diff -r 000000000000 -r 6474c204b198 security/manager/ssl/public/nsIDataSignatureVerifier.idl
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/security/manager/ssl/public/nsIDataSignatureVerifier.idl	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,26 @@
+/* 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/. */
+
+
+#include "nsISupports.idl"
+
+/**
+ * An interface for verifying that a given string of data was signed by the
+ * private key matching the given public key.
+ */
+[scriptable, uuid(0a84b3d5-6ba9-432d-89da-4fbd0b0f2aec)]
+interface nsIDataSignatureVerifier : nsISupports
+{
+  /**
+   * Verifies that the data matches the data that was used to generate the
+   * signature.
+   *
+   * @param aData      The data to be tested.
+   * @param aSignature The signature of the data, base64 encoded.
+   * @param aPublicKey The public part of the key used for signing, DER encoded
+   *                   then base64 encoded.
+   * @returns true if the signature matches the data, false if not.
+   */
+  boolean verifyData(in ACString aData, in ACString aSignature, in ACString aPublicKey);
+};