Enum SmimeError 

#[non_exhaustive]
pub enum SmimeError {
    Der(Error),
    UnsupportedAlgorithm(String),
    NoMatchingRecipient,
    SignatureVerification,
    CertChain(CertChainError),
    MalformedInput(String),
    NoRecipients,
    RngFailure(String),
    DecryptionFailed(String),
    Other(String),
    AllSignersFailed(Vec<SignerResult>),
    WrongContentType(String),
    BoundaryCollision,
}

Error type for S/MIME operations.

Serde round-trip

SmimeError implements Serialize and Deserialize. The Der variant contains a der::Error which has no serde support, so it round-trips through a string representation: serialized as {"Der":"<message>"}, deserialized back as SmimeError::Der with a der::Error carrying the message (the original error kind is not preserved across serialization boundaries).

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.

Der(Error)

DER encoding/decoding failure.

UnsupportedAlgorithm(String)

The algorithm identified by the given OID is not supported.

NoMatchingRecipient

No decryption key matches any RecipientInfo in the EnvelopedData.

SignatureVerification

Signature verification failed.

CertChain(CertChainError)

Certificate chain validation failed.

MalformedInput(String)

Input is structurally malformed (e.g. missing required CMS fields).

NoRecipients

encrypt() was called with an empty recipients slice.

RngFailure(String)

OS random number generator failed during a crypto operation. This indicates a catastrophic system-level failure.

DecryptionFailed(String)

Decryption failed (e.g. bad padding, wrong CEK, or corrupted ciphertext).

Other(String)

Catch-all for operation errors not covered by a more specific variant.

AllSignersFailed(Vec<SignerResult>)

All signers in the CMS SignedData failed verification. The signers vec contains per-signer error details.

WrongContentType(String)

The ContentInfo content type is not what this operation expects. For example, passing a SignedData blob to decrypt().

BoundaryCollision

The content contains a MIME boundary that matches the generated separator even after 8 random retries. This is extraordinarily unlikely in practice.

Trait Implementations

impl Clone for SmimeError

fn clone(&self) -> SmimeError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for SmimeError

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for SmimeError

fn deserialize<D: Deserializer<'de>>(deserializer: D) -> Result<Self, D::Error>

Deserialize this value from the given Serde deserializer.

impl Display for SmimeError

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

Formats the value using the given formatter.

impl Eq for SmimeError

impl Error for SmimeError

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 SmimeError

fn from(e: Error) -> Self

Converts to this type from the input type.

impl PartialEq for SmimeError

fn eq(&self, other: &SmimeError) -> 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 Serialize for SmimeError

fn serialize<S: Serializer>(&self, serializer: S) -> Result<S::Ok, S::Error>

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for SmimeError