mirror of https://github.com/aria2/aria2
108 lines
3.4 KiB
C++
108 lines
3.4 KiB
C++
/* <!-- copyright */
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/*
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* aria2 - The high speed download utility
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*
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* Copyright (C) 2013 Nils Maier
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* In addition, as a special exception, the copyright holders give
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* permission to link the code of portions of this program with the
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* OpenSSL library under certain conditions as described in each
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* individual source file, and distribute linked combinations
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* including the two.
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* You must obey the GNU General Public License in all respects
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* for all of the code used other than OpenSSL. If you modify
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* file(s) with this exception, you may extend this exception to your
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* version of the file(s), but you are not obligated to do so. If you
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* do not wish to do so, delete this exception statement from your
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* version. If you delete this exception statement from all source
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* files in the program, then also delete it here.
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*/
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/* copyright --> */
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#include "MessageDigestImpl.h"
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#include <openssl/evp.h>
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namespace aria2 {
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template<const EVP_MD* (*init_fn)()>
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class MessageDigestBase : public MessageDigestImpl {
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public:
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MessageDigestBase() : md_(init_fn()), len_(EVP_MD_size(md_)) {
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EVP_MD_CTX_init(&ctx_);
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reset();
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}
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virtual ~MessageDigestBase() {
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EVP_MD_CTX_cleanup(&ctx_);
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}
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static size_t length() {
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return EVP_MD_size(init_fn());
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}
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virtual size_t getDigestLength() const CXX11_OVERRIDE {
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return len_;
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}
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virtual void reset() CXX11_OVERRIDE {
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EVP_DigestInit_ex(&ctx_, md_, 0);
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}
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virtual void update(const void* data, size_t length) CXX11_OVERRIDE {
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auto bytes = reinterpret_cast<const char*>(data);
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while (length) {
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size_t l = std::min(length, (size_t)std::numeric_limits<uint32_t>::max());
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EVP_DigestUpdate(&ctx_, bytes, l);
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length -= l;
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bytes += l;
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}
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}
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virtual void digest(unsigned char* md) CXX11_OVERRIDE {
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unsigned int len;
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EVP_DigestFinal_ex(&ctx_, md, &len);
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}
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private:
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EVP_MD_CTX ctx_;
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const EVP_MD* md_;
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const size_t len_;
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};
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typedef MessageDigestBase<EVP_md5> MessageDigestMD5;
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typedef MessageDigestBase<EVP_sha1> MessageDigestSHA1;
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std::unique_ptr<MessageDigestImpl> MessageDigestImpl::sha1()
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{
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return std::unique_ptr<MessageDigestImpl>(new MessageDigestSHA1());
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}
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MessageDigestImpl::hashes_t MessageDigestImpl::hashes = {
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{ "sha-1", make_hi<MessageDigestSHA1>() },
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#ifdef HAVE_EVP_SHA224
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{ "sha-224", make_hi<MessageDigestBase<EVP_sha224> >() },
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#endif
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#ifdef HAVE_EVP_SHA224
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{ "sha-256", make_hi<MessageDigestBase<EVP_sha256> >() },
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#endif
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#ifdef HAVE_EVP_SHA224
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{ "sha-384", make_hi<MessageDigestBase<EVP_sha384> >() },
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#endif
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#ifdef HAVE_EVP_SHA224
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{ "sha-512", make_hi<MessageDigestBase<EVP_sha512> >() },
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#endif
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{ "md5", make_hi<MessageDigestMD5>() },
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};
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} // namespace aria2
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