# pemData The original PEM bytes as supplied to [`init(pemRepresentation:)`](/documentation/OpenSSL/RSA/PublicKey/init(pemRepresentation:)). ``` var pemData: Data { get } ``` ## Return Value A `Data` containing the input PEM bytes in UTF-8. Suitable for publishing, fingerprinting (e.g. via [`hash(data:)`](/documentation/OpenSSL/SHA256/hash(data:))), and cross-process transport. ## Discussion Public-key PEM is not secret and may be logged, published in `.well-known/jwks.json` endpoints, or embedded in TLS certificate pinning lists. The bytes returned here are the UTF-8 encoding of the original input string verbatim — no re-serialization is performed, which preserves vendor annotations and whitespace around the SPKI frame. > Note: Because this is the literal input, two `PublicKey` > instances representing the same underlying key but parsed > from differently-formatted PEM strings will produce > different `pemData` values. If you need canonical equality, > normalize by round-tripping through a DER decoder first > — a future release will provide a canonical accessor.