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 OPENSSL_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         ENGINE *e = NULL;
  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;
  99         int numbits= -1,num,genkey=0;
 100         int need_rand=0;
 101         char *engine=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, "-engine") == 0)
 140                         {
 141                         if (--argc < 1) goto bad;
 142                         engine = *(++argv);
 143                         }
 144                 else if (strcmp(*argv,"-text") == 0)
 145                         text=1;
 146                 else if (strcmp(*argv,"-C") == 0)
 147                         C=1;
 148                 else if (strcmp(*argv,"-genkey") == 0)
 149                         {
 150                         genkey=1;
 151                         need_rand=1;
 152                         }
 153                 else if (strcmp(*argv,"-rand") == 0)
 154                         {
 155                         if (--argc < 1) goto bad;
 156                         inrand= *(++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         files to use for random number input\n");
 190                 BIO_printf(bio_err," -engine e     use engine e, possibly a hardware device.\n");
 191                 BIO_printf(bio_err," number        number of bits to use for generating private key\n");
 192                 goto end;
 193                 }
 194
 195         ERR_load_crypto_strings();
 196
 197         in=BIO_new(BIO_s_file());
 198         out=BIO_new(BIO_s_file());
 199         if ((in == NULL) || (out == NULL))
 200                 {
 201                 ERR_print_errors(bio_err);
 202                 goto end;
 203                 }
 204
 205         if (infile == NULL)
 206                 BIO_set_fp(in,stdin,BIO_NOCLOSE);
 207         else
 208                 {
 209                 if (BIO_read_filename(in,infile) <= 0)
 210                         {
 211                         perror(infile);
 212                         goto end;
 213                         }
 214                 }
 215         if (outfile == NULL)
 216                 {
 217                 BIO_set_fp(out,stdout,BIO_NOCLOSE);
 218 #ifdef OPENSSL_SYS_VMS
 219                 {
 220                 BIO *tmpbio = BIO_new(BIO_f_linebuffer());
 221                 out = BIO_push(tmpbio, out);
 222                 }
 223 #endif
 224                 }
 225         else
 226                 {
 227                 if (BIO_write_filename(out,outfile) <= 0)
 228                         {
 229                         perror(outfile);
 230                         goto end;
 231                         }
 232                 }
 233
 234         e = setup_engine(bio_err, engine, 0);
 235
 236         if (need_rand)
 237                 {
 238                 app_RAND_load_file(NULL, bio_err, (inrand != NULL));
 239                 if (inrand != NULL)
 240                         BIO_printf(bio_err,"%ld semi-random bytes loaded\n",
 241                                 app_RAND_load_files(inrand));
 242                 }
 243
 244         if (numbits > 0)
 245                 {
 246                 assert(need_rand);
 247                 BIO_printf(bio_err,"Generating DSA parameters, %d bit long prime\n",num);
 248                 BIO_printf(bio_err,"This could take some time\n");
 249                 dsa=DSA_generate_parameters(num,NULL,0,NULL,NULL, dsa_cb,bio_err);
 250                 }
 251         else if (informat == FORMAT_ASN1)
 252                 dsa=d2i_DSAparams_bio(in,NULL);
 253         else if (informat == FORMAT_PEM)
 254                 dsa=PEM_read_bio_DSAparams(in,NULL,NULL,NULL);
 255         else
 256                 {
 257                 BIO_printf(bio_err,"bad input format specified\n");
 258                 goto end;
 259                 }
 260         if (dsa == NULL)
 261                 {
 262                 BIO_printf(bio_err,"unable to load DSA parameters\n");
 263                 ERR_print_errors(bio_err);
 264                 goto end;
 265                 }
 266
 267         if (text)
 268                 {
 269                 DSAparams_print(out,dsa);
 270                 }
 271
 272         if (C)
 273                 {
 274                 unsigned char *data;
 275                 int l,len,bits_p,bits_q,bits_g;
 276
 277                 len=BN_num_bytes(dsa->p);
 278                 bits_p=BN_num_bits(dsa->p);
 279                 bits_q=BN_num_bits(dsa->q);
 280                 bits_g=BN_num_bits(dsa->g);
 281                 data=(unsigned char *)OPENSSL_malloc(len+20);
 282                 if (data == NULL)
 283                         {
 284                         perror("OPENSSL_malloc");
 285                         goto end;
 286                         }
 287                 l=BN_bn2bin(dsa->p,data);
 288                 printf("static unsigned char dsa%d_p[]={",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");
 295
 296                 l=BN_bn2bin(dsa->q,data);
 297                 printf("static unsigned char dsa%d_q[]={",bits_p);
 298                 for (i=0; i<l; i++)
 299                         {
 300                         if ((i%12) == 0) printf("\n\t");
 301                         printf("0x%02X,",data[i]);
 302                         }
 303                 printf("\n\t};\n");
 304
 305                 l=BN_bn2bin(dsa->g,data);
 306                 printf("static unsigned char dsa%d_g[]={",bits_p);
 307                 for (i=0; i<l; i++)
 308                         {
 309                         if ((i%12) == 0) printf("\n\t");
 310                         printf("0x%02X,",data[i]);
 311                         }
 312                 printf("\n\t};\n\n");
 313
 314                 printf("DSA *get_dsa%d()\n\t{\n",bits_p);
 315                 printf("\tDSA *dsa;\n\n");
 316                 printf("\tif ((dsa=DSA_new()) == NULL) return(NULL);\n");
 317                 printf("\tdsa->p=BN_bin2bn(dsa%d_p,sizeof(dsa%d_p),NULL);\n",
 318                         bits_p,bits_p);
 319                 printf("\tdsa->q=BN_bin2bn(dsa%d_q,sizeof(dsa%d_q),NULL);\n",
 320                         bits_p,bits_p);
 321                 printf("\tdsa->g=BN_bin2bn(dsa%d_g,sizeof(dsa%d_g),NULL);\n",
 322                         bits_p,bits_p);
 323                 printf("\tif ((dsa->p == NULL) || (dsa->q == NULL) || (dsa->g == NULL))\n");
 324                 printf("\t\t{ DSA_free(dsa); return(NULL); }\n");
 325                 printf("\treturn(dsa);\n\t}\n");
 326                 }
 327
 328
 329         if (!noout)
 330                 {
 331                 if      (outformat == FORMAT_ASN1)
 332                         i=i2d_DSAparams_bio(out,dsa);
 333                 else if (outformat == FORMAT_PEM)
 334                         i=PEM_write_bio_DSAparams(out,dsa);
 335                 else    {
 336                         BIO_printf(bio_err,"bad output format specified for outfile\n");
 337                         goto end;
 338                         }
 339                 if (!i)
 340                         {
 341                         BIO_printf(bio_err,"unable to write DSA parameters\n");
 342                         ERR_print_errors(bio_err);
 343                         goto end;
 344                         }
 345                 }
 346         if (genkey)
 347                 {
 348                 DSA *dsakey;
 349
 350                 assert(need_rand);
 351                 if ((dsakey=DSAparams_dup(dsa)) == NULL) goto end;
 352                 if (!DSA_generate_key(dsakey)) goto end;
 353                 if      (outformat == FORMAT_ASN1)
 354                         i=i2d_DSAPrivateKey_bio(out,dsakey);
 355                 else if (outformat == FORMAT_PEM)
 356                         i=PEM_write_bio_DSAPrivateKey(out,dsakey,NULL,NULL,0,NULL,NULL);
 357                 else    {
 358                         BIO_printf(bio_err,"bad output format specified for outfile\n");
 359                         goto end;
 360                         }
 361                 DSA_free(dsakey);
 362                 }
 363         if (need_rand)
 364                 app_RAND_write_file(NULL, bio_err);
 365         ret=0;
 366 end:
 367         if (in != NULL) BIO_free(in);
 368         if (out != NULL) BIO_free_all(out);
 369         if (dsa != NULL) DSA_free(dsa);
 370         apps_shutdown();
 371         EXIT(ret);
 372         }
 373
 374 static void MS_CALLBACK dsa_cb(int p, int n, void *arg)
 375         {
 376         char c='*';
 377
 378         if (p == 0) c='.';
 379         if (p == 1) c='+';
 380         if (p == 2) c='*';
 381         if (p == 3) c='\n';
 382         BIO_write(arg,&c,1);
 383         (void)BIO_flush(arg);
 384 #ifdef LINT
 385         p=n;
 386 #endif
 387         }
 388 #endif