121 lines
3.8 KiB
Rust
121 lines
3.8 KiB
Rust
use std::any::Any;
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use std::error;
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use std::error::Error as StdError;
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use std::fmt;
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use std::io;
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use error::ErrorStack;
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use ssl::MidHandshakeSslStream;
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/// An SSL error.
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#[derive(Debug)]
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pub enum Error {
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/// The SSL session has been closed by the other end
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ZeroReturn,
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/// An attempt to read data from the underlying socket returned
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/// `WouldBlock`. Wait for read readiness and reattempt the operation.
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WantRead(io::Error),
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/// An attempt to write data from the underlying socket returned
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/// `WouldBlock`. Wait for write readiness and reattempt the operation.
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WantWrite(io::Error),
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/// The client certificate callback requested to be called again.
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WantX509Lookup,
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/// An error reported by the underlying stream.
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Stream(io::Error),
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/// An error in the OpenSSL library.
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Ssl(ErrorStack),
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}
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impl fmt::Display for Error {
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fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
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try!(fmt.write_str(self.description()));
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if let Some(err) = self.cause() {
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write!(fmt, ": {}", err)
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} else {
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Ok(())
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}
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}
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}
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impl error::Error for Error {
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fn description(&self) -> &str {
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match *self {
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Error::ZeroReturn => "The SSL session was closed by the other end",
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Error::WantRead(_) => "A read attempt returned a `WouldBlock` error",
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Error::WantWrite(_) => "A write attempt returned a `WouldBlock` error",
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Error::WantX509Lookup => "The client certificate callback requested to be called again",
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Error::Stream(_) => "The underlying stream reported an error",
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Error::Ssl(_) => "The OpenSSL library reported an error",
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}
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}
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fn cause(&self) -> Option<&error::Error> {
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match *self {
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Error::WantRead(ref err) => Some(err),
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Error::WantWrite(ref err) => Some(err),
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Error::Stream(ref err) => Some(err),
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Error::Ssl(ref err) => Some(err),
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_ => None,
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}
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}
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}
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impl From<ErrorStack> for Error {
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fn from(e: ErrorStack) -> Error {
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Error::Ssl(e)
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}
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}
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/// An error or intermediate state after a TLS handshake attempt.
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#[derive(Debug)]
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pub enum HandshakeError<S> {
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/// Setup failed.
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SetupFailure(ErrorStack),
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/// The handshake failed.
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Failure(MidHandshakeSslStream<S>),
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/// The handshake was interrupted midway through. This error will never be returned for blocking streams.
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// FIXME change to WouldBlock
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Interrupted(MidHandshakeSslStream<S>),
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}
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impl<S: Any + fmt::Debug> StdError for HandshakeError<S> {
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fn description(&self) -> &str {
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match *self {
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HandshakeError::SetupFailure(_) => "stream setup failed",
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HandshakeError::Failure(_) => "the handshake failed",
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HandshakeError::Interrupted(_) => "the handshake was interrupted",
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}
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}
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fn cause(&self) -> Option<&StdError> {
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match *self {
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HandshakeError::SetupFailure(ref e) => Some(e),
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HandshakeError::Failure(ref s) |
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HandshakeError::Interrupted(ref s) => Some(s.error()),
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}
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}
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}
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impl<S: Any + fmt::Debug> fmt::Display for HandshakeError<S> {
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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try!(f.write_str(StdError::description(self)));
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match *self {
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HandshakeError::SetupFailure(ref e) => try!(write!(f, ": {}", e)),
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HandshakeError::Failure(ref s) |
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HandshakeError::Interrupted(ref s) => {
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try!(write!(f, ": {}", s.error()));
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if let Some(err) = s.ssl().verify_result() {
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try!(write!(f, ": {}", err));
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}
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}
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}
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Ok(())
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}
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}
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impl<S> From<ErrorStack> for HandshakeError<S> {
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fn from(e: ErrorStack) -> HandshakeError<S> {
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HandshakeError::SetupFailure(e)
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}
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}
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