Enum UpgradeNeeded 

pub enum UpgradeNeeded {
    LegacyKdf,
    MissingIntegrityTag,
    UnboundRecords,
}

Why a store cannot be opened by KeyStore::open without being upgraded.

Each variant is a security property the store predates. They are reported rather than silently accommodated: every one of them was previously accepted on open, which meant a store could be downgraded into the weaker shape and opened without complaint.

Variants

LegacyKdf

Encrypted under the bare SHA-256 KDF — no salt, no iterations.

MissingIntegrityTag

No envelope HMAC, so the plaintext fields — including revoked — are unauthenticated and a record swap is undetectable.

UnboundRecords

Records are not bound to their fingerprints (pre-V4).

Trait Implementations

impl Clone for UpgradeNeeded

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for UpgradeNeeded

impl Debug for UpgradeNeeded

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

Formats the value using the given formatter.

impl Eq for UpgradeNeeded

impl PartialEq for UpgradeNeeded

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for UpgradeNeeded