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net/quic/crypto/quic_decrypter.h

 // Copyright (c) 2012 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 NET_QUIC_CRYPTO_QUIC_DECRYPTER_H_
 #define NET_QUIC_CRYPTO_QUIC_DECRYPTER_H_
 
 #include "net/base/net_export.h"
 #include "net/quic/quic_protocol.h"
 
@@ skipping 21 matching lines @@
   //                          <------------ 64 bits ----------->
   //   +---------------------+----------------------------------+
   //   |    Fixed prefix     |      Packet sequence number      |
   //   +---------------------+----------------------------------+
   //                          Nonce format
   //
   // The security of the nonce format requires that QUIC never reuse a
   // packet sequence number, even when retransmitting a lost packet.
   virtual bool SetNoncePrefix(base::StringPiece nonce_prefix) = 0;
 
-  // Decrypt authenticates |associated_data| and |ciphertext| and then decrypts
-  // |ciphertext| into |output|, using |nonce|. |nonce| must be 8 bytes longer
-  // than the nonce prefix length returned by GetNoncePrefixSize() (of the
-  // encrypter). |output| must be as long as |ciphertext| on entry and, on
-  // successful return, the true length of the plaintext will be written to
-  // |*output_length|.
-  virtual bool Decrypt(base::StringPiece nonce,
-                       base::StringPiece associated_data,
-                       base::StringPiece ciphertext,
-                       unsigned char* output,
-                       size_t* output_length) = 0;
-
   // Returns a newly created QuicData object containing the decrypted
   // |ciphertext| or nullptr if there is an error. |sequence_number| is
   // appended to the |nonce_prefix| value provided in SetNoncePrefix()
   // to form the nonce.
   // TODO(wtc): add a way for DecryptPacket to report decryption failure due
   // to non-authentic inputs, as opposed to other reasons for failure.
   virtual QuicData* DecryptPacket(QuicPacketSequenceNumber sequence_number,
                                   base::StringPiece associated_data,
                                   base::StringPiece ciphertext) = 0;
 
   // For use by unit tests only.
   virtual base::StringPiece GetKey() const = 0;
   virtual base::StringPiece GetNoncePrefix() const = 0;
 };
 
 }  // namespace net
 
 #endif  // NET_QUIC_CRYPTO_QUIC_DECRYPTER_H_