1 files changed, 56 insertions, 0 deletions
diff --git a/Swiften/StringCodecs/SHA256.h b/Swiften/StringCodecs/SHA256.h
new file mode 100644
index 0000000..28a0e05
--- /dev/null
+++ b/Swiften/StringCodecs/SHA256.h
@@ -0,0 +1,56 @@
+/*
+ * Copyright (c) 2010 Remko Tronçon
+ * Licensed under the GNU General Public License v3.
+ * See Documentation/Licenses/GPLv3.txt for more information.
+ */
+
+#pragma once
+
+#include <vector>
+#include <boost/cstdint.hpp>
+
+#include <Swiften/Base/ByteArray.h>
+#include <Swiften/Base/SafeByteArray.h>
+
+namespace Swift {
+	class SHA256 {
+		public:
+			SHA256();
+
+			SHA256& update(const std::vector<unsigned char>& data);
+			std::vector<unsigned char> getHash() const;
+
+			/**
+			 * Equivalent of:
+			 *	SHA256().update(data),getHash(), but slightly more efficient and
+			 *	convenient.
+			 */
+			static ByteArray getHash(const ByteArray& data);
+			static ByteArray getHash(const SafeByteArray& data);
+
+			ByteArray operator()(const SafeByteArray& data) {
+				return getHash(data);
+			}
+
+			ByteArray operator()(const ByteArray& data) {
+				return getHash(data);
+			}
+
+		private:
+			struct State {
+					boost::uint64_t length;
+					boost::uint32_t state[8], curlen;
+					unsigned char buf[64];
+			};
+
+			static int init(State *md);
+			static int process(State * md, const unsigned char *in, unsigned int inlen);
+			static int compress(State *md, unsigned char *buf);
+			static int done(State * md, unsigned char *out);
+
+			template<typename Container> static	ByteArray getHashInternal(const Container& input);
+
+		private:
+			State state;
+	};
+}