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Commit | Line | Data |
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aa6bb135 | 1 | /* |
8020d79b | 2 | * Copyright 1995-2021 The OpenSSL Project Authors. All Rights Reserved. |
d02b48c6 | 3 | * |
e38873f5 | 4 | * Licensed under the Apache License 2.0 (the "License"). You may not use |
aa6bb135 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 | ||
ada66e78 P |
10 | /* |
11 | * DH low level APIs are deprecated for public use, but still ok for | |
12 | * internal use. | |
13 | */ | |
14 | #include "internal/deprecated.h" | |
15 | ||
d02b48c6 | 16 | #include <stdio.h> |
ec577822 | 17 | #include <openssl/bn.h> |
3f773c91 TM |
18 | #ifndef FIPS_MODULE |
19 | # include <openssl/engine.h> | |
20 | #endif | |
5a778ce5 | 21 | #include <openssl/obj_mac.h> |
7165593c | 22 | #include <openssl/core_names.h> |
5a778ce5 DG |
23 | #include "internal/cryptlib.h" |
24 | #include "internal/refcount.h" | |
7165593c | 25 | #include "crypto/evp.h" |
dc8de3e6 | 26 | #include "crypto/dh.h" |
5a778ce5 | 27 | #include "dh_local.h" |
d02b48c6 | 28 | |
b4250010 | 29 | static DH *dh_new_intern(ENGINE *engine, OSSL_LIB_CTX *libctx); |
8083fd3a | 30 | |
f844f9eb | 31 | #ifndef FIPS_MODULE |
cb78486d | 32 | int DH_set_method(DH *dh, const DH_METHOD *meth) |
0f113f3e MC |
33 | { |
34 | /* | |
35 | * NB: The caller is specifically setting a method, so it's not up to us | |
36 | * to deal with which ENGINE it comes from. | |
37 | */ | |
38 | const DH_METHOD *mtmp; | |
39 | mtmp = dh->meth; | |
40 | if (mtmp->finish) | |
41 | mtmp->finish(dh); | |
0b13e9f0 | 42 | #ifndef OPENSSL_NO_ENGINE |
7c96dbcd RS |
43 | ENGINE_finish(dh->engine); |
44 | dh->engine = NULL; | |
0b13e9f0 | 45 | #endif |
0f113f3e MC |
46 | dh->meth = meth; |
47 | if (meth->init) | |
48 | meth->init(dh); | |
49 | return 1; | |
50 | } | |
13066cee | 51 | |
19dbb742 | 52 | const DH_METHOD *ossl_dh_get_method(const DH *dh) |
c518117b RL |
53 | { |
54 | return dh->meth; | |
55 | } | |
752419d8 | 56 | # ifndef OPENSSL_NO_DEPRECATED_3_0 |
6b691a5c | 57 | DH *DH_new(void) |
0f113f3e | 58 | { |
8083fd3a | 59 | return dh_new_intern(NULL, NULL); |
0f113f3e | 60 | } |
752419d8 | 61 | # endif |
13066cee | 62 | |
5270e702 | 63 | DH *DH_new_method(ENGINE *engine) |
8083fd3a SL |
64 | { |
65 | return dh_new_intern(engine, NULL); | |
66 | } | |
f844f9eb | 67 | #endif /* !FIPS_MODULE */ |
8083fd3a | 68 | |
19dbb742 | 69 | DH *ossl_dh_new_ex(OSSL_LIB_CTX *libctx) |
8083fd3a SL |
70 | { |
71 | return dh_new_intern(NULL, libctx); | |
72 | } | |
73 | ||
b4250010 | 74 | static DH *dh_new_intern(ENGINE *engine, OSSL_LIB_CTX *libctx) |
0f113f3e | 75 | { |
64b25758 | 76 | DH *ret = OPENSSL_zalloc(sizeof(*ret)); |
13066cee | 77 | |
0f113f3e | 78 | if (ret == NULL) { |
9311d0c4 | 79 | ERR_raise(ERR_LIB_DH, ERR_R_MALLOC_FAILURE); |
d188a536 | 80 | return NULL; |
0f113f3e | 81 | } |
0c9de428 | 82 | |
2bbf0baa F |
83 | ret->references = 1; |
84 | ret->lock = CRYPTO_THREAD_lock_new(); | |
85 | if (ret->lock == NULL) { | |
9311d0c4 | 86 | ERR_raise(ERR_LIB_DH, ERR_R_MALLOC_FAILURE); |
2bbf0baa F |
87 | OPENSSL_free(ret); |
88 | return NULL; | |
89 | } | |
90 | ||
8083fd3a | 91 | ret->libctx = libctx; |
0f113f3e | 92 | ret->meth = DH_get_default_method(); |
f844f9eb | 93 | #if !defined(FIPS_MODULE) && !defined(OPENSSL_NO_ENGINE) |
2bbf0baa | 94 | ret->flags = ret->meth->flags; /* early default init */ |
0f113f3e MC |
95 | if (engine) { |
96 | if (!ENGINE_init(engine)) { | |
9311d0c4 | 97 | ERR_raise(ERR_LIB_DH, ERR_R_ENGINE_LIB); |
2bbf0baa | 98 | goto err; |
0f113f3e MC |
99 | } |
100 | ret->engine = engine; | |
101 | } else | |
102 | ret->engine = ENGINE_get_default_DH(); | |
103 | if (ret->engine) { | |
104 | ret->meth = ENGINE_get_DH(ret->engine); | |
7c96dbcd | 105 | if (ret->meth == NULL) { |
9311d0c4 | 106 | ERR_raise(ERR_LIB_DH, ERR_R_ENGINE_LIB); |
2bbf0baa | 107 | goto err; |
0f113f3e MC |
108 | } |
109 | } | |
0b13e9f0 | 110 | #endif |
cb78486d | 111 | |
0f113f3e | 112 | ret->flags = ret->meth->flags; |
d188a536 | 113 | |
f844f9eb | 114 | #ifndef FIPS_MODULE |
2bbf0baa F |
115 | if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_DH, ret, &ret->ex_data)) |
116 | goto err; | |
f844f9eb | 117 | #endif /* FIPS_MODULE */ |
d188a536 AG |
118 | |
119 | if ((ret->meth->init != NULL) && !ret->meth->init(ret)) { | |
9311d0c4 | 120 | ERR_raise(ERR_LIB_DH, ERR_R_INIT_FAIL); |
544648a8 | 121 | goto err; |
0f113f3e | 122 | } |
d188a536 AG |
123 | |
124 | return ret; | |
544648a8 NT |
125 | |
126 | err: | |
127 | DH_free(ret); | |
128 | return NULL; | |
0f113f3e | 129 | } |
d02b48c6 | 130 | |
6b691a5c | 131 | void DH_free(DH *r) |
0f113f3e MC |
132 | { |
133 | int i; | |
d6407083 | 134 | |
0f113f3e MC |
135 | if (r == NULL) |
136 | return; | |
d188a536 | 137 | |
2f545ae4 | 138 | CRYPTO_DOWN_REF(&r->references, &i, r->lock); |
f3f1cf84 | 139 | REF_PRINT_COUNT("DH", r); |
0f113f3e MC |
140 | if (i > 0) |
141 | return; | |
f3f1cf84 | 142 | REF_ASSERT_ISNT(i < 0); |
13066cee | 143 | |
0c5d725e | 144 | if (r->meth != NULL && r->meth->finish != NULL) |
0f113f3e | 145 | r->meth->finish(r); |
f844f9eb | 146 | #if !defined(FIPS_MODULE) |
62f49b90 | 147 | # if !defined(OPENSSL_NO_ENGINE) |
7c96dbcd | 148 | ENGINE_finish(r->engine); |
62f49b90 | 149 | # endif |
0f113f3e | 150 | CRYPTO_free_ex_data(CRYPTO_EX_INDEX_DH, r, &r->ex_data); |
a3327784 | 151 | #endif |
d50f1bdf | 152 | |
d188a536 AG |
153 | CRYPTO_THREAD_lock_free(r->lock); |
154 | ||
5357c106 | 155 | ossl_ffc_params_cleanup(&r->params); |
23a1d5e9 RS |
156 | BN_clear_free(r->pub_key); |
157 | BN_clear_free(r->priv_key); | |
0f113f3e MC |
158 | OPENSSL_free(r); |
159 | } | |
d02b48c6 | 160 | |
dc2a33d6 | 161 | int DH_up_ref(DH *r) |
0f113f3e | 162 | { |
d188a536 AG |
163 | int i; |
164 | ||
2f545ae4 | 165 | if (CRYPTO_UP_REF(&r->references, &i, r->lock) <= 0) |
d188a536 | 166 | return 0; |
f3f1cf84 RS |
167 | |
168 | REF_PRINT_COUNT("DH", r); | |
169 | REF_ASSERT_ISNT(i < 2); | |
0f113f3e MC |
170 | return ((i > 1) ? 1 : 0); |
171 | } | |
5cbc2e8b | 172 | |
6963979f RL |
173 | void ossl_dh_set0_libctx(DH *d, OSSL_LIB_CTX *libctx) |
174 | { | |
175 | d->libctx = libctx; | |
176 | } | |
177 | ||
f844f9eb | 178 | #ifndef FIPS_MODULE |
dd9d233e | 179 | int DH_set_ex_data(DH *d, int idx, void *arg) |
0f113f3e | 180 | { |
26a7d938 | 181 | return CRYPTO_set_ex_data(&d->ex_data, idx, arg); |
0f113f3e | 182 | } |
13066cee | 183 | |
8cc86b81 | 184 | void *DH_get_ex_data(const DH *d, int idx) |
0f113f3e | 185 | { |
26a7d938 | 186 | return CRYPTO_get_ex_data(&d->ex_data, idx); |
0f113f3e | 187 | } |
a3327784 | 188 | #endif |
13066cee | 189 | |
26c79d56 KR |
190 | int DH_bits(const DH *dh) |
191 | { | |
5d8ffebb SP |
192 | if (dh->params.p != NULL) |
193 | return BN_num_bits(dh->params.p); | |
194 | return -1; | |
26c79d56 KR |
195 | } |
196 | ||
f971ccb2 | 197 | int DH_size(const DH *dh) |
0f113f3e | 198 | { |
5d8ffebb SP |
199 | if (dh->params.p != NULL) |
200 | return BN_num_bytes(dh->params.p); | |
201 | return -1; | |
0f113f3e | 202 | } |
2514fa79 DSH |
203 | |
204 | int DH_security_bits(const DH *dh) | |
0f113f3e MC |
205 | { |
206 | int N; | |
99325852 | 207 | |
dc8de3e6 SL |
208 | if (dh->params.q != NULL) |
209 | N = BN_num_bits(dh->params.q); | |
0f113f3e MC |
210 | else if (dh->length) |
211 | N = dh->length; | |
212 | else | |
213 | N = -1; | |
5d8ffebb SP |
214 | if (dh->params.p != NULL) |
215 | return BN_security_bits(BN_num_bits(dh->params.p), N); | |
216 | return -1; | |
0f113f3e | 217 | } |
0aeddcfa | 218 | |
fd809cfd RL |
219 | void DH_get0_pqg(const DH *dh, |
220 | const BIGNUM **p, const BIGNUM **q, const BIGNUM **g) | |
0aeddcfa | 221 | { |
5357c106 | 222 | ossl_ffc_params_get0_pqg(&dh->params, p, q, g); |
0aeddcfa MC |
223 | } |
224 | ||
225 | int DH_set0_pqg(DH *dh, BIGNUM *p, BIGNUM *q, BIGNUM *g) | |
226 | { | |
738ee181 | 227 | /* |
af9f2ee3 | 228 | * If the fields p and g in dh are NULL, the corresponding input |
1da12e34 | 229 | * parameters MUST be non-NULL. q may remain NULL. |
1da12e34 | 230 | */ |
dc8de3e6 SL |
231 | if ((dh->params.p == NULL && p == NULL) |
232 | || (dh->params.g == NULL && g == NULL)) | |
0aeddcfa | 233 | return 0; |
1da12e34 | 234 | |
5357c106 | 235 | ossl_ffc_params_set0_pqg(&dh->params, p, q, g); |
19dbb742 | 236 | ossl_dh_cache_named_group(dh); |
8b84b075 | 237 | dh->dirty_cnt++; |
0aeddcfa MC |
238 | return 1; |
239 | } | |
240 | ||
241 | long DH_get_length(const DH *dh) | |
242 | { | |
243 | return dh->length; | |
244 | } | |
245 | ||
246 | int DH_set_length(DH *dh, long length) | |
247 | { | |
248 | dh->length = length; | |
ee55a207 | 249 | dh->dirty_cnt++; |
0aeddcfa MC |
250 | return 1; |
251 | } | |
252 | ||
fd809cfd | 253 | void DH_get0_key(const DH *dh, const BIGNUM **pub_key, const BIGNUM **priv_key) |
0aeddcfa MC |
254 | { |
255 | if (pub_key != NULL) | |
256 | *pub_key = dh->pub_key; | |
257 | if (priv_key != NULL) | |
258 | *priv_key = dh->priv_key; | |
259 | } | |
260 | ||
261 | int DH_set0_key(DH *dh, BIGNUM *pub_key, BIGNUM *priv_key) | |
262 | { | |
1da12e34 | 263 | if (pub_key != NULL) { |
fa01370f | 264 | BN_clear_free(dh->pub_key); |
1da12e34 RL |
265 | dh->pub_key = pub_key; |
266 | } | |
267 | if (priv_key != NULL) { | |
fa01370f | 268 | BN_clear_free(dh->priv_key); |
1da12e34 RL |
269 | dh->priv_key = priv_key; |
270 | } | |
0aeddcfa | 271 | |
8b84b075 | 272 | dh->dirty_cnt++; |
0aeddcfa MC |
273 | return 1; |
274 | } | |
275 | ||
6db7fadf DMSP |
276 | const BIGNUM *DH_get0_p(const DH *dh) |
277 | { | |
dc8de3e6 | 278 | return dh->params.p; |
6db7fadf DMSP |
279 | } |
280 | ||
281 | const BIGNUM *DH_get0_q(const DH *dh) | |
282 | { | |
dc8de3e6 | 283 | return dh->params.q; |
6db7fadf DMSP |
284 | } |
285 | ||
286 | const BIGNUM *DH_get0_g(const DH *dh) | |
287 | { | |
dc8de3e6 | 288 | return dh->params.g; |
6db7fadf DMSP |
289 | } |
290 | ||
291 | const BIGNUM *DH_get0_priv_key(const DH *dh) | |
292 | { | |
293 | return dh->priv_key; | |
294 | } | |
295 | ||
296 | const BIGNUM *DH_get0_pub_key(const DH *dh) | |
297 | { | |
298 | return dh->pub_key; | |
299 | } | |
300 | ||
0aeddcfa MC |
301 | void DH_clear_flags(DH *dh, int flags) |
302 | { | |
303 | dh->flags &= ~flags; | |
304 | } | |
305 | ||
306 | int DH_test_flags(const DH *dh, int flags) | |
307 | { | |
308 | return dh->flags & flags; | |
309 | } | |
310 | ||
311 | void DH_set_flags(DH *dh, int flags) | |
312 | { | |
313 | dh->flags |= flags; | |
314 | } | |
315 | ||
f844f9eb | 316 | #ifndef FIPS_MODULE |
0aeddcfa MC |
317 | ENGINE *DH_get0_engine(DH *dh) |
318 | { | |
319 | return dh->engine; | |
320 | } | |
f844f9eb | 321 | #endif /*FIPS_MODULE */ |
dc8de3e6 | 322 | |
19dbb742 | 323 | FFC_PARAMS *ossl_dh_get0_params(DH *dh) |
dc8de3e6 SL |
324 | { |
325 | return &dh->params; | |
326 | } | |
19dbb742 | 327 | int ossl_dh_get0_nid(const DH *dh) |
ca2bf555 SL |
328 | { |
329 | return dh->params.nid; | |
330 | } |