Function pem_encode

nodedb/src/control/cluster/pem_io.rs:16–31

PEM-encode a DER blob under the given label. The output uses the canonical 64-char line wrapping (matches `openssl` output).

(label: &str, der: &[u8])

/// PEM-encode a DER blob under the given label. The output uses the
/// canonical 64-char line wrapping (matches `openssl` output).
pub fn pem_encode(label: &str, der: &[u8]) -> String {
    use base64::Engine;
    let b64 = base64::engine::general_purpose::STANDARD.encode(der);
    let mut out = String::with_capacity(b64.len() + 64);
    out.push_str("-----BEGIN ");
    out.push_str(label);
    out.push_str("-----\n");
    for chunk in b64.as_bytes().chunks(64) {
        out.push_str(std::str::from_utf8(chunk).expect("base64 is ascii"));
        out.push('\n');
    }
    out.push_str("-----END ");
    out.push_str(label);
    out.push_str("-----\n");
    out
}

/// Write a DER certificate as a PEM-encoded `CERTIFICATE` block.
///