/**
 * Per-operation options for cipher facades.
 * Core only forwards these to mode/cipher components; mode-specific keys such as
 * `nonce`, `aad`, `tag`, and `tagLength` belong to the mode implementation.
 */
export type CipherOperationOptions = Record<string, unknown>;
export interface DerivedKeyCipherOperationOptions extends CipherOperationOptions {
    salt?: Uint8Array | string | null;
}
/** Keys that must not be overridden by operation options. */
export declare const RESERVED_OPERATION_OPTION_KEYS: readonly ["cipher", "mode", "padding", "key", "kdf", "format", "keySize", "ivSize", "saltSize"];
export declare function assertNoReservedOperationOptions(options: Record<string, unknown> | undefined): void;
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