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