Module sodoken::kdf

Api functions related to cryptographically secure key derivation.

Example Key Derivation

let parent_key = [0; 32];
let sub_key = sodoken::BufWrite::new_no_lock(32);
sodoken::kdf::derive_from_key(
    sub_key.clone(),
    42,           // index
    *b"CtxBytes", // context
    parent_key,
).unwrap();
assert_eq!(&[236, 60, 149, 214], &sub_key.read_lock()[..4]);

Constants

• CONTEXTBYTES
  Byte length of kdf “context” parameter.
• KEYBYTES
  Byte length of kdf “parent” key.

Functions

• derive_from_key
  Derive a subkey from a parent key.