# -*- encoding: utf-8 -*-
"""
@File    : SM3Util.py
@Time    : 2022/6/28 8:34
@Author  : stephen
@Email   : zhangdongming@asj6.wecom.work
@Software: PyCharm
"""
IV = [1937774191, 1226093241, 388252375, 3666478592, 2842636476, 372324522, 3817729613, 2969243214, ]
Tj = [
    2043430169, 2043430169, 2043430169, 2043430169, 2043430169, 2043430169,
    2043430169, 2043430169, 2043430169, 2043430169, 2043430169, 2043430169,
    2043430169, 2043430169, 2043430169, 2043430169, 2055708042, 2055708042,
    2055708042, 2055708042, 2055708042, 2055708042, 2055708042, 2055708042,
    2055708042, 2055708042, 2055708042, 2055708042, 2055708042, 2055708042,
    2055708042, 2055708042, 2055708042, 2055708042, 2055708042, 2055708042,
    2055708042, 2055708042, 2055708042, 2055708042, 2055708042, 2055708042,
    2055708042, 2055708042, 2055708042, 2055708042, 2055708042, 2055708042,
    2055708042, 2055708042, 2055708042, 2055708042, 2055708042, 2055708042,
    2055708042, 2055708042, 2055708042, 2055708042, 2055708042, 2055708042,
    2055708042, 2055708042, 2055708042, 2055708042
]


def group(list, n):  ##分组
    for i in range(0, len(list), n):
        yield list[i:i + n]


def xor(a, b):
    a1 = int(a, 16)
    b1 = int(b, 16)
    A = '{:08x}'.format(int(a1 ^ b1))
    return A


def left_hex(list, n):
    out1 = '{:032b}'.format(int(list, 16))
    out2 = out1[n:] + out1[:n]
    out_list = '{:08x}'.format(int(out2, 2))
    return out_list


def left_int(list, n):
    out1 = '{:032b}'.format(list)
    out2 = out1[n:] + out1[:n]
    out_list = int(out2, 2)
    return out_list


def FFj(X, Y, Z, j):
    if 0 <= j and j < 16:
        return X ^ Y ^ Z
    elif 16 <= j and j < 64:
        return (X & Y) | (X & Z) | (Y & Z)


def GGj(X, Y, Z, j):
    if 0 <= j and j < 16:
        return X ^ Y ^ Z
    elif 16 <= j and j < 64:
        return (X & Y) | ((~ X) & Z)


def P0(X):
    return X ^ left_int(X, 9) ^ left_int(X, 17)


def P1(X):
    return xor(xor(X, left_hex(X, 15)), left_hex(X, 23))


def CF(V, data):
    W = []
    W1 = []
    [W.append(data[i * 8:(i + 1) * 8]) for i in range(16)]
    for i in range(16, 68):
        w_in = xor(xor(P1(xor(xor(W[i - 16], W[i - 9]), left_hex(W[i - 3], 15))), left_hex(W[i - 13], 7)), W[i - 6])
        w_out = '{:08x}'.format(int(w_in, 16))
        W.append(w_out)
    [W1.append(xor(W[i], W[i + 4])) for i in range(64)]
    A, B, C, D, E, F, G, H = V
    for i in range(0, 64):
        ss1 = left_int((left_int(A, 12) + E + left_int(Tj[i], i % 32) & 0xffffffff), 7)
        ss2 = ss1 ^ (left_int(A, 12))
        tt1 = (FFj(A, B, C, i) + D + ss2 + int(W1[i], 16)) & 0xffffffff
        tt2 = (GGj(E, F, G, i) + H + ss1 + int(W[i], 16)) & 0xffffffff
        D = C
        C = left_int(B, 9)
        B = A
        A = tt1
        H = G
        G = left_int(F, 19)
        F = E
        E = P0(tt2)
    outV = [A ^ V[0], B ^ V[1], C ^ V[2], D ^ V[3], E ^ V[4], F ^ V[5], G ^ V[6], H ^ V[7]]
    return outV


def sm3(data):
    l = len(data) // 2
    byte = '{0:x}'.format(int(l * 8))
    data_list = []
    [data_list.append(i) for i in group(data, 128)]
    m = l % 64
    if m < 56 and m != 0:
        data_list[-1] = (data_list[-1] + '80').ljust(112, '0') + str(byte).rjust(16, '0')
    elif m >= 56:
        data_list[-1] = (data_list[-1] + '80').ljust(128, '0')
        data_list.append(112 * '0' + str(byte).rjust(16, '0'))
    elif m == 0:
        data_list.append('80' + 110 * '0' + str(byte).rjust(16, '0'))
        V = IV
    for i in range(0, len(data_list)):
        V = CF(V, data_list[i])
    for i in range(len(V)):
        V[i] = '{:08x}'.format(V[i])
    return ''.join(V)


def sm3_hmac(data, key):
    l = len(key) // 2
    if l > 64:
        key = sm3(key)
    else:
        pass
    key = key.ljust(128, '0')
    opad = '5c' * 64
    ipad = '36' * 64
    ipadkey = '%x' % (int(key, 16) ^ int(ipad, 16))
    M = sm3(ipadkey + data)
    opadkey = '%x' % (int(key, 16) ^ int(opad, 16))
    out_data = sm3(opadkey + M)
    return out_data