diff --git a/SMBLibrary/Authentication/NTLM/Helpers/RC4.cs b/SMBLibrary/Authentication/NTLM/Helpers/RC4.cs new file mode 100644 index 0000000..64c0607 --- /dev/null +++ b/SMBLibrary/Authentication/NTLM/Helpers/RC4.cs @@ -0,0 +1,72 @@ +/* Copyright (C) 2017 Tal Aloni . All rights reserved. + * + * You can redistribute this program and/or modify it under the terms of + * the GNU Lesser Public License as published by the Free Software Foundation, + * either version 3 of the License, or (at your option) any later version. + * + * Based on: https://bitlush.com/blog/rc4-encryption-in-c-sharp + */ +using System; +using System.Collections.Generic; +using System.Text; + +namespace System.Security.Cryptography +{ + public class RC4 + { + public static byte[] Encrypt(byte[] key, byte[] data) + { + return EncryptOutput(key, data); + } + + public static byte[] Decrypt(byte[] key, byte[] data) + { + return EncryptOutput(key, data); + } + + private static byte[] EncryptInitalize(byte[] key) + { + byte[] s = new byte[256]; + for (int index = 0; index < 256; index++) + { + s[index] = (byte)index; + } + + for (int i = 0, j = 0; i < 256; i++) + { + j = (j + key[i % key.Length] + s[i]) & 255; + + Swap(s, i, j); + } + + return s; + } + + private static byte[] EncryptOutput(byte[] key, byte[] data) + { + byte[] s = EncryptInitalize(key); + + int i = 0; + int j = 0; + + byte[] output = new byte[data.Length]; + for (int index = 0; index < data.Length; index++) + { + i = (i + 1) & 255; + j = (j + s[i]) & 255; + + Swap(s, i, j); + output[index] = (byte)(data[index] ^ s[(s[i] + s[j]) & 255]); + } + return output; + } + + private static void Swap(byte[] s, int i, int j) + { + byte c = s[i]; + + s[i] = s[j]; + s[j] = c; + } + } +} diff --git a/SMBLibrary/SMBLibrary.csproj b/SMBLibrary/SMBLibrary.csproj index eb9f53c..766082b 100644 --- a/SMBLibrary/SMBLibrary.csproj +++ b/SMBLibrary/SMBLibrary.csproj @@ -42,6 +42,7 @@ + @@ -531,6 +532,7 @@ + diff --git a/SMBLibrary/Tests/RC4Tests.cs b/SMBLibrary/Tests/RC4Tests.cs new file mode 100644 index 0000000..fe296b0 --- /dev/null +++ b/SMBLibrary/Tests/RC4Tests.cs @@ -0,0 +1,124 @@ +/* Copyright (C) 2017 Tal Aloni . All rights reserved. + * + * You can redistribute this program and/or modify it under the terms of + * the GNU Lesser Public License as published by the Free Software Foundation, + * either version 3 of the License, or (at your option) any later version. + */ +using System; +using System.Collections.Generic; +using System.Security.Cryptography; +using Utilities; + +namespace SMBLibrary +{ + /// + /// https://tools.ietf.org/id/draft-kaukonen-cipher-arcfour-03.txt + /// Test Vectors from Appendix A + /// + public class RC4Tests + { + public static bool Test1() + { + byte[] key = new byte[] { 0x01, 0x23, 0x45, 0x67, 0x89, 0xAB, 0xCD, 0xEF }; + byte[] text = new byte[] { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; + byte[] expectedCipher = new byte[] { 0x74, 0x94, 0xC2, 0xE7, 0x10, 0x4B, 0x08, 0x79 }; + byte[] cipher = RC4.Encrypt(key, text); + return ByteUtils.AreByteArraysEqual(cipher, expectedCipher); + } + + public static bool Test2() + { + byte[] key = new byte[] { 0x61, 0x8A, 0x63, 0xD2, 0xFB }; + byte[] text = new byte[] { 0xDC, 0xEE, 0x4C, 0xF9, 0x2C }; + byte[] expectedCipher = new byte[] { 0xF1, 0x38, 0x29, 0xC9, 0xDE }; + byte[] cipher = RC4.Encrypt(key, text); + return ByteUtils.AreByteArraysEqual(cipher, expectedCipher); + } + + public static bool Test3() + { + byte[] key = new byte[] { 0x29, 0x04, 0x19, 0x72, 0xFB, 0x42, 0xBA, 0x5F, + 0xC7, 0x12, 0x77, 0x12, 0xF1, 0x38, 0x29, 0xC9}; + byte[] text = new byte[] { 0x52, 0x75, 0x69, 0x73, 0x6c, 0x69, 0x6e, 0x6e, + 0x75, 0x6e, 0x20, 0x6c, 0x61, 0x75, 0x6c, 0x75, + 0x20, 0x6b, 0x6f, 0x72, 0x76, 0x69, 0x73, 0x73, + 0x73, 0x61, 0x6e, 0x69, 0x2c, 0x20, 0x74, 0xe4, + 0x68, 0x6b, 0xe4, 0x70, 0xe4, 0x69, 0x64, 0x65, + 0x6e, 0x20, 0x70, 0xe4, 0xe4, 0x6c, 0x6c, 0xe4, + 0x20, 0x74, 0xe4, 0x79, 0x73, 0x69, 0x6b, 0x75, + 0x75, 0x2e, 0x20, 0x4b, 0x65, 0x73, 0xe4, 0x79, + 0xf6, 0x6e, 0x20, 0x6f, 0x6e, 0x20, 0x6f, 0x6e, + 0x6e, 0x69, 0x20, 0x6f, 0x6d, 0x61, 0x6e, 0x61, + 0x6e, 0x69, 0x2c, 0x20, 0x6b, 0x61, 0x73, 0x6b, + 0x69, 0x73, 0x61, 0x76, 0x75, 0x75, 0x6e, 0x20, + 0x6c, 0x61, 0x61, 0x6b, 0x73, 0x6f, 0x74, 0x20, + 0x76, 0x65, 0x72, 0x68, 0x6f, 0x75, 0x75, 0x2e, + 0x20, 0x45, 0x6e, 0x20, 0x6d, 0x61, 0x20, 0x69, + 0x6c, 0x6f, 0x69, 0x74, 0x73, 0x65, 0x2c, 0x20, + 0x73, 0x75, 0x72, 0x65, 0x20, 0x68, 0x75, 0x6f, + 0x6b, 0x61, 0x61, 0x2c, 0x20, 0x6d, 0x75, 0x74, + 0x74, 0x61, 0x20, 0x6d, 0x65, 0x74, 0x73, 0xe4, + 0x6e, 0x20, 0x74, 0x75, 0x6d, 0x6d, 0x75, 0x75, + 0x73, 0x20, 0x6d, 0x75, 0x6c, 0x6c, 0x65, 0x20, + 0x74, 0x75, 0x6f, 0x6b, 0x61, 0x61, 0x2e, 0x20, + 0x50, 0x75, 0x75, 0x6e, 0x74, 0x6f, 0x20, 0x70, + 0x69, 0x6c, 0x76, 0x65, 0x6e, 0x2c, 0x20, 0x6d, + 0x69, 0x20, 0x68, 0x75, 0x6b, 0x6b, 0x75, 0x75, + 0x2c, 0x20, 0x73, 0x69, 0x69, 0x6e, 0x74, 0x6f, + 0x20, 0x76, 0x61, 0x72, 0x61, 0x6e, 0x20, 0x74, + 0x75, 0x75, 0x6c, 0x69, 0x73, 0x65, 0x6e, 0x2c, + 0x20, 0x6d, 0x69, 0x20, 0x6e, 0x75, 0x6b, 0x6b, + 0x75, 0x75, 0x2e, 0x20, 0x54, 0x75, 0x6f, 0x6b, + 0x73, 0x75, 0x74, 0x20, 0x76, 0x61, 0x6e, 0x61, + 0x6d, 0x6f, 0x6e, 0x20, 0x6a, 0x61, 0x20, 0x76, + 0x61, 0x72, 0x6a, 0x6f, 0x74, 0x20, 0x76, 0x65, + 0x65, 0x6e, 0x2c, 0x20, 0x6e, 0x69, 0x69, 0x73, + 0x74, 0xe4, 0x20, 0x73, 0x79, 0x64, 0xe4, 0x6d, + 0x65, 0x6e, 0x69, 0x20, 0x6c, 0x61, 0x75, 0x6c, + 0x75, 0x6e, 0x20, 0x74, 0x65, 0x65, 0x6e, 0x2e, + 0x20, 0x2d, 0x20, 0x45, 0x69, 0x6e, 0x6f, 0x20, + 0x4c, 0x65, 0x69, 0x6e, 0x6f}; + byte[] expectedCipher = new byte[] { 0x35, 0x81, 0x86, 0x99, 0x90, 0x01, 0xe6, 0xb5, + 0xda, 0xf0, 0x5e, 0xce, 0xeb, 0x7e, 0xee, 0x21, + 0xe0, 0x68, 0x9c, 0x1f, 0x00, 0xee, 0xa8, 0x1f, + 0x7d, 0xd2, 0xca, 0xae, 0xe1, 0xd2, 0x76, 0x3e, + 0x68, 0xaf, 0x0e, 0xad, 0x33, 0xd6, 0x6c, 0x26, + 0x8b, 0xc9, 0x46, 0xc4, 0x84, 0xfb, 0xe9, 0x4c, + 0x5f, 0x5e, 0x0b, 0x86, 0xa5, 0x92, 0x79, 0xe4, + 0xf8, 0x24, 0xe7, 0xa6, 0x40, 0xbd, 0x22, 0x32, + 0x10, 0xb0, 0xa6, 0x11, 0x60, 0xb7, 0xbc, 0xe9, + 0x86, 0xea, 0x65, 0x68, 0x80, 0x03, 0x59, 0x6b, + 0x63, 0x0a, 0x6b, 0x90, 0xf8, 0xe0, 0xca, 0xf6, + 0x91, 0x2a, 0x98, 0xeb, 0x87, 0x21, 0x76, 0xe8, + 0x3c, 0x20, 0x2c, 0xaa, 0x64, 0x16, 0x6d, 0x2c, + 0xce, 0x57, 0xff, 0x1b, 0xca, 0x57, 0xb2, 0x13, + 0xf0, 0xed, 0x1a, 0xa7, 0x2f, 0xb8, 0xea, 0x52, + 0xb0, 0xbe, 0x01, 0xcd, 0x1e, 0x41, 0x28, 0x67, + 0x72, 0x0b, 0x32, 0x6e, 0xb3, 0x89, 0xd0, 0x11, + 0xbd, 0x70, 0xd8, 0xaf, 0x03, 0x5f, 0xb0, 0xd8, + 0x58, 0x9d, 0xbc, 0xe3, 0xc6, 0x66, 0xf5, 0xea, + 0x8d, 0x4c, 0x79, 0x54, 0xc5, 0x0c, 0x3f, 0x34, + 0x0b, 0x04, 0x67, 0xf8, 0x1b, 0x42, 0x59, 0x61, + 0xc1, 0x18, 0x43, 0x07, 0x4d, 0xf6, 0x20, 0xf2, + 0x08, 0x40, 0x4b, 0x39, 0x4c, 0xf9, 0xd3, 0x7f, + 0xf5, 0x4b, 0x5f, 0x1a, 0xd8, 0xf6, 0xea, 0x7d, + 0xa3, 0xc5, 0x61, 0xdf, 0xa7, 0x28, 0x1f, 0x96, + 0x44, 0x63, 0xd2, 0xcc, 0x35, 0xa4, 0xd1, 0xb0, + 0x34, 0x90, 0xde, 0xc5, 0x1b, 0x07, 0x11, 0xfb, + 0xd6, 0xf5, 0x5f, 0x79, 0x23, 0x4d, 0x5b, 0x7c, + 0x76, 0x66, 0x22, 0xa6, 0x6d, 0xe9, 0x2b, 0xe9, + 0x96, 0x46, 0x1d, 0x5e, 0x4d, 0xc8, 0x78, 0xef, + 0x9b, 0xca, 0x03, 0x05, 0x21, 0xe8, 0x35, 0x1e, + 0x4b, 0xae, 0xd2, 0xfd, 0x04, 0xf9, 0x46, 0x73, + 0x68, 0xc4, 0xad, 0x6a, 0xc1, 0x86, 0xd0, 0x82, + 0x45, 0xb2, 0x63, 0xa2, 0x66, 0x6d, 0x1f, 0x6c, + 0x54, 0x20, 0xf1, 0x59, 0x9d, 0xfd, 0x9f, 0x43, + 0x89, 0x21, 0xc2, 0xf5, 0xa4, 0x63, 0x93, 0x8c, + 0xe0, 0x98, 0x22, 0x65, 0xee, 0xf7, 0x01, 0x79, + 0xbc, 0x55, 0x3f, 0x33, 0x9e, 0xb1, 0xa4, 0xc1, + 0xaf, 0x5f, 0x6a, 0x54, 0x7f}; + byte[] cipher = RC4.Encrypt(key, text); + return ByteUtils.AreByteArraysEqual(cipher, expectedCipher); + } + } +}