Enum Error 

pub enum Error {
    GenericError(Option<String>),
    ProtocolError,
    EOF,
    InaccessibleDecryptionKey(Vec<InaccessibleDecryptionKey>),
    NotDecryptionCapable(String),
    NotSigningCapable(String),
    InternalError(String),
    ExternalImportRequired(Option<String>),
    SecretKeyMaterialSealed(Option<String>),
    NoInlinePassword(Option<String>),
    NoExternalPassword(Option<String>),
    RpcError(Error),
}

Errors returned from the keystore.

Variants

GenericError(Option<String>)

A generic error occurred.

The other error variants aren’t appropriate for representing this error. The text describes what went wrong.

ProtocolError

An unspecified protocol error occurred.

EOF

An end of file condition was reached.

This is also used for iterations to indicate that there are no more items.

InaccessibleDecryptionKey(Vec<InaccessibleDecryptionKey>)

An operation couldn’t be completed, because a required key is inaccessible (unavailable, or locked).

This is returned by Keystore::decrypt. Repeat the operation after ensuring that one of the keys is available by prompting the user to connect it, or unlocking the key.

NotDecryptionCapable(String)

The key cannot be used for decryption.

NotSigningCapable(String)

The key cannot be used for signing.

InternalError(String)

An internal server error occurred.

ExternalImportRequired(Option<String>)

The backend doesn’t support importing keys using this interface.

Some backends require backend-specific information in order to import a key. For instance, when importing a key to a smartcard, the user needs to specify the smartcard, and the slot to use on the smartcard. Rather than try and model these parameters using this generic interface, backends should just have their own tools. The text should be a hint that is displayed to the user describing how to find the tool.

SecretKeyMaterialSealed(Option<String>)

The secret key material cannot be exported.

This error is returned by Key::export if the secret key material cannot be exported. Many backends do not allow exporting secret key material. Some may only allow exporting secret key material in admin mode. The text is a more detailed description of why this is not possible, or what the user could do to export the secret key material.

NoInlinePassword(Option<String>)

The key doesn’t support inline passwords.

Password entry is taken care of by the device managing the key. For instance, the password may be obtained using an external PIN pad.

NoExternalPassword(Option<String>)

The key doesn’t support getting passwords.

The password must be provided inline. The password cannot be obtained using something like an external PIN pad.

RpcError(Error)

A capnp::Error occurred.

Trait Implementations

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, __formatter: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

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(source: Error) -> Self

Converts to this type from the input type.

impl From<NotInSchema> for Error

fn from(_: NotInSchema) -> Self

Converts to this type from the input type.