Enum Error 

pub enum Error {
    Success,
    DoesAlreadyExist,
    DoesNotExist,
    KeyStoreFull,
    OutOfMemory,
    Timeout,
    Other,
    InitializationFailed,
    InvalidCallbackResult,
    CborCommandFailed(i32),
    InvalidClientDataHash,
    NoCredentials,
    PinAuthRequired,
    UnauthorizedPermission,
    InvalidRpIdHash,
    PinTokenExpired,
    InvalidSubcommand,
    CtapError(u8),
    IoError(String),
    InvalidPinLength,
}

Error type for CTAP operations

Variants

Success

The given operation was successful

DoesAlreadyExist

The given value already exists

DoesNotExist

The requested value doesn’t exist

KeyStoreFull

Credentials can’t be inserted into the key-store

OutOfMemory

The client ran out of memory

Timeout

The operation timed out

Other

Unspecified operation

InitializationFailed

Initialization failed

InvalidCallbackResult

Invalid callback result

CborCommandFailed(i32)

CBOR command failed

InvalidClientDataHash

Invalid client data hash (must be 32 bytes)

NoCredentials

No credentials exist for the requested operation

Returned when:

• Attempting to enumerate credentials for an RP with no credentials
• Attempting to delete a non-existent credential

PinAuthRequired

PIN/UV authentication required but not provided

UnauthorizedPermission

PIN/UV auth token has insufficient permissions

The token may not have the required permission bit set, or may have the wrong permissions RP ID.

InvalidRpIdHash

Invalid RP ID hash

RP ID hash must be exactly 32 bytes (SHA-256 output).

PinTokenExpired

PIN/UV auth token has expired

InvalidSubcommand

Invalid subcommand for credential management

CtapError(u8)

CTAP error with status code

IoError(String)

IO error (from transport operations)

InvalidPinLength

Invalid PIN length (must be 4-63 characters)

Implementations

impl Error

pub fn parse_ctap_response(data: &[u8]) -> Result<&[u8]>

Parse CTAP response and extract CBOR data

CTAP responses follow the format: [status_byte, ...cbor_data]

• 0x00 = success, returns the CBOR data
• !0x00 = error, converts status byte to Error

This is the single source of truth for CTAP status code handling.

Trait Implementations

impl Clone for Error

fn clone(&self) -> Error

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Error

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

Formats the value using the given formatter.

impl Display for Error

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

Formats the value using the given formatter.

impl Error for Error

Available on crate feature std only.

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<Error> for Error

Available on crate feature std only.

fn from(error: Error) -> Self

Converts to this type from the input type.

impl From<Error> for StatusCode

fn from(error: Error) -> Self

Converts to this type from the input type.

impl From<StatusCode> for Error

fn from(status: StatusCode) -> Self

Converts to this type from the input type.

impl From<i32> for Error

fn from(value: i32) -> Self

Converts to this type from the input type.

impl PartialEq for Error

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for Error