apply plugin: 'org.springframework.boot'
apply plugin: 'java'
apply plugin: 'kotlin'//notice


dependencies {
    implementation fileTree(dir: "libs", include: ["*.jar"])
    compile 'org.springframework.boot:spring-boot-starter:2.3.4.RELEASE'
    compile 'org.springframework.boot:spring-boot-starter-web:2.3.4.RELEASE'
    compile   "org.jetbrains.kotlin:kotlin-stdlib-jdk8:1.3.72"//notice
}

apply plugin: 'org.springframework.boot'
apply plugin: 'java'


dependencies {
    implementation fileTree(dir: "libs", include: ["*.jar"])
    compile 'org.springframework.boot:spring-boot-starter:2.3.4.RELEASE'
    compile 'org.springframework.boot:spring-boot-starter-web:2.3.4.RELEASE'
}

import binascii
from pyDes import des, CBC, PAD_PKCS5


def des_encrypt(s):
    """
    DES 加密
    :param s: 原始字符串
    :return: 加密后字符串，16进制
    """
    secret_key = '20171117'
    iv = secret_key
    k = des(secret_key, CBC, iv, pad=None, padmode=PAD_PKCS5)
    en = k.encrypt(s, padmode=PAD_PKCS5)
    return binascii.b2a_hex(en)


def des_descrypt(s):
    """
    DES 解密
    :param s: 加密后的字符串，16进制
    :return:  解密后的字符串
    """
    secret_key = '20171117'
    iv = secret_key
    k = des(secret_key, CBC, iv, pad=None, padmode=PAD_PKCS5)
    de = k.decrypt(binascii.a2b_hex(s), padmode=PAD_PKCS5)
    return de


str_en = des_encrypt('zx')
print(str_en)
str_de = des_descrypt(str_en)
print(str_de)

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


public class Main {

    public static void main(String[] args) {
        String content = "zx";
        String key = "20171117";

        System.out.println("加密前：" + content);
        byte[] encrypted = DES_CBC_Encrypt(content.getBytes(), key.getBytes());
        System.out.println("加密后：" + byteToHexString(encrypted));

        byte[] decrypted = DES_CBC_Decrypt(encrypted, key.getBytes());
        System.out.println("解密后：" + new String(decrypted));
    }

    public static byte[] DES_CBC_Encrypt(byte[] content, byte[] keyBytes) {
        try {
            DESKeySpec keySpec = new DESKeySpec(keyBytes);
            SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
            SecretKey key = keyFactory.generateSecret(keySpec);

            Cipher cipher = Cipher.getInstance("DES/CBC/PKCS5Padding");
            cipher.init(Cipher.ENCRYPT_MODE, key, new IvParameterSpec(keySpec.getKey()));
            byte[] result = cipher.doFinal(content);
            return result;
        } catch (Exception e) {
            System.out.println("exception:" + e.toString());
        }
        return null;
    }

    private static byte[] DES_CBC_Decrypt(byte[] content, byte[] keyBytes) {
        try {
            DESKeySpec keySpec = new DESKeySpec(keyBytes);
            SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
            SecretKey key = keyFactory.generateSecret(keySpec);

            Cipher cipher = Cipher.getInstance("DES/CBC/PKCS5Padding");
            cipher.init(Cipher.DECRYPT_MODE, key, new IvParameterSpec(keyBytes));
            byte[] result = cipher.doFinal(content);
            return result;
        } catch (Exception e) {
            System.out.println("exception:" + e.toString());
        }
        return null;
    }

    private static String byteToHexString(byte[] bytes) {
        StringBuffer sb = new StringBuffer(bytes.length);
        String sTemp;
        for (int i = 0; i < bytes.length; i++) {
            sTemp = Integer.toHexString(0xFF & bytes[i]);
            if (sTemp.length() < 2)
                sb.append(0);
            sb.append(sTemp.toUpperCase());
        }
        return sb.toString();
    }
}

s = "Hello, world!"   # str object 

#一共有三种方式 任选其一
print('str --> bytes')
print(bytes(s, encoding="utf8"))    
print(str.encode(s))   # 默认 encoding="utf-8"
print(s.encode())      # 默认 encoding="utf-8"

b = b"Hello, world!"  # bytes object  

#一共有三种方式 任选其一
print('\nbytes --> str')
print(str(b, encoding="utf-8"))   
print(bytes.decode(b))  # 默认 encoding="utf-8"
print(b.decode())       # 默认 encoding="utf-8"

from pyDes import des, ECB, PAD_PKCS5


def des_encrypt(s):
    """
    DES 加密
    :param s: 原始字符串
    :return: 加密后字符串，16进制
    """
    secret_key = 'ucserver'.encode()

    k = des(secret_key, ECB, pad=None, padmode=PAD_PKCS5)
    en = k.encrypt(s.encode(), padmode=PAD_PKCS5)
    # return binascii.b2a_hex(en)
    return base64.b64encode(en).decode()


def des_descrypt(s):
    """
    DES 解密
    :param s: 加密后的字符串，16进制
    :return:  解密后的字符串
    """
    secret_key = 'ucserver'.encode()
 
    k = des(secret_key, ECB, pad=None, padmode=PAD_PKCS5)
    de = k.decrypt(base64.b64decode(s), padmode=PAD_PKCS5)
    return de.decode()