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aes_decryptor.py
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aes_decryptor.py
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from Crypto.Cipher import AES
from binascii import b2a_hex, a2b_hex
class Prpcrypt():
def __init__(self):
self.key = 'eCcGFZQj6PNoSSma31LR39rTzTbLkU8E'.encode('utf-8')
self.mode = AES.MODE_CBC
#加密函数,如果text不足16位就用空格补足为16位,
#如果大于16当时不是16的倍数,那就补足为16的倍数。
def encrypt(self,text):
cryptor = AES.new(self.key,self.mode,b'0000000000000000')
#这里密钥key 长度必须为16(AES-128),
#24(AES-192),或者32 (AES-256)Bytes 长度
#目前AES-128 足够目前使用
length = 16
count = len(text)
if count < length:
add = (length-count)
#\0 backspace
text = text + ('\0' * add)
elif count > length:
add = (length-(count % length))
text = text + ('\0' * add)
self.ciphertext = cryptor.encrypt(text.encode('utf-8'))
#因为AES加密时候得到的字符串不一定是ascii字符集的,输出到终端或者保存时候可能存在问题
#所以这里统一把加密后的字符串转化为16进制字符串
return b2a_hex(self.ciphertext).decode(encoding='utf-8')
#解密后,去掉补足的空格用strip() 去掉
def decrypt(self,text):
cryptor = AES.new(self.key,self.mode,b'0000000000000000')
plain_text = cryptor.decrypt(a2b_hex(text))
return plain_text.decode().rstrip('\0')
if __name__ == '__main__':
pc = Prpcrypt() #初始化密钥
e = pc.encrypt('123456') #加密
d = pc.decrypt(e) #解密
print("加密:",str(e))
print("解密:",str(d))