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modified PasswordUtils to use a StringBuilder #108

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modified PasswordUtils to use a StringBuilder #108

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190 changes: 95 additions & 95 deletions src/main/java/com/shzlw/poli/util/PasswordUtils.java
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Original file line number Diff line number Diff line change
@@ -1,118 +1,118 @@
package com.shzlw.poli.util;

import javax.crypto.Cipher;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;
import java.math.BigInteger;
import java.nio.ByteBuffer;
import java.security.MessageDigest;
import java.util.Base64;
import java.util.UUID;
import javax.crypto.Cipher;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;

public final class PasswordUtils {

private PasswordUtils() {}

public static synchronized String getUniqueId() {
return uuidToBase64(UUID.randomUUID().toString());
}

private static String uuidToBase64(String str) {
UUID uuid = UUID.fromString(str);
ByteBuffer bb = ByteBuffer.wrap(new byte[16]);
bb.putLong(uuid.getMostSignificantBits());
bb.putLong(uuid.getLeastSignificantBits());
return Base64.getUrlEncoder().withoutPadding().encodeToString(bb.array());
private PasswordUtils() {}

public static synchronized String getUniqueId() {
return uuidToBase64(UUID.randomUUID().toString());
}

private static String uuidToBase64(String str) {
UUID uuid = UUID.fromString(str);
ByteBuffer bb = ByteBuffer.wrap(new byte[16]);
bb.putLong(uuid.getMostSignificantBits());
bb.putLong(uuid.getLeastSignificantBits());
return Base64.getUrlEncoder().withoutPadding().encodeToString(bb.array());
}

public static String getMd5Hash(String s) {
String rt = "";
try {
MessageDigest m = MessageDigest.getInstance("MD5");
m.reset();
m.update(s.getBytes());
byte[] digest = m.digest();
BigInteger bigInt = new BigInteger(1, digest);
StringBuilder hashtext = new StringBuilder(bigInt.toString(16));
while (hashtext.length() < 32) {
hashtext.append("0" + hashtext);
}
return hashtext.toString();
} catch (Exception e) {
e.printStackTrace();
}

public static String getMd5Hash(String s) {
String rt = "";
try {
MessageDigest m = MessageDigest.getInstance("MD5");
m.reset();
m.update(s.getBytes());
byte[] digest = m.digest();
BigInteger bigInt = new BigInteger(1, digest);
String hashtext = bigInt.toString(16);
while (hashtext.length() < 32) {
hashtext = "0" + hashtext;
}
return hashtext;
} catch(Exception e) {
e.printStackTrace();
}
return rt;
return rt;
}

public static String encrypt(String value) {
return encrypt(value, Constants.ENCRYPT_IV, Constants.ENCRYPT_KEY);
}

public static String decrypt(String value) {
return decrypt(value, Constants.ENCRYPT_IV, Constants.ENCRYPT_KEY);
}

public static String encrypt(String value, String initVector, String key) {
String rt = "";
try {
IvParameterSpec iv = new IvParameterSpec(initVector.getBytes("UTF-8"));
SecretKeySpec skeySpec = new SecretKeySpec(key.getBytes("UTF-8"), "AES");

Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5PADDING");
cipher.init(Cipher.ENCRYPT_MODE, skeySpec, iv);
byte[] encrypted = cipher.doFinal(value.getBytes());
rt = new String(Base64.getEncoder().encodeToString(encrypted));
} catch (Exception e) {
}

public static String encrypt(String value) {
return encrypt(value, Constants.ENCRYPT_IV, Constants.ENCRYPT_KEY);
}
return rt;
}

public static String decrypt(String value) {
return decrypt(value, Constants.ENCRYPT_IV, Constants.ENCRYPT_KEY);
}
public static String decrypt(String val, String initVector, String key) {
String rt = "";
try {
IvParameterSpec iv = new IvParameterSpec(initVector.getBytes("UTF-8"));
SecretKeySpec skeySpec = new SecretKeySpec(key.getBytes("UTF-8"), "AES");

public static String encrypt(String value, String initVector, String key) {
String rt = "";
try {
IvParameterSpec iv = new IvParameterSpec(initVector.getBytes("UTF-8"));
SecretKeySpec skeySpec = new SecretKeySpec(key.getBytes("UTF-8"), "AES");
Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5PADDING");
cipher.init(Cipher.DECRYPT_MODE, skeySpec, iv);

Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5PADDING");
cipher.init(Cipher.ENCRYPT_MODE, skeySpec, iv);
byte[] encrypted = cipher.doFinal(value.getBytes());
rt = new String(Base64.getEncoder().encodeToString(encrypted));
} catch (Exception e) {
}

return rt;
byte[] decrypted = cipher.doFinal(Base64.getDecoder().decode(val));
rt = new String(decrypted);
} catch (Exception e) {
}

public static String decrypt(String val, String initVector, String key) {
String rt = "";
try {
IvParameterSpec iv = new IvParameterSpec(initVector.getBytes("UTF-8"));
SecretKeySpec skeySpec = new SecretKeySpec(key.getBytes("UTF-8"), "AES");

Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5PADDING");
cipher.init(Cipher.DECRYPT_MODE, skeySpec, iv);

byte[] decrypted = cipher.doFinal(Base64.getDecoder().decode(val));
rt = new String(decrypted);
} catch (Exception e) {
}
return rt;
}

public static String getEncryptedPassword(String password) {
String p = password == null ? "" : password;
return encrypt(Constants.PASSWORD_SALT + p);
return rt;
}

public static String getEncryptedPassword(String password) {
String p = password == null ? "" : password;
return encrypt(Constants.PASSWORD_SALT + p);
}

public static String getDecryptedPassword(String password) {
String p = decrypt(password);
int saltLength = Constants.PASSWORD_SALT.length();
return p.substring(saltLength);
}

public static String padOrTrimTo16(String str) {
String s = str;
if (str == null) {
s = "";
}

public static String getDecryptedPassword(String password) {
String p = decrypt(password);
int saltLength = Constants.PASSWORD_SALT.length();
return p.substring(saltLength);
if (s.length() == 16) {
return s;
} else if (s.length() > 16) {
return s.substring(0, 16);
}

public static String padOrTrimTo16(String str) {
String s = str;
if (str == null) {
s = "";
}

if (s.length() == 16) {
return s;
} else if (s.length() > 16) {
return s.substring(0, 16);
}

int l = 16 - s.length();
StringBuilder sb = new StringBuilder();
for (int i = 0; i < l; i++) {
sb.append("0");
}
sb.append(s);
return sb.toString();
int l = 16 - s.length();
StringBuilder sb = new StringBuilder();
for (int i = 0; i < l; i++) {
sb.append("0");
}
sb.append(s);
return sb.toString();
}
}