加密解密工具类
代码语言:javascript复制import com.sun.org.apache.xerces.internal.impl.dv.util.Base64;
import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;
import javax.crypto.Mac;
import javax.crypto.SecretKey;
import javax.crypto.spec.SecretKeySpec;
import java.security.MessageDigest;
import java.security.SecureRandom;
public class EncryptUtil {
public static final String MD5 = "MD5";
public static final String SHA1 = "SHA1";
public static final String HmacMD5 = "HmacMD5";
public static final String HmacSHA1 = "HmacSHA1";
public static final String DES = "DES";
public static final String AES = "AES";
/**编码格式;默认使用uft-8*/
public String charset = "utf-8";
/**DES*/
public int keysizeDES = 0;
/**AES*/
public int keysizeAES = 128;
public static EncryptUtil me;
private EncryptUtil(){
//单例
}
//双重锁
public static EncryptUtil getInstance(){
if (me==null) {
synchronized (EncryptUtil.class) {
if(me == null){
me = new EncryptUtil();
}
}
}
return me;
}
/**
* 使用MessageDigest进行单向加密(无密码)
* @param res 被加密的文本
* @param algorithm 加密算法名称
* @return
*/
private String messageDigest(String res,String algorithm){
try {
MessageDigest md = MessageDigest.getInstance(algorithm);
byte[] resBytes = charset==null?res.getBytes():res.getBytes(charset);
return base64(md.digest(resBytes));
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
/**
* 使用KeyGenerator进行单向/双向加密(可设密码)
* @param res 被加密的原文
* @param algorithm 加密使用的算法名称
* @param key 加密使用的秘钥
* @return
*/
private String keyGeneratorMac(String res,String algorithm,String key){
try {
SecretKey sk = null;
if (key==null) {
KeyGenerator kg = KeyGenerator.getInstance(algorithm);
sk = kg.generateKey();
}else {
byte[] keyBytes = charset==null?key.getBytes():key.getBytes(charset);
sk = new SecretKeySpec(keyBytes, algorithm);
}
Mac mac = Mac.getInstance(algorithm);
mac.init(sk);
byte[] result = mac.doFinal(res.getBytes());
return base64(result);
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
/**
* 使用KeyGenerator双向加密,DES/AES,注意这里转化为字符串的时候是将2进制转为16进制格式的字符串,不是直接转,因为会出错
* @param res 加密的原文
* @param algorithm 加密使用的算法名称
* @param key 加密的秘钥
* @param keysize
* @param isEncode
* @return
*/
private String keyGeneratorES(String res,String algorithm,String key,int keysize,boolean isEncode){
try {
KeyGenerator kg = KeyGenerator.getInstance(algorithm);
if (keysize == 0) {
byte[] keyBytes = charset==null?key.getBytes():key.getBytes(charset);
kg.init(new SecureRandom(keyBytes));
}else if (key==null) {
kg.init(keysize);
}else {
byte[] keyBytes = charset==null?key.getBytes():key.getBytes(charset);
kg.init(keysize, new SecureRandom(keyBytes));
}
SecretKey sk = kg.generateKey();
SecretKeySpec sks = new SecretKeySpec(sk.getEncoded(), algorithm);
Cipher cipher = Cipher.getInstance(algorithm);
if (isEncode) {
cipher.init(Cipher.ENCRYPT_MODE, sks);
byte[] resBytes = charset==null?res.getBytes():res.getBytes(charset);
return parseByte2HexStr(cipher.doFinal(resBytes));
}else {
cipher.init(Cipher.DECRYPT_MODE, sks);
return new String(cipher.doFinal(parseHexStr2Byte(res)));
}
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
private String base64(byte[] res){
return Base64.encode(res);
}
/**将二进制转换成16进制 */
public static String parseByte2HexStr(byte buf[]) {
StringBuffer sb = new StringBuffer();
for (int i = 0; i < buf.length; i ) {
String hex = Integer.toHexString(buf[i] & 0xFF);
if (hex.length() == 1) {
hex = '0' hex;
}
sb.append(hex.toUpperCase());
}
return sb.toString();
}
/**将16进制转换为二进制*/
public static byte[] parseHexStr2Byte(String hexStr) {
if (hexStr.length() < 1)
return null;
byte[] result = new byte[hexStr.length()/2];
for (int i = 0;i< hexStr.length()/2; i ) {
int high = Integer.parseInt(hexStr.substring(i*2, i*2 1), 16);
int low = Integer.parseInt(hexStr.substring(i*2 1, i*2 2), 16);
result[i] = (byte) (high * 16 low);
}
return result;
}
/**
* md5加密算法进行加密(不可逆)
* @param res 需要加密的原文
* @return
*/
public String MD5(String res) {
return messageDigest(res, MD5);
}
/**
* md5加密算法进行加密(不可逆)
* @param res 需要加密的原文
* @param key 秘钥
* @return
*/
public String MD5(String res, String key) {
return keyGeneratorMac(res, HmacMD5, key);
}
/**
* 使用SHA1加密算法进行加密(不可逆)
* @param res 需要加密的原文
* @return
*/
public String SHA1(String res) {
return messageDigest(res, SHA1);
}
/**
* 使用SHA1加密算法进行加密(不可逆)
* @param res 需要加密的原文
* @param key 秘钥
* @return
*/
public String SHA1(String res, String key) {
return keyGeneratorMac(res, HmacSHA1, key);
}
/**
* 使用DES加密算法进行加密(可逆)
* @param res 需要加密的原文
* @param key 秘钥
* @return
*/
public String DESencode(String res, String key) {
return keyGeneratorES(res, DES, key, keysizeDES, true);
}
/**
* 对使用DES加密算法的密文进行解密(可逆)
* @param res 需要解密的密文
* @param key 秘钥
* @return
*/
public String DESdecode(String res, String key) {
return keyGeneratorES(res, DES, key, keysizeDES, false);
}
/**
* 使用AES加密算法经行加密(可逆)
* @param res 需要加密的密文
* @param key 秘钥
* @return
*/
public String AESencode(String res, String key) {
return keyGeneratorES(res, AES, key, keysizeAES, true);
}
/**
* 对使用AES加密算法的密文进行解密
* @param res 需要解密的密文
* @param key 秘钥
* @return
*/
public String AESdecode(String res, String key) {
return keyGeneratorES(res, AES, key, keysizeAES, false);
}
/**
* 使用异或进行加密
* @param res 需要加密的密文
* @param key 秘钥
* @return
*/
public String XORencode(String res, String key) {
byte[] bs = res.getBytes();
for (int i = 0; i < bs.length; i ) {
bs[i] = (byte) ((bs[i]) ^ key.hashCode());
}
return parseByte2HexStr(bs);
}
/**
* 使用异或进行解密
* @param res 需要解密的密文
* @param key 秘钥
* @return
*/
public String XORdecode(String res, String key) {
byte[] bs = parseHexStr2Byte(res);
for (int i = 0; i < bs.length; i ) {
bs[i] = (byte) ((bs[i]) ^ key.hashCode());
}
return new String(bs);
}
/**
* 直接使用异或(第一调用加密,第二次调用解密)
* @param res 密文
* @param key 秘钥
* @return
*/
public int XOR(int res, String key) {
return res ^ key.hashCode();
}
/**
* 使用Base64进行加密
* @param res 密文
* @return
*/
public String Base64Encode(String res) {
return Base64.encode(res.getBytes());
}
/**
* 使用Base64进行解密
* @param res
* @return
*/
public String Base64Decode(String res) {
return new String(Base64.decode(res));
}
}
AES 支持Linux
代码语言:javascript复制package xl.cloud.gis.system.Utils;
import com.sun.org.apache.xerces.internal.impl.dv.util.Base64;
import javax.crypto.*;
import javax.crypto.spec.SecretKeySpec;
import java.io.UnsupportedEncodingException;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.security.SecureRandom;
public class AES {
private static int length=128;
/**
* 加密
*
* @param content
* 需要加密的内容
* @param password
* 加密密码
* @return
* @throws NoSuchAlgorithmException
* @throws NoSuchPaddingException
* @throws UnsupportedEncodingException
* @throws InvalidKeyException
* @throws BadPaddingException
* @throws IllegalBlockSizeException
*/
private static byte[] encrypt(String content, String password)
throws Exception {
KeyGenerator kgen = KeyGenerator.getInstance("AES");
SecureRandom secureRandom = SecureRandom.getInstance("SHA1PRNG" );
secureRandom.setSeed(password.getBytes());
kgen.init(length, secureRandom);
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
}
/**
* 解密
*
* @param content
* 待解密内容
* @param password
* 解密密钥
* @return
*/
private static byte[] decrypt(byte[] content, String password)
throws Exception {
KeyGenerator kgen = KeyGenerator.getInstance("AES");
SecureRandom secureRandom = SecureRandom.getInstance("SHA1PRNG" );
secureRandom.setSeed(password.getBytes());
kgen.init(length, secureRandom);
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
}
// /**
// * 将二进制转换成16进制
// *
// * @param buf
// * @return
// */
// public static String parseByte2HexStr(byte buf[]) {
// StringBuffer sb = new StringBuffer();
// for (int i = 0; i < buf.length; i ) {
// String hex = Integer.toHexString(buf[i] & 0xFF);
// if (hex.length() == 1) {
// hex = '0' hex;
// }
// sb.append(hex.toUpperCase());
// }
// return sb.toString();
// }
//
// /**
// * 将16进制转换为二进制
// *
// * @param hexStr
// * @return
// */
// public static byte[] parseHexStr2Byte(String hexStr) {
// if (hexStr.length() < 1)
// return null;
// byte[] result = new byte[hexStr.length() / 2];
// for (int i = 0; i < hexStr.length() / 2; i ) {
// int high = Integer.parseInt(hexStr.substring(i * 2, i * 2 1), 16);
// int low = Integer.parseInt(hexStr.substring(i * 2 1, i * 2 2),
// 16);
// result[i] = (byte) (high * 16 low);
// }
// return result;
// }
/**
* 加密
*
* @param content
* 需要加密的内容
* @param password
* 加密密码
* @return
*/
public static byte[] encrypt2(String content, String password) {
try {
SecretKeySpec key = new SecretKeySpec(password.getBytes(), "AES");
Cipher cipher = Cipher.getInstance("AES/ECB/NoPadding");
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;
}
public static String encrypt2Str(String content, String password) throws Exception {
byte[] encryptResult = encrypt(content, password);
return Base64.encode(encryptResult);
}
public static String decrypt2Str(String content, String password) throws Exception {
byte[] decryptResult = decrypt(Base64.decode(content), password);
return new String(decryptResult,"UTF-8");
}
public static void main(String[] args) throws Exception {
String content = "t太阳est地";
String password = "12345678";
// 加密
System.out.println("加密前:" content);
String tt4 = encrypt2Str(content, password);
System.out.println(new String(tt4));
// 解密
String d = decrypt2Str(tt4, password);
System.out.println("解密后:" d);
// 加密前:t太阳est地
// Bpf0jyJDj/pVHaRf66 OMA==
// 解密后:t太阳est地
}
}