com.trustedkey.trustedkeyframework

Class SignedSettingUtils

java.lang.Object

com.trustedkey.trustedkeyframework.SignedSettingUtils

public class SignedSettingUtils
extends java.lang.Object

Handle signed settings on Android. Since Android (unlike iOS) does not store it's settings in a keychain these are susceptible for tampering. We fix this by cryptographically signing the settings.

Constructor Summary

Constructors

Constructor and Description
SignedSettingUtils()

Method Summary

Modifier and Type	Method and Description
static boolean	getSignedBoolPreference(java.lang.String sharedPrefKey, boolean defaultValue, android.content.Context context)
static boolean	hasSignedPreference(java.lang.String sharedPrefKey, android.content.Context context)
static void	removeSignedPreference(java.lang.String sharedPrefKey, android.content.Context context)
static void	setSignedBoolPreference(java.lang.String sharedPrefKey, boolean value, android.content.Context context) Save a boolean setting in SharedPreferences signed with

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

SignedSettingUtils

public SignedSettingUtils()

Method Detail

setSignedBoolPreference

public static void setSignedBoolPreference(java.lang.String sharedPrefKey,
                                           boolean value,
                                           android.content.Context context)
                                    throws android.security.KeyChainException,
                                           android.security.keystore.KeyNotYetValidException

Save a boolean setting in SharedPreferences signed with

Parameters:

sharedPrefKey - Shared preference key to set

value - Boolean value to set

context -

Throws:

android.security.KeyChainException

android.security.keystore.KeyNotYetValidException

getSignedBoolPreference

public static boolean getSignedBoolPreference(java.lang.String sharedPrefKey,
                                              boolean defaultValue,
                                              android.content.Context context)

Parameters:

sharedPrefKey - Shared preference key to get

defaultValue - Fallback value in case of non-existent key or failed signature check

context -

Returns:

Boolean indicating preference value

hasSignedPreference

public static boolean hasSignedPreference(java.lang.String sharedPrefKey,
                                          android.content.Context context)

Parameters:

sharedPrefKey - Shared preference key to get

context -

Returns:

Boolean indicating preference value is set

removeSignedPreference

public static void removeSignedPreference(java.lang.String sharedPrefKey,
                                          android.content.Context context)