158 lines
4.4 KiB
C++
158 lines
4.4 KiB
C++
/*
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Copyright (c) 2003-2018, Arvid Norberg
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All rights reserved.
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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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* 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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* 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 distribution.
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* Neither the name of the author nor the names of its
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contributors may be used to endorse or promote products derived
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from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, 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 OF THE
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POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "libtorrent/hasher.hpp"
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#include "libtorrent/error_code.hpp"
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#include "libtorrent/assert.hpp"
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#include "libtorrent/aux_/openssl.hpp"
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namespace libtorrent {
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#ifdef TORRENT_MACOS_DEPRECATED_LIBCRYPTO
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#pragma clang diagnostic push
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#pragma clang diagnostic ignored "-Wdeprecated-declarations"
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#endif
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hasher::hasher()
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{
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#ifdef TORRENT_USE_LIBGCRYPT
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gcry_md_open(&m_context, GCRY_MD_SHA1, 0);
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#elif TORRENT_USE_COMMONCRYPTO
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CC_SHA1_Init(&m_context);
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#elif TORRENT_USE_CRYPTOAPI
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#elif defined TORRENT_USE_LIBCRYPTO
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SHA1_Init(&m_context);
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#else
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SHA1_init(&m_context);
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#endif
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}
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hasher::hasher(span<char const> data)
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: hasher()
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{
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update(data);
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}
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hasher::hasher(char const* data, int len)
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: hasher()
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{
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TORRENT_ASSERT(len > 0);
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update({data, len});
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}
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#ifdef TORRENT_USE_LIBGCRYPT
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hasher::hasher(hasher const& h)
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{
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gcry_md_copy(&m_context, h.m_context);
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}
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hasher& hasher::operator=(hasher const& h) &
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{
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if (this == &h) return *this;
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gcry_md_close(m_context);
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gcry_md_copy(&m_context, h.m_context);
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return *this;
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}
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#else
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hasher::hasher(hasher const&) = default;
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hasher& hasher::operator=(hasher const&) & = default;
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#endif
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hasher& hasher::update(char const* data, int len)
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{
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return update({data, len});
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}
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hasher& hasher::update(span<char const> data)
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{
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TORRENT_ASSERT(data.size() > 0);
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#ifdef TORRENT_USE_LIBGCRYPT
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gcry_md_write(m_context, data.data(), static_cast<std::size_t>(data.size()));
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#elif TORRENT_USE_COMMONCRYPTO
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CC_SHA1_Update(&m_context, reinterpret_cast<unsigned char const*>(data.data()), CC_LONG(data.size()));
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#elif TORRENT_USE_CRYPTOAPI
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m_context.update(data);
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#elif defined TORRENT_USE_LIBCRYPTO
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SHA1_Update(&m_context, reinterpret_cast<unsigned char const*>(data.data())
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, static_cast<std::size_t>(data.size()));
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#else
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SHA1_update(&m_context, reinterpret_cast<unsigned char const*>(data.data())
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, static_cast<std::size_t>(data.size()));
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#endif
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return *this;
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}
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sha1_hash hasher::final()
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{
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sha1_hash digest;
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#ifdef TORRENT_USE_LIBGCRYPT
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gcry_md_final(m_context);
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digest.assign(reinterpret_cast<char const*>(gcry_md_read(m_context, 0)));
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#elif TORRENT_USE_COMMONCRYPTO
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CC_SHA1_Final(reinterpret_cast<unsigned char*>(digest.data()), &m_context);
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#elif TORRENT_USE_CRYPTOAPI
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m_context.get_hash(digest.data(), digest.size());
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#elif defined TORRENT_USE_LIBCRYPTO
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SHA1_Final(reinterpret_cast<unsigned char*>(digest.data()), &m_context);
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#else
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SHA1_final(reinterpret_cast<unsigned char*>(digest.data()), &m_context);
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#endif
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return digest;
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}
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void hasher::reset()
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{
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#ifdef TORRENT_USE_LIBGCRYPT
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gcry_md_reset(m_context);
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#elif TORRENT_USE_COMMONCRYPTO
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CC_SHA1_Init(&m_context);
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#elif TORRENT_USE_CRYPTOAPI
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m_context.reset();
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#elif defined TORRENT_USE_LIBCRYPTO
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SHA1_Init(&m_context);
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#else
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SHA1_init(&m_context);
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#endif
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}
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hasher::~hasher()
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{
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#if defined TORRENT_USE_LIBGCRYPT
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gcry_md_close(m_context);
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#endif
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}
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#ifdef TORRENT_MACOS_DEPRECATED_LIBCRYPTO
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#pragma clang diagnostic pop
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#endif
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}
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