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#![cfg_attr(feature = "docs", feature(doc_cfg))]
#![warn(missing_docs)]
#![warn(missing_debug_implementations, rust_2018_idioms)]
#![doc(test(attr(deny(rust_2018_idioms, warnings))))]
#![doc(test(attr(allow(unused_extern_crates, unused_variables))))]
#[macro_use]
extern crate log;
#[cfg(all(feature = "io-tokio", feature = "io-async-std"))]
compile_error!("only one of 'async-std' or 'async-tokio' features must be enabled");
#[cfg(any(feature = "io-tokio", feature = "io-async-std"))]
#[cfg_attr(feature = "docs", doc(cfg(any(feature = "io-tokio", feature = "io-async-std"))))]
pub mod async_io;
pub mod sync_io;
mod certificate;
mod error;
mod identity;
pub use certificate::Certificate;
pub use error::{Error, HandshakeError};
pub use identity::Identity;
use openssl::{error::ErrorStack, ssl::SslContextBuilder};
use std::result;
pub type Result<T> = result::Result<T, Error>;
#[derive(Debug, Copy, Clone)]
pub enum Protocol {
Sslv3,
Tlsv10,
Tlsv11,
Tlsv12,
#[doc(hidden)]
__NonExhaustive,
}
#[cfg(have_min_max_version)]
fn supported_protocols(
min: Option<Protocol>,
max: Option<Protocol>,
ctx: &mut SslContextBuilder,
) -> std::result::Result<(), ErrorStack> {
use openssl::ssl::SslVersion;
fn cvt(p: Protocol) -> SslVersion {
match p {
Protocol::Sslv3 => SslVersion::SSL3,
Protocol::Tlsv10 => SslVersion::TLS1,
Protocol::Tlsv11 => SslVersion::TLS1_1,
Protocol::Tlsv12 => SslVersion::TLS1_2,
Protocol::__NonExhaustive => unreachable!(),
}
}
ctx.set_min_proto_version(min.map(cvt))?;
ctx.set_max_proto_version(max.map(cvt))?;
Ok(())
}
#[cfg(not(have_min_max_version))]
fn supported_protocols(
min: Option<Protocol>,
max: Option<Protocol>,
ctx: &mut SslContextBuilder,
) -> std::result::Result<(), ErrorStack> {
use openssl::ssl::SslOptions;
let no_ssl_mask = SslOptions::NO_SSLV2
| SslOptions::NO_SSLV3
| SslOptions::NO_TLSV1
| SslOptions::NO_TLSV1_1
| SslOptions::NO_TLSV1_2;
ctx.clear_options(no_ssl_mask);
let mut options = SslOptions::empty();
options |= match min {
None => SslOptions::empty(),
Some(Protocol::Sslv3) => SslOptions::NO_SSLV2,
Some(Protocol::Tlsv10) => SslOptions::NO_SSLV2 | SslOptions::NO_SSLV3,
Some(Protocol::Tlsv11) => SslOptions::NO_SSLV2 | SslOptions::NO_SSLV3 | SslOptions::NO_TLSV1,
Some(Protocol::Tlsv12) => {
SslOptions::NO_SSLV2 | SslOptions::NO_SSLV3 | SslOptions::NO_TLSV1 | SslOptions::NO_TLSV1_1
}
Some(Protocol::__NonExhaustive) => unreachable!(),
};
options |= match max {
None | Some(Protocol::Tlsv12) => SslOptions::empty(),
Some(Protocol::Tlsv11) => SslOptions::NO_TLSV1_2,
Some(Protocol::Tlsv10) => SslOptions::NO_TLSV1_1 | SslOptions::NO_TLSV1_2,
Some(Protocol::Sslv3) => SslOptions::NO_TLSV1 | SslOptions::NO_TLSV1_1 | SslOptions::NO_TLSV1_2,
Some(Protocol::__NonExhaustive) => unreachable!(),
};
ctx.set_options(options);
Ok(())
}