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package util;
import org.apache.commons.codec.binary.Hex;
import javax.crypto.Mac;
import javax.crypto.spec.SecretKeySpec;
import java.security.InvalidKeyException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
public class CipherUtil {
// 十六进制下数字到字符的映射数组
private final static String[] hexDigits = { "0", "1", "2", "3", "4", "5",
"6", "7", "8", "9", "a", "b", "c", "d", "e", "f" };
/** * 把inputString加密 */
public static String generatePassword(String inputString) {
return encodeByMD5(inputString);
}
/**
* 验证输入的密码是否正确
*
* @param password
* 加密后的密码
* @param inputString
* 输入的字符串
* @return 验证结果,TRUE:正确 FALSE:错误
*/
public static boolean validatePassword(String password, String inputString) {
if (password.equals(encodeByMD5(inputString))) {
return true;
} else {
return false;
}
}
/** 对字符串进行MD5加密 */
private static String encodeByMD5(String originString) {
if (originString != null) {
try {
// 创建具有指定算法名称的信息摘要
MessageDigest md = MessageDigest.getInstance("MD5");
// 使用指定的字节数组对摘要进行最后更新,然后完成摘要计算
byte[] results = md.digest(originString.getBytes());
// 将得到的字节数组变成字符串返回
String resultString = byteArrayToHexString(results);
return resultString.toUpperCase();
} catch (Exception ex) {
ex.printStackTrace();
}
}
return null;
}
/**
* 转换字节数组为十六进制字符串
*
* @param b 字节数组
* @return 十六进制字符串
*/
private static String byteArrayToHexString(byte[] b) {
StringBuffer resultSb = new StringBuffer();
for (int i = 0; i < b.length; i++) {
resultSb.append(byteToHexString(b[i]));
}
return resultSb.toString();
}
/** 将一个字节转化成十六进制形式的字符串 */
private static String byteToHexString(byte b) {
int n = b;
if (n < 0)
n = 256 + n;
int d1 = n / 16;
int d2 = n % 16;
return hexDigits[d1] + hexDigits[d2];
}
/**
* 生成签名数据
*
* @param message
* 待加密的数据
* @param key
* 加密使用的key
* @throws InvalidKeyException
* @throws NoSuchAlgorithmException
*/
public static String hmacMd5Encode(String key, String message)
throws Exception {
SecretKeySpec keySpec = new SecretKeySpec(key.getBytes(), "HmacMD5");
Mac mac = Mac.getInstance("HmacMD5");
mac.init(keySpec);
byte[] rawHmac = mac.doFinal(message.getBytes());
return Hex.encodeHexString(rawHmac);
}
public static void main(String[] args) {
// String str = generatePassword("123");
//account.getEmail()
// + resource.getName() + resource.getPlatform() + dateStr
/* System.out.println(generatePassword("demo@reyun.com金融产品iOS"+DateUtil
.getCurrentDateStr(DateUtil.C_TIME_PATTON_DEFAULT)).toLowerCase());*/
}
}