def is_true(a, b):
    a = a & 3
    b = b & 3
    return a & b != 0

def verify_cipherSuite(a, b):
    a=int.from_bytes(a,'big')
    b=int.from_bytes(b,'big')

    if (is_true(a, b) and is_true(a >> 4, b >> 4) and is_true(a >> 6, b >> 6)==False):
        raise Exception('密码算法 cipherSuite 错误')

def verify_handshake(a,b):
    if a!=b:
        raise Exception('握手认证错误')

def verify_error(a):
    if a[0]==0x88:
        raise Exception('收到报错信息')