1 files changed, 115 insertions, 0 deletions
diff --git a/src/LibnettleMessageDigestImpl.cc b/src/LibnettleMessageDigestImpl.cc
new file mode 100644
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+++ b/src/LibnettleMessageDigestImpl.cc
@@ -0,0 +1,115 @@
+/* <!-- copyright */
+/*
+ * aria2 - The high speed download utility
+ *
+ * Copyright (C) 2011 Tatsuhiro Tsujikawa
+ *
+ * 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 "LibnettleMessageDigestImpl.h"
+
+#include <algorithm>
+
+#include "array_fun.h"
+#include "HashFuncEntry.h"
+
+namespace aria2 {
+
+MessageDigestImpl::MessageDigestImpl(const nettle_hash* hashInfo)
+  : hashInfo_(hashInfo),
+    ctx_(new char[hashInfo->context_size])
+{
+  reset();
+}
+
+MessageDigestImpl::~MessageDigestImpl()
+{
+  delete [] ctx_;
+}
+
+SharedHandle<MessageDigestImpl> MessageDigestImpl::sha1()
+{
+  return SharedHandle<MessageDigestImpl>(new MessageDigestImpl(&nettle_sha1));
+}
+
+typedef HashFuncEntry<const nettle_hash*> CHashFuncEntry;
+typedef FindHashFunc<const nettle_hash*> CFindHashFunc;
+
+namespace {
+CHashFuncEntry hashFuncs[] = {
+  CHashFuncEntry("sha-1", &nettle_sha1),
+  CHashFuncEntry("sha-224", &nettle_sha224),
+  CHashFuncEntry("sha-256", &nettle_sha256),
+  CHashFuncEntry("sha-384", &nettle_sha384),
+  CHashFuncEntry("sha-512", &nettle_sha512),
+  CHashFuncEntry("md5", &nettle_md5)
+};
+} // namespace
+
+SharedHandle<MessageDigestImpl> MessageDigestImpl::create
+(const std::string& hashType)
+{
+  const nettle_hash* hashInfo =
+    getHashFunc(vbegin(hashFuncs), vend(hashFuncs), hashType);
+  return SharedHandle<MessageDigestImpl>(new MessageDigestImpl(hashInfo));
+}
+
+bool MessageDigestImpl::supports(const std::string& hashType)
+{
+  return vend(hashFuncs) != std::find_if(vbegin(hashFuncs), vend(hashFuncs),
+                                         CFindHashFunc(hashType));
+}
+
+size_t MessageDigestImpl::getDigestLength(const std::string& hashType)
+{
+  const nettle_hash* hashInfo =
+    getHashFunc(vbegin(hashFuncs), vend(hashFuncs), hashType);
+  return hashInfo->digest_size;
+}
+
+size_t MessageDigestImpl::getDigestLength() const
+{
+  return hashInfo_->digest_size;
+}
+
+void MessageDigestImpl::reset()
+{
+  hashInfo_->init(ctx_);
+}
+void MessageDigestImpl::update(const void* data, size_t length)
+{
+  hashInfo_->update(ctx_, length, static_cast<const uint8_t*>(data));
+}
+
+void MessageDigestImpl::digest(unsigned char* md)
+{
+  hashInfo_->digest(ctx_, getDigestLength(), md);
+}
+
+} // namespace aria2