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; }