/**
 * @license
 * Copyright 2026 Steven Roussey <sroussey@gmail.com>
 * SPDX-License-Identifier: Apache-2.0
 */
/**
 * Hash algorithms supported by {@link createHmac}. Names follow the Node
 * `crypto` convention; WebCrypto-style names (e.g. `"SHA-256"`) are also
 * accepted and normalized.
 */
export type HmacHash = "sha1" | "sha256" | "sha384" | "sha512";
/** Output encoding for {@link createHmac}. `"bytes"` returns the raw {@link Uint8Array}. */
export type HmacEncoding = "hex" | "base64" | "base64url" | "bytes";
/**
 * Computes an HMAC over `data` using `key` and the given hash `algorithm`.
 *
 * @param algorithm - Hash to use, e.g. `"sha256"`.
 * @param key - Secret key, as a UTF-8 string or raw bytes.
 * @param data - Message to authenticate, as a UTF-8 string or raw bytes.
 * @param encoding - Output format. Defaults to `"hex"`.
 */
export declare function createHmac(algorithm: HmacHash, key: string | Uint8Array, data: string | Uint8Array, encoding?: "hex" | "base64" | "base64url"): Promise<string>;
export declare function createHmac(algorithm: HmacHash, key: string | Uint8Array, data: string | Uint8Array, encoding: "bytes"): Promise<Uint8Array>;
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