NSS: PKCS 11 password prompt.

base/crypto/pk11_blocking_password_delegate.h

+// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef BASE_CRYPTO_PK11_BLOCKING_PASSWORD_DELEGATE_H_
+#define BASE_CRYPTO_PK11_BLOCKING_PASSWORD_DELEGATE_H_
+#pragma once
+
+#include <string>
+
+namespace base {
+
+// PK11_SetPasswordFunc is a global setting.  An implementation of
+// PK11BlockingPasswordDelegate should be passed as the user data argument
+// (|wincx|) to relevant NSS functions, which the global password handler will
+// call to do the actual work.
+class PK11BlockingPasswordDelegate {
+ public:
+  virtual ~PK11BlockingPasswordDelegate() {}
+
+  // Requests a password to unlock |slot_name|. The interface is
+  // synchronous because NSS cannot issue an asynchronous
+  // request. |retry| is true if this is a request for the retry
+  // and we previously returned the wrong password.
+  // The implementation should set |*cancelled| to true if the user cancelled
+  // instead of entering a password, otherwise it should return the password the
+  // user entered.
+  virtual std::string RequestPassword(const std::string& slot_name, bool retry,
+                                      bool* cancelled) = 0;
+};
+
+}
+
+#endif  // BASE_CRYPTO_PK11_BLOCKING_PASSWORD_DELEGATE_H_