Crate twopoint 

Encrypted UDP messaging between two endpoints.

This crate provides a simple interface for establishing encrypted UDP connections between peers using AES-128-GCM encryption. Each peer can connect to one remote endpoint at a time and exchange binary messages securely.

Encryption Overhead

All messages have a 28-byte overhead (16-byte authentication tag + 12-byte nonce) added during encryption. Ensure receive buffers are large enough to accommodate this overhead plus your message data.

Security

The encryption implementation was created without formal cryptography experience, though I believe it is generally sound. I use AES-128-GCM with ChaCha8 CSPRNG generated nonces where reuse is theoretically possible after ~2^96 nonces. You probably shouldn’t put this into production.

Core Types

• Peer - A UDP endpoint that can send and receive encrypted messages
• Key - A 128-bit encryption key for securing communications

Errors

• CryptoError - Encryption/decryption failures
• InvalidKeyError - Invalid key format or length

Structs

CryptoError

Opaque error for encryption and decryption failures.

Key

A 128-bit encryption key for securing peer communications.

Peer

A UDP peer that can send and receive encrypted messages.

Enums

InvalidKeyError

Error returned when a key cannot be parsed or has an invalid format.

Functions

can_reconnect

Returns true if the I/O error indicates a reconnectable condition.

can_retry

Returns true if the I/O error indicates a retryable condition.

is_unspecified

Returns true if the address is unspecified (0.0.0.0 or ::).

to_unspecified

Returns an unspecified address with the same IP version as the input.