| private static Shift ( uint r, int shift ) : uint | ||
| r | uint | |
| shift | int | |
| Résultat | uint | |
// 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);
}
