irc-connect 0.1.0

an abstraction over the kinds of connections useful for irc clients
Documentation 
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use std::sync::Arc;
use tokio_rustls::rustls::{
    self,
    client::danger::HandshakeSignatureValid,
    crypto::{verify_tls12_signature, verify_tls13_signature, CryptoProvider},
    pki_types::{CertificateDer, ServerName, UnixTime},
    DigitallySignedStruct,
};

/// mostly borrowed from rustls/examples/src/bin/tlsclient-mio.rs,
/// rustls seems quite insistent on making the process of disabling
/// certificate verification as obnoxious as possible...

#[derive(Debug)]
pub struct PhonyVerify(Arc<CryptoProvider>);

impl PhonyVerify {
    pub fn new(provider: Arc<CryptoProvider>) -> Arc<Self> {
        Arc::new(Self(provider))
    }
}

impl rustls::client::danger::ServerCertVerifier for PhonyVerify {
    fn verify_server_cert(
        &self,
        _end_entity: &CertificateDer<'_>,
        _intermediates: &[CertificateDer<'_>],
        _server_name: &ServerName<'_>,
        _ocsp: &[u8],
        _now: UnixTime,
    ) -> Result<rustls::client::danger::ServerCertVerified, rustls::Error> {
        Ok(rustls::client::danger::ServerCertVerified::assertion())
    }

    fn verify_tls12_signature(
        &self,
        message: &[u8],
        cert: &CertificateDer<'_>,
        dss: &DigitallySignedStruct,
    ) -> Result<HandshakeSignatureValid, rustls::Error> {
        verify_tls12_signature(
            message,
            cert,
            dss,
            &self.0.signature_verification_algorithms,
        )
    }

    fn verify_tls13_signature(
        &self,
        message: &[u8],
        cert: &CertificateDer<'_>,
        dss: &DigitallySignedStruct,
    ) -> Result<HandshakeSignatureValid, rustls::Error> {
        verify_tls13_signature(
            message,
            cert,
            dss,
            &self.0.signature_verification_algorithms,
        )
    }

    fn supported_verify_schemes(&self) -> Vec<rustls::SignatureScheme> {
        self.0.signature_verification_algorithms.supported_schemes()
    }
}