// Copyright 2012 Citrix Systems, Inc. Licensed under the
// Apache License, Version 2.0 (the "License"); you may not use this
// file except in compliance with the License. Citrix Systems, Inc.
// reserves all rights not expressly granted by the License.
// You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
// Automatically generated by addcopyright.py at 04/03/2012
package com.cloud.utils;
import java.security.SecureRandom;
import java.util.Random;
/**
* Generate random passwords
*
*/
public class PasswordGenerator {
//Leave out visually confusing l,L,1,o,O,0
static private char[] lowerCase = new char[]{'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'm', 'n', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z'};
static private char[] upperCase = new char[]{'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'M', 'N', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z'};
static private char[] numeric = new char[]{'2', '3', '4', '5', '6', '7', '8', '9'};
static private char[] alphaNumeric = new char[]{'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'J', 'K', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z',
'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'j', 'k', 'm', 'n', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z',
'2', '3', '4', '5', '6', '7', '8', '9'};
public static String generateRandomPassword(int num) {
Random r = new SecureRandom();
StringBuilder password = new StringBuilder();
// Generate random 3-character string with a lowercase character,
// uppercase character, and a digit
password.append(generateLowercaseChar(r))
.append(generateUppercaseChar(r))
.append(generateDigit(r));
// Generate a random n-character string with only lowercase
// characters
for (int i = 0; i < num; i++) {
password.append(generateLowercaseChar(r));
}
return password.toString();
}
private static char generateLowercaseChar(Random r) {
return lowerCase[r.nextInt(lowerCase.length)];
}
private static char generateDigit(Random r ) {
return numeric[r.nextInt(numeric.length)];
}
private static char generateUppercaseChar(Random r) {
return upperCase[r.nextInt(upperCase.length)];
}
private static char generateAlphaNumeric(Random r) {
return alphaNumeric[r.nextInt(alphaNumeric.length)];
}
public static String generatePresharedKey(int numChars) {
Random r = new SecureRandom();
StringBuilder psk = new StringBuilder();
for (int i = 0; i < numChars; i++) {
psk.append(generateAlphaNumeric(r));
}
return psk.toString();
}
public static String rot13(final String password) {
final StringBuffer newPassword = new StringBuffer("");
for (int i = 0; i < password.length(); i++) {
char c = password.charAt(i);
if ((c >= 'a' && c <= 'm') || ((c >= 'A' && c <= 'M'))) {
c += 13;
} else if ((c >= 'n' && c <= 'z') || (c >= 'N' && c <= 'Z')) {
c -= 13;
}
newPassword.append(c);
}
return newPassword.toString();
}
public static void main(String [] args) {
for (int i=0; i < 100; i++) {
System.out.println("PSK: " + generatePresharedKey(24));
}
for (int i=0; i < 100; i++) {
System.out.println("Password: " + generateRandomPassword(6));
}
}
}