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 <stdio.h>
  61 #include <stdlib.h>
  62 #include <time.h>
  63 #include <string.h>
  64 #include "apps.h"
  65 #include <openssl/bio.h>
  66 #include <openssl/err.h>
  67 #include <openssl/bn.h>
  68 #include <openssl/rand.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 (one of DER, TXT 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, char *arg);
  88 int MAIN(int argc, char **argv)
  89         {
  90         DSA *dsa=NULL;
  91         int i,badops=0,text=0;
  92         BIO *in=NULL,*out=NULL;
  93         int informat,outformat,noout=0,C=0,ret=1;
  94         char *infile,*outfile,*prog,*inrand=NULL;
  95         int numbits= -1,num,genkey=0;
  96         char buffer[200],*randfile=NULL;
  97
  98         apps_startup();
  99
 100         if (bio_err == NULL)
 101                 if ((bio_err=BIO_new(BIO_s_file())) != NULL)
 102                         BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT);
 103
 104         infile=NULL;
 105         outfile=NULL;
 106         informat=FORMAT_PEM;
 107         outformat=FORMAT_PEM;
 108
 109         prog=argv[0];
 110         argc--;
 111         argv++;
 112         while (argc >= 1)
 113                 {
 114                 if      (strcmp(*argv,"-inform") == 0)
 115                         {
 116                         if (--argc < 1) goto bad;
 117                         informat=str2fmt(*(++argv));
 118                         }
 119                 else if (strcmp(*argv,"-outform") == 0)
 120                         {
 121                         if (--argc < 1) goto bad;
 122                         outformat=str2fmt(*(++argv));
 123                         }
 124                 else if (strcmp(*argv,"-in") == 0)
 125                         {
 126                         if (--argc < 1) goto bad;
 127                         infile= *(++argv);
 128                         }
 129                 else if (strcmp(*argv,"-out") == 0)
 130                         {
 131                         if (--argc < 1) goto bad;
 132                         outfile= *(++argv);
 133                         }
 134                 else if (strcmp(*argv,"-text") == 0)
 135                         text=1;
 136                 else if (strcmp(*argv,"-C") == 0)
 137                         C=1;
 138                 else if (strcmp(*argv,"-genkey") == 0)
 139                         genkey=1;
 140                 else if (strcmp(*argv,"-rand") == 0)
 141                         {
 142                         if (--argc < 1) goto bad;
 143                         inrand= *(++argv);
 144                         }
 145                 else if (strcmp(*argv,"-noout") == 0)
 146                         noout=1;
 147                 else if (sscanf(*argv,"%d",&num) == 1)
 148                         {
 149                         /* generate a key */
 150                         numbits=num;
 151                         }
 152                 else
 153                         {
 154                         BIO_printf(bio_err,"unknown option %s\n",*argv);
 155                         badops=1;
 156                         break;
 157                         }
 158                 argc--;
 159                 argv++;
 160                 }
 161
 162         if (badops)
 163                 {
 164 bad:
 165                 BIO_printf(bio_err,"%s [options] [bits] <infile >outfile\n",prog);
 166                 BIO_printf(bio_err,"where options are\n");
 167                 BIO_printf(bio_err," -inform arg   input format - one of DER TXT PEM\n");
 168                 BIO_printf(bio_err," -outform arg  output format - one of DER TXT PEM\n");
 169                 BIO_printf(bio_err," -in arg       input file\n");
 170                 BIO_printf(bio_err," -out arg      output file\n");
 171                 BIO_printf(bio_err," -text         check the DSA parameters\n");
 172                 BIO_printf(bio_err," -C            Output C code\n");
 173                 BIO_printf(bio_err," -noout        no output\n");
 174                 BIO_printf(bio_err," -rand         files to use for random number input\n");
 175                 BIO_printf(bio_err," number        number of bits to use for generating private key\n");
 176                 goto end;
 177                 }
 178
 179         ERR_load_crypto_strings();
 180
 181         in=BIO_new(BIO_s_file());
 182         out=BIO_new(BIO_s_file());
 183         if ((in == NULL) || (out == NULL))
 184                 {
 185                 ERR_print_errors(bio_err);
 186                 goto end;
 187                 }
 188
 189         if (infile == NULL)
 190                 BIO_set_fp(in,stdin,BIO_NOCLOSE);
 191         else
 192                 {
 193                 if (BIO_read_filename(in,infile) <= 0)
 194                         {
 195                         perror(infile);
 196                         goto end;
 197                         }
 198                 }
 199         if (outfile == NULL)
 200                 BIO_set_fp(out,stdout,BIO_NOCLOSE);
 201         else
 202                 {
 203                 if (BIO_write_filename(out,outfile) <= 0)
 204                         {
 205                         perror(outfile);
 206                         goto end;
 207                         }
 208                 }
 209
 210         if (numbits > 0)
 211                 {
 212                 randfile=RAND_file_name(buffer,200);
 213                 RAND_load_file(randfile,1024L*1024L);
 214
 215                 BIO_printf(bio_err,"Generating DSA parameters, %d bit long prime\n",num);
 216                 BIO_printf(bio_err,"This could take some time\n");
 217                 dsa=DSA_generate_parameters(num,NULL,0,NULL,NULL,
 218                         dsa_cb,(char *)bio_err);
 219                 }
 220         else if (informat == FORMAT_ASN1)
 221                 dsa=d2i_DSAparams_bio(in,NULL);
 222         else if (informat == FORMAT_PEM)
 223                 dsa=PEM_read_bio_DSAparams(in,NULL,NULL);
 224         else
 225                 {
 226                 BIO_printf(bio_err,"bad input format specified\n");
 227                 goto end;
 228                 }
 229         if (dsa == NULL)
 230                 {
 231                 BIO_printf(bio_err,"unable to load DSA parameters\n");
 232                 ERR_print_errors(bio_err);
 233                 goto end;
 234                 }
 235
 236         if (text)
 237                 {
 238                 DSAparams_print(out,dsa);
 239                 }
 240
 241         if (C)
 242                 {
 243                 unsigned char *data;
 244                 int l,len,bits_p,bits_q,bits_g;
 245
 246                 len=BN_num_bytes(dsa->p);
 247                 bits_p=BN_num_bits(dsa->p);
 248                 bits_q=BN_num_bits(dsa->q);
 249                 bits_g=BN_num_bits(dsa->g);
 250                 data=(unsigned char *)Malloc(len+20);
 251                 if (data == NULL)
 252                         {
 253                         perror("Malloc");
 254                         goto end;
 255                         }
 256                 l=BN_bn2bin(dsa->p,data);
 257                 printf("static unsigned char dsa%d_p[]={",bits_p);
 258                 for (i=0; i<l; i++)
 259                         {
 260                         if ((i%12) == 0) printf("\n\t");
 261                         printf("0x%02X,",data[i]);
 262                         }
 263                 printf("\n\t};\n");
 264
 265                 l=BN_bn2bin(dsa->q,data);
 266                 printf("static unsigned char dsa%d_q[]={",bits_p);
 267                 for (i=0; i<l; i++)
 268                         {
 269                         if ((i%12) == 0) printf("\n\t");
 270                         printf("0x%02X,",data[i]);
 271                         }
 272                 printf("\n\t};\n");
 273
 274                 l=BN_bn2bin(dsa->g,data);
 275                 printf("static unsigned char dsa%d_g[]={",bits_p);
 276                 for (i=0; i<l; i++)
 277                         {
 278                         if ((i%12) == 0) printf("\n\t");
 279                         printf("0x%02X,",data[i]);
 280                         }
 281                 printf("\n\t};\n\n");
 282
 283                 printf("DSA *get_dsa%d()\n\t{\n",bits_p);
 284                 printf("\tDSA *dsa;\n\n");
 285                 printf("\tif ((dsa=DSA_new()) == NULL) return(NULL);\n");
 286                 printf("\tdsa->p=BN_bin2bn(dsa%d_p,sizeof(dsa%d_p),NULL);\n",
 287                         bits_p,bits_p);
 288                 printf("\tdsa->q=BN_bin2bn(dsa%d_q,sizeof(dsa%d_q),NULL);\n",
 289                         bits_p,bits_p);
 290                 printf("\tdsa->g=BN_bin2bn(dsa%d_g,sizeof(dsa%d_g),NULL);\n",
 291                         bits_p,bits_p);
 292                 printf("\tif ((dsa->p == NULL) || (dsa->q == NULL) || (dsa->g == NULL))\n");
 293                 printf("\t\treturn(NULL);\n");
 294                 printf("\treturn(dsa);\n\t}\n");
 295                 }
 296
 297
 298         if (!noout)
 299                 {
 300                 if      (outformat == FORMAT_ASN1)
 301                         i=i2d_DSAparams_bio(out,dsa);
 302                 else if (outformat == FORMAT_PEM)
 303                         i=PEM_write_bio_DSAparams(out,dsa);
 304                 else    {
 305                         BIO_printf(bio_err,"bad output format specified for outfile\n");
 306                         goto end;
 307                         }
 308                 if (!i)
 309                         {
 310                         BIO_printf(bio_err,"unable to write DSA paramaters\n");
 311                         ERR_print_errors(bio_err);
 312                         goto end;
 313                         }
 314                 }
 315         if (genkey)
 316                 {
 317                 DSA *dsakey;
 318
 319                 if ((dsakey=DSAparams_dup(dsa)) == NULL) goto end;
 320                 if (!DSA_generate_key(dsakey)) goto end;
 321                 if      (outformat == FORMAT_ASN1)
 322                         i=i2d_DSAPrivateKey_bio(out,dsakey);
 323                 else if (outformat == FORMAT_PEM)
 324                         i=PEM_write_bio_DSAPrivateKey(out,dsakey,NULL,NULL,0,NULL);
 325                 else    {
 326                         BIO_printf(bio_err,"bad output format specified for outfile\n");
 327                         goto end;
 328                         }
 329                 DSA_free(dsakey);
 330                 }
 331         ret=0;
 332 end:
 333         if (in != NULL) BIO_free(in);
 334         if (out != NULL) BIO_free(out);
 335         if (dsa != NULL) DSA_free(dsa);
 336         EXIT(ret);
 337         }
 338
 339 static void MS_CALLBACK dsa_cb(int p, int n, char *arg)
 340         {
 341         char c='*';
 342
 343         if (p == 0) c='.';
 344         if (p == 1) c='+';
 345         if (p == 2) c='*';
 346         if (p == 3) c='\n';
 347         BIO_write((BIO *)arg,&c,1);
 348         (void)BIO_flush((BIO *)arg);
 349 #ifdef LINT
 350         p=n;
 351 #endif
 352         }
 353 #endif