开发笔记:对称加密详解，以及JAVA简单实现

package com.lee;
public class Encryption {
public static void main(String[] args) {
String cOntent= "1234"; //需要加密的字符
String key = "abc"; //密钥
byte[] result = encryption(content, key);
System.out.println("1234加密后的值：" + new String(result));
System.out.println("---------------");
System.out.println("1234解密后的值：" +new String(decipher(new String(result), key)));
}
public static byte[] encryption(String content,String key){
byte[] cOntentBytes= content.getBytes();
byte[] keyBytes = key.getBytes();
byte dkey = 0;
for(byte b : keyBytes){
dkey ^= b;
}
byte salt = 0; //随机盐值
byte[] result = new byte[contentBytes.length];
for(int i = 0 ; i salt = (byte)(contentBytes[i] ^ dkey ^ salt);
result[i] = salt;
}
return result;
}
public static byte[] decipher(String content,String key){
byte[] cOntentBytes= content.getBytes();
byte[] keyBytes = key.getBytes();
byte dkey = 0;
for(byte b : keyBytes){
dkey ^= b;
}
byte salt = 0; //随机盐值
byte[] result = new byte[contentBytes.length];
for(int i = contentBytes.length - 1 ; i >= 0 ; i--){
if(i == 0){
salt = 0;
}else{
salt = contentBytes[i - 1];
}
result[i] = (byte)(contentBytes[i] ^ dkey ^ salt);
}
return result;
}
}