Enum CredentialErrorKind 

#[non_exhaustive]
pub enum CredentialErrorKind {
    ProtocolViolation,
    UnsupportedExtension,
    UnsupportedAlgorithm,
    ConstraintExceeded,
    InconsistentDetails,
    KeyNotPresent,
    VerifyFailed,
}

Classification of a CredentialError.

The variants in here are mainly used for debug output, and all signify that the processing of the token was not successful. This type can be used to construct a CredentialError.

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.

ProtocolViolation

Input data contains items that violate a protocol.

This is somewhat fuzzy towards UnsupportedExtension if extension points are not clearly documented or understood in a protocol.

UnsupportedExtension

Input data contains items that are understood in principle, but not supported by the implementation.

In the fuzziness towards ProtocolViolation, it is preferred to err on the side of UnsupportedExtension.

UnsupportedAlgorithm

Input data uses a COSE algorithm that is not supported by the implementation.

ConstraintExceeded

The data looks fine to a point, but exceeds the capacity of the implementation (data or identifier too long).

InconsistentDetails

Input data is understood, but self-contradictory.

Example: A COSE encrypted item where the nonce length does not match the algorithm’s requirements.

KeyNotPresent

The peer expects to use key material which is not known to this system.

VerifyFailed

Data could be processed and keys were found, but cryptographic verification was unsuccessful.

Trait Implementations

impl Clone for CredentialErrorDetail

fn clone(&self) -> CredentialErrorDetail

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for CredentialErrorDetail

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

Formats the value using the given formatter.

impl From<CredentialErrorDetail> for CredentialError

fn from(value: CredentialErrorDetail) -> Self

Converts to this type from the input type.

impl Copy for CredentialErrorDetail