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         if (!load_config(bio_err, NULL))
 110                 goto end;
 111
 112         infile=NULL;
 113         outfile=NULL;
 114         informat=FORMAT_PEM;
 115         outformat=FORMAT_PEM;
 116
 117         prog=argv[0];
 118         argc--;
 119         argv++;
 120         while (argc >= 1)
 121                 {
 122                 if      (strcmp(*argv,"-inform") == 0)
 123                         {
 124                         if (--argc < 1) goto bad;
 125                         informat=str2fmt(*(++argv));
 126                         }
 127                 else if (strcmp(*argv,"-outform") == 0)
 128                         {
 129                         if (--argc < 1) goto bad;
 130                         outformat=str2fmt(*(++argv));
 131                         }
 132                 else if (strcmp(*argv,"-in") == 0)
 133                         {
 134                         if (--argc < 1) goto bad;
 135                         infile= *(++argv);
 136                         }
 137                 else if (strcmp(*argv,"-out") == 0)
 138                         {
 139                         if (--argc < 1) goto bad;
 140                         outfile= *(++argv);
 141                         }
 142                 else if(strcmp(*argv, "-engine") == 0)
 143                         {
 144                         if (--argc < 1) goto bad;
 145                         engine = *(++argv);
 146                         }
 147                 else if (strcmp(*argv,"-text") == 0)
 148                         text=1;
 149                 else if (strcmp(*argv,"-C") == 0)
 150                         C=1;
 151                 else if (strcmp(*argv,"-genkey") == 0)
 152                         {
 153                         genkey=1;
 154                         need_rand=1;
 155                         }
 156                 else if (strcmp(*argv,"-rand") == 0)
 157                         {
 158                         if (--argc < 1) goto bad;
 159                         inrand= *(++argv);
 160                         need_rand=1;
 161                         }
 162                 else if (strcmp(*argv,"-noout") == 0)
 163                         noout=1;
 164                 else if (sscanf(*argv,"%d",&num) == 1)
 165                         {
 166                         /* generate a key */
 167                         numbits=num;
 168                         need_rand=1;
 169                         }
 170                 else
 171                         {
 172                         BIO_printf(bio_err,"unknown option %s\n",*argv);
 173                         badops=1;
 174                         break;
 175                         }
 176                 argc--;
 177                 argv++;
 178                 }
 179
 180         if (badops)
 181                 {
 182 bad:
 183                 BIO_printf(bio_err,"%s [options] [bits] <infile >outfile\n",prog);
 184                 BIO_printf(bio_err,"where options are\n");
 185                 BIO_printf(bio_err," -inform arg   input format - DER or PEM\n");
 186                 BIO_printf(bio_err," -outform arg  output format - DER or PEM\n");
 187                 BIO_printf(bio_err," -in arg       input file\n");
 188                 BIO_printf(bio_err," -out arg      output file\n");
 189                 BIO_printf(bio_err," -text         print as text\n");
 190                 BIO_printf(bio_err," -C            Output C code\n");
 191                 BIO_printf(bio_err," -noout        no output\n");
 192                 BIO_printf(bio_err," -genkey       generate a DSA key\n");
 193                 BIO_printf(bio_err," -rand         files to use for random number input\n");
 194                 BIO_printf(bio_err," -engine e     use engine e, possibly a hardware device.\n");
 195                 BIO_printf(bio_err," number        number of bits to use for generating private key\n");
 196                 goto end;
 197                 }
 198
 199         ERR_load_crypto_strings();
 200
 201         in=BIO_new(BIO_s_file());
 202         out=BIO_new(BIO_s_file());
 203         if ((in == NULL) || (out == NULL))
 204                 {
 205                 ERR_print_errors(bio_err);
 206                 goto end;
 207                 }
 208
 209         if (infile == NULL)
 210                 BIO_set_fp(in,stdin,BIO_NOCLOSE);
 211         else
 212                 {
 213                 if (BIO_read_filename(in,infile) <= 0)
 214                         {
 215                         perror(infile);
 216                         goto end;
 217                         }
 218                 }
 219         if (outfile == NULL)
 220                 {
 221                 BIO_set_fp(out,stdout,BIO_NOCLOSE);
 222 #ifdef OPENSSL_SYS_VMS
 223                 {
 224                 BIO *tmpbio = BIO_new(BIO_f_linebuffer());
 225                 out = BIO_push(tmpbio, out);
 226                 }
 227 #endif
 228                 }
 229         else
 230                 {
 231                 if (BIO_write_filename(out,outfile) <= 0)
 232                         {
 233                         perror(outfile);
 234                         goto end;
 235                         }
 236                 }
 237
 238         e = setup_engine(bio_err, engine, 0);
 239
 240         if (need_rand)
 241                 {
 242                 app_RAND_load_file(NULL, bio_err, (inrand != NULL));
 243                 if (inrand != NULL)
 244                         BIO_printf(bio_err,"%ld semi-random bytes loaded\n",
 245                                 app_RAND_load_files(inrand));
 246                 }
 247
 248         if (numbits > 0)
 249                 {
 250                 assert(need_rand);
 251                 BIO_printf(bio_err,"Generating DSA parameters, %d bit long prime\n",num);
 252                 BIO_printf(bio_err,"This could take some time\n");
 253                 dsa=DSA_generate_parameters(num,NULL,0,NULL,NULL, dsa_cb,bio_err);
 254                 }
 255         else if (informat == FORMAT_ASN1)
 256                 dsa=d2i_DSAparams_bio(in,NULL);
 257         else if (informat == FORMAT_PEM)
 258                 dsa=PEM_read_bio_DSAparams(in,NULL,NULL,NULL);
 259         else
 260                 {
 261                 BIO_printf(bio_err,"bad input format specified\n");
 262                 goto end;
 263                 }
 264         if (dsa == NULL)
 265                 {
 266                 BIO_printf(bio_err,"unable to load DSA parameters\n");
 267                 ERR_print_errors(bio_err);
 268                 goto end;
 269                 }
 270
 271         if (text)
 272                 {
 273                 DSAparams_print(out,dsa);
 274                 }
 275
 276         if (C)
 277                 {
 278                 unsigned char *data;
 279                 int l,len,bits_p,bits_q,bits_g;
 280
 281                 len=BN_num_bytes(dsa->p);
 282                 bits_p=BN_num_bits(dsa->p);
 283                 bits_q=BN_num_bits(dsa->q);
 284                 bits_g=BN_num_bits(dsa->g);
 285                 data=(unsigned char *)OPENSSL_malloc(len+20);
 286                 if (data == NULL)
 287                         {
 288                         perror("OPENSSL_malloc");
 289                         goto end;
 290                         }
 291                 l=BN_bn2bin(dsa->p,data);
 292                 printf("static unsigned char dsa%d_p[]={",bits_p);
 293                 for (i=0; i<l; i++)
 294                         {
 295                         if ((i%12) == 0) printf("\n\t");
 296                         printf("0x%02X,",data[i]);
 297                         }
 298                 printf("\n\t};\n");
 299
 300                 l=BN_bn2bin(dsa->q,data);
 301                 printf("static unsigned char dsa%d_q[]={",bits_p);
 302                 for (i=0; i<l; i++)
 303                         {
 304                         if ((i%12) == 0) printf("\n\t");
 305                         printf("0x%02X,",data[i]);
 306                         }
 307                 printf("\n\t};\n");
 308
 309                 l=BN_bn2bin(dsa->g,data);
 310                 printf("static unsigned char dsa%d_g[]={",bits_p);
 311                 for (i=0; i<l; i++)
 312                         {
 313                         if ((i%12) == 0) printf("\n\t");
 314                         printf("0x%02X,",data[i]);
 315                         }
 316                 printf("\n\t};\n\n");
 317
 318                 printf("DSA *get_dsa%d()\n\t{\n",bits_p);
 319                 printf("\tDSA *dsa;\n\n");
 320                 printf("\tif ((dsa=DSA_new()) == NULL) return(NULL);\n");
 321                 printf("\tdsa->p=BN_bin2bn(dsa%d_p,sizeof(dsa%d_p),NULL);\n",
 322                         bits_p,bits_p);
 323                 printf("\tdsa->q=BN_bin2bn(dsa%d_q,sizeof(dsa%d_q),NULL);\n",
 324                         bits_p,bits_p);
 325                 printf("\tdsa->g=BN_bin2bn(dsa%d_g,sizeof(dsa%d_g),NULL);\n",
 326                         bits_p,bits_p);
 327                 printf("\tif ((dsa->p == NULL) || (dsa->q == NULL) || (dsa->g == NULL))\n");
 328                 printf("\t\t{ DSA_free(dsa); return(NULL); }\n");
 329                 printf("\treturn(dsa);\n\t}\n");
 330                 }
 331
 332
 333         if (!noout)
 334                 {
 335                 if      (outformat == FORMAT_ASN1)
 336                         i=i2d_DSAparams_bio(out,dsa);
 337                 else if (outformat == FORMAT_PEM)
 338                         i=PEM_write_bio_DSAparams(out,dsa);
 339                 else    {
 340                         BIO_printf(bio_err,"bad output format specified for outfile\n");
 341                         goto end;
 342                         }
 343                 if (!i)
 344                         {
 345                         BIO_printf(bio_err,"unable to write DSA parameters\n");
 346                         ERR_print_errors(bio_err);
 347                         goto end;
 348                         }
 349                 }
 350         if (genkey)
 351                 {
 352                 DSA *dsakey;
 353
 354                 assert(need_rand);
 355                 if ((dsakey=DSAparams_dup(dsa)) == NULL) goto end;
 356                 if (!DSA_generate_key(dsakey)) goto end;
 357                 if      (outformat == FORMAT_ASN1)
 358                         i=i2d_DSAPrivateKey_bio(out,dsakey);
 359                 else if (outformat == FORMAT_PEM)
 360                         i=PEM_write_bio_DSAPrivateKey(out,dsakey,NULL,NULL,0,NULL,NULL);
 361                 else    {
 362                         BIO_printf(bio_err,"bad output format specified for outfile\n");
 363                         goto end;
 364                         }
 365                 DSA_free(dsakey);
 366                 }
 367         if (need_rand)
 368                 app_RAND_write_file(NULL, bio_err);
 369         ret=0;
 370 end:
 371         if (in != NULL) BIO_free(in);
 372         if (out != NULL) BIO_free_all(out);
 373         if (dsa != NULL) DSA_free(dsa);
 374         apps_shutdown();
 375         EXIT(ret);
 376         }
 377
 378 static void MS_CALLBACK dsa_cb(int p, int n, void *arg)
 379         {
 380         char c='*';
 381
 382         if (p == 0) c='.';
 383         if (p == 1) c='+';
 384         if (p == 2) c='*';
 385         if (p == 3) c='\n';
 386         BIO_write(arg,&c,1);
 387         (void)BIO_flush(arg);
 388 #ifdef LINT
 389         p=n;
 390 #endif
 391         }
 392 #endif