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use crate::common::Identity;
use crate::common::scram::DeriveError;
use crate::secret::Secret;
use std::fmt;
#[macro_export]
macro_rules! impl_validator_using_provider {
( $validator:ty, $secret:ty ) => {
impl $crate::server::Validator<$secret> for $validator {
fn validate(&self, identity: &$crate::common::Identity
, value: &$secret) -> Result<(), ValidatorError> {
if &(self as &$crate::server::Provider<$secret>).provide(identity)? == value {
Ok(())
}
else {
Err(ValidatorError::AuthenticationFailed)
}
}
}
}
}
pub trait Provider<S: Secret>: Validator<S> {
fn provide(&self, identity: &Identity) -> Result<S, ProviderError>;
}
pub trait Validator<S: Secret> {
fn validate(&self, identity: &Identity, value: &S) -> Result<(), ValidatorError>;
}
#[derive(Debug, PartialEq)]
pub enum ProviderError {
AuthenticationFailed,
DeriveError(DeriveError),
}
#[derive(Debug, PartialEq)]
pub enum ValidatorError {
AuthenticationFailed,
ProviderError(ProviderError),
}
#[derive(Debug, PartialEq)]
pub enum MechanismError {
NoUsernameSpecified,
ErrorDecodingUsername,
NoPasswordSpecified,
ErrorDecodingPassword,
ValidatorError(ValidatorError),
FailedToDecodeMessage,
ChannelBindingNotSupported,
ChannelBindingIsSupported,
ChannelBindingMechanismIncorrect,
CannotDecodeInitialMessage,
NoUsername,
NoNonce,
FailedToGenerateNonce,
ProviderError(ProviderError),
CannotDecodeResponse,
InvalidKeyLength(hmac::crypto_mac::InvalidKeyLength),
NoProof,
CannotDecodeProof,
AuthenticationFailed,
SaslSessionAlreadyOver,
}
impl From<DeriveError> for ProviderError {
fn from(err: DeriveError) -> ProviderError {
ProviderError::DeriveError(err)
}
}
impl From<ProviderError> for ValidatorError {
fn from(err: ProviderError) -> ValidatorError {
ValidatorError::ProviderError(err)
}
}
impl From<ProviderError> for MechanismError {
fn from(err: ProviderError) -> MechanismError {
MechanismError::ProviderError(err)
}
}
impl From<ValidatorError> for MechanismError {
fn from(err: ValidatorError) -> MechanismError {
MechanismError::ValidatorError(err)
}
}
impl From<hmac::crypto_mac::InvalidKeyLength> for MechanismError {
fn from(err: hmac::crypto_mac::InvalidKeyLength) -> MechanismError {
MechanismError::InvalidKeyLength(err)
}
}
impl fmt::Display for ProviderError {
fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
write!(fmt, "provider error")
}
}
impl fmt::Display for ValidatorError {
fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
write!(fmt, "validator error")
}
}
impl fmt::Display for MechanismError {
fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
match self {
MechanismError::NoUsernameSpecified => write!(fmt, "no username specified"),
MechanismError::ErrorDecodingUsername => write!(fmt, "error decoding username"),
MechanismError::NoPasswordSpecified => write!(fmt, "no password specified"),
MechanismError::ErrorDecodingPassword => write!(fmt, "error decoding password"),
MechanismError::ValidatorError(err) => write!(fmt, "validator error: {}", err),
MechanismError::FailedToDecodeMessage => write!(fmt, "failed to decode message"),
MechanismError::ChannelBindingNotSupported => write!(fmt, "channel binding not supported"),
MechanismError::ChannelBindingIsSupported => write!(fmt, "channel binding is supported"),
MechanismError::ChannelBindingMechanismIncorrect => write!(fmt, "channel binding mechanism is incorrect"),
MechanismError::CannotDecodeInitialMessage => write!(fmt, "can’t decode initial message"),
MechanismError::NoUsername => write!(fmt, "no username"),
MechanismError::NoNonce => write!(fmt, "no nonce"),
MechanismError::FailedToGenerateNonce => write!(fmt, "failed to generate nonce"),
MechanismError::ProviderError(err) => write!(fmt, "provider error: {}", err),
MechanismError::CannotDecodeResponse => write!(fmt, "can’t decode response"),
MechanismError::InvalidKeyLength(err) => write!(fmt, "invalid key length: {}", err),
MechanismError::NoProof => write!(fmt, "no proof"),
MechanismError::CannotDecodeProof => write!(fmt, "can’t decode proof"),
MechanismError::AuthenticationFailed => write!(fmt, "authentication failed"),
MechanismError::SaslSessionAlreadyOver => write!(fmt, "SASL session already over"),
}
}
}
impl Error for ProviderError {}
impl Error for ValidatorError {}
use std::error::Error;
impl Error for MechanismError {
fn source(&self) -> Option<&(dyn Error + 'static)> {
match self {
MechanismError::ValidatorError(err) => Some(err),
MechanismError::ProviderError(err) => Some(err),
_ => None,
}
}
}
pub trait Mechanism {
fn name(&self) -> &str;
fn respond(&mut self, payload: &[u8]) -> Result<Response, MechanismError>;
}
#[derive(Debug, Clone, PartialEq, Eq)]
pub enum Response {
Success(Identity, Vec<u8>),
Proceed(Vec<u8>),
}
pub mod mechanisms;