#if !BESTHTTP_DISABLE_ALTERNATE_SSL && (!UNITY_WEBGL || UNITY_EDITOR) #pragma warning disable using System; using BestHTTP.SecureProtocol.Org.BouncyCastle.Crypto.Parameters; using BestHTTP.SecureProtocol.Org.BouncyCastle.Utilities; using BestHTTP.SecureProtocol.Org.BouncyCastle.Utilities.Encoders; namespace BestHTTP.SecureProtocol.Org.BouncyCastle.Crypto.Engines { /** * RFC 5794. * * ARIA is a 128-bit block cipher with 128-, 192-, and 256-bit keys. */ public class AriaEngine : IBlockCipher { private static readonly byte[][] C = { Hex.DecodeStrict("517cc1b727220a94fe13abe8fa9a6ee0"), Hex.DecodeStrict("6db14acc9e21c820ff28b1d5ef5de2b0"), Hex.DecodeStrict("db92371d2126e9700324977504e8c90e") }; private static readonly byte[] SB1_sbox = { (byte)0x63, (byte)0x7c, (byte)0x77, (byte)0x7b, (byte)0xf2, (byte)0x6b, (byte)0x6f, (byte)0xc5, (byte)0x30, (byte)0x01, (byte)0x67, (byte)0x2b, (byte)0xfe, (byte)0xd7, (byte)0xab, (byte)0x76, (byte)0xca, (byte)0x82, (byte)0xc9, (byte)0x7d, (byte)0xfa, (byte)0x59, (byte)0x47, (byte)0xf0, (byte)0xad, (byte)0xd4, (byte)0xa2, (byte)0xaf, (byte)0x9c, (byte)0xa4, (byte)0x72, (byte)0xc0, (byte)0xb7, (byte)0xfd, (byte)0x93, (byte)0x26, (byte)0x36, (byte)0x3f, (byte)0xf7, (byte)0xcc, (byte)0x34, (byte)0xa5, (byte)0xe5, (byte)0xf1, (byte)0x71, (byte)0xd8, (byte)0x31, (byte)0x15, (byte)0x04, (byte)0xc7, (byte)0x23, (byte)0xc3, (byte)0x18, (byte)0x96, (byte)0x05, (byte)0x9a, (byte)0x07, (byte)0x12, (byte)0x80, (byte)0xe2, (byte)0xeb, (byte)0x27, (byte)0xb2, (byte)0x75, (byte)0x09, (byte)0x83, (byte)0x2c, (byte)0x1a, (byte)0x1b, (byte)0x6e, (byte)0x5a, (byte)0xa0, (byte)0x52, (byte)0x3b, (byte)0xd6, (byte)0xb3, (byte)0x29, (byte)0xe3, (byte)0x2f, (byte)0x84, (byte)0x53, (byte)0xd1, (byte)0x00, (byte)0xed, (byte)0x20, (byte)0xfc, (byte)0xb1, (byte)0x5b, (byte)0x6a, (byte)0xcb, (byte)0xbe, (byte)0x39, (byte)0x4a, (byte)0x4c, (byte)0x58, (byte)0xcf, (byte)0xd0, (byte)0xef, (byte)0xaa, (byte)0xfb, (byte)0x43, (byte)0x4d, (byte)0x33, (byte)0x85, (byte)0x45, (byte)0xf9, (byte)0x02, (byte)0x7f, (byte)0x50, (byte)0x3c, (byte)0x9f, (byte)0xa8, (byte)0x51, (byte)0xa3, (byte)0x40, (byte)0x8f, (byte)0x92, (byte)0x9d, (byte)0x38, (byte)0xf5, (byte)0xbc, (byte)0xb6, (byte)0xda, (byte)0x21, (byte)0x10, (byte)0xff, (byte)0xf3, (byte)0xd2, (byte)0xcd, (byte)0x0c, (byte)0x13, (byte)0xec, (byte)0x5f, (byte)0x97, (byte)0x44, (byte)0x17, (byte)0xc4, (byte)0xa7, (byte)0x7e, (byte)0x3d, (byte)0x64, (byte)0x5d, (byte)0x19, (byte)0x73, (byte)0x60, (byte)0x81, (byte)0x4f, (byte)0xdc, (byte)0x22, (byte)0x2a, (byte)0x90, (byte)0x88, (byte)0x46, (byte)0xee, (byte)0xb8, (byte)0x14, (byte)0xde, (byte)0x5e, (byte)0x0b, (byte)0xdb, (byte)0xe0, (byte)0x32, (byte)0x3a, (byte)0x0a, (byte)0x49, (byte)0x06, (byte)0x24, (byte)0x5c, (byte)0xc2, (byte)0xd3, (byte)0xac, (byte)0x62, (byte)0x91, (byte)0x95, (byte)0xe4, (byte)0x79, (byte)0xe7, (byte)0xc8, (byte)0x37, (byte)0x6d, (byte)0x8d, (byte)0xd5, (byte)0x4e, (byte)0xa9, (byte)0x6c, (byte)0x56, (byte)0xf4, (byte)0xea, (byte)0x65, (byte)0x7a, (byte)0xae, (byte)0x08, (byte)0xba, (byte)0x78, (byte)0x25, (byte)0x2e, (byte)0x1c, (byte)0xa6, (byte)0xb4, (byte)0xc6, (byte)0xe8, (byte)0xdd, (byte)0x74, (byte)0x1f, (byte)0x4b, (byte)0xbd, (byte)0x8b, (byte)0x8a, (byte)0x70, (byte)0x3e, (byte)0xb5, (byte)0x66, (byte)0x48, (byte)0x03, (byte)0xf6, (byte)0x0e, (byte)0x61, (byte)0x35, (byte)0x57, (byte)0xb9, (byte)0x86, (byte)0xc1, (byte)0x1d, (byte)0x9e, (byte)0xe1, (byte)0xf8, (byte)0x98, (byte)0x11, (byte)0x69, (byte)0xd9, (byte)0x8e, (byte)0x94, (byte)0x9b, (byte)0x1e, (byte)0x87, (byte)0xe9, (byte)0xce, (byte)0x55, (byte)0x28, (byte)0xdf, (byte)0x8c, (byte)0xa1, (byte)0x89, (byte)0x0d, (byte)0xbf, (byte)0xe6, (byte)0x42, (byte)0x68, (byte)0x41, (byte)0x99, (byte)0x2d, (byte)0x0f, (byte)0xb0, (byte)0x54, (byte)0xbb, (byte)0x16 }; private static readonly byte[] SB2_sbox = { (byte)0xe2, (byte)0x4e, (byte)0x54, (byte)0xfc, (byte)0x94, (byte)0xc2, (byte)0x4a, (byte)0xcc, (byte)0x62, (byte)0x0d, (byte)0x6a, (byte)0x46, (byte)0x3c, (byte)0x4d, (byte)0x8b, (byte)0xd1, (byte)0x5e, (byte)0xfa, (byte)0x64, (byte)0xcb, (byte)0xb4, (byte)0x97, (byte)0xbe, (byte)0x2b, (byte)0xbc, (byte)0x77, (byte)0x2e, (byte)0x03, (byte)0xd3, (byte)0x19, (byte)0x59, (byte)0xc1, (byte)0x1d, (byte)0x06, (byte)0x41, (byte)0x6b, (byte)0x55, (byte)0xf0, (byte)0x99, (byte)0x69, (byte)0xea, (byte)0x9c, (byte)0x18, (byte)0xae, (byte)0x63, (byte)0xdf, (byte)0xe7, (byte)0xbb, (byte)0x00, (byte)0x73, (byte)0x66, (byte)0xfb, (byte)0x96, (byte)0x4c, (byte)0x85, (byte)0xe4, (byte)0x3a, (byte)0x09, (byte)0x45, (byte)0xaa, (byte)0x0f, (byte)0xee, (byte)0x10, (byte)0xeb, (byte)0x2d, (byte)0x7f, (byte)0xf4, (byte)0x29, (byte)0xac, (byte)0xcf, (byte)0xad, (byte)0x91, (byte)0x8d, (byte)0x78, (byte)0xc8, (byte)0x95, (byte)0xf9, (byte)0x2f, (byte)0xce, (byte)0xcd, (byte)0x08, (byte)0x7a, (byte)0x88, (byte)0x38, (byte)0x5c, (byte)0x83, (byte)0x2a, (byte)0x28, (byte)0x47, (byte)0xdb, (byte)0xb8, (byte)0xc7, (byte)0x93, (byte)0xa4, (byte)0x12, (byte)0x53, (byte)0xff, (byte)0x87, (byte)0x0e, (byte)0x31, (byte)0x36, (byte)0x21, (byte)0x58, (byte)0x48, (byte)0x01, (byte)0x8e, (byte)0x37, (byte)0x74, (byte)0x32, (byte)0xca, (byte)0xe9, (byte)0xb1, (byte)0xb7, (byte)0xab, (byte)0x0c, (byte)0xd7, (byte)0xc4, (byte)0x56, (byte)0x42, (byte)0x26, (byte)0x07, (byte)0x98, (byte)0x60, (byte)0xd9, (byte)0xb6, (byte)0xb9, (byte)0x11, (byte)0x40, (byte)0xec, (byte)0x20, (byte)0x8c, (byte)0xbd, (byte)0xa0, (byte)0xc9, (byte)0x84, (byte)0x04, (byte)0x49, (byte)0x23, (byte)0xf1, (byte)0x4f, (byte)0x50, (byte)0x1f, (byte)0x13, (byte)0xdc, (byte)0xd8, (byte)0xc0, (byte)0x9e, (byte)0x57, (byte)0xe3, (byte)0xc3, (byte)0x7b, (byte)0x65, (byte)0x3b, (byte)0x02, (byte)0x8f, (byte)0x3e, (byte)0xe8, (byte)0x25, (byte)0x92, (byte)0xe5, (byte)0x15, (byte)0xdd, (byte)0xfd, (byte)0x17, (byte)0xa9, (byte)0xbf, (byte)0xd4, (byte)0x9a, (byte)0x7e, (byte)0xc5, (byte)0x39, (byte)0x67, (byte)0xfe, (byte)0x76, (byte)0x9d, (byte)0x43, (byte)0xa7, (byte)0xe1, (byte)0xd0, (byte)0xf5, (byte)0x68, (byte)0xf2, (byte)0x1b, (byte)0x34, (byte)0x70, (byte)0x05, (byte)0xa3, (byte)0x8a, (byte)0xd5, (byte)0x79, (byte)0x86, (byte)0xa8, (byte)0x30, (byte)0xc6, (byte)0x51, (byte)0x4b, (byte)0x1e, (byte)0xa6, (byte)0x27, (byte)0xf6, (byte)0x35, (byte)0xd2, (byte)0x6e, (byte)0x24, (byte)0x16, (byte)0x82, (byte)0x5f, (byte)0xda, (byte)0xe6, (byte)0x75, (byte)0xa2, (byte)0xef, (byte)0x2c, (byte)0xb2, (byte)0x1c, (byte)0x9f, (byte)0x5d, (byte)0x6f, (byte)0x80, (byte)0x0a, (byte)0x72, (byte)0x44, (byte)0x9b, (byte)0x6c, (byte)0x90, (byte)0x0b, (byte)0x5b, (byte)0x33, (byte)0x7d, (byte)0x5a, (byte)0x52, (byte)0xf3, (byte)0x61, (byte)0xa1, (byte)0xf7, (byte)0xb0, (byte)0xd6, (byte)0x3f, (byte)0x7c, (byte)0x6d, (byte)0xed, (byte)0x14, (byte)0xe0, (byte)0xa5, (byte)0x3d, (byte)0x22, (byte)0xb3, (byte)0xf8, (byte)0x89, (byte)0xde, (byte)0x71, (byte)0x1a, (byte)0xaf, (byte)0xba, (byte)0xb5, (byte)0x81 }; private static readonly byte[] SB3_sbox = { (byte)0x52, (byte)0x09, (byte)0x6a, (byte)0xd5, (byte)0x30, (byte)0x36, (byte)0xa5, (byte)0x38, (byte)0xbf, (byte)0x40, (byte)0xa3, (byte)0x9e, (byte)0x81, (byte)0xf3, (byte)0xd7, (byte)0xfb, (byte)0x7c, (byte)0xe3, (byte)0x39, (byte)0x82, (byte)0x9b, (byte)0x2f, (byte)0xff, (byte)0x87, (byte)0x34, (byte)0x8e, (byte)0x43, (byte)0x44, (byte)0xc4, (byte)0xde, (byte)0xe9, (byte)0xcb, (byte)0x54, (byte)0x7b, (byte)0x94, (byte)0x32, (byte)0xa6, (byte)0xc2, (byte)0x23, (byte)0x3d, (byte)0xee, (byte)0x4c, (byte)0x95, (byte)0x0b, (byte)0x42, (byte)0xfa, (byte)0xc3, (byte)0x4e, (byte)0x08, (byte)0x2e, (byte)0xa1, (byte)0x66, (byte)0x28, (byte)0xd9, (byte)0x24, (byte)0xb2, (byte)0x76, (byte)0x5b, (byte)0xa2, (byte)0x49, (byte)0x6d, (byte)0x8b, (byte)0xd1, (byte)0x25, (byte)0x72, (byte)0xf8, (byte)0xf6, (byte)0x64, (byte)0x86, (byte)0x68, (byte)0x98, (byte)0x16, (byte)0xd4, (byte)0xa4, (byte)0x5c, (byte)0xcc, (byte)0x5d, (byte)0x65, (byte)0xb6, (byte)0x92, (byte)0x6c, (byte)0x70, (byte)0x48, (byte)0x50, (byte)0xfd, (byte)0xed, (byte)0xb9, (byte)0xda, (byte)0x5e, (byte)0x15, (byte)0x46, (byte)0x57, (byte)0xa7, (byte)0x8d, (byte)0x9d, (byte)0x84, (byte)0x90, (byte)0xd8, (byte)0xab, (byte)0x00, (byte)0x8c, (byte)0xbc, (byte)0xd3, (byte)0x0a, (byte)0xf7, (byte)0xe4, (byte)0x58, (byte)0x05, (byte)0xb8, (byte)0xb3, (byte)0x45, (byte)0x06, (byte)0xd0, (byte)0x2c, (byte)0x1e, (byte)0x8f, (byte)0xca, (byte)0x3f, (byte)0x0f, (byte)0x02, (byte)0xc1, (byte)0xaf, (byte)0xbd, (byte)0x03, (byte)0x01, (byte)0x13, (byte)0x8a, (byte)0x6b, (byte)0x3a, (byte)0x91, (byte)0x11, (byte)0x41, (byte)0x4f, (byte)0x67, (byte)0xdc, (byte)0xea, (byte)0x97, (byte)0xf2, (byte)0xcf, (byte)0xce, (byte)0xf0, (byte)0xb4, (byte)0xe6, (byte)0x73, (byte)0x96, (byte)0xac, (byte)0x74, (byte)0x22, (byte)0xe7, (byte)0xad, (byte)0x35, (byte)0x85, (byte)0xe2, (byte)0xf9, (byte)0x37, (byte)0xe8, (byte)0x1c, (byte)0x75, (byte)0xdf, (byte)0x6e, (byte)0x47, (byte)0xf1, (byte)0x1a, (byte)0x71, (byte)0x1d, (byte)0x29, (byte)0xc5, (byte)0x89, (byte)0x6f, (byte)0xb7, (byte)0x62, (byte)0x0e, (byte)0xaa, (byte)0x18, (byte)0xbe, (byte)0x1b, (byte)0xfc, (byte)0x56, (byte)0x3e, (byte)0x4b, (byte)0xc6, (byte)0xd2, (byte)0x79, (byte)0x20, (byte)0x9a, (byte)0xdb, (byte)0xc0, (byte)0xfe, (byte)0x78, (byte)0xcd, (byte)0x5a, (byte)0xf4, (byte)0x1f, (byte)0xdd, (byte)0xa8, (byte)0x33, (byte)0x88, (byte)0x07, (byte)0xc7, (byte)0x31, (byte)0xb1, (byte)0x12, (byte)0x10, (byte)0x59, (byte)0x27, (byte)0x80, (byte)0xec, (byte)0x5f, (byte)0x60, (byte)0x51, (byte)0x7f, (byte)0xa9, (byte)0x19, (byte)0xb5, (byte)0x4a, (byte)0x0d, (byte)0x2d, (byte)0xe5, (byte)0x7a, (byte)0x9f, (byte)0x93, (byte)0xc9, (byte)0x9c, (byte)0xef, (byte)0xa0, (byte)0xe0, (byte)0x3b, (byte)0x4d, (byte)0xae, (byte)0x2a, (byte)0xf5, (byte)0xb0, (byte)0xc8, (byte)0xeb, (byte)0xbb, (byte)0x3c, (byte)0x83, (byte)0x53, (byte)0x99, (byte)0x61, (byte)0x17, (byte)0x2b, (byte)0x04, (byte)0x7e, (byte)0xba, (byte)0x77, (byte)0xd6, (byte)0x26, (byte)0xe1, (byte)0x69, (byte)0x14, (byte)0x63, (byte)0x55, (byte)0x21, (byte)0x0c, (byte)0x7d }; private static readonly byte[] SB4_sbox = { (byte)0x30, (byte)0x68, (byte)0x99, (byte)0x1b, (byte)0x87, (byte)0xb9, (byte)0x21, (byte)0x78, (byte)0x50, (byte)0x39, (byte)0xdb, (byte)0xe1, (byte)0x72, (byte)0x9, (byte)0x62, (byte)0x3c, (byte)0x3e, (byte)0x7e, (byte)0x5e, (byte)0x8e, (byte)0xf1, (byte)0xa0, (byte)0xcc, (byte)0xa3, (byte)0x2a, (byte)0x1d, (byte)0xfb, (byte)0xb6, (byte)0xd6, (byte)0x20, (byte)0xc4, (byte)0x8d, (byte)0x81, (byte)0x65, (byte)0xf5, (byte)0x89, (byte)0xcb, (byte)0x9d, (byte)0x77, (byte)0xc6, (byte)0x57, (byte)0x43, (byte)0x56, (byte)0x17, (byte)0xd4, (byte)0x40, (byte)0x1a, (byte)0x4d, (byte)0xc0, (byte)0x63, (byte)0x6c, (byte)0xe3, (byte)0xb7, (byte)0xc8, (byte)0x64, (byte)0x6a, (byte)0x53, (byte)0xaa, (byte)0x38, (byte)0x98, (byte)0x0c, (byte)0xf4, (byte)0x9b, (byte)0xed, (byte)0x7f, (byte)0x22, (byte)0x76, (byte)0xaf, (byte)0xdd, (byte)0x3a, (byte)0x0b, (byte)0x58, (byte)0x67, (byte)0x88, (byte)0x06, (byte)0xc3, (byte)0x35, (byte)0x0d, (byte)0x01, (byte)0x8b, (byte)0x8c, (byte)0xc2, (byte)0xe6, (byte)0x5f, (byte)0x02, (byte)0x24, (byte)0x75, (byte)0x93, (byte)0x66, (byte)0x1e, (byte)0xe5, (byte)0xe2, (byte)0x54, (byte)0xd8, (byte)0x10, (byte)0xce, (byte)0x7a, (byte)0xe8, (byte)0x08, (byte)0x2c, (byte)0x12, (byte)0x97, (byte)0x32, (byte)0xab, (byte)0xb4, (byte)0x27, (byte)0x0a, (byte)0x23, (byte)0xdf, (byte)0xef, (byte)0xca, (byte)0xd9, (byte)0xb8, (byte)0xfa, (byte)0xdc, (byte)0x31, (byte)0x6b, (byte)0xd1, (byte)0xad, (byte)0x19, (byte)0x49, (byte)0xbd, (byte)0x51, (byte)0x96, (byte)0xee, (byte)0xe4, (byte)0xa8, (byte)0x41, (byte)0xda, (byte)0xff, (byte)0xcd, (byte)0x55, (byte)0x86, (byte)0x36, (byte)0xbe, (byte)0x61, (byte)0x52, (byte)0xf8, (byte)0xbb, (byte)0x0e, (byte)0x82, (byte)0x48, (byte)0x69, (byte)0x9a, (byte)0xe0, (byte)0x47, (byte)0x9e, (byte)0x5c, (byte)0x04, (byte)0x4b, (byte)0x34, (byte)0x15, (byte)0x79, (byte)0x26, (byte)0xa7, (byte)0xde, (byte)0x29, (byte)0xae, (byte)0x92, (byte)0xd7, (byte)0x84, (byte)0xe9, (byte)0xd2, (byte)0xba, (byte)0x5d, (byte)0xf3, (byte)0xc5, (byte)0xb0, (byte)0xbf, (byte)0xa4, (byte)0x3b, (byte)0x71, (byte)0x44, (byte)0x46, (byte)0x2b, (byte)0xfc, (byte)0xeb, (byte)0x6f, (byte)0xd5, (byte)0xf6, (byte)0x14, (byte)0xfe, (byte)0x7c, (byte)0x70, (byte)0x5a, (byte)0x7d, (byte)0xfd, (byte)0x2f, (byte)0x18, (byte)0x83, (byte)0x16, (byte)0xa5, (byte)0x91, (byte)0x1f, (byte)0x05, (byte)0x95, (byte)0x74, (byte)0xa9, (byte)0xc1, (byte)0x5b, (byte)0x4a, (byte)0x85, (byte)0x6d, (byte)0x13, (byte)0x07, (byte)0x4f, (byte)0x4e, (byte)0x45, (byte)0xb2, (byte)0x0f, (byte)0xc9, (byte)0x1c, (byte)0xa6, (byte)0xbc, (byte)0xec, (byte)0x73, (byte)0x90, (byte)0x7b, (byte)0xcf, (byte)0x59, (byte)0x8f, (byte)0xa1, (byte)0xf9, (byte)0x2d, (byte)0xf2, (byte)0xb1, (byte)0x00, (byte)0x94, (byte)0x37, (byte)0x9f, (byte)0xd0, (byte)0x2e, (byte)0x9c, (byte)0x6e, (byte)0x28, (byte)0x3f, (byte)0x80, (byte)0xf0, (byte)0x3d, (byte)0xd3, (byte)0x25, (byte)0x8a, (byte)0xb5, (byte)0xe7, (byte)0x42, (byte)0xb3, (byte)0xc7, (byte)0xea, (byte)0xf7, (byte)0x4c, (byte)0x11, (byte)0x33, (byte)0x03, (byte)0xa2, (byte)0xac, (byte)0x60 }; protected const int BlockSize = 16; private byte[][] m_roundKeys; public virtual void Init(bool forEncryption, ICipherParameters parameters) { KeyParameter keyParameter = parameters as KeyParameter; if (keyParameter == null) throw new ArgumentException("invalid parameter passed to ARIA init - " + BestHTTP.SecureProtocol.Org.BouncyCastle.Utilities.Platform.GetTypeName(parameters)); this.m_roundKeys = KeySchedule(forEncryption, keyParameter.GetKey()); } public virtual string AlgorithmName { get { return "ARIA"; } } public virtual bool IsPartialBlockOkay { get { return false; } } public virtual int GetBlockSize() { return BlockSize; } public virtual int ProcessBlock(byte[] input, int inOff, byte[] output, int outOff) { if (m_roundKeys == null) throw new InvalidOperationException("ARIA engine not initialised"); Check.DataLength(input, inOff, BlockSize, "input buffer too short"); Check.OutputLength(output, outOff, BlockSize, "output buffer too short"); byte[] z = new byte[BlockSize]; Array.Copy(input, inOff, z, 0, BlockSize); int i = 0, rounds = m_roundKeys.Length - 3; while (i < rounds) { FO(z, m_roundKeys[i++]); FE(z, m_roundKeys[i++]); } FO(z, m_roundKeys[i++]); Xor(z, m_roundKeys[i++]); SL2(z); Xor(z, m_roundKeys[i]); Array.Copy(z, 0, output, outOff, BlockSize); return BlockSize; } public virtual void Reset() { // Empty } protected static void A(byte[] z) { byte x0 = z[0], x1 = z[1], x2 = z[2], x3 = z[3], x4 = z[4], x5 = z[5], x6 = z[6], x7 = z[7], x8 = z[8], x9 = z[9], x10 = z[10], x11 = z[11], x12 = z[12], x13 = z[13], x14 = z[14], x15 = z[15]; z[0] = (byte)(x3 ^ x4 ^ x6 ^ x8 ^ x9 ^ x13 ^ x14); z[1] = (byte)(x2 ^ x5 ^ x7 ^ x8 ^ x9 ^ x12 ^ x15); z[2] = (byte)(x1 ^ x4 ^ x6 ^ x10 ^ x11 ^ x12 ^ x15); z[3] = (byte)(x0 ^ x5 ^ x7 ^ x10 ^ x11 ^ x13 ^ x14); z[4] = (byte)(x0 ^ x2 ^ x5 ^ x8 ^ x11 ^ x14 ^ x15); z[5] = (byte)(x1 ^ x3 ^ x4 ^ x9 ^ x10 ^ x14 ^ x15); z[6] = (byte)(x0 ^ x2 ^ x7 ^ x9 ^ x10 ^ x12 ^ x13); z[7] = (byte)(x1 ^ x3 ^ x6 ^ x8 ^ x11 ^ x12 ^ x13); z[8] = (byte)(x0 ^ x1 ^ x4 ^ x7 ^ x10 ^ x13 ^ x15); z[9] = (byte)(x0 ^ x1 ^ x5 ^ x6 ^ x11 ^ x12 ^ x14); z[10] = (byte)(x2 ^ x3 ^ x5 ^ x6 ^ x8 ^ x13 ^ x15); z[11] = (byte)(x2 ^ x3 ^ x4 ^ x7 ^ x9 ^ x12 ^ x14); z[12] = (byte)(x1 ^ x2 ^ x6 ^ x7 ^ x9 ^ x11 ^ x12); z[13] = (byte)(x0 ^ x3 ^ x6 ^ x7 ^ x8 ^ x10 ^ x13); z[14] = (byte)(x0 ^ x3 ^ x4 ^ x5 ^ x9 ^ x11 ^ x14); z[15] = (byte)(x1 ^ x2 ^ x4 ^ x5 ^ x8 ^ x10 ^ x15); } protected static void FE(byte[] D, byte[] RK) { Xor(D, RK); SL2(D); A(D); } protected static void FO(byte[] D, byte[] RK) { Xor(D, RK); SL1(D); A(D); } protected static byte[][] KeySchedule(bool forEncryption, byte[] K) { int keyLen = K.Length; if (keyLen < 16 || keyLen > 32 || (keyLen & 7) != 0) throw new ArgumentException("Key length not 128/192/256 bits."); int keyLenIdx = (keyLen >> 3) - 2; byte[] CK1 = C[keyLenIdx]; byte[] CK2 = C[(keyLenIdx + 1) % 3]; byte[] CK3 = C[(keyLenIdx + 2) % 3]; byte[] KL = new byte[16], KR = new byte[16]; Array.Copy(K, 0, KL, 0, 16); Array.Copy(K, 16, KR, 0, keyLen - 16); byte[] W0 = new byte[16]; byte[] W1 = new byte[16]; byte[] W2 = new byte[16]; byte[] W3 = new byte[16]; Array.Copy(KL, 0, W0, 0, 16); Array.Copy(W0, 0, W1, 0, 16); FO(W1, CK1); Xor(W1, KR); Array.Copy(W1, 0, W2, 0, 16); FE(W2, CK2); Xor(W2, W0); Array.Copy(W2, 0, W3, 0, 16); FO(W3, CK3); Xor(W3, W1); int numRounds = 12 + (keyLenIdx * 2); byte[][] rks = new byte[numRounds + 1][]; rks[0] = KeyScheduleRound(W0, W1, 19); rks[1] = KeyScheduleRound(W1, W2, 19); rks[2] = KeyScheduleRound(W2, W3, 19); rks[3] = KeyScheduleRound(W3, W0, 19); rks[4] = KeyScheduleRound(W0, W1, 31); rks[5] = KeyScheduleRound(W1, W2, 31); rks[6] = KeyScheduleRound(W2, W3, 31); rks[7] = KeyScheduleRound(W3, W0, 31); rks[8] = KeyScheduleRound(W0, W1, 67); rks[9] = KeyScheduleRound(W1, W2, 67); rks[10] = KeyScheduleRound(W2, W3, 67); rks[11] = KeyScheduleRound(W3, W0, 67); rks[12] = KeyScheduleRound(W0, W1, 97); if (numRounds > 12) { rks[13] = KeyScheduleRound(W1, W2, 97); rks[14] = KeyScheduleRound(W2, W3, 97); if (numRounds > 14) { rks[15] = KeyScheduleRound(W3, W0, 97); rks[16] = KeyScheduleRound(W0, W1, 109); } } if (!forEncryption) { ReverseKeys(rks); for (int i = 1; i < numRounds; ++i) { A(rks[i]); } } return rks; } protected static byte[] KeyScheduleRound(byte[] w, byte[] wr, int n) { byte[] rk = new byte[16]; int off = n >> 3, right = n & 7, left = 8 - right; int hi = wr[15 - off] & 0xFF; for (int to = 0; to < 16; ++to) { int lo = wr[(to - off) & 0xF] & 0xFF; int b = (hi << left) | (lo >> right); b ^= (w[to] & 0xFF); rk[to] = (byte)b; hi = lo; } return rk; } protected static void ReverseKeys(byte[][] keys) { int length = keys.Length, limit = length / 2, last = length - 1; for (int i = 0; i < limit; ++i) { byte[] t = keys[i]; keys[i] = keys[last - i]; keys[last - i] = t; } } protected static byte SB1(byte x) { return SB1_sbox[x & 0xFF]; } protected static byte SB2(byte x) { return SB2_sbox[x & 0xFF]; } protected static byte SB3(byte x) { return SB3_sbox[x & 0xFF]; } protected static byte SB4(byte x) { return SB4_sbox[x & 0xFF]; } protected static void SL1(byte[] z) { z[0] = SB1(z[0]); z[1] = SB2(z[1]); z[2] = SB3(z[2]); z[3] = SB4(z[3]); z[4] = SB1(z[4]); z[5] = SB2(z[5]); z[6] = SB3(z[6]); z[7] = SB4(z[7]); z[8] = SB1(z[8]); z[9] = SB2(z[9]); z[10] = SB3(z[10]); z[11] = SB4(z[11]); z[12] = SB1(z[12]); z[13] = SB2(z[13]); z[14] = SB3(z[14]); z[15] = SB4(z[15]); } protected static void SL2(byte[] z) { z[0] = SB3(z[0]); z[1] = SB4(z[1]); z[2] = SB1(z[2]); z[3] = SB2(z[3]); z[4] = SB3(z[4]); z[5] = SB4(z[5]); z[6] = SB1(z[6]); z[7] = SB2(z[7]); z[8] = SB3(z[8]); z[9] = SB4(z[9]); z[10] = SB1(z[10]); z[11] = SB2(z[11]); z[12] = SB3(z[12]); z[13] = SB4(z[13]); z[14] = SB1(z[14]); z[15] = SB2(z[15]); } protected static void Xor(byte[] z, byte[] x) { for (int i = 0; i < 16; ++i) { z[i] ^= x[i]; } } } } #pragma warning restore #endif