xwt-cert-utils 0.1.0

Useful utils for working with certificates, provided by and for xwt. Not directly required to use xwt, but can be helpful. Also usable without xwt. Inteded to work with both wasm and native.
Documentation 
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//! Fingerprint computation.

/// RFC7469 fingerprint.
#[cfg(feature = "fingerprint-rfc7469")]
pub fn rfc7469(cert: &rcgen::Certificate) -> String {
    use base64::{engine::general_purpose::STANDARD as Base64Engine, Engine};

    let digest = crate::digest::sha256(&cert.get_key_pair().public_key_der());
    Base64Engine.encode(digest)
}

/// SHA256 fingerprint.
///
/// Note for someone who wants to verify the output, it should be similar to
/// the output for the following command:
/// ```shell
/// openssl x509 -noout -fingerprint -sha256 -in certificate.pem
/// ```
#[cfg(feature = "fingerprint-sha256")]
pub fn sha256(cert_der: &[u8]) -> String {
    let digest = crate::digest::sha256(cert_der);
    let digest: &[u8] = digest.as_ref();

    digest
        .iter()
        .map(|byte| format!("{:02X}", byte))
        .collect::<Vec<_>>()
        .join(":")
}