def _transform(self, W):

        for t in range(16, 80):
            W.append(_rotateLeft(
                W[t-3] ^ W[t-8] ^ W[t-14] ^ W[t-16], 1) & 0xffffffff)

        A = self.H0
        B = self.H1
        C = self.H2
        D = self.H3
        E = self.H4

        """
        This loop was unrolled to gain about 10% in speed
        for t in range(0, 80):
            TEMP = _rotateLeft(A, 5) + f[t/20] + E + W[t] + K[t/20]
            E = D
            D = C
            C = _rotateLeft(B, 30) & 0xffffffff
            B = A
            A = TEMP & 0xffffffff
        """

        for t in range(0, 20):
            TEMP = _rotateLeft(A, 5) + ((B & C) | ((~ B) & D)) + E + W[t] + K[0]
            E = D
            D = C
            C = _rotateLeft(B, 30) & 0xffffffff
            B = A
            A = TEMP & 0xffffffff

        for t in range(20, 40):
            TEMP = _rotateLeft(A, 5) + (B ^ C ^ D) + E + W[t] + K[1]
            E = D
            D = C
            C = _rotateLeft(B, 30) & 0xffffffff
            B = A
            A = TEMP & 0xffffffff

        for t in range(40, 60):
            TEMP = _rotateLeft(A, 5) + ((B & C) | (B & D) | (C & D)) + E + W[t] + K[2]
            E = D
            D = C
            C = _rotateLeft(B, 30) & 0xffffffff
            B = A
            A = TEMP & 0xffffffff

        for t in range(60, 80):
            TEMP = _rotateLeft(A, 5) + (B ^ C ^ D)  + E + W[t] + K[3]
            E = D
            D = C
            C = _rotateLeft(B, 30) & 0xffffffff
            B = A
            A = TEMP & 0xffffffff


        self.H0 = (self.H0 + A) & 0xffffffff
        self.H1 = (self.H1 + B) & 0xffffffff
        self.H2 = (self.H2 + C) & 0xffffffff
        self.H3 = (self.H3 + D) & 0xffffffff
        self.H4 = (self.H4 + E) & 0xffffffff
def _transform(self, W):

        for t in range(16, 80):
            W.append(_rotateLeft(
                W[t-3] ^ W[t-8] ^ W[t-14] ^ W[t-16], 1) & 0xffffffff)

        A = self.H0
        B = self.H1
        C = self.H2
        D = self.H3
        E = self.H4

        """
        This loop was unrolled to gain about 10% in speed
        for t in range(0, 80):
            TEMP = _rotateLeft(A, 5) + f[t/20] + E + W[t] + K[t/20]
            E = D
            D = C
            C = _rotateLeft(B, 30) & 0xffffffff
            B = A
            A = TEMP & 0xffffffff
        """

        for t in range(0, 20):
            TEMP = _rotateLeft(A, 5) + ((B & C) | ((~ B) & D)) + E + W[t] + K[0]
            E = D
            D = C
            C = _rotateLeft(B, 30) & 0xffffffff
            B = A
            A = TEMP & 0xffffffff

        for t in range(20, 40):
            TEMP = _rotateLeft(A, 5) + (B ^ C ^ D) + E + W[t] + K[1]
            E = D
            D = C
            C = _rotateLeft(B, 30) & 0xffffffff
            B = A
            A = TEMP & 0xffffffff

        for t in range(40, 60):
            TEMP = _rotateLeft(A, 5) + ((B & C) | (B & D) | (C & D)) + E + W[t] + K[2]
            E = D
            D = C
            C = _rotateLeft(B, 30) & 0xffffffff
            B = A
            A = TEMP & 0xffffffff

        for t in range(60, 80):
            TEMP = _rotateLeft(A, 5) + (B ^ C ^ D)  + E + W[t] + K[3]
            E = D
            D = C
            C = _rotateLeft(B, 30) & 0xffffffff
            B = A
            A = TEMP & 0xffffffff


        self.H0 = (self.H0 + A) & 0xffffffff
        self.H1 = (self.H1 + B) & 0xffffffff
        self.H2 = (self.H2 + C) & 0xffffffff
        self.H3 = (self.H3 + D) & 0xffffffff
        self.H4 = (self.H4 + E) & 0xffffffff
def _transform ( self , W ) : for t in range ( 16 , 80 ) : W . append ( _rotateLeft ( W [ t - 3 ] ^ W [ t - 8 ] ^ W [ t - 14 ] ^ W [ t - 16 ] , 1 ) & 0xffffffff ) A = self . H0 B = self . H1 C = self . H2 D = self . H3 E = self . H4 for t in range ( 0 , 20 ) : TEMP = _rotateLeft ( A , 5 ) + ( ( B & C ) | ( ( ~ B ) & D ) ) + E + W [ t ] + K [ 0 ] E = D D = C C = _rotateLeft ( B , 30 ) & 0xffffffff B = A A = TEMP & 0xffffffff for t in range ( 20 , 40 ) : TEMP = _rotateLeft ( A , 5 ) + ( B ^ C ^ D ) + E + W [ t ] + K [ 1 ] E = D D = C C = _rotateLeft ( B , 30 ) & 0xffffffff B = A A = TEMP & 0xffffffff for t in range ( 40 , 60 ) : TEMP = _rotateLeft ( A , 5 ) + ( ( B & C ) | ( B & D ) | ( C & D ) ) + E + W [ t ] + K [ 2 ] E = D D = C C = _rotateLeft ( B , 30 ) & 0xffffffff B = A A = TEMP & 0xffffffff for t in range ( 60 , 80 ) : TEMP = _rotateLeft ( A , 5 ) + ( B ^ C ^ D ) + E + W [ t ] + K [ 3 ] E = D D = C C = _rotateLeft ( B , 30 ) & 0xffffffff B = A A = TEMP & 0xffffffff self . H0 = ( self . H0 + A ) & 0xffffffff self . H1 = ( self . H1 + B ) & 0xffffffff self . H2 = ( self . H2 + C ) & 0xffffffff self . H3 = ( self . H3 + D ) & 0xffffffff self . H4 = ( self . H4 + E ) & 0xffffffff
This loop was unrolled to gain about 10% in speed
        for t in range(0, 80):
            TEMP = _rotateLeft(A, 5) + f[t/20] + E + W[t] + K[t/20]
            E = D
            D = C
            C = _rotateLeft(B, 30) & 0xffffffff
            B = A
            A = TEMP & 0xffffffff
This loop was unrolled to gain about 10% in speed for t in range ( 0 80 ) : TEMP = _rotateLeft ( A 5 ) + f [ t / 20 ] + E + W [ t ] + K [ t / 20 ] E = D D = C C = _rotateLeft ( B 30 ) & 0xffffffff B = A A = TEMP & 0xffffffff