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Simple HTTP client with HTTP/1.1, HTTP/2, and HTTP/3 support

Retired package: Release invalid - Use 3.0.1 instead
Security advisory: This version has known vulnerabilities. View advisories
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hackney c_src boringssl include openssl ecdh.h
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c_src/boringssl/include/openssl/ecdh.h 

// Copyright 2002-2016 The OpenSSL Project Authors. All Rights Reserved.

// Copyright (c) 2002, Oracle and/or its affiliates. All rights reserved.

//

// 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_ECDH_H

#define OPENSSL_HEADER_ECDH_H



#include <openssl/base.h>   // IWYU pragma: export



#include <openssl/ec_key.h>



#if defined(__cplusplus)

extern "C" {

#endif





// Elliptic curve Diffie-Hellman.





// ECDH_compute_key calculates the shared key between |pub_key| and |priv_key|.

// If |kdf| is not NULL, then it is called with the bytes of the shared key and

// the parameter |out|. When |kdf| returns, the value of |*outlen| becomes the

// return value. Otherwise, as many bytes of the shared key as will fit are

// copied directly to, at most, |outlen| bytes at |out|. It returns the number

// of bytes written to |out|, or -1 on error.

OPENSSL_EXPORT int ECDH_compute_key(

    void *out, size_t outlen, const EC_POINT *pub_key, const EC_KEY *priv_key,

    void *(*kdf)(const void *in, size_t inlen, void *out, size_t *outlen));



// ECDH_compute_key_fips calculates the shared key between |pub_key| and

// |priv_key| and hashes it with the appropriate SHA function for |out_len|. The

// only value values for |out_len| are thus 24 (SHA-224), 32 (SHA-256), 48

// (SHA-384), and 64 (SHA-512). It returns one on success and zero on error.

//

// Note that the return value is different to |ECDH_compute_key|: it returns an

// error flag (as is common for BoringSSL) rather than the number of bytes

// written.

//

// This function allows the FIPS module to compute an ECDH and KDF within the

// module boundary without taking an arbitrary function pointer for the KDF,

// which isn't very FIPSy.

OPENSSL_EXPORT int ECDH_compute_key_fips(uint8_t *out, size_t out_len,

                                         const EC_POINT *pub_key,

                                         const EC_KEY *priv_key);





#if defined(__cplusplus)

}  // extern C

#endif



#define ECDH_R_KDF_FAILED 100

#define ECDH_R_NO_PRIVATE_VALUE 101

#define ECDH_R_POINT_ARITHMETIC_FAILURE 102

#define ECDH_R_UNKNOWN_DIGEST_LENGTH 103



#endif  // OPENSSL_HEADER_ECDH_H