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d2e9e320 | 1 | /* |
4333b89f | 2 | * Copyright 1995-2021 The OpenSSL Project Authors. All Rights Reserved. |
d02b48c6 | 3 | * |
3cdbea65 | 4 | * Licensed under the Apache License 2.0 (the "License"). You may not use |
d2e9e320 RS |
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 | |
d02b48c6 RE |
8 | */ |
9 | ||
f41ac0ee P |
10 | /* |
11 | * DSA low level APIs are deprecated for public use, but still ok for | |
12 | * internal use. | |
13 | */ | |
14 | #include "internal/deprecated.h" | |
15 | ||
ec577822 | 16 | #include <openssl/bn.h> |
3f773c91 TM |
17 | #ifndef FIPS_MODULE |
18 | # include <openssl/engine.h> | |
19 | #endif | |
53cefef6 TM |
20 | #include "internal/cryptlib.h" |
21 | #include "internal/refcount.h" | |
e683582b | 22 | #include "crypto/dsa.h" |
dc8de3e6 | 23 | #include "crypto/dh.h" /* required by DSA_dup_DH() */ |
53cefef6 | 24 | #include "dsa_local.h" |
e683582b | 25 | |
b4250010 | 26 | static DSA *dsa_new_intern(ENGINE *engine, OSSL_LIB_CTX *libctx); |
8083fd3a | 27 | |
f844f9eb | 28 | #ifndef FIPS_MODULE |
d02b48c6 | 29 | |
e683582b SL |
30 | int DSA_set_ex_data(DSA *d, int idx, void *arg) |
31 | { | |
32 | return CRYPTO_set_ex_data(&d->ex_data, idx, arg); | |
33 | } | |
34 | ||
8cc86b81 | 35 | void *DSA_get_ex_data(const DSA *d, int idx) |
e683582b SL |
36 | { |
37 | return CRYPTO_get_ex_data(&d->ex_data, idx); | |
38 | } | |
39 | ||
dc8de3e6 | 40 | # ifndef OPENSSL_NO_DH |
e683582b SL |
41 | DH *DSA_dup_DH(const DSA *r) |
42 | { | |
43 | /* | |
dc8de3e6 SL |
44 | * DSA has p, q, g, optional pub_key, optional priv_key. |
45 | * DH has p, optional length, g, optional pub_key, | |
46 | * optional priv_key, optional q. | |
e683582b | 47 | */ |
e683582b | 48 | DH *ret = NULL; |
dc8de3e6 | 49 | BIGNUM *pub_key = NULL, *priv_key = NULL; |
e683582b SL |
50 | |
51 | if (r == NULL) | |
52 | goto err; | |
53 | ret = DH_new(); | |
54 | if (ret == NULL) | |
55 | goto err; | |
dc8de3e6 | 56 | |
19dbb742 | 57 | if (!ossl_ffc_params_copy(ossl_dh_get0_params(ret), &r->params)) |
dc8de3e6 | 58 | goto err; |
e683582b SL |
59 | |
60 | if (r->pub_key != NULL) { | |
61 | pub_key = BN_dup(r->pub_key); | |
62 | if (pub_key == NULL) | |
63 | goto err; | |
64 | if (r->priv_key != NULL) { | |
65 | priv_key = BN_dup(r->priv_key); | |
66 | if (priv_key == NULL) | |
67 | goto err; | |
68 | } | |
69 | if (!DH_set0_key(ret, pub_key, priv_key)) | |
70 | goto err; | |
71 | } else if (r->priv_key != NULL) { | |
72 | /* Shouldn't happen */ | |
73 | goto err; | |
74 | } | |
75 | ||
76 | return ret; | |
77 | ||
78 | err: | |
e683582b SL |
79 | BN_free(pub_key); |
80 | BN_free(priv_key); | |
81 | DH_free(ret); | |
82 | return NULL; | |
83 | } | |
dc8de3e6 | 84 | # endif /* OPENSSL_NO_DH */ |
e683582b | 85 | |
e683582b SL |
86 | void DSA_clear_flags(DSA *d, int flags) |
87 | { | |
88 | d->flags &= ~flags; | |
89 | } | |
90 | ||
91 | int DSA_test_flags(const DSA *d, int flags) | |
92 | { | |
93 | return d->flags & flags; | |
94 | } | |
95 | ||
96 | void DSA_set_flags(DSA *d, int flags) | |
97 | { | |
98 | d->flags |= flags; | |
99 | } | |
100 | ||
101 | ENGINE *DSA_get0_engine(DSA *d) | |
102 | { | |
103 | return d->engine; | |
104 | } | |
105 | ||
cb78486d | 106 | int DSA_set_method(DSA *dsa, const DSA_METHOD *meth) |
0f113f3e MC |
107 | { |
108 | /* | |
109 | * NB: The caller is specifically setting a method, so it's not up to us | |
110 | * to deal with which ENGINE it comes from. | |
111 | */ | |
112 | const DSA_METHOD *mtmp; | |
113 | mtmp = dsa->meth; | |
114 | if (mtmp->finish) | |
115 | mtmp->finish(dsa); | |
0b13e9f0 | 116 | #ifndef OPENSSL_NO_ENGINE |
7c96dbcd RS |
117 | ENGINE_finish(dsa->engine); |
118 | dsa->engine = NULL; | |
0b13e9f0 | 119 | #endif |
0f113f3e MC |
120 | dsa->meth = meth; |
121 | if (meth->init) | |
122 | meth->init(dsa); | |
123 | return 1; | |
124 | } | |
f844f9eb | 125 | #endif /* FIPS_MODULE */ |
e683582b | 126 | |
c0711f7f | 127 | |
6e9fa57c MC |
128 | const DSA_METHOD *DSA_get_method(DSA *d) |
129 | { | |
130 | return d->meth; | |
131 | } | |
132 | ||
b4250010 | 133 | static DSA *dsa_new_intern(ENGINE *engine, OSSL_LIB_CTX *libctx) |
0f113f3e | 134 | { |
2bbf0baa | 135 | DSA *ret = OPENSSL_zalloc(sizeof(*ret)); |
0f113f3e | 136 | |
e077455e | 137 | if (ret == NULL) |
d188a536 | 138 | return NULL; |
2bbf0baa F |
139 | |
140 | ret->references = 1; | |
141 | ret->lock = CRYPTO_THREAD_lock_new(); | |
142 | if (ret->lock == NULL) { | |
e077455e | 143 | ERR_raise(ERR_LIB_DSA, ERR_R_CRYPTO_LIB); |
2bbf0baa F |
144 | OPENSSL_free(ret); |
145 | return NULL; | |
146 | } | |
147 | ||
8083fd3a | 148 | ret->libctx = libctx; |
0f113f3e | 149 | ret->meth = DSA_get_default_method(); |
f844f9eb | 150 | #if !defined(FIPS_MODULE) && !defined(OPENSSL_NO_ENGINE) |
2bbf0baa | 151 | ret->flags = ret->meth->flags & ~DSA_FLAG_NON_FIPS_ALLOW; /* early default init */ |
0f113f3e MC |
152 | if (engine) { |
153 | if (!ENGINE_init(engine)) { | |
9311d0c4 | 154 | ERR_raise(ERR_LIB_DSA, ERR_R_ENGINE_LIB); |
2bbf0baa | 155 | goto err; |
0f113f3e MC |
156 | } |
157 | ret->engine = engine; | |
158 | } else | |
159 | ret->engine = ENGINE_get_default_DSA(); | |
160 | if (ret->engine) { | |
161 | ret->meth = ENGINE_get_DSA(ret->engine); | |
7c96dbcd | 162 | if (ret->meth == NULL) { |
9311d0c4 | 163 | ERR_raise(ERR_LIB_DSA, ERR_R_ENGINE_LIB); |
2bbf0baa | 164 | goto err; |
0f113f3e MC |
165 | } |
166 | } | |
0b13e9f0 | 167 | #endif |
0c9de428 | 168 | |
0f113f3e | 169 | ret->flags = ret->meth->flags & ~DSA_FLAG_NON_FIPS_ALLOW; |
d188a536 | 170 | |
f844f9eb | 171 | #ifndef FIPS_MODULE |
e4bec869 SL |
172 | if (!ossl_crypto_new_ex_data_ex(libctx, CRYPTO_EX_INDEX_DSA, ret, |
173 | &ret->ex_data)) | |
2bbf0baa | 174 | goto err; |
a3327784 | 175 | #endif |
d188a536 AG |
176 | |
177 | if ((ret->meth->init != NULL) && !ret->meth->init(ret)) { | |
9311d0c4 | 178 | ERR_raise(ERR_LIB_DSA, ERR_R_INIT_FAIL); |
544648a8 | 179 | goto err; |
0f113f3e MC |
180 | } |
181 | ||
d188a536 | 182 | return ret; |
544648a8 NT |
183 | |
184 | err: | |
185 | DSA_free(ret); | |
186 | return NULL; | |
0f113f3e | 187 | } |
d02b48c6 | 188 | |
e683582b SL |
189 | DSA *DSA_new_method(ENGINE *engine) |
190 | { | |
8083fd3a SL |
191 | return dsa_new_intern(engine, NULL); |
192 | } | |
193 | ||
5af02212 | 194 | DSA *ossl_dsa_new(OSSL_LIB_CTX *libctx) |
8083fd3a SL |
195 | { |
196 | return dsa_new_intern(NULL, libctx); | |
e683582b SL |
197 | } |
198 | ||
f844f9eb | 199 | #ifndef FIPS_MODULE |
a3327784 | 200 | DSA *DSA_new(void) |
e683582b | 201 | { |
8083fd3a | 202 | return dsa_new_intern(NULL, NULL); |
e683582b | 203 | } |
8083fd3a | 204 | #endif |
e683582b | 205 | |
6b691a5c | 206 | void DSA_free(DSA *r) |
0f113f3e MC |
207 | { |
208 | int i; | |
d02b48c6 | 209 | |
0f113f3e MC |
210 | if (r == NULL) |
211 | return; | |
d02b48c6 | 212 | |
2f545ae4 | 213 | CRYPTO_DOWN_REF(&r->references, &i, r->lock); |
f3f1cf84 | 214 | REF_PRINT_COUNT("DSA", r); |
0f113f3e MC |
215 | if (i > 0) |
216 | return; | |
f3f1cf84 | 217 | REF_ASSERT_ISNT(i < 0); |
d02b48c6 | 218 | |
0c5d725e | 219 | if (r->meth != NULL && r->meth->finish != NULL) |
0f113f3e | 220 | r->meth->finish(r); |
f844f9eb | 221 | #if !defined(FIPS_MODULE) && !defined(OPENSSL_NO_ENGINE) |
17fa4e8e | 222 | ENGINE_finish(r->engine); |
0b13e9f0 | 223 | #endif |
c0711f7f | 224 | |
f844f9eb | 225 | #ifndef FIPS_MODULE |
0f113f3e | 226 | CRYPTO_free_ex_data(CRYPTO_EX_INDEX_DSA, r, &r->ex_data); |
a3327784 | 227 | #endif |
0f113f3e | 228 | |
d188a536 AG |
229 | CRYPTO_THREAD_lock_free(r->lock); |
230 | ||
5357c106 | 231 | ossl_ffc_params_cleanup(&r->params); |
23a1d5e9 RS |
232 | BN_clear_free(r->pub_key); |
233 | BN_clear_free(r->priv_key); | |
0f113f3e MC |
234 | OPENSSL_free(r); |
235 | } | |
d02b48c6 | 236 | |
6ac4e8bd | 237 | int DSA_up_ref(DSA *r) |
0f113f3e | 238 | { |
d188a536 AG |
239 | int i; |
240 | ||
2f545ae4 | 241 | if (CRYPTO_UP_REF(&r->references, &i, r->lock) <= 0) |
d188a536 | 242 | return 0; |
f3f1cf84 RS |
243 | |
244 | REF_PRINT_COUNT("DSA", r); | |
245 | REF_ASSERT_ISNT(i < 2); | |
0f113f3e MC |
246 | return ((i > 1) ? 1 : 0); |
247 | } | |
5cbc2e8b | 248 | |
6963979f RL |
249 | void ossl_dsa_set0_libctx(DSA *d, OSSL_LIB_CTX *libctx) |
250 | { | |
251 | d->libctx = libctx; | |
252 | } | |
253 | ||
fd809cfd RL |
254 | void DSA_get0_pqg(const DSA *d, |
255 | const BIGNUM **p, const BIGNUM **q, const BIGNUM **g) | |
1258396d | 256 | { |
5357c106 | 257 | ossl_ffc_params_get0_pqg(&d->params, p, q, g); |
1258396d MC |
258 | } |
259 | ||
260 | int DSA_set0_pqg(DSA *d, BIGNUM *p, BIGNUM *q, BIGNUM *g) | |
261 | { | |
fd809cfd | 262 | /* If the fields p, q and g in d are NULL, the corresponding input |
1da12e34 | 263 | * parameters MUST be non-NULL. |
1da12e34 | 264 | */ |
dc8de3e6 SL |
265 | if ((d->params.p == NULL && p == NULL) |
266 | || (d->params.q == NULL && q == NULL) | |
267 | || (d->params.g == NULL && g == NULL)) | |
1258396d | 268 | return 0; |
1da12e34 | 269 | |
5357c106 | 270 | ossl_ffc_params_set0_pqg(&d->params, p, q, g); |
4889dadc | 271 | d->dirty_cnt++; |
1258396d MC |
272 | |
273 | return 1; | |
274 | } | |
275 | ||
b305452f RL |
276 | const BIGNUM *DSA_get0_p(const DSA *d) |
277 | { | |
278 | return d->params.p; | |
279 | } | |
280 | ||
281 | const BIGNUM *DSA_get0_q(const DSA *d) | |
282 | { | |
283 | return d->params.q; | |
284 | } | |
285 | ||
286 | const BIGNUM *DSA_get0_g(const DSA *d) | |
287 | { | |
288 | return d->params.g; | |
289 | } | |
290 | ||
291 | const BIGNUM *DSA_get0_pub_key(const DSA *d) | |
292 | { | |
293 | return d->pub_key; | |
294 | } | |
295 | ||
296 | const BIGNUM *DSA_get0_priv_key(const DSA *d) | |
297 | { | |
298 | return d->priv_key; | |
299 | } | |
300 | ||
fd809cfd RL |
301 | void DSA_get0_key(const DSA *d, |
302 | const BIGNUM **pub_key, const BIGNUM **priv_key) | |
1258396d | 303 | { |
6e9fa57c MC |
304 | if (pub_key != NULL) |
305 | *pub_key = d->pub_key; | |
306 | if (priv_key != NULL) | |
307 | *priv_key = d->priv_key; | |
1258396d MC |
308 | } |
309 | ||
6e9fa57c | 310 | int DSA_set0_key(DSA *d, BIGNUM *pub_key, BIGNUM *priv_key) |
1258396d | 311 | { |
1da12e34 RL |
312 | if (pub_key != NULL) { |
313 | BN_free(d->pub_key); | |
314 | d->pub_key = pub_key; | |
315 | } | |
316 | if (priv_key != NULL) { | |
317 | BN_free(d->priv_key); | |
318 | d->priv_key = priv_key; | |
319 | } | |
4889dadc | 320 | d->dirty_cnt++; |
1258396d MC |
321 | |
322 | return 1; | |
323 | } | |
324 | ||
806253f3 RL |
325 | int DSA_security_bits(const DSA *d) |
326 | { | |
dc8de3e6 SL |
327 | if (d->params.p != NULL && d->params.q != NULL) |
328 | return BN_security_bits(BN_num_bits(d->params.p), | |
329 | BN_num_bits(d->params.q)); | |
806253f3 RL |
330 | return -1; |
331 | } | |
332 | ||
333 | int DSA_bits(const DSA *dsa) | |
334 | { | |
ecfbe2f0 RL |
335 | if (dsa->params.p != NULL) |
336 | return BN_num_bits(dsa->params.p); | |
337 | return -1; | |
806253f3 | 338 | } |
2888fc15 | 339 | |
5af02212 | 340 | FFC_PARAMS *ossl_dsa_get0_params(DSA *dsa) |
2888fc15 RL |
341 | { |
342 | return &dsa->params; | |
343 | } | |
b03ec3b5 | 344 | |
5af02212 | 345 | int ossl_dsa_ffc_params_fromdata(DSA *dsa, const OSSL_PARAM params[]) |
b03ec3b5 SL |
346 | { |
347 | int ret; | |
348 | FFC_PARAMS *ffc; | |
349 | ||
350 | if (dsa == NULL) | |
351 | return 0; | |
5af02212 | 352 | ffc = ossl_dsa_get0_params(dsa); |
b03ec3b5 SL |
353 | if (ffc == NULL) |
354 | return 0; | |
355 | ||
5357c106 | 356 | ret = ossl_ffc_params_fromdata(ffc, params); |
b03ec3b5 SL |
357 | if (ret) |
358 | dsa->dirty_cnt++; | |
359 | return ret; | |
360 | } |