root / src / com / rackspacecloud / android / PasswordManager.java @ c476482b
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package com.rackspacecloud.android; |
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import java.security.MessageDigest; |
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import java.security.NoSuchAlgorithmException; |
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import java.util.Arrays; |
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import android.content.SharedPreferences; |
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public class PasswordManager { |
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private SharedPreferences settings;
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public PasswordManager(SharedPreferences sp){
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settings = sp; |
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} |
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/*
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* checks the parameter string against the stored
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* password
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*/
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public boolean verifyEnteredPassword(String password) { |
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return Arrays.toString(getHash(password)).equals(getStoredPassword()); |
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} |
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/*
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* return the hash of the password that is stored in
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* shared preferences
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*/
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private String getStoredPassword(){ |
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return settings.getString(Preferences.PREF_KEY_PASSCODE_HASH, ""); |
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} |
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/*
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* turns off password requirement
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*/
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public void turnOffPassword() { |
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SharedPreferences.Editor editor = settings.edit(); |
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editor.putString(Preferences.PREF_KEY_PASSCODE_HASH, ""); |
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editor.putBoolean(Preferences.PREF_KEY_PASSWORD_LOCK, false); |
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editor.commit(); |
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} |
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/*
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* submits a password change into memory
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* stores the sha-256 hash of the password
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*/
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private void storeNewPassword(String hashedPassword) { |
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SharedPreferences.Editor editor = settings.edit(); |
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editor.putString(Preferences.PREF_KEY_PASSCODE_HASH, hashedPassword);
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editor.putBoolean(Preferences.PREF_KEY_PASSWORD_LOCK, true); |
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editor.commit(); |
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} |
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/*
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* changes the password for
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*/
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public void changePassword(String password) { |
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storeNewPassword(Arrays.toString(getHash(password)));
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} |
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/*
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* returns the sha-256 hash for a given
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* string
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*/
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private byte[] getHash(String password) { |
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MessageDigest m = null; |
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try {
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m = MessageDigest.getInstance("SHA-256"); |
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m.update(password.getBytes()); |
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} catch (NoSuchAlgorithmException e) { |
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// TODO Auto-generated catch block
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e.printStackTrace(); |
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} catch (NullPointerException e) { |
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// TODO Auto-generated catch block
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e.printStackTrace(); |
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} |
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return m.digest();
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} |
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/*
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* returns true if their is a password requirement
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*/
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public boolean hasPassword() { |
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return settings.getBoolean(Preferences.PREF_KEY_PASSWORD_LOCK, false); |
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} |
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} |