●  BASE64 严格地说，属于编码格式，而非加密算法
    ●  MD5(Message Digest algorithm 5，信息摘要算法)
    ●  SHA(Secure Hash Algorithm，安全散列算法)
    ●  HMAC(Hash Message Authentication Code，散列消息鉴别码)复杂的对称加密（DES、PBE）、非对称加密算法：
    ●  DES(Data Encryption Standard，数据加密算法)
    ●  PBE(Password-based encryption，基于密码验证)
    ●  RSA(算法的名字以发明者的名字命名：Ron Rivest, AdiShamir 和Leonard Adleman)
    ●  DH(Diffie-Hellman算法，密钥一致协议)
    ●  DSA(Digital Signature Algorithm，数字签名)
    ●  ECC(Elliptic Curves Cryptography，椭圆曲线密码编码学)[/size]

http://www.java2s.com/Code/Java/Security/CatalogSecurity.htm

Java Base64、SHA1、MD5、HMAC（非对称）

AES、DES、3DES对称)

加密算法

package com.example.decript;

import java.io.UnsupportedEncodingException;

import java.security.InvalidKeyException;

import java.security.MessageDigest;

import java.security.NoSuchAlgorithmException;

import java.security.SecureRandom;

import javax.crypto.BadPaddingException;

import javax.crypto.Cipher;

import javax.crypto.IllegalBlockSizeException;

import javax.crypto.KeyGenerator;

import javax.crypto.NoSuchPaddingException;

import javax.crypto.SecretKey;

import javax.crypto.spec.SecretKeySpec;

public class DecriptTest {

// sun不推荐使用它们自己的base64,用apache的挺好
/**
* BASE64解密
*/
public static byte[] decryptBASE64(byte[] dest) {
if (dest == null) {
return null;
}
return Base64.decodeBase64(dest);
}

/**
* BASE64加密
*/
public static byte[] encryptBASE64(byte[] origin) {
if (origin == null) {
return null;
}
return Base64.encodeBase64(origin);
}

    public static String SHA1(String decript) {

        try {

            MessageDigest digest = java.security.MessageDigest

                    .getInstance("SHA-1");

            digest.update(decript.getBytes());

            byte messageDigest[] = digest.digest();

            // Create Hex String

            StringBuffer hexString = new StringBuffer();

            // 字节数组转换为 十六进制 数

            for (int i = ; i < messageDigest.length; i++) {

                String shaHex = Integer.toHexString(messageDigest[i] & 0xFF);

                if (shaHex.length() < ) {

                    hexString.append();

                }

                hexString.append(shaHex);

            }

            return hexString.toString();

        } catch (NoSuchAlgorithmException e) {

            e.printStackTrace();

        }

        return "";

    }

    public static String SHA(String decript) {

        try {

            MessageDigest digest = java.security.MessageDigest

                    .getInstance("SHA");

            digest.update(decript.getBytes());

            byte messageDigest[] = digest.digest();

            // Create Hex String

            StringBuffer hexString = new StringBuffer();

            // 字节数组转换为 十六进制 数

            for (int i = ; i < messageDigest.length; i++) {

                String shaHex = Integer.toHexString(messageDigest[i] & 0xFF);

                if (shaHex.length() < ) {

                    hexString.append();

                }

                hexString.append(shaHex);

            }

            return hexString.toString();

        } catch (NoSuchAlgorithmException e) {

            e.printStackTrace();

        }

        return "";

    }

    public static String MD5(String input) {

        try {

            // 获得MD5摘要算法的 MessageDigest 对象

            MessageDigest mdInst = MessageDigest.getInstance("MD5");

            // 使用指定的字节更新摘要

            mdInst.update(input.getBytes());

            // 获得密文

            byte[] md = mdInst.digest();

            // 把密文转换成十六进制的字符串形式

            StringBuffer hexString = new StringBuffer();

            // 字节数组转换为 十六进制 数

            for (int i = ; i < md.length; i++) {

                String shaHex = Integer.toHexString(md[i] & 0xFF);

                if (shaHex.length() < ) {

                    hexString.append();

                }

                hexString.append(shaHex);

            }

            return hexString.toString();

        } catch (NoSuchAlgorithmException e) {

            e.printStackTrace();

        }

        return "";

    }

　　　　

/**
* 初始化HMAC密钥
*
* @throws NoSuchAlgorithmException
*/
public static String initMacKey() throws NoSuchAlgorithmException {
KeyGenerator keyGenerator = KeyGenerator.getInstance(KEY_MAC);
SecretKey secretKey = keyGenerator.generateKey();
return new String(encryptBASE64(secretKey.getEncoded()));
}

/**
* HMAC加密
*
* @throws NoSuchAlgorithmException
* @throws InvalidKeyException
*/
public static byte[] encryptHMAC(byte[] data, String key)
throws NoSuchAlgorithmException, InvalidKeyException {
SecretKey secretKey = new SecretKeySpec(decryptBASE64(key.getBytes()),
KEY_MAC);
Mac mac = Mac.getInstance(secretKey.getAlgorithm());
mac.init(secretKey);
return mac.doFinal(data);

}

    /**

     * 加密

     *

     * @param content

     *            需要加密的内容

     * @param password

     *            加密密码

     * @return

     */

    public static byte[] encryptAES(String content, String password) {

        try {

            KeyGenerator kgen = KeyGenerator.getInstance("AES");

            kgen.init(, new SecureRandom(password.getBytes()));

            SecretKey secretKey = kgen.generateKey();

            byte[] enCodeFormat = secretKey.getEncoded();

            SecretKeySpec key = new SecretKeySpec(enCodeFormat, "AES");

            Cipher cipher = Cipher.getInstance("AES");// 创建密码器

            byte[] byteContent = content.getBytes("utf-8");

            cipher.init(Cipher.ENCRYPT_MODE, key);// 初始化

            byte[] result = cipher.doFinal(byteContent);

            return result; // 加密

        } catch (NoSuchAlgorithmException e) {

            e.printStackTrace();

        } catch (NoSuchPaddingException e) {

            e.printStackTrace();

        } catch (InvalidKeyException e) {

            e.printStackTrace();

        } catch (UnsupportedEncodingException e) {

            e.printStackTrace();

        } catch (IllegalBlockSizeException e) {

            e.printStackTrace();

        } catch (BadPaddingException e) {

            e.printStackTrace();

        }

        return null;

    }

    /**

     * 解密

     *

     * @param content

     *            待解密内容

     * @param password

     *            解密密钥

     * @return

     */

    public static byte[] decryptAES(byte[] content, String password) {

        try {

            KeyGenerator kgen = KeyGenerator.getInstance("AES");

            kgen.init(, new SecureRandom(password.getBytes()));

            SecretKey secretKey = kgen.generateKey();

            byte[] enCodeFormat = secretKey.getEncoded();

            SecretKeySpec key = new SecretKeySpec(enCodeFormat, "AES");

            Cipher cipher = Cipher.getInstance("AES");// 创建密码器

            cipher.init(Cipher.DECRYPT_MODE, key);// 初始化

            byte[] result = cipher.doFinal(content);

            return result; // 加密

        } catch (NoSuchAlgorithmException e) {

            e.printStackTrace();

        } catch (NoSuchPaddingException e) {

            e.printStackTrace();

        } catch (InvalidKeyException e) {

            e.printStackTrace();

        } catch (IllegalBlockSizeException e) {

            e.printStackTrace();

        } catch (BadPaddingException e) {

            e.printStackTrace();

        }

        return null;

    }

}

///////////////////////////////DES////////////////////////////////////////

    // test:

    //String source = "amigoxie";

    //        System.out.println("原文: " + source);

    //    String key = "A1B2C3D4E5F60708";

    //    String encryptData;

    //    try {

    //        encryptData = encrypt(source, key);

    //        System.out.println("加密后: " + encryptData);

    //        String decryptData = decrypt(encryptData, key);

    //        System.out.println("解密后: " + decryptData);

    //    } catch (Exception e) {

    //        // TODO Auto-generated catch block

    //        e.printStackTrace();

    //    }                

     //算法名称

    public static final String KEY_ALGORITHM = "DES";

    //算法名称/加密模式/填充方式

    //DES共有四种工作模式-->>ECB：电子密码本模式、CBC：加密分组链接模式、CFB：加密反馈模式、OFB：输出反馈模式

    public static final String CIPHER_ALGORITHM = "DES/ECB/NoPadding";

    /**

     *

     * 生成密钥key对象

     * @param KeyStr 密钥字符串

     * @return 密钥对象

     * @throws InvalidKeyException

     * @throws NoSuchAlgorithmException

     * @throws InvalidKeySpecException

     * @throws Exception

     */

    private static SecretKey keyGenerator(String keyStr) throws Exception {

        byte input[] = HexString2Bytes(keyStr);

        DESKeySpec desKey = new DESKeySpec(input);

        //创建一个密匙工厂，然后用它把DESKeySpec转换成

        SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");

        SecretKey securekey = keyFactory.generateSecret(desKey);

        return securekey;

    }

    private static int parse(char c) {

        if (c >= 'a') return (c - 'a' + ) & 0x0f;

        if (c >= 'A') return (c - 'A' + ) & 0x0f;

        return (c - '') & 0x0f;

    }

    // 从十六进制字符串到字节数组转换

    public static byte[] HexString2Bytes(String hexstr) {

        byte[] b = new byte[hexstr.length() / ];

        int j = ;

        for (int i = ; i < b.length; i++) {

            char c0 = hexstr.charAt(j++);

            char c1 = hexstr.charAt(j++);

            b[i] = (byte) ((parse(c0) << ) | parse(c1));

        }

        return b;

    }

    /**

     * 加密数据

     * @param data 待加密数据

     * @param key 密钥

     * @return 加密后的数据

     */

    public static String encrypt(String data, String key) throws Exception {

        Key deskey = keyGenerator(key);

        // 实例化Cipher对象，它用于完成实际的加密操作

        Cipher cipher = Cipher.getInstance(CIPHER_ALGORITHM);

        SecureRandom random = new SecureRandom();

        // 初始化Cipher对象，设置为加密模式

        cipher.init(Cipher.ENCRYPT_MODE, deskey, random);

        byte[] results = cipher.doFinal(data.getBytes());

        // 该部分是为了与加解密在线测试网站（http://tripledes.online-domain-tools.com/）的十六进制结果进行核对

        for (int i = ; i < results.length; i++) {

            System.out.print(results[i] + " ");

        }

        System.out.println();

        // 执行加密操作。加密后的结果通常都会用Base64编码进行传输

        return Base64.encodeBase64String(results);

    }

    /**

     * 解密数据

     * @param data 待解密数据

     * @param key 密钥

     * @return 解密后的数据

     */

    public static String decrypt(String data, String key) throws Exception {

        Key deskey = keyGenerator(key);

        Cipher cipher = Cipher.getInstance(CIPHER_ALGORITHM);

        //初始化Cipher对象，设置为解密模式

        cipher.init(Cipher.DECRYPT_MODE, deskey);

        // 执行解密操作

        return new String(cipher.doFinal(Base64.decodeBase64(data)));

    }

///////////////////////////////DES////////////////////////////////////////

/////////////////////////////////////////////////3DES///////////////////////////////////////////////////////

    // 算法名称

    public static final String KEY_ALGORITHM = "desede";

    // 算法名称/加密模式/填充方式

    public static final String CIPHER_ALGORITHM = "desede/CBC/NoPadding";

    /**

     * CBC加密

     * @param key 密钥

     * @param keyiv IV

     * @param data 明文

     * @return Base64编码的密文

     * @throws Exception

     */

    public static byte[] des3EncodeCBC(byte[] key, byte[] keyiv, byte[] data) throws Exception {

        Security.addProvider(new BouncyCastleProvider());

        Key deskey = keyGenerator(new String(key));

        Cipher cipher = Cipher.getInstance(CIPHER_ALGORITHM);

        IvParameterSpec ips = new IvParameterSpec(keyiv);

        cipher.init(Cipher.ENCRYPT_MODE, deskey, ips);

        byte[] bOut = cipher.doFinal(data);

        for (int k = ; k < bOut.length; k++) {

            System.out.print(bOut[k] + " ");

        }

        System.out.println("");

        return bOut;

    }

    /**

     *

     * 生成密钥key对象

     * @param KeyStr 密钥字符串

     * @return 密钥对象

     * @throws InvalidKeyException

     * @throws NoSuchAlgorithmException

     * @throws InvalidKeySpecException

     * @throws Exception

     */

    private static Key keyGenerator(String keyStr) throws Exception {

        byte input[] = HexString2Bytes(keyStr);

        DESedeKeySpec KeySpec = new DESedeKeySpec(input);

        SecretKeyFactory KeyFactory = SecretKeyFactory.getInstance(KEY_ALGORITHM);

        return ((Key) (KeyFactory.generateSecret(((java.security.spec.KeySpec) (KeySpec)))));

    }

    private static int parse(char c) {

        if (c >= 'a') return (c - 'a' + ) & 0x0f;

        if (c >= 'A') return (c - 'A' + ) & 0x0f;

        return (c - '') & 0x0f;

    }

    // 从十六进制字符串到字节数组转换

    public static byte[] HexString2Bytes(String hexstr) {

        byte[] b = new byte[hexstr.length() / ];

        int j = ;

        for (int i = ; i < b.length; i++) {

            char c0 = hexstr.charAt(j++);

            char c1 = hexstr.charAt(j++);

            b[i] = (byte) ((parse(c0) << ) | parse(c1));

        }

        return b;

    }

    /**

     * CBC解密

     * @param key 密钥

     * @param keyiv IV

     * @param data Base64编码的密文

     * @return 明文

     * @throws Exception

     */

    public static byte[] des3DecodeCBC(byte[] key, byte[] keyiv, byte[] data) throws Exception {

        Key deskey = keyGenerator(new String(key));

        Cipher cipher = Cipher.getInstance(CIPHER_ALGORITHM);

        IvParameterSpec ips = new IvParameterSpec(keyiv);

        cipher.init(Cipher.DECRYPT_MODE, deskey, ips);

        byte[] bOut = cipher.doFinal(data);

        return bOut;

    }

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

        byte[] key = "6C4E60E55552386C759569836DC0F83869836DC0F838C0F7".getBytes();

        byte[] keyiv = { , , , , , , ,  };

        byte[] data = "amigoxie".getBytes("UTF-8");

        System.out.println("data.length=" + data.length);

        System.out.println("CBC加密解密");

        byte[] str5 = des3EncodeCBC(key, keyiv, data);

        System.out.println(new sun.misc.BASE64Encoder().encode(str5));

        byte[] str6 = des3DecodeCBC(key, keyiv, str5);

        System.out.println(new String(str6, "UTF-8"));

    }

    /////////////////////////////////////////////////3DES///////////////////////////////////////////////////////