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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 "md5.h"
#include "sha1.h"
namespace aria2 {
namespace {
template<size_t dlen,
typename ctx_t,
int (*init_fn)(ctx_t**),
void (*update_fn)(ctx_t*, const void*, size_t),
void (*final_fn)(ctx_t*, uint8_t*),
void (*free_fn)(ctx_t**)>
class MessageDigestBase : public MessageDigestImpl {
public:
MessageDigestBase() : ctx_(nullptr) { reset(); }
virtual ~MessageDigestBase()
{
free_fn(&ctx_);
}
static size_t length()
{
return dlen;
}
virtual size_t getDigestLength() const CXX11_OVERRIDE
{
return dlen;
}
virtual void reset() CXX11_OVERRIDE
{
free_fn(&ctx_);
init_fn(&ctx_);
}
virtual void update(const void* data, size_t length) CXX11_OVERRIDE
{
auto bytes = reinterpret_cast<const char*>(data);
while (length) {
size_t l = std::min(length, (size_t)std::numeric_limits<uint32_t>::max());
update_fn(ctx_, bytes, l);
length -= l;
bytes += l;
}
}
virtual void digest(unsigned char* md) CXX11_OVERRIDE
{
final_fn(ctx_, md);
}
private:
ctx_t* ctx_;
};
typedef MessageDigestBase<MD5_LENGTH,
struct MD5_CTX,
MD5_Init,
MD5_Update,
MD5_Final,
MD5_Free>
MessageDigestMD5;
typedef MessageDigestBase<SHA1_LENGTH,
SHA1_CTX,
SHA1_Init,
SHA1_Update,
SHA1_Final,
SHA1_Free>
MessageDigestSHA1;
} // namespace
std::unique_ptr<MessageDigestImpl> MessageDigestImpl::sha1()
{
return make_unique<MessageDigestSHA1>();
}
MessageDigestImpl::hashes_t MessageDigestImpl::hashes = {
{ "sha-1", make_hi<MessageDigestSHA1>() },
{ "md5", make_hi<MessageDigestMD5>() },
};
} // namespace aria2
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