internal override void ProcessBlock()
{
//
// expand 16 word block into 80 word block.
//
for (int i = 16; i < 80; i++)
{
uint t = X[i - 3] ^ X[i - 8] ^ X[i - 14] ^ X[i - 16];
X[i] = t << 1 | t >> 31;
}
//
// set up working variables.
//
uint A = H1;
uint B = H2;
uint C = H3;
uint D = H4;
uint E = H5;
//
// round 1
//
int idx = 0;
for (int j = 0; j < 4; j++)
{
// E = rotateLeft(A, 5) + F(B, C, D) + E + X[idx++] + Y1
// B = rotateLeft(B, 30)
E += (A << 5 | (A >> 27)) + F(B, C, D) + X[idx++] + Y1;
B = B << 30 | (B >> 2);
D += (E << 5 | (E >> 27)) + F(A, B, C) + X[idx++] + Y1;
A = A << 30 | (A >> 2);
C += (D << 5 | (D >> 27)) + F(E, A, B) + X[idx++] + Y1;
E = E << 30 | (E >> 2);
B += (C << 5 | (C >> 27)) + F(D, E, A) + X[idx++] + Y1;
D = D << 30 | (D >> 2);
A += (B << 5 | (B >> 27)) + F(C, D, E) + X[idx++] + Y1;
C = C << 30 | (C >> 2);
}
//
// round 2
//
for (int j = 0; j < 4; j++)
{
// E = rotateLeft(A, 5) + H(B, C, D) + E + X[idx++] + Y2
// B = rotateLeft(B, 30)
E += (A << 5 | (A >> 27)) + H(B, C, D) + X[idx++] + Y2;
B = B << 30 | (B >> 2);
D += (E << 5 | (E >> 27)) + H(A, B, C) + X[idx++] + Y2;
A = A << 30 | (A >> 2);
C += (D << 5 | (D >> 27)) + H(E, A, B) + X[idx++] + Y2;
E = E << 30 | (E >> 2);
B += (C << 5 | (C >> 27)) + H(D, E, A) + X[idx++] + Y2;
D = D << 30 | (D >> 2);
A += (B << 5 | (B >> 27)) + H(C, D, E) + X[idx++] + Y2;
C = C << 30 | (C >> 2);
}
//
// round 3
//
for (int j = 0; j < 4; j++)
{
// E = rotateLeft(A, 5) + G(B, C, D) + E + X[idx++] + Y3
// B = rotateLeft(B, 30)
E += (A << 5 | (A >> 27)) + G(B, C, D) + X[idx++] + Y3;
B = B << 30 | (B >> 2);
D += (E << 5 | (E >> 27)) + G(A, B, C) + X[idx++] + Y3;
A = A << 30 | (A >> 2);
C += (D << 5 | (D >> 27)) + G(E, A, B) + X[idx++] + Y3;
E = E << 30 | (E >> 2);
B += (C << 5 | (C >> 27)) + G(D, E, A) + X[idx++] + Y3;
D = D << 30 | (D >> 2);
A += (B << 5 | (B >> 27)) + G(C, D, E) + X[idx++] + Y3;
C = C << 30 | (C >> 2);
}
//
// round 4
//
for (int j = 0; j < 4; j++)
{
// E = rotateLeft(A, 5) + H(B, C, D) + E + X[idx++] + Y4
// B = rotateLeft(B, 30)
E += (A << 5 | (A >> 27)) + H(B, C, D) + X[idx++] + Y4;
B = B << 30 | (B >> 2);
D += (E << 5 | (E >> 27)) + H(A, B, C) + X[idx++] + Y4;
A = A << 30 | (A >> 2);
C += (D << 5 | (D >> 27)) + H(E, A, B) + X[idx++] + Y4;
E = E << 30 | (E >> 2);
B += (C << 5 | (C >> 27)) + H(D, E, A) + X[idx++] + Y4;
D = D << 30 | (D >> 2);
A += (B << 5 | (B >> 27)) + H(C, D, E) + X[idx++] + Y4;
C = C << 30 | (C >> 2);
}
H1 += A;
H2 += B;
H3 += C;
H4 += D;
H5 += E;
//
// reset start of the buffer.
//
xOff = 0;
Array.Clear(X, 0, 16);
}