pub fn validate_content_encryption(
alg: &str,
) -> Result<SupportedContentEncryption, KipukaError>Expand description
Validate a content encryption algorithm string and map it to a supported variant.
Accepts OID strings or short names (e.g., "aes-256-gcm",
"2.16.840.1.101.3.4.1.46").
§Errors
Returns KipukaError::BadRequest if the algorithm is not recognised
or not permitted by policy.