diff --git a/OpenRA.FileFormats/FileFormats/BlowfishKeyProvider.cs b/OpenRA.FileFormats/FileFormats/BlowfishKeyProvider.cs
index 301da73330..a71404a221 100644
--- a/OpenRA.FileFormats/FileFormats/BlowfishKeyProvider.cs
+++ b/OpenRA.FileFormats/FileFormats/BlowfishKeyProvider.cs
@@ -19,24 +19,6 @@ namespace OpenRA.FileFormats
 	{
 		const string pubkeyStr = "AihRvNoIbTn85FZRYNZRcT+i6KpU+maCsEqr3Q5q+LDB5tH7Tz2qQ38V";
 
-		static sbyte[] char2num = {
-	-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-	-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-	-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 62, -1, -1, -1, 63,
-	52, 53, 54, 55, 56, 57, 58, 59, 60, 61, -1, -1, -1, -1, -1, -1,
-	-1,  0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 14,
-	15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, -1, -1, -1, -1, -1,
-	-1, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40,
-	41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, -1, -1, -1, -1, -1,
-	-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-	-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-	-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-	-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-	-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-	-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-	-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-	-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1};
-
 		class PublicKey
 		{
 			public uint[] key1 = new uint[64];
@@ -128,25 +110,9 @@ namespace OpenRA.FileFormats
 
 		void init_pubkey()
 		{
-			int i = 0;
-			uint i2, tmp;
-			byte[] keytmp = new byte[256];
-
 			init_bignum(pubkey.key2, 0x10001, 64);
 
-			i2 = 0;
-			while (i < pubkeyStr.Length)
-			{
-				tmp = (uint)char2num[pubkeyStr[i++]];
-				tmp <<= 6; tmp |= (uint)(byte)char2num[pubkeyStr[i++]];
-				tmp <<= 6; tmp |= (uint)(byte)char2num[pubkeyStr[i++]];
-				tmp <<= 6; tmp |= (uint)(byte)char2num[pubkeyStr[i++]];
-				keytmp[i2++] = (byte)((tmp >> 16) & 0xff);
-				keytmp[i2++] = (byte)((tmp >> 8) & 0xff);
-				keytmp[i2++] = (byte)(tmp & 0xff);
-			}
-
-			key_to_bignum(pubkey.key1, keytmp, 64);
+			key_to_bignum(pubkey.key1, Convert.FromBase64String(pubkeyStr), 64);
 			pubkey.len = bitlen_bignum(pubkey.key1, 64) - 1;
 		}