我在java中有一个blowfish的遗留实现,我正试图将其移植到Python。
Java:
import blowfishj.*;
import org.apache.commons.codec.binary.Hex;
private static byte[] EncryptBlowFish(byte[] sStr, String sSecret) {
byte[] key = sSecret.getBytes();
byte[] cipher = new byte[sStr.length];
BlowfishECB blowfish = new BlowfishECB(key, 0, key.length);
blowfish.encrypt(sStr, 0, cipher, 0, sStr.length);
return (new String(Hex.encodeHex(cipher)));
}
Python:
from Crypto.Cipher import Blowfish
import binascii
def encrypt(encr_str, key_str):
cipher = Blowfish.new(key_str, Blowfish.MODE_ECB)
return binascii.hexlify(cipher.encrypt(encr_str)).decode('utf-8')
如果要加密的字符串是"12345678",密钥是"1234567490123456",则java代码输出"e00723bb58234aa",python代码输出"61d2570dc6e09632"。
由于java代码是遗留的,我不能碰它。这表明pycrypto的blowfish实现存在问题。然而,我可以确认这里接受的答案是有效的。但不知道为什么。我尝试了pycrypto和这个blowfish模块,得到了相同的结果。
有什么想法可以在Python中复制与遗留java代码相同的blowfish输出吗?
所有的功劳都归功于@Kai Iskratsch,因为他指向了正确的方向。
参考:
-
什么';Blowfish和Blowfish的同胞有什么区别?
-
https://gist.github.com/adamb70/1f140573b37939e78eb5%22
这是对我有效的代码。
Python:
from Crypto.Cipher import Blowfish
from binascii import hexlify
def encrypt(key, string):
"""
Encrypts input string using BlowFish-Compat ECB algorithm.
:param key: secret key
:param string: string to encrypt
:return: encrypted string
"""
cipher = Blowfish.new(key, Blowfish.MODE_ECB)
return hexlify(_reverse_bytes(cipher.encrypt(_reverse_bytes(string)))).decode('utf-8')
@staticmethod
def _reverse_bytes(data):
"""
Takes data and reverses byte order to fit blowfish-compat format. For example, using _reverse_bytes('12345678')
will return 43218765.
:param data as bytes
:return: reversed bytes
"""
data_size = 0
for n in data:
data_size += 1
reversed_bytes = bytearray()
i = 0
for x in range(0, data_size // 4):
a = (data[i:i + 4])
i += 4
z = 0
n0 = a[z]
n1 = a[z + 1]
n2 = a[z + 2]
n3 = a[z + 3]
reversed_bytes.append(n3)
reversed_bytes.append(n2)
reversed_bytes.append(n1)
reversed_bytes.append(n0)
return bytes(reversed_bytes)