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MscFireLander/Assets/Plugins/Best HTTP/Source/SecureProtocol/crypto/engines/RijndaelEngine.cs

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#if !BESTHTTP_DISABLE_ALTERNATE_SSL && (!UNITY_WEBGL || UNITY_EDITOR)
#pragma warning disable
using System;
#if UNITY_WSA && !UNITY_EDITOR && !ENABLE_IL2CPP
using System.TypeFix;
#endif
using BestHTTP.SecureProtocol.Org.BouncyCastle.Crypto.Parameters;
using BestHTTP.SecureProtocol.Org.BouncyCastle.Utilities;
namespace BestHTTP.SecureProtocol.Org.BouncyCastle.Crypto.Engines
{
/**
* an implementation of Rijndael, based on the documentation and reference implementation
* by Paulo Barreto, Vincent Rijmen, for v2.0 August '99.
* <p>
* Note: this implementation is based on information prior to readonly NIST publication.
* </p>
*/
public class RijndaelEngine
: IBlockCipher
{
private static readonly int MAXROUNDS = 14;
private static readonly int MAXKC = (256/4);
private static readonly byte[] Logtable =
{
0, 0, 25, 1, 50, 2, 26, 198,
75, 199, 27, 104, 51, 238, 223, 3,
100, 4, 224, 14, 52, 141, 129, 239,
76, 113, 8, 200, 248, 105, 28, 193,
125, 194, 29, 181, 249, 185, 39, 106,
77, 228, 166, 114, 154, 201, 9, 120,
101, 47, 138, 5, 33, 15, 225, 36,
18, 240, 130, 69, 53, 147, 218, 142,
150, 143, 219, 189, 54, 208, 206, 148,
19, 92, 210, 241, 64, 70, 131, 56,
102, 221, 253, 48, 191, 6, 139, 98,
179, 37, 226, 152, 34, 136, 145, 16,
126, 110, 72, 195, 163, 182, 30, 66,
58, 107, 40, 84, 250, 133, 61, 186,
43, 121, 10, 21, 155, 159, 94, 202,
78, 212, 172, 229, 243, 115, 167, 87,
175, 88, 168, 80, 244, 234, 214, 116,
79, 174, 233, 213, 231, 230, 173, 232,
44, 215, 117, 122, 235, 22, 11, 245,
89, 203, 95, 176, 156, 169, 81, 160,
127, 12, 246, 111, 23, 196, 73, 236,
216, 67, 31, 45, 164, 118, 123, 183,
204, 187, 62, 90, 251, 96, 177, 134,
59, 82, 161, 108, 170, 85, 41, 157,
151, 178, 135, 144, 97, 190, 220, 252,
188, 149, 207, 205, 55, 63, 91, 209,
83, 57, 132, 60, 65, 162, 109, 71,
20, 42, 158, 93, 86, 242, 211, 171,
68, 17, 146, 217, 35, 32, 46, 137,
180, 124, 184, 38, 119, 153, 227, 165,
103, 74, 237, 222, 197, 49, 254, 24,
13, 99, 140, 128, 192, 247, 112, 7
};
private static readonly byte[] Alogtable =
{
0, 3, 5, 15, 17, 51, 85, 255, 26, 46, 114, 150, 161, 248, 19, 53,
95, 225, 56, 72, 216, 115, 149, 164, 247, 2, 6, 10, 30, 34, 102, 170,
229, 52, 92, 228, 55, 89, 235, 38, 106, 190, 217, 112, 144, 171, 230, 49,
83, 245, 4, 12, 20, 60, 68, 204, 79, 209, 104, 184, 211, 110, 178, 205,
76, 212, 103, 169, 224, 59, 77, 215, 98, 166, 241, 8, 24, 40, 120, 136,
131, 158, 185, 208, 107, 189, 220, 127, 129, 152, 179, 206, 73, 219, 118, 154,
181, 196, 87, 249, 16, 48, 80, 240, 11, 29, 39, 105, 187, 214, 97, 163,
254, 25, 43, 125, 135, 146, 173, 236, 47, 113, 147, 174, 233, 32, 96, 160,
251, 22, 58, 78, 210, 109, 183, 194, 93, 231, 50, 86, 250, 21, 63, 65,
195, 94, 226, 61, 71, 201, 64, 192, 91, 237, 44, 116, 156, 191, 218, 117,
159, 186, 213, 100, 172, 239, 42, 126, 130, 157, 188, 223, 122, 142, 137, 128,
155, 182, 193, 88, 232, 35, 101, 175, 234, 37, 111, 177, 200, 67, 197, 84,
252, 31, 33, 99, 165, 244, 7, 9, 27, 45, 119, 153, 176, 203, 70, 202,
69, 207, 74, 222, 121, 139, 134, 145, 168, 227, 62, 66, 198, 81, 243, 14,
18, 54, 90, 238, 41, 123, 141, 140, 143, 138, 133, 148, 167, 242, 13, 23,
57, 75, 221, 124, 132, 151, 162, 253, 28, 36, 108, 180, 199, 82, 246, 1,
3, 5, 15, 17, 51, 85, 255, 26, 46, 114, 150, 161, 248, 19, 53,
95, 225, 56, 72, 216, 115, 149, 164, 247, 2, 6, 10, 30, 34, 102, 170,
229, 52, 92, 228, 55, 89, 235, 38, 106, 190, 217, 112, 144, 171, 230, 49,
83, 245, 4, 12, 20, 60, 68, 204, 79, 209, 104, 184, 211, 110, 178, 205,
76, 212, 103, 169, 224, 59, 77, 215, 98, 166, 241, 8, 24, 40, 120, 136,
131, 158, 185, 208, 107, 189, 220, 127, 129, 152, 179, 206, 73, 219, 118, 154,
181, 196, 87, 249, 16, 48, 80, 240, 11, 29, 39, 105, 187, 214, 97, 163,
254, 25, 43, 125, 135, 146, 173, 236, 47, 113, 147, 174, 233, 32, 96, 160,
251, 22, 58, 78, 210, 109, 183, 194, 93, 231, 50, 86, 250, 21, 63, 65,
195, 94, 226, 61, 71, 201, 64, 192, 91, 237, 44, 116, 156, 191, 218, 117,
159, 186, 213, 100, 172, 239, 42, 126, 130, 157, 188, 223, 122, 142, 137, 128,
155, 182, 193, 88, 232, 35, 101, 175, 234, 37, 111, 177, 200, 67, 197, 84,
252, 31, 33, 99, 165, 244, 7, 9, 27, 45, 119, 153, 176, 203, 70, 202,
69, 207, 74, 222, 121, 139, 134, 145, 168, 227, 62, 66, 198, 81, 243, 14,
18, 54, 90, 238, 41, 123, 141, 140, 143, 138, 133, 148, 167, 242, 13, 23,
57, 75, 221, 124, 132, 151, 162, 253, 28, 36, 108, 180, 199, 82, 246, 1,
};
private static readonly byte[] S =
{
99, 124, 119, 123, 242, 107, 111, 197, 48, 1, 103, 43, 254, 215, 171, 118,
202, 130, 201, 125, 250, 89, 71, 240, 173, 212, 162, 175, 156, 164, 114, 192,
183, 253, 147, 38, 54, 63, 247, 204, 52, 165, 229, 241, 113, 216, 49, 21,
4, 199, 35, 195, 24, 150, 5, 154, 7, 18, 128, 226, 235, 39, 178, 117,
9, 131, 44, 26, 27, 110, 90, 160, 82, 59, 214, 179, 41, 227, 47, 132,
83, 209, 0, 237, 32, 252, 177, 91, 106, 203, 190, 57, 74, 76, 88, 207,
208, 239, 170, 251, 67, 77, 51, 133, 69, 249, 2, 127, 80, 60, 159, 168,
81, 163, 64, 143, 146, 157, 56, 245, 188, 182, 218, 33, 16, 255, 243, 210,
205, 12, 19, 236, 95, 151, 68, 23, 196, 167, 126, 61, 100, 93, 25, 115,
96, 129, 79, 220, 34, 42, 144, 136, 70, 238, 184, 20, 222, 94, 11, 219,
224, 50, 58, 10, 73, 6, 36, 92, 194, 211, 172, 98, 145, 149, 228, 121,
231, 200, 55, 109, 141, 213, 78, 169, 108, 86, 244, 234, 101, 122, 174, 8,
186, 120, 37, 46, 28, 166, 180, 198, 232, 221, 116, 31, 75, 189, 139, 138,
112, 62, 181, 102, 72, 3, 246, 14, 97, 53, 87, 185, 134, 193, 29, 158,
225, 248, 152, 17, 105, 217, 142, 148, 155, 30, 135, 233, 206, 85, 40, 223,
140, 161, 137, 13, 191, 230, 66, 104, 65, 153, 45, 15, 176, 84, 187, 22,
};
private static readonly byte[] Si =
{
82, 9, 106, 213, 48, 54, 165, 56, 191, 64, 163, 158, 129, 243, 215, 251,
124, 227, 57, 130, 155, 47, 255, 135, 52, 142, 67, 68, 196, 222, 233, 203,
84, 123, 148, 50, 166, 194, 35, 61, 238, 76, 149, 11, 66, 250, 195, 78,
8, 46, 161, 102, 40, 217, 36, 178, 118, 91, 162, 73, 109, 139, 209, 37,
114, 248, 246, 100, 134, 104, 152, 22, 212, 164, 92, 204, 93, 101, 182, 146,
108, 112, 72, 80, 253, 237, 185, 218, 94, 21, 70, 87, 167, 141, 157, 132,
144, 216, 171, 0, 140, 188, 211, 10, 247, 228, 88, 5, 184, 179, 69, 6,
208, 44, 30, 143, 202, 63, 15, 2, 193, 175, 189, 3, 1, 19, 138, 107,
58, 145, 17, 65, 79, 103, 220, 234, 151, 242, 207, 206, 240, 180, 230, 115,
150, 172, 116, 34, 231, 173, 53, 133, 226, 249, 55, 232, 28, 117, 223, 110,
71, 241, 26, 113, 29, 41, 197, 137, 111, 183, 98, 14, 170, 24, 190, 27,
252, 86, 62, 75, 198, 210, 121, 32, 154, 219, 192, 254, 120, 205, 90, 244,
31, 221, 168, 51, 136, 7, 199, 49, 177, 18, 16, 89, 39, 128, 236, 95,
96, 81, 127, 169, 25, 181, 74, 13, 45, 229, 122, 159, 147, 201, 156, 239,
160, 224, 59, 77, 174, 42, 245, 176, 200, 235, 187, 60, 131, 83, 153, 97,
23, 43, 4, 126, 186, 119, 214, 38, 225, 105, 20, 99, 85, 33, 12, 125,
};
private static readonly byte[] rcon =
{
0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36, 0x6c, 0xd8, 0xab, 0x4d, 0x9a,
0x2f, 0x5e, 0xbc, 0x63, 0xc6, 0x97, 0x35, 0x6a, 0xd4, 0xb3, 0x7d, 0xfa, 0xef, 0xc5, 0x91
};
static readonly byte[][] shifts0 = new byte [][]
{
new byte[]{ 0, 8, 16, 24 },
new byte[]{ 0, 8, 16, 24 },
new byte[]{ 0, 8, 16, 24 },
new byte[]{ 0, 8, 16, 32 },
new byte[]{ 0, 8, 24, 32 }
};
static readonly byte[][] shifts1 =
{
new byte[]{ 0, 24, 16, 8 },
new byte[]{ 0, 32, 24, 16 },
new byte[]{ 0, 40, 32, 24 },
new byte[]{ 0, 48, 40, 24 },
new byte[]{ 0, 56, 40, 32 }
};
/**
* multiply two elements of GF(2^m)
* needed for MixColumn and InvMixColumn
*/
private byte Mul0x2(
int b)
{
if (b != 0)
{
return Alogtable[25 + (Logtable[b] & 0xff)];
}
else
{
return 0;
}
}
private byte Mul0x3(
int b)
{
if (b != 0)
{
return Alogtable[1 + (Logtable[b] & 0xff)];
}
else
{
return 0;
}
}
private byte Mul0x9(
int b)
{
if (b >= 0)
{
return Alogtable[199 + b];
}
else
{
return 0;
}
}
private byte Mul0xb(
int b)
{
if (b >= 0)
{
return Alogtable[104 + b];
}
else
{
return 0;
}
}
private byte Mul0xd(
int b)
{
if (b >= 0)
{
return Alogtable[238 + b];
}
else
{
return 0;
}
}
private byte Mul0xe(
int b)
{
if (b >= 0)
{
return Alogtable[223 + b];
}
else
{
return 0;
}
}
/**
* xor corresponding text input and round key input bytes
*/
private void KeyAddition(
long[] rk)
{
A0 ^= rk[0];
A1 ^= rk[1];
A2 ^= rk[2];
A3 ^= rk[3];
}
private long Shift(
long r,
int shift)
{
//return (((long)((ulong) r >> shift) | (r << (BC - shift)))) & BC_MASK;
ulong temp = (ulong) r >> shift;
// NB: This corrects for Mono Bug #79087 (fixed in 1.1.17)
if (shift > 31)
{
temp &= 0xFFFFFFFFUL;
}
return ((long) temp | (r << (BC - shift))) & BC_MASK;
}
/**
* Row 0 remains unchanged
* The other three rows are shifted a variable amount
*/
private void ShiftRow(
byte[] shiftsSC)
{
A1 = Shift(A1, shiftsSC[1]);
A2 = Shift(A2, shiftsSC[2]);
A3 = Shift(A3, shiftsSC[3]);
}
private long ApplyS(
long r,
byte[] box)
{
long res = 0;
for (int j = 0; j < BC; j += 8)
{
res |= (long)(box[(int)((r >> j) & 0xff)] & 0xff) << j;
}
return res;
}
/**
* Replace every byte of the input by the byte at that place
* in the nonlinear S-box
*/
private void Substitution(
byte[] box)
{
A0 = ApplyS(A0, box);
A1 = ApplyS(A1, box);
A2 = ApplyS(A2, box);
A3 = ApplyS(A3, box);
}
/**
* Mix the bytes of every column in a linear way
*/
private void MixColumn()
{
long r0, r1, r2, r3;
r0 = r1 = r2 = r3 = 0;
for (int j = 0; j < BC; j += 8)
{
int a0 = (int)((A0 >> j) & 0xff);
int a1 = (int)((A1 >> j) & 0xff);
int a2 = (int)((A2 >> j) & 0xff);
int a3 = (int)((A3 >> j) & 0xff);
r0 |= (long)((Mul0x2(a0) ^ Mul0x3(a1) ^ a2 ^ a3) & 0xff) << j;
r1 |= (long)((Mul0x2(a1) ^ Mul0x3(a2) ^ a3 ^ a0) & 0xff) << j;
r2 |= (long)((Mul0x2(a2) ^ Mul0x3(a3) ^ a0 ^ a1) & 0xff) << j;
r3 |= (long)((Mul0x2(a3) ^ Mul0x3(a0) ^ a1 ^ a2) & 0xff) << j;
}
A0 = r0;
A1 = r1;
A2 = r2;
A3 = r3;
}
/**
* Mix the bytes of every column in a linear way
* This is the opposite operation of Mixcolumn
*/
private void InvMixColumn()
{
long r0, r1, r2, r3;
r0 = r1 = r2 = r3 = 0;
for (int j = 0; j < BC; j += 8)
{
int a0 = (int)((A0 >> j) & 0xff);
int a1 = (int)((A1 >> j) & 0xff);
int a2 = (int)((A2 >> j) & 0xff);
int a3 = (int)((A3 >> j) & 0xff);
//
// pre-lookup the log table
//
a0 = (a0 != 0) ? (Logtable[a0 & 0xff] & 0xff) : -1;
a1 = (a1 != 0) ? (Logtable[a1 & 0xff] & 0xff) : -1;
a2 = (a2 != 0) ? (Logtable[a2 & 0xff] & 0xff) : -1;
a3 = (a3 != 0) ? (Logtable[a3 & 0xff] & 0xff) : -1;
r0 |= (long)((Mul0xe(a0) ^ Mul0xb(a1) ^ Mul0xd(a2) ^ Mul0x9(a3)) & 0xff) << j;
r1 |= (long)((Mul0xe(a1) ^ Mul0xb(a2) ^ Mul0xd(a3) ^ Mul0x9(a0)) & 0xff) << j;
r2 |= (long)((Mul0xe(a2) ^ Mul0xb(a3) ^ Mul0xd(a0) ^ Mul0x9(a1)) & 0xff) << j;
r3 |= (long)((Mul0xe(a3) ^ Mul0xb(a0) ^ Mul0xd(a1) ^ Mul0x9(a2)) & 0xff) << j;
}
A0 = r0;
A1 = r1;
A2 = r2;
A3 = r3;
}
/**
* Calculate the necessary round keys
* The number of calculations depends on keyBits and blockBits
*/
private long[][] GenerateWorkingKey(
byte[] key)
{
int KC;
int t, rconpointer = 0;
int keyBits = key.Length * 8;
byte[,] tk = new byte[4,MAXKC];
//long[,] W = new long[MAXROUNDS+1,4];
long[][] W = new long[MAXROUNDS+1][];
for (int i = 0; i < MAXROUNDS+1; i++) W[i] = new long[4];
switch (keyBits)
{
case 128:
KC = 4;
break;
case 160:
KC = 5;
break;
case 192:
KC = 6;
break;
case 224:
KC = 7;
break;
case 256:
KC = 8;
break;
default :
throw new ArgumentException("Key length not 128/160/192/224/256 bits.");
}
if (keyBits >= blockBits)
{
ROUNDS = KC + 6;
}
else
{
ROUNDS = (BC / 8) + 6;
}
//
// copy the key into the processing area
//
int index = 0;
for (int i = 0; i < key.Length; i++)
{
tk[i % 4,i / 4] = key[index++];
}
t = 0;
//
// copy values into round key array
//
for (int j = 0; (j < KC) && (t < (ROUNDS+1)*(BC / 8)); j++, t++)
{
for (int i = 0; i < 4; i++)
{
W[t / (BC / 8)][i] |= (long)(tk[i,j] & 0xff) << ((t * 8) % BC);
}
}
//
// while not enough round key material calculated
// calculate new values
//
while (t < (ROUNDS+1)*(BC/8))
{
for (int i = 0; i < 4; i++)
{
tk[i,0] ^= S[tk[(i+1)%4,KC-1] & 0xff];
}
tk[0,0] ^= (byte) rcon[rconpointer++];
if (KC <= 6)
{
for (int j = 1; j < KC; j++)
{
for (int i = 0; i < 4; i++)
{
tk[i,j] ^= tk[i,j-1];
}
}
}
else
{
for (int j = 1; j < 4; j++)
{
for (int i = 0; i < 4; i++)
{
tk[i,j] ^= tk[i,j-1];
}
}
for (int i = 0; i < 4; i++)
{
tk[i,4] ^= S[tk[i,3] & 0xff];
}
for (int j = 5; j < KC; j++)
{
for (int i = 0; i < 4; i++)
{
tk[i,j] ^= tk[i,j-1];
}
}
}
//
// copy values into round key array
//
for (int j = 0; (j < KC) && (t < (ROUNDS+1)*(BC/8)); j++, t++)
{
for (int i = 0; i < 4; i++)
{
W[t / (BC/8)][i] |= (long)(tk[i,j] & 0xff) << ((t * 8) % (BC));
}
}
}
return W;
}
private int BC;
private long BC_MASK;
private int ROUNDS;
private int blockBits;
private long[][] workingKey;
private long A0, A1, A2, A3;
private bool forEncryption;
private byte[] shifts0SC;
private byte[] shifts1SC;
/**
* default constructor - 128 bit block size.
*/
public RijndaelEngine() : this(128) {}
/**
* basic constructor - set the cipher up for a given blocksize
*
* @param blocksize the blocksize in bits, must be 128, 192, or 256.
*/
public RijndaelEngine(
int blockBits)
{
switch (blockBits)
{
case 128:
BC = 32;
BC_MASK = 0xffffffffL;
shifts0SC = shifts0[0];
shifts1SC = shifts1[0];
break;
case 160:
BC = 40;
BC_MASK = 0xffffffffffL;
shifts0SC = shifts0[1];
shifts1SC = shifts1[1];
break;
case 192:
BC = 48;
BC_MASK = 0xffffffffffffL;
shifts0SC = shifts0[2];
shifts1SC = shifts1[2];
break;
case 224:
BC = 56;
BC_MASK = 0xffffffffffffffL;
shifts0SC = shifts0[3];
shifts1SC = shifts1[3];
break;
case 256:
BC = 64;
BC_MASK = unchecked( (long)0xffffffffffffffffL);
shifts0SC = shifts0[4];
shifts1SC = shifts1[4];
break;
default:
throw new ArgumentException("unknown blocksize to Rijndael");
}
this.blockBits = blockBits;
}
/**
* initialise a Rijndael cipher.
*
* @param forEncryption whether or not we are for encryption.
* @param parameters the parameters required to set up the cipher.
* @exception ArgumentException if the parameters argument is
* inappropriate.
*/
public virtual void Init(
bool forEncryption,
ICipherParameters parameters)
{
if (typeof(KeyParameter).IsInstanceOfType(parameters))
{
workingKey = GenerateWorkingKey(((KeyParameter)parameters).GetKey());
this.forEncryption = forEncryption;
return;
}
throw new ArgumentException("invalid parameter passed to Rijndael init - " + BestHTTP.SecureProtocol.Org.BouncyCastle.Utilities.Platform.GetTypeName(parameters));
}
public virtual string AlgorithmName
{
get { return "Rijndael"; }
}
public virtual bool IsPartialBlockOkay
{
get { return false; }
}
public virtual int GetBlockSize()
{
return BC / 2;
}
public virtual int ProcessBlock(
byte[] input,
int inOff,
byte[] output,
int outOff)
{
if (workingKey == null)
throw new InvalidOperationException("Rijndael engine not initialised");
Check.DataLength(input, inOff, (BC / 2), "input buffer too short");
Check.OutputLength(output, outOff, (BC / 2), "output buffer too short");
UnPackBlock(input, inOff);
if (forEncryption)
{
EncryptBlock(workingKey);
}
else
{
DecryptBlock(workingKey);
}
PackBlock(output, outOff);
return BC / 2;
}
public virtual void Reset()
{
}
private void UnPackBlock(
byte[] bytes,
int off)
{
int index = off;
A0 = (long)(bytes[index++] & 0xff);
A1 = (long)(bytes[index++] & 0xff);
A2 = (long)(bytes[index++] & 0xff);
A3 = (long)(bytes[index++] & 0xff);
for (int j = 8; j != BC; j += 8)
{
A0 |= (long)(bytes[index++] & 0xff) << j;
A1 |= (long)(bytes[index++] & 0xff) << j;
A2 |= (long)(bytes[index++] & 0xff) << j;
A3 |= (long)(bytes[index++] & 0xff) << j;
}
}
private void PackBlock(
byte[] bytes,
int off)
{
int index = off;
for (int j = 0; j != BC; j += 8)
{
bytes[index++] = (byte)(A0 >> j);
bytes[index++] = (byte)(A1 >> j);
bytes[index++] = (byte)(A2 >> j);
bytes[index++] = (byte)(A3 >> j);
}
}
private void EncryptBlock(
long[][] rk)
{
int r;
//
// begin with a key addition
//
KeyAddition(rk[0]);
//
// ROUNDS-1 ordinary rounds
//
for (r = 1; r < ROUNDS; r++)
{
Substitution(S);
ShiftRow(shifts0SC);
MixColumn();
KeyAddition(rk[r]);
}
//
// Last round is special: there is no MixColumn
//
Substitution(S);
ShiftRow(shifts0SC);
KeyAddition(rk[ROUNDS]);
}
private void DecryptBlock(
long[][] rk)
{
int r;
// To decrypt: apply the inverse operations of the encrypt routine,
// in opposite order
//
// (KeyAddition is an involution: it 's equal to its inverse)
// (the inverse of Substitution with table S is Substitution with the inverse table of S)
// (the inverse of Shiftrow is Shiftrow over a suitable distance)
//
// First the special round:
// without InvMixColumn
// with extra KeyAddition
//
KeyAddition(rk[ROUNDS]);
Substitution(Si);
ShiftRow(shifts1SC);
//
// ROUNDS-1 ordinary rounds
//
for (r = ROUNDS-1; r > 0; r--)
{
KeyAddition(rk[r]);
InvMixColumn();
Substitution(Si);
ShiftRow(shifts1SC);
}
//
// End with the extra key addition
//
KeyAddition(rk[0]);
}
}
}
#pragma warning restore
#endif