| /** @file |
| |
| SHA256 support class. |
| |
| @section license License |
| |
| Licensed to the Apache Software Foundation (ASF) under one |
| or more contributor license agreements. See the NOTICE file |
| distributed with this work for additional information |
| regarding copyright ownership. The ASF licenses this file |
| to you 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 |
| |
| http://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. |
| */ |
| |
| #pragma once |
| |
| #include "tscore/ink_defs.h" |
| #include "tscore/CryptoHash.h" |
| #if HAVE_SHA256_INIT |
| #include <openssl/sha.h> |
| #else |
| #include <openssl/evp.h> |
| #endif |
| |
| class SHA256Context : public ts::CryptoContext::Hasher |
| { |
| public: |
| SHA256Context() |
| { |
| #if HAVE_SHA256_INIT |
| #pragma GCC diagnostic push |
| #pragma GCC diagnostic ignored "-Wdeprecated-declarations" |
| SHA256_Init(&_sha256ctx); |
| #pragma GCC diagnostic pop |
| #else |
| _ctx = EVP_MD_CTX_new(); |
| EVP_DigestInit_ex(_ctx, EVP_sha256(), nullptr); |
| #endif |
| } |
| ~SHA256Context() override |
| { |
| #if HAVE_SHA256_INIT |
| // _sha256ctx does not need to be freed |
| #else |
| EVP_MD_CTX_free(_ctx); |
| #endif |
| } |
| /// Update the hash with @a data of @a length bytes. |
| bool |
| update(void const *data, int length) override |
| { |
| #if HAVE_SHA256_INIT |
| #pragma GCC diagnostic push |
| #pragma GCC diagnostic ignored "-Wdeprecated-declarations" |
| return SHA256_Update(&_sha256ctx, data, length); |
| #pragma GCC diagnostic pop |
| #else |
| return EVP_DigestUpdate(_ctx, data, length); |
| #endif |
| } |
| /// Finalize and extract the @a hash. |
| bool |
| finalize(CryptoHash &hash) override |
| { |
| #if HAVE_SHA256_INIT |
| #pragma GCC diagnostic push |
| #pragma GCC diagnostic ignored "-Wdeprecated-declarations" |
| return SHA256_Final(hash.u8, &_sha256ctx); |
| #pragma GCC diagnostic pop |
| #else |
| return EVP_DigestFinal_ex(_ctx, hash.u8, nullptr); |
| #endif |
| } |
| #if HAVE_SHA256_INIT |
| private: |
| SHA256_CTX _sha256ctx; |
| #endif |
| }; |