Struct SegmentDigestBuilder 

pub struct SegmentDigestBuilder {
    pub alg: DigestAlg,
    pub state: DigestState,
    pub segment_index: u32,
    pub frame_count: u32,
    pub finalized: bool,
}

Incremental segment digest builder.

This builder hashes canonical digest input bytes, not plaintext and not wire bytes.

Digest input format (canonical):

segment_index   (u32 LE)
frame_count     (u32 LE)
for each DATA frame, ordered by frame_index:
  frame_index   (u32 LE)
  ciphertext_len(u32 LE)
  ciphertext    (N bytes)

Fields

alg: DigestAlg

state: DigestState

segment_index: u32

frame_count: u32

finalized: bool

Implementations

impl SegmentDigestBuilder

pub fn new(alg: DigestAlg, segment_index: u32, frame_count: u32) -> Self

Create a new digest builder.

pub fn with_state( state: DigestState, segment_index: u32, frame_count: u32, ) -> Self

Create a verifier by resuming from an existing hydrated state. Used for frame-level resume within a single segment.

pub fn state(&self) -> DigestState

Returns a clone of the current internal state for checkpointing.

pub fn update_frame(&mut self, frame_index: u32, ciphertext: &[u8])

Feed one DATA frame (strictly ascending frame_index).

pub fn finalize(self) -> Result<Vec<u8>, DigestError>

Finalize and return digest bytes.

Can be called only once.