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package com.zeapo.pwdstore.pwgen;
import android.content.Context;
import android.content.SharedPreferences;
import java.util.ArrayList;
public class pwgen {
static final int DIGITS = 0x0001;
static final int UPPERS = 0x0002;
static final int SYMBOLS = 0x0004;
static final int AMBIGUOUS = 0x0008;
static final int NO_VOWELS = 0x0010;
static final String DIGITS_STR = "0123456789";
static final String UPPERS_STR = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
static final String LOWERS_STR = "abcdefghijklmnopqrstuvwxyz";
static final String SYMBOLS_STR = "!\"#$%&'()*+,-./:;<=>?@[\\]^_`{|}~";
static final String AMBIGUOUS_STR = "B8G6I1l0OQDS5Z2";
static final String VOWELS_STR = "01aeiouyAEIOUY";
// No a, c, n, h, H, C, 1, N
private static final String pwOptions = "0ABsvy";
/**
* Sets password generation preferences.
*
* @param ctx context from which to retrieve SharedPreferences from
* preferences file 'pwgen'
* @param argv options for password generation
* <table summary="options for password generation">
* <tr><td>Option</td><td>Description</td></tr>
* <tr><td>0</td><td>don't include numbers</td></tr>
* <tr><td>A</td><td>don't include uppercase letters</td></tr>
* <tr><td>B</td><td>don't include ambiguous charactersl</td></tr>
* <tr><td>s</td><td>generate completely random passwords</td></tr>
* <tr><td>v</td><td>don't include vowels</td></tr>
* <tr><td>y</td><td>include at least one symbol</td></tr>
* </table>
* @param numArgv numerical options for password generation: length of
* generated passwords followed by number of passwords to
* generate
* @return <code>false</code> if a numerical options is invalid,
* <code>true</code> otherwise
*/
public static boolean setPrefs(Context ctx, ArrayList<String> argv
, int... numArgv) {
SharedPreferences prefs
= ctx.getSharedPreferences("pwgen", Context.MODE_PRIVATE);
SharedPreferences.Editor editor = prefs.edit();
for (char option : pwOptions.toCharArray()) {
if (argv.contains(String.valueOf(option))) {
editor.putBoolean(String.valueOf(option), true);
argv.remove(String.valueOf(option));
} else {
editor.putBoolean(String.valueOf(option), false);
}
}
for (int i = 0; i < numArgv.length && i < 2; i++) {
if (numArgv[i] <= 0) {
// Invalid password length or number of passwords
return false;
}
String name = i == 0 ? "length" : "num";
editor.putInt(name, numArgv[i]);
}
editor.apply();
return true;
}
/**
* Generates passwords using the preferences set by
* {@link #setPrefs(Context, ArrayList, int...)}.
*
* @param ctx context from which to retrieve SharedPreferences from
* preferences file 'pwgen'
* @return list of generated passwords
*/
public static ArrayList<String> generate(Context ctx) {
SharedPreferences prefs
= ctx.getSharedPreferences("pwgen", Context.MODE_PRIVATE);
boolean phonemes = true;
int pwgenFlags = DIGITS | UPPERS;
for (char option : pwOptions.toCharArray()) {
if (prefs.getBoolean(String.valueOf(option), false)) {
switch(option) {
case '0':
pwgenFlags &= ~DIGITS;
break;
case 'A':
pwgenFlags &= ~UPPERS;
break;
case 'B':
pwgenFlags |= AMBIGUOUS;
break;
case 's':
phonemes = false;
// pwgenFlags = DIGITS | UPPERS;
break;
case 'y':
pwgenFlags |= SYMBOLS;
break;
case 'v':
phonemes = false;
pwgenFlags |= NO_VOWELS; // | DIGITS | UPPERS;
break;
}
}
}
int length = prefs.getInt("length", 8);
if (length < 5) {
phonemes = false;
}
if (length <= 2) {
pwgenFlags &= ~UPPERS;
}
if (length <= 1) {
pwgenFlags &= ~DIGITS;
}
ArrayList<String> passwords = new ArrayList<>();
int num = prefs.getInt("num", 1);
for (int i = 0; i < num; i++) {
if (phonemes) {
passwords.add(pw_phonemes.phonemes(length, pwgenFlags));
} else {
passwords.add(pw_rand.rand(length, pwgenFlags));
}
}
return passwords;
}
}
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