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;
@Slf4j
public 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);
解决Linux,window 系统差异
原文地址：http://blog.51cto.com/superhakce/2090394
