61 lines
1.7 KiB
C
61 lines
1.7 KiB
C
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/*
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* Copyright 2016-2020 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the Apache License 2.0 (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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#include <openssl/dh.h>
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#include "internal/refcount.h"
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#include "internal/ffc.h"
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#define DH_MIN_MODULUS_BITS 512
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struct dh_st {
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/*
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* This first argument is used to pick up errors when a DH is passed
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* instead of a EVP_PKEY
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*/
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int pad;
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int version;
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FFC_PARAMS params;
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/* max generated private key length (can be less than len(q)) */
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int32_t length;
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BIGNUM *pub_key; /* g^x % p */
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BIGNUM *priv_key; /* x */
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int flags;
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BN_MONT_CTX *method_mont_p;
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CRYPTO_REF_COUNT references;
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#ifndef FIPS_MODULE
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CRYPTO_EX_DATA ex_data;
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ENGINE *engine;
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#endif
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OSSL_LIB_CTX *libctx;
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const DH_METHOD *meth;
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CRYPTO_RWLOCK *lock;
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/* Provider data */
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size_t dirty_cnt; /* If any key material changes, increment this */
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};
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struct dh_method {
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char *name;
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/* Methods here */
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int (*generate_key) (DH *dh);
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int (*compute_key) (unsigned char *key, const BIGNUM *pub_key, DH *dh);
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/* Can be null */
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int (*bn_mod_exp) (const DH *dh, BIGNUM *r, const BIGNUM *a,
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const BIGNUM *p, const BIGNUM *m, BN_CTX *ctx,
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BN_MONT_CTX *m_ctx);
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int (*init) (DH *dh);
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int (*finish) (DH *dh);
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int flags;
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char *app_data;
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/* If this is non-NULL, it will be used to generate parameters */
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int (*generate_params) (DH *dh, int prime_len, int generator,
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BN_GENCB *cb);
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};
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