Including the node_modules folder for socket.io code.

[KiwiIRC.git] / node / node_modules / socket.io-client / lib / vendor / web-socket-js / flash-src / com / hurlant / util / der / PEM.as

/**\r
 * PEM\r
 * \r
 * A class to parse some PEM stuff.\r
 * Copyright (c) 2007 Henri Torgemane\r
 * \r
 * See LICENSE.txt for full license information.\r
 */\r
package com.hurlant.util.der\r
{\r
	import com.hurlant.crypto.rsa.RSAKey;\r
	import com.hurlant.math.BigInteger;\r
	import com.hurlant.util.Base64;\r
	\r
	import flash.utils.ByteArray;\r
	import com.hurlant.util.Hex;\r
	\r
	public class PEM\r
	{\r
		private static const RSA_PRIVATE_KEY_HEADER:String = "-----BEGIN RSA PRIVATE KEY-----";\r
		private static const RSA_PRIVATE_KEY_FOOTER:String = "-----END RSA PRIVATE KEY-----";\r
		private static const RSA_PUBLIC_KEY_HEADER:String = "-----BEGIN PUBLIC KEY-----";\r
		private static const RSA_PUBLIC_KEY_FOOTER:String = "-----END PUBLIC KEY-----";\r
		private static const CERTIFICATE_HEADER:String = "-----BEGIN CERTIFICATE-----";\r
		private static const CERTIFICATE_FOOTER:String = "-----END CERTIFICATE-----";\r
		\r
		\r
		\r
		/**\r
		 * \r
		 * Read a structure encoded according to\r
		 * ftp://ftp.rsasecurity.com/pub/pkcs/ascii/pkcs-1v2.asc\r
		 * section 11.1.2\r
		 * \r
		 * @param str\r
		 * @return \r
		 * \r
		 */\r
		public static function readRSAPrivateKey(str:String):RSAKey {\r
			var der:ByteArray = extractBinary(RSA_PRIVATE_KEY_HEADER, RSA_PRIVATE_KEY_FOOTER, str);\r
			if (der==null) return null;\r
			var obj:* = DER.parse(der);\r
			if (obj is Array) {\r
				var arr:Array = obj as Array;\r
				// arr[0] is Version. should be 0. should be checked. shoulda woulda coulda.\r
				return new RSAKey(\r
					arr[1],				// N\r
					arr[2].valueOf(),	// E\r
					arr[3],				// D\r
					arr[4],				// P\r
					arr[5],				// Q\r
					arr[6],				// DMP1\r
					arr[7],				// DMQ1	\r
					arr[8]);			// IQMP\r
			} else {\r
				// dunno\r
				return null;\r
			}\r
		}\r
		\r
		\r
		/**\r
		 * Read a structure encoded according to some spec somewhere\r
		 * Also, follows some chunk from\r
		 * ftp://ftp.rsasecurity.com/pub/pkcs/ascii/pkcs-1v2.asc\r
		 * section 11.1\r
		 * \r
		 * @param str\r
		 * @return \r
		 * \r
		 */\r
		public static function readRSAPublicKey(str:String):RSAKey {\r
			var der:ByteArray = extractBinary(RSA_PUBLIC_KEY_HEADER, RSA_PUBLIC_KEY_FOOTER, str);\r
			if (der==null) return null;\r
			var obj:* = DER.parse(der);\r
			if (obj is Array) {\r
				var arr:Array = obj as Array;\r
				// arr[0] = [ <some crap that means "rsaEncryption">, null ]; ( apparently, that's an X-509 Algorithm Identifier.\r
				if (arr[0][0].toString()!=OID.RSA_ENCRYPTION) {\r
					return null;\r
				}\r
				// arr[1] is a ByteArray begging to be parsed as DER\r
				arr[1].position = 1; // there's a 0x00 byte up front. find out why later. like, read a spec.\r
				obj = DER.parse(arr[1]);\r
				if (obj is Array) {\r
					arr = obj as Array;\r
					// arr[0] = modulus\r
					// arr[1] = public expt.\r
					return new RSAKey(arr[0], arr[1]);\r
				} else {\r
					return null;\r
				}\r
			} else {\r
				// dunno\r
				return null;\r
			}\r
		}\r
\r
		public static function readCertIntoArray(str:String):ByteArray {\r
			var tmp:ByteArray = extractBinary(CERTIFICATE_HEADER, CERTIFICATE_FOOTER, str);\r
			return tmp;\r
		}\r
		\r
		private static function extractBinary(header:String, footer:String, str:String):ByteArray {\r
			var i:int = str.indexOf(header);\r
			if (i==-1) return null;\r
			i += header.length;\r
			var j:int = str.indexOf(footer);\r
			if (j==-1) return null;\r
			var b64:String = str.substring(i, j);\r
			// remove whitesapces.\r
			b64 = b64.replace(/\s/mg, '');\r
			// decode\r
			return Base64.decodeToByteArray(b64);\r
		}\r
		\r
	}\r
}