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47 lines
1.9 KiB
C++
47 lines
1.9 KiB
C++
// Copyright 2013 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef CRYPTO_NSS_CRYPTO_MODULE_DELEGATE_H_
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#define CRYPTO_NSS_CRYPTO_MODULE_DELEGATE_H_
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#include <string>
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#include "base/memory/ref_counted.h"
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namespace crypto {
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// PK11_SetPasswordFunc is a global setting. An implementation of
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// CryptoModuleBlockingPasswordDelegate should be passed using wincx() as the
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// user data argument (|wincx|) to relevant NSS functions, which the global
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// password handler will call to do the actual work. This delegate should only
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// be used in NSS calls on worker threads due to the blocking nature.
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class CryptoModuleBlockingPasswordDelegate
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: public base::RefCountedThreadSafe<CryptoModuleBlockingPasswordDelegate> {
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public:
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// Return a value suitable for passing to the |wincx| argument of relevant NSS
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// functions. This should be used instead of passing the object pointer
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// directly to avoid accidentally casting a pointer to a subclass to void* and
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// then casting back to a pointer of the base class
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void* wincx() { return this; }
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// Requests a password to unlock |slot_name|. The interface is synchronous
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// because NSS cannot issue an asynchronous request. |retry| is true if this
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// is a request for the retry and we previously returned the wrong password.
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// The implementation should set |*cancelled| to true if the user cancelled
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// instead of entering a password, otherwise it should return the password the
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// user entered.
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virtual std::string RequestPassword(const std::string& slot_name, bool retry,
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bool* cancelled) = 0;
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protected:
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friend class base::RefCountedThreadSafe<CryptoModuleBlockingPasswordDelegate>;
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virtual ~CryptoModuleBlockingPasswordDelegate() {}
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};
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} // namespace crypto
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#endif // CRYPTO_NSS_CRYPTO_MODULE_DELEGATE_H_
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