89
  90 int MAIN(int, char **);
  91
  92 int MAIN(int argc, char **argv)
  93         {
  94         DSA *dsa=NULL;
  95         int i,badops=0,text=0;
  96         BIO *in=NULL,*out=NULL;
  97         int informat,outformat,noout=0,C=0,ret=1;
  98         char *infile,*outfile,*prog,*inrand=NULL,*inegd=NULL;
  99         int numbits= -1,num,genkey=0;
 100         int need_rand=0;
 101
 102         apps_startup();
 103
 104         if (bio_err == NULL)
 105                 if ((bio_err=BIO_new(BIO_s_file())) != NULL)
 106                         BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT);
 107
 108         infile=NULL;
 109         outfile=NULL;
 110         informat=FORMAT_PEM;
 111         outformat=FORMAT_PEM;
 112
 113         prog=argv[0];
 114         argc--;
 115         argv++;
 116         while (argc >= 1)
 117                 {
 118                 if      (strcmp(*argv,"-inform") == 0)
 119                         {
 120                         if (--argc < 1) goto bad;
 121                         informat=str2fmt(*(++argv));
 122                         }
 123                 else if (strcmp(*argv,"-outform") == 0)
 124                         {
 125                         if (--argc < 1) goto bad;
 126                         outformat=str2fmt(*(++argv));
 127                         }
 128                 else if (strcmp(*argv,"-in") == 0)
 129                         {
 130                         if (--argc < 1) goto bad;
 131                         infile= *(++argv);
 132                         }
 133                 else if (strcmp(*argv,"-out") == 0)
 134                         {
 135                         if (--argc < 1) goto bad;
 136                         outfile= *(++argv);
 137                         }
 138                 else if (strcmp(*argv,"-text") == 0)
 139                         text=1;
 140                 else if (strcmp(*argv,"-C") == 0)
 141                         C=1;
 142                 else if (strcmp(*argv,"-genkey") == 0)
 143                         {
 144                         genkey=1;
 145                         need_rand=1;
 146                         }
 147                 else if (strcmp(*argv,"-rand") == 0)
 148                         {
 149                         if (--argc < 1) goto bad;
 150                         inrand= *(++argv);
 151                         need_rand=1;
 152                         }
 153                 else if (strcmp(*argv,"-egd") == 0)
 154                         {
 155                         if (--argc < 1) goto bad;
 156                         inegd= *(++argv);
 157                         need_rand=1;
 158                         }
 159                 else if (strcmp(*argv,"-noout") == 0)
 160                         noout=1;
 161                 else if (sscanf(*argv,"%d",&num) == 1)
 162                         {
 163                         /* generate a key */
 164                         numbits=num;
 165                         need_rand=1;
 166                         }
 167                 else
 168                         {
 169                         BIO_printf(bio_err,"unknown option %s\n",*argv);
 170                         badops=1;
 171                         break;
 172                         }
 173                 argc--;
 174                 argv++;
 175                 }
 176
 177         if (badops)
 178                 {
 179 bad:
 180                 BIO_printf(bio_err,"%s [options] [bits] <infile >outfile\n",prog);
 181                 BIO_printf(bio_err,"where options are\n");
 182                 BIO_printf(bio_err," -inform arg   input format - DER or PEM\n");
 183                 BIO_printf(bio_err," -outform arg  output format - DER or PEM\n");
 184                 BIO_printf(bio_err," -in arg       input file\n");
 185                 BIO_printf(bio_err," -out arg      output file\n");
 186                 BIO_printf(bio_err," -text         print the key in text\n");
 187                 BIO_printf(bio_err," -C            Output C code\n");
 188                 BIO_printf(bio_err," -noout        no output\n");
 189                 BIO_printf(bio_err," -rand file%cfile%c...\n", LIST_SEPARATOR_CHAR, LIST_SEPARATOR_CHAR);
 190                 BIO_printf(bio_err,"               load the file (or the files in the directory) into\n");
 191                 BIO_printf(bio_err,"               the random number generator\n");
 192                 BIO_printf(bio_err," -egd file     load random seed from EGD socket\n");
 193                 BIO_printf(bio_err," number        number of bits to use for generating private key\n");
 194                 goto end;
 195                 }
 196
 197         ERR_load_crypto_strings();
 198
 199         in=BIO_new(BIO_s_file());
 200         out=BIO_new(BIO_s_file());
 201         if ((in == NULL) || (out == NULL))
 202                 {
 203                 ERR_print_errors(bio_err);
 204                 goto end;
 205                 }
 206
 207         if (infile == NULL)
 208                 BIO_set_fp(in,stdin,BIO_NOCLOSE);
 209         else
 210                 {
 211                 if (BIO_read_filename(in,infile) <= 0)
 212                         {
 213                         perror(infile);
 214                         goto end;
 215                         }
 216                 }
 217         if (outfile == NULL)
 218                 BIO_set_fp(out,stdout,BIO_NOCLOSE);
 219         else
 220                 {
 221                 if (BIO_write_filename(out,outfile) <= 0)
 222                         {
 223                         perror(outfile);
 224                         goto end;
 225                         }
 226                 }
 227
 228         if (need_rand)
 229                 {
 230                 app_RAND_load_file(NULL, bio_err,
 231                         (inrand != NULL || inegd != NULL));
 232                 if (inrand != NULL)
 233                         BIO_printf(bio_err,"%ld semi-random bytes loaded\n",
 234                                 app_RAND_load_files(inrand));
 235                 if (inegd != NULL)
 236                         BIO_printf(bio_err,"%ld egd bytes loaded\n",
 237                                 RAND_egd(inegd));
 238                 }
 239
 240         if (numbits > 0)
 241                 {
 242                 assert(need_rand);
 243                 BIO_printf(bio_err,"Generating DSA parameters, %d bit long prime\n",num);
 244                 BIO_printf(bio_err,"This could take some time\n");
 245                 dsa=DSA_generate_parameters(num,NULL,0,NULL,NULL, dsa_cb,bio_err);
 246                 }
 247         else if (informat == FORMAT_ASN1)
 248                 dsa=d2i_DSAparams_bio(in,NULL);
 249         else if (informat == FORMAT_PEM)
 250                 dsa=PEM_read_bio_DSAparams(in,NULL,NULL,NULL);
 251         else
 252                 {
 253                 BIO_printf(bio_err,"bad input format specified\n");
 254                 goto end;
 255                 }
 256         if (dsa == NULL)
 257                 {
 258                 BIO_printf(bio_err,"unable to load DSA parameters\n");
 259                 ERR_print_errors(bio_err);
 260                 goto end;
 261                 }
 262
 263         if (text)
 264                 {
 265                 DSAparams_print(out,dsa);
 266                 }
 267
 268         if (C)
 269                 {
 270                 unsigned char *data;
 271                 int l,len,bits_p,bits_q,bits_g;
 272
 273                 len=BN_num_bytes(dsa->p);
 274                 bits_p=BN_num_bits(dsa->p);
 275                 bits_q=BN_num_bits(dsa->q);
 276                 bits_g=BN_num_bits(dsa->g);
 277                 data=(unsigned char *)OPENSSL_malloc(len+20);
 278                 if (data == NULL)
 279                         {
 280                         perror("OPENSSL_malloc");
 281                         goto end;
 282                         }
 283                 l=BN_bn2bin(dsa->p,data);
 284                 printf("static unsigned char dsa%d_p[]={",bits_p);
 285                 for (i=0; i<l; i++)
 286                         {
 287                         if ((i%12) == 0) printf("\n\t");
 288                         printf("0x%02X,",data[i]);
 289                         }
 290                 printf("\n\t};\n");
 291
 292                 l=BN_bn2bin(dsa->q,data);
 293                 printf("static unsigned char dsa%d_q[]={",bits_p);
 294                 for (i=0; i<l; i++)
 295                         {
 296                         if ((i%12) == 0) printf("\n\t");
 297                         printf("0x%02X,",data[i]);
 298                         }
 299                 printf("\n\t};\n");
 300
 301                 l=BN_bn2bin(dsa->g,data);
 302                 printf("static unsigned char dsa%d_g[]={",bits_p);
 303                 for (i=0; i<l; i++)
 304                         {
 305                         if ((i%12) == 0) printf("\n\t");
 306                         printf("0x%02X,",data[i]);
 307                         }
 308                 printf("\n\t};\n\n");
 309
 310                 printf("DSA *get_dsa%d()\n\t{\n",bits_p);
 311                 printf("\tDSA *dsa;\n\n");
 312                 printf("\tif ((dsa=DSA_new()) == NULL) return(NULL);\n");
 313                 printf("\tdsa->p=BN_bin2bn(dsa%d_p,sizeof(dsa%d_p),NULL);\n",
 314                         bits_p,bits_p);
 315                 printf("\tdsa->q=BN_bin2bn(dsa%d_q,sizeof(dsa%d_q),NULL);\n",
 316                         bits_p,bits_p);
 317                 printf("\tdsa->g=BN_bin2bn(dsa%d_g,sizeof(dsa%d_g),NULL);\n",
 318                         bits_p,bits_p);
 319                 printf("\tif ((dsa->p == NULL) || (dsa->q == NULL) || (dsa->g == NULL))\n");
 320                 printf("\t\treturn(NULL);\n");
 321                 printf("\treturn(dsa);\n\t}\n");
 322                 }
 323
 324
 325         if (!noout)
 326                 {
 327                 if      (outformat == FORMAT_ASN1)
 328                         i=i2d_DSAparams_bio(out,dsa);
 329                 else if (outformat == FORMAT_PEM)
 330                         i=PEM_write_bio_DSAparams(out,dsa);
 331                 else    {
 332                         BIO_printf(bio_err,"bad output format specified for outfile\n");
 333                         goto end;
 334                         }
 335                 if (!i)
 336                         {
 337                         BIO_printf(bio_err,"unable to write DSA parameters\n");
 338                         ERR_print_errors(bio_err);
 339                         goto end;
 340                         }
 341                 }
 342         if (genkey)
 343                 {
 344                 DSA *dsakey;
 345
 346                 assert(need_rand);
 347                 if ((dsakey=DSAparams_dup(dsa)) == NULL) goto end;
 348                 if (!DSA_generate_key(dsakey)) goto end;
 349                 if      (outformat == FORMAT_ASN1)
 350                         i=i2d_DSAPrivateKey_bio(out,dsakey);
 351                 else if (outformat == FORMAT_PEM)
 352                         i=PEM_write_bio_DSAPrivateKey(out,dsakey,NULL,NULL,0,NULL,NULL);
 353                 else    {
 354                         BIO_printf(bio_err,"bad output format specified for outfile\n");
 355                         goto end;
 356                         }
 357                 DSA_free(dsakey);
 358                 }
 359         if (need_rand)
 360                 app_RAND_write_file(NULL, bio_err);
 361         ret=0;
 362 end:
 363         if (in != NULL) BIO_free(in);
 364         if (out != NULL) BIO_free(out);
 365         if (dsa != NULL) DSA_free(dsa);
 366         EXIT(ret);
 367         }
 368
 369 static void MS_CALLBACK dsa_cb(int p, int n, void *arg)
 370         {
 371         char c='*';
 372
 373         if (p == 0) c='.';
 374         if (p == 1) c='+';
 375         if (p == 2) c='*';
 376         if (p == 3) c='\n';
 377         BIO_write(arg,&c,1);
 378         (void)BIO_flush(arg);
 379 #ifdef LINT
 380         p=n;
 381 #endif
 382         }
 383 #endif