// Token: 0x06000122 RID: 290 RVA: 0x0000936C File Offset: 0x0000756C private static uint Inv_Mcol(uint x) { uint num = x ^ AesEngine.Shift(x, 8); uint num2 = x ^ AesEngine.FFmulX(num); num ^= AesEngine.FFmulX2(num2); return(num2 ^ (num ^ AesEngine.Shift(num, 16))); }
private static uint Inv_Mcol(uint x) { uint num = AesEngine.FFmulX(x); uint num2 = AesEngine.FFmulX(num); uint num3 = AesEngine.FFmulX(num2); uint num4 = x ^ num3; return(num ^ num2 ^ num3 ^ AesEngine.Shift(num ^ num4, 8) ^ AesEngine.Shift(num2 ^ num4, 16) ^ AesEngine.Shift(num4, 24)); }
private uint[][] GenerateWorkingKey(byte[] key, bool forEncryption) { int num = key.Length / 4; if (num != 4 && num != 6 && num != 8) { throw new ArgumentException("Key length not 128/192/256 bits."); } this.ROUNDS = num + 6; uint[][] array = new uint[this.ROUNDS + 1][]; for (int i = 0; i <= this.ROUNDS; i++) { array[i] = new uint[4]; } int num2 = 0; int j = 0; while (j < key.Length) { array[num2 >> 2][num2 & 3] = Pack.LE_To_UInt32(key, j); j += 4; num2++; } int num3 = this.ROUNDS + 1 << 2; for (int k = num; k < num3; k++) { uint num4 = array[k - 1 >> 2][k - 1 & 3]; if (k % num == 0) { num4 = (AesEngine.SubWord(AesEngine.Shift(num4, 8)) ^ (uint)AesEngine.rcon[k / num - 1]); } else if (num > 6 && k % num == 4) { num4 = AesEngine.SubWord(num4); } array[k >> 2][k & 3] = (array[k - num >> 2][k - num & 3] ^ num4); } if (!forEncryption) { for (int l = 1; l < this.ROUNDS; l++) { uint[] array2 = array[l]; for (int m = 0; m < 4; m++) { array2[m] = AesEngine.Inv_Mcol(array2[m]); } } } return(array); }
// Token: 0x0600012F RID: 303 RVA: 0x0000A0A4 File Offset: 0x000082A4 private void DecryptBlock(uint[][] KW) { uint[] array = KW[this.ROUNDS]; uint num = this.C0 ^ array[0]; uint num2 = this.C1 ^ array[1]; uint num3 = this.C2 ^ array[2]; uint num4 = this.C3 ^ array[3]; int i = this.ROUNDS - 1; uint num5; uint num6; uint num7; while (i > 1) { array = KW[i--]; num5 = (AesEngine.Tinv0[(int)(num & 255U)] ^ AesEngine.Shift(AesEngine.Tinv0[(int)(num4 >> 8 & 255U)], 24) ^ AesEngine.Shift(AesEngine.Tinv0[(int)(num3 >> 16 & 255U)], 16) ^ AesEngine.Shift(AesEngine.Tinv0[(int)(num2 >> 24 & 255U)], 8) ^ array[0]); num6 = (AesEngine.Tinv0[(int)(num2 & 255U)] ^ AesEngine.Shift(AesEngine.Tinv0[(int)(num >> 8 & 255U)], 24) ^ AesEngine.Shift(AesEngine.Tinv0[(int)(num4 >> 16 & 255U)], 16) ^ AesEngine.Shift(AesEngine.Tinv0[(int)(num3 >> 24 & 255U)], 8) ^ array[1]); num7 = (AesEngine.Tinv0[(int)(num3 & 255U)] ^ AesEngine.Shift(AesEngine.Tinv0[(int)(num2 >> 8 & 255U)], 24) ^ AesEngine.Shift(AesEngine.Tinv0[(int)(num >> 16 & 255U)], 16) ^ AesEngine.Shift(AesEngine.Tinv0[(int)(num4 >> 24 & 255U)], 8) ^ array[2]); num4 = (AesEngine.Tinv0[(int)(num4 & 255U)] ^ AesEngine.Shift(AesEngine.Tinv0[(int)(num3 >> 8 & 255U)], 24) ^ AesEngine.Shift(AesEngine.Tinv0[(int)(num2 >> 16 & 255U)], 16) ^ AesEngine.Shift(AesEngine.Tinv0[(int)(num >> 24 & 255U)], 8) ^ array[3]); array = KW[i--]; num = (AesEngine.Tinv0[(int)(num5 & 255U)] ^ AesEngine.Shift(AesEngine.Tinv0[(int)(num4 >> 8 & 255U)], 24) ^ AesEngine.Shift(AesEngine.Tinv0[(int)(num7 >> 16 & 255U)], 16) ^ AesEngine.Shift(AesEngine.Tinv0[(int)(num6 >> 24 & 255U)], 8) ^ array[0]); num2 = (AesEngine.Tinv0[(int)(num6 & 255U)] ^ AesEngine.Shift(AesEngine.Tinv0[(int)(num5 >> 8 & 255U)], 24) ^ AesEngine.Shift(AesEngine.Tinv0[(int)(num4 >> 16 & 255U)], 16) ^ AesEngine.Shift(AesEngine.Tinv0[(int)(num7 >> 24 & 255U)], 8) ^ array[1]); num3 = (AesEngine.Tinv0[(int)(num7 & 255U)] ^ AesEngine.Shift(AesEngine.Tinv0[(int)(num6 >> 8 & 255U)], 24) ^ AesEngine.Shift(AesEngine.Tinv0[(int)(num5 >> 16 & 255U)], 16) ^ AesEngine.Shift(AesEngine.Tinv0[(int)(num4 >> 24 & 255U)], 8) ^ array[2]); num4 = (AesEngine.Tinv0[(int)(num4 & 255U)] ^ AesEngine.Shift(AesEngine.Tinv0[(int)(num7 >> 8 & 255U)], 24) ^ AesEngine.Shift(AesEngine.Tinv0[(int)(num6 >> 16 & 255U)], 16) ^ AesEngine.Shift(AesEngine.Tinv0[(int)(num5 >> 24 & 255U)], 8) ^ array[3]); } array = KW[1]; num5 = (AesEngine.Tinv0[(int)(num & 255U)] ^ AesEngine.Shift(AesEngine.Tinv0[(int)(num4 >> 8 & 255U)], 24) ^ AesEngine.Shift(AesEngine.Tinv0[(int)(num3 >> 16 & 255U)], 16) ^ AesEngine.Shift(AesEngine.Tinv0[(int)(num2 >> 24 & 255U)], 8) ^ array[0]); num6 = (AesEngine.Tinv0[(int)(num2 & 255U)] ^ AesEngine.Shift(AesEngine.Tinv0[(int)(num >> 8 & 255U)], 24) ^ AesEngine.Shift(AesEngine.Tinv0[(int)(num4 >> 16 & 255U)], 16) ^ AesEngine.Shift(AesEngine.Tinv0[(int)(num3 >> 24 & 255U)], 8) ^ array[1]); num7 = (AesEngine.Tinv0[(int)(num3 & 255U)] ^ AesEngine.Shift(AesEngine.Tinv0[(int)(num2 >> 8 & 255U)], 24) ^ AesEngine.Shift(AesEngine.Tinv0[(int)(num >> 16 & 255U)], 16) ^ AesEngine.Shift(AesEngine.Tinv0[(int)(num4 >> 24 & 255U)], 8) ^ array[2]); num4 = (AesEngine.Tinv0[(int)(num4 & 255U)] ^ AesEngine.Shift(AesEngine.Tinv0[(int)(num3 >> 8 & 255U)], 24) ^ AesEngine.Shift(AesEngine.Tinv0[(int)(num2 >> 16 & 255U)], 16) ^ AesEngine.Shift(AesEngine.Tinv0[(int)(num >> 24 & 255U)], 8) ^ array[3]); array = KW[0]; this.C0 = (uint)((int)AesEngine.Si[(int)(num5 & 255U)] ^ (int)this.s[(int)(num4 >> 8 & 255U)] << 8 ^ (int)this.s[(int)(num7 >> 16 & 255U)] << 16 ^ (int)AesEngine.Si[(int)(num6 >> 24 & 255U)] << 24 ^ (int)array[0]); this.C1 = (uint)((int)this.s[(int)(num6 & 255U)] ^ (int)this.s[(int)(num5 >> 8 & 255U)] << 8 ^ (int)AesEngine.Si[(int)(num4 >> 16 & 255U)] << 16 ^ (int)this.s[(int)(num7 >> 24 & 255U)] << 24 ^ (int)array[1]); this.C2 = (uint)((int)this.s[(int)(num7 & 255U)] ^ (int)AesEngine.Si[(int)(num6 >> 8 & 255U)] << 8 ^ (int)AesEngine.Si[(int)(num5 >> 16 & 255U)] << 16 ^ (int)this.s[(int)(num4 >> 24 & 255U)] << 24 ^ (int)array[2]); this.C3 = (uint)((int)AesEngine.Si[(int)(num4 & 255U)] ^ (int)this.s[(int)(num7 >> 8 & 255U)] << 8 ^ (int)this.s[(int)(num6 >> 16 & 255U)] << 16 ^ (int)this.s[(int)(num5 >> 24 & 255U)] << 24 ^ (int)array[3]); }
private void EncryptBlock(uint[][] KW) { uint[] array = KW[0]; uint num = this.C0 ^ array[0]; uint num2 = this.C1 ^ array[1]; uint num3 = this.C2 ^ array[2]; uint num4 = this.C3 ^ array[3]; int i = 1; uint num5; uint num6; uint num7; while (i < this.ROUNDS - 1) { array = KW[i++]; num5 = (AesEngine.T0[(int)((UIntPtr)(num & 255u))] ^ AesEngine.Shift(AesEngine.T0[(int)((UIntPtr)(num2 >> 8 & 255u))], 24) ^ AesEngine.Shift(AesEngine.T0[(int)((UIntPtr)(num3 >> 16 & 255u))], 16) ^ AesEngine.Shift(AesEngine.T0[(int)((UIntPtr)(num4 >> 24 & 255u))], 8) ^ array[0]); num6 = (AesEngine.T0[(int)((UIntPtr)(num2 & 255u))] ^ AesEngine.Shift(AesEngine.T0[(int)((UIntPtr)(num3 >> 8 & 255u))], 24) ^ AesEngine.Shift(AesEngine.T0[(int)((UIntPtr)(num4 >> 16 & 255u))], 16) ^ AesEngine.Shift(AesEngine.T0[(int)((UIntPtr)(num >> 24 & 255u))], 8) ^ array[1]); num7 = (AesEngine.T0[(int)((UIntPtr)(num3 & 255u))] ^ AesEngine.Shift(AesEngine.T0[(int)((UIntPtr)(num4 >> 8 & 255u))], 24) ^ AesEngine.Shift(AesEngine.T0[(int)((UIntPtr)(num >> 16 & 255u))], 16) ^ AesEngine.Shift(AesEngine.T0[(int)((UIntPtr)(num2 >> 24 & 255u))], 8) ^ array[2]); num4 = (AesEngine.T0[(int)((UIntPtr)(num4 & 255u))] ^ AesEngine.Shift(AesEngine.T0[(int)((UIntPtr)(num >> 8 & 255u))], 24) ^ AesEngine.Shift(AesEngine.T0[(int)((UIntPtr)(num2 >> 16 & 255u))], 16) ^ AesEngine.Shift(AesEngine.T0[(int)((UIntPtr)(num3 >> 24 & 255u))], 8) ^ array[3]); array = KW[i++]; num = (AesEngine.T0[(int)((UIntPtr)(num5 & 255u))] ^ AesEngine.Shift(AesEngine.T0[(int)((UIntPtr)(num6 >> 8 & 255u))], 24) ^ AesEngine.Shift(AesEngine.T0[(int)((UIntPtr)(num7 >> 16 & 255u))], 16) ^ AesEngine.Shift(AesEngine.T0[(int)((UIntPtr)(num4 >> 24 & 255u))], 8) ^ array[0]); num2 = (AesEngine.T0[(int)((UIntPtr)(num6 & 255u))] ^ AesEngine.Shift(AesEngine.T0[(int)((UIntPtr)(num7 >> 8 & 255u))], 24) ^ AesEngine.Shift(AesEngine.T0[(int)((UIntPtr)(num4 >> 16 & 255u))], 16) ^ AesEngine.Shift(AesEngine.T0[(int)((UIntPtr)(num5 >> 24 & 255u))], 8) ^ array[1]); num3 = (AesEngine.T0[(int)((UIntPtr)(num7 & 255u))] ^ AesEngine.Shift(AesEngine.T0[(int)((UIntPtr)(num4 >> 8 & 255u))], 24) ^ AesEngine.Shift(AesEngine.T0[(int)((UIntPtr)(num5 >> 16 & 255u))], 16) ^ AesEngine.Shift(AesEngine.T0[(int)((UIntPtr)(num6 >> 24 & 255u))], 8) ^ array[2]); num4 = (AesEngine.T0[(int)((UIntPtr)(num4 & 255u))] ^ AesEngine.Shift(AesEngine.T0[(int)((UIntPtr)(num5 >> 8 & 255u))], 24) ^ AesEngine.Shift(AesEngine.T0[(int)((UIntPtr)(num6 >> 16 & 255u))], 16) ^ AesEngine.Shift(AesEngine.T0[(int)((UIntPtr)(num7 >> 24 & 255u))], 8) ^ array[3]); } array = KW[i++]; num5 = (AesEngine.T0[(int)((UIntPtr)(num & 255u))] ^ AesEngine.Shift(AesEngine.T0[(int)((UIntPtr)(num2 >> 8 & 255u))], 24) ^ AesEngine.Shift(AesEngine.T0[(int)((UIntPtr)(num3 >> 16 & 255u))], 16) ^ AesEngine.Shift(AesEngine.T0[(int)((UIntPtr)(num4 >> 24 & 255u))], 8) ^ array[0]); num6 = (AesEngine.T0[(int)((UIntPtr)(num2 & 255u))] ^ AesEngine.Shift(AesEngine.T0[(int)((UIntPtr)(num3 >> 8 & 255u))], 24) ^ AesEngine.Shift(AesEngine.T0[(int)((UIntPtr)(num4 >> 16 & 255u))], 16) ^ AesEngine.Shift(AesEngine.T0[(int)((UIntPtr)(num >> 24 & 255u))], 8) ^ array[1]); num7 = (AesEngine.T0[(int)((UIntPtr)(num3 & 255u))] ^ AesEngine.Shift(AesEngine.T0[(int)((UIntPtr)(num4 >> 8 & 255u))], 24) ^ AesEngine.Shift(AesEngine.T0[(int)((UIntPtr)(num >> 16 & 255u))], 16) ^ AesEngine.Shift(AesEngine.T0[(int)((UIntPtr)(num2 >> 24 & 255u))], 8) ^ array[2]); num4 = (AesEngine.T0[(int)((UIntPtr)(num4 & 255u))] ^ AesEngine.Shift(AesEngine.T0[(int)((UIntPtr)(num >> 8 & 255u))], 24) ^ AesEngine.Shift(AesEngine.T0[(int)((UIntPtr)(num2 >> 16 & 255u))], 16) ^ AesEngine.Shift(AesEngine.T0[(int)((UIntPtr)(num3 >> 24 & 255u))], 8) ^ array[3]); array = KW[i]; this.C0 = (uint)((int)AesEngine.S[(int)((UIntPtr)(num5 & 255u))] ^ (int)AesEngine.S[(int)((UIntPtr)(num6 >> 8 & 255u))] << 8 ^ (int)AesEngine.S[(int)((UIntPtr)(num7 >> 16 & 255u))] << 16 ^ (int)AesEngine.S[(int)((UIntPtr)(num4 >> 24 & 255u))] << 24 ^ (int)array[0]); this.C1 = (uint)((int)AesEngine.S[(int)((UIntPtr)(num6 & 255u))] ^ (int)AesEngine.S[(int)((UIntPtr)(num7 >> 8 & 255u))] << 8 ^ (int)AesEngine.S[(int)((UIntPtr)(num4 >> 16 & 255u))] << 16 ^ (int)AesEngine.S[(int)((UIntPtr)(num5 >> 24 & 255u))] << 24 ^ (int)array[1]); this.C2 = (uint)((int)AesEngine.S[(int)((UIntPtr)(num7 & 255u))] ^ (int)AesEngine.S[(int)((UIntPtr)(num4 >> 8 & 255u))] << 8 ^ (int)AesEngine.S[(int)((UIntPtr)(num5 >> 16 & 255u))] << 16 ^ (int)AesEngine.S[(int)((UIntPtr)(num6 >> 24 & 255u))] << 24 ^ (int)array[2]); this.C3 = (uint)((int)AesEngine.S[(int)((UIntPtr)(num4 & 255u))] ^ (int)AesEngine.S[(int)((UIntPtr)(num5 >> 8 & 255u))] << 8 ^ (int)AesEngine.S[(int)((UIntPtr)(num6 >> 16 & 255u))] << 16 ^ (int)AesEngine.S[(int)((UIntPtr)(num7 >> 24 & 255u))] << 24 ^ (int)array[3]); }
// Token: 0x06000124 RID: 292 RVA: 0x000093FC File Offset: 0x000075FC private uint[][] GenerateWorkingKey(byte[] key, bool forEncryption) { int num = key.Length; if (num < 16 || num > 32 || (num & 7) != 0) { throw new ArgumentException("Key length not 128/192/256 bits."); } int num2 = num >> 2; this.ROUNDS = num2 + 6; uint[][] array = new uint[this.ROUNDS + 1][]; for (int i = 0; i <= this.ROUNDS; i++) { array[i] = new uint[4]; } switch (num2) { case 4: { uint num3 = Pack.LE_To_UInt32(key, 0); array[0][0] = num3; uint num4 = Pack.LE_To_UInt32(key, 4); array[0][1] = num4; uint num5 = Pack.LE_To_UInt32(key, 8); array[0][2] = num5; uint num6 = Pack.LE_To_UInt32(key, 12); array[0][3] = num6; for (int j = 1; j <= 10; j++) { uint num7 = AesEngine.SubWord(AesEngine.Shift(num6, 8)) ^ (uint)AesEngine.rcon[j - 1]; num3 ^= num7; array[j][0] = num3; num4 ^= num3; array[j][1] = num4; num5 ^= num4; array[j][2] = num5; num6 ^= num5; array[j][3] = num6; } goto IL_4EC; } case 6: { uint num8 = Pack.LE_To_UInt32(key, 0); array[0][0] = num8; uint num9 = Pack.LE_To_UInt32(key, 4); array[0][1] = num9; uint num10 = Pack.LE_To_UInt32(key, 8); array[0][2] = num10; uint num11 = Pack.LE_To_UInt32(key, 12); array[0][3] = num11; uint num12 = Pack.LE_To_UInt32(key, 16); array[1][0] = num12; uint num13 = Pack.LE_To_UInt32(key, 20); array[1][1] = num13; uint num14 = 1U; uint num15 = AesEngine.SubWord(AesEngine.Shift(num13, 8)) ^ num14; num14 <<= 1; num8 ^= num15; array[1][2] = num8; num9 ^= num8; array[1][3] = num9; num10 ^= num9; array[2][0] = num10; num11 ^= num10; array[2][1] = num11; num12 ^= num11; array[2][2] = num12; num13 ^= num12; array[2][3] = num13; for (int k = 3; k < 12; k += 3) { num15 = (AesEngine.SubWord(AesEngine.Shift(num13, 8)) ^ num14); num14 <<= 1; num8 ^= num15; array[k][0] = num8; num9 ^= num8; array[k][1] = num9; num10 ^= num9; array[k][2] = num10; num11 ^= num10; array[k][3] = num11; num12 ^= num11; array[k + 1][0] = num12; num13 ^= num12; array[k + 1][1] = num13; num15 = (AesEngine.SubWord(AesEngine.Shift(num13, 8)) ^ num14); num14 <<= 1; num8 ^= num15; array[k + 1][2] = num8; num9 ^= num8; array[k + 1][3] = num9; num10 ^= num9; array[k + 2][0] = num10; num11 ^= num10; array[k + 2][1] = num11; num12 ^= num11; array[k + 2][2] = num12; num13 ^= num12; array[k + 2][3] = num13; } num15 = (AesEngine.SubWord(AesEngine.Shift(num13, 8)) ^ num14); num8 ^= num15; array[12][0] = num8; num9 ^= num8; array[12][1] = num9; num10 ^= num9; array[12][2] = num10; num11 ^= num10; array[12][3] = num11; goto IL_4EC; } case 8: { uint num16 = Pack.LE_To_UInt32(key, 0); array[0][0] = num16; uint num17 = Pack.LE_To_UInt32(key, 4); array[0][1] = num17; uint num18 = Pack.LE_To_UInt32(key, 8); array[0][2] = num18; uint num19 = Pack.LE_To_UInt32(key, 12); array[0][3] = num19; uint num20 = Pack.LE_To_UInt32(key, 16); array[1][0] = num20; uint num21 = Pack.LE_To_UInt32(key, 20); array[1][1] = num21; uint num22 = Pack.LE_To_UInt32(key, 24); array[1][2] = num22; uint num23 = Pack.LE_To_UInt32(key, 28); array[1][3] = num23; uint num24 = 1U; uint num25; for (int l = 2; l < 14; l += 2) { num25 = (AesEngine.SubWord(AesEngine.Shift(num23, 8)) ^ num24); num24 <<= 1; num16 ^= num25; array[l][0] = num16; num17 ^= num16; array[l][1] = num17; num18 ^= num17; array[l][2] = num18; num19 ^= num18; array[l][3] = num19; num25 = AesEngine.SubWord(num19); num20 ^= num25; array[l + 1][0] = num20; num21 ^= num20; array[l + 1][1] = num21; num22 ^= num21; array[l + 1][2] = num22; num23 ^= num22; array[l + 1][3] = num23; } num25 = (AesEngine.SubWord(AesEngine.Shift(num23, 8)) ^ num24); num16 ^= num25; array[14][0] = num16; num17 ^= num16; array[14][1] = num17; num18 ^= num17; array[14][2] = num18; num19 ^= num18; array[14][3] = num19; goto IL_4EC; } } throw new InvalidOperationException("Should never get here"); IL_4EC: if (!forEncryption) { for (int m = 1; m < this.ROUNDS; m++) { uint[] array2 = array[m]; for (int n = 0; n < 4; n++) { array2[n] = AesEngine.Inv_Mcol(array2[n]); } } } return(array); }