Function ring::agreement::agree_ephemeral

pub fn agree_ephemeral<B: AsRef<[u8]>, R>(
    my_private_key: EphemeralPrivateKey,
    peer_public_key: &UnparsedPublicKey<B>,
    kdf: impl FnOnce(&[u8]) -> R,
) -> Result<R, Unspecified>

Performs a key agreement with an ephemeral private key and the given public key.

my_private_key is the ephemeral private key to use. Since it is moved, it will not be usable after calling agree_ephemeral, thus guaranteeing that the key is used for only one key agreement.

peer_public_key is the peer’s public key. agree_ephemeral will return Err(error_value) if it does not match my_private_key's algorithm/curve. agree_ephemeral verifies that it is encoded in the standard form for the algorithm and that the key is valid; see the algorithm’s documentation for details on how keys are to be encoded and what constitutes a valid key for that algorithm.

After the key agreement is done, agree_ephemeral calls kdf with the raw key material from the key agreement operation and then returns what kdf returns.