2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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.
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).
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.
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
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)"
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
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.]
62 #include <sys/types.h>
65 #include <openssl/bio.h>
66 #include <openssl/rand.h>
67 #include <openssl/err.h>
68 #include <openssl/bn.h>
69 #include <openssl/dh.h>
70 #include <openssl/x509.h>
71 #include <openssl/pem.h>
75 #define PROG gendh_main
77 static void MS_CALLBACK dh_cb(int p, int n, char *arg);
78 static long dh_load_rand(char *names);
79 int MAIN(int argc, char **argv)
83 int ret=1,num=DEFBITS;
86 char *inrand=NULL,*randfile;
92 if ((bio_err=BIO_new(BIO_s_file())) != NULL)
93 BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT);
100 if (strcmp(*argv,"-out") == 0)
102 if (--argc < 1) goto bad;
105 else if (strcmp(*argv,"-2") == 0)
107 /* else if (strcmp(*argv,"-3") == 0)
109 else if (strcmp(*argv,"-5") == 0)
111 else if (strcmp(*argv,"-rand") == 0)
113 if (--argc < 1) goto bad;
121 if ((argc >= 1) && ((sscanf(*argv,"%d",&num) == 0) || (num < 0)))
124 BIO_printf(bio_err,"usage: gendh [args] [numbits]\n");
125 BIO_printf(bio_err," -out file - output the key to 'file\n");
126 BIO_printf(bio_err," -2 use 2 as the generator value\n");
127 /* BIO_printf(bio_err," -3 use 3 as the generator value\n"); */
128 BIO_printf(bio_err," -5 use 5 as the generator value\n");
129 BIO_printf(bio_err," -rand file:file:...\n");
130 BIO_printf(bio_err," - load the file (or the files in the directory) into\n");
131 BIO_printf(bio_err," the random number generator\n");
135 out=BIO_new(BIO_s_file());
138 ERR_print_errors(bio_err);
143 BIO_set_fp(out,stdout,BIO_NOCLOSE);
146 if (BIO_write_filename(out,outfile) <= 0)
153 randfile=RAND_file_name(buffer,200);
154 if ((randfile == NULL)|| !RAND_load_file(randfile,1024L*1024L))
155 BIO_printf(bio_err,"unable to load 'random state'\n");
158 BIO_printf(bio_err,"warning, not much extra random data, consider using the -rand option\n");
161 BIO_printf(bio_err,"%ld semi-random bytes loaded\n",
162 dh_load_rand(inrand));
165 BIO_printf(bio_err,"Generating DH parameters, %d bit long strong prime, generator of %d\n",num,g);
166 BIO_printf(bio_err,"This is going to take a long time\n");
167 dh=DH_generate_parameters(num,g,dh_cb,(char *)bio_err);
169 if (dh == NULL) goto end;
171 if (randfile == NULL)
172 BIO_printf(bio_err,"unable to write 'random state'\n");
174 RAND_write_file(randfile);
176 if (!PEM_write_bio_DHparams(out,dh))
181 ERR_print_errors(bio_err);
182 if (out != NULL) BIO_free(out);
183 if (dh != NULL) DH_free(dh);
187 static void MS_CALLBACK dh_cb(int p, int n, char *arg)
195 BIO_write((BIO *)arg,&c,1);
196 BIO_flush((BIO *)arg);
202 static long dh_load_rand(char *name)
211 for (p=name; ((*p != '\0') && (*p != LIST_SEPARATOR_CHAR)); p++);
212 if (*p == '\0') last=1;
216 if (*n == '\0') break;
218 tot+=RAND_load_file(n,1);