Calculates an artifact's SHA256 checksum and attaches it as a property (with key "sha256"). If the artifact is a folder, then recursively calculates the SHA256 of each item in the folder and attaches the property to each item. Since: 4.2.1 Security: Requires an admin user Note: Artifactory natively supports SHA-256 since version 5.5. This API has been maintained to provide backward compatibility for users of older Artifactory versions.