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1 /*
2  * Copyright 2020-2022 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 #ifndef OSSL_CRYPTO_DH_H
11 # define OSSL_CRYPTO_DH_H
12 # pragma once
13 
14 # include <openssl/core.h>
15 # include <openssl/params.h>
16 # include <openssl/dh.h>
17 # include "internal/ffc.h"
18 
19 DH *ossl_dh_new_by_nid_ex(OSSL_LIB_CTX *libctx, int nid);
20 DH *ossl_dh_new_ex(OSSL_LIB_CTX *libctx);
21 void ossl_dh_set0_libctx(DH *d, OSSL_LIB_CTX *libctx);
22 int ossl_dh_generate_ffc_parameters(DH *dh, int type, int pbits, int qbits,
23                                     BN_GENCB *cb);
24 int ossl_dh_generate_public_key(BN_CTX *ctx, const DH *dh,
25                                 const BIGNUM *priv_key, BIGNUM *pub_key);
26 int ossl_dh_get_named_group_uid_from_size(int pbits);
27 const char *ossl_dh_gen_type_id2name(int id);
28 int ossl_dh_gen_type_name2id(const char *name, int type);
29 void ossl_dh_cache_named_group(DH *dh);
30 int ossl_dh_is_named_safe_prime_group(const DH *dh);
31 
32 FFC_PARAMS *ossl_dh_get0_params(DH *dh);
33 int ossl_dh_get0_nid(const DH *dh);
34 int ossl_dh_params_fromdata(DH *dh, const OSSL_PARAM params[]);
35 int ossl_dh_key_fromdata(DH *dh, const OSSL_PARAM params[], int include_private);
36 int ossl_dh_params_todata(DH *dh, OSSL_PARAM_BLD *bld, OSSL_PARAM params[]);
37 int ossl_dh_key_todata(DH *dh, OSSL_PARAM_BLD *bld, OSSL_PARAM params[],
38                        int include_private);
39 DH *ossl_dh_key_from_pkcs8(const PKCS8_PRIV_KEY_INFO *p8inf,
40                            OSSL_LIB_CTX *libctx, const char *propq);
41 int ossl_dh_compute_key(unsigned char *key, const BIGNUM *pub_key, DH *dh);
42 
43 int ossl_dh_check_pub_key_partial(const DH *dh, const BIGNUM *pub_key, int *ret);
44 int ossl_dh_check_priv_key(const DH *dh, const BIGNUM *priv_key, int *ret);
45 int ossl_dh_check_pairwise(const DH *dh);
46 
47 const DH_METHOD *ossl_dh_get_method(const DH *dh);
48 
49 int ossl_dh_buf2key(DH *key, const unsigned char *buf, size_t len);
50 size_t ossl_dh_key2buf(const DH *dh, unsigned char **pbuf, size_t size,
51                        int alloc);
52 
53 int ossl_dh_kdf_X9_42_asn1(unsigned char *out, size_t outlen,
54                            const unsigned char *Z, size_t Zlen,
55                            const char *cek_alg,
56                            const unsigned char *ukm, size_t ukmlen,
57                            const EVP_MD *md,
58                            OSSL_LIB_CTX *libctx, const char *propq);
59 int ossl_dh_is_foreign(const DH *dh);
60 DH *ossl_dh_dup(const DH *dh, int selection);
61 
62 #endif  /* OSSL_CRYPTO_DH_H */
63