This library is a slimmed down version of https://github.com/onur/acme-client into only a rust api and it also supports the Acmev2 protocol. It is currently a work in progress, but you should be able to use it to create certificates.

To compile on windows you will need openssl, here's an easy way to get it installed.

(example in Git Bash)

git clone https://github.com/microsoft/vcpkg
cd vcpkg
./bootstrap-vcpkg.sh
./vcpkg.exe install openssl
./vcpkg.exe install openssl:x64-windows-static
# Add OPENSSL_DIR=/vcpkg/path/installed/x64-windows-static
cargo build

#[tokio::main]
async fn main() -> Result<()> {
    let dir = Directory::lets_encrypt()
        .await?;

    let account = dir.account_registration()
        .pkey_from_file(path) // optional, you can provide one with pkey(), or leave this blank to create a new pkey.
        .register()
        .await?;


    let domain = "yourdomain.com";
    let domains = &[domain];
    
    let order = account
        .create_order(&domain)
        .await
        .expect("create order");

    for chal in order.get_http_challenges() {
        chal.serve_challenge(Duration::from_seconds(30)); // create a temp webserver on port 80 for 30 seconds
        chal.validate(&account).await.expect("to validate");    
    }
    // use order.get_dns_challanges to do dns.

    let signer = account.certificate_signer(&domains);

    let cert = signer.sign_certificate(&order).await.expect("to sign certificate");

    cert.save_signed_certificate(format!("certs/{}.pem", domain_name)).await?;
    cert.save_private_key(format!("certs/{}.key", domain_name)).await?;
}

• Cert Revocation
• Key change
• Examples

Thanks to people who are contributing to this effort:

• @lucacasonato