//
// System.Security.Cryptography.DESCryptoServiceProvider
//
// Authors:
// Sergey Chaban (serge@wildwestsoftware.com)
// Sebastien Pouliot (sebastien@ximian.com)
//
// Portions (C) 2002 Motus Technologies Inc. (http://www.motus.com)
// Copyright (C) 2004-2005 Novell, Inc (http://www.novell.com)
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
using System.Runtime.InteropServices;
using Mono.Security.Cryptography;
namespace System.Security.Cryptography{
// References:
// a. FIPS PUB 46-3: Data Encryption Standard
// http://csrc.nist.gov/publications/fips/fips46-3/fips46-3.pdf
internal class DESTransform : SymmetricTransform {
internal static readonly int KEY_BIT_SIZE = 64;
internal static readonly int KEY_BYTE_SIZE = KEY_BIT_SIZE / 8;
internal static readonly int BLOCK_BIT_SIZE = 64;
internal static readonly int BLOCK_BYTE_SIZE = BLOCK_BIT_SIZE / 8;
private byte[] keySchedule;
private byte[] byteBuff;
private uint[] dwordBuff;
/*
// S-boxes from FIPS 46-3, Appendix 1, page 17
private static readonly byte [] sBoxes = {
14, 4, 13, 1, 2, 15, 11, 8, 3, 10, 6, 12, 5, 9, 0, 7,
0, 15, 7, 4, 14, 2, 13, 1, 10, 6, 12, 11, 9, 5, 3, 8,
4, 1, 14, 8, 13, 6, 2, 11, 15, 12, 9, 7, 3, 10, 5, 0,
15, 12, 8, 2, 4, 9, 1, 7, 5, 11, 3, 14, 10, 0, 6, 13,
15, 1, 8, 14, 6, 11, 3, 4, 9, 7, 2, 13, 12, 0, 5, 10,
3, 13, 4, 7, 15, 2, 8, 14, 12, 0, 1, 10, 6, 9, 11, 5,
0, 14, 7, 11, 10, 4, 13, 1, 5, 8, 12, 6, 9, 3, 2, 15,
13, 8, 10, 1, 3, 15, 4, 2, 11, 6, 7, 12, 0, 5, 14, 9,
10, 0, 9, 14, 6, 3, 15, 5, 1, 13, 12, 7, 11, 4, 2, 8,
13, 7, 0, 9, 3, 4, 6, 10, 2, 8, 5, 14, 12, 11, 15, 1,
13, 6, 4, 9, 8, 15, 3, 0, 11, 1, 2, 12, 5, 10, 14, 7,
1, 10, 13, 0, 6, 9, 8, 7, 4, 15, 14, 3, 11, 5, 2, 12,
7, 13, 14, 3, 0, 6, 9, 10, 1, 2, 8, 5, 11, 12, 4, 15,
13, 8, 11, 5, 6, 15, 0, 3, 4, 7, 2, 12, 1, 10, 14, 9,
10, 6, 9, 0, 12, 11, 7, 13, 15, 1, 3, 14, 5, 2, 8, 4,
3, 15, 0, 6, 10, 1, 13, 8, 9, 4, 5, 11, 12, 7, 2, 14,
2, 12, 4, 1, 7, 10, 11, 6, 8, 5, 3, 15, 13, 0, 14, 9,
14, 11, 2, 12, 4, 7, 13, 1, 5, 0, 15, 10, 3, 9, 8, 6,
4, 2, 1, 11, 10, 13, 7, 8, 15, 9, 12, 5, 6, 3, 0, 14,
11, 8, 12, 7, 1, 14, 2, 13, 6, 15, 0, 9, 10, 4, 5, 3,
12, 1, 10, 15, 9, 2, 6, 8, 0, 13, 3, 4, 14, 7, 5, 11,
10, 15, 4, 2, 7, 12, 9, 5, 6, 1, 13, 14, 0, 11, 3, 8,
9, 14, 15, 5, 2, 8, 12, 3, 7, 0, 4, 10, 1, 13, 11, 6,
4, 3, 2, 12, 9, 5, 15, 10, 11, 14, 1, 7, 6, 0, 8, 13,
4, 11, 2, 14, 15, 0, 8, 13, 3, 12, 9, 7, 5, 10, 6, 1,
13, 0, 11, 7, 4, 9, 1, 10, 14, 3, 5, 12, 2, 15, 8, 6,
1, 4, 11, 13, 12, 3, 7, 14, 10, 15, 6, 8, 0, 5, 9, 2,
6, 11, 13, 8, 1, 4, 10, 7, 9, 5, 0, 15, 14, 2, 3, 12,
13, 2, 8, 4, 6, 15, 11, 1, 10, 9, 3, 14, 5, 0, 12, 7,
1, 15, 13, 8, 10, 3, 7, 4, 12, 5, 6, 11, 0, 14, 9, 2,
7, 11, 4, 1, 9, 12, 14, 2, 0, 6, 10, 13, 15, 3, 5, 8,
2, 1, 14, 7, 4, 10, 8, 13, 15, 12, 9, 0, 3, 5, 6, 11
};
// P table from page 15, also in Appendix 1, page 18
private static readonly byte [] pTab = {
16-1, 7-1, 20-1, 21-1,
29-1, 12-1, 28-1, 17-1,
1-1, 15-1, 23-1, 26-1,
5-1, 18-1, 31-1, 10-1,
2-1, 8-1, 24-1, 14-1,
32-1, 27-1, 3-1, 9-1,
19-1, 13-1, 30-1, 6-1,
22-1, 11-1, 4-1, 25-1
};
*/
// pre-computed result of sBoxes (using pTab)
private static readonly uint[] spBoxes = {
0x00808200, 0x00000000, 0x00008000, 0x00808202, 0x00808002, 0x00008202, 0x00000002, 0x00008000,
0x00000200, 0x00808200, 0x00808202, 0x00000200, 0x00800202, 0x00808002, 0x00800000, 0x00000002,
0x00000202, 0x00800200, 0x00800200, 0x00008200, 0x00008200, 0x00808000, 0x00808000, 0x00800202,
0x00008002, 0x00800002, 0x00800002, 0x00008002, 0x00000000, 0x00000202, 0x00008202, 0x00800000,
0x00008000, 0x00808202, 0x00000002, 0x00808000, 0x00808200, 0x00800000, 0x00800000, 0x00000200,
0x00808002, 0x00008000, 0x00008200, 0x00800002, 0x00000200, 0x00000002, 0x00800202, 0x00008202,
0x00808202, 0x00008002, 0x00808000, 0x00800202, 0x00800002, 0x00000202, 0x00008202, 0x00808200,
0x00000202, 0x00800200, 0x00800200, 0x00000000, 0x00008002, 0x00008200, 0x00000000, 0x00808002,
0x40084010, 0x40004000, 0x00004000, 0x00084010, 0x00080000, 0x00000010, 0x40080010, 0x40004010,
0x40000010, 0x40084010, 0x40084000, 0x40000000, 0x40004000, 0x00080000, 0x00000010, 0x40080010,
0x00084000, 0x00080010, 0x40004010, 0x00000000, 0x40000000, 0x00004000, 0x00084010, 0x40080000,
0x00080010, 0x40000010, 0x00000000, 0x00084000, 0x00004010, 0x40084000, 0x40080000, 0x00004010,
0x00000000, 0x00084010, 0x40080010, 0x00080000, 0x40004010, 0x40080000, 0x40084000, 0x00004000,
0x40080000, 0x40004000, 0x00000010, 0x40084010, 0x00084010, 0x00000010, 0x00004000, 0x40000000,
0x00004010, 0x40084000, 0x00080000, 0x40000010, 0x00080010, 0x40004010, 0x40000010, 0x00080010,
0x00084000, 0x00000000, 0x40004000, 0x00004010, 0x40000000, 0x40080010, 0x40084010, 0x00084000,
0x00000104, 0x04010100, 0x00000000, 0x04010004, 0x04000100, 0x00000000, 0x00010104, 0x04000100,
0x00010004, 0x04000004, 0x04000004, 0x00010000, 0x04010104, 0x00010004, 0x04010000, 0x00000104,
0x04000000, 0x00000004, 0x04010100, 0x00000100, 0x00010100, 0x04010000, 0x04010004, 0x00010104,
0x04000104, 0x00010100, 0x00010000, 0x04000104, 0x00000004, 0x04010104, 0x00000100, 0x04000000,
0x04010100, 0x04000000, 0x00010004, 0x00000104, 0x00010000, 0x04010100, 0x04000100, 0x00000000,
0x00000100, 0x00010004, 0x04010104, 0x04000100, 0x04000004, 0x00000100, 0x00000000, 0x04010004,
0x04000104, 0x00010000, 0x04000000, 0x04010104, 0x00000004, 0x00010104, 0x00010100, 0x04000004,
0x04010000, 0x04000104, 0x00000104, 0x04010000, 0x00010104, 0x00000004, 0x04010004, 0x00010100,
0x80401000, 0x80001040, 0x80001040, 0x00000040, 0x00401040, 0x80400040, 0x80400000, 0x80001000,
0x00000000, 0x00401000, 0x00401000, 0x80401040, 0x80000040, 0x00000000, 0x00400040, 0x80400000,
0x80000000, 0x00001000, 0x00400000, 0x80401000, 0x00000040, 0x00400000, 0x80001000, 0x00001040,
0x80400040, 0x80000000, 0x00001040, 0x00400040, 0x00001000, 0x00401040, 0x80401040, 0x80000040,
0x00400040, 0x80400000, 0x00401000, 0x80401040, 0x80000040, 0x00000000, 0x00000000, 0x00401000,
0x00001040, 0x00400040, 0x80400040, 0x80000000, 0x80401000, 0x80001040, 0x80001040, 0x00000040,
0x80401040, 0x80000040, 0x80000000, 0x00001000, 0x80400000, 0x80001000, 0x00401040, 0x80400040,
0x80001000, 0x00001040, 0x00400000, 0x80401000, 0x00000040, 0x00400000, 0x00001000, 0x00401040,
0x00000080, 0x01040080, 0x01040000, 0x21000080, 0x00040000, 0x00000080, 0x20000000, 0x01040000,
0x20040080, 0x00040000, 0x01000080, 0x20040080, 0x21000080, 0x21040000, 0x00040080, 0x20000000,
0x01000000, 0x20040000, 0x20040000, 0x00000000, 0x20000080, 0x21040080, 0x21040080, 0x01000080,
0x21040000, 0x20000080, 0x00000000, 0x21000000, 0x01040080, 0x01000000, 0x21000000, 0x00040080,
0x00040000, 0x21000080, 0x00000080, 0x01000000, 0x20000000, 0x01040000, 0x21000080, 0x20040080,
0x01000080, 0x20000000, 0x21040000, 0x01040080, 0x20040080, 0x00000080, 0x01000000, 0x21040000,
0x21040080, 0x00040080, 0x21000000, 0x21040080, 0x01040000, 0x00000000, 0x20040000, 0x21000000,
0x00040080, 0x01000080, 0x20000080, 0x00040000, 0x00000000, 0x20040000, 0x01040080, 0x20000080,
0x10000008, 0x10200000, 0x00002000, 0x10202008, 0x10200000, 0x00000008, 0x10202008, 0x00200000,
0x10002000, 0x00202008, 0x00200000, 0x10000008, 0x00200008, 0x10002000, 0x10000000, 0x00002008,
0x00000000, 0x00200008, 0x10002008, 0x00002000, 0x00202000, 0x10002008, 0x00000008, 0x10200008,
0x10200008, 0x00000000, 0x00202008, 0x10202000, 0x00002008, 0x00202000, 0x10202000, 0x10000000,
0x10002000, 0x00000008, 0x10200008, 0x00202000, 0x10202008, 0x00200000, 0x00002008, 0x10000008,
0x00200000, 0x10002000, 0x10000000, 0x00002008, 0x10000008, 0x10202008, 0x00202000, 0x10200000,
0x00202008, 0x10202000, 0x00000000, 0x10200008, 0x00000008, 0x00002000, 0x10200000, 0x00202008,
0x00002000, 0x00200008, 0x10002008, 0x00000000, 0x10202000, 0x10000000, 0x00200008, 0x10002008,
0x00100000, 0x02100001, 0x02000401, 0x00000000, 0x00000400, 0x02000401, 0x00100401, 0x02100400,
0x02100401, 0x00100000, 0x00000000, 0x02000001, 0x00000001, 0x02000000, 0x02100001, 0x00000401,
0x02000400, 0x00100401, 0x00100001, 0x02000400, 0x02000001, 0x02100000, 0x02100400, 0x00100001,
0x02100000, 0x00000400, 0x00000401, 0x02100401, 0x00100400, 0x00000001, 0x02000000, 0x00100400,
0x02000000, 0x00100400, 0x00100000, 0x02000401, 0x02000401, 0x02100001, 0x02100001, 0x00000001,
0x00100001, 0x02000000, 0x02000400, 0x00100000, 0x02100400, 0x00000401, 0x00100401, 0x02100400,
0x00000401, 0x02000001, 0x02100401, 0x02100000, 0x00100400, 0x00000000, 0x00000001, 0x02100401,
0x00000000, 0x00100401, 0x02100000, 0x00000400, 0x02000001, 0x02000400, 0x00000400, 0x00100001,
0x08000820, 0x00000800, 0x00020000, 0x08020820, 0x08000000, 0x08000820, 0x00000020, 0x08000000,
0x00020020, 0x08020000, 0x08020820, 0x00020800, 0x08020800, 0x00020820, 0x00000800, 0x00000020,
0x08020000, 0x08000020, 0x08000800, 0x00000820, 0x00020800, 0x00020020, 0x08020020, 0x08020800,
0x00000820, 0x00000000, 0x00000000, 0x08020020, 0x08000020, 0x08000800, 0x00020820, 0x00020000,
0x00020820, 0x00020000, 0x08020800, 0x00000800, 0x00000020, 0x08020020, 0x00000800, 0x00020820,
0x08000800, 0x00000020, 0x08000020, 0x08020000, 0x08020020, 0x08000000, 0x00020000, 0x08000820,
0x00000000, 0x08020820, 0x00020020, 0x08000020, 0x08020000, 0x08000800, 0x08000820, 0x00000000,
0x08020820, 0x00020800, 0x00020800, 0x00000820, 0x00000820, 0x00020020, 0x08000000, 0x08020800
};
// Permuted choice 1 table, PC-1, page 19
// Translated to zero-based format.
private static readonly byte [] PC1 = {
57-1, 49-1, 41-1, 33-1, 25-1, 17-1, 9-1,
1-1, 58-1, 50-1, 42-1, 34-1, 26-1, 18-1,
10-1, 2-1, 59-1, 51-1, 43-1, 35-1, 27-1,
19-1, 11-1, 3-1, 60-1, 52-1, 44-1, 36-1,
63-1, 55-1, 47-1, 39-1, 31-1, 23-1, 15-1,
7-1, 62-1, 54-1, 46-1, 38-1, 30-1, 22-1,
14-1, 6-1, 61-1, 53-1, 45-1, 37-1, 29-1,
21-1, 13-1, 5-1, 28-1, 20-1, 12-1, 4-1
};
/*
private static readonly byte [] leftRot = {
1, 1, 2, 2, 2, 2, 2, 2, 1, 2, 2, 2, 2, 2, 2, 1
};
*/
// pre-computed result of leftRot
private static readonly byte[] leftRotTotal = { 0x01, 0x02, 0x04, 0x06, 0x08, 0x0A, 0x0C, 0x0E, 0x0F, 0x11, 0x13, 0x15, 0x17, 0x19, 0x1B, 0x1C };
// Permuted choice 2 table, PC-2, page 21
// Translated to zero-based format.
private static readonly byte [] PC2 = {
14-1, 17-1, 11-1, 24-1, 1-1, 5-1,
3-1, 28-1, 15-1, 6-1, 21-1, 10-1,
23-1, 19-1, 12-1, 4-1, 26-1, 8-1,
16-1, 7-1, 27-1, 20-1, 13-1, 2-1,
41-1, 52-1, 31-1, 37-1, 47-1, 55-1,
30-1, 40-1, 51-1, 45-1, 33-1, 48-1,
44-1, 49-1, 39-1, 56-1, 34-1, 53-1,
46-1, 42-1, 50-1, 36-1, 29-1, 32-1
};
/*
// Initial permutation IP, page 10.
// Transposed to 0-based format.
private static readonly byte [] ipBits = {
58-1, 50-1, 42-1, 34-1, 26-1, 18-1, 10-1, 2-1,
60-1, 52-1, 44-1, 36-1, 28-1, 20-1, 12-1, 4-1,
62-1, 54-1, 46-1, 38-1, 30-1, 22-1, 14-1, 6-1,
64-1, 56-1, 48-1, 40-1, 32-1, 24-1, 16-1, 8-1,
57-1, 49-1, 41-1, 33-1, 25-1, 17-1, 9-1, 1-1,
59-1, 51-1, 43-1, 35-1, 27-1, 19-1, 11-1, 3-1,
61-1, 53-1, 45-1, 37-1, 29-1, 21-1, 13-1, 5-1,
63-1, 55-1, 47-1, 39-1, 31-1, 23-1, 15-1, 7-1
};
// Final permutation FP = IP^(-1), page 10.
// Transposed to 0-based format.
private static readonly byte [] fpBits = {
40-1, 8-1, 48-1, 16-1, 56-1, 24-1, 64-1, 32-1,
39-1, 7-1, 47-1, 15-1, 55-1, 23-1, 63-1, 31-1,
38-1, 6-1, 46-1, 14-1, 54-1, 22-1, 62-1, 30-1,
37-1, 5-1, 45-1, 13-1, 53-1, 21-1, 61-1, 29-1,
36-1, 4-1, 44-1, 12-1, 52-1, 20-1, 60-1, 28-1,
35-1, 3-1, 43-1, 11-1, 51-1, 19-1, 59-1, 27-1,
34-1, 2-1, 42-1, 10-1, 50-1, 18-1, 58-1, 26-1,
33-1, 1-1, 41-1, 9-1, 49-1, 17-1, 57-1, 25-1
};
*/
internal static readonly uint[] ipTab = {
0x00000000, 0x00000000, 0x00000100, 0x00000000, 0x00000000, 0x00000100, 0x00000100, 0x00000100,
0x00000001, 0x00000000, 0x00000101, 0x00000000, 0x00000001, 0x00000100, 0x00000101, 0x00000100,
0x00000000, 0x00000001, 0x00000100, 0x00000001, 0x00000000, 0x00000101, 0x00000100, 0x00000101,
0x00000001, 0x00000001, 0x00000101, 0x00000001, 0x00000001, 0x00000101, 0x00000101, 0x00000101,
0x00000000, 0x00000000, 0x01000000, 0x00000000, 0x00000000, 0x01000000, 0x01000000, 0x01000000,
0x00010000, 0x00000000, 0x01010000, 0x00000000, 0x00010000, 0x01000000, 0x01010000, 0x01000000,
0x00000000, 0x00010000, 0x01000000, 0x00010000, 0x00000000, 0x01010000, 0x01000000, 0x01010000,
0x00010000, 0x00010000, 0x01010000, 0x00010000, 0x00010000, 0x01010000, 0x01010000, 0x01010000,
0x00000000, 0x00000000, 0x00000200, 0x00000000, 0x00000000, 0x00000200, 0x00000200, 0x00000200,
0x00000002, 0x00000000, 0x00000202, 0x00000000, 0x00000002, 0x00000200, 0x00000202, 0x00000200,
0x00000000, 0x00000002, 0x00000200, 0x00000002, 0x00000000, 0x00000202, 0x00000200, 0x00000202,
0x00000002, 0x00000002, 0x00000202, 0x00000002, 0x00000002, 0x00000202, 0x00000202, 0x00000202,
0x00000000, 0x00000000, 0x02000000, 0x00000000, 0x00000000, 0x02000000, 0x02000000, 0x02000000,
0x00020000, 0x00000000, 0x02020000, 0x00000000, 0x00020000, 0x02000000, 0x02020000, 0x02000000,
0x00000000, 0x00020000, 0x02000000, 0x00020000, 0x00000000, 0x02020000, 0x02000000, 0x02020000,
0x00020000, 0x00020000, 0x02020000, 0x00020000, 0x00020000, 0x02020000, 0x02020000, 0x02020000,
0x00000000, 0x00000000, 0x00000400, 0x00000000, 0x00000000, 0x00000400, 0x00000400, 0x00000400,
0x00000004, 0x00000000, 0x00000404, 0x00000000, 0x00000004, 0x00000400, 0x00000404, 0x00000400,
0x00000000, 0x00000004, 0x00000400, 0x00000004, 0x00000000, 0x00000404, 0x00000400, 0x00000404,
0x00000004, 0x00000004, 0x00000404, 0x00000004, 0x00000004, 0x00000404, 0x00000404, 0x00000404,
0x00000000, 0x00000000, 0x04000000, 0x00000000, 0x00000000, 0x04000000, 0x04000000, 0x04000000,
0x00040000, 0x00000000, 0x04040000, 0x00000000, 0x00040000, 0x04000000, 0x04040000, 0x04000000,
0x00000000, 0x00040000, 0x04000000, 0x00040000, 0x00000000, 0x04040000, 0x04000000, 0x04040000,
0x00040000, 0x00040000, 0x04040000, 0x00040000, 0x00040000, 0x04040000, 0x04040000, 0x04040000,
0x00000000, 0x00000000, 0x00000800, 0x00000000, 0x00000000, 0x00000800, 0x00000800, 0x00000800,
0x00000008, 0x00000000, 0x00000808, 0x00000000, 0x00000008, 0x00000800, 0x00000808, 0x00000800,
0x00000000, 0x00000008, 0x00000800, 0x00000008, 0x00000000, 0x00000808, 0x00000800, 0x00000808,
0x00000008, 0x00000008, 0x00000808, 0x00000008, 0x00000008, 0x00000808, 0x00000808, 0x00000808,
0x00000000, 0x00000000, 0x08000000, 0x00000000, 0x00000000, 0x08000000, 0x08000000, 0x08000000,
0x00080000, 0x00000000, 0x08080000, 0x00000000, 0x00080000, 0x08000000, 0x08080000, 0x08000000,
0x00000000, 0x00080000, 0x08000000, 0x00080000, 0x00000000, 0x08080000, 0x08000000, 0x08080000,
0x00080000, 0x00080000, 0x08080000, 0x00080000, 0x00080000, 0x08080000, 0x08080000, 0x08080000,
0x00000000, 0x00000000, 0x00001000, 0x00000000, 0x00000000, 0x00001000, 0x00001000, 0x00001000,
0x00000010, 0x00000000, 0x00001010, 0x00000000, 0x00000010, 0x00001000, 0x00001010, 0x00001000,
0x00000000, 0x00000010, 0x00001000, 0x00000010, 0x00000000, 0x00001010, 0x00001000, 0x00001010,
0x00000010, 0x00000010, 0x00001010, 0x00000010, 0x00000010, 0x00001010, 0x00001010, 0x00001010,
0x00000000, 0x00000000, 0x10000000, 0x00000000, 0x00000000, 0x10000000, 0x10000000, 0x10000000,
0x00100000, 0x00000000, 0x10100000, 0x00000000, 0x00100000, 0x10000000, 0x10100000, 0x10000000,
0x00000000, 0x00100000, 0x10000000, 0x00100000, 0x00000000, 0x10100000, 0x10000000, 0x10100000,
0x00100000, 0x00100000, 0x10100000, 0x00100000, 0x00100000, 0x10100000, 0x10100000, 0x10100000,
0x00000000, 0x00000000, 0x00002000, 0x00000000, 0x00000000, 0x00002000, 0x00002000, 0x00002000,
0x00000020, 0x00000000, 0x00002020, 0x00000000, 0x00000020, 0x00002000, 0x00002020, 0x00002000,
0x00000000, 0x00000020, 0x00002000, 0x00000020, 0x00000000, 0x00002020, 0x00002000, 0x00002020,
0x00000020, 0x00000020, 0x00002020, 0x00000020, 0x00000020, 0x00002020, 0x00002020, 0x00002020,
0x00000000, 0x00000000, 0x20000000, 0x00000000, 0x00000000, 0x20000000, 0x20000000, 0x20000000,
0x00200000, 0x00000000, 0x20200000, 0x00000000, 0x00200000, 0x20000000, 0x20200000, 0x20000000,
0x00000000, 0x00200000, 0x20000000, 0x00200000, 0x00000000, 0x20200000, 0x20000000, 0x20200000,
0x00200000, 0x00200000, 0x20200000, 0x00200000, 0x00200000, 0x20200000, 0x20200000, 0x20200000,
0x00000000, 0x00000000, 0x00004000, 0x00000000, 0x00000000, 0x00004000, 0x00004000, 0x00004000,
0x00000040, 0x00000000, 0x00004040, 0x00000000, 0x00000040, 0x00004000, 0x00004040, 0x00004000,
0x00000000, 0x00000040, 0x00004000, 0x00000040, 0x00000000, 0x00004040, 0x00004000, 0x00004040,
0x00000040, 0x00000040, 0x00004040, 0x00000040, 0x00000040, 0x00004040, 0x00004040, 0x00004040,
0x00000000, 0x00000000, 0x40000000, 0x00000000, 0x00000000, 0x40000000, 0x40000000, 0x40000000,
0x00400000, 0x00000000, 0x40400000, 0x00000000, 0x00400000, 0x40000000, 0x40400000, 0x40000000,
0x00000000, 0x00400000, 0x40000000, 0x00400000, 0x00000000, 0x40400000, 0x40000000, 0x40400000,
0x00400000, 0x00400000, 0x40400000, 0x00400000, 0x00400000, 0x40400000, 0x40400000, 0x40400000,
0x00000000, 0x00000000, 0x00008000, 0x00000000, 0x00000000, 0x00008000, 0x00008000, 0x00008000,
0x00000080, 0x00000000, 0x00008080, 0x00000000, 0x00000080, 0x00008000, 0x00008080, 0x00008000,
0x00000000, 0x00000080, 0x00008000, 0x00000080, 0x00000000, 0x00008080, 0x00008000, 0x00008080,
0x00000080, 0x00000080, 0x00008080, 0x00000080, 0x00000080, 0x00008080, 0x00008080, 0x00008080,
0x00000000, 0x00000000, 0x80000000, 0x00000000, 0x00000000, 0x80000000, 0x80000000, 0x80000000,
0x00800000, 0x00000000, 0x80800000, 0x00000000, 0x00800000, 0x80000000, 0x80800000, 0x80000000,
0x00000000, 0x00800000, 0x80000000, 0x00800000, 0x00000000, 0x80800000, 0x80000000, 0x80800000,
0x00800000, 0x00800000, 0x80800000, 0x00800000, 0x00800000, 0x80800000, 0x80800000, 0x80800000
};
internal static readonly uint[] fpTab = {
0x00000000, 0x00000000, 0x00000000, 0x00000040, 0x00000000, 0x00004000, 0x00000000, 0x00004040,
0x00000000, 0x00400000, 0x00000000, 0x00400040, 0x00000000, 0x00404000, 0x00000000, 0x00404040,
0x00000000, 0x40000000, 0x00000000, 0x40000040, 0x00000000, 0x40004000, 0x00000000, 0x40004040,
0x00000000, 0x40400000, 0x00000000, 0x40400040, 0x00000000, 0x40404000, 0x00000000, 0x40404040,
0x00000000, 0x00000000, 0x00000040, 0x00000000, 0x00004000, 0x00000000, 0x00004040, 0x00000000,
0x00400000, 0x00000000, 0x00400040, 0x00000000, 0x00404000, 0x00000000, 0x00404040, 0x00000000,
0x40000000, 0x00000000, 0x40000040, 0x00000000, 0x40004000, 0x00000000, 0x40004040, 0x00000000,
0x40400000, 0x00000000, 0x40400040, 0x00000000, 0x40404000, 0x00000000, 0x40404040, 0x00000000,
0x00000000, 0x00000000, 0x00000000, 0x00000010, 0x00000000, 0x00001000, 0x00000000, 0x00001010,
0x00000000, 0x00100000, 0x00000000, 0x00100010, 0x00000000, 0x00101000, 0x00000000, 0x00101010,
0x00000000, 0x10000000, 0x00000000, 0x10000010, 0x00000000, 0x10001000, 0x00000000, 0x10001010,
0x00000000, 0x10100000, 0x00000000, 0x10100010, 0x00000000, 0x10101000, 0x00000000, 0x10101010,
0x00000000, 0x00000000, 0x00000010, 0x00000000, 0x00001000, 0x00000000, 0x00001010, 0x00000000,
0x00100000, 0x00000000, 0x00100010, 0x00000000, 0x00101000, 0x00000000, 0x00101010, 0x00000000,
0x10000000, 0x00000000, 0x10000010, 0x00000000, 0x10001000, 0x00000000, 0x10001010, 0x00000000,
0x10100000, 0x00000000, 0x10100010, 0x00000000, 0x10101000, 0x00000000, 0x10101010, 0x00000000,
0x00000000, 0x00000000, 0x00000000, 0x00000004, 0x00000000, 0x00000400, 0x00000000, 0x00000404,
0x00000000, 0x00040000, 0x00000000, 0x00040004, 0x00000000, 0x00040400, 0x00000000, 0x00040404,
0x00000000, 0x04000000, 0x00000000, 0x04000004, 0x00000000, 0x04000400, 0x00000000, 0x04000404,
0x00000000, 0x04040000, 0x00000000, 0x04040004, 0x00000000, 0x04040400, 0x00000000, 0x04040404,
0x00000000, 0x00000000, 0x00000004, 0x00000000, 0x00000400, 0x00000000, 0x00000404, 0x00000000,
0x00040000, 0x00000000, 0x00040004, 0x00000000, 0x00040400, 0x00000000, 0x00040404, 0x00000000,
0x04000000, 0x00000000, 0x04000004, 0x00000000, 0x04000400, 0x00000000, 0x04000404, 0x00000000,
0x04040000, 0x00000000, 0x04040004, 0x00000000, 0x04040400, 0x00000000, 0x04040404, 0x00000000,
0x00000000, 0x00000000, 0x00000000, 0x00000001, 0x00000000, 0x00000100, 0x00000000, 0x00000101,
0x00000000, 0x00010000, 0x00000000, 0x00010001, 0x00000000, 0x00010100, 0x00000000, 0x00010101,
0x00000000, 0x01000000, 0x00000000, 0x01000001, 0x00000000, 0x01000100, 0x00000000, 0x01000101,
0x00000000, 0x01010000, 0x00000000, 0x01010001, 0x00000000, 0x01010100, 0x00000000, 0x01010101,
0x00000000, 0x00000000, 0x00000001, 0x00000000, 0x00000100, 0x00000000, 0x00000101, 0x00000000,
0x00010000, 0x00000000, 0x00010001, 0x00000000, 0x00010100, 0x00000000, 0x00010101, 0x00000000,
0x01000000, 0x00000000, 0x01000001, 0x00000000, 0x01000100, 0x00000000, 0x01000101, 0x00000000,
0x01010000, 0x00000000, 0x01010001, 0x00000000, 0x01010100, 0x00000000, 0x01010101, 0x00000000,
0x00000000, 0x00000000, 0x00000000, 0x00000080, 0x00000000, 0x00008000, 0x00000000, 0x00008080,
0x00000000, 0x00800000, 0x00000000, 0x00800080, 0x00000000, 0x00808000, 0x00000000, 0x00808080,
0x00000000, 0x80000000, 0x00000000, 0x80000080, 0x00000000, 0x80008000, 0x00000000, 0x80008080,
0x00000000, 0x80800000, 0x00000000, 0x80800080, 0x00000000, 0x80808000, 0x00000000, 0x80808080,
0x00000000, 0x00000000, 0x00000080, 0x00000000, 0x00008000, 0x00000000, 0x00008080, 0x00000000,
0x00800000, 0x00000000, 0x00800080, 0x00000000, 0x00808000, 0x00000000, 0x00808080, 0x00000000,
0x80000000, 0x00000000, 0x80000080, 0x00000000, 0x80008000, 0x00000000, 0x80008080, 0x00000000,
0x80800000, 0x00000000, 0x80800080, 0x00000000, 0x80808000, 0x00000000, 0x80808080, 0x00000000,
0x00000000, 0x00000000, 0x00000000, 0x00000020, 0x00000000, 0x00002000, 0x00000000, 0x00002020,
0x00000000, 0x00200000, 0x00000000, 0x00200020, 0x00000000, 0x00202000, 0x00000000, 0x00202020,
0x00000000, 0x20000000, 0x00000000, 0x20000020, 0x00000000, 0x20002000, 0x00000000, 0x20002020,
0x00000000, 0x20200000, 0x00000000, 0x20200020, 0x00000000, 0x20202000, 0x00000000, 0x20202020,
0x00000000, 0x00000000, 0x00000020, 0x00000000, 0x00002000, 0x00000000, 0x00002020, 0x00000000,
0x00200000, 0x00000000, 0x00200020, 0x00000000, 0x00202000, 0x00000000, 0x00202020, 0x00000000,
0x20000000, 0x00000000, 0x20000020, 0x00000000, 0x20002000, 0x00000000, 0x20002020, 0x00000000,
0x20200000, 0x00000000, 0x20200020, 0x00000000, 0x20202000, 0x00000000, 0x20202020, 0x00000000,
0x00000000, 0x00000000, 0x00000000, 0x00000008, 0x00000000, 0x00000800, 0x00000000, 0x00000808,
0x00000000, 0x00080000, 0x00000000, 0x00080008, 0x00000000, 0x00080800, 0x00000000, 0x00080808,
0x00000000, 0x08000000, 0x00000000, 0x08000008, 0x00000000, 0x08000800, 0x00000000, 0x08000808,
0x00000000, 0x08080000, 0x00000000, 0x08080008, 0x00000000, 0x08080800, 0x00000000, 0x08080808,
0x00000000, 0x00000000, 0x00000008, 0x00000000, 0x00000800, 0x00000000, 0x00000808, 0x00000000,
0x00080000, 0x00000000, 0x00080008, 0x00000000, 0x00080800, 0x00000000, 0x00080808, 0x00000000,
0x08000000, 0x00000000, 0x08000008, 0x00000000, 0x08000800, 0x00000000, 0x08000808, 0x00000000,
0x08080000, 0x00000000, 0x08080008, 0x00000000, 0x08080800, 0x00000000, 0x08080808, 0x00000000,
0x00000000, 0x00000000, 0x00000000, 0x00000002, 0x00000000, 0x00000200, 0x00000000, 0x00000202,
0x00000000, 0x00020000, 0x00000000, 0x00020002, 0x00000000, 0x00020200, 0x00000000, 0x00020202,
0x00000000, 0x02000000, 0x00000000, 0x02000002, 0x00000000, 0x02000200, 0x00000000, 0x02000202,
0x00000000, 0x02020000, 0x00000000, 0x02020002, 0x00000000, 0x02020200, 0x00000000, 0x02020202,
0x00000000, 0x00000000, 0x00000002, 0x00000000, 0x00000200, 0x00000000, 0x00000202, 0x00000000,
0x00020000, 0x00000000, 0x00020002, 0x00000000, 0x00020200, 0x00000000, 0x00020202, 0x00000000,
0x02000000, 0x00000000, 0x02000002, 0x00000000, 0x02000200, 0x00000000, 0x02000202, 0x00000000,
0x02020000, 0x00000000, 0x02020002, 0x00000000, 0x02020200, 0x00000000, 0x02020202, 0x00000000
};
/* static DESTransform ()
{
spBoxes = new uint [64 * 8];
int [] pBox = new int [32];
for (int p = 0; p < 32; p++) {
for (int i = 0; i < 32; i++) {
if (p == pTab [i]) {
pBox [p] = i;
break;
}
}
}
for (int s = 0; s < 8; s++) { // for each S-box
int sOff = s << 6;
for (int i = 0; i < 64; i++) { // inputs
uint sp=0;
int indx = (i & 0x20) | ((i & 1) << 4) | ((i >> 1) & 0xF);
for (int j = 0; j < 4; j++) { // for each bit in the output
if ((sBoxes [sOff + indx] & (8 >> j)) != 0) {
sp |= (uint) (1 << (31 - pBox [(s << 2) + j]));
}
}
spBoxes [sOff + i] = sp;
}
}
leftRotTotal = new byte [leftRot.Length];
for (int i = 0; i < leftRot.Length; i++) {
int r = 0;
for (int j = 0; j <= i; r += leftRot [j++]) {
// no statement (confuse the compiler == warning)
}
leftRotTotal [i] = (byte) r;
}
InitPermutationTable (ipBits, out ipTab);
InitPermutationTable (fpBits, out fpTab);
}
*/
// Default constructor.
internal DESTransform (SymmetricAlgorithm symmAlgo, bool encryption, byte[] key, byte[] iv)
: base (symmAlgo, encryption, iv)
{
byte[] clonedKey = null;
if (key == null) {
key = GetStrongKey ();
clonedKey = key; // no need to clone
}
// note: checking (semi-)weak keys also checks valid key length
if (DES.IsWeakKey (key) || DES.IsSemiWeakKey (key)) {
string msg = Locale.GetText ("This is a known weak, or semi-weak, key.");
throw new CryptographicException (msg);
}
if (clonedKey == null)
clonedKey = (byte[]) key.Clone ();
keySchedule = new byte [KEY_BYTE_SIZE * 16];
byteBuff = new byte [BLOCK_BYTE_SIZE];
dwordBuff = new uint [BLOCK_BYTE_SIZE / 4];
SetKey (clonedKey);
}
/* Permutation Tables are now precomputed.
private static void InitPermutationTable (byte[] pBits, out int[] permTab)
{
permTab = new int [8*2 * 8*2 * (64/32)];
for (int i = 0; i < 16; i++) {
for (int j = 0; j < 16; j++) {
int offs = (i << 5) + (j << 1);
for (int n = 0; n < 64; n++) {
int bitNum = (int) pBits [n];
if ((bitNum >> 2 == i) &&
0 != (j & (8 >> (bitNum & 3)))) {
permTab [offs + (n >> (3+2))] |= (int) ((0x80808080 & (0xFF << (n & (3 << 3)))) >> (n & 7));
}
}
}
}
}
*/
private uint CipherFunct (uint r, int n)
{
uint res = 0;
byte[] subkey = keySchedule;
int i = n << 3;
uint rt = (r >> 1) | (r << 31); // ROR32(r)
res |= spBoxes [0*64 + (((rt >> 26) ^ subkey [i++]) & 0x3F)];
res |= spBoxes [1*64 + (((rt >> 22) ^ subkey [i++]) & 0x3F)];
res |= spBoxes [2*64 + (((rt >> 18) ^ subkey [i++]) & 0x3F)];
res |= spBoxes [3*64 + (((rt >> 14) ^ subkey [i++]) & 0x3F)];
res |= spBoxes [4*64 + (((rt >> 10) ^ subkey [i++]) & 0x3F)];
res |= spBoxes [5*64 + (((rt >> 6) ^ subkey [i++]) & 0x3F)];
res |= spBoxes [6*64 + (((rt >> 2) ^ subkey [i++]) & 0x3F)];
rt = (r << 1) | (r >> 31); // ROL32(r)
res |= spBoxes [7*64 + ((rt ^ subkey [i]) & 0x3F)];
return res;
}
internal static void Permutation (byte[] input, byte[] output, uint[] permTab, bool preSwap)
{
if (preSwap && BitConverter.IsLittleEndian)
BSwap (input);
int offs1 = (((int)(input [0]) >> 4)) << 1;
int offs2 = (1 << 5) + ((((int)input [0]) & 0xF) << 1);
uint d1 = permTab [offs1++] | permTab [offs2++];
uint d2 = permTab [offs1] | permTab [offs2];
int max = BLOCK_BYTE_SIZE << 1;
for (int i = 2, indx = 1; i < max; i += 2, indx++) {
int ii = (int) input [indx];
offs1 = (i << 5) + ((ii >> 4) << 1);
offs2 = ((i + 1) << 5) + ((ii & 0xF) << 1);
d1 |= permTab [offs1++] | permTab [offs2++];
d2 |= permTab [offs1] | permTab [offs2];
}
if (preSwap || !BitConverter.IsLittleEndian) {
output [0] = (byte) (d1);
output [1] = (byte) (d1 >> 8);
output [2] = (byte) (d1 >> 16);
output [3] = (byte) (d1 >> 24);
output [4] = (byte) (d2);
output [5] = (byte) (d2 >> 8);
output [6] = (byte) (d2 >> 16);
output [7] = (byte) (d2 >> 24);
}
else {
output [0] = (byte) (d1 >> 24);
output [1] = (byte) (d1 >> 16);
output [2] = (byte) (d1 >> 8);
output [3] = (byte) (d1);
output [4] = (byte) (d2 >> 24);
output [5] = (byte) (d2 >> 16);
output [6] = (byte) (d2 >> 8);
output [7] = (byte) (d2);
}
}
private static void BSwap (byte [] byteBuff)
{
byte t = byteBuff [0];
byteBuff [0] = byteBuff [3];
byteBuff [3] = t;
t = byteBuff [1];
byteBuff [1] = byteBuff [2];
byteBuff [2] = t;
t = byteBuff [4];
byteBuff [4] = byteBuff [7];
byteBuff [7] = t;
t = byteBuff [5];
byteBuff [5] = byteBuff [6];
byteBuff [6] = t;
}
internal void SetKey (byte[] key)
{
// NOTE: see Fig. 3, Key schedule calculation, at page 20.
Array.Clear (keySchedule, 0, keySchedule.Length);
int keyBitSize = PC1.Length;
byte[] keyPC1 = new byte [keyBitSize]; // PC1-permuted key
byte[] keyRot = new byte [keyBitSize]; // PC1 & rotated
int indx = 0;
foreach (byte bitPos in PC1) {
keyPC1 [indx++] = (byte)((key [(int)bitPos >> 3] >> (7 ^ (bitPos & 7))) & 1);
}
int j;
for (int i = 0; i < KEY_BYTE_SIZE*2; i++) {
int b = keyBitSize >> 1;
for (j = 0; j < b; j++) {
int s = j + (int) leftRotTotal [i];
keyRot [j] = keyPC1 [s < b ? s : s - b];
}
for (j = b; j < keyBitSize; j++) {
int s = j + (int) leftRotTotal [i];
keyRot [j] = keyPC1 [s < keyBitSize ? s : s - b];
}
int keyOffs = i * KEY_BYTE_SIZE;
j = 0;
foreach (byte bitPos in PC2) {
if (keyRot [(int)bitPos] != 0) {
keySchedule [keyOffs + (j/6)] |= (byte) (0x80 >> ((j % 6) + 2));
}
j++;
}
}
}
// public helper for TripleDES
public void ProcessBlock (byte[] input, byte[] output)
{
Buffer.BlockCopy (input, 0, dwordBuff, 0, BLOCK_BYTE_SIZE);
if (encrypt) {
uint d0 = dwordBuff [0];
uint d1 = dwordBuff [1];
// 16 rounds
d0 ^= CipherFunct (d1, 0);
d1 ^= CipherFunct (d0, 1);
d0 ^= CipherFunct (d1, 2);
d1 ^= CipherFunct (d0, 3);
d0 ^= CipherFunct (d1, 4);
d1 ^= CipherFunct (d0, 5);
d0 ^= CipherFunct (d1, 6);
d1 ^= CipherFunct (d0, 7);
d0 ^= CipherFunct (d1, 8);
d1 ^= CipherFunct (d0, 9);
d0 ^= CipherFunct (d1, 10);
d1 ^= CipherFunct (d0, 11);
d0 ^= CipherFunct (d1, 12);
d1 ^= CipherFunct (d0, 13);
d0 ^= CipherFunct (d1, 14);
d1 ^= CipherFunct (d0, 15);
dwordBuff [0] = d1;
dwordBuff [1] = d0;
}
else {
uint d1 = dwordBuff [0];
uint d0 = dwordBuff [1];
// 16 rounds in reverse order
d1 ^= CipherFunct (d0, 15);
d0 ^= CipherFunct (d1, 14);
d1 ^= CipherFunct (d0, 13);
d0 ^= CipherFunct (d1, 12);
d1 ^= CipherFunct (d0, 11);
d0 ^= CipherFunct (d1, 10);
d1 ^= CipherFunct (d0, 9);
d0 ^= CipherFunct (d1, 8);
d1 ^= CipherFunct (d0, 7);
d0 ^= CipherFunct (d1, 6);
d1 ^= CipherFunct (d0, 5);
d0 ^= CipherFunct (d1, 4);
d1 ^= CipherFunct (d0, 3);
d0 ^= CipherFunct (d1, 2);
d1 ^= CipherFunct (d0, 1);
d0 ^= CipherFunct (d1, 0);
dwordBuff [0] = d0;
dwordBuff [1] = d1;
}
Buffer.BlockCopy (dwordBuff, 0, output, 0, BLOCK_BYTE_SIZE);
}
protected override void ECB (byte[] input, byte[] output)
{
Permutation (input, output, ipTab, false);
ProcessBlock (output, byteBuff);
Permutation (byteBuff, output, fpTab, true);
}
static internal byte[] GetStrongKey ()
{
byte[] key = KeyBuilder.Key (DESTransform.KEY_BYTE_SIZE);
while (DES.IsWeakKey (key) || DES.IsSemiWeakKey (key))
key = KeyBuilder.Key (DESTransform.KEY_BYTE_SIZE);
return key;
}
}
[ComVisible (true)]
public sealed class DESCryptoServiceProvider : DES {
public DESCryptoServiceProvider ()
{
}
public override ICryptoTransform CreateDecryptor (byte[] rgbKey, byte[] rgbIV)
{
return new DESTransform (this, false, rgbKey, rgbIV);
}
public override ICryptoTransform CreateEncryptor (byte[] rgbKey, byte[] rgbIV)
{
return new DESTransform (this, true, rgbKey, rgbIV);
}
public override void GenerateIV ()
{
IVValue = KeyBuilder.IV (DESTransform.BLOCK_BYTE_SIZE);
}
public override void GenerateKey ()
{
KeyValue = DESTransform.GetStrongKey ();
}
}
}
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