import crypto from 'crypto';
interface VerifyParams {
    data: string;
    sign: string;
    publicKey: string | Buffer | crypto.KeyObject;
}
interface DigitalEnvelopeResult {
    status: 'success' | 'failed';
    result: string;
    message: string;
}
export declare class VerifyUtils {
    /**
     * Creates a KeyObject from various public key/certificate inputs.
     * Handles PEM Public Key blocks that actually contain certificates.
     * @param certOrKey - Certificate content (PEM), PEM public key (potentially containing a cert), or raw public key string/Buffer.
     * @returns The public key as a KeyObject.
     * @throws Error if input is invalid or public key cannot be extracted/created.
     */
    static getPublicKeyObject(certOrKey: string | Buffer): crypto.KeyObject;
    /**
     * Validates RSA signature for YOP API responses.
     * Assumes the signature should be verified against the string representation of the 'result' field in the JSON response.
     * @param params - Parameters containing the full response body string (data), the signature (sign), and the public key.
     * @returns Whether the signature is valid.
     */
    static isValidRsaResult(params: VerifyParams): boolean;
    /**
     * Handles digital envelope decryption
     * @param content - Digital envelope content
     * @param isv_private_key - Merchant private key
     * @param yop_public_key - YOP platform public key (string, Buffer, or KeyObject)
     * @returns Processing result
     */
    static digital_envelope_handler(content: string, isv_private_key: string, yop_public_key: string | Buffer | crypto.KeyObject): DigitalEnvelopeResult;
    /**
     * Validates merchant notification signature (or similar signed data)
     * @param result - Result data string to verify
     * @param sign - Signature
     * @param public_key - Public key (string, Buffer, or KeyObject)
     * @returns Whether the signature is valid
     */
    static isValidNotifyResult(result: string, sign: string, public_key: string | Buffer | crypto.KeyObject): boolean;
    static base64_safe_handler(data: string): string;
    static key_format(key: string): string;
    static rsaDecrypt(content: string, privateKey: string): Buffer;
    static aesDecrypt(encrypted: string, key: Buffer): string;
    static getBizResult(content: string, format?: string): string;
}
export default VerifyUtils;