fix(android): various fixes

[garymathews]

• Refactor decryption method
• Handle invalidated keys

TEST CASE

var TouchID = require('ti.identity');
    keychainItem = TouchID.createKeychainItem({
        identifier: 'test_key',
        accessibilityMode: TouchID.ACCESSIBLE_WHEN_PASSCODE_SET_THIS_DEVICE_ONLY,
        //accessControlMode: TouchID.ACCESS_CONTROL_TOUCH_ID_ANY // remove this to save without fingerprint authentication
    }),
    win = Ti.UI.createWindow({backgroundColor: 'white', layout: 'vertical'});
    queue = [],
    callback = function(e) {
        if (queue.length) {
            queue.shift().close();
        }
        alert(JSON.stringify(e, null, 1));
    };

// require device to passcode protected when determining deviceCanAuthenticate()
TouchID.authenticationPolicy = TouchID.AUTHENTICATION_POLICY_PASSCODE;
 
keychainItem.addEventListener('save', callback);
keychainItem.addEventListener('read', callback);
keychainItem.addEventListener('reset', callback);
keychainItem.addEventListener('update', callback);
 
button('SAVE', function() {
    showFingerprint();
    keychainItem.save('test_save');
});
button('READ', function() {
    showFingerprint();
    keychainItem.read();
});
button('RESET', function() {
    showFingerprint();
    keychainItem.reset();
});
button('UPDATE', function() {
    showFingerprint();
    keychainItem.update('test_update');
});
button('CAN AUTHENTICATE', function() {
    alert(JSON.stringify(TouchID.deviceCanAuthenticate(), null, 1));
});
button('INVALIDATE', function() {
    TouchID.invalidate();
});
 
win.open();
 
function showFingerprint() {
    if (keychainItem.accessControlMode !== TouchID.ACCESS_CONTROL_TOUCH_ID_ANY) return;
    var win = Ti.UI.createWindow({backgroundColor: 'white'}),
        img = Ti.UI.createImageView({image: 'http://bit.ly/2ur2X4u', width: 64, height: 64});
    queue.push(win);
    win.add(img);
    win.open();
}
function button(title, click) {
    var btn = Ti.UI.createButton({title: title, width: Ti.UI.FILL});
    btn.addEventListener('click', click);
    win.add(btn);
}

JIRA Ticket

[build]

	Messages
📖	💾 Here are the artifacts produced: ti.identity-iphone-1.1.0.zip
📖	✅ All tests are passing Nice one! All 61 tests are passing.

Generated by 🚫 dangerJS against a1a2a35

[hansemannn]

@garymathews It seems like this is a breaking change thats breaks every app that used the module before. Is there a way to migrate saved tokens here?