Enum StreamConfig 

pub enum StreamConfig {
    V0 {
        reserved_modulo: u8,
    },
    V1,
    V2,
    V3,
}

Per-version configuration for decrypt_ciphertext_stream.

Selects the padding scheme and trailer layout to use after the streaming CBC loop has consumed the ciphertext. Construct this from the (version, modulo_or_reserved) tuple returned by crate::decryption::read_file_version.

Format

Variant	Padding scheme	Trailer length	Trailer layout
V0	legacy modulo (low nibble of reserved_modulo)	32 B	contiguous HMAC tag
V1	legacy modulo (last buffered byte)	33 B	modulo byte then HMAC tag
V2	legacy modulo (last buffered byte)	33 B	modulo byte then HMAC tag
V3	PKCS#7 (1..=16)	32 B	contiguous HMAC tag

Security

V0/V1/V2 exist only for read compatibility; this crate never produces them. Use V3 for any new file.

Variants

V0

AES Crypt v0 — legacy modulo padding, 32-byte contiguous HMAC trailer.

reserved_modulo is the 5th header byte (the v0 modulo byte) and determines the final-block length: len = (reserved_modulo & 0x0F), or 16 when that nibble is zero.

Fields

reserved_modulo: u8

5th header byte; low nibble is the final-block byte count.

V1

AES Crypt v1 — legacy modulo padding with the modulo byte embedded in a 33-byte scattered trailer.

V2

AES Crypt v2 — same trailer/padding shape as v1, plus header extensions before the encrypted session block.

V3

AES Crypt v3 — PKCS#7 padding and a 32-byte contiguous HMAC-SHA256 trailer. The only format this crate writes.

Trait Implementations

impl Clone for StreamConfig

fn clone(&self) -> StreamConfig

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for StreamConfig