Struct Header 

pub struct Header {
    pub digest: [u8; 32],
    pub byte_size: u64,
    pub media_type: String,
    pub kek_id: String,
    pub stream_nonce: [u8; 19],
}

The authenticated header, decoded.

Fields

digest: [u8; 32]

Raw SHA-256 over the plaintext — the same bytes the address hexes.

byte_size: u64

media_type: String

kek_id: String

Nonsecret label of the KEK that wrapped this blob’s DEK.

stream_nonce: [u8; 19]

Implementations

impl Header

pub fn encode(&self) -> Vec<u8>

The exact bytes that open the container AND serve as associated data.

One function for both, deliberately: if the AAD were assembled separately from the bytes on disk, the two could disagree and the authentication would be checking something the reader never parsed.

pub fn decode(bytes: &[u8]) -> Result<(Self, usize), BlobError>

Parse a header, returning it and how many bytes it occupied.

Strict: unknown magic, an unknown version, a length that runs past the buffer, or non-UTF-8 in either string is a refusal. Nothing here is recovered from or guessed at — the header is the thing every other byte is authenticated against.

Trait Implementations

impl Clone for Header

fn clone(&self) -> Header

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Header

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

Formats the value using the given formatter.

impl Eq for Header

impl PartialEq for Header

fn eq(&self, other: &Header) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for Header