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use super::super::types::KeyPair;
use std::error::Error;
use std::fmt;
/* 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,
InvalidMac1,
RateLimited,
InitiationFlood,
}
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"),
HandshakeError::InvalidMac1 => write!(f, "Message has invalid mac1 field"),
HandshakeError::RateLimited => write!(f, "Message was dropped by rate limiter"),
HandshakeError::InitiationFlood => {
write!(f, "Message was dropped because of initiation flood")
}
}
}
}
impl Error for HandshakeError {
fn description(&self) -> &str {
"Generic Handshake Error"
}
fn source(&self) -> Option<&(dyn Error + 'static)> {
None
}
}
pub type Output<'a, O> = (
Option<&'a O>, // external identifier associated with peer
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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