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use libc::c_int;
use std::error;
use std::error::Error as StdError;
use std::fmt;
use std::io;
use crate::error::ErrorStack;
use crate::ssl::MidHandshakeSslStream;
use crate::x509::X509VerifyResult;
#[derive(Debug, Copy, Clone, PartialEq, Eq)]
pub struct ErrorCode(c_int);
impl ErrorCode {
pub const ZERO_RETURN: ErrorCode = ErrorCode(ffi::SSL_ERROR_ZERO_RETURN);
pub const WANT_READ: ErrorCode = ErrorCode(ffi::SSL_ERROR_WANT_READ);
pub const WANT_WRITE: ErrorCode = ErrorCode(ffi::SSL_ERROR_WANT_WRITE);
pub const SYSCALL: ErrorCode = ErrorCode(ffi::SSL_ERROR_SYSCALL);
pub const SSL: ErrorCode = ErrorCode(ffi::SSL_ERROR_SSL);
#[cfg(ossl111)]
pub const WANT_CLIENT_HELLO_CB: ErrorCode = ErrorCode(ffi::SSL_ERROR_WANT_CLIENT_HELLO_CB);
pub fn from_raw(raw: c_int) -> ErrorCode {
ErrorCode(raw)
}
#[allow(clippy::trivially_copy_pass_by_ref)]
pub fn as_raw(&self) -> c_int {
self.0
}
}
#[derive(Debug)]
pub(crate) enum InnerError {
Io(io::Error),
Ssl(ErrorStack),
}
#[derive(Debug)]
pub struct Error {
pub(crate) code: ErrorCode,
pub(crate) cause: Option<InnerError>,
}
impl Error {
pub fn code(&self) -> ErrorCode {
self.code
}
pub fn io_error(&self) -> Option<&io::Error> {
match self.cause {
Some(InnerError::Io(ref e)) => Some(e),
_ => None,
}
}
pub fn into_io_error(self) -> Result<io::Error, Error> {
match self.cause {
Some(InnerError::Io(e)) => Ok(e),
_ => Err(self),
}
}
pub fn ssl_error(&self) -> Option<&ErrorStack> {
match self.cause {
Some(InnerError::Ssl(ref e)) => Some(e),
_ => None,
}
}
}
impl From<ErrorStack> for Error {
fn from(e: ErrorStack) -> Error {
Error {
code: ErrorCode::SSL,
cause: Some(InnerError::Ssl(e)),
}
}
}
impl fmt::Display for Error {
fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result {
match self.code {
ErrorCode::ZERO_RETURN => fmt.write_str("the SSL session has been shut down"),
ErrorCode::WANT_READ => match self.io_error() {
Some(_) => fmt.write_str("a nonblocking read call would have blocked"),
None => fmt.write_str("the operation should be retried"),
},
ErrorCode::WANT_WRITE => match self.io_error() {
Some(_) => fmt.write_str("a nonblocking write call would have blocked"),
None => fmt.write_str("the operation should be retried"),
},
ErrorCode::SYSCALL => match self.io_error() {
Some(err) => write!(fmt, "{}", err),
None => fmt.write_str("unexpected EOF"),
},
ErrorCode::SSL => match self.ssl_error() {
Some(e) => write!(fmt, "{}", e),
None => fmt.write_str("OpenSSL error"),
},
ErrorCode(code) => write!(fmt, "unknown error code {}", code),
}
}
}
impl error::Error for Error {
fn source(&self) -> Option<&(dyn error::Error + 'static)> {
match self.cause {
Some(InnerError::Io(ref e)) => Some(e),
Some(InnerError::Ssl(ref e)) => Some(e),
None => None,
}
}
}
#[derive(Debug)]
pub enum HandshakeError<S> {
SetupFailure(ErrorStack),
Failure(MidHandshakeSslStream<S>),
WouldBlock(MidHandshakeSslStream<S>),
}
impl<S: fmt::Debug> StdError for HandshakeError<S> {
fn source(&self) -> Option<&(dyn StdError + 'static)> {
match *self {
HandshakeError::SetupFailure(ref e) => Some(e),
HandshakeError::Failure(ref s) | HandshakeError::WouldBlock(ref s) => Some(s.error()),
}
}
}
impl<S: fmt::Debug> fmt::Display for HandshakeError<S> {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
match *self {
HandshakeError::SetupFailure(ref e) => write!(f, "stream setup failed: {}", e)?,
HandshakeError::Failure(ref s) => {
write!(f, "the handshake failed: {}", s.error())?;
let verify = s.ssl().verify_result();
if verify != X509VerifyResult::OK {
write!(f, ": {}", verify)?;
}
}
HandshakeError::WouldBlock(ref s) => {
write!(f, "the handshake was interrupted: {}", s.error())?;
let verify = s.ssl().verify_result();
if verify != X509VerifyResult::OK {
write!(f, ": {}", verify)?;
}
}
}
Ok(())
}
}
impl<S> From<ErrorStack> for HandshakeError<S> {
fn from(e: ErrorStack) -> HandshakeError<S> {
HandshakeError::SetupFailure(e)
}
}