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[chromium-blink-merge.git] / net / quic / crypto / null_encrypter.h
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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
5 #ifndef NET_QUIC_CRYPTO_NULL_ENCRYPTER_H_
6 #define NET_QUIC_CRYPTO_NULL_ENCRYPTER_H_
8 #include "base/compiler_specific.h"
9 #include "net/base/net_export.h"
10 #include "net/quic/crypto/quic_encrypter.h"
12 namespace net {
14 // A NullEncrypter is a QuicEncrypter used before a crypto negotiation
15 // has occurred. It does not actually encrypt the payload, but does
16 // generate a MAC (fnv128) over both the payload and associated data.
17 class NET_EXPORT_PRIVATE NullEncrypter : public QuicEncrypter {
18 public:
19 NullEncrypter();
20 ~NullEncrypter() override {}
22 // QuicEncrypter implementation
23 bool SetKey(base::StringPiece key) override;
24 bool SetNoncePrefix(base::StringPiece nonce_prefix) override;
25 bool EncryptPacket(QuicPacketSequenceNumber sequence_number,
26 base::StringPiece associated_data,
27 base::StringPiece plaintext,
28 char* output,
29 size_t* output_length,
30 size_t max_output_length) override;
31 size_t GetKeySize() const override;
32 size_t GetNoncePrefixSize() const override;
33 size_t GetMaxPlaintextSize(size_t ciphertext_size) const override;
34 size_t GetCiphertextSize(size_t plaintext_size) const override;
35 base::StringPiece GetKey() const override;
36 base::StringPiece GetNoncePrefix() const override;
38 private:
39 size_t GetHashLength() const;
41 DISALLOW_COPY_AND_ASSIGN(NullEncrypter);
44 } // namespace net
46 #endif // NET_QUIC_CRYPTO_NULL_ENCRYPTER_H_