Annotation of src/usr.bin/openssl/dsaparam.c, Revision 1.9
1.9 ! jsing 1: /* $OpenBSD: dsaparam.c,v 1.8 2017/01/20 08:57:12 deraadt 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_DSA */
60:
61: /* Until the key-gen callbacks are modified to use newer prototypes, we allow
62: * deprecated functions for openssl-internal code */
63: #ifdef OPENSSL_NO_DEPRECATED
64: #undef OPENSSL_NO_DEPRECATED
65: #endif
66:
1.3 doug 67: #include <limits.h>
1.1 jsing 68: #include <stdio.h>
69: #include <stdlib.h>
70: #include <string.h>
71: #include <time.h>
72:
73: #include "apps.h"
74:
75: #include <openssl/bio.h>
76: #include <openssl/bn.h>
77: #include <openssl/err.h>
78: #include <openssl/dsa.h>
79: #include <openssl/pem.h>
80: #include <openssl/x509.h>
81:
1.3 doug 82: static struct {
83: int C;
84: int genkey;
85: char *infile;
86: int informat;
87: int noout;
88: char *outfile;
89: int outformat;
90: int text;
91: } dsaparam_config;
92:
93: static struct option dsaparam_options[] = {
94: {
95: .name = "C",
96: .desc = "Convert DSA parameters into C code",
97: .type = OPTION_FLAG,
98: .opt.flag = &dsaparam_config.C,
99: },
100: {
101: .name = "genkey",
102: .desc = "Generate a DSA key",
103: .type = OPTION_FLAG,
104: .opt.flag = &dsaparam_config.genkey,
105: },
106: {
107: .name = "in",
108: .argname = "file",
109: .desc = "Input file (default stdin)",
110: .type = OPTION_ARG,
111: .opt.arg = &dsaparam_config.infile,
112: },
113: {
114: .name = "inform",
115: .argname = "format",
116: .desc = "Input format (DER or PEM (default))",
117: .type = OPTION_ARG_FORMAT,
118: .opt.value = &dsaparam_config.informat,
119: },
120: {
121: .name = "noout",
122: .desc = "No output",
123: .type = OPTION_FLAG,
124: .opt.flag = &dsaparam_config.noout,
125: },
126: {
127: .name = "out",
128: .argname = "file",
129: .desc = "Output file (default stdout)",
130: .type = OPTION_ARG,
131: .opt.arg = &dsaparam_config.outfile,
132: },
133: {
134: .name = "outform",
135: .argname = "format",
136: .desc = "Output format (DER or PEM (default))",
137: .type = OPTION_ARG_FORMAT,
138: .opt.value = &dsaparam_config.outformat,
139: },
140: {
141: .name = "text",
142: .desc = "Print as text",
143: .type = OPTION_FLAG,
144: .opt.flag = &dsaparam_config.text,
145: },
146: { NULL },
147: };
1.1 jsing 148:
149: static void
1.3 doug 150: dsaparam_usage(void)
1.1 jsing 151: {
1.3 doug 152: fprintf(stderr,
1.5 bcook 153: "usage: dsaparam [-C] [-genkey] [-in file]\n"
1.3 doug 154: " [-inform format] [-noout] [-out file] [-outform format]\n"
155: " [-text] [numbits]\n\n");
156: options_usage(dsaparam_options);
1.1 jsing 157: }
158:
159: static int dsa_cb(int p, int n, BN_GENCB * cb);
160:
161: int
162: dsaparam_main(int argc, char **argv)
163: {
164: DSA *dsa = NULL;
1.3 doug 165: int i;
1.1 jsing 166: BIO *in = NULL, *out = NULL;
1.3 doug 167: int ret = 1;
168: int numbits = -1;
169: char *strbits = NULL;
1.6 doug 170:
171: if (single_execution) {
1.8 deraadt 172: if (pledge("stdio cpath wpath rpath", NULL) == -1) {
1.6 doug 173: perror("pledge");
1.7 doug 174: exit(1);
175: }
1.6 doug 176: }
1.3 doug 177:
178: memset(&dsaparam_config, 0, sizeof(dsaparam_config));
179:
180: dsaparam_config.informat = FORMAT_PEM;
181: dsaparam_config.outformat = FORMAT_PEM;
1.1 jsing 182:
1.3 doug 183: if (options_parse(argc, argv, dsaparam_options, &strbits, NULL) != 0) {
184: dsaparam_usage();
185: goto end;
1.1 jsing 186: }
187:
1.3 doug 188: if (strbits != NULL) {
189: const char *errstr;
190: numbits = strtonum(strbits, 0, INT_MAX, &errstr);
191: if (errstr) {
192: fprintf(stderr, "Invalid number of bits: %s", errstr);
193: goto end;
194: }
1.1 jsing 195: }
196:
197: in = BIO_new(BIO_s_file());
198: out = BIO_new(BIO_s_file());
1.3 doug 199: if (in == NULL || out == NULL) {
1.1 jsing 200: ERR_print_errors(bio_err);
201: goto end;
202: }
1.3 doug 203: if (dsaparam_config.infile == NULL)
1.1 jsing 204: BIO_set_fp(in, stdin, BIO_NOCLOSE);
205: else {
1.3 doug 206: if (BIO_read_filename(in, dsaparam_config.infile) <= 0) {
207: perror(dsaparam_config.infile);
1.1 jsing 208: goto end;
209: }
210: }
1.3 doug 211: if (dsaparam_config.outfile == NULL) {
1.1 jsing 212: BIO_set_fp(out, stdout, BIO_NOCLOSE);
213: } else {
1.3 doug 214: if (BIO_write_filename(out, dsaparam_config.outfile) <= 0) {
215: perror(dsaparam_config.outfile);
1.1 jsing 216: goto end;
217: }
218: }
219:
220: if (numbits > 0) {
221: BN_GENCB cb;
222: BN_GENCB_set(&cb, dsa_cb, bio_err);
223: dsa = DSA_new();
224: if (!dsa) {
225: BIO_printf(bio_err, "Error allocating DSA object\n");
226: goto end;
227: }
1.3 doug 228: BIO_printf(bio_err, "Generating DSA parameters, %d bit long prime\n", numbits);
1.1 jsing 229: BIO_printf(bio_err, "This could take some time\n");
1.3 doug 230: if (!DSA_generate_parameters_ex(dsa, numbits, NULL, 0, NULL, NULL, &cb)) {
1.1 jsing 231: ERR_print_errors(bio_err);
232: BIO_printf(bio_err, "Error, DSA key generation failed\n");
233: goto end;
234: }
1.3 doug 235: } else if (dsaparam_config.informat == FORMAT_ASN1)
1.1 jsing 236: dsa = d2i_DSAparams_bio(in, NULL);
1.3 doug 237: else if (dsaparam_config.informat == FORMAT_PEM)
1.1 jsing 238: dsa = PEM_read_bio_DSAparams(in, NULL, NULL, NULL);
239: else {
240: BIO_printf(bio_err, "bad input format specified\n");
241: goto end;
242: }
243: if (dsa == NULL) {
244: BIO_printf(bio_err, "unable to load DSA parameters\n");
245: ERR_print_errors(bio_err);
246: goto end;
247: }
1.3 doug 248: if (dsaparam_config.text) {
1.1 jsing 249: DSAparams_print(out, dsa);
250: }
1.3 doug 251: if (dsaparam_config.C) {
1.1 jsing 252: unsigned char *data;
253: int l, len, bits_p;
254:
255: len = BN_num_bytes(dsa->p);
256: bits_p = BN_num_bits(dsa->p);
257: data = malloc(len + 20);
258: if (data == NULL) {
259: perror("malloc");
260: goto end;
261: }
262: l = BN_bn2bin(dsa->p, data);
263: printf("static unsigned char dsa%d_p[] = {", bits_p);
264: for (i = 0; i < l; i++) {
265: if ((i % 12) == 0)
266: printf("\n\t");
267: printf("0x%02X, ", data[i]);
268: }
269: printf("\n\t};\n");
270:
271: l = BN_bn2bin(dsa->q, data);
272: printf("static unsigned char dsa%d_q[] = {", bits_p);
273: for (i = 0; i < l; i++) {
274: if ((i % 12) == 0)
275: printf("\n\t");
276: printf("0x%02X, ", data[i]);
277: }
278: printf("\n\t};\n");
279:
280: l = BN_bn2bin(dsa->g, data);
281: printf("static unsigned char dsa%d_g[] = {", bits_p);
282: for (i = 0; i < l; i++) {
283: if ((i % 12) == 0)
284: printf("\n\t");
285: printf("0x%02X, ", data[i]);
286: }
287: free(data);
288: printf("\n\t};\n\n");
289:
290: printf("DSA *get_dsa%d()\n\t{\n", bits_p);
291: printf("\tDSA *dsa;\n\n");
292: printf("\tif ((dsa = DSA_new()) == NULL) return(NULL);\n");
293: printf("\tdsa->p = BN_bin2bn(dsa%d_p, sizeof(dsa%d_p), NULL);\n",
294: bits_p, bits_p);
295: printf("\tdsa->q = BN_bin2bn(dsa%d_q, sizeof(dsa%d_q), NULL);\n",
296: bits_p, bits_p);
297: printf("\tdsa->g = BN_bin2bn(dsa%d_g, sizeof(dsa%d_g), NULL);\n",
298: bits_p, bits_p);
299: printf("\tif ((dsa->p == NULL) || (dsa->q == NULL) || (dsa->g == NULL))\n");
300: printf("\t\t{ DSA_free(dsa); return(NULL); }\n");
301: printf("\treturn(dsa);\n\t}\n");
302: }
1.3 doug 303: if (!dsaparam_config.noout) {
304: if (dsaparam_config.outformat == FORMAT_ASN1)
1.1 jsing 305: i = i2d_DSAparams_bio(out, dsa);
1.3 doug 306: else if (dsaparam_config.outformat == FORMAT_PEM)
1.1 jsing 307: i = PEM_write_bio_DSAparams(out, dsa);
308: else {
309: BIO_printf(bio_err, "bad output format specified for outfile\n");
310: goto end;
311: }
312: if (!i) {
313: BIO_printf(bio_err, "unable to write DSA parameters\n");
314: ERR_print_errors(bio_err);
315: goto end;
316: }
317: }
1.3 doug 318: if (dsaparam_config.genkey) {
1.1 jsing 319: DSA *dsakey;
320:
321: if ((dsakey = DSAparams_dup(dsa)) == NULL)
322: goto end;
323: if (!DSA_generate_key(dsakey)) {
324: ERR_print_errors(bio_err);
325: DSA_free(dsakey);
326: goto end;
327: }
1.3 doug 328: if (dsaparam_config.outformat == FORMAT_ASN1)
1.1 jsing 329: i = i2d_DSAPrivateKey_bio(out, dsakey);
1.3 doug 330: else if (dsaparam_config.outformat == FORMAT_PEM)
1.1 jsing 331: i = PEM_write_bio_DSAPrivateKey(out, dsakey, NULL, NULL, 0, NULL, NULL);
332: else {
333: BIO_printf(bio_err, "bad output format specified for outfile\n");
334: DSA_free(dsakey);
335: goto end;
336: }
337: DSA_free(dsakey);
338: }
339: ret = 0;
340:
341: end:
342: BIO_free(in);
1.9 ! jsing 343: BIO_free_all(out);
! 344: DSA_free(dsa);
1.1 jsing 345:
346: return (ret);
347: }
348:
349: static int
350: dsa_cb(int p, int n, BN_GENCB * cb)
351: {
352: char c = '*';
353:
354: if (p == 0)
355: c = '.';
356: if (p == 1)
357: c = '+';
358: if (p == 2)
359: c = '*';
360: if (p == 3)
361: c = '\n';
362: BIO_write(cb->arg, &c, 1);
363: (void) BIO_flush(cb->arg);
364: #ifdef GENCB_TEST
365: if (stop_keygen_flag)
366: return 0;
367: #endif
368: return 1;
369: }
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