export declare const genAesCbcKey: (length?: number) => Promise<{
    privateKey: string;
}>;
export declare const encryptAesCbc: (keyStr: string, content: string, iv: ArrayBuffer, length?: number) => Promise<string>;
export declare const decryptAesCbc: (keyStr: string, encryptText: string, iv: ArrayBuffer, length?: number) => Promise<string>;