option to remember challenge-response codes

app/scripts/const/default-app-settings.js

@@ -41,6 +41,7 @@ const DefaultAppSettings = {
     yubiKeyAutoOpen: false, // auto-load one-time codes when there are open files
     yubiKeyMatchEntries: true, // show matching one-time codes in entries
     yubiKeyShowChalResp: true, // show YubiKey challenge-response option
+    yubiKeyRememberChalResp: false, // remember YubiKey challenge-response codes while the app is open
     yubiKeyStuckWorkaround: false, // enable the workaround for stuck YubiKeys
 
     canOpen: true, // can select and open new files

app/scripts/locales/base.json

@@ -609,6 +609,7 @@
     "setDevicesYubiKeyChalRespDesc": "It's also possible to use a YubiKey in challenge-response mode, so that a piece of private key used to encrypt files resides on a YubiKey.",
     "setDevicesYubiKeyChalRespShow": "Show the option to use a YubiKey when opening files",
     "setDevicesYubiKeyStuckWorkaround": "Reconnect the YubiKey if it seems to be stuck during loading",
+    "setDevicesYubiKeyRememberChalResp": "Remember challenge-response while the app is open",
 
     "setAboutTitle": "About",
     "setAboutBuilt": "This app is built with these awesome tools",

app/scripts/models/file-model.js

@@ -5,6 +5,7 @@ import { Events } from 'framework/events';
 import { GroupCollection } from 'collections/group-collection';
 import { KdbxToHtml } from 'comp/format/kdbx-to-html';
 import { GroupModel } from 'models/group-model';
+import { AppSettingsModel } from 'models/app-settings-model';
 import { IconUrlFormat } from 'util/formatting/icon-url-format';
 import { Logger } from 'util/logger';
 import { mapObject } from 'util/fn';
@@ -346,7 +347,7 @@ class FileModel extends Model {
             keyFileChanged: false,
             syncing: false
         });
-        if (this.chalResp) {
+        if (this.chalResp && !AppSettingsModel.yubiKeyRememberChalResp) {
             ChalRespCalculator.clearCache(this.chalResp);
         }
     }

app/scripts/views/settings/settings-devices-view.js

@@ -15,6 +15,7 @@ class SettingsDevicesView extends View {
         'change .settings__yubikey-auto-open': 'changeYubiKeyAutoOpen',
         'change .settings__yubikey-match-entries': 'changeYubiKeyMatchEntries',
         'change .settings__yubikey-chalresp-show': 'changeYubiKeyShowChalResp',
+        'change .settings__yubikey-remember-chalresp': 'changeYubiKeyRememberChalResp',
         'change .settings__yubikey-stuck-workaround': 'changeYubiKeyStuckWorkaround'
     };
 
@@ -38,6 +39,7 @@ class SettingsDevicesView extends View {
             yubiKeyAutoOpen: AppSettingsModel.yubiKeyAutoOpen,
             yubiKeyMatchEntries: AppSettingsModel.yubiKeyMatchEntries,
             yubiKeyShowChalResp: AppSettingsModel.yubiKeyShowChalResp,
+            yubiKeyRememberChalResp: AppSettingsModel.yubiKeyRememberChalResp,
             yubiKeyStuckWorkaround: AppSettingsModel.yubiKeyStuckWorkaround,
             yubiKeyManualLink: Links.YubiKeyManual,
             ykmanInstallLink: Links.YubiKeyManagerInstall
@@ -70,6 +72,11 @@ class SettingsDevicesView extends View {
         this.render();
     }
 
+    changeYubiKeyRememberChalResp(e) {
+        AppSettingsModel.yubiKeyRememberChalResp = e.target.checked;
+        this.render();
+    }
+
     changeYubiKeyStuckWorkaround(e) {
         AppSettingsModel.yubiKeyStuckWorkaround = e.target.checked;
         this.render();

app/templates/settings/settings-devices.hbs

@@ -47,5 +47,10 @@
                    {{#if yubiKeyShowChalResp}}checked{{/if}} />
             <label for="settings__yubikey-chalresp-show">{{res 'setDevicesYubiKeyChalRespShow'}}</label>
         </div>
+        <div>
+            <input type="checkbox" class="settings__input input-base settings__yubikey-remember-chalresp" id="settings__yubikey-remember-chalresp"
+                   {{#if yubiKeyRememberChalResp}}checked{{/if}} />
+            <label for="settings__yubikey-remember-chalresp">{{res 'setDevicesYubiKeyRememberChalResp'}}</label>
+        </div>
     {{/if}}
 </div>