1 files changed, 27 insertions, 0 deletions
diff --git a/Swiften/StringCodecs/SHA1.h b/Swiften/StringCodecs/SHA1.h
index fc5ba0e..9c0232a 100644
--- a/Swiften/StringCodecs/SHA1.h
+++ b/Swiften/StringCodecs/SHA1.h
@@ -6,11 +6,38 @@
 
 #pragma once
 
+#include <vector>
+#include <boost/cstdint.hpp>
+
 #include "Swiften/Base/ByteArray.h"
 
 namespace Swift {
 	class SHA1 {
 		public:
+			SHA1();
+
+			SHA1& update(const std::vector<unsigned char>& data);
+			std::vector<unsigned char> getHash() const;
+
+			/**
+			 * Equivalent of:
+			 *	SHA1().update(data),getHash(), but slightly more efficient and
+			 *	convenient.
+			 */
 			static ByteArray getHash(const ByteArray& data);
+
+		private:
+			typedef struct {
+					boost::uint32_t state[5];
+					boost::uint32_t count[2];
+					boost::uint8_t buffer[64];
+			} CTX;
+			static void Init(CTX* context);
+			static void Transform(boost::uint32_t state[5], boost::uint8_t buffer[64]);
+			static void Update(CTX* context, boost::uint8_t* data, unsigned int len);
+			static void Final(boost::uint8_t digest[20], CTX* context);
+
+		private:
+			CTX context;
 	};
 }