import { BunRequest } from 'bun';
/**
 * Utility class for parsing HTTP `Authorization` headers from
 * {@link Request} or {@link BunRequest} objects.
 *
 * Supported authentication schemes:
 * - **Bearer**: via {@link getBearer()} — returns the token without the "Bearer " prefix.
 * - **Basic**: via {@link getCredentials()} — decodes Base64 credentials into `{ user, password }`.
 *
 * Throws {@link BadRequest} when the header is missing, malformed, or fails validation.
 */
export declare class AuthorizationParser {
    private readonly authorization;
    /**
     * Creates a new parser instance for the provided request.
     *
     * @param req - The HTTP request object.
     */
    constructor(req: Request | BunRequest);
    /**
     * Extracts the Bearer token from the `Authorization` header.
     *
     * @returns The raw Bearer token string (without the "Bearer " prefix).
     * @throws {BadRequest} If the header is missing, not using Bearer scheme, or too short.
     */
    getBearer(): string;
    /**
     * Extracts Basic Authentication credentials from the `Authorization` header.
     *
     * @returns An object containing `{ user, password }`.
     * @throws {BadRequest} If the header is missing, not using Basic scheme, or malformed.
     */
    getBasicCredentials(): {
        user: string;
        password: string;
    };
}