Enum KeyError 

pub enum KeyError {
    DeviceIdEncoding,
    StoreClosed,
    File(FileError),
    Crypto(CryptoError),
    Material(MaterialError),
    PassphraseAuthentication,
    PassphraseHeader,
    PassphraseParameters,
    Unavailable(Box<dyn Error + Send + Sync>),
    Keychain(KeychainError),
    KeychainTemporarilyUnavailable(KeychainError),
    MissingKeychainEntitlement(KeychainError),
    InvalidServiceName,
    Unsupported,
    SavedEntriesFull,
    SavedEntryTooLarge,
    Left,
    RestoreCodeStoreId,
    Shutdown(Shutdown),
    Bug(Bug),
}

A failure unlocking, keeping or forgetting keys or host secrets (E11).

Variants

DeviceIdEncoding

The device-only installation id is malformed.

StoreClosed

The handle that owns this custody has closed.

File(FileError)

A filesystem operation failed; the cause says whether bytes changed.

Crypto(CryptoError)

A cryptographic service was unavailable or stored bytes failed validation.

Material(MaterialError)

Decrypted or keychain-provided material was malformed.

PassphraseAuthentication

A wrong passphrase or altered file failed authentication.

PassphraseHeader

The passphrase file’s header was malformed or unsupported.

PassphraseParameters

Recorded Argon2id parameters exceed the accepted resource bounds.

Unavailable(Box<dyn Error + Send + Sync>)

The device lacks resources needed to unlock or keep keys.

Keychain(KeychainError)

The OS credential store refused an operation.

KeychainTemporarilyUnavailable(KeychainError)

Custody cannot be accessed right now, but the same call succeeds once the session unlocks: native NoStorageAccess, or on Apple errSecInteractionNotAllowed (OSStatus -25308), which a locked device, a sleeping display or a session that can’t show UI answers (§12.4). The native cause says why access was denied.

MissingKeychainEntitlement(KeychainError)

Apple’s errSecMissingEntitlement (OSStatus -34018): the app has no keychain-access-groups entitlement backed by a provisioning profile. Every keychain call fails the same way until the app is signed with one; retrying changes nothing.

InvalidServiceName

The service name is empty or contains a NUL.

Unsupported

The person’s entries need iCloud Keychain or Block Store: Apple platforms, or an Android phone with Google Play services.

SavedEntriesFull

Block Store already holds its 16 entries for the app, so a new entry can’t be saved (§13.1). Forgetting a saved code makes room.

SavedEntryTooLarge

A saved code doesn’t fit in Block Store’s 1,024 bytes for an entry, even with the store’s name shortened (§13.1).

Left

The person left the store, so their saved entries stay deleted (§14.1).

RestoreCodeStoreId

A saved restore-code account’s id part is not a store id as coven writes it.

Shutdown(Shutdown)

The call’s runtime is shutting down and dropped it partway, so what it changed in custody is unknown (E15).

Bug(Bug)

The call’s custody work panicked: a bug, which the caller reports (E15). What it changed in custody is unknown.

Trait Implementations

impl CarriesBug for KeyError

fn bug(&self) -> Option<&Bug>

The bug this error carries, itself or through the failure it keeps.

impl Debug for KeyError

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

Formats the value using the given formatter.

impl Display for KeyError

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

Formats the value using the given formatter.

impl Error for KeyError

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0: use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0: replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)

Provides type-based access to context intended for error reports.

impl From<Bug> for KeyError

fn from(source: Bug) -> Self

Converts to this type from the input type.

impl From<CryptoError> for KeyError

fn from(source: CryptoError) -> Self

Converts to this type from the input type.

impl From<FileError> for KeyError

fn from(error: FileError) -> Self

Converts to this type from the input type.

impl From<KeyError> for IdentityError

fn from(error: KeyError) -> Self

Converts to this type from the input type.

impl From<KeychainError> for KeyError

fn from(error: KeychainError) -> Self

Converts to this type from the input type.

impl From<MaterialError> for KeyError

fn from(source: MaterialError) -> Self

Converts to this type from the input type.

impl From<Shutdown> for KeyError

fn from(source: Shutdown) -> Self

Converts to this type from the input type.

impl From<TaskFailed> for KeyError

fn from(failed: TaskFailed) -> Self

Converts to this type from the input type.