declare class JSEncrypt{

  constructor(options?);
  /**
   * Method to set the rsa key parameter (one method is enough to set both the public
   * and the private key, since the private key contains the public key paramenters)
   * Log a warning if logs are enabled
   * @param {Object|string} key the pem encoded string or an object (with or without header/footer)
   * @public
   */
  setKey(key: string);
  /**
   * Proxy method for setKey, for api compatibility
   * @see setKey
   * @public
   */
  setPrivateKey(privkey: string);
  /**
   * Proxy method for setKey, for api compatibility
   * @see setKey
   * @public
   */
  setPublicKey(pubkey: string);

  /**
   * Proxy method for RSAKey object's decrypt, decrypt the string using the private
   * components of the rsa key object. Note that if the object was not set will be created
   * on the fly (by the getKey method) using the parameters passed in the JSEncrypt constructor
   * @param {string} string base64 encoded crypted string to decrypt
   * @return {string} the decrypted string
   * @public
   */
  decrypt(string): string|false;

/**
 * Proxy method for RSAKey object's encrypt, encrypt the string using the public
 * components of the rsa key object. Note that if the object was not set will be created
 * on the fly (by the getKey method) using the parameters passed in the JSEncrypt constructor
 * @param {string} string the string to encrypt
 * @return {string} the encrypted string encoded in base64
 * @public
 */
  encrypt(string) :string|false;

/**
 * Getter for the current JSEncryptRSAKey object. If it doesn't exists a new object
 * will be created and returned
 * @param {callback} [cb] the callback to be called if we want the key to be generated
 * in an async fashion
 * @returns {JSEncryptRSAKey} the JSEncryptRSAKey object
 * @public
 */
getKey(cb);

/**
 * Returns the pem encoded representation of the private key
 * If the key doesn't exists a new key will be created
 * @returns {string} pem encoded representation of the private key WITH header and footer
 * @public
 */
getPrivateKey();

/**
 * Returns the pem encoded representation of the private key
 * If the key doesn't exists a new key will be created
 * @returns {string} pem encoded representation of the private key WITHOUT header and footer
 * @public
 */
getPrivateKeyB64();

/**
 * Returns the pem encoded representation of the public key
 * If the key doesn't exists a new key will be created
 * @returns {string} pem encoded representation of the public key WITH header and footer
 * @public
 */
getPublicKey();

/**
 * Returns the pem encoded representation of the public key
 * If the key doesn't exists a new key will be created
 * @returns {string} pem encoded representation of the public key WITHOUT header and footer
 * @public
 */
getPublicKeyB64();

}