Enum Error 

#[non_exhaustive]
pub enum Error {
    Cbor(String),
    UnexpectedType(String),
    Verify(String),
    InvalidState(String),
    AlgorithmMismatch {
        declared: String,
        expected: String,
    },
    KeyOperation(String),
    LimitExceeded {
        resource: String,
        limit: usize,
    },
    Custom(String),
}

Errors returned by COSE/CWT operations in this crate.

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.

Cbor(String)

Failed to encode or decode CBOR.

UnexpectedType(String)

A header, key or claim value was present but had an unexpected CBOR type.

Verify(String)

Signature, MAC or decryption verification failed.

InvalidState(String)

An operation was attempted in an invalid message lifecycle state.

AlgorithmMismatch

A declared message, header, or key algorithm did not match the expected algorithm.

Fields

declared: String

Algorithm declared by the message or key.

expected: String

Algorithm expected by the provider.

KeyOperation(String)

A COSE_Key key_ops restriction forbids the requested operation.

LimitExceeded

A configured parser or processing resource limit was exceeded.

Fields

resource: String

Name of the limited resource.

limit: usize

Configured upper bound.

Custom(String)

Any other COSE/CWT protocol error (malformed message, algorithm mismatch, missing parameter, …).

Implementations

impl Error

pub fn custom(msg: impl Into<String>) -> Self

Builds an Error::Custom from anything that can become a string.

pub fn verify(msg: impl Into<String>) -> Self

Builds an Error::Verify from anything that can become a string.

pub fn invalid_state(msg: impl Into<String>) -> Self

Builds an Error::InvalidState.

pub fn key_operation(msg: impl Into<String>) -> Self

Builds an Error::KeyOperation.

pub fn limit(resource: impl Into<String>, limit: usize) -> Self

Builds an Error::LimitExceeded.

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 Eq for Error

impl Error for Error

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

fn from(err: Error) -> Self

Converts to this type from the input type.

impl From<Error> for Error

fn from(err: Error) -> Self

Converts to this type from the input type.

impl PartialEq for Error

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for Error