|  | // Copyright 2019 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_SIPHASH_H | 
|  | #define OPENSSL_HEADER_SIPHASH_H | 
|  |  | 
|  | #include <openssl/base.h>   // IWYU pragma: export | 
|  |  | 
|  | #if defined(__cplusplus) | 
|  | extern "C" { | 
|  | #endif | 
|  |  | 
|  |  | 
|  | // SipHash is a fast, secure PRF that is often used for hash tables. | 
|  |  | 
|  |  | 
|  | // SIPHASH_24 implements SipHash-2-4. See https://131002.net/siphash/siphash.pdf | 
|  | OPENSSL_EXPORT uint64_t SIPHASH_24(const uint64_t key[2], const uint8_t *input, | 
|  | size_t input_len); | 
|  |  | 
|  |  | 
|  | #if defined(__cplusplus) | 
|  | }  // extern C | 
|  | #endif | 
|  |  | 
|  | #endif  // OPENSSL_HEADER_SIPHASH_H |