webauthn-authenticator-rs 0.5.2

Webauthn Authenticator Client Library
Documentation 
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#[cfg(feature = "crypto")]
mod crypto {
    pub fn test_openssl() {
        use std::env;

        const OPENSSL_DOC: &str = "https://github.com/kanidm/webauthn-rs/blob/master/OpenSSL.md";

        println!();
        if let Ok(v) = env::var("DEP_OPENSSL_VERSION_NUMBER") {
            let version =
                u64::from_str_radix(&v, 16).expect("Failed to parse OpenSSL version in build.rs");

            #[allow(clippy::unusual_byte_groupings)]
            if version >= 0x3_00_00_00_0 {
                return;
            } else {
                println!(
                    r#"
Your version of OpenSSL is out of date, and not supported by this library.

Please upgrade to OpenSSL v3.0.0 or later.

More info: {OPENSSL_DOC}
OpenSSL version string: {version}
"#
                );
                panic!("The installed version of OpenSSL is unusable.");
            }
        }

        panic!("No version of OpenSSL is found.");
    }
}

fn main() {
    #[cfg(feature = "crypto")]
    crypto::test_openssl();
}