Annotation of src/usr.bin/openssl/dsa.c, Revision 1.18
1.18 ! tb 1: /* $OpenBSD: dsa.c,v 1.17 2022/11/11 17:07:38 joshua 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: #include <stdio.h>
62: #include <stdlib.h>
63: #include <time.h>
64: #include <string.h>
65:
66: #include "apps.h"
67:
68: #include <openssl/bio.h>
69: #include <openssl/bn.h>
70: #include <openssl/dsa.h>
71: #include <openssl/err.h>
72: #include <openssl/evp.h>
73: #include <openssl/pem.h>
74: #include <openssl/x509.h>
75:
1.3 doug 76: static struct {
77: const EVP_CIPHER *enc;
78: char *infile;
79: int informat;
80: int modulus;
81: int noout;
82: char *outfile;
83: int outformat;
84: char *passargin;
85: char *passargout;
86: int pubin;
87: int pubout;
88: int pvk_encr;
89: int text;
1.18 ! tb 90: } cfg;
1.3 doug 91:
92: static int
93: dsa_opt_enc(int argc, char **argv, int *argsused)
94: {
95: char *name = argv[0];
96:
97: if (*name++ != '-')
98: return (1);
99:
1.18 ! tb 100: if ((cfg.enc = EVP_get_cipherbyname(name)) != NULL) {
1.3 doug 101: *argsused = 1;
102: return (0);
103: }
104:
105: return (1);
106: }
107:
1.15 guenther 108: static const struct option dsa_options[] = {
1.3 doug 109: {
110: .name = "in",
111: .argname = "file",
112: .desc = "Input file (default stdin)",
113: .type = OPTION_ARG,
1.18 ! tb 114: .opt.arg = &cfg.infile,
1.3 doug 115: },
116: {
117: .name = "inform",
118: .argname = "format",
119: .desc = "Input format (PEM (default) or any other supported"
120: " format)",
121: .type = OPTION_ARG_FORMAT,
1.18 ! tb 122: .opt.value = &cfg.informat,
1.3 doug 123: },
124: {
1.14 inoguchi 125: .name = "modulus",
126: .desc = "Print the DSA public value",
127: .type = OPTION_FLAG,
1.18 ! tb 128: .opt.flag = &cfg.modulus,
1.14 inoguchi 129: },
130: {
1.3 doug 131: .name = "noout",
132: .desc = "No output",
133: .type = OPTION_FLAG,
1.18 ! tb 134: .opt.flag = &cfg.noout,
1.3 doug 135: },
136: {
137: .name = "out",
138: .argname = "file",
139: .desc = "Output file (default stdout)",
140: .type = OPTION_ARG,
1.18 ! tb 141: .opt.arg = &cfg.outfile,
1.3 doug 142: },
143: {
144: .name = "outform",
145: .argname = "format",
146: .desc = "Output format (DER, MSBLOB, PEM (default) or PVK)",
147: .type = OPTION_ARG_FORMAT,
1.18 ! tb 148: .opt.value = &cfg.outformat,
1.3 doug 149: },
150: {
151: .name = "passin",
152: .argname = "source",
153: .desc = "Input file passphrase source",
154: .type = OPTION_ARG,
1.18 ! tb 155: .opt.arg = &cfg.passargin,
1.3 doug 156: },
157: {
158: .name = "passout",
159: .argname = "source",
160: .desc = "Output file passphrase source",
161: .type = OPTION_ARG,
1.18 ! tb 162: .opt.arg = &cfg.passargout,
1.3 doug 163: },
164: {
165: .name = "pubin",
166: .desc = "Read a public key from the input file instead of"
167: " private key",
168: .type = OPTION_FLAG,
1.18 ! tb 169: .opt.flag = &cfg.pubin,
1.3 doug 170: },
171: {
172: .name = "pubout",
173: .desc = "Output a public key instead of private key",
174: .type = OPTION_FLAG,
1.18 ! tb 175: .opt.flag = &cfg.pubout,
1.3 doug 176: },
177: {
178: .name = "pvk-none",
179: .desc = "PVK encryption level",
180: .type = OPTION_VALUE,
181: .value = 0,
1.18 ! tb 182: .opt.value = &cfg.pvk_encr,
1.3 doug 183: },
184: {
185: .name = "pvk-strong",
186: .desc = "PVK encryption level (default)",
187: .type = OPTION_VALUE,
188: .value = 2,
1.18 ! tb 189: .opt.value = &cfg.pvk_encr,
1.3 doug 190: },
191: {
192: .name = "pvk-weak",
193: .desc = "PVK encryption level",
194: .type = OPTION_VALUE,
195: .value = 1,
1.18 ! tb 196: .opt.value = &cfg.pvk_encr,
1.3 doug 197: },
198: {
199: .name = "text",
200: .desc = "Print the key in text form",
201: .type = OPTION_FLAG,
1.18 ! tb 202: .opt.flag = &cfg.text,
1.3 doug 203: },
204: {
205: .name = NULL,
206: .type = OPTION_ARGV_FUNC,
207: .opt.argvfunc = dsa_opt_enc,
208: },
209: { NULL },
210: };
211:
212: static void
213: dsa_usage(void)
214: {
1.13 inoguchi 215: int n = 0;
216:
1.3 doug 217: fprintf(stderr,
1.14 inoguchi 218: "usage: dsa [-in file] [-inform format] [-modulus] [-noout]\n"
1.3 doug 219: " [-out file] [-outform format] [-passin src] [-passout src]\n"
220: " [-pubin] [-pubout] [-pvk-none | -pvk-strong | -pvk-weak]\n"
221: " [-text] [-ciphername]\n\n");
222: options_usage(dsa_options);
223: fprintf(stderr, "\n");
224:
225: fprintf(stderr, "Valid ciphername values:\n\n");
1.13 inoguchi 226: OBJ_NAME_do_all_sorted(OBJ_NAME_TYPE_CIPHER_METH, show_cipher, &n);
1.3 doug 227: fprintf(stderr, "\n");
228: }
1.1 jsing 229:
230: int
231: dsa_main(int argc, char **argv)
232: {
233: int ret = 1;
234: DSA *dsa = NULL;
1.3 doug 235: int i;
1.1 jsing 236: BIO *in = NULL, *out = NULL;
237: char *passin = NULL, *passout = NULL;
1.6 doug 238:
1.17 joshua 239: if (pledge("stdio cpath wpath rpath tty", NULL) == -1) {
240: perror("pledge");
241: exit(1);
1.6 doug 242: }
1.1 jsing 243:
1.18 ! tb 244: memset(&cfg, 0, sizeof(cfg));
1.1 jsing 245:
1.18 ! tb 246: cfg.pvk_encr = 2;
! 247: cfg.informat = FORMAT_PEM;
! 248: cfg.outformat = FORMAT_PEM;
1.1 jsing 249:
1.3 doug 250: if (options_parse(argc, argv, dsa_options, NULL, NULL) != 0) {
251: dsa_usage();
1.1 jsing 252: goto end;
253: }
254:
1.18 ! tb 255: if (!app_passwd(bio_err, cfg.passargin, cfg.passargout,
1.3 doug 256: &passin, &passout)) {
1.1 jsing 257: BIO_printf(bio_err, "Error getting passwords\n");
258: goto end;
259: }
1.3 doug 260:
1.1 jsing 261: in = BIO_new(BIO_s_file());
262: out = BIO_new(BIO_s_file());
1.3 doug 263: if (in == NULL || out == NULL) {
1.1 jsing 264: ERR_print_errors(bio_err);
265: goto end;
266: }
1.18 ! tb 267: if (cfg.infile == NULL)
1.1 jsing 268: BIO_set_fp(in, stdin, BIO_NOCLOSE);
269: else {
1.18 ! tb 270: if (BIO_read_filename(in, cfg.infile) <= 0) {
! 271: perror(cfg.infile);
1.1 jsing 272: goto end;
273: }
274: }
275:
276: BIO_printf(bio_err, "read DSA key\n");
277:
278: {
279: EVP_PKEY *pkey;
280:
1.18 ! tb 281: if (cfg.pubin)
! 282: pkey = load_pubkey(bio_err, cfg.infile,
! 283: cfg.informat, 1, passin, "Public Key");
1.1 jsing 284: else
1.18 ! tb 285: pkey = load_key(bio_err, cfg.infile,
! 286: cfg.informat, 1, passin, "Private Key");
1.1 jsing 287:
288: if (pkey) {
289: dsa = EVP_PKEY_get1_DSA(pkey);
290: EVP_PKEY_free(pkey);
291: }
292: }
293: if (dsa == NULL) {
294: BIO_printf(bio_err, "unable to load Key\n");
295: ERR_print_errors(bio_err);
296: goto end;
297: }
1.18 ! tb 298: if (cfg.outfile == NULL) {
1.1 jsing 299: BIO_set_fp(out, stdout, BIO_NOCLOSE);
300: } else {
1.18 ! tb 301: if (BIO_write_filename(out, cfg.outfile) <= 0) {
! 302: perror(cfg.outfile);
1.1 jsing 303: goto end;
304: }
305: }
306:
1.18 ! tb 307: if (cfg.text) {
1.1 jsing 308: if (!DSA_print(out, dsa, 0)) {
1.18 ! tb 309: perror(cfg.outfile);
1.1 jsing 310: ERR_print_errors(bio_err);
311: goto end;
312: }
313: }
1.18 ! tb 314: if (cfg.modulus) {
1.1 jsing 315: fprintf(stdout, "Public Key=");
1.16 tb 316: BN_print(out, DSA_get0_pub_key(dsa));
1.1 jsing 317: fprintf(stdout, "\n");
318: }
1.18 ! tb 319: if (cfg.noout)
1.1 jsing 320: goto end;
321: BIO_printf(bio_err, "writing DSA key\n");
1.18 ! tb 322: if (cfg.outformat == FORMAT_ASN1) {
! 323: if (cfg.pubin || cfg.pubout)
1.1 jsing 324: i = i2d_DSA_PUBKEY_bio(out, dsa);
325: else
326: i = i2d_DSAPrivateKey_bio(out, dsa);
1.18 ! tb 327: } else if (cfg.outformat == FORMAT_PEM) {
! 328: if (cfg.pubin || cfg.pubout)
1.1 jsing 329: i = PEM_write_bio_DSA_PUBKEY(out, dsa);
330: else
1.18 ! tb 331: i = PEM_write_bio_DSAPrivateKey(out, dsa, cfg.enc,
1.1 jsing 332: NULL, 0, NULL, passout);
333: #if !defined(OPENSSL_NO_RSA) && !defined(OPENSSL_NO_RC4)
1.18 ! tb 334: } else if (cfg.outformat == FORMAT_MSBLOB ||
! 335: cfg.outformat == FORMAT_PVK) {
1.1 jsing 336: EVP_PKEY *pk;
337: pk = EVP_PKEY_new();
338: EVP_PKEY_set1_DSA(pk, dsa);
1.18 ! tb 339: if (cfg.outformat == FORMAT_PVK)
! 340: i = i2b_PVK_bio(out, pk, cfg.pvk_encr, 0,
1.3 doug 341: passout);
1.18 ! tb 342: else if (cfg.pubin || cfg.pubout)
1.1 jsing 343: i = i2b_PublicKey_bio(out, pk);
344: else
345: i = i2b_PrivateKey_bio(out, pk);
346: EVP_PKEY_free(pk);
347: #endif
348: } else {
349: BIO_printf(bio_err, "bad output format specified for outfile\n");
350: goto end;
351: }
352: if (i <= 0) {
353: BIO_printf(bio_err, "unable to write private key\n");
354: ERR_print_errors(bio_err);
355: } else
356: ret = 0;
1.11 jsing 357: end:
1.1 jsing 358: BIO_free(in);
1.10 jsing 359: BIO_free_all(out);
360: DSA_free(dsa);
1.1 jsing 361: free(passin);
362: free(passout);
363:
364: return (ret);
365: }
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