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git.ipfire.org Git - thirdparty/openssl.git/blob - crypto/dh/dh_lib.c
2 * Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved.
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
11 #include "internal/cryptlib.h"
12 #include "internal/refcount.h"
13 #include <openssl/bn.h>
15 #include <openssl/engine.h>
17 int DH_set_method(DH
*dh
, const DH_METHOD
*meth
)
20 * NB: The caller is specifically setting a method, so it's not up to us
21 * to deal with which ENGINE it comes from.
23 const DH_METHOD
*mtmp
;
27 #ifndef OPENSSL_NO_ENGINE
28 ENGINE_finish(dh
->engine
);
39 return DH_new_method(NULL
);
42 DH
*DH_new_method(ENGINE
*engine
)
44 DH
*ret
= OPENSSL_zalloc(sizeof(*ret
));
47 DHerr(DH_F_DH_NEW_METHOD
, ERR_R_MALLOC_FAILURE
);
52 ret
->lock
= CRYPTO_THREAD_lock_new();
53 if (ret
->lock
== NULL
) {
54 DHerr(DH_F_DH_NEW_METHOD
, ERR_R_MALLOC_FAILURE
);
59 ret
->meth
= DH_get_default_method();
60 #ifndef OPENSSL_NO_ENGINE
61 ret
->flags
= ret
->meth
->flags
; /* early default init */
63 if (!ENGINE_init(engine
)) {
64 DHerr(DH_F_DH_NEW_METHOD
, ERR_R_ENGINE_LIB
);
69 ret
->engine
= ENGINE_get_default_DH();
71 ret
->meth
= ENGINE_get_DH(ret
->engine
);
72 if (ret
->meth
== NULL
) {
73 DHerr(DH_F_DH_NEW_METHOD
, ERR_R_ENGINE_LIB
);
79 ret
->flags
= ret
->meth
->flags
;
81 if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_DH
, ret
, &ret
->ex_data
))
84 if ((ret
->meth
->init
!= NULL
) && !ret
->meth
->init(ret
)) {
85 DHerr(DH_F_DH_NEW_METHOD
, ERR_R_INIT_FAIL
);
103 CRYPTO_DOWN_REF(&r
->references
, &i
, r
->lock
);
104 REF_PRINT_COUNT("DH", r
);
107 REF_ASSERT_ISNT(i
< 0);
109 if (r
->meth
!= NULL
&& r
->meth
->finish
!= NULL
)
111 #ifndef OPENSSL_NO_ENGINE
112 ENGINE_finish(r
->engine
);
115 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_DH
, r
, &r
->ex_data
);
117 CRYPTO_THREAD_lock_free(r
->lock
);
123 OPENSSL_free(r
->seed
);
124 BN_clear_free(r
->counter
);
125 BN_clear_free(r
->pub_key
);
126 BN_clear_free(r
->priv_key
);
134 if (CRYPTO_UP_REF(&r
->references
, &i
, r
->lock
) <= 0)
137 REF_PRINT_COUNT("DH", r
);
138 REF_ASSERT_ISNT(i
< 2);
139 return ((i
> 1) ? 1 : 0);
142 int DH_set_ex_data(DH
*d
, int idx
, void *arg
)
144 return CRYPTO_set_ex_data(&d
->ex_data
, idx
, arg
);
147 void *DH_get_ex_data(DH
*d
, int idx
)
149 return CRYPTO_get_ex_data(&d
->ex_data
, idx
);
152 int DH_bits(const DH
*dh
)
154 return BN_num_bits(dh
->p
);
157 int DH_size(const DH
*dh
)
159 return BN_num_bytes(dh
->p
);
162 int DH_security_bits(const DH
*dh
)
166 N
= BN_num_bits(dh
->q
);
171 return BN_security_bits(BN_num_bits(dh
->p
), N
);
175 void DH_get0_pqg(const DH
*dh
,
176 const BIGNUM
**p
, const BIGNUM
**q
, const BIGNUM
**g
)
186 int DH_set0_pqg(DH
*dh
, BIGNUM
*p
, BIGNUM
*q
, BIGNUM
*g
)
188 /* If the fields p and g in d are NULL, the corresponding input
189 * parameters MUST be non-NULL. q may remain NULL.
191 if ((dh
->p
== NULL
&& p
== NULL
)
192 || (dh
->g
== NULL
&& g
== NULL
))
209 dh
->length
= BN_num_bits(q
);
215 long DH_get_length(const DH
*dh
)
220 int DH_set_length(DH
*dh
, long length
)
226 void DH_get0_key(const DH
*dh
, const BIGNUM
**pub_key
, const BIGNUM
**priv_key
)
229 *pub_key
= dh
->pub_key
;
230 if (priv_key
!= NULL
)
231 *priv_key
= dh
->priv_key
;
234 int DH_set0_key(DH
*dh
, BIGNUM
*pub_key
, BIGNUM
*priv_key
)
236 if (pub_key
!= NULL
) {
237 BN_free(dh
->pub_key
);
238 dh
->pub_key
= pub_key
;
240 if (priv_key
!= NULL
) {
241 BN_free(dh
->priv_key
);
242 dh
->priv_key
= priv_key
;
248 const BIGNUM
*DH_get0_p(const DH
*dh
)
253 const BIGNUM
*DH_get0_q(const DH
*dh
)
258 const BIGNUM
*DH_get0_g(const DH
*dh
)
263 const BIGNUM
*DH_get0_priv_key(const DH
*dh
)
268 const BIGNUM
*DH_get0_pub_key(const DH
*dh
)
273 void DH_clear_flags(DH
*dh
, int flags
)
278 int DH_test_flags(const DH
*dh
, int flags
)
280 return dh
->flags
& flags
;
283 void DH_set_flags(DH
*dh
, int flags
)
288 ENGINE
*DH_get0_engine(DH
*dh
)