| static private F2 ( uint D, uint Kmi, int Kri ) : uint | ||
| D | uint | |
| Kmi | uint | |
| Kri | int | |
| Результат | uint | |
internal override void SetKey(byte[] key)
{
uint num = 1518500249u;
uint num2 = 1859775393u;
int num3 = 19;
int num4 = 17;
for (int i = 0; i < 24; i++)
{
for (int j = 0; j < 8; j++)
{
_Tm[i * 8 + j] = num;
num += num2;
_Tr[i * 8 + j] = num3;
num3 = (num3 + num4) & 0x1F;
}
}
byte[] array = new byte[64];
((global::System.Array)key).CopyTo((global::System.Array)array, 0);
for (int k = 0; k < 8; k++)
{
_workingKey[k] = Pack.BE_To_UInt32(array, k * 4);
}
for (int l = 0; l < 12; l++)
{
int num5 = l * 2 * 8;
uint[] workingKey;
(workingKey = _workingKey)[6] = workingKey[6] ^ Cast5Engine.F1(_workingKey[7], _Tm[num5], _Tr[num5]);
(workingKey = _workingKey)[5] = workingKey[5] ^ Cast5Engine.F2(_workingKey[6], _Tm[num5 + 1], _Tr[num5 + 1]);
(workingKey = _workingKey)[4] = workingKey[4] ^ Cast5Engine.F3(_workingKey[5], _Tm[num5 + 2], _Tr[num5 + 2]);
(workingKey = _workingKey)[3] = workingKey[3] ^ Cast5Engine.F1(_workingKey[4], _Tm[num5 + 3], _Tr[num5 + 3]);
(workingKey = _workingKey)[2] = workingKey[2] ^ Cast5Engine.F2(_workingKey[3], _Tm[num5 + 4], _Tr[num5 + 4]);
(workingKey = _workingKey)[1] = workingKey[1] ^ Cast5Engine.F3(_workingKey[2], _Tm[num5 + 5], _Tr[num5 + 5]);
(workingKey = _workingKey)[0] = workingKey[0] ^ Cast5Engine.F1(_workingKey[1], _Tm[num5 + 6], _Tr[num5 + 6]);
(workingKey = _workingKey)[7] = workingKey[7] ^ Cast5Engine.F2(_workingKey[0], _Tm[num5 + 7], _Tr[num5 + 7]);
num5 = (l * 2 + 1) * 8;
(workingKey = _workingKey)[6] = workingKey[6] ^ Cast5Engine.F1(_workingKey[7], _Tm[num5], _Tr[num5]);
(workingKey = _workingKey)[5] = workingKey[5] ^ Cast5Engine.F2(_workingKey[6], _Tm[num5 + 1], _Tr[num5 + 1]);
(workingKey = _workingKey)[4] = workingKey[4] ^ Cast5Engine.F3(_workingKey[5], _Tm[num5 + 2], _Tr[num5 + 2]);
(workingKey = _workingKey)[3] = workingKey[3] ^ Cast5Engine.F1(_workingKey[4], _Tm[num5 + 3], _Tr[num5 + 3]);
(workingKey = _workingKey)[2] = workingKey[2] ^ Cast5Engine.F2(_workingKey[3], _Tm[num5 + 4], _Tr[num5 + 4]);
(workingKey = _workingKey)[1] = workingKey[1] ^ Cast5Engine.F3(_workingKey[2], _Tm[num5 + 5], _Tr[num5 + 5]);
(workingKey = _workingKey)[0] = workingKey[0] ^ Cast5Engine.F1(_workingKey[1], _Tm[num5 + 6], _Tr[num5 + 6]);
(workingKey = _workingKey)[7] = workingKey[7] ^ Cast5Engine.F2(_workingKey[0], _Tm[num5 + 7], _Tr[num5 + 7]);
_Kr[l * 4] = (int)(_workingKey[0] & 0x1F);
_Kr[l * 4 + 1] = (int)(_workingKey[2] & 0x1F);
_Kr[l * 4 + 2] = (int)(_workingKey[4] & 0x1F);
_Kr[l * 4 + 3] = (int)(_workingKey[6] & 0x1F);
_Km[l * 4] = _workingKey[7];
_Km[l * 4 + 1] = _workingKey[5];
_Km[l * 4 + 2] = _workingKey[3];
_Km[l * 4 + 3] = _workingKey[1];
}
}
internal override void SetKey(byte[] key)
{
uint num = 1518500249u;
uint num2 = 1859775393u;
int num3 = 19;
int num4 = 17;
for (int i = 0; i < 24; i++)
{
for (int j = 0; j < 8; j++)
{
this._Tm[i * 8 + j] = num;
num += num2;
this._Tr[i * 8 + j] = num3;
num3 = (num3 + num4 & 31);
}
}
byte[] array = new byte[64];
key.CopyTo(array, 0);
for (int k = 0; k < 8; k++)
{
this._workingKey[k] = Pack.BE_To_UInt32(array, k * 4);
}
for (int l = 0; l < 12; l++)
{
int num5 = l * 2 * 8;
this._workingKey[6] ^= Cast5Engine.F1(this._workingKey[7], this._Tm[num5], this._Tr[num5]);
this._workingKey[5] ^= Cast5Engine.F2(this._workingKey[6], this._Tm[num5 + 1], this._Tr[num5 + 1]);
this._workingKey[4] ^= Cast5Engine.F3(this._workingKey[5], this._Tm[num5 + 2], this._Tr[num5 + 2]);
this._workingKey[3] ^= Cast5Engine.F1(this._workingKey[4], this._Tm[num5 + 3], this._Tr[num5 + 3]);
this._workingKey[2] ^= Cast5Engine.F2(this._workingKey[3], this._Tm[num5 + 4], this._Tr[num5 + 4]);
this._workingKey[1] ^= Cast5Engine.F3(this._workingKey[2], this._Tm[num5 + 5], this._Tr[num5 + 5]);
this._workingKey[0] ^= Cast5Engine.F1(this._workingKey[1], this._Tm[num5 + 6], this._Tr[num5 + 6]);
this._workingKey[7] ^= Cast5Engine.F2(this._workingKey[0], this._Tm[num5 + 7], this._Tr[num5 + 7]);
num5 = (l * 2 + 1) * 8;
this._workingKey[6] ^= Cast5Engine.F1(this._workingKey[7], this._Tm[num5], this._Tr[num5]);
this._workingKey[5] ^= Cast5Engine.F2(this._workingKey[6], this._Tm[num5 + 1], this._Tr[num5 + 1]);
this._workingKey[4] ^= Cast5Engine.F3(this._workingKey[5], this._Tm[num5 + 2], this._Tr[num5 + 2]);
this._workingKey[3] ^= Cast5Engine.F1(this._workingKey[4], this._Tm[num5 + 3], this._Tr[num5 + 3]);
this._workingKey[2] ^= Cast5Engine.F2(this._workingKey[3], this._Tm[num5 + 4], this._Tr[num5 + 4]);
this._workingKey[1] ^= Cast5Engine.F3(this._workingKey[2], this._Tm[num5 + 5], this._Tr[num5 + 5]);
this._workingKey[0] ^= Cast5Engine.F1(this._workingKey[1], this._Tm[num5 + 6], this._Tr[num5 + 6]);
this._workingKey[7] ^= Cast5Engine.F2(this._workingKey[0], this._Tm[num5 + 7], this._Tr[num5 + 7]);
this._Kr[l * 4] = (int)(this._workingKey[0] & 31u);
this._Kr[l * 4 + 1] = (int)(this._workingKey[2] & 31u);
this._Kr[l * 4 + 2] = (int)(this._workingKey[4] & 31u);
this._Kr[l * 4 + 3] = (int)(this._workingKey[6] & 31u);
this._Km[l * 4] = this._workingKey[7];
this._Km[l * 4 + 1] = this._workingKey[5];
this._Km[l * 4 + 2] = this._workingKey[3];
this._Km[l * 4 + 3] = this._workingKey[1];
}
}
internal override void SetKey(byte[] key)
{
uint num = 0x5a827999;
uint num2 = 0x6ed9eba1;
int num3 = 0x13;
int num4 = 0x11;
for (int i = 0; i < 0x18; i++)
{
for (int m = 0; m < 8; m++)
{
this._Tm[(i * 8) + m] = num;
num += num2;
this._Tr[(i * 8) + m] = num3;
num3 = (num3 + num4) & 0x1f;
}
}
byte[] array = new byte[0x40];
key.CopyTo(array, 0);
for (int j = 0; j < 8; j++)
{
this._workingKey[j] = Pack.BE_To_UInt32(array, j * 4);
}
for (int k = 0; k < 12; k++)
{
int index = (k * 2) * 8;
this._workingKey[6] ^= Cast5Engine.F1(this._workingKey[7], this._Tm[index], this._Tr[index]);
this._workingKey[5] ^= Cast5Engine.F2(this._workingKey[6], this._Tm[index + 1], this._Tr[index + 1]);
this._workingKey[4] ^= Cast5Engine.F3(this._workingKey[5], this._Tm[index + 2], this._Tr[index + 2]);
this._workingKey[3] ^= Cast5Engine.F1(this._workingKey[4], this._Tm[index + 3], this._Tr[index + 3]);
this._workingKey[2] ^= Cast5Engine.F2(this._workingKey[3], this._Tm[index + 4], this._Tr[index + 4]);
this._workingKey[1] ^= Cast5Engine.F3(this._workingKey[2], this._Tm[index + 5], this._Tr[index + 5]);
this._workingKey[0] ^= Cast5Engine.F1(this._workingKey[1], this._Tm[index + 6], this._Tr[index + 6]);
this._workingKey[7] ^= Cast5Engine.F2(this._workingKey[0], this._Tm[index + 7], this._Tr[index + 7]);
index = ((k * 2) + 1) * 8;
this._workingKey[6] ^= Cast5Engine.F1(this._workingKey[7], this._Tm[index], this._Tr[index]);
this._workingKey[5] ^= Cast5Engine.F2(this._workingKey[6], this._Tm[index + 1], this._Tr[index + 1]);
this._workingKey[4] ^= Cast5Engine.F3(this._workingKey[5], this._Tm[index + 2], this._Tr[index + 2]);
this._workingKey[3] ^= Cast5Engine.F1(this._workingKey[4], this._Tm[index + 3], this._Tr[index + 3]);
this._workingKey[2] ^= Cast5Engine.F2(this._workingKey[3], this._Tm[index + 4], this._Tr[index + 4]);
this._workingKey[1] ^= Cast5Engine.F3(this._workingKey[2], this._Tm[index + 5], this._Tr[index + 5]);
this._workingKey[0] ^= Cast5Engine.F1(this._workingKey[1], this._Tm[index + 6], this._Tr[index + 6]);
this._workingKey[7] ^= Cast5Engine.F2(this._workingKey[0], this._Tm[index + 7], this._Tr[index + 7]);
this._Kr[k * 4] = ((int)this._workingKey[0]) & 0x1f;
this._Kr[(k * 4) + 1] = ((int)this._workingKey[2]) & 0x1f;
this._Kr[(k * 4) + 2] = ((int)this._workingKey[4]) & 0x1f;
this._Kr[(k * 4) + 3] = ((int)this._workingKey[6]) & 0x1f;
this._Km[k * 4] = this._workingKey[7];
this._Km[(k * 4) + 1] = this._workingKey[5];
this._Km[(k * 4) + 2] = this._workingKey[3];
this._Km[(k * 4) + 3] = this._workingKey[1];
}
}
private void CAST_Decipher(uint A, uint B, uint C, uint D, uint[] result)
{
for (int i = 0; i < 6; i++)
{
int num = (11 - i) * 4;
C ^= Cast5Engine.F1(D, this._Km[num], this._Kr[num]);
B ^= Cast5Engine.F2(C, this._Km[num + 1], this._Kr[num + 1]);
A ^= Cast5Engine.F3(B, this._Km[num + 2], this._Kr[num + 2]);
D ^= Cast5Engine.F1(A, this._Km[num + 3], this._Kr[num + 3]);
}
for (int j = 6; j < 12; j++)
{
int num2 = (11 - j) * 4;
D ^= Cast5Engine.F1(A, this._Km[num2 + 3], this._Kr[num2 + 3]);
A ^= Cast5Engine.F3(B, this._Km[num2 + 2], this._Kr[num2 + 2]);
B ^= Cast5Engine.F2(C, this._Km[num2 + 1], this._Kr[num2 + 1]);
C ^= Cast5Engine.F1(D, this._Km[num2], this._Kr[num2]);
}
result[0] = A;
result[1] = B;
result[2] = C;
result[3] = D;
}
private void CAST_Encipher(uint A, uint B, uint C, uint D, uint[] result)
{
for (int i = 0; i < 6; i++)
{
int index = i * 4;
C ^= Cast5Engine.F1(D, this._Km[index], this._Kr[index]);
B ^= Cast5Engine.F2(C, this._Km[index + 1], this._Kr[index + 1]);
A ^= Cast5Engine.F3(B, this._Km[index + 2], this._Kr[index + 2]);
D ^= Cast5Engine.F1(A, this._Km[index + 3], this._Kr[index + 3]);
}
for (int j = 6; j < 12; j++)
{
int index = j * 4;
D ^= Cast5Engine.F1(A, this._Km[index + 3], this._Kr[index + 3]);
A ^= Cast5Engine.F3(B, this._Km[index + 2], this._Kr[index + 2]);
B ^= Cast5Engine.F2(C, this._Km[index + 1], this._Kr[index + 1]);
C ^= Cast5Engine.F1(D, this._Km[index], this._Kr[index]);
}
result[0] = A;
result[1] = B;
result[2] = C;
result[3] = D;
}
