Removing encryption key if it already exists from a previous installation.

src/js/services/encryptionService.js

@@ -10,7 +10,8 @@
 
     var service = {
       decrypt: decrypt,
-      encrypt: encrypt
+      encrypt: encrypt,
+      removeKeyIfExists: removeKeyIfExists
     };
     return service;
 
@@ -141,5 +142,15 @@
       });
     };
 
+    function removeKeyIfExists() {
+      secureStorageService.remove(storageKey, function onKeyRemoved(err){
+        if (err) {
+          $log.Error('Error removing key.', err);
+          return;
+        }
+        $log.debug('Key removed.');
+      });
+    }
+
   });
 })();

src/js/services/mobileSecureStorageService.js

@@ -57,6 +57,32 @@ angular.module('copayApp.services').factory('mobileSecureStorageService', functi
       key);
   };
 
+  root.remove = function(key, cb) {
+    
+    if (!platformInfo.isMobile) {
+      cb(new Error('mobileSecureStorageService is only available on mobile.'));
+    } 
+
+    if (!isReady) {
+      if (initialisationFailed) {
+        cb(new Error('mobileSecureStorageService initialisation failed.'));
+      } else {
+        pending.push(function(){ root.remove(key, cb); });
+      }
+      return;
+    }
+
+    storage.remove(
+      function (value) { 
+        cb();
+      },
+      function (error) { 
+        cb(new Error(error));
+      },
+      key);
+
+  };
+
   root.set = function(key, value, cb) {
     
     if (!platformInfo.isMobile) {

src/js/services/secureStorageService.js

@@ -16,7 +16,17 @@ angular.module('copayApp.services').factory('secureStorageService', function(des
     } else { // Browser
       localStorageService.get(alteredKeyIndicatingDesireForSecureStorage(k), cb);
     }
-  }
+  };
+
+  root.remove = function(k, cb) {
+    if (platformInfo.isMobile) {
+      mobileSecureStorageService.remove(k, cb);
+    } else if (platformInfo.isNW) {
+      desktopSecureStorageService.remove(k, cb);
+    } else { // Browser
+      localStorageService.remove(alteredKeyIndicatingDesireForSecureStorage(k), cb);
+    }
+  };
 
   root.set = function(k, v, cb) {
     if (platformInfo.isMobile) {
@@ -26,7 +36,7 @@ angular.module('copayApp.services').factory('secureStorageService', function(des
     } else { // Browser
       localStorageService.set(alteredKeyIndicatingDesireForSecureStorage(k), v, cb);
     }
-  }
+  };
   
   return root;
 });

src/js/services/storageService.js

@@ -269,6 +269,8 @@ angular.module('copayApp.services')
 
         if (!profileStr) {
           $log.debug('No string loaded, returning nothing.');
+          // Don't want to use the same key as a previous installation
+          encryptionService.removeKeyIfExists();
           return cb(null, null);
         }