Crate noah_x25519_dalek

x25519-dalek

A pure-Rust implementation of x25519 elliptic curve Diffie-Hellman key exchange, with curve operations provided by curve25519-dalek.

Structs

EphemeralSecret

A short-lived Diffie-Hellman secret key that can only be used to compute a single SharedSecret.

PublicKey

A Diffie-Hellman public key, corresponding to an EphemeralSecret or StaticSecret key.

ReusableSecret

A Diffie-Hellman secret key which may be used more than once, but is purposefully not serialiseable in order to discourage key-reuse. This is implemented to facilitate protocols such as Noise (e.g. Noise IK key usage, etc.) and X3DH which require an “ephemeral” key to conduct the Diffie-Hellman operation multiple times throughout the protocol, while the protocol run at a higher level is only conducted once per key.

SharedSecret

The result of a Diffie-Hellman key exchange.

StaticSecret

A Diffie-Hellman secret key that can be used to compute multiple SharedSecrets.

Constants

X25519_BASEPOINT_BYTES

The X25519 basepoint, for use with the bare, byte-oriented x25519 function. This is provided for people who cannot use the typed DH API for some reason.

Functions

x25519

The bare, byte-oriented x25519 function, exactly as specified in RFC7748.