diff --git a/src/main/c/HybiAccept.cpp b/src/main/c/HybiAccept.cpp
new file mode 100644
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--- /dev/null
+++ b/src/main/c/HybiAccept.cpp
@@ -0,0 +1,49 @@
+// Copyright (c) 2013, Matt Godbolt
+// All rights reserved.
+// 
+// Redistribution and use in source and binary forms, with or without 
+// modification, are permitted provided that the following conditions are met:
+// 
+// Redistributions of source code must retain the above copyright notice, this 
+// list of conditions and the following disclaimer.
+// 
+// Redistributions in binary form must reproduce the above copyright notice, 
+// this list of conditions and the following disclaimer in the documentation 
+// and/or other materials provided with the distribution.
+// 
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 
+// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
+// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 
+// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 
+// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 
+// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 
+// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 
+// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 
+// POSSIBILITY OF SUCH DAMAGE.
+
+#include "internal/Base64.h"
+#include "internal/HybiAccept.h"
+
+#include "sha1/sha1.h"
+
+#include <arpa/inet.h>
+
+namespace seasocks {
+
+static const std::string magicString("258EAFA5-E914-47DA-95CA-C5AB0DC85B11");
+
+std::string getAcceptKey(const std::string& challenge) {
+    auto fullString = challenge + magicString;
+    SHA1 hasher;
+    hasher.Input(fullString.c_str(), fullString.size());
+    unsigned hash[5];
+    hasher.Result(hash);
+    for (int i = 0; i < 5; ++i) {
+        hash[i] = htonl(hash[i]);
+    }
+    return base64Encode(hash, sizeof(hash));
+}
+
+}