1 /*
2 * Copyright 1995-2020 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the OpenSSL license (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
8 */
9
10 #include <openssl/opensslconf.h>
11 #include <stdio.h>
12 #include <stdlib.h>
13 #include <string.h>
14 #include <time.h>
15 #include "apps.h"
16 #include "progs.h"
17 #include <openssl/bio.h>
18 #include <openssl/err.h>
19 #include <openssl/dsa.h>
20 #include <openssl/evp.h>
21 #include <openssl/x509.h>
22 #include <openssl/pem.h>
23 #include <openssl/bn.h>
24
25 typedef enum OPTION_choice {
26 OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
27 OPT_INFORM, OPT_OUTFORM, OPT_IN, OPT_OUT, OPT_ENGINE,
28 /* Do not change the order here; see case statements below */
29 OPT_PVK_NONE, OPT_PVK_WEAK, OPT_PVK_STRONG,
30 OPT_NOOUT, OPT_TEXT, OPT_MODULUS, OPT_PUBIN,
31 OPT_PUBOUT, OPT_CIPHER, OPT_PASSIN, OPT_PASSOUT
32 } OPTION_CHOICE;
33
34 const OPTIONS dsa_options[] = {
35 {"help", OPT_HELP, '-', "Display this summary"},
36 {"inform", OPT_INFORM, 'f', "Input format, DER PEM PVK"},
37 {"outform", OPT_OUTFORM, 'f', "Output format, DER PEM PVK"},
38 {"in", OPT_IN, 's', "Input key"},
39 {"out", OPT_OUT, '>', "Output file"},
40 {"noout", OPT_NOOUT, '-', "Don't print key out"},
41 {"text", OPT_TEXT, '-', "Print the key in text"},
42 {"modulus", OPT_MODULUS, '-', "Print the DSA public value"},
43 {"pubin", OPT_PUBIN, '-', "Expect a public key in input file"},
44 {"pubout", OPT_PUBOUT, '-', "Output public key, not private"},
45 {"passin", OPT_PASSIN, 's', "Input file pass phrase source"},
46 {"passout", OPT_PASSOUT, 's', "Output file pass phrase source"},
47 {"", OPT_CIPHER, '-', "Any supported cipher"},
48 #ifndef OPENSSL_NO_RC4
49 {"pvk-strong", OPT_PVK_STRONG, '-', "Enable 'Strong' PVK encoding level (default)"},
50 {"pvk-weak", OPT_PVK_WEAK, '-', "Enable 'Weak' PVK encoding level"},
51 {"pvk-none", OPT_PVK_NONE, '-', "Don't enforce PVK encoding"},
52 #endif
53 #ifndef OPENSSL_NO_ENGINE
54 {"engine", OPT_ENGINE, 's', "Use engine e, possibly a hardware device"},
55 #endif
56 {NULL}
57 };
58
dsa_main(int argc,char ** argv)59 int dsa_main(int argc, char **argv)
60 {
61 BIO *out = NULL;
62 DSA *dsa = NULL;
63 ENGINE *e = NULL;
64 const EVP_CIPHER *enc = NULL;
65 char *infile = NULL, *outfile = NULL, *prog;
66 char *passin = NULL, *passout = NULL, *passinarg = NULL, *passoutarg = NULL;
67 OPTION_CHOICE o;
68 int informat = FORMAT_PEM, outformat = FORMAT_PEM, text = 0, noout = 0;
69 int i, modulus = 0, pubin = 0, pubout = 0, ret = 1;
70 #ifndef OPENSSL_NO_RC4
71 int pvk_encr = 2;
72 #endif
73 int private = 0;
74
75 prog = opt_init(argc, argv, dsa_options);
76 while ((o = opt_next()) != OPT_EOF) {
77 switch (o) {
78 case OPT_EOF:
79 case OPT_ERR:
80 opthelp:
81 ret = 0;
82 BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
83 goto end;
84 case OPT_HELP:
85 opt_help(dsa_options);
86 ret = 0;
87 goto end;
88 case OPT_INFORM:
89 if (!opt_format(opt_arg(), OPT_FMT_ANY, &informat))
90 goto opthelp;
91 break;
92 case OPT_IN:
93 infile = opt_arg();
94 break;
95 case OPT_OUTFORM:
96 if (!opt_format(opt_arg(), OPT_FMT_ANY, &outformat))
97 goto opthelp;
98 break;
99 case OPT_OUT:
100 outfile = opt_arg();
101 break;
102 case OPT_ENGINE:
103 e = setup_engine(opt_arg(), 0);
104 break;
105 case OPT_PASSIN:
106 passinarg = opt_arg();
107 break;
108 case OPT_PASSOUT:
109 passoutarg = opt_arg();
110 break;
111 case OPT_PVK_STRONG: /* pvk_encr:= 2 */
112 case OPT_PVK_WEAK: /* pvk_encr:= 1 */
113 case OPT_PVK_NONE: /* pvk_encr:= 0 */
114 #ifndef OPENSSL_NO_RC4
115 pvk_encr = (o - OPT_PVK_NONE);
116 #endif
117 break;
118 case OPT_NOOUT:
119 noout = 1;
120 break;
121 case OPT_TEXT:
122 text = 1;
123 break;
124 case OPT_MODULUS:
125 modulus = 1;
126 break;
127 case OPT_PUBIN:
128 pubin = 1;
129 break;
130 case OPT_PUBOUT:
131 pubout = 1;
132 break;
133 case OPT_CIPHER:
134 if (!opt_cipher(opt_unknown(), &enc))
135 goto end;
136 break;
137 }
138 }
139 argc = opt_num_rest();
140 if (argc != 0)
141 goto opthelp;
142
143 private = pubin || pubout ? 0 : 1;
144 if (text && !pubin)
145 private = 1;
146
147 if (!app_passwd(passinarg, passoutarg, &passin, &passout)) {
148 BIO_printf(bio_err, "Error getting passwords\n");
149 goto end;
150 }
151
152 BIO_printf(bio_err, "read DSA key\n");
153 {
154 EVP_PKEY *pkey;
155
156 if (pubin)
157 pkey = load_pubkey(infile, informat, 1, passin, e, "Public Key");
158 else
159 pkey = load_key(infile, informat, 1, passin, e, "Private Key");
160
161 if (pkey != NULL) {
162 dsa = EVP_PKEY_get1_DSA(pkey);
163 EVP_PKEY_free(pkey);
164 }
165 }
166 if (dsa == NULL) {
167 BIO_printf(bio_err, "unable to load Key\n");
168 ERR_print_errors(bio_err);
169 goto end;
170 }
171
172 out = bio_open_owner(outfile, outformat, private);
173 if (out == NULL)
174 goto end;
175
176 if (text) {
177 assert(pubin || private);
178 if (!DSA_print(out, dsa, 0)) {
179 perror(outfile);
180 ERR_print_errors(bio_err);
181 goto end;
182 }
183 }
184
185 if (modulus) {
186 const BIGNUM *pub_key = NULL;
187 DSA_get0_key(dsa, &pub_key, NULL);
188 BIO_printf(out, "Public Key=");
189 BN_print(out, pub_key);
190 BIO_printf(out, "\n");
191 }
192
193 if (noout) {
194 ret = 0;
195 goto end;
196 }
197 BIO_printf(bio_err, "writing DSA key\n");
198 if (outformat == FORMAT_ASN1) {
199 if (pubin || pubout) {
200 i = i2d_DSA_PUBKEY_bio(out, dsa);
201 } else {
202 assert(private);
203 i = i2d_DSAPrivateKey_bio(out, dsa);
204 }
205 } else if (outformat == FORMAT_PEM) {
206 if (pubin || pubout) {
207 i = PEM_write_bio_DSA_PUBKEY(out, dsa);
208 } else {
209 assert(private);
210 i = PEM_write_bio_DSAPrivateKey(out, dsa, enc,
211 NULL, 0, NULL, passout);
212 }
213 #ifndef OPENSSL_NO_RSA
214 } else if (outformat == FORMAT_MSBLOB || outformat == FORMAT_PVK) {
215 EVP_PKEY *pk;
216 pk = EVP_PKEY_new();
217 if (pk == NULL)
218 goto end;
219
220 EVP_PKEY_set1_DSA(pk, dsa);
221 if (outformat == FORMAT_PVK) {
222 if (pubin) {
223 BIO_printf(bio_err, "PVK form impossible with public key input\n");
224 EVP_PKEY_free(pk);
225 goto end;
226 }
227 assert(private);
228 # ifdef OPENSSL_NO_RC4
229 BIO_printf(bio_err, "PVK format not supported\n");
230 EVP_PKEY_free(pk);
231 goto end;
232 # else
233 i = i2b_PVK_bio(out, pk, pvk_encr, 0, passout);
234 # endif
235 } else if (pubin || pubout) {
236 i = i2b_PublicKey_bio(out, pk);
237 } else {
238 assert(private);
239 i = i2b_PrivateKey_bio(out, pk);
240 }
241 EVP_PKEY_free(pk);
242 #endif
243 } else {
244 BIO_printf(bio_err, "bad output format specified for outfile\n");
245 goto end;
246 }
247 if (i <= 0) {
248 BIO_printf(bio_err, "unable to write private key\n");
249 ERR_print_errors(bio_err);
250 goto end;
251 }
252 ret = 0;
253 end:
254 BIO_free_all(out);
255 DSA_free(dsa);
256 release_engine(e);
257 OPENSSL_free(passin);
258 OPENSSL_free(passout);
259 return ret;
260 }
261