Bug 774964 - Implement the getPKCS12FilePassword dialog in native fennec. r=mfinkle

mobile/android/components/NSSDialogService.js

@@ -81,9 +81,17 @@ NSSDialogs.prototype = {
   },
 
   getPKCS12FilePassword: function(aCtx, aPassword) {
-    // this dialog is never shown in Fennec; in Desktop it is shown while backing up a personal
-    // certificate to a file via Preferences->Advanced->Encryption->View Certificates->Your Certificates
-    throw "Unimplemented";
+    let response = this.showPrompt(this.getString("pkcs12.getpassword.title"),
+                                   this.getString("pkcs12.getpassword.message"),
+                                   [ this.getString("nssdialogs.ok.label"),
+                                     this.getString("nssdialogs.cancel.label")
+                                   ],
+                                   [ { type: "password", id: "pw" } ]);
+    if (response.button != 0) {
+      return false;
+    }
+    aPassword.value = response.pw;
+    return true;
   },
 
   certInfoSection: function(aHeading, aDataPairs, aTrailingNewline = true) {

mobile/android/locales/en-US/chrome/pippki.properties

@@ -14,6 +14,8 @@ downloadCert.trustEmail=Trust to identify email users.
 downloadCert.trustObjSign=Trust to identify software developers.
 caCertExists.title=Certificate Exists
 caCertExists.message=The Certificate already exists.
+pkcs12.getpassword.title=Password Entry Dialog
+pkcs12.getpassword.message=Please enter the password that was used to encrypt this certificate backup.
 
 certmgr.title=Certificate Details
 # These strings are stolen from security/manager/locales/en-US/chrome/pippki/certManager.dtd