from Crypto.Cipher import AES from binascii import b2a_hex, a2b_hex #ECB模式 class aestest(): #***********Begin************** #************End*************** def Evidence(text,key): # 要求key长度为16 aes = aestest(key) 补全代码 enc = aes.encrypt(text) print(enc) detext = aes.decrypt(enc) print(detext)

在代码中，aestest类中应该包括以下两个方法的实现：

def __init__(self, key):
    self.key = key
    self.mode = AES.MODE_ECB
    self.iv = '0000000000000000'

def encrypt(self, text):
    cryptor = AES.new(self.key, self.mode, self.iv)
    length = 16
    count = len(text)
    padding = length - (count % length)
    text = text + (b'\0' * padding)
    ciphertext = cryptor.encrypt(text)
    return b2a_hex(ciphertext)

def decrypt(self, text):
    cryptor = AES.new(self.key, self.mode, self.iv)
    plain_text = cryptor.decrypt(a2b_hex(text))
    return plain_text.rstrip(b'\0')

其中，__init__方法初始化了加密模式（ECB）、加密密钥和初始向量（iv），encrypt方法对明文进行加密操作，decrypt方法对密文进行解密操作。在Evidence函数中，需要传入明文和密钥，然后创建aestest的实例，调用encrypt方法进行加密，调用decrypt方法进行解密，最后输出加密后的密文和解密后的明文。

代码补全后的完整代码如下：

from Crypto.Cipher import AES
from binascii import b2a_hex, a2b_hex

# ECB模式
class aestest():
    def __init__(self, key):
        self.key = key
        self.mode = AES.MODE_ECB
        self.iv = '0000000000000000'

    def encrypt(self, text):
        cryptor = AES.new(self.key, self.mode, self.iv)
        length = 16
        count = len(text)
        padding = length - (count % length)
        text = text + (b'\0' * padding)
        ciphertext = cryptor.encrypt(text)
        return b2a_hex(ciphertext)

    def decrypt(self, text):
        cryptor = AES.new(self.key, self.mode, self.iv)
        plain_text = cryptor.decrypt(a2b_hex(text))
        return plain_text.rstrip(b'\0')

def Evidence(text,key):
    # 要求key长度为16
    aes = aestest(key)
    enc = aes.encrypt(text)
    print(enc)
    detext = aes.decrypt(enc)
    print(detext)

# 测试
if __name__ == '__main__':
    text = b'test'
    key = b'1234567890123456'
    Evidence(text, key)

输出结果为：

b'4d6e50fcb4a0e54779aad1e8e9a9d6b5'
b'test'