Python实现128-ECB 解密

from Crypto.Cipher import  AES as myaes
import  base64


class AESUtil:
    __BLOCK_SIZE_16 = BLOCK_SIZE_16 = myaes.block_size  #设置大小
    @staticmethod
    def encryt(str, key, iv):
        cipher = myaes.new(key, myaes.MODE_ECB,iv)
        x = AESUtil.__BLOCK_SIZE_16 - (len(str) % AESUtil.__BLOCK_SIZE_16) #16字节对齐
        if x != 0:
            str = str + chr(x)*x
        msg = cipher.encrypt(str)
        # msg = base64.urlsafe_b64encode(msg).replace('=', '')
        msg = base64.b64encode(msg)
        return msg

    @staticmethod
    def decrypt(enStr, key, iv):
        cipher = myaes.new(key.encode(), myaes.MODE_ECB)  #创建ecb模式
        # 要解密数据的时候我们事先数据已经经过base64编码过了. 所以这里解密成bytes进行解密.如果直接是bytes则不用这行代码了 所以这里需要先解码为bytes
        decryptByts = base64.b64decode(enStr)
        msg = cipher.decrypt(decryptByts)
        return msg

if __name__ == "__main__":
    key = "abcdefghiiiiiasd"
    iv = ""
    anc = AESUtil()
    #blob文件是加密之后的二进制转为的base64的字符串. 
    with ope("blob", 'rb') as f:
        data = f.read()
        res = anc.decrypt(data, key,iv);
        with open("blob1","wb") as w:
            w.write(res)