Module hash 

HashPlugin trait — the Rust-side counterpart of the hash v0 wire protocol.

Plugin authors implement this trait on their hash state type, then apply #[plugin_interface(name = "hash", version = 0)] to the impl block. The macro emits the eight canonical cfmp_hash_* FFI symbols, one per trait method.

Method → symbol mapping (see crates/confium-core/src/ffi/hash.rs for the loader-side wire types):

trait method	FFI symbol	purpose
HashPlugin::create_with_opts	cfmp_hash_create	construct a new instance
HashPlugin::output_size	cfmp_hash_output_size	output length in bytes
HashPlugin::block_size	cfmp_hash_block_size	internal block size in bytes
HashPlugin::update	cfmp_hash_update	absorb input bytes
HashPlugin::reset	cfmp_hash_reset	reset to initial state
HashPlugin::try_clone	cfmp_hash_clone	duplicate the state
HashPlugin::finalize	cfmp_hash_finalize	emit digest into caller buffer
Drop	cfmp_hash_destroy	reclaim the boxed state

Traits

HashPlugin

Trait implemented by hash plugins. The macro-generated cfmp_hash_create calls HashPlugin::create_with_opts; all other symbols dispatch through OpaqueHandle::<Self>::borrow_raw and the corresponding trait method.

Functions

create_simple

Trivial constructor entry point for plugin authors who don’t need opts. Wraps HashPlugin::create_with_opts with None.

default_block_size

Default block_size implementation for hash plugins that don’t have a meaningful block size. Returns 64, the common block size for SHA-2 family hashes.