Struct KeyRotation 

pub struct KeyRotation {
    pub agora_governance_key_rotation: u32,
    pub reason: RotationReason,
    pub old_key: PublicKeyHex,
    pub new_key: PublicKeyHex,
    pub proof: SignatureHex,
    pub proof_signed_at: i64,
    pub certificate: KeyCertificate,
    pub outgoing_certificate: Option<KeyCertificate>,
}

The data of a key_rotation entry.

Build one with routine or compromise: both compute the proof of possession. The certificate is what authenticates the change; the proof only shows the certified key is one somebody holds.

No free text, and unknown fields are refused: a rotation can never be redacted, so it carries nothing anyone could need erased. Narrative belongs in a separate, redactable entry.

Fields

agora_governance_key_rotation: u32

Always KEY_ROTATION_VERSION

reason: RotationReason

old_key: PublicKeyHex

new_key: PublicKeyHex

proof: SignatureHex

crypto::sign(new_key, RotationStatement::hash , proof_signed_at) — the new key signing for itself, at one position in one chain

proof_signed_at: i64

Unix seconds; what the proof signature covers

certificate: KeyCertificate

The root’s word that new_key holds the chain from here. For a compromise its statement also names the last entry trusted under old_key.

outgoing_certificate: Option<KeyCertificate>

The CertPurpose::Genesis certificate for the key the chain started under, which predates the root: on the chain’s first rotation, and only there.

Implementations

impl KeyRotation

pub fn routine( old_key: PublicKeyHex, new_signing_key: &SigningKey, prev_hash: Option<Sha256Hex>, now: DateTime<Utc>, certificate: KeyCertificate, ) -> Self

A scheduled rotation from old_key to new_signing_key.

The entry itself is signed by the old key; entries after it verify under the new one. prev_hash is the rotation entry’s own, and certificate is over KeyCertStatement::routine at it.

pub fn compromise( old_key: PublicKeyHex, new_signing_key: &SigningKey, prev_hash: Option<Sha256Hex>, now: DateTime<Utc>, certificate: KeyCertificate, ) -> Self

A declaration that old_key is compromised, trusted only through the last_trusted its certificate names.

The entry is signed by the new key — the old one proves nothing any more. last_trusted must name an entry from before any earlier compromise window; a reattestation inside one restores the entry, not the ability to anchor trust there.

pub fn with_outgoing(self, certificate: KeyCertificate) -> Self

This rotation, carrying the genesis key’s retroactive certificate

pub fn statement(&self, prev_hash: Option<Sha256Hex>) -> RotationStatement

The statement this rotation’s proof covers, at prev_hash

pub fn last_trusted(&self) -> Option<&TrustedHead>

Compromise only: the last entry trusted under old_key, as the root certified it

pub fn expected_statement( &self, seq: u64, prev_hash: Option<Sha256Hex>, ) -> Result<KeyCertStatement, RotationError>

What certificate must say for this rotation, appended at seq with prev_hash, to be authentic.

Derived from the chain. Only last_trusted is taken from the certificate, because only the root can say it.

pub fn verify_proof( &self, prev_hash: Option<Sha256Hex>, ) -> Result<(), RotationError>

Version and the proof of possession at the position prev_hash names

pub fn verify_certified( &self, seq: u64, prev_hash: Option<Sha256Hex>, roots: &RootSet, ) -> Result<(), RotationError>

verify_proof, and certificate is the root’s for this key at this position — everything checkable without the rest of the chain

Trait Implementations

impl Clone for KeyRotation

fn clone(&self) -> KeyRotation

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for KeyRotation

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for KeyRotation

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for KeyRotation

impl PartialEq for KeyRotation

fn eq(&self, other: &KeyRotation) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl Serialize for KeyRotation

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for KeyRotation