Enum PasswordDetectionMethod 

#[non_exhaustive]
pub enum PasswordDetectionMethod {
    EarlyHeaderValidation,
    CrcMismatch,
    DecompressionFailure,
}

How a wrong password was detected.

This enum indicates the method used to detect that an incorrect password was provided for an encrypted archive. Use Error::PasswordRequired instead when no password was provided at all.

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.

EarlyHeaderValidation

Detected early by checking if decrypted data looks like valid compression headers.

This is the fastest detection method as it only requires decrypting and examining the first block of data. It works by checking if the decrypted bytes form valid LZMA/LZMA2/Deflate/etc. header patterns.

CrcMismatch

Detected after decompression via CRC-32 mismatch.

This method requires full decompression of the entry before the wrong password can be detected. It’s slower but catches cases where early detection isn’t possible (e.g., encrypted-only data without compression).

DecompressionFailure

Detected due to decompression failure.

The decrypted data caused the decompressor to fail, which typically indicates garbage data from a wrong password.

Trait Implementations

impl Clone for PasswordDetectionMethod

fn clone(&self) -> PasswordDetectionMethod

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for PasswordDetectionMethod

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

Formats the value using the given formatter.

impl Display for PasswordDetectionMethod

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

Formats the value using the given formatter.

impl PartialEq for PasswordDetectionMethod

fn eq(&self, other: &PasswordDetectionMethod) -> 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 Copy for PasswordDetectionMethod

impl Eq for PasswordDetectionMethod

impl StructuralPartialEq for PasswordDetectionMethod