pub struct DerivableSecret {
pub(crate) level: usize,
pub(crate) kdf: Hkdf<Sha512>,
}
Expand description
A secret that can have child-subkey derived from it.
Fields§
§level: usize
Derivation level, root = 0, every child_key
increments it
kdf: Hkdf<Sha512>
An instance of the HKDF (Hash-based Key Derivation Function) with SHA-512 as the underlying hash function. It is used to derive child keys.
Implementations§
source§impl DerivableSecret
impl DerivableSecret
sourcepub fn new_root(root_key: &[u8], salt: &[u8]) -> Self
pub fn new_root(root_key: &[u8], salt: &[u8]) -> Self
Derive root secret key from a secret material and salt.
The salt
is just additional data t used
as an additional input to the HKDF.
sourcepub fn level(&self) -> usize
pub fn level(&self) -> usize
Get derivation level
This is useful for ensuring a correct derivation level is used, in various places.
Root keys start at 0
, and every derived key increments it.
pub fn child_key(&self, cid: ChildId) -> DerivableSecret
sourcepub fn federation_key(&self, federation_id: &FederationId) -> DerivableSecret
pub fn federation_key(&self, federation_id: &FederationId) -> DerivableSecret
Derive a federation-ID-based child key from self.
This is useful to ensure that the same root secret is not reused
across multiple fedimint-client
instances for different federations.
We reset the level to 0 here since fedimint-client
expects its root
secret to be at that level.
sourcepub fn to_secp_key<C: Signing>(self, ctx: &Secp256k1<C>) -> KeyPair
pub fn to_secp_key<C: Signing>(self, ctx: &Secp256k1<C>) -> KeyPair
secp256k1 keys are used for bitcoin deposit addresses, redeem keys and contract keys for lightning.
sourcepub fn to_bls12_381_key(&self) -> Scalar
pub fn to_bls12_381_key(&self) -> Scalar
bls12-381 keys are used for the guardians’ threshold signature scheme, and most importantly for its use for the blinding keys for e-cash notes.
pub fn to_chacha20_poly1305_key_raw(&self) -> [u8; 32]
pub fn to_chacha20_poly1305_key(&self) -> UnboundKey
sourcepub fn to_random_bytes<const LEN: usize>(&self) -> [u8; LEN]
pub fn to_random_bytes<const LEN: usize>(&self) -> [u8; LEN]
Generate a pseudo-random byte array from the derivable secret.
Trait Implementations§
source§impl Clone for DerivableSecret
impl Clone for DerivableSecret
source§fn clone(&self) -> DerivableSecret
fn clone(&self) -> DerivableSecret
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moreAuto Trait Implementations§
impl Freeze for DerivableSecret
impl RefUnwindSafe for DerivableSecret
impl Send for DerivableSecret
impl Sync for DerivableSecret
impl Unpin for DerivableSecret
impl UnwindSafe for DerivableSecret
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