Mirror of BoringSSL (grpc依赖)
https://boringssl.googlesource.com/boringssl
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118 lines
4.9 KiB
118 lines
4.9 KiB
/* ==================================================================== |
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* Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED. |
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* |
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* The Elliptic Curve Public-Key Crypto Library (ECC Code) included |
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* herein is developed by SUN MICROSYSTEMS, INC., and is contributed |
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* to the OpenSSL project. |
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* |
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* The ECC Code is licensed pursuant to the OpenSSL open source |
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* license provided below. |
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* |
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* The ECDH software is originally written by Douglas Stebila of |
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* Sun Microsystems Laboratories. |
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* |
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*/ |
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/* ==================================================================== |
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* Copyright (c) 2000-2002 The OpenSSL Project. All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in |
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* the documentation and/or other materials provided with the |
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* distribution. |
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* |
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* 3. All advertising materials mentioning features or use of this |
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* software must display the following acknowledgment: |
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* "This product includes software developed by the OpenSSL Project |
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* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" |
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* |
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* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to |
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* endorse or promote products derived from this software without |
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* prior written permission. For written permission, please contact |
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* licensing@OpenSSL.org. |
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* |
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* 5. Products derived from this software may not be called "OpenSSL" |
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* nor may "OpenSSL" appear in their names without prior written |
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* permission of the OpenSSL Project. |
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* |
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* 6. Redistributions of any form whatsoever must retain the following |
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* acknowledgment: |
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* "This product includes software developed by the OpenSSL Project |
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* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY |
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* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR |
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
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* OF THE POSSIBILITY OF SUCH DAMAGE. |
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* ==================================================================== |
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* |
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* This product includes cryptographic software written by Eric Young |
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* (eay@cryptsoft.com). This product includes software written by Tim |
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* Hudson (tjh@cryptsoft.com). */ |
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#ifndef OPENSSL_HEADER_ECDH_H |
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#define OPENSSL_HEADER_ECDH_H |
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#include <openssl/base.h> |
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#include <openssl/ec_key.h> |
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#if defined(__cplusplus) |
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extern "C" { |
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#endif |
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// Elliptic curve Diffie-Hellman. |
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// ECDH_compute_key calculates the shared key between |pub_key| and |priv_key|. |
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// If |kdf| is not NULL, then it is called with the bytes of the shared key and |
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// the parameter |out|. When |kdf| returns, the value of |*outlen| becomes the |
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// return value. Otherwise, as many bytes of the shared key as will fit are |
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// copied directly to, at most, |outlen| bytes at |out|. It returns the number |
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// of bytes written to |out|, or -1 on error. |
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OPENSSL_EXPORT int ECDH_compute_key( |
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void *out, size_t outlen, const EC_POINT *pub_key, const EC_KEY *priv_key, |
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void *(*kdf)(const void *in, size_t inlen, void *out, size_t *outlen)); |
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// ECDH_compute_key_fips calculates the shared key between |pub_key| and |
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// |priv_key| and hashes it with the appropriate SHA function for |out_len|. The |
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// only value values for |out_len| are thus 24 (SHA-224), 32 (SHA-256), 48 |
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// (SHA-384), and 64 (SHA-512). It returns one on success and zero on error. |
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// |
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// Note that the return value is different to |ECDH_compute_key|: it returns an |
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// error flag (as is common for BoringSSL) rather than the number of bytes |
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// written. |
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// |
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// This function allows the FIPS module to compute an ECDH and KDF within the |
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// module boundary without taking an arbitrary function pointer for the KDF, |
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// which isn't very FIPSy. |
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OPENSSL_EXPORT int ECDH_compute_key_fips(uint8_t *out, size_t out_len, |
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const EC_POINT *pub_key, |
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const EC_KEY *priv_key); |
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#if defined(__cplusplus) |
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} // extern C |
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#endif |
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#define ECDH_R_KDF_FAILED 100 |
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#define ECDH_R_NO_PRIVATE_VALUE 101 |
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#define ECDH_R_POINT_ARITHMETIC_FAILURE 102 |
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#define ECDH_R_UNKNOWN_DIGEST_LENGTH 103 |
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#endif // OPENSSL_HEADER_ECDH_H
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