DES加密的问题 2017-07-28更新 之前问题:今天遇到一个接口,要求对参数进行DES加密报错-问答-阿里云开发者社区-阿里云

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DES加密的问题 2017-07-28更新 之前问题:今天遇到一个接口,要求对参数进行DES加密报错

因为相信,所以看见。 2020-05-26 13:56:09 159

关于DES加密的问题 2017-07-28更新 之前问题:今天遇到一个接口,要求对参数进行DES加密,而我之前没搞过这个东西,所以有问题要请教各位大神,python应该怎么实现跟java一样的加密方法。 image.png

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2017-07-28更新

我看java文件里


这地方明明是随机产生的key,为什么我输出看看一直是同一个东西?

之前问题:今天遇到一个接口,要求对参数进行DES加密,而我之前没搞过这个东西,所以有问题要请教各位大神,python应该怎么实现跟java一样的加密方法。

之前是被对方误导了,经我查看java代码,发现是下面的加密方法。2017-07-24更新求助。
附上对方提供的java代码

import java.security.SecureRandom;

import javax.crypto.Cipher;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.DESKeySpec;

public class DesUtils {
    public DesUtils() {
    }

    private final static String ALGORITHM = "DES";

    public static void main(String[] args) throws Exception {

        final String PASSWORD_CRYPT_KEY = "kEHrDooxWHCWtfeSxvDvgqZq";
        String str="abcdefghi";
        str = DesUtils.encrypt(str, PASSWORD_CRYPT_KEY);
        System.out.println("str: " + str);
    }


    public final static String decrypt(String data, String pwd)
            throws Exception {
        return new String(decrypt(hex2byte(data.getBytes()), pwd.getBytes()));
    }


    public final static String encrypt(String data, String pwd)
            throws Exception {
        return byte2hex(encrypt(data.getBytes(), pwd.getBytes()));
    }


    private static byte[] encrypt(byte[] data, byte[] key) throws Exception {

        SecureRandom sr = new SecureRandom();
        System.out.println("iv1: " + sr.toString());
        DESKeySpec dks = new DESKeySpec(key);


        SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(ALGORITHM);
        SecretKey securekey = keyFactory.generateSecret(dks);

        Cipher cipher = Cipher.getInstance(ALGORITHM);
        System.out.println("SECRECT: " + securekey);
        cipher.init(Cipher.ENCRYPT_MODE, securekey, sr);

        return cipher.doFinal(data);
    }

    private static byte[] decrypt(byte[] data, byte[] key) throws Exception {

        SecureRandom sr = new SecureRandom();
        System.out.println("iv2: " + sr);
        DESKeySpec dks = new DESKeySpec(key);

        SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(ALGORITHM);
        SecretKey securekey = keyFactory.generateSecret(dks);

        Cipher cipher = Cipher.getInstance(ALGORITHM);

        cipher.init(Cipher.DECRYPT_MODE, securekey, sr);

        return cipher.doFinal(data);
    }

    public static byte[] hex2byte(byte[] b) {
        if ((b.length % 2) != 0)
            throw new IllegalArgumentException("fault lentgh");
        byte[] b2 = new byte[b.length / 2];
        for (int n = 0; n < b.length; n += 2) {
            String item = new String(b, n, 2);
            b2[n / 2] = (byte) Integer.parseInt(item, 16);
        }
        return b2;
    }

    public static String byte2hex(byte[] b) {
        String hs = "";
        String stmp = "";
        for (int n = 0; n < b.length; n++) {
            stmp = (java.lang.Integer.toHexString(b[n] & 0XFF));
            if (stmp.length() == 1)
                hs = hs + "0" + stmp;
            else
                hs = hs + stmp;
        }
        return hs.toUpperCase();
    }
}
" ![image.png](https://ucc.alicdn.com/pic/developer-ecology/80e9b31e88e74fa08a1928fefec94090.png)
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  • 因为相信,所以看见。
    2020-05-27 10:17:13

    "

    应该是不通用的DES加密 让他们给代码,不给的话让他们给出对某个字符串加密后的结果

    ######
    import base64 import hashlib from Crypto import Random from Crypto.Cipher import AES

    class AESCipher(object):

    def __init__(self, key): 
        self.bs = 32
        self.key = hashlib.sha256(key.encode()).digest()
    
    def encrypt(self, raw):
        raw = self._pad(raw)
        iv = Random.new().read(AES.block_size)
        cipher = AES.new(self.key, AES.MODE_CBC, iv)
        return base64.b64encode(iv + cipher.encrypt(raw))
    
    def decrypt(self, enc):
        enc = base64.b64decode(enc)
        iv = enc[:AES.block_size]
        cipher = AES.new(self.key, AES.MODE_CBC, iv)
        return self._unpad(cipher.decrypt(enc[AES.block_size:])).decode('utf-8')
    
    def _pad(self, s):
        return s + (self.bs - len(s) % self.bs) * chr(self.bs - len(s) % self.bs)
    
    @staticmethod
    def _unpad(s):
        return s[:-ord(s[len(s)-1:])]</code></pre>"
    

    image.png

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