GNUnet  0.18.1
TCPRekey Struct Reference

TCP rekey message box. More...

Collaboration diagram for TCPRekey:
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Data Fields

struct GNUNET_MessageHeader header
 Type is GNUNET_MESSAGE_TYPE_COMMUNICATOR_TCP_REKEY. More...
 
struct GNUNET_ShortHashCode hmac
 HMAC for the following encrypted message. More...
 
struct GNUNET_CRYPTO_EcdhePublicKey ephemeral
 New ephemeral key. More...
 
struct GNUNET_CRYPTO_EddsaSignature sender_sig
 Sender's signature of type GNUNET_SIGNATURE_PURPOSE_COMMUNICATOR_TCP_REKEY. More...
 
struct GNUNET_TIME_AbsoluteNBO monotonic_time
 Monotonic time of sender, to possibly help detect replay attacks (if receiver persists times by sender). More...
 

Detailed Description

TCP rekey message box.

Always sent encrypted! Data after this message will use the new key.

Definition at line 277 of file gnunet-communicator-tcp.c.

Field Documentation

◆ header

struct GNUNET_MessageHeader TCPRekey::header

Type is GNUNET_MESSAGE_TYPE_COMMUNICATOR_TCP_REKEY.

Definition at line 3663 of file gnunet-communicator-tcp.c.

Referenced by inject_rekey().

◆ hmac

struct GNUNET_ShortHashCode TCPRekey::hmac

HMAC for the following encrypted message.

Yes, we MUST use mac-then-encrypt here, as we want to hide the message sizes on the wire (zero plaintext design!). Using CTR mode padding oracle attacks do not apply. Besides, due to the use of ephemeral keys (hopefully with effective replay protection from monotonic time!) the attacker is limited in using the oracle.

Definition at line 3663 of file gnunet-communicator-tcp.c.

Referenced by inject_rekey().

◆ ephemeral

struct GNUNET_CRYPTO_EcdhePublicKey TCPRekey::ephemeral

New ephemeral key.

Definition at line 3663 of file gnunet-communicator-tcp.c.

Referenced by do_rekey(), and inject_rekey().

◆ sender_sig

struct GNUNET_CRYPTO_EddsaSignature TCPRekey::sender_sig

Sender's signature of type GNUNET_SIGNATURE_PURPOSE_COMMUNICATOR_TCP_REKEY.

Definition at line 3663 of file gnunet-communicator-tcp.c.

Referenced by do_rekey(), and inject_rekey().

◆ monotonic_time

struct GNUNET_TIME_AbsoluteNBO TCPRekey::monotonic_time

Monotonic time of sender, to possibly help detect replay attacks (if receiver persists times by sender).

Definition at line 3663 of file gnunet-communicator-tcp.c.

Referenced by do_rekey(), and inject_rekey().


The documentation for this struct was generated from the following file: