rustls-acme 0.15.2

TLS certificate management and serving using rustls
Documentation 
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use crate::crypto::digest::{Context, SHA256};
use crate::{AccountCache, CertCache};
use async_trait::async_trait;
use base64::prelude::*;
use blocking::unblock;
use std::io::ErrorKind;
use std::path::Path;

pub struct DirCache<P: AsRef<Path> + Send + Sync> {
    inner: P,
}

impl<P: AsRef<Path> + Send + Sync> DirCache<P> {
    pub fn new(dir: P) -> Self {
        Self { inner: dir }
    }
    async fn read_if_exist(&self, file: impl AsRef<Path>) -> Result<Option<Vec<u8>>, std::io::Error> {
        let path = self.inner.as_ref().join(file);
        match unblock(move || std::fs::read(&path)).await {
            Ok(content) => Ok(Some(content)),
            Err(err) => match err.kind() {
                ErrorKind::NotFound => Ok(None),
                _ => Err(err),
            },
        }
    }
    async fn write(&self, file: impl AsRef<Path>, contents: impl AsRef<[u8]>) -> Result<(), std::io::Error> {
        let path = self.inner.as_ref().to_owned();
        unblock(move || std::fs::create_dir_all(&path)).await?;
        let path = self.inner.as_ref().join(file);
        let contents = contents.as_ref().to_owned();
        unblock(move || std::fs::write(path, contents)).await
    }
    fn cached_account_file_name(contact: &[String], directory_url: impl AsRef<str>) -> String {
        let mut ctx = Context::new(&SHA256);
        for el in contact {
            ctx.update(el.as_ref());
            ctx.update(&[0])
        }
        ctx.update(directory_url.as_ref().as_bytes());
        let hash = BASE64_URL_SAFE_NO_PAD.encode(ctx.finish());
        format!("cached_account_{hash}")
    }
    fn cached_cert_file_name(domains: &[String], directory_url: impl AsRef<str>) -> String {
        let mut ctx = Context::new(&SHA256);
        for domain in domains {
            ctx.update(domain.as_ref());
            ctx.update(&[0])
        }
        ctx.update(directory_url.as_ref().as_bytes());
        let hash = BASE64_URL_SAFE_NO_PAD.encode(ctx.finish());
        format!("cached_cert_{hash}")
    }
}

#[async_trait]
impl<P: AsRef<Path> + Send + Sync> CertCache for DirCache<P> {
    type EC = std::io::Error;
    async fn load_cert(&self, domains: &[String], directory_url: &str) -> Result<Option<Vec<u8>>, Self::EC> {
        let file_name = Self::cached_cert_file_name(domains, directory_url);
        self.read_if_exist(file_name).await
    }
    async fn store_cert(&self, domains: &[String], directory_url: &str, cert: &[u8]) -> Result<(), Self::EC> {
        let file_name = Self::cached_cert_file_name(domains, directory_url);
        self.write(file_name, cert).await
    }
}

#[async_trait]
impl<P: AsRef<Path> + Send + Sync> AccountCache for DirCache<P> {
    type EA = std::io::Error;
    async fn load_account(&self, contact: &[String], directory_url: &str) -> Result<Option<Vec<u8>>, Self::EA> {
        let file_name = Self::cached_account_file_name(contact, directory_url);
        self.read_if_exist(file_name).await
    }

    async fn store_account(&self, contact: &[String], directory_url: &str, account: &[u8]) -> Result<(), Self::EA> {
        let file_name = Self::cached_account_file_name(contact, directory_url);
        self.write(file_name, account).await
    }
}