1 files changed, 123 insertions, 0 deletions
diff --git a/comm/mail/extensions/openpgp/content/ui/backupKeyPassword.js b/comm/mail/extensions/openpgp/content/ui/backupKeyPassword.js
new file mode 100644
index 0000000000..9916429bcb
--- /dev/null
+++ b/comm/mail/extensions/openpgp/content/ui/backupKeyPassword.js
@@ -0,0 +1,123 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+"use strict";
+
+/**
+ * @file Implements the functionality of backupKeyPassword.xhtml:
+ *       a dialog that lets the user enter the password used to protect
+ *       a backup of OpenPGP secret keys.
+ *       Based on setp12password.js and setp12password.xhtml
+ */
+
+/**
+ * @property {boolean} confirmedPassword
+ *           Set to true if the user entered two matching passwords and
+ *           confirmed the dialog.
+ * @property {string} password
+ *           The password the user entered. Undefined value if
+ *           |confirmedPassword| is not true.
+ */
+
+let gAcceptButton;
+
+window.addEventListener("DOMContentLoaded", onLoad);
+
+/**
+ * onload() handler.
+ */
+function onLoad() {
+  // Ensure the first password textbox has focus.
+  document.getElementById("pw1").focus();
+  document.addEventListener("dialogaccept", onDialogAccept);
+  gAcceptButton = document
+    .getElementById("backupKeyPassword")
+    .getButton("accept");
+  gAcceptButton.disabled = true;
+}
+
+/**
+ * ondialogaccept() handler.
+ */
+function onDialogAccept() {
+  window.arguments[0].okCallback(
+    document.getElementById("pw1").value,
+    window.arguments[0].fprArray,
+    window.arguments[0].file,
+    true
+  );
+}
+
+/**
+ * Calculates the strength of the given password, suitable for use in updating
+ * a progress bar that represents said strength.
+ *
+ * The strength of the password is calculated by checking the number of:
+ *   - Characters
+ *   - Numbers
+ *   - Non-alphanumeric chars
+ *   - Upper case characters
+ *
+ * @param {string} password
+ *        The password to calculate the strength of.
+ * @returns {number}
+ *          The strength of the password in the range [0, 100].
+ */
+function getPasswordStrength(password) {
+  let lengthStrength = password.length;
+  if (lengthStrength > 5) {
+    lengthStrength = 5;
+  }
+
+  let nonNumericChars = password.replace(/[0-9]/g, "");
+  let numericStrength = password.length - nonNumericChars.length;
+  if (numericStrength > 3) {
+    numericStrength = 3;
+  }
+
+  let nonSymbolChars = password.replace(/\W/g, "");
+  let symbolStrength = password.length - nonSymbolChars.length;
+  if (symbolStrength > 3) {
+    symbolStrength = 3;
+  }
+
+  let nonUpperAlphaChars = password.replace(/[A-Z]/g, "");
+  let upperAlphaStrength = password.length - nonUpperAlphaChars.length;
+  if (upperAlphaStrength > 3) {
+    upperAlphaStrength = 3;
+  }
+
+  let strength =
+    lengthStrength * 10 -
+    20 +
+    numericStrength * 10 +
+    symbolStrength * 15 +
+    upperAlphaStrength * 10;
+  if (strength < 0) {
+    strength = 0;
+  }
+  if (strength > 100) {
+    strength = 100;
+  }
+
+  return strength;
+}
+
+/**
+ * oninput() handler for both password textboxes.
+ *
+ * @param {boolean} recalculatePasswordStrength
+ *                  Whether to recalculate the strength of the first password.
+ */
+function onPasswordInput(recalculatePasswordStrength) {
+  let pw1 = document.getElementById("pw1").value;
+
+  if (recalculatePasswordStrength) {
+    document.getElementById("pwmeter").value = getPasswordStrength(pw1);
+  }
+
+  // Disable the accept button if the two passwords don't match, and enable it
+  // if the passwords do match.
+  let pw2 = document.getElementById("pw2").value;
+  gAcceptButton.disabled = pw1 != pw2 || !pw1.length;
+}