ASE 按著網上敲，後來出了錯知道，ASE 加密前自動補全，解密，也要按著相應的規則解碼

這是我找的blog

http://bbs.csdn.net/topics/360143510

這是之前找到

程式碼結構比較清新

http://blog.csdn.net/mazhidong/article/details/60666977

這是我的程式碼

package com.org.root;
import javax.crypto.*;
import javax.crypto.spec.SecretKeySpec;
import java.io.UnsupportedEncodingException;
 
import java.security.InvalidKeyException;
import java.security.Key;
import java.security.NoSuchAlgorithmException;
import java.security.SecureRandom;
public class AESTool {

    /**
     * 加密
* @param
* @param password
* @return
* @throws NoSuchAlgorithmException
     * @throws NoSuchPaddingException
 
     * @throws UnsupportedEncodingException
     * @throws InvalidKeyException
     * @throws BadPaddingException
     * @throws IllegalBlockSizeException
     */
public static Key initKeyForAES(String password) throws NoSuchAlgorithmException {
        if (null == password || password.length() == 0) {
            throw new 
 
NullPointerException("key not is null");
}
        SecretKeySpec key = null;
SecureRandom random = SecureRandom.getInstance("SHA1PRNG");
random.setSeed(password.getBytes());
        try {
            KeyGenerator kgen = KeyGenerator.getInstance("AES");
kgen.init(128, random);
SecretKey secretKey = kgen.generateKey();
            byte[] enCodeFormat = secretKey.getEncoded();
key = new SecretKeySpec(enCodeFormat, "AES");
} catch (NoSuchAlgorithmException ex) {
            throw new NoSuchAlgorithmException();
}
        return key;
}

    public static byte[] encrypt (String content, String password) throws NoSuchAlgorithmException, NoSuchPaddingException, UnsupportedEncodingException, InvalidKeyException, BadPaddingException, IllegalBlockSizeException {






        Key key = initKeyForAES("root");
Cipher cipher = Cipher.getInstance("AES");// 建立密碼器
byte[] byteContent = content.getBytes("utf-8");
cipher.init(Cipher.ENCRYPT_MODE, key);// 初始化為加密模式的密碼器
byte[] result = cipher.doFinal(byteContent);// 加密
return result;
}


    public static byte[] decrypt (byte[] content, String password) throws NoSuchAlgorithmException, NoSuchPaddingException, InvalidKeyException, BadPaddingException, IllegalBlockSizeException {



        Key key = initKeyForAES("root");
Cipher cipher = Cipher.getInstance("AES");// 建立密碼器
cipher.init(Cipher.DECRYPT_MODE, key);// 初始化為加密模式的密碼器
byte[] result = cipher.doFinal(content);// 加密
return result;
}


}

package com.org.root;
public class ParseSystemUtil {

    /**將二進位制轉換成16進位制
* @param buf
* @return
*/
public static String parseByte2HexStr(byte buf[]) {
        StringBuffer sb = new StringBuffer();
        for (int i = 0; i < buf.length; i++) {
            String hex = Integer.toHexString(buf[i] & 0xFF);
            if (hex.length() == 1) {
                hex = '0' + hex;
}
            sb.append(hex.toUpperCase());
}
        return sb.toString();
}

    /**將16進位制轉換為二進位制
* @param hexStr
* @return
*/
public static byte[] parseHexStr2Byte(String hexStr) {
        if (hexStr.length() < 1)
            return null;
        byte[] result = new byte[hexStr.length()/2];
        for (int i = 0;i< hexStr.length()/2; i++) {
            int high = Integer.parseInt(hexStr.substring(i*2, i*2+1), 16);
            int low = Integer.parseInt(hexStr.substring(i*2+1, i*2+2), 16);
result[i] = (byte) (high * 16 + low);
}
        return result;
}
}

========

package com.org.root;
import javax.crypto.BadPaddingException;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.NoSuchPaddingException;
import java.io.UnsupportedEncodingException;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
public class Imple {
    public static void main(String[] args) throws NoSuchPaddingException, BadPaddingException, NoSuchAlgorithmException,
IllegalBlockSizeException, UnsupportedEncodingException, InvalidKeyException {

        String content = "美女，約嗎？";
String password = "123";
System.out.println("加密之前：" + content);
// 加密
byte[] encrypt = AESTool.encrypt(content, password);
System.out.println("加密後的內容：" + new String(encrypt));
String hexStrResult = ParseSystemUtil.parseByte2HexStr(encrypt);
System.out.println("16進位制的密文："  + hexStrResult);
        byte[] twoStrResult = ParseSystemUtil.parseHexStr2Byte(hexStrResult);
System.out.println(new String(twoStrResult));
// 解密
byte[] decrypt = AESTool.decrypt(encrypt, password);
System.out.println("解密後的內容：" + new String(decrypt));
}



}