/* apps/gendh.c */ /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) * All rights reserved. * * This package is an SSL implementation written * by Eric Young (eay@cryptsoft.com). * The implementation was written so as to conform with Netscapes SSL. * * This library is free for commercial and non-commercial use as long as * the following conditions are aheared to. The following conditions * apply to all code found in this distribution, be it the RC4, RSA, * lhash, DES, etc., code; not just the SSL code. The SSL documentation * included with this distribution is covered by the same copyright terms * except that the holder is Tim Hudson (tjh@cryptsoft.com). * * Copyright remains Eric Young's, and as such any Copyright notices in * the code are not to be removed. * If this package is used in a product, Eric Young should be given attribution * as the author of the parts of the library used. * This can be in the form of a textual message at program startup or * in documentation (online or textual) provided with the package. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * "This product includes cryptographic software written by * Eric Young (eay@cryptsoft.com)" * The word 'cryptographic' can be left out if the rouines from the library * being used are not cryptographic related :-). * 4. If you include any Windows specific code (or a derivative thereof) from * the apps directory (application code) you must include an acknowledgement: * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" * * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * The licence and distribution terms for any publically available version or * derivative of this code cannot be changed. i.e. this code cannot simply be * copied and put under another distribution licence * [including the GNU Public Licence.] */ #ifndef NO_DH #include #include #include #include #include "apps.h" #include #include #include #include #include #include #include #define DEFBITS 512 #undef PROG #define PROG gendh_main static void MS_CALLBACK dh_cb(int p, int n, void *arg); int MAIN(int, char **); int MAIN(int argc, char **argv) { DH *dh=NULL; int ret=1,num=DEFBITS; int g=2; char *outfile=NULL; char *inrand=NULL; BIO *out=NULL; apps_startup(); if (bio_err == NULL) if ((bio_err=BIO_new(BIO_s_file())) != NULL) BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT); argv++; argc--; for (;;) { if (argc <= 0) break; if (strcmp(*argv,"-out") == 0) { if (--argc < 1) goto bad; outfile= *(++argv); } else if (strcmp(*argv,"-2") == 0) g=2; /* else if (strcmp(*argv,"-3") == 0) g=3; */ else if (strcmp(*argv,"-5") == 0) g=5; else if (strcmp(*argv,"-rand") == 0) { if (--argc < 1) goto bad; inrand= *(++argv); } else break; argv++; argc--; } if ((argc >= 1) && ((sscanf(*argv,"%d",&num) == 0) || (num < 0))) { bad: BIO_printf(bio_err,"usage: gendh [args] [numbits]\n"); BIO_printf(bio_err," -out file - output the key to 'file\n"); BIO_printf(bio_err," -2 use 2 as the generator value\n"); /* BIO_printf(bio_err," -3 use 3 as the generator value\n"); */ BIO_printf(bio_err," -5 use 5 as the generator value\n"); BIO_printf(bio_err," -rand file%cfile%c...\n", LIST_SEPARATOR_CHAR, LIST_SEPARATOR_CHAR); BIO_printf(bio_err," - load the file (or the files in the directory) into\n"); BIO_printf(bio_err," the random number generator\n"); goto end; } out=BIO_new(BIO_s_file()); if (out == NULL) { ERR_print_errors(bio_err); goto end; } if (outfile == NULL) BIO_set_fp(out,stdout,BIO_NOCLOSE); else { if (BIO_write_filename(out,outfile) <= 0) { perror(outfile); goto end; } } if (!app_RAND_load_file(NULL, bio_err, 1) && inrand == NULL) { BIO_printf(bio_err,"warning, not much extra random data, consider using the -rand option\n"); } if (inrand != NULL) BIO_printf(bio_err,"%ld semi-random bytes loaded\n", app_RAND_load_files(inrand)); BIO_printf(bio_err,"Generating DH parameters, %d bit long strong prime, generator of %d\n",num,g); BIO_printf(bio_err,"This is going to take a long time\n"); dh=DH_generate_parameters(num,g,dh_cb,bio_err); if (dh == NULL) goto end; app_RAND_write_file(NULL, bio_err); if (!PEM_write_bio_DHparams(out,dh)) goto end; ret=0; end: if (ret != 0) ERR_print_errors(bio_err); if (out != NULL) BIO_free(out); if (dh != NULL) DH_free(dh); EXIT(ret); } static void MS_CALLBACK dh_cb(int p, int n, void *arg) { char c='*'; if (p == 0) c='.'; if (p == 1) c='+'; if (p == 2) c='*'; if (p == 3) c='\n'; BIO_write((BIO *)arg,&c,1); (void)BIO_flush((BIO *)arg); #ifdef LINT p=n; #endif } #endif