Annotation of src/usr.bin/openssl/dh.c, Revision 1.12
1.12 ! guenther 1: /* $OpenBSD: dh.c,v 1.11 2018/02/07 05:47:55 jsing Exp $ */
1.1 jsing 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: #include <openssl/opensslconf.h> /* for OPENSSL_NO_DH */
60:
61: #ifndef OPENSSL_NO_DH
62:
63: #include <stdio.h>
64: #include <stdlib.h>
65: #include <string.h>
66: #include <time.h>
67:
68: #include "apps.h"
69:
70: #include <openssl/bio.h>
71: #include <openssl/bn.h>
72: #include <openssl/err.h>
73: #include <openssl/dh.h>
74: #include <openssl/pem.h>
75: #include <openssl/x509.h>
76:
1.4 doug 77: static struct {
78: int C;
79: int check;
80: char *infile;
81: int informat;
82: int noout;
83: char *outfile;
84: int outformat;
85: int text;
86: } dh_config;
87:
1.12 ! guenther 88: static const struct option dh_options[] = {
1.4 doug 89: {
90: .name = "C",
91: .desc = "Convert DH parameters into C code",
92: .type = OPTION_FLAG,
93: .opt.flag = &dh_config.C,
94: },
95: {
96: .name = "check",
97: .desc = "Check the DH parameters",
98: .type = OPTION_FLAG,
99: .opt.flag = &dh_config.check,
100: },
101: {
102: .name = "in",
103: .argname = "file",
104: .desc = "Input file (default stdin)",
105: .type = OPTION_ARG,
106: .opt.arg = &dh_config.infile,
107: },
108: {
109: .name = "inform",
110: .argname = "format",
111: .desc = "Input format (DER or PEM (default))",
112: .type = OPTION_ARG_FORMAT,
113: .opt.value = &dh_config.informat,
114: },
115: {
116: .name = "noout",
117: .desc = "No output",
118: .type = OPTION_FLAG,
119: .opt.flag = &dh_config.noout,
120: },
121: {
122: .name = "out",
123: .argname = "file",
124: .desc = "Output file (default stdout)",
125: .type = OPTION_ARG,
126: .opt.arg = &dh_config.outfile,
127: },
128: {
129: .name = "outform",
130: .argname = "format",
131: .desc = "Output format (DER or PEM (default))",
132: .type = OPTION_ARG_FORMAT,
133: .opt.value = &dh_config.outformat,
134: },
135: {
136: .name = "text",
137: .desc = "Print a text form of the DH parameters",
138: .type = OPTION_FLAG,
139: .opt.flag = &dh_config.text,
140: },
141: { NULL },
142: };
143:
144: static void
145: dh_usage(void)
146: {
147: fprintf(stderr,
1.6 bcook 148: "usage: dh [-C] [-check] [-in file] [-inform format]\n"
1.4 doug 149: " [-noout] [-out file] [-outform format] [-text]\n\n");
150: options_usage(dh_options);
151: }
1.1 jsing 152:
153: int
154: dh_main(int argc, char **argv)
155: {
156: DH *dh = NULL;
1.4 doug 157: int i;
1.1 jsing 158: BIO *in = NULL, *out = NULL;
1.4 doug 159: int ret = 1;
1.7 doug 160:
161: if (single_execution) {
1.9 deraadt 162: if (pledge("stdio cpath wpath rpath", NULL) == -1) {
1.7 doug 163: perror("pledge");
1.8 doug 164: exit(1);
165: }
1.7 doug 166: }
1.4 doug 167:
168: memset(&dh_config, 0, sizeof(dh_config));
1.1 jsing 169:
1.4 doug 170: dh_config.informat = FORMAT_PEM;
171: dh_config.outformat = FORMAT_PEM;
1.1 jsing 172:
1.4 doug 173: if (options_parse(argc, argv, dh_options, NULL, NULL) != 0) {
174: dh_usage();
1.1 jsing 175: goto end;
176: }
177:
178: in = BIO_new(BIO_s_file());
179: out = BIO_new(BIO_s_file());
1.4 doug 180: if (in == NULL || out == NULL) {
1.1 jsing 181: ERR_print_errors(bio_err);
182: goto end;
183: }
1.4 doug 184: if (dh_config.infile == NULL)
1.1 jsing 185: BIO_set_fp(in, stdin, BIO_NOCLOSE);
186: else {
1.4 doug 187: if (BIO_read_filename(in, dh_config.infile) <= 0) {
188: perror(dh_config.infile);
1.1 jsing 189: goto end;
190: }
191: }
1.4 doug 192: if (dh_config.outfile == NULL) {
1.1 jsing 193: BIO_set_fp(out, stdout, BIO_NOCLOSE);
194: } else {
1.4 doug 195: if (BIO_write_filename(out, dh_config.outfile) <= 0) {
196: perror(dh_config.outfile);
1.1 jsing 197: goto end;
198: }
199: }
200:
1.4 doug 201: if (dh_config.informat == FORMAT_ASN1)
1.1 jsing 202: dh = d2i_DHparams_bio(in, NULL);
1.4 doug 203: else if (dh_config.informat == FORMAT_PEM)
1.1 jsing 204: dh = PEM_read_bio_DHparams(in, NULL, NULL, NULL);
205: else {
206: BIO_printf(bio_err, "bad input format specified\n");
207: goto end;
208: }
209: if (dh == NULL) {
210: BIO_printf(bio_err, "unable to load DH parameters\n");
211: ERR_print_errors(bio_err);
212: goto end;
213: }
1.4 doug 214: if (dh_config.text) {
1.1 jsing 215: DHparams_print(out, dh);
216: }
1.4 doug 217: if (dh_config.check) {
1.1 jsing 218: if (!DH_check(dh, &i)) {
219: ERR_print_errors(bio_err);
220: goto end;
221: }
222: if (i & DH_CHECK_P_NOT_PRIME)
223: printf("p value is not prime\n");
224: if (i & DH_CHECK_P_NOT_SAFE_PRIME)
225: printf("p value is not a safe prime\n");
226: if (i & DH_UNABLE_TO_CHECK_GENERATOR)
227: printf("unable to check the generator value\n");
228: if (i & DH_NOT_SUITABLE_GENERATOR)
229: printf("the g value is not a generator\n");
230: if (i == 0)
231: printf("DH parameters appear to be ok.\n");
232: }
1.4 doug 233: if (dh_config.C) {
1.1 jsing 234: unsigned char *data;
235: int len, l, bits;
236:
237: len = BN_num_bytes(dh->p);
238: bits = BN_num_bits(dh->p);
239: data = malloc(len);
240: if (data == NULL) {
241: perror("malloc");
242: goto end;
243: }
244: l = BN_bn2bin(dh->p, data);
245: printf("static unsigned char dh%d_p[] = {", bits);
246: for (i = 0; i < l; i++) {
247: if ((i % 12) == 0)
248: printf("\n\t");
249: printf("0x%02X, ", data[i]);
250: }
251: printf("\n\t};\n");
252:
253: l = BN_bn2bin(dh->g, data);
254: printf("static unsigned char dh%d_g[] = {", bits);
255: for (i = 0; i < l; i++) {
256: if ((i % 12) == 0)
257: printf("\n\t");
258: printf("0x%02X, ", data[i]);
259: }
260: printf("\n\t};\n\n");
261:
262: printf("DH *get_dh%d()\n\t{\n", bits);
263: printf("\tDH *dh;\n\n");
264: printf("\tif ((dh = DH_new()) == NULL) return(NULL);\n");
265: printf("\tdh->p = BN_bin2bn(dh%d_p, sizeof(dh%d_p), NULL);\n",
266: bits, bits);
267: printf("\tdh->g = BN_bin2bn(dh%d_g, sizeof(dh%d_g), NULL);\n",
268: bits, bits);
269: printf("\tif ((dh->p == NULL) || (dh->g == NULL))\n");
270: printf("\t\treturn(NULL);\n");
271: printf("\treturn(dh);\n\t}\n");
272: free(data);
273: }
1.4 doug 274: if (!dh_config.noout) {
275: if (dh_config.outformat == FORMAT_ASN1)
1.1 jsing 276: i = i2d_DHparams_bio(out, dh);
1.4 doug 277: else if (dh_config.outformat == FORMAT_PEM)
1.1 jsing 278: i = PEM_write_bio_DHparams(out, dh);
279: else {
280: BIO_printf(bio_err, "bad output format specified for outfile\n");
281: goto end;
282: }
283: if (!i) {
284: BIO_printf(bio_err, "unable to write DH parameters\n");
285: ERR_print_errors(bio_err);
286: goto end;
287: }
288: }
289: ret = 0;
290:
1.11 jsing 291: end:
1.1 jsing 292: BIO_free(in);
1.10 jsing 293: BIO_free_all(out);
294: DH_free(dh);
1.1 jsing 295:
296: return (ret);
297: }
298: #endif
![[BACK]](/icons/back.gif){kind=icon}
Return to dh.c CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [local] / src / usr.bin / openssl