Enum ErrorKind 

#[non_exhaustive]
pub enum ErrorKind {
    InvalidArgument,
    InvalidPin,
    InvalidResponse,
    ProtocolViolation,
    LimitExceeded,
    AuthenticationFailed,
    DeviceAuthenticationFailed,
    PinBlocked,
    SecurityStatusNotSatisfied,
    ConditionsNotSatisfied,
    NotFound,
    UnsupportedDevice,
    UnsupportedFeature,
    UnsupportedAlgorithm,
    CapabilityUnknown,
    UnsupportedProtocolVersion,
    UnexpectedStatusWord,
    OperationStateError,
}

Stable semantic categories for protocol failures. Transport errors stay outside the core; callers must allow future variants of this non-exhaustive enum.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

InvalidArgument

A caller value or options combination is invalid.

InvalidPin

PIN/PUK bytes violate applet input rules.

InvalidResponse

Response framing or semantic content is malformed.

ProtocolViolation

The exchange sequence violates its conversation rules.

LimitExceeded

A frame, input, response, nesting, or exchange budget was exceeded.

AuthenticationFailed

Explicit credential verification failed; retry information may be present.

DeviceAuthenticationFailed

The card’s mutual-authentication cryptogram did not match the host challenge.

PinBlocked

A credential reference is blocked.

SecurityStatusNotSatisfied

Required authentication/security state is absent.

ConditionsNotSatisfied

The card reports unmet execution conditions.

NotFound

A requested applet object/reference was not found.

UnsupportedDevice

The required applet/device could not be selected.

UnsupportedFeature

A capability or instruction is known to be unavailable.

UnsupportedAlgorithm

The requested algorithm cannot be used for this operation.

CapabilityUnknown

Available evidence cannot establish required capability support.

UnsupportedProtocolVersion

An observed format/version is not understood (including certificate encoding).

UnexpectedStatusWord

An unmapped status was returned; inspect Error::status_word or Error::application_status.

OperationStateError

A local lifecycle method was called in an invalid state.

Trait Implementations

impl Clone for ErrorKind

fn clone(&self) -> ErrorKind

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for ErrorKind

impl Debug for ErrorKind

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

Formats the value using the given formatter.

impl Eq for ErrorKind

impl PartialEq for ErrorKind

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for ErrorKind