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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 <openssl/evp.h>
#include "Adler32MessageDigestImpl.h"
namespace aria2 {
#if defined(LIBRESSL_VERSION_NUMBER) || OPENSSL_VERSION_NUMBER < 0x10100001L
namespace {
EVP_MD_CTX* EVP_MD_CTX_new() { return EVP_MD_CTX_create(); }
} // namespace
namespace {
void EVP_MD_CTX_free(EVP_MD_CTX* ctx) { EVP_MD_CTX_destroy(ctx); }
} // namespace
namespace {
int EVP_MD_CTX_reset(EVP_MD_CTX* ctx)
{
EVP_MD_CTX_init(ctx);
return 1;
}
} // namespace
#endif // defined(LIBRESSL_VERSION_NUMBER) || OPENSSL_VERSION_NUMBER <
// 0x10100001L
template <const EVP_MD* (*init_fn)()>
class MessageDigestBase : public MessageDigestImpl {
public:
MessageDigestBase()
: ctx_(EVP_MD_CTX_new()), md_(init_fn()), len_(EVP_MD_size(md_))
{
EVP_MD_CTX_reset(ctx_);
reset();
}
virtual ~MessageDigestBase() { EVP_MD_CTX_free(ctx_); }
static size_t length() { return EVP_MD_size(init_fn()); }
virtual size_t getDigestLength() const CXX11_OVERRIDE { return len_; }
virtual void reset() CXX11_OVERRIDE { EVP_DigestInit_ex(ctx_, md_, nullptr); }
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());
EVP_DigestUpdate(ctx_, bytes, l);
length -= l;
bytes += l;
}
}
virtual void digest(unsigned char* md) CXX11_OVERRIDE
{
unsigned int len;
EVP_DigestFinal_ex(ctx_, md, &len);
}
private:
EVP_MD_CTX* ctx_;
const EVP_MD* md_;
const size_t len_;
};
typedef MessageDigestBase<EVP_md5> MessageDigestMD5;
typedef MessageDigestBase<EVP_sha1> MessageDigestSHA1;
std::unique_ptr<MessageDigestImpl> MessageDigestImpl::sha1()
{
return make_unique<MessageDigestSHA1>();
}
MessageDigestImpl::hashes_t MessageDigestImpl::hashes = {
{"sha-1", make_hi<MessageDigestSHA1>()},
#ifdef HAVE_EVP_SHA224
{"sha-224", make_hi<MessageDigestBase<EVP_sha224>>()},
#endif
#ifdef HAVE_EVP_SHA224
{"sha-256", make_hi<MessageDigestBase<EVP_sha256>>()},
#endif
#ifdef HAVE_EVP_SHA224
{"sha-384", make_hi<MessageDigestBase<EVP_sha384>>()},
#endif
#ifdef HAVE_EVP_SHA224
{"sha-512", make_hi<MessageDigestBase<EVP_sha512>>()},
#endif
{"md5", make_hi<MessageDigestMD5>()},
ADLER32_MESSAGE_DIGEST};
} // namespace aria2
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