AzelusLightvale-ComfyUI-ARG-Toolkit/web/docs/ConcatKDFHash_Derive.md

ConcatKDF (Hash) Key Derivation

Derives a key using the Concatenation Key Derivation Function with a standard hash.

Source library: cryptography

Overview

This node implements the Concatenation Key Derivation Function from NIST SP 800-56A. The function works by hashing the concatenation of a counter, the input keying material, and optional context-specific information.

This KDF is suitable for deriving keys from a shared secret, but it is not intended for hashing passwords.

Parameters

• message: The input keying material (e.g., a shared secret) as a BYTESLIKE object.
• length: The desired length of the derived key in bytes.
• algorithm: The hash function to use (e.g., SHA256).
• other_info: (Optional) Application-specific context information as a BYTESLIKE object. This can be used to bind the derived key to a specific purpose or context.

Outputs

• derived_key: The resulting derived key as a BYTESLIKE object.