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/* <!-- copyright */
/*
* aria2 - The high speed download utility
*
* Copyright (C) 2013 Nils Maier
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* In addition, as a special exception, the copyright holders give
* permission to link the code of portions of this program with the
* OpenSSL library under certain conditions as described in each
* individual source file, and distribute linked combinations
* including the two.
* You must obey the GNU General Public License in all respects
* for all of the code used other than OpenSSL. If you modify
* file(s) with this exception, you may extend this exception to your
* version of the file(s), but you are not obligated to do so. If you
* do not wish to do so, delete this exception statement from your
* version. If you delete this exception statement from all source
* files in the program, then also delete it here.
*/
/* copyright --> */
#include "MessageDigestImpl.h"
#include <gcrypt.h>
#include "Adler32MessageDigestImpl.h"
namespace aria2 {
namespace {
template <int hash> class MessageDigestBase : public MessageDigestImpl {
private:
struct Deleter {
void operator()(gcry_md_hd_t ctx)
{
if (ctx) {
gcry_md_close(ctx);
}
}
};
public:
MessageDigestBase()
{
gcry_md_hd_t ctx = nullptr;
gcry_md_open(&ctx, hash, 0);
ctx_.reset(ctx);
reset();
}
virtual ~MessageDigestBase() = default;
static size_t length() { return ::gcry_md_get_algo_dlen(hash); }
virtual size_t getDigestLength() const CXX11_OVERRIDE
{
return ::gcry_md_get_algo_dlen(hash);
}
virtual void reset() CXX11_OVERRIDE { ::gcry_md_reset(ctx_.get()); }
virtual void update(const void* data, size_t length) CXX11_OVERRIDE
{
auto bytes = reinterpret_cast<const uint8_t*>(data);
while (length) {
size_t l = std::min(length, (size_t)std::numeric_limits<uint32_t>::max());
gcry_md_write(ctx_.get(), bytes, length);
length -= l;
bytes += l;
}
}
virtual void digest(unsigned char* md) CXX11_OVERRIDE
{
::memcpy(md, gcry_md_read(ctx_.get(), 0), getDigestLength());
}
private:
std::unique_ptr<std::remove_pointer<gcry_md_hd_t>::type, Deleter> ctx_;
};
typedef MessageDigestBase<GCRY_MD_MD5> MessageDigestMD5;
typedef MessageDigestBase<GCRY_MD_SHA1> MessageDigestSHA1;
typedef MessageDigestBase<GCRY_MD_SHA224> MessageDigestSHA224;
typedef MessageDigestBase<GCRY_MD_SHA256> MessageDigestSHA256;
typedef MessageDigestBase<GCRY_MD_SHA384> MessageDigestSHA384;
typedef MessageDigestBase<GCRY_MD_SHA512> MessageDigestSHA512;
} // namespace
std::unique_ptr<MessageDigestImpl> MessageDigestImpl::sha1()
{
return make_unique<MessageDigestSHA1>();
}
MessageDigestImpl::hashes_t MessageDigestImpl::hashes = {
{"sha-1", make_hi<MessageDigestSHA1>()},
{"sha-224", make_hi<MessageDigestSHA224>()},
{"sha-256", make_hi<MessageDigestSHA256>()},
{"sha-384", make_hi<MessageDigestSHA384>()},
{"sha-512", make_hi<MessageDigestSHA512>()},
{"md5", make_hi<MessageDigestMD5>()},
ADLER32_MESSAGE_DIGEST};
} // namespace aria2
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