package com.sf.core.sgs.utils; import java.security.Key; import java.security.NoSuchAlgorithmException; import javax.crypto.Cipher; import javax.crypto.KeyGenerator; import javax.crypto.spec.SecretKeySpec; import org.apache.commons.codec.binary.Hex; public class AESCoder { public static final String ALGORITHM = "AES"; public static final String CIPHER_ALGORITHM = "AES/ECB/PKCS5Padding"; public static byte[] initKey(){ try { KeyGenerator keyGenerator = KeyGenerator.getInstance(ALGORITHM); keyGenerator.init(128); return keyGenerator.generateKey().getEncoded(); } catch (NoSuchAlgorithmException e) { throw new RuntimeException(e.getMessage(), e); } } private static Key toKey(byte[] key){ return new SecretKeySpec(key, ALGORITHM); } public static String encrypt(String data, String k) throws Exception { Key key = toKey(Hex.decodeHex(k.toCharArray())); Cipher cipher = Cipher.getInstance(CIPHER_ALGORITHM); //初始化, 设置为加密模式 cipher.init(Cipher.ENCRYPT_MODE, key); byte[] enBytes = cipher.doFinal(data.getBytes()); return String.valueOf(Hex.encodeHex(enBytes)); } public static String decrypt(String data, String k) throws Exception{ Key key = toKey(Hex.decodeHex(k.toCharArray())); Cipher cipher = Cipher.getInstance(CIPHER_ALGORITHM); //初始化, 设置为解密模式 cipher.init(Cipher.DECRYPT_MODE, key); byte[] bytes = cipher.doFinal(Hex.decodeHex(data.toCharArray())); return new String(bytes); } public static void main(String[] args) throws Exception{ String inputStr = "123456"; byte[] k = AESCoder.initKey(); String keyStr = String.valueOf(Hex.encodeHex(k)); System.out.println("密钥: " + keyStr); String en = AESCoder.encrypt(inputStr, keyStr); System.out.println("密文: " + en); //解密 String de = AESCoder.decrypt(en, keyStr); System.out.println("解密后明文: " + new String(de)); } }
HmacMD5
public class MACEncoder { public static final String ALGORITHM = "HmacMD5"; public static byte[] initHmacMD5Key() throws Exception{ KeyGenerator keyGenerator = KeyGenerator.getInstance(ALGORITHM); SecretKey secretKey = keyGenerator.generateKey(); return secretKey.getEncoded(); } public static byte[] encodeHmacMD5(byte[] data, byte[] key) throws Exception{ SecretKey secretKey = new SecretKeySpec(key, ALGORITHM); Mac mac = Mac.getInstance(secretKey.getAlgorithm()); mac.init(secretKey); return mac.doFinal(data); } public static void main(String[] args) throws Exception{ String id = "13141283947192347174"; String key = "11"; long t1 = System.currentTimeMillis(); System.out.println(encodeHmacMD5(id, key)); System.out.println(encodeHmacMD5(id, key)); System.out.println(encodeHmacMD5(id, key)); System.out.println(encodeHmacMD5(id, key)); System.out.println(System.currentTimeMillis() - t1); //System.out.println(Hex.encodeHex(initHmacMD5Key())); } public static String encodeHmacMD5(String data, String key) throws Exception{ SecretKey secretKey = new SecretKeySpec(Hex.decodeHex(key.toCharArray()), "HmacMD5"); Mac mac = Mac.getInstance(secretKey.getAlgorithm()); mac.init(secretKey); return String.valueOf(Hex.encodeHex(mac.doFinal(data.getBytes()))); } }
MD5
public class MD5Encoder2 { public static void main(String[] args) { String str = "12345"; try { MessageDigest digest = MessageDigest.getInstance("MD5"); byte[] bytes = digest.digest(str.getBytes()); System.out.println(Hex.encodeHex(bytes)); } catch (Exception e) { e.printStackTrace(); } } }
RSA
public class RSAEncoder { public static final String ALGORITHM = "rsa"; public static final String PUBLIC_KEY = "RSAPublicKey"; public static final String PRIVATE_KEY = "RSAPrivateKey"; public static final int KEY_SIZE = 512; /** * 私钥解密 * @param data * @param key * @return * @throws Exception */ public static byte[] decryptByPrivateKey(byte[] data, byte[] key) throws Exception{ PKCS8EncodedKeySpec pkcs8EncodedKeySpec = new PKCS8EncodedKeySpec(key); KeyFactory keyFactory = KeyFactory.getInstance(ALGORITHM); PrivateKey privateKey = keyFactory.generatePrivate(pkcs8EncodedKeySpec); Cipher cipher = Cipher.getInstance(keyFactory.getAlgorithm()); cipher.init(Cipher.DECRYPT_MODE, privateKey); return cipher.doFinal(data); } /** * 公钥加密 * @param data * @param key * @return * @throws Exception */ public static byte[] encryptByPublicKey(byte[] data, byte[] key) throws Exception{ X509EncodedKeySpec x509EncodedKeySpec = new X509EncodedKeySpec(key); KeyFactory keyFactory = KeyFactory.getInstance(ALGORITHM); PublicKey publicKey = keyFactory.generatePublic(x509EncodedKeySpec); Cipher cipher = Cipher.getInstance(keyFactory.getAlgorithm()); cipher.init(Cipher.ENCRYPT_MODE, publicKey); return cipher.doFinal(data); } /** * 公钥加密 * @param data * @param key * @return * @throws Exception */ public static byte[] encryptByPublicKey(byte[] data, PublicKey publicKey) throws Exception { KeyFactory keyFactory = KeyFactory.getInstance(ALGORITHM); Cipher cipher = Cipher.getInstance(keyFactory.getAlgorithm()); cipher.init(Cipher.ENCRYPT_MODE, publicKey); return cipher.doFinal(data); } /** * 公钥解密 * @param data * @param key * @return * @throws Exception */ public static byte[] decryptByPublicKey(byte[] data, byte[] key) throws Exception{ X509EncodedKeySpec x509EncodedKeySpec = new X509EncodedKeySpec(key); KeyFactory keyFactory = KeyFactory.getInstance(ALGORITHM); PublicKey publicKey = keyFactory.generatePublic(x509EncodedKeySpec); Cipher cipher = Cipher.getInstance(keyFactory.getAlgorithm()); cipher.init(Cipher.DECRYPT_MODE, publicKey); return cipher.doFinal(data); } /** * 私钥加密 * @param data * @param key * @return * @throws Exception */ public static byte[] encryptByPrivateKey(byte[] data, byte[] key) throws Exception{ PKCS8EncodedKeySpec pkcs8EncodedKeySpec = new PKCS8EncodedKeySpec(key); KeyFactory keyFactory = KeyFactory.getInstance(ALGORITHM); PrivateKey privateKey = keyFactory.generatePrivate(pkcs8EncodedKeySpec); Cipher cipher = Cipher.getInstance(keyFactory.getAlgorithm()); cipher.init(Cipher.ENCRYPT_MODE, privateKey); return cipher.doFinal(data); } /** * 初始化密钥 * @return * @throws Exception */ public static KeyPair initKey() throws Exception{ KeyPairGenerator keyPairGenerator = KeyPairGenerator.getInstance(ALGORITHM); KeyPair keyPair = keyPairGenerator.generateKeyPair(); return keyPair; } public static void main(String[] args) throws Exception{ KeyPair keyPair = initKey();//密钥对 String data = "明文数据12345"; System.out.println("私钥: " + String.valueOf(Hex.encodeHex(keyPair.getPrivate().getEncoded()))); System.out.println("公钥: " + String.valueOf(Hex.encodeHex(keyPair.getPublic().getEncoded()))); byte[] byte1 = encryptByPublicKey(data.getBytes(), keyPair.getPublic().getEncoded()); System.out.println("公钥加密后: " + String.valueOf(Hex.encodeHex(byte1))); byte[] byte2 = decryptByPrivateKey(byte1, keyPair.getPrivate().getEncoded()); System.out.println("私钥解密后: " + new String(byte2)); byte[] byte3 = encryptByPrivateKey(data.getBytes(), keyPair.getPrivate().getEncoded()); System.out.println("私钥加密后: " + String.valueOf(Hex.encodeHex(byte3))); byte[] byte4 = decryptByPublicKey(byte3, keyPair.getPublic().getEncoded()); System.out.println("公钥解密后: " + new String(byte4)); } }