Struct ChunkSigner 

pub struct ChunkSigner {
    signing_key: Vec<u8>,
    scope: String,
    ts: String,
    prev_sig: String,
}

Stateful per-chunk signer for STREAMING-AWS4-HMAC-SHA256-PAYLOAD uploads.

Each call to sign_chunk produces the chunk-signature trailer required by AWS chunked encoding and advances the internal HMAC chain for the next chunk.

Fields

signing_key: Vec<u8>

scope: String

ts: String

prev_sig: String

Implementations

impl ChunkSigner

pub fn new( signing_key: Vec<u8>, scope: String, ts: String, seed_signature: String, ) -> Self

create a new signer.
seed_signature is the signature you put in the Authorization header Create a new ChunkSigner from the seed values established during the initial header signing step.

pub fn sign_chunk( &mut self, chunk: Bytes, ) -> Result<Bytes, Box<dyn Error + Send + Sync>>

sign one payload chunk and return the wire bytes and update internal state.

pub fn final_chunk(&mut self) -> Bytes

Final 0-length chunk (must be sent after the body) Produce the zero-length terminal chunk that signals end-of-stream.