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// Copyright 2022 The BoringSSL Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef OPENSSL_HEADER_CRYPTO_FIPSMODULE_DH_INTERNAL_H
#define OPENSSL_HEADER_CRYPTO_FIPSMODULE_DH_INTERNAL_H
#include <openssl/base.h>
#include <openssl/thread.h>
#include "../../internal.h"
#if defined(__cplusplus)
extern "C" {
#endif
struct dh_st {
BIGNUM *p;
BIGNUM *g;
BIGNUM *q;
BIGNUM *pub_key; // g^x mod p
BIGNUM *priv_key; // x
// priv_length contains the length, in bits, of the private value. If zero,
// the private value will be the same length as |p|.
unsigned priv_length;
CRYPTO_MUTEX method_mont_p_lock;
BN_MONT_CTX *method_mont_p;
int flags;
CRYPTO_refcount_t references;
};
// dh_check_params_fast checks basic invariants on |dh|'s domain parameters. It
// does not check that |dh| forms a valid group, only that the sizes are within
// DoS bounds.
int dh_check_params_fast(const DH *dh);
// dh_compute_key_padded_no_self_test does the same as |DH_compute_key_padded|,
// but doesn't try to run the self-test first. This is for use in the self tests
// themselves, to prevent an infinite loop.
int dh_compute_key_padded_no_self_test(unsigned char *out,
const BIGNUM *peers_key, DH *dh);
#if defined(__cplusplus)
}
#endif
#endif // OPENSSL_HEADER_CRYPTO_FIPSMODULE_DH_INTERNAL_H