import type { Sha3Exports } from '../mlkem/types.js';
/** Absorb msg into the sponge in ≤168-byte chunks. Caller must have
 *  already invoked the appropriate Init function (shake128Init etc.). */
export declare function sha3Absorb(sx: Sha3Exports, msg: Uint8Array): void;
/** SHAKE256(msg, n), fixed-length output. Resets sha3 state. */
export declare function shake256Hash(sx: Sha3Exports, msg: Uint8Array, n: number): Uint8Array;
/** SHAKE256(p₀ ‖ p₁ ‖ … ‖ p_{n-1}, outLen). Avoids the temporary buffer
 *  callers would otherwise allocate just to concatenate fixed-size pieces.
 *  Used for keygen's H(ξ ‖ k_byte ‖ ℓ_byte, 128). */
export declare function shake256HashConcat(sx: Sha3Exports, parts: readonly Uint8Array[], outLen: number): Uint8Array;
/**
 * Set up SHAKE128 over `seed` and return an incremental block-squeezer.
 * Each call returns the next 168-byte block as a Uint8Array view into the
 * sha3 OUT region (lifetime: until the next squeeze call). Callers copy
 * into the consuming module's XOF buffer before invoking the rejection
 * sampler. Used by ExpandA (FIPS 204 Algorithm 32, RejNTTPoly driver).
 */
export declare function shake128Squeezer(sx: Sha3Exports, seed: Uint8Array): {
    rate: number;
    squeeze: () => Uint8Array;
};
/**
 * Set up SHAKE256 over `seed` and return an incremental block-squeezer.
 * Same shape as shake128Squeezer with rate 136. Used by ExpandS
 * (FIPS 204 Algorithm 33, RejBoundedPoly driver).
 */
export declare function shake256Squeezer(sx: Sha3Exports, seed: Uint8Array): {
    rate: number;
    squeeze: () => Uint8Array;
};