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// Copyright 2024 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CRYPTO_SUBTLE_PASSKEY_H_
#define CRYPTO_SUBTLE_PASSKEY_H_
#include "crypto/crypto_export.h"
namespace ash {
class CryptohomeTokenEncryptor;
class Key;
}
namespace syncer {
class Nigori;
}
namespace crypto {
class SubtlePassKey;
} // namespace crypto
namespace chromeos::onc {
crypto::SubtlePassKey MakeCryptoPassKey();
}
namespace os_crypt_async {
class FreedesktopSecretKeyProvider;
}
class OSCryptImpl;
namespace crypto {
// A crypto::SubtlePassKey allows you to call subtle, difficult-to-get-right, or
// mistake-prone APIs, or APIs that allow you to make detailed cryptographic
// choices for yourself. See //docs/patterns/passkey.md for details.
//
// Note: this has no relation at all to the "passkey" WebAuthN mechanism.
class CRYPTO_EXPORT SubtlePassKey final {
public:
~SubtlePassKey();
// Test code is always allowed to use these APIs.
static SubtlePassKey ForTesting();
private:
SubtlePassKey();
// Deprecated: remove this once the DeriveKey*() methods are deleted from
// SymmetricKey.
friend class SymmetricKey;
// This class uses custom PBKDF2 parameters, and has to keep doing so for
// compatibility with persisted data on disk.
friend class ash::CryptohomeTokenEncryptor;
// This class uses custom PBKDF2 parameters - the Nigori spec requires this.
friend class syncer::Nigori;
// ONC EncryptedConfiguration objects can contain and require us to use
// arbitrary (possibly attacker-supplied) PBKDF2 parameters.
friend SubtlePassKey chromeos::onc::MakeCryptoPassKey();
// These classes use custom PBKDF2 parameters and have to keep doing so for
// compatibility with existing persisted data.
friend class ::OSCryptImpl;
friend class os_crypt_async::FreedesktopSecretKeyProvider;
// This class uses custom PBKDF2 parameters which cannot be changed for
// compatibility with persisted data.
friend class ash::Key;
};
} // namespace crypto
#endif // CRYPTO_SUBTLE_PASSKEY_H_
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