据师父和自己的刷题感觉到了：还是要把每个典型加密算法原理什么的搞清楚，可以自己敲代码实现

一，TEA加密

def encrypt(v, k):
    v0 = c_uint32(v[0**])**
    v1 = c_uint32(v[1])
    sum1 = c_uint32(0)
    delta = 195935983
    for i in range(32):
        v0.value += (v1.value << 4 ^ v1.value >> 7) + v1.value ^ sum1.value + k[sum1.value & 3]
        sum1.value += delta
        v1.value += (v0.value << 4 ^ v0.value >> 7) + v0.value ^ sum1.value + k[sum1.value >> 9 & 3]

    return (
     v0.value, v1.value)


if __name__ == "__main__":
    flag = input("please input your flag:")
    k = [255, 187, 51, 68]
    if len(flag) != 32:
        print("wrong!")
        exit(-1)
    a = []
    for i in range(0, 32, 8):
        v1 = bytes_to_long(bytes(flag[i:i + 4], "ascii"))
        v2 = bytes_to_long(bytes(flag[i + 4:i + 8], "ascii"))
        a += encrypt([v1, v2], k)

    enc = [
     4006073346, 2582197823, 2235293281, 558171287, 2425328816,
     1715140098, 986348143, 1948615354]
    for i in range(8):
        if enc[i] != a[i]:
            print("wrong!")
            exit(-1)

    print("flag is flag{%s}" % flag)

二，RC4加密