1 /*
2 * Copyright 1995-2023 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the Apache License 2.0 (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
12 #include <stdio.h>
13 #include <stdlib.h>
14 #include <string.h>
15 #include <time.h>
16 #include "apps.h"
17 #include "progs.h"
18 #include <openssl/bio.h>
19 #include <openssl/err.h>
20 #include <openssl/dsa.h>
21 #include <openssl/evp.h>
22 #include <openssl/x509.h>
23 #include <openssl/pem.h>
24 #include <openssl/bn.h>
25 #include <openssl/encoder.h>
26 #include <openssl/core_names.h>
27 #include <openssl/core_dispatch.h>
28
29 #ifndef OPENSSL_NO_RC4
30 #define DEFAULT_PVK_ENCR_STRENGTH 2
31 #else
32 #define DEFAULT_PVK_ENCR_STRENGTH 0
33 #endif
34
35 typedef enum OPTION_choice {
36 OPT_COMMON,
37 OPT_INFORM,
38 OPT_OUTFORM,
39 OPT_IN,
40 OPT_OUT,
41 OPT_ENGINE,
42 /* Do not change the order here; see case statements below */
43 OPT_PVK_NONE,
44 OPT_PVK_WEAK,
45 OPT_PVK_STRONG,
46 OPT_NOOUT,
47 OPT_TEXT,
48 OPT_MODULUS,
49 OPT_PUBIN,
50 OPT_PUBOUT,
51 OPT_CIPHER,
52 OPT_PASSIN,
53 OPT_PASSOUT,
54 OPT_PROV_ENUM
55 } OPTION_CHOICE;
56
57 const OPTIONS dsa_options[] = {
58 OPT_SECTION("General"),
59 { "help", OPT_HELP, '-', "Display this summary" },
60 { "", OPT_CIPHER, '-', "Any supported cipher" },
61 #ifndef OPENSSL_NO_RC4
62 { "pvk-strong", OPT_PVK_STRONG, '-', "Enable 'Strong' PVK encoding level (default)" },
63 { "pvk-weak", OPT_PVK_WEAK, '-', "Enable 'Weak' PVK encoding level" },
64 { "pvk-none", OPT_PVK_NONE, '-', "Don't enforce PVK encoding" },
65 #endif
66 #ifndef OPENSSL_NO_ENGINE
67 { "engine", OPT_ENGINE, 's', "Use engine e, possibly a hardware device" },
68 #endif
69
70 OPT_SECTION("Input"),
71 { "in", OPT_IN, 's', "Input key" },
72 { "inform", OPT_INFORM, 'f', "Input format (DER/PEM/PVK); has no effect" },
73 { "pubin", OPT_PUBIN, '-', "Expect a public key in input file" },
74 { "passin", OPT_PASSIN, 's', "Input file pass phrase source" },
75
76 OPT_SECTION("Output"),
77 { "out", OPT_OUT, '>', "Output file" },
78 { "outform", OPT_OUTFORM, 'f', "Output format, DER PEM PVK" },
79 { "noout", OPT_NOOUT, '-', "Don't print key out" },
80 { "text", OPT_TEXT, '-', "Print the key in text" },
81 { "modulus", OPT_MODULUS, '-', "Print the DSA public value" },
82 { "pubout", OPT_PUBOUT, '-', "Output public key, not private" },
83 { "passout", OPT_PASSOUT, 's', "Output file pass phrase source" },
84
85 OPT_PROV_OPTIONS,
86 { NULL }
87 };
88
dsa_main(int argc,char ** argv)89 int dsa_main(int argc, char **argv)
90 {
91 BIO *out = NULL;
92 ENGINE *e = NULL;
93 EVP_PKEY *pkey = NULL;
94 EVP_CIPHER *enc = NULL;
95 char *infile = NULL, *outfile = NULL, *prog;
96 char *passin = NULL, *passout = NULL, *passinarg = NULL, *passoutarg = NULL;
97 OPTION_CHOICE o;
98 int informat = FORMAT_UNDEF, outformat = FORMAT_PEM, text = 0, noout = 0;
99 int modulus = 0, pubin = 0, pubout = 0, ret = 1;
100 int pvk_encr = DEFAULT_PVK_ENCR_STRENGTH;
101 int private = 0;
102 const char *output_type = NULL, *ciphername = NULL;
103 const char *output_structure = NULL;
104 int selection = 0;
105 OSSL_ENCODER_CTX *ectx = NULL;
106
107 opt_set_unknown_name("cipher");
108 prog = opt_init(argc, argv, dsa_options);
109 while ((o = opt_next()) != OPT_EOF) {
110 switch (o) {
111 case OPT_EOF:
112 case OPT_ERR:
113 opthelp:
114 ret = 0;
115 BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
116 goto end;
117 case OPT_HELP:
118 opt_help(dsa_options);
119 ret = 0;
120 goto end;
121 case OPT_INFORM:
122 if (!opt_format(opt_arg(), OPT_FMT_ANY, &informat))
123 goto opthelp;
124 break;
125 case OPT_IN:
126 infile = opt_arg();
127 break;
128 case OPT_OUTFORM:
129 if (!opt_format(opt_arg(), OPT_FMT_ANY, &outformat))
130 goto opthelp;
131 break;
132 case OPT_OUT:
133 outfile = opt_arg();
134 break;
135 case OPT_ENGINE:
136 e = setup_engine(opt_arg(), 0);
137 break;
138 case OPT_PASSIN:
139 passinarg = opt_arg();
140 break;
141 case OPT_PASSOUT:
142 passoutarg = opt_arg();
143 break;
144 case OPT_PVK_STRONG: /* pvk_encr:= 2 */
145 case OPT_PVK_WEAK: /* pvk_encr:= 1 */
146 case OPT_PVK_NONE: /* pvk_encr:= 0 */
147 #ifndef OPENSSL_NO_RC4
148 pvk_encr = (o - OPT_PVK_NONE);
149 #endif
150 break;
151 case OPT_NOOUT:
152 noout = 1;
153 break;
154 case OPT_TEXT:
155 text = 1;
156 break;
157 case OPT_MODULUS:
158 modulus = 1;
159 break;
160 case OPT_PUBIN:
161 pubin = 1;
162 break;
163 case OPT_PUBOUT:
164 pubout = 1;
165 break;
166 case OPT_CIPHER:
167 ciphername = opt_unknown();
168 break;
169 case OPT_PROV_CASES:
170 if (!opt_provider(o))
171 goto end;
172 break;
173 }
174 }
175
176 /* No extra args. */
177 if (!opt_check_rest_arg(NULL))
178 goto opthelp;
179
180 if (!opt_cipher(ciphername, &enc))
181 goto end;
182 private = !pubin && (!pubout || text);
183
184 if (!app_passwd(passinarg, passoutarg, &passin, &passout)) {
185 BIO_printf(bio_err, "Error getting passwords\n");
186 goto end;
187 }
188
189 BIO_printf(bio_err, "read DSA key\n");
190 if (pubin)
191 pkey = load_pubkey(infile, informat, 1, passin, e, "public key");
192 else
193 pkey = load_key(infile, informat, 1, passin, e, "private key");
194
195 if (pkey == NULL) {
196 BIO_printf(bio_err, "unable to load Key\n");
197 ERR_print_errors(bio_err);
198 goto end;
199 }
200 if (!EVP_PKEY_is_a(pkey, "DSA")) {
201 BIO_printf(bio_err, "Not a DSA key\n");
202 goto end;
203 }
204
205 out = bio_open_owner(outfile, outformat, private);
206 if (out == NULL)
207 goto end;
208
209 if (text) {
210 assert(pubin || private);
211 if ((pubin && EVP_PKEY_print_public(out, pkey, 0, NULL) <= 0)
212 || (!pubin && EVP_PKEY_print_private(out, pkey, 0, NULL) <= 0)) {
213 perror(outfile);
214 ERR_print_errors(bio_err);
215 goto end;
216 }
217 }
218
219 if (modulus) {
220 BIGNUM *pub_key = NULL;
221
222 if (!EVP_PKEY_get_bn_param(pkey, "pub", &pub_key)) {
223 ERR_print_errors(bio_err);
224 goto end;
225 }
226 BIO_printf(out, "Public Key=");
227 BN_print(out, pub_key);
228 BIO_printf(out, "\n");
229 BN_free(pub_key);
230 }
231
232 if (noout) {
233 ret = 0;
234 goto end;
235 }
236 BIO_printf(bio_err, "writing DSA key\n");
237 if (outformat == FORMAT_ASN1) {
238 output_type = "DER";
239 } else if (outformat == FORMAT_PEM) {
240 output_type = "PEM";
241 } else if (outformat == FORMAT_MSBLOB) {
242 output_type = "MSBLOB";
243 } else if (outformat == FORMAT_PVK) {
244 if (pubin) {
245 BIO_printf(bio_err, "PVK form impossible with public key input\n");
246 goto end;
247 }
248 output_type = "PVK";
249 } else {
250 BIO_printf(bio_err, "bad output format specified for outfile\n");
251 goto end;
252 }
253
254 if (outformat == FORMAT_ASN1 || outformat == FORMAT_PEM) {
255 if (pubout || pubin)
256 output_structure = "SubjectPublicKeyInfo";
257 else
258 output_structure = "type-specific";
259 }
260
261 /* Select what you want in the output */
262 if (pubout || pubin) {
263 selection = OSSL_KEYMGMT_SELECT_PUBLIC_KEY;
264 } else {
265 assert(private);
266 selection = (OSSL_KEYMGMT_SELECT_KEYPAIR
267 | OSSL_KEYMGMT_SELECT_ALL_PARAMETERS);
268 }
269
270 /* Perform the encoding */
271 ectx = OSSL_ENCODER_CTX_new_for_pkey(pkey, selection, output_type,
272 output_structure, NULL);
273 if (OSSL_ENCODER_CTX_get_num_encoders(ectx) == 0) {
274 BIO_printf(bio_err, "%s format not supported\n", output_type);
275 goto end;
276 }
277
278 /* Passphrase setup */
279 if (enc != NULL)
280 OSSL_ENCODER_CTX_set_cipher(ectx, EVP_CIPHER_get0_name(enc), NULL);
281
282 /* Default passphrase prompter */
283 if (enc != NULL || outformat == FORMAT_PVK) {
284 OSSL_ENCODER_CTX_set_passphrase_ui(ectx, get_ui_method(), NULL);
285 if (passout != NULL)
286 /* When passout given, override the passphrase prompter */
287 OSSL_ENCODER_CTX_set_passphrase(ectx,
288 (const unsigned char *)passout,
289 strlen(passout));
290 }
291
292 /* PVK requires a bit more */
293 if (outformat == FORMAT_PVK) {
294 OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
295
296 params[0] = OSSL_PARAM_construct_int("encrypt-level", &pvk_encr);
297 if (!OSSL_ENCODER_CTX_set_params(ectx, params)) {
298 BIO_printf(bio_err, "invalid PVK encryption level\n");
299 goto end;
300 }
301 }
302
303 if (!OSSL_ENCODER_to_bio(ectx, out)) {
304 BIO_printf(bio_err, "unable to write key\n");
305 goto end;
306 }
307 ret = 0;
308 end:
309 if (ret != 0)
310 ERR_print_errors(bio_err);
311 OSSL_ENCODER_CTX_free(ectx);
312 BIO_free_all(out);
313 EVP_PKEY_free(pkey);
314 EVP_CIPHER_free(enc);
315 release_engine(e);
316 OPENSSL_free(passin);
317 OPENSSL_free(passout);
318 return ret;
319 }
320