dse/KeyGenerator.as at master · snoble/dse · GitHub

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package dse{
	import com.hurlant.crypto.Crypto;
	import com.hurlant.crypto.hash.IHash;
	import com.hurlant.crypto.prng.Random;
	import com.hurlant.crypto.rsa.RSAKey;
	import com.hurlant.util.Hex;

	import flash.external.ExternalInterface;
	import flash.utils.ByteArray;

	public class KeyGenerator
	{
		public static function generateKeys(passphrase:String):void{
			var exp:String = "10001";
			var rsa:RSAKey = RSAKey.generate(1024, exp);
			ExternalInterface.call("setvalue", "publickey", rsa.n.toString());
			ExternalInterface.call("setvalue", "d", rsa.d.toString());
			ExternalInterface.call("setvalue", "p", rsa.p.toString());
			ExternalInterface.call("setvalue", "q", rsa.q.toString());
			ExternalInterface.call("setvalue", "dmp", rsa.dmp1.toString());
			ExternalInterface.call("setvalue", "dmq", rsa.dmq1.toString());
			ExternalInterface.call("setvalue", "qinv", rsa.coeff.toString());

			var r:Random = new Random;
			var rankey:ByteArray = new ByteArray; var discard:ByteArray = new ByteArray;

			//incorporate passphrase into seeding process
			var hash:IHash = Crypto.getHash("sha256");
			var p:ByteArray = hash.hash(Hex.toArray(Hex.fromString(passphrase)));
			r.autoSeed();
			while (p.bytesAvailable>=4) {
				r.seed(p.readUnsignedInt());
			}

			r.nextBytes(discard, 1024);
			r.nextBytes(rankey, 32);
			ExternalInterface.call("setvalue", "rk", Hex.fromArray(rankey));
		}
	}
}