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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 <CommonCrypto/CommonDigest.h>
#include "Adler32MessageDigestImpl.h"
namespace aria2 {
namespace {
template <size_t dlen, typename ctx_t, int (*init_fn)(ctx_t*),
int (*update_fn)(ctx_t*, const void*, CC_LONG),
int (*final_fn)(unsigned char*, ctx_t*)>
class MessageDigestBase : public MessageDigestImpl {
public:
MessageDigestBase() { reset(); }
virtual ~MessageDigestBase() = default;
static size_t length() { return dlen; }
virtual size_t getDigestLength() const CXX11_OVERRIDE { return dlen; }
virtual void reset() CXX11_OVERRIDE { init_fn(&ctx_); }
virtual void update(const void* data, size_t length) CXX11_OVERRIDE
{
auto bytes = reinterpret_cast<const char*>(data);
while (length) {
CC_LONG 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(md, &ctx_); }
private:
ctx_t ctx_;
};
typedef MessageDigestBase<CC_MD5_DIGEST_LENGTH, CC_MD5_CTX, CC_MD5_Init,
CC_MD5_Update, CC_MD5_Final> MessageDigestMD5;
typedef MessageDigestBase<CC_SHA1_DIGEST_LENGTH, CC_SHA1_CTX, CC_SHA1_Init,
CC_SHA1_Update, CC_SHA1_Final> MessageDigestSHA1;
typedef MessageDigestBase<CC_SHA224_DIGEST_LENGTH, CC_SHA256_CTX,
CC_SHA224_Init, CC_SHA224_Update,
CC_SHA224_Final> MessageDigestSHA224;
typedef MessageDigestBase<CC_SHA256_DIGEST_LENGTH, CC_SHA256_CTX,
CC_SHA256_Init, CC_SHA256_Update,
CC_SHA256_Final> MessageDigestSHA256;
typedef MessageDigestBase<CC_SHA384_DIGEST_LENGTH, CC_SHA512_CTX,
CC_SHA384_Init, CC_SHA384_Update,
CC_SHA384_Final> MessageDigestSHA384;
typedef MessageDigestBase<CC_SHA512_DIGEST_LENGTH, CC_SHA512_CTX,
CC_SHA512_Init, CC_SHA512_Update,
CC_SHA512_Final> 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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