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macro_rules! bail {
($e:expr) => {
return Err(($e).into());
};
}
#[allow(missing_docs)]
#[derive(Fail, Debug)]
pub enum SnowError {
#[fail(display = "pattern failed to parse: {:?}", reason)]
Pattern { reason: PatternProblem },
#[fail(display = "initialization failed at {:?}", reason)]
Init { reason: InitStage },
#[fail(display = "missing prerequisite: {:?}", reason)]
Prereq { reason: Prerequisite },
#[fail(display = "state error of type: {:?}", reason)]
State { reason: StateProblem },
#[fail(display = "invalid input")]
Input,
#[fail(display = "dh failed")]
Dh,
#[fail(display = "decryption failed")]
Decrypt,
}
#[allow(missing_docs)]
#[derive(Debug)]
pub enum PatternProblem {
TooFewParameters,
UnsupportedHandshakeType,
UnsupportedBaseType,
UnsupportedHashType,
UnsupportedDhType,
UnsupportedCipherType,
InvalidPsk,
UnsupportedModifier,
}
impl From<PatternProblem> for SnowError {
fn from(reason: PatternProblem) -> Self {
SnowError::Pattern { reason }
}
}
#[allow(missing_docs)]
#[derive(Debug)]
pub enum InitStage {
ValidateKeyLengths,
ValidatePskLengths,
ValidateCipherTypes,
GetRngImpl,
GetDhImpl,
GetCipherImpl,
GetHashImpl,
ValidatePskPosition,
}
impl From<InitStage> for SnowError {
fn from(reason: InitStage) -> Self {
SnowError::Init { reason }
}
}
#[allow(missing_docs)]
#[derive(Debug)]
pub enum Prerequisite {
LocalPrivateKey,
RemotePublicKey,
}
impl From<Prerequisite> for SnowError {
fn from(reason: Prerequisite) -> Self {
SnowError::Prereq { reason }
}
}
#[allow(missing_docs)]
#[derive(Debug)]
pub enum StateProblem {
MissingKeyMaterial,
MissingPsk,
NotTurnToWrite,
NotTurnToRead,
HandshakeNotFinished,
HandshakeAlreadyFinished,
OneWay,
StatelessTransportMode,
}
impl From<StateProblem> for SnowError {
fn from(reason: StateProblem) -> Self {
SnowError::State { reason }
}
}