1.加密工具类encryption
MD5加密
- import org.apache.commons.codec.digest.DigestUtils;
- /**
- * MD5加密组件
- *
- * @author wbw
- * @version 1.0
- * @since 1.0
- */
- public abstract class MD5Util {
- /**
- * MD5加密
- *
- * @param data
- * 待加密数据
- * @return byte[] 消息摘要
- *
- * @throws Exception
- */
- public static byte[] encodeMD5(String data) throws Exception {
- // 执行消息摘要
- return DigestUtils.md5(data);
- }
- /**
- * MD5加密
- *
- * @param data
- * 待加密数据
- * @return byte[] 消息摘要
- *
- * @throws Exception
- */
- public static String encodeMD5Hex(String data) {
- // 执行消息摘要
- return DigestUtils.md5Hex(data);
- }
- }
AES加密:
- import javax.crypto.Cipher;
- import javax.crypto.spec.SecretKeySpec;
- public class AESUtil {
- private static final String KEY_AES = "AES";
- public static String encrypt(String src, String key) throws Exception {
- if (key == null || key.length() != 16) {
- throw new Exception("key不满足条件");
- }
- byte[] raw = key.getBytes();
- SecretKeySpec skeySpec = new SecretKeySpec(raw, KEY_AES);
- Cipher cipher = Cipher.getInstance(KEY_AES);
- cipher.init(Cipher.ENCRYPT_MODE, skeySpec);
- byte[] encrypted = cipher.doFinal(src.getBytes());
- return byte2hex(encrypted);
- }
- public static String decrypt(String src, String key) throws Exception {
- if (key == null || key.length() != 16) {
- throw new Exception("key不满足条件");
- }
- byte[] raw = key.getBytes();
- SecretKeySpec skeySpec = new SecretKeySpec(raw, KEY_AES);
- Cipher cipher = Cipher.getInstance(KEY_AES);
- cipher.init(Cipher.DECRYPT_MODE, skeySpec);
- byte[] encrypted1 = hex2byte(src);
- byte[] original = cipher.doFinal(encrypted1);
- String originalString = new String(original);
- return originalString;
- }
- public static byte[] hex2byte(String strhex) {
- if (strhex == null) {
- return null;
- }
- int l = strhex.length();
- if (l % 2 == 1) {
- return null;
- }
- byte[] b = new byte[l / 2];
- for (int i = 0; i != l / 2; i++) {
- b[i] = (byte) Integer.parseInt(strhex.substring(i * 2, i * 2 + 2),
- 16);
- }
- return b;
- }
- public static String byte2hex(byte[] b) {
- String hs = "";
- String stmp = "";
- for (int n = 0; n < b.length; n++) {
- stmp = (java.lang.Integer.toHexString(b[n] & 0XFF));
- if (stmp.length() == 1) {
- hs = hs + "0" + stmp;
- } else {
- hs = hs + stmp;
- }
- }
- return hs.toUpperCase();
- }
- }
Base64加密:
- import org.apache.commons.codec.binary.Base64;
- /**
- * Base64组件
- *
- * @author wbw
- * @version 1.0
- * @since 1.0
- */
- public abstract class Base64Util {
- /**
- * 字符编码
- */
- public final static String ENCODING = "UTF-8";
- /**
- * Base64编码
- *
- * @param data 待编码数据
- * @return String 编码数据
- * @throws Exception
- */
- public static String encode(String data) throws Exception {
- // 执行编码
- byte[] b = Base64.encodeBase64(data.getBytes(ENCODING));
- return new String(b, ENCODING);
- }
- /**
- * Base64安全编码<br>
- * 遵循RFC 2045实现
- *
- * @param data
- * 待编码数据
- * @return String 编码数据
- *
- * @throws Exception
- */
- public static String encodeSafe(String data) throws Exception {
- // 执行编码
- byte[] b = Base64.encodeBase64(data.getBytes(ENCODING), true);
- return new String(b, ENCODING);
- }
- /**
- * Base64解码
- *
- * @param data 待解码数据
- * @return String 解码数据
- * @throws Exception
- */
- public static String decode(String data) throws Exception {
- // 执行解码
- byte[] b = Base64.decodeBase64(data.getBytes(ENCODING));
- return new String(b, ENCODING);
- }
- }
DES加密:
- import java.security.Key;
- import java.security.SecureRandom;
- import java.security.Security;
- import javax.crypto.Cipher;
- import javax.crypto.KeyGenerator;
- import javax.crypto.SecretKey;
- import javax.crypto.SecretKeyFactory;
- import javax.crypto.spec.DESKeySpec;
- import org.apache.commons.codec.binary.Base64;
- import org.bouncycastle.jce.provider.BouncyCastleProvider;
- /**
- * DES安全编码组件
- *
- * @author wbw
- * @version 1.0
- */
- public abstract class DESUtil {
- static{
- Security.insertProviderAt(new BouncyCastleProvider(), 1);
- }
- /**
- * 密钥算法 <br>
- * Java 6 只支持56bit密钥 <br>
- * Bouncy Castle 支持64bit密钥
- */
- public static final String KEY_ALGORITHM = "DES";
- /**
- * 加密/解密算法 / 工作模式 / 填充方式
- */
- public static final String CIPHER_ALGORITHM = "DES/ECB/PKCS5PADDING";
- /**
- * 转换密钥
- *
- * @param key
- * 二进制密钥
- * @return Key 密钥
- * @throws Exception
- */
- private static Key toKey(byte[] key) throws Exception {
- // 实例化DES密钥材料
- DESKeySpec dks = new DESKeySpec(key);
- // 实例化秘密密钥工厂
- SecretKeyFactory keyFactory = SecretKeyFactory
- .getInstance(KEY_ALGORITHM);
- // 生成秘密密钥
- SecretKey secretKey = keyFactory.generateSecret(dks);
- return secretKey;
- }
- /**
- * 解密
- *
- * @param data
- * 待解密数据
- * @param key
- * 密钥
- * @return byte[] 解密数据
- * @throws Exception
- */
- public static byte[] decrypt(byte[] data, byte[] key) throws Exception {
- // 还原密钥
- Key k = toKey(key);
- // 实例化
- Cipher cipher = Cipher.getInstance(CIPHER_ALGORITHM);
- // 初始化,设置为解密模式
- cipher.init(Cipher.DECRYPT_MODE, k);
- // 执行操作
- return cipher.doFinal(data);
- }
- /**
- * 加密
- *
- * @param data
- * 待加密数据
- * @param key
- * 密钥
- * @return byte[] 加密数据
- * @throws Exception
- */
- public static byte[] encrypt(byte[] data, byte[] key) throws Exception {
- // 还原密钥
- Key k = toKey(key);
- // 实例化
- Cipher cipher = Cipher.getInstance(CIPHER_ALGORITHM);
- // 初始化,设置为加密模式
- cipher.init(Cipher.ENCRYPT_MODE, k);
- // 执行操作
- return cipher.doFinal(data);
- }
- /**
- * 生成密钥 <br>
- * Java 6 只支持56bit密钥 <br>
- * Bouncy Castle 支持64bit密钥 <br>
- *
- * @return byte[] 二进制密钥
- * @throws Exception
- */
- public static byte[] initKey() throws Exception {
- /*
- * 实例化密钥生成器
- *
- * 若要使用64bit密钥注意替换 将下述代码中的KeyGenerator.getInstance(CIPHER_ALGORITHM);
- * 替换为KeyGenerator.getInstance(CIPHER_ALGORITHM, "BC");
- */
- KeyGenerator kg = KeyGenerator.getInstance(KEY_ALGORITHM);
- /*
- * 初始化密钥生成器 若要使用64bit密钥注意替换 将下述代码kg.init(56); 替换为kg.init(64);
- */
- kg.init(56, new SecureRandom());
- // 生成秘密密钥
- SecretKey secretKey = kg.generateKey();
- // 获得密钥的二进制编码形式
- return secretKey.getEncoded();
- }
- public static byte[] initKey(String seed) throws Exception {
- KeyGenerator kg = KeyGenerator.getInstance(KEY_ALGORITHM);
- SecureRandom secureRandom = new SecureRandom(new Base64().decode(seed));
- kg.init(secureRandom);
- SecretKey secretKey = kg.generateKey();
- return secretKey.getEncoded();
- }
- }
RSA加密:
- import java.io.ByteArrayOutputStream;
- import java.security.Key;
- import java.security.KeyFactory;
- import java.security.KeyPair;
- import java.security.KeyPairGenerator;
- import java.security.PrivateKey;
- import java.security.PublicKey;
- import java.security.SecureRandom;
- import java.security.Security;
- import java.security.interfaces.RSAPrivateKey;
- import java.security.interfaces.RSAPublicKey;
- import java.security.spec.PKCS8EncodedKeySpec;
- import java.security.spec.X509EncodedKeySpec;
- import java.util.HashMap;
- import java.util.Map;
- import java.util.UUID;
- import javax.crypto.Cipher;
- import org.bouncycastle.jce.provider.BouncyCastleProvider;
- import org.bouncycastle.util.encoders.Base64;
- /**
- * RSA安全编码组件
- *
- * @author wbw
- * @version 1.0
- */
- public class RSAUtil {
- /**
- * 非对称加密密钥算法
- */
- public static final String KEY_ALGORITHM_RSA = "RSA";
- /**
- * 公钥
- */
- private static final String RSA_PUBLIC_KEY = "RSAPublicKey";
- /**
- * 私钥
- */
- private static final String RSA_PRIVATE_KEY = "RSAPrivateKey";
- /**
- * RSA密钥长度
- * 默认1024位,
- * 密钥长度必须是64的倍数,
- * 范围在512至65536位之间。
- */
- private static final int KEY_SIZE = 1024;
- static{
- Security.insertProviderAt(new BouncyCastleProvider(), 1);
- }
- /**
- * 私钥解密
- *
- * @param data
- * 待解密数据
- * @param key
- * 私钥
- * @return byte[] 解密数据
- * @throws Exception
- */
- public static byte[] decryptByPrivateKey(byte[] data, byte[] key)
- throws Exception {
- // 取得私钥
- PKCS8EncodedKeySpec pkcs8KeySpec = new PKCS8EncodedKeySpec(key);
- KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM_RSA);
- // 生成私钥
- PrivateKey privateKey = keyFactory.generatePrivate(pkcs8KeySpec);
- // 对数据解密
- Cipher cipher = Cipher.getInstance(keyFactory.getAlgorithm());
- cipher.init(Cipher.DECRYPT_MODE, privateKey);
- int blockSize = cipher.getBlockSize();
- if(blockSize>0){
- ByteArrayOutputStream bout = new ByteArrayOutputStream(64);
- int j = 0;
- while (data.length - j * blockSize > 0) {
- bout.write(cipher.doFinal(data, j * blockSize, blockSize));
- j++;
- }
- return bout.toByteArray();
- }
- return cipher.doFinal(data);
- }
- /**
- * 公钥解密
- *
- * @param data
- * 待解密数据
- * @param key
- * 公钥
- * @return byte[] 解密数据
- * @throws Exception
- */
- public static byte[] decryptByPublicKey(byte[] data, byte[] key)
- throws Exception {
- // 取得公钥
- X509EncodedKeySpec x509KeySpec = new X509EncodedKeySpec(key);
- KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM_RSA);
- // 生成公钥
- PublicKey publicKey = keyFactory.generatePublic(x509KeySpec);
- // 对数据解密
- Cipher cipher = Cipher.getInstance(keyFactory.getAlgorithm());
- cipher.init(Cipher.DECRYPT_MODE, publicKey);
- return cipher.doFinal(data);
- }
- /**
- * 公钥加密
- *
- * @param data
- * 待加密数据
- * @param key
- * 公钥
- * @return byte[] 加密数据
- * @throws Exception
- */
- public static byte[] encryptByPublicKey(byte[] data, byte[] key)
- throws Exception {
- // 取得公钥
- X509EncodedKeySpec x509KeySpec = new X509EncodedKeySpec(key);
- KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM_RSA);
- PublicKey publicKey = keyFactory.generatePublic(x509KeySpec);
- // 对数据加密
- Cipher cipher = Cipher.getInstance(keyFactory.getAlgorithm());
- cipher.init(Cipher.ENCRYPT_MODE, publicKey);
- int blockSize = cipher.getBlockSize();
- if(blockSize>0){
- int outputSize = cipher.getOutputSize(data.length);
- int leavedSize = data.length % blockSize;
- int blocksSize = leavedSize != 0 ? data.length / blockSize + 1
- : data.length / blockSize;
- byte[] raw = new byte[outputSize * blocksSize];
- int i = 0,remainSize=0;
- while ((remainSize = data.length - i * blockSize) > 0) {
- int inputLen = remainSize > blockSize?blockSize:remainSize;
- cipher.doFinal(data, i * blockSize, inputLen, raw, i * outputSize);
- i++;
- }
- return raw;
- }
- return cipher.doFinal(data);
- }
- /**
- * 私钥加密
- *
- * @param data
- * 待加密数据
- * @param key
- * 私钥
- * @return byte[] 加密数据
- * @throws Exception
- */
- public static byte[] encryptByPrivateKey(byte[] data, byte[] key)
- throws Exception {
- // 取得私钥
- PKCS8EncodedKeySpec pkcs8KeySpec = new PKCS8EncodedKeySpec(key);
- KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM_RSA);
- // 生成私钥
- PrivateKey privateKey = keyFactory.generatePrivate(pkcs8KeySpec);
- // 对数据加密
- Cipher cipher = Cipher.getInstance(keyFactory.getAlgorithm());
- cipher.init(Cipher.ENCRYPT_MODE, privateKey);
- int blockSize = cipher.getBlockSize();
- if(blockSize>0){
- int outputSize = cipher.getOutputSize(data.length);
- int leavedSize = data.length % blockSize;
- int blocksSize = leavedSize != 0 ? data.length / blockSize + 1
- : data.length / blockSize;
- byte[] raw = new byte[outputSize * blocksSize];
- int i = 0,remainSize=0;
- while ((remainSize = data.length - i * blockSize) > 0) {
- int inputLen = remainSize > blockSize?blockSize:remainSize;
- cipher.doFinal(data, i * blockSize, inputLen, raw, i * outputSize);
- i++;
- }
- return raw;
- }
- return cipher.doFinal(data);
- }
- /**
- * 取得私钥
- *
- * @param keyMap
- * 密钥Map
- * @return key 私钥
- * @throws Exception
- */
- public static Key getPrivateKey(Map<String, Key> keyMap)
- throws Exception {
- return keyMap.get(RSA_PRIVATE_KEY);
- }
- /**
- * 取得私钥
- *
- * @param keyMap
- * 密钥Map
- * @return byte[] 私钥
- * @throws Exception
- */
- public static byte[] getPrivateKeyByte(Map<String, Key> keyMap)
- throws Exception {
- return keyMap.get(RSA_PRIVATE_KEY).getEncoded();
- }
- /**
- * 取得公钥
- *
- * @param keyMap
- * 密钥Map
- * @return key 公钥
- * @throws Exception
- */
- public static Key getPublicKey(Map<String, Key> keyMap)
- throws Exception {
- return keyMap.get(RSA_PUBLIC_KEY);
- }
- /**
- * 取得公钥
- *
- * @param keyMap
- * 密钥Map
- * @return byte[] 公钥
- * @throws Exception
- */
- public static byte[] getPublicKeyByte(Map<String, Key> keyMap)
- throws Exception {
- return keyMap.get(RSA_PUBLIC_KEY).getEncoded();
- }
- /**
- * 初始化密钥
- * @param byte[] seed 种子
- * @return Map 密钥Map
- * @throws Exception
- */
- public static Map<String,Key> initKey(byte[] seed)throws Exception{
- // 实例化密钥对生成器
- KeyPairGenerator keyPairGen = KeyPairGenerator
- .getInstance(KEY_ALGORITHM_RSA);
- // 初始化密钥对生成器
- keyPairGen.initialize(KEY_SIZE, new SecureRandom(seed) );
- // 生成密钥对
- KeyPair keyPair = keyPairGen.generateKeyPair();
- // 公钥
- RSAPublicKey publicKey = (RSAPublicKey) keyPair.getPublic();
- // 私钥
- RSAPrivateKey privateKey = (RSAPrivateKey) keyPair.getPrivate();
- // 封装密钥
- Map<String, Key> keyMap = new HashMap<String, Key>(2);
- keyMap.put(RSA_PUBLIC_KEY, publicKey);
- keyMap.put(RSA_PRIVATE_KEY, privateKey);
- return keyMap;
- }
- /**
- * 初始化密钥
- * @param seed 种子
- * @return Map 密钥Map
- * @throws Exception
- */
- public static Map<String,Key> initKey(String seed)throws Exception{
- return initKey(seed.getBytes());
- }
- /**
- * 初始化密钥
- *
- * @return Map 密钥Map
- * @throws Exception
- */
- public static Map<String, Key> initKey() throws Exception {
- return initKey(UUID.randomUUID().toString().getBytes());
- }
- public static PublicKey getPublicRSAKey(String key) throws Exception {
- X509EncodedKeySpec x509 = new X509EncodedKeySpec(Base64.decode(key));
- KeyFactory kf = KeyFactory.getInstance(KEY_ALGORITHM_RSA);
- return kf.generatePublic(x509);
- }
- public static PrivateKey getPrivateRSAKey(String key) throws Exception {
- PKCS8EncodedKeySpec pkgs8 = new PKCS8EncodedKeySpec(Base64.decode(key));
- KeyFactory kf = KeyFactory.getInstance(KEY_ALGORITHM_RSA);
- return kf.generatePrivate(pkgs8);
- }
- }
https://www.cnblogs.com/jpfss/p/8567001.html