Function _test_decode_cert

crates/stdlib/src/ssl.rs:4913–4941

(path: PyUtf8StrRef, vm: &VirtualMachine)

    /// file reading and PEM/DER auto-detection. Used by test suite.
    #[pyfunction]
    fn _test_decode_cert(path: PyUtf8StrRef, vm: &VirtualMachine) -> PyResult<PyObjectRef> {
        // Read certificate file
        let path_str = path.as_str();
        let cert_data = std::fs::read(path_str).map_err(|e| {
            vm.new_os_error(format!(
                "Failed to read certificate file {}: {}",
                path_str, e
            ))
        })?;

        // Auto-detect PEM vs DER format
        let cert_der = if cert_data
            .windows(27)
            .any(|w| w == b"-----BEGIN CERTIFICATE-----")
        {
            // Parse PEM format
            let mut cursor = std::io::Cursor::new(&cert_data);
            rustls_pemfile::certs(&mut cursor)
                .find_map(|r| r.ok())
                .ok_or_else(|| vm.new_value_error("No valid certificate found in PEM file"))?
                .to_vec()
        } else {
            // Assume DER format
            cert_data
        };

        // Reuse the comprehensive helper function
        cert::cert_der_to_dict_helper(vm, &cert_der)
    }

    #[pyfunction]
    fn DER_cert_to_PEM_cert(der_cert: ArgBytesLike, vm: &VirtualMachine) -> PyResult<PyStrRef> {