package org.opencron.common.utils;
import org.apache.commons.codec.binary.Base64;
import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;
import javax.crypto.Cipher;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.DESKeySpec;
import javax.crypto.spec.SecretKeySpec;
import java.io.ByteArrayOutputStream;
import java.io.UnsupportedEncodingException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.security.SecureRandom;
import java.util.zip.DeflaterOutputStream;
import java.util.zip.InflaterOutputStream;
/**
* @author wanghuajie
* @since 3.0
*/
public abstract class DigestUtils {
private final static String DES = "DES";
private static final String MD5_ALGORITHM_NAME = "MD5";
private static final char[] HEX_CHARS =
{'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'};
public static byte[] md5Digest(String text) {
return digest(MD5_ALGORITHM_NAME, text.getBytes());
}
public static byte[] md5Digest(byte[] bytes) {
return digest(MD5_ALGORITHM_NAME, bytes);
}
public static String md5Hex(String text) {
return md5Hex(text.getBytes());
}
/**
* Return a hexadecimal string representation of the MD5 digest of the given
* bytes.
*
* @param bytes the bytes to calculate the digest over
* @return a hexadecimal digest string
*/
public static String md5Hex(byte[] bytes) {
return digestAsHexString(MD5_ALGORITHM_NAME, bytes);
}
/**
* Append a hexadecimal string representation of the MD5 digest of the given
* bytes to the given {@link StringBuilder}.
*
* @param bytes the bytes to calculate the digest over
* @param builder the string builder to append the digest to
* @return the given string builder
*/
public static StringBuilder appendMd5DigestAsHex(byte[] bytes, StringBuilder builder) {
return appendDigestAsHex(MD5_ALGORITHM_NAME, bytes, builder);
}
/**
* Creates a new {@link MessageDigest} with the given algorithm. Necessary
* because {@code MessageDigest} is not thread-safe.
*/
private static MessageDigest getDigest(String algorithm) {
try {
return MessageDigest.getInstance(algorithm);
} catch (NoSuchAlgorithmException ex) {
throw new IllegalStateException("Could not find MessageDigest with algorithm \"" + algorithm + "\"", ex);
}
}
private static byte[] digest(String algorithm, byte[] bytes) {
return getDigest(algorithm).digest(bytes);
}
private static String digestAsHexString(String algorithm, byte[] bytes) {
char[] hexDigest = digestAsHexChars(algorithm, bytes);
return new String(hexDigest);
}
private static StringBuilder appendDigestAsHex(String algorithm, byte[] bytes, StringBuilder builder) {
char[] hexDigest = digestAsHexChars(algorithm, bytes);
return builder.append(hexDigest);
}
private static char[] digestAsHexChars(String algorithm, byte[] bytes) {
byte[] digest = digest(algorithm, bytes);
return encodeHex(digest);
}
private static char[] encodeHex(byte[] bytes) {
char chars[] = new char[32];
for (int i = 0; i < chars.length; i = i + 2) {
byte b = bytes[i / 2];
chars[i] = HEX_CHARS[(b >>> 0x4) & 0xf];
chars[i + 1] = HEX_CHARS[b & 0xf];
}
return chars;
}
public static void main(String[] args) throws Exception {
System.out.println(compressData("中华人民共和国"));
System.out.println(decompressData("eJy7dmH3qhOnD3/cuWnX2Z2/GABciQr4"));
}
/**
* Description 根据键值进行加密
*
* @param data
* @param key 加密键byte数组
* @return
* @throws Exception
*/
public static String desEncrypt(String key, String data) throws Exception {
byte[] bt = desEncrypt(key.getBytes(), data.getBytes());
String strs = new BASE64Encoder().encode(bt);
return strs;
}
/**
* Description 根据键值进行解密
*
* @param data
* @param key 加密键byte数组
* @return
* @throws java.io.IOException
* @throws Exception
*/
public static String desDecrypt(String key, String data) throws Exception {
if (data == null)
return null;
BASE64Decoder decoder = new BASE64Decoder();
byte[] buf = decoder.decodeBuffer(data);
byte[] bt = desDecrypt(key.getBytes(), buf);
return new String(bt);
}
/**
* Description 根据键值进行加密
*
* @param data
* @param key 加密键byte数组
* @return
* @throws Exception
*/
private static byte[] desEncrypt(byte[] key, byte[] data) throws Exception {
// 生成一个可信任的随机数源
SecureRandom sr = new SecureRandom();
// 从原始密钥数据创建DESKeySpec对象
DESKeySpec dks = new DESKeySpec(key);
// 创建一个密钥工厂，然后用它把DESKeySpec转换成SecretKey对象
SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(DES);
SecretKey securekey = keyFactory.generateSecret(dks);
// Cipher对象实际完成加密操作
Cipher cipher = Cipher.getInstance(DES);
// 用密钥初始化Cipher对象
cipher.init(Cipher.ENCRYPT_MODE, securekey, sr);
return cipher.doFinal(data);
}
// 加密
public static String toBase64(String str) {
byte[] b = null;
String s = null;
try {
b = str.getBytes("utf-8");
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
if (b != null) {
s = new BASE64Encoder().encode(b);
}
return s;
}
// 解密
public static String passBase64(String s) {
byte[] b = null;
String result = null;
if (s != null) {
BASE64Decoder decoder = new BASE64Decoder();
try {
b = decoder.decodeBuffer(s);
result = new String(b, "utf-8");
} catch (Exception e) {
e.printStackTrace();
}
}
return result;
}
/**
* Description 根据键值进行解密
*
* @param data
* @param key 加密键byte数组
* @return
* @throws Exception
*/
private static byte[] desDecrypt(byte[] key, byte[] data) throws Exception {
// 生成一个可信任的随机数源
SecureRandom sr = new SecureRandom();
// 从原始密钥数据创建DESKeySpec对象
DESKeySpec dks = new DESKeySpec(key);
// 创建一个密钥工厂，然后用它把DESKeySpec转换成SecretKey对象
SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(DES);
SecretKey securekey = keyFactory.generateSecret(dks);
// Cipher对象实际完成解密操作
Cipher cipher = Cipher.getInstance(DES);
// 用密钥初始化Cipher对象
cipher.init(Cipher.DECRYPT_MODE, securekey, sr);
return cipher.doFinal(data);
}
public static String aesDecrypt(String key, String sSrc) throws Exception {
try {
if (key == null) {
throw new ExceptionInInitializerError("key can't be null");
}
if (key.length() != 16) {
throw new ExceptionInInitializerError("key length must be 16!");
}
byte[] raw = key.getBytes("ASCII");
SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");
Cipher cipher = Cipher.getInstance("AES");
cipher.init(2, skeySpec);
byte[] encrypted1 = hex2byte(sSrc);
try {
byte[] original = cipher.doFinal(encrypted1);
String originalString = new String(original);
return originalString;
} catch (Exception e) {
System.out.println(e.toString());
return null;
}
} catch (Exception ex) {
System.out.println(ex.toString());
}
return null;
}
/**
* @param sSrc
* @return 加密程序
* @throws Exception
*/
public static String aesEncrypt(String key, String sSrc) throws Exception {
if (key == null) {
throw new ExceptionInInitializerError("key not bo null");
}
if (key.length() != 16) {
throw new ExceptionInInitializerError("key length must be 16!");
}
byte[] raw = key.getBytes("ASCII");
SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");
Cipher cipher = Cipher.getInstance("AES");
cipher.init(1, skeySpec);
byte[] encrypted = cipher.doFinal(sSrc.getBytes());
return byte2hex(encrypted).toLowerCase();
}
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 = Integer.toHexString(b[n] & 0xFF);
if (stmp.length() == 1)
hs = hs + "0" + stmp;
else {
hs = hs + stmp;
}
}
return hs.toUpperCase();
}
// 压缩字符串
public static String compressData(String data) {
try {
ByteArrayOutputStream bos = new ByteArrayOutputStream();
DeflaterOutputStream zos = new DeflaterOutputStream(bos);
zos.write(data.getBytes());
zos.close();
return new String(getenBASE64inCodec(bos.toByteArray()));
} catch (Exception ex) {
ex.printStackTrace();
return "ZIP_ERR";
}
}
// 压缩字符串
public static String compressData(String data, String charset) {
try {
ByteArrayOutputStream bos = new ByteArrayOutputStream();
DeflaterOutputStream zos = new DeflaterOutputStream(bos);
zos.write(data.getBytes());
zos.close();
return new String(getenBASE64inCodec(bos.toByteArray(), charset));
} catch (Exception ex) {
ex.printStackTrace();
return "ZIP_ERR";
}
}
// 使用apche codec对数组进行encode
public static String getenBASE64inCodec(byte[] b) {
if (b == null)
return null;
return new String((new Base64()).encode(b));
}
// 使用apche codec对数组进行encode
public static String getenBASE64inCodec(byte[] b, String charset) {
if (b == null)
return null;
try {
return new String((new Base64()).encode(b), charset);
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
return null;
}
// base64转码为string
public static byte[] getdeBASE64inCodec(String s) {
if (s == null)
return null;
return new Base64().decode(s.getBytes());
}
// 解码字符串
public static String decompressData(String encdata) {
try {
ByteArrayOutputStream bos = new ByteArrayOutputStream();
InflaterOutputStream zos = new InflaterOutputStream(bos);
zos.write(getdeBASE64inCodec(encdata));
zos.close();
return new String(bos.toByteArray());
} catch (Exception ex) {
ex.printStackTrace();
return "UNZIP_ERR";
}
}
// 解码字符串
public static String decompressData(String encdata, String charset) {
try {
ByteArrayOutputStream bos = new ByteArrayOutputStream();
InflaterOutputStream zos = new InflaterOutputStream(bos);
zos.write(getdeBASE64inCodec(encdata));
zos.close();
return new String(bos.toByteArray(), charset);
} catch (Exception ex) {
ex.printStackTrace();
return "UNZIP_ERR";
}
}
public static String getEncoding(String text) {
String encode = "ISO-8859-1";
try {
if (text.equals(new String(text.getBytes(encode), encode))) {
return encode;
}
} catch (Exception exception1) {
}
encode = "GB2312";
try {
if (text.equals(new String(text.getBytes(encode), encode))) {
return encode;
}
} catch (Exception exception) {}
encode = "UTF-8";
try {
if (text.equals(new String(text.getBytes(encode), encode))) {
return encode;
}
} catch (Exception exception2) {
}
encode = "GBK";
try {
if (text.equals(new String(text.getBytes(encode), encode))) {
return encode;
}
} catch (Exception exception3) {
}
return encode;
}
}