/// <reference types="node" />
/**
 * Signs an SMB2 message buffer **without** the 4-byte NetBIOS transport prefix.
 *
 * Per MS-SMB2 section 3.1.4.1 (for SMB 2.0.2 / 2.1):
 *  1. Set the Signed flag (bit 3) in the Flags field.
 *  2. Zero the 16-byte Signature field.
 *  3. Compute HMAC-SHA-256(SigningKey, entireMessage).
 *  4. Copy the first 16 bytes of the HMAC into the Signature field.
 *
 * @param sessionKey  The 16-byte session signing key.
 * @param message     The SMB2 message buffer (header + body, no NetBIOS prefix).
 * @returns           The signed message buffer (modified in place and returned).
 */
export declare function signMessage(sessionKey: Buffer, message: Buffer): Buffer;
/**
 * Verifies the signature of an incoming SMB2 message buffer
 * **without** the 4-byte NetBIOS transport prefix.
 *
 * @param sessionKey  The 16-byte session signing key.
 * @param message     The SMB2 message buffer (header + body, no NetBIOS prefix).
 * @returns           `true` if the signature is valid.
 */
export declare function verifyMessage(sessionKey: Buffer, message: Buffer): boolean;
/**
 * Checks whether the Signed flag is set in a message's SMB2 header.
 *
 * @param message  The SMB2 message buffer (no NetBIOS prefix).
 */
export declare function isMessageSigned(message: Buffer): boolean;