INNER CODE UNIT · Rust

create_key

matrix-org/vodozemac · src/ecies/mod.rs:345

    fn create_key(info: &str, shared_secret: &SharedSecret) -> Box<[u8; 32]> {
        let mut key = Box::new([0u8; 32]);
        let kdf: Hkdf<Sha512> = Hkdf::new(None, shared_secret.as_bytes());

        #[allow(clippy::expect_used)]
        kdf.expand(info.as_bytes(), key.as_mut_slice()).expect(
            "We should be able to expand the 32-byte long shared secret into a 32 byte key.",
        );

        key
    }

    /// Create the encryption key for messages we send into the channel.
    fn create_encryption_key(
        shared_secret: &SharedSecret,
        our_public_key: Curve25519PublicKey,
        their_public_key: Curve25519PublicKey,
        app_info: &str,

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