Enum CryptMethod 

pub enum CryptMethod {
    Rc4,
    Aes128,
    Aes256,
}

Per-object encryption modes. Picked from the file’s encryption dictionary at open time — every crypt operation uses the same mode (round-4 doesn’t yet support per-stream crypt-filter overrides; if the file requires that, decryption surfaces a clear error).

Variants

Rc4

Algorithm 1 + RC4. Used when V ∈ {1, 2}, or V=4 with CFM=V2.

Aes128

Algorithm 1 + AES-128 CBC. Used when V=4 with CFM=AESV2.

Aes256

AES-256 CBC. Used when V=5 (R=5 / R=6) with CFM=AESV3. Per ISO 32000-2:2020 §7.6.3.1 the per-object key derivation (Algorithm 1) is not applied — the file encryption key is fed to AES-256 directly. The IV is still the leading 16 bytes of the ciphertext as for AESV2.

Trait Implementations

impl Clone for CryptMethod

fn clone(&self) -> CryptMethod

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for CryptMethod

impl Debug for CryptMethod

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

Formats the value using the given formatter.

impl Eq for CryptMethod

impl PartialEq for CryptMethod

fn eq(&self, other: &CryptMethod) -> 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 StructuralPartialEq for CryptMethod