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 #include <openssl/engine.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         ENGINE *e = NULL;
  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,genkey=0;
 101         int need_rand=0;
 102         char *engine=NULL;
 103
 104         apps_startup();
 105
 106         if (bio_err == NULL)
 107                 if ((bio_err=BIO_new(BIO_s_file())) != NULL)
 108                         BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT);
 109
 110         infile=NULL;
 111         outfile=NULL;
 112         informat=FORMAT_PEM;
 113         outformat=FORMAT_PEM;
 114
 115         prog=argv[0];
 116         argc--;
 117         argv++;
 118         while (argc >= 1)
 119                 {
 120                 if      (strcmp(*argv,"-inform") == 0)
 121                         {
 122                         if (--argc < 1) goto bad;
 123                         informat=str2fmt(*(++argv));
 124                         }
 125                 else if (strcmp(*argv,"-outform") == 0)
 126                         {
 127                         if (--argc < 1) goto bad;
 128                         outformat=str2fmt(*(++argv));
 129                         }
 130                 else if (strcmp(*argv,"-in") == 0)
 131                         {
 132                         if (--argc < 1) goto bad;
 133                         infile= *(++argv);
 134                         }
 135                 else if (strcmp(*argv,"-out") == 0)
 136                         {
 137                         if (--argc < 1) goto bad;
 138                         outfile= *(++argv);
 139                         }
 140                 else if(strcmp(*argv, "-engine") == 0)
 141                         {
 142                         if (--argc < 1) goto bad;
 143                         engine = *(++argv);
 144                         }
 145                 else if (strcmp(*argv,"-text") == 0)
 146                         text=1;
 147                 else if (strcmp(*argv,"-C") == 0)
 148                         C=1;
 149                 else if (strcmp(*argv,"-genkey") == 0)
 150                         {
 151                         genkey=1;
 152                         need_rand=1;
 153                         }
 154                 else if (strcmp(*argv,"-rand") == 0)
 155                         {
 156                         if (--argc < 1) goto bad;
 157                         inrand= *(++argv);
 158                         need_rand=1;
 159                         }
 160                 else if (strcmp(*argv,"-noout") == 0)
 161                         noout=1;
 162                 else if (sscanf(*argv,"%d",&num) == 1)
 163                         {
 164                         /* generate a key */
 165                         numbits=num;
 166                         need_rand=1;
 167                         }
 168                 else
 169                         {
 170                         BIO_printf(bio_err,"unknown option %s\n",*argv);
 171                         badops=1;
 172                         break;
 173                         }
 174                 argc--;
 175                 argv++;
 176                 }
 177
 178         if (badops)
 179                 {
 180 bad:
 181                 BIO_printf(bio_err,"%s [options] [bits] <infile >outfile\n",prog);
 182                 BIO_printf(bio_err,"where options are\n");
 183                 BIO_printf(bio_err," -inform arg   input format - DER or PEM\n");
 184                 BIO_printf(bio_err," -outform arg  output format - DER or PEM\n");
 185                 BIO_printf(bio_err," -in arg       input file\n");
 186                 BIO_printf(bio_err," -out arg      output file\n");
 187                 BIO_printf(bio_err," -text         print the key in text\n");
 188                 BIO_printf(bio_err," -C            Output C code\n");
 189                 BIO_printf(bio_err," -noout        no output\n");
 190                 BIO_printf(bio_err," -rand         files to use for random number input\n");
 191                 BIO_printf(bio_err," -engine e     use engine e, possibly a hardware device.\n");
 192                 BIO_printf(bio_err," number        number of bits to use for generating private key\n");
 193                 goto end;
 194                 }
 195
 196         ERR_load_crypto_strings();
 197
 198         in=BIO_new(BIO_s_file());
 199         out=BIO_new(BIO_s_file());
 200         if ((in == NULL) || (out == NULL))
 201                 {
 202                 ERR_print_errors(bio_err);
 203                 goto end;
 204                 }
 205
 206         if (infile == NULL)
 207                 BIO_set_fp(in,stdin,BIO_NOCLOSE);
 208         else
 209                 {
 210                 if (BIO_read_filename(in,infile) <= 0)
 211                         {
 212                         perror(infile);
 213                         goto end;
 214                         }
 215                 }
 216         if (outfile == NULL)
 217                 {
 218                 BIO_set_fp(out,stdout,BIO_NOCLOSE);
 219 #ifdef OPENSSL_SYS_VMS
 220                 {
 221                 BIO *tmpbio = BIO_new(BIO_f_linebuffer());
 222                 out = BIO_push(tmpbio, out);
 223                 }
 224 #endif
 225                 }
 226         else
 227                 {
 228                 if (BIO_write_filename(out,outfile) <= 0)
 229                         {
 230                         perror(outfile);
 231                         goto end;
 232                         }
 233                 }
 234
 235         if (engine != NULL)
 236                 {
 237                 if((e = ENGINE_by_id(engine)) == NULL)
 238                         {
 239                         BIO_printf(bio_err,"invalid engine \"%s\"\n",
 240                                 engine);
 241                         goto end;
 242                         }
 243                 if(!ENGINE_set_default(e, ENGINE_METHOD_ALL))
 244                         {
 245                         BIO_printf(bio_err,"can't use that engine\n");
 246                         goto end;
 247                         }
 248                 BIO_printf(bio_err,"engine \"%s\" set.\n", engine);
 249                 /* Free our "structural" reference. */
 250                 ENGINE_free(e);
 251                 }
 252
 253         if (need_rand)
 254                 {
 255                 app_RAND_load_file(NULL, bio_err, (inrand != NULL));
 256                 if (inrand != NULL)
 257                         BIO_printf(bio_err,"%ld semi-random bytes loaded\n",
 258                                 app_RAND_load_files(inrand));
 259                 }
 260
 261         if (numbits > 0)
 262                 {
 263                 assert(need_rand);
 264                 BIO_printf(bio_err,"Generating DSA parameters, %d bit long prime\n",num);
 265                 BIO_printf(bio_err,"This could take some time\n");
 266                 dsa=DSA_generate_parameters(num,NULL,0,NULL,NULL, dsa_cb,bio_err);
 267                 }
 268         else if (informat == FORMAT_ASN1)
 269                 dsa=d2i_DSAparams_bio(in,NULL);
 270         else if (informat == FORMAT_PEM)
 271                 dsa=PEM_read_bio_DSAparams(in,NULL,NULL,NULL);
 272         else
 273                 {
 274                 BIO_printf(bio_err,"bad input format specified\n");
 275                 goto end;
 276                 }
 277         if (dsa == NULL)
 278                 {
 279                 BIO_printf(bio_err,"unable to load DSA parameters\n");
 280                 ERR_print_errors(bio_err);
 281                 goto end;
 282                 }
 283
 284         if (text)
 285                 {
 286                 DSAparams_print(out,dsa);
 287                 }
 288
 289         if (C)
 290                 {
 291                 unsigned char *data;
 292                 int l,len,bits_p,bits_q,bits_g;
 293
 294                 len=BN_num_bytes(dsa->p);
 295                 bits_p=BN_num_bits(dsa->p);
 296                 bits_q=BN_num_bits(dsa->q);
 297                 bits_g=BN_num_bits(dsa->g);
 298                 data=(unsigned char *)OPENSSL_malloc(len+20);
 299                 if (data == NULL)
 300                         {
 301                         perror("OPENSSL_malloc");
 302                         goto end;
 303                         }
 304                 l=BN_bn2bin(dsa->p,data);
 305                 printf("static unsigned char dsa%d_p[]={",bits_p);
 306                 for (i=0; i<l; i++)
 307                         {
 308                         if ((i%12) == 0) printf("\n\t");
 309                         printf("0x%02X,",data[i]);
 310                         }
 311                 printf("\n\t};\n");
 312
 313                 l=BN_bn2bin(dsa->q,data);
 314                 printf("static unsigned char dsa%d_q[]={",bits_p);
 315                 for (i=0; i<l; i++)
 316                         {
 317                         if ((i%12) == 0) printf("\n\t");
 318                         printf("0x%02X,",data[i]);
 319                         }
 320                 printf("\n\t};\n");
 321
 322                 l=BN_bn2bin(dsa->g,data);
 323                 printf("static unsigned char dsa%d_g[]={",bits_p);
 324                 for (i=0; i<l; i++)
 325                         {
 326                         if ((i%12) == 0) printf("\n\t");
 327                         printf("0x%02X,",data[i]);
 328                         }
 329                 printf("\n\t};\n\n");
 330
 331                 printf("DSA *get_dsa%d()\n\t{\n",bits_p);
 332                 printf("\tDSA *dsa;\n\n");
 333                 printf("\tif ((dsa=DSA_new()) == NULL) return(NULL);\n");
 334                 printf("\tdsa->p=BN_bin2bn(dsa%d_p,sizeof(dsa%d_p),NULL);\n",
 335                         bits_p,bits_p);
 336                 printf("\tdsa->q=BN_bin2bn(dsa%d_q,sizeof(dsa%d_q),NULL);\n",
 337                         bits_p,bits_p);
 338                 printf("\tdsa->g=BN_bin2bn(dsa%d_g,sizeof(dsa%d_g),NULL);\n",
 339                         bits_p,bits_p);
 340                 printf("\tif ((dsa->p == NULL) || (dsa->q == NULL) || (dsa->g == NULL))\n");
 341                 printf("\t\t{ DSA_free(dsa); return(NULL); }\n");
 342                 printf("\treturn(dsa);\n\t}\n");
 343                 }
 344
 345
 346         if (!noout)
 347                 {
 348                 if      (outformat == FORMAT_ASN1)
 349                         i=i2d_DSAparams_bio(out,dsa);
 350                 else if (outformat == FORMAT_PEM)
 351                         i=PEM_write_bio_DSAparams(out,dsa);
 352                 else    {
 353                         BIO_printf(bio_err,"bad output format specified for outfile\n");
 354                         goto end;
 355                         }
 356                 if (!i)
 357                         {
 358                         BIO_printf(bio_err,"unable to write DSA parameters\n");
 359                         ERR_print_errors(bio_err);
 360                         goto end;
 361                         }
 362                 }
 363         if (genkey)
 364                 {
 365                 DSA *dsakey;
 366
 367                 assert(need_rand);
 368                 if ((dsakey=DSAparams_dup(dsa)) == NULL) goto end;
 369                 if (!DSA_generate_key(dsakey)) goto end;
 370                 if      (outformat == FORMAT_ASN1)
 371                         i=i2d_DSAPrivateKey_bio(out,dsakey);
 372                 else if (outformat == FORMAT_PEM)
 373                         i=PEM_write_bio_DSAPrivateKey(out,dsakey,NULL,NULL,0,NULL,NULL);
 374                 else    {
 375                         BIO_printf(bio_err,"bad output format specified for outfile\n");
 376                         goto end;
 377                         }
 378                 DSA_free(dsakey);
 379                 }
 380         if (need_rand)
 381                 app_RAND_write_file(NULL, bio_err);
 382         ret=0;
 383 end:
 384         if (in != NULL) BIO_free(in);
 385         if (out != NULL) BIO_free_all(out);
 386         if (dsa != NULL) DSA_free(dsa);
 387         EXIT(ret);
 388         }
 389
 390 static void MS_CALLBACK dsa_cb(int p, int n, void *arg)
 391         {
 392         char c='*';
 393
 394         if (p == 0) c='.';
 395         if (p == 1) c='+';
 396         if (p == 2) c='*';
 397         if (p == 3) c='\n';
 398         BIO_write(arg,&c,1);
 399         (void)BIO_flush(arg);
 400 #ifdef LINT
 401         p=n;
 402 #endif
 403         }
 404 #endif