def CF()

in encode/python2/alibabacloud_darabonba_encode_util/sm3.py [0:0]

• 51 lines of code
• 6 McCabe index (conditional complexity)

def CF(V_i, B_i):
    W = []
    for i in range(16):
        weight = 0x1000000
        data = 0
        for k in range(i * 4, (i + 1) * 4):
            data = data + B_i[k] * weight
            weight = int(weight / 0x100)
        W.append(data)

    for j in range(16, 68):
        W.append(0)
        W[j] = P_1(W[j - 16] ^ W[j - 9] ^ (rotate_left(W[j - 3], 15))) ^ (rotate_left(W[j - 13], 7)) ^ W[j - 6]
        str1 = "%08x" % W[j]
    W_1 = []
    for j in range(0, 64):
        W_1.append(0)
        W_1[j] = W[j] ^ W[j + 4]
        str1 = "%08x" % W_1[j]

    A, B, C, D, E, F, G, H = V_i
    """
    print "00",
    out_hex([A, B, C, D, E, F, G, H])
    """
    for j in range(0, 64):
        SS1 = rotate_left(((rotate_left(A, 12)) + E + (rotate_left(T_j[j], j))) & 0xFFFFFFFF, 7)
        SS2 = SS1 ^ (rotate_left(A, 12))
        TT1 = (FF_j(A, B, C, j) + D + SS2 + W_1[j]) & 0xFFFFFFFF
        TT2 = (GG_j(E, F, G, j) + H + SS1 + W[j]) & 0xFFFFFFFF
        D = C
        C = rotate_left(B, 9)
        B = A
        A = TT1
        H = G
        G = rotate_left(F, 19)
        F = E
        E = P_0(TT2)

        A = A & 0xFFFFFFFF
        B = B & 0xFFFFFFFF
        C = C & 0xFFFFFFFF
        D = D & 0xFFFFFFFF
        E = E & 0xFFFFFFFF
        F = F & 0xFFFFFFFF
        G = G & 0xFFFFFFFF
        H = H & 0xFFFFFFFF
        """
        str1 = "%02d" % j
        if str1[0] == "0":
            str1 = ' ' + str1[1:]
        out_hex([A, B, C, D, E, F, G, H])
        """

    V_i_1 = [
        A ^ V_i[0],
        B ^ V_i[1],
        C ^ V_i[2],
        D ^ V_i[3],
        E ^ V_i[4],
        F ^ V_i[5],
        G ^ V_i[6],
        H ^ V_i[7]
    ]
    return V_i_1