Java Base64、HMAC、SHA1、MD5、AES DES 3DES加密算法



●  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 = 0; i < messageDigest.length; i++) { String shaHex = Integer.toHexString(messageDigest[i] & 0xFF); if (shaHex.length() < 2) { hexString.append(0); } 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 = 0; i < messageDigest.length; i++) { String shaHex = Integer.toHexString(messageDigest[i] & 0xFF); if (shaHex.length() < 2) { hexString.append(0); } 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 = 0; i < md.length; i++) { String shaHex = Integer.toHexString(md[i] & 0xFF); if (shaHex.length() < 2) { hexString.append(0); } 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(128, 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(128, 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' + 10) & 0x0f;

        if (c >= 'A') return (c - 'A' + 10) & 0x0f;

        return (c - '0') & 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() / 2];

        int j = 0;

        for (int i = 0; i < b.length; i++) {

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

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

            b[i] = (byte) ((parse(c0) << 4) | 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 = 0; 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 = 0; 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' + 10) & 0x0f;

        if (c >= 'A') return (c - 'A' + 10) & 0x0f;

        return (c - '0') & 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() / 2];

        int j = 0;

        for (int i = 0; i < b.length; i++) {

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

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

            b[i] = (byte) ((parse(c0) << 4) | 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 = { 1, 2, 3, 4, 5, 6, 7, 8 };

        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///////////////////////////////////////////////////////

 

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