Struct EncryptedFileMeta 

pub struct EncryptedFileMeta {
    pub megolm_session_id: String,
    pub wrapped_key_b64: String,
    pub nonce_b64: String,
    pub content_hash: String,
    pub content_mac_b64: Option<String>,
}

Metadata for an encrypted file transfer, carried in FileOffer. The ChaCha20-Poly1305 file key is Megolm-wrapped (wrapped_key_b64); the content_hash is bound as AEAD associated data.

Fields

megolm_session_id: String

wrapped_key_b64: String

nonce_b64: String

content_hash: String

SHA-256 of the plaintext, hex-encoded. Bound as AEAD associated data so the (key, nonce, ciphertext) triple can’t be replayed against different content, and verified after decryption.

huddle 2.2 (audit FILES-2): EMPTY when content_mac_b64 is set — the plaintext hash is exactly the relay-visible confirmation oracle we’re removing, so a v2 sender carries the keyed MAC instead and leaves this blank. A legacy receiver (which requires this field) won’t be a recipient: the sender only goes private when every member is capable.

content_mac_b64: Option<String>

huddle 2.2 (audit FILES-2): base64 of HMAC-SHA256(HKDF(file_key, "huddle-file-mac-v2"), plaintext) — a keyed content commitment used as AEAD associated data in place of content_hash. Only room members (who hold the Megolm-wrapped file key) can compute it, so the relay no longer learns SHA256(plaintext). #[serde(default, skip_serializing_if = "Option::is_none")] keeps pre-2.2 FileOffers byte-identical; when None the legacy content_hash path applies.

Trait Implementations

impl Clone for EncryptedFileMeta

fn clone(&self) -> EncryptedFileMeta

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for EncryptedFileMeta

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for EncryptedFileMeta

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for EncryptedFileMeta

impl PartialEq for EncryptedFileMeta

fn eq(&self, other: &EncryptedFileMeta) -> 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 Serialize for EncryptedFileMeta

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for EncryptedFileMeta