net.wicp.tams.commons.apiext.PwdUtil Maven / Gradle / Ivy
package net.wicp.tams.commons.apiext;
import java.io.IOException;
import java.io.InputStream;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import javax.crypto.Cipher;
import javax.crypto.SecretKey;
import javax.crypto.spec.SecretKeySpec;
import org.apache.commons.codec.binary.Base64;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import net.wicp.tams.commons.Conf;
import net.wicp.tams.commons.constant.DES;
import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;
@SuppressWarnings("restriction")
public abstract class PwdUtil {
private final static Logger logger = LoggerFactory.getLogger(PwdUtil.class);
/***
* Base64压缩
*
* @param key
* @return 压缩后文字
*/
public final static String StringToBase64(String key) {
return new String(Base64.encodeBase64(StringUtil.hexStringToBytes(key)));
}
/***
* Base64解压
*
* @param key
* @return 解压后原文
*/
public final static String Base64ToString(String key) {
return StringUtil.bytesToHexString(Base64.decodeBase64(key.getBytes()));
}
/***
* 产生MD5编码
*
* @param s
* 要编码的字符串
* @return MD5编码
*/
public final static String MD5(String s) {
char hexDigits[] = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' };
try {
byte[] strTemp = s.getBytes();
MessageDigest mdTemp = MessageDigest.getInstance("MD5");
mdTemp.update(strTemp);
byte[] md = mdTemp.digest();
int j = md.length;
char str[] = new char[j * 2];
int k = 0;
for (int i = 0; i < j; i++) {
byte byte0 = md[i];
str[k++] = hexDigits[byte0 >>> 4 & 0xf];
str[k++] = hexDigits[byte0 & 0xf];
}
return new String(str);
} catch (Exception e) {
logger.error("MD5加密失败");
return null;
}
}
/***
* 计算24位长的密码byte值,首先对原始密钥做MD5算hash值，再用前8位数据对应补全后8位
*
* @param strKey
* @return 加密字节码
* @throws Exception
*/
private static byte[] GetKeyBytes(String strKey) throws Exception {
if (null == strKey || strKey.length() < 1)
throw new Exception("key is null or empty!");
java.security.MessageDigest alg = java.security.MessageDigest.getInstance("MD5");
alg.update(strKey.getBytes(Conf.get("common.encode")));
byte[] bkey = alg.digest();
int start = bkey.length;
byte[] bkey24 = new byte[24];
for (int i = 0; i < start; i++) {
bkey24[i] = bkey[i];
}
for (int i = start; i < 24; i++) {// 为了与.net16位key兼容
bkey24[i] = bkey[i - start];
}
return bkey24;
}
/****
* 加密数据
*
* @param keybyte
* 24个字节的加密密钥
* @param src
* 被加密的数据缓冲区（源）
* @param des
* 加密算法
* @return 加密后的字节码
*/
private static byte[] encryptMode(byte[] keybyte, byte[] src, DES des) {
try {
// 生成密钥
SecretKey deskey = new SecretKeySpec(keybyte, des.name()); // 加密
Cipher c1 = Cipher.getInstance(des.name());
c1.init(Cipher.ENCRYPT_MODE, deskey);
return c1.doFinal(src);
} catch (Exception e1) {
logger.error("加密数据失败", e1);
}
return null;
}
private static byte[] decryptMode(byte[] keybyte, byte[] src, DES des) {
try {
SecretKey deskey = new SecretKeySpec(keybyte, des.name());// 生成密钥
Cipher c1 = Cipher.getInstance(des.name());// 解密
c1.init(Cipher.DECRYPT_MODE, deskey);
return c1.doFinal(src);
} catch (Exception e) {
logger.error("解密数据失败", e);
}
return null;
}
/***
* 通过key 用3DES加密
*
* @param origValue
* 要加密的数数据
* @param key
* 加密用的key
* @return 加密后的密文
*/
public static String Encrypt3DES(String origValue, String key) {
String str = null;
try {
str = Base64.encodeBase64String(
encryptMode(GetKeyBytes(key), origValue.getBytes(Conf.get("common.encode")), DES.DESede));
} catch (Exception e) {
logger.error("加密失败", e);
}
return str;
}
/***
* 用配置文件的配置做为key加密
*
* @param origValue
* 要加密的数数据
* @return 加密后的数据
*/
public static String Encrypt3DES(String origValue) {
return Encrypt3DES(origValue, Conf.get("3des.key"));
}
/***
* 通过key 用3DES加密,是Encrypt3DES的逆过程
*
* @param value
* 要解密的密文
* @param key
* 要解密的key值
* @return 解密后的原值
*/
public static String Decrypt3DES(String value, String key) {
try {
byte[] b = decryptMode(GetKeyBytes(key), new Base64().decode(value), DES.DESede);
return new String(b);
} catch (Exception e) {
logger.error("解密失败", e);
return null;
}
}
/***
* 用配置文件的配置做为key解密
*
* @param value
* 要解密的密文
* @return 解密后的源文
*/
public static String Decrypt3DES(String value) {
return Decrypt3DES(value, Conf.get("3des.key"));
}
/***
* 把base64字符转原文的字节码
*
* @param p_Str
* @return 原文的二进制形式
* @throws IOException
*/
public static byte[] fromBase64(String p_Str) throws IOException {
return new BASE64Decoder().decodeBuffer(p_Str);
}
/***
* 把原文件转为base64编码
*
* @param bPic
* @return Base编码
*/
public static String toBase64(byte[] bPic) {
return new BASE64Encoder().encode(bPic);
}
/////////////////////////////////////////////////////////////////////////////////////////////////////////////
public static byte[] md5(byte data[]) {
return getMd5Digest().digest(data);
}
public static byte[] md5(InputStream is) throws IOException {
return digest(getMd5Digest(), is);
}
public static byte[] sha(byte data[]) {
return getShaDigest().digest(data);
}
public static byte[] sha(InputStream is) throws IOException {
return digest(getShaDigest(), is);
}
private static MessageDigest getMd5Digest() {
return getDigest("MD5");
}
private static MessageDigest getShaDigest() {
return getDigest("SHA");
}
private static MessageDigest getDigest(String algorithm) {
try {
return MessageDigest.getInstance(algorithm);
} catch (NoSuchAlgorithmException e) {
throw new RuntimeException(e);
}
}
private static byte[] digest(MessageDigest md, InputStream is) throws IOException {
final byte buffer[] = new byte[4096];
for (int count = is.read(buffer); count > 0; count = is.read(buffer)) {
md.update(buffer, 0, count);
}
return md.digest();
}
}
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