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.]
65 #include <openssl/bio.h>
66 #include <openssl/err.h>
67 #include <openssl/bn.h>
68 #include <openssl/dh.h>
69 #include <openssl/x509.h>
70 #include <openssl/pem.h>
73 #define PROG dhparam_main
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 * -check - check the parameters are ok
87 static void MS_CALLBACK dh_cb(int p, int n, void *arg);
89 int MAIN(int argc, char **argv)
92 int i,badops=0,text=0;
93 BIO *in=NULL,*out=NULL;
94 int informat,outformat,check=0,noout=0,C=0,ret=1;
95 char *infile,*outfile,*prog;
102 if ((bio_err=BIO_new(BIO_s_file())) != NULL)
103 BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT);
108 outformat=FORMAT_PEM;
115 if (strcmp(*argv,"-inform") == 0)
117 if (--argc < 1) goto bad;
118 informat=str2fmt(*(++argv));
120 else if (strcmp(*argv,"-outform") == 0)
122 if (--argc < 1) goto bad;
123 outformat=str2fmt(*(++argv));
125 else if (strcmp(*argv,"-in") == 0)
127 if (--argc < 1) goto bad;
130 else if (strcmp(*argv,"-out") == 0)
132 if (--argc < 1) goto bad;
135 else if (strcmp(*argv,"-check") == 0)
137 else if (strcmp(*argv,"-text") == 0)
139 else if (strcmp(*argv,"-C") == 0)
141 else if (strcmp(*argv,"-noout") == 0)
143 else if (strcmp(*argv,"-2") == 0)
145 else if (strcmp(*argv,"-5") == 0)
147 else if (strcmp(*argv,"-rand") == 0)
149 if (--argc < 1) goto bad;
152 else if (((sscanf(*argv,"%d",&num) == 0) || (num <= 0)))
161 BIO_printf(bio_err,"%s [options] [numbits]\n",prog);
162 BIO_printf(bio_err,"where options are\n");
163 BIO_printf(bio_err," -inform arg input format - one of DER PEM\n");
164 BIO_printf(bio_err," -outform arg output format - one of DER PEM\n");
165 BIO_printf(bio_err," -in arg input file\n");
166 BIO_printf(bio_err," -out arg output file\n");
167 BIO_printf(bio_err," -check check the DH parameters\n");
168 BIO_printf(bio_err," -text print a text form of the DH parameters\n");
169 BIO_printf(bio_err," -C Output C code\n");
170 BIO_printf(bio_err," -2 generate parameters using 2 as the generator value\n");
171 BIO_printf(bio_err," -5 generate parameters using 5 as the generator value\n");
172 BIO_printf(bio_err," numbits number of bits in to generate (default 512)\n");
173 BIO_printf(bio_err," -rand file:file:...\n");
174 BIO_printf(bio_err," - load the file (or the files in the directory) into\n");
175 BIO_printf(bio_err," the random number generator\n");
176 BIO_printf(bio_err," -noout no output\n");
180 ERR_load_crypto_strings();
182 if(g && !num) num = DEFBITS;
183 else if(num && !g) g = 2;
187 if (!app_RAND_load_file(NULL, bio_err, 1) && inrand == NULL)
189 BIO_printf(bio_err,"warning, not much extra random data, consider using the -rand option\n");
192 BIO_printf(bio_err,"%ld semi-random bytes loaded\n",
193 app_RAND_load_files(inrand));
195 BIO_printf(bio_err,"Generating DH parameters, %d bit long strong prime, generator of %d\n",num,g);
196 BIO_printf(bio_err,"This is going to take a long time\n");
197 dh=DH_generate_parameters(num,g,dh_cb,bio_err);
199 if (dh == NULL) goto end;
201 app_RAND_write_file(NULL, bio_err);
204 in=BIO_new(BIO_s_file());
207 ERR_print_errors(bio_err);
211 BIO_set_fp(in,stdin,BIO_NOCLOSE);
214 if (BIO_read_filename(in,infile) <= 0)
221 if (informat == FORMAT_ASN1)
222 dh=d2i_DHparams_bio(in,NULL);
223 else if (informat == FORMAT_PEM)
224 dh=PEM_read_bio_DHparams(in,NULL,NULL,NULL);
227 BIO_printf(bio_err,"bad input format specified\n");
232 BIO_printf(bio_err,"unable to load DH parameters\n");
233 ERR_print_errors(bio_err);
239 out=BIO_new(BIO_s_file());
242 ERR_print_errors(bio_err);
246 BIO_set_fp(out,stdout,BIO_NOCLOSE);
249 if (BIO_write_filename(out,outfile) <= 0)
260 DHparams_print(out,dh);
265 if (!DH_check(dh,&i))
267 ERR_print_errors(bio_err);
270 if (i & DH_CHECK_P_NOT_PRIME)
271 printf("p value is not prime\n");
272 if (i & DH_CHECK_P_NOT_STRONG_PRIME)
273 printf("p value is not a strong prime\n");
274 if (i & DH_UNABLE_TO_CHECK_GENERATOR)
275 printf("unable to check the generator value\n");
276 if (i & DH_NOT_SUITABLE_GENERATOR)
277 printf("the g value is not a generator\n");
279 printf("DH parameters appear to be ok.\n");
286 len=BN_num_bytes(dh->p);
287 bits=BN_num_bits(dh->p);
288 data=(unsigned char *)Malloc(len);
294 l=BN_bn2bin(dh->p,data);
295 printf("static unsigned char dh%d_p[]={",bits);
298 if ((i%12) == 0) printf("\n\t");
299 printf("0x%02X,",data[i]);
303 l=BN_bn2bin(dh->g,data);
304 printf("static unsigned char dh%d_g[]={",bits);
307 if ((i%12) == 0) printf("\n\t");
308 printf("0x%02X,",data[i]);
310 printf("\n\t};\n\n");
312 printf("DH *get_dh%d()\n\t{\n",bits);
313 printf("\tDH *dh;\n\n");
314 printf("\tif ((dh=DH_new()) == NULL) return(NULL);\n");
315 printf("\tdh->p=BN_bin2bn(dh%d_p,sizeof(dh%d_p),NULL);\n",
317 printf("\tdh->g=BN_bin2bn(dh%d_g,sizeof(dh%d_g),NULL);\n",
319 printf("\tif ((dh->p == NULL) || (dh->g == NULL))\n");
320 printf("\t\treturn(NULL);\n");
321 printf("\treturn(dh);\n\t}\n");
328 if (outformat == FORMAT_ASN1)
329 i=i2d_DHparams_bio(out,dh);
330 else if (outformat == FORMAT_PEM)
331 i=PEM_write_bio_DHparams(out,dh);
333 BIO_printf(bio_err,"bad output format specified for outfile\n");
338 BIO_printf(bio_err,"unable to write DH paramaters\n");
339 ERR_print_errors(bio_err);
345 if (in != NULL) BIO_free(in);
346 if (out != NULL) BIO_free(out);
347 if (dh != NULL) DH_free(dh);
351 static void MS_CALLBACK dh_cb(int p, int n, void *arg)
359 BIO_write((BIO *)arg,&c,1);
360 (void)BIO_flush((BIO *)arg);