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use std::error::Error;
use std::fmt;
use crate::types::KeyPair;
/* Internal types for the noise IKpsk2 implementation */
// config error
#[derive(Debug)]
pub struct ConfigError(String);
impl ConfigError {
pub fn new(s: &str) -> Self {
ConfigError(s.to_string())
}
}
impl fmt::Display for ConfigError {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
write!(f, "ConfigError({})", self.0)
}
}
impl Error for ConfigError {
fn description(&self) -> &str {
&self.0
}
fn source(&self) -> Option<&(dyn Error + 'static)> {
None
}
}
// handshake error
#[derive(Debug)]
pub enum HandshakeError {
DecryptionFailure,
UnknownPublicKey,
UnknownReceiverId,
InvalidMessageFormat,
OldTimestamp,
InvalidState,
}
impl fmt::Display for HandshakeError {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
match self {
HandshakeError::DecryptionFailure => write!(f, "Failed to AEAD:OPEN"),
HandshakeError::UnknownPublicKey => write!(f, "Unknown public key"),
HandshakeError::UnknownReceiverId => {
write!(f, "Receiver id not allocated to any handshake")
}
HandshakeError::InvalidMessageFormat => write!(f, "Invalid handshake message format"),
HandshakeError::OldTimestamp => write!(f, "Timestamp is less/equal to the newest"),
HandshakeError::InvalidState => write!(f, "Message does not apply to handshake state"),
}
}
}
impl Error for HandshakeError {
fn description(&self) -> &str {
"Generic Handshake Error"
}
fn source(&self) -> Option<&(dyn Error + 'static)> {
None
}
}
pub type Output<T> = (
T, // external identifier associated with peer
// (e.g. a reference or vector index)
Option<Vec<u8>>, // message to send
Option<KeyPair>, // resulting key-pair of successful handshake
);
// preshared key
pub type Psk = [u8; 32];
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