Basic OAuth implementation.

Only 1.0 right now and without access/request/refresh tokens.
Doesn't support GET/POST params at the moment either.

haxe/crypto/Hmac.hx

@@ -0,0 +1,85 @@
+/*
+ * Copyright (C)2005-2012 Haxe Foundation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+package haxe.crypto;
+
+enum HashMethod {
+	MD5;
+	SHA1;
+	SHA256;
+}
+
+class Hmac {
+	
+	var method : HashMethod;
+	var blockSize : Int;
+	var length : Int;
+	
+	public function new( hashMethod : HashMethod ) {
+		method = hashMethod;
+		blockSize = switch ( hashMethod ) {
+			case MD5, SHA1, SHA256: 64;
+		}
+		length = switch ( hashMethod ) {
+			case MD5: 16;
+			case SHA1: 20;
+			case SHA256: 32;
+		}
+	}
+	
+	inline function doHash( b : haxe.io.Bytes ) : haxe.io.Bytes {
+		return switch ( method ) {
+			case MD5: Md5.make(b);
+			case SHA1: Sha1.make(b);
+			case SHA256: Sha256.make(b);
+		}
+	}
+	
+	function nullPad( s : haxe.io.Bytes, chunkLen : Int ) : haxe.io.Bytes {
+		var r = chunkLen - (s.length % chunkLen);
+		if(r == chunkLen && s.length != 0)
+			return s;
+		var sb = new haxe.io.BytesBuffer();
+		sb.add(s);
+		for(x in 0...r)
+			sb.addByte(0);
+		return sb.getBytes();
+	}
+	
+	public function make( key : haxe.io.Bytes, msg : haxe.io.Bytes ) : haxe.io.Bytes {
+		if(key.length > blockSize) {
+			key = doHash(key);
+		}
+		key = nullPad(key, blockSize);
+
+		var Ki = new haxe.io.BytesBuffer();
+		var Ko = new haxe.io.BytesBuffer();
+		for (i in 0...key.length) {
+			Ko.addByte(key.get(i) ^ 0x5c);
+			Ki.addByte(key.get(i) ^ 0x36);
+		}
+		// hash(Ko + hash(Ki + message))
+		Ki.add(msg);
+		Ko.add(doHash(Ki.getBytes()));
+		return doHash(Ko.getBytes());
+	}
+	
+}