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Commit | Line | Data |
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0aeddcfa | 1 | /* |
dc8de3e6 | 2 | * Copyright 2016-2020 The OpenSSL Project Authors. All Rights Reserved. |
0aeddcfa | 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 | |
0aeddcfa | 7 | * https://www.openssl.org/source/license.html |
0aeddcfa MC |
8 | */ |
9 | ||
10 | #include <openssl/dh.h> | |
2f545ae4 | 11 | #include "internal/refcount.h" |
dc8de3e6 | 12 | #include "internal/ffc.h" |
0aeddcfa | 13 | |
6de1fe90 BE |
14 | #define DH_MIN_MODULUS_BITS 512 |
15 | ||
0aeddcfa MC |
16 | struct dh_st { |
17 | /* | |
18 | * This first argument is used to pick up errors when a DH is passed | |
19 | * instead of a EVP_PKEY | |
20 | */ | |
21 | int pad; | |
22 | int version; | |
dc8de3e6 | 23 | FFC_PARAMS params; |
738ee181 SL |
24 | /* max generated private key length (can be less than len(q)) */ |
25 | int32_t length; | |
0aeddcfa MC |
26 | BIGNUM *pub_key; /* g^x % p */ |
27 | BIGNUM *priv_key; /* x */ | |
28 | int flags; | |
29 | BN_MONT_CTX *method_mont_p; | |
2f545ae4 | 30 | CRYPTO_REF_COUNT references; |
f844f9eb | 31 | #ifndef FIPS_MODULE |
0aeddcfa | 32 | CRYPTO_EX_DATA ex_data; |
62f49b90 | 33 | ENGINE *engine; |
a3327784 | 34 | #endif |
8083fd3a | 35 | OPENSSL_CTX *libctx; |
0aeddcfa | 36 | const DH_METHOD *meth; |
0aeddcfa | 37 | CRYPTO_RWLOCK *lock; |
8b84b075 RL |
38 | |
39 | /* Provider data */ | |
40 | size_t dirty_cnt; /* If any key material changes, increment this */ | |
0aeddcfa | 41 | }; |
17e01abb MC |
42 | |
43 | struct dh_method { | |
44 | char *name; | |
45 | /* Methods here */ | |
46 | int (*generate_key) (DH *dh); | |
47 | int (*compute_key) (unsigned char *key, const BIGNUM *pub_key, DH *dh); | |
0263b992 | 48 | |
17e01abb MC |
49 | /* Can be null */ |
50 | int (*bn_mod_exp) (const DH *dh, BIGNUM *r, const BIGNUM *a, | |
51 | const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx, | |
52 | BN_MONT_CTX *m_ctx); | |
53 | int (*init) (DH *dh); | |
54 | int (*finish) (DH *dh); | |
55 | int flags; | |
56 | char *app_data; | |
57 | /* If this is non-NULL, it will be used to generate parameters */ | |
58 | int (*generate_params) (DH *dh, int prime_len, int generator, | |
59 | BN_GENCB *cb); | |
60 | }; | |
9aaecbfc | 61 | |
62 | int dh_buf2key(DH *key, const unsigned char *buf, size_t len); | |
63 | size_t dh_key2buf(const DH *dh, unsigned char **pbuf); |