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94 lines
2.6 KiB
C++
94 lines
2.6 KiB
C++
//
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// DigestEngine.cpp
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//
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// $Id: //poco/1.4/Crypto/src/DigestEngine.cpp#1 $
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//
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// Library: Crypto
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// Package: Digest
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// Module: DigestEngine
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//
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// Copyright (c) 2012, Applied Informatics Software Engineering GmbH.
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// and Contributors.
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//
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// Permission is hereby granted, free of charge, to any person or organization
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// obtaining a copy of the software and accompanying documentation covered by
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// this license (the "Software") to use, reproduce, display, distribute,
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// execute, and transmit the Software, and to prepare derivative works of the
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// Software, and to permit third-parties to whom the Software is furnished to
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// do so, all subject to the following:
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//
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// The copyright notices in the Software and this entire statement, including
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// the above license grant, this restriction and the following disclaimer,
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// must be included in all copies of the Software, in whole or in part, and
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// all derivative works of the Software, unless such copies or derivative
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// works are solely in the form of machine-executable object code generated by
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// a source language processor.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
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// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
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// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
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// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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// DEALINGS IN THE SOFTWARE.
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//
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#include "Poco/Crypto/DigestEngine.h"
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#include "Poco/Exception.h"
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namespace Poco {
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namespace Crypto {
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DigestEngine::DigestEngine(const std::string& name):
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_name(name)
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{
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const EVP_MD* md = EVP_get_digestbyname(_name.c_str());
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if (!md) throw Poco::NotFoundException(_name);
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_ctx = EVP_MD_CTX_create();
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EVP_DigestInit_ex(_ctx, md, NULL);
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}
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DigestEngine::~DigestEngine()
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{
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EVP_MD_CTX_destroy(_ctx);
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}
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std::size_t DigestEngine::digestLength() const
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{
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return EVP_MD_CTX_size(_ctx);
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}
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void DigestEngine::reset()
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{
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EVP_MD_CTX_cleanup(_ctx);
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const EVP_MD* md = EVP_get_digestbyname(_name.c_str());
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if (!md) throw Poco::NotFoundException(_name);
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EVP_DigestInit_ex(_ctx, md, NULL);
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}
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const Poco::DigestEngine::Digest& DigestEngine::digest()
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{
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_digest.clear();
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unsigned len = EVP_MD_CTX_size(_ctx);
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_digest.resize(len);
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EVP_DigestFinal_ex(_ctx, &_digest[0], &len);
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reset();
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return _digest;
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}
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void DigestEngine::updateImpl(const void* data, unsigned length)
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{
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EVP_DigestUpdate(_ctx, data, length);
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}
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} } // namespace Poco::Crypto
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