/** * Encrypt a message body using the SCE/OMEMO 2 scheme. * * Returns the 48-byte key_and_tag (content_key ‖ truncated-HMAC) as an * ArrayBuffer — this is what gets encrypted with SessionCipher per device — * and the base64-encoded AES-256-CBC ciphertext as the value. * * @param {string|null} plaintext - the message body to encrypt (omitted when falsy) * @param {{from_jid: string, to_jid: string|null}} affixes * @param {import('strophe.js').Builder[]} [extensions] - body-coupled metadata elements * @returns {Promise<{key_and_tag: ArrayBuffer, payload: string}>} */ export function encryptSCE(plaintext: string | null, affixes: { from_jid: string; to_jid: string | null; }, extensions?: import("strophe.js").Builder[]): Promise<{ key_and_tag: ArrayBuffer; payload: string; }>; /** * Decrypt an SCE/OMEMO 2 payload. * * Returns both the plaintext body string and the decrypted `` element, * so callers can re-run the normal stanza parsers (references/reply/oob/spoiler, * but also chat states / markers / reactions) against the authenticated content. * `content` is `null` only when the envelope carries no `` element; * `body` is `null` when there's no `` — i.e. a metadata-only message. * * @param {ArrayBuffer} key_and_tag - 48-byte tuple: content_key(32) ‖ HMAC(16) * @param {string} payload_b64 - base64-encoded AES-256-CBC ciphertext * @param {{sender_jid: string, to_jid?: string|null}} expected_affixes - for validation * @returns {Promise<{body: string|null, content: Element|null}>} */ export function decryptSCE(key_and_tag: ArrayBuffer, payload_b64: string, expected_affixes: { sender_jid: string; to_jid?: string | null; }): Promise<{ body: string | null; content: Element | null; }>; //# sourceMappingURL=sce.d.ts.map