package ***;import com.ncf.rcms.util.impl.UtilServiceImpl;import lombok.extern.slf4j.Slf4j;import sun.misc.BASE64Decoder;import sun.misc.BASE64Encoder;import javax.crypto.Cipher;import javax.crypto.KeyGenerator;import javax.crypto.SecretKey;import javax.crypto.spec.SecretKeySpec;import java.security.MessageDigest;import java.security.NoSuchAlgorithmException;import java.security.SecureRandom;@Slf4jpublic class PasswordUtil { private static final char[] HEX_DIGITS = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f' }; public static String MD5(String passwordInPlainText) { try { MessageDigest mdTemp = MessageDigest.getInstance("MD5"); mdTemp.update(passwordInPlainText.getBytes("utf-8")); byte[] md = mdTemp.digest(); char[] str = new char[md.length << 1]; int k = 0; for (byte byte0 : md) { str[k++] = HEX_DIGITS[byte0 >>> 4 & 0xf]; str[k++] = HEX_DIGITS[byte0 & 0xf]; } return new String(str); } catch (Exception e) { return null; } } public static String MD5forRequest(String content) { MessageDigest md5; try { md5 = MessageDigest .getInstance("MD5"); } catch (NoSuchAlgorithmException e) { // TODO Auto-generated catch block return null; } md5.update(content.getBytes()); byte[] domain = md5.digest(); StringBuffer md5StrBuff = new StringBuffer(); // converting domain to String for (int i = 0; i < domain.length; ++i) { if (Integer.toHexString(0xFF & domain[i]).length() == 1) { md5StrBuff.append("0").append( Integer.toHexString(0xFF & domain[i])); } else md5StrBuff.append(Integer.toHexString(0xFF & domain[i])); } return md5StrBuff.toString(); } public static String generateRandomSalt() { return ApplicationContextHolder.getBean(UtilServiceImpl.class).generateKey(9999, 24); } /* * 加密 * 1.构造密钥生成器 * 2.根据ecnodeRules规则初始化密钥生成器 * 3.产生密钥 * 4.创建和初始化密码器 * 5.内容加密 * 6.返回字符串 */ public static String AESEncode(String encodeRules, String content) { try { //1.构造密钥生成器，指定为AES算法,不区分大小写 KeyGenerator keygen = KeyGenerator.getInstance("AES"); //2.根据ecnodeRules规则初始化密钥生成器 //生成一个128位的随机源,根据传入的字节数组 SecureRandom secureRandom = SecureRandom.getInstance("SHA1PRNG"); secureRandom.setSeed(encodeRules.getBytes()); keygen.init(128, secureRandom); //3.产生原始对称密钥 SecretKey original_key = keygen.generateKey(); //4.获得原始对称密钥的字节数组 byte[] raw = original_key.getEncoded(); //5.根据字节数组生成AES密钥 SecretKey key = new SecretKeySpec(raw, "AES"); //6.根据指定算法AES自成密码器 Cipher cipher = Cipher.getInstance("AES"); //7.初始化密码器，第一个参数为加密(Encrypt_mode)或者解密解密(Decrypt_mode)操作，第二个参数为使用的KEY cipher.init(Cipher.ENCRYPT_MODE, key); //8.获取加密内容的字节数组(这里要设置为utf-8)不然内容中如果有中文和英文混合中文就会解密为乱码 byte[] byte_encode = content.getBytes("utf-8"); //9.根据密码器的初始化方式--加密：将数据加密 byte[] byte_AES = cipher.doFinal(byte_encode); //10.将加密后的数据转换为字符串 //这里用Base64Encoder中会找不到包 //解决办法： //在项目的Build path中先移除JRE System Library，再添加库JRE System Library，重新编译后就一切正常了。 String AES_encode = new String(new BASE64Encoder().encode(byte_AES)); //11.将字符串返回 return AES_encode; } catch (Exception e) { e.printStackTrace(); } //如果有错就返加null return null; } /* * 解密 * 解密过程： * 1.同加密1-4步 * 2.将加密后的字符串反纺成byte[]数组 * 3.将加密内容解密 */ public static String AESDecode(String encodeRules, String content) { try { log.info("encodeRules:{},content:{}", encodeRules, content); //1.构造密钥生成器，指定为AES算法,不区分大小写 KeyGenerator keygen = KeyGenerator.getInstance("AES"); //2.根据ecnodeRules规则初始化密钥生成器 //生成一个128位的随机源,根据传入的字节数组 SecureRandom secureRandom = SecureRandom.getInstance("SHA1PRNG"); secureRandom.setSeed(encodeRules.getBytes()); keygen.init(128, secureRandom); //3.产生原始对称密钥 SecretKey original_key = keygen.generateKey(); //4.获得原始对称密钥的字节数组 byte[] raw = original_key.getEncoded(); //5.根据字节数组生成AES密钥 SecretKey key = new SecretKeySpec(raw, "AES"); //6.根据指定算法AES自成密码器 Cipher cipher = Cipher.getInstance("AES"); //7.初始化密码器，第一个参数为加密(Encrypt_mode)或者解密(Decrypt_mode)操作，第二个参数为使用的KEY cipher.init(Cipher.DECRYPT_MODE, key); //8.将加密并编码后的内容解码成字节数组 byte[] byte_content = new BASE64Decoder().decodeBuffer(content); /* * 解密 */ byte[] byte_decode = cipher.doFinal(byte_content); String AES_decode = new String(byte_decode, "utf-8"); return AES_decode; } catch (Exception e) { log.info("Exception:{}", e.getMessage()); e.printStackTrace(); } //如果有错就返加null return null; }}SecureRandom secureRandom = SecureRandom.getInstance("SHA1PRNG");
secureRandom.setSeed(encodeRules.getBytes());
keygen.init(128, secureRandom);
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