#!/usr/bin/env python #encoding=‘utf-8’ from Crypto.Cipher import AES from binascii import b2a_hex, a2b_hex from Crypto import Random class PrpCrypt(object): def __init__(self, key): self.key = key.encode('utf-8') self.mode = AES.MODE_CBC self.iv = Random.new().read(AES.block_size) # 加密函數,如果text不足16位就用空格補足為16位, # 如果大於16當時不是16的倍數,那就補足為16的倍數。 def encrypt(self, text): text = text.encode('utf-8') cryptor = AES.new(self.key, self.mode,self.iv) # 這里密鑰key 長度必須為16(AES-128), # 24(AES-192),或者32 (AES-256)Bytes 長度 # 目前AES-128 足夠目前使用 length = 16 count = len(text) if count < length: add = (length - count) # \0 backspace # text = text + ('\0' * add) text = text + ('\0' * add).encode('utf-8') elif count > length: add = (length - (count % length)) # text = text + ('\0' * add) text = text + ('\0' * add).encode('utf-8') self.ciphertext = cryptor.encrypt(text) # 因為AES加密時候得到的字符串不一定是ascii字符集的,輸出到終端或者保存時候可能存在問題 # 所以這里統一把加密后的字符串轉化為16進制字符串 return b2a_hex(self.ciphertext) # 解密后,去掉補足的空格用strip() 去掉 def decrypt(self, text): cryptor = AES.new(self.key, self.mode, self.iv) plain_text = cryptor.decrypt(a2b_hex(text)) # return plain_text.rstrip('\0') return bytes.decode(plain_text).rstrip('\0') if __name__ == '__main__': pc = PrpCrypt('0CoJUm6Qyw8W8jud') # 初始化密鑰 data = input("請輸入待加密數據:")# e = pc.encrypt(data) # 加密 d = pc.decrypt(e).encode() # 解密 print("加密:", e) print("解密:", d)