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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 <contrib/restricted/google/boringssl/include/openssl/base.h>
#include "../../internal.h"
#include "../../mem_internal.h"
DECLARE_OPAQUE_STRUCT(dh_st, DHImpl)
BSSL_NAMESPACE_BEGIN
class DHImpl : public dh_st, public RefCounted<DHImpl> {
public:
DHImpl() : RefCounted(CheckSubClass()) {}
UniquePtr<BIGNUM> p;
UniquePtr<BIGNUM> g;
UniquePtr<BIGNUM> q;
UniquePtr<BIGNUM> pub_key; // g^x mod p
UniquePtr<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 = 0;
mutable Mutex method_mont_p_lock;
mutable UniquePtr<BN_MONT_CTX> method_mont_p;
private:
friend RefCounted;
~DHImpl() = default;
};
// 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);
BSSL_NAMESPACE_END
#endif // OPENSSL_HEADER_CRYPTO_FIPSMODULE_DH_INTERNAL_H
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