pub struct PreparedKey { /* private fields */ }Expand description
Single-use secret cache. Signing consumes this object before returning data.
It is not Clone on purpose: a copy would be a second chance to sign
with the same one-time key. Dropping it zeroizes the secret parts.
Implementations§
Source§impl PreparedKey
impl PreparedKey
Sourcepub fn from_seed(seed: [u8; 32]) -> Self
pub fn from_seed(seed: [u8; 32]) -> Self
Prepare a fresh key from an exclusively allocated random 256-bit seed.
The seed must never be reused, including across resets or processes. The four-byte salt prefixes retain the upstream x86 little-endian convention. The signature checksum and certificate format do not.
Steps: derive two 16-byte salts from the seed, expand the seed into 68 secret chain starts, hash each chain three steps forward, then commit to the public salt and the 68 endpoints.
Sourcepub const fn public(&self) -> KeyPublic
pub const fn public(&self) -> KeyPublic
Public metadata to send through the authenticated key-admission plane.
Sourcepub const fn signing_nonce_for_device(&self) -> Nonce
pub const fn signing_nonce_for_device(&self) -> Nonce
Signer-private message nonce for the trusted hardware loader only.
Do not distribute this with pre-certified public keys. It must remain unpredictable until the one-time key is irreversibly bound to a message; early disclosure weakens the 128-bit salted-digest chosen-message model.
Sourcepub const fn cache_for_device(&self) -> &ChainCache
pub const fn cache_for_device(&self) -> &ChainCache
Borrow secret cache bytes for trusted device loading. Never log them.
Sourcepub fn sign(self, message: &[u8]) -> WotsSignature
pub fn sign(self, message: &[u8]) -> WotsSignature
Consume this key and reveal only message-selected nodes.
Takes self by value, so this key cannot sign again. For chain i
with digit d, the revealed node is nodes[d][i].
Trait Implementations§
Auto Trait Implementations§
impl Freeze for PreparedKey
impl RefUnwindSafe for PreparedKey
impl Send for PreparedKey
impl Sync for PreparedKey
impl Unpin for PreparedKey
impl UnsafeUnpin for PreparedKey
impl UnwindSafe for PreparedKey
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