import { PrepareResult } from "../processor";
/**
 * An object containing a secret and salt.
 * @property secret A secret string used to encrypt and decrypt content.
 * @property salt A salt string used to encrypt and decrypt content.
 */
export interface SecretAndSalt {
    secret: string;
    salt: string;
}
/**
 * Generates a random 256 bit secret and salt for use in symmetric encryption.
 * @returns An array containing the secret and salt as {@link SecretAndSalt}.
 */
export declare function generateRandomSecretAndSalt(): SecretAndSalt;
/**
 * Creates a function that encrypts and decrypts content using AES encryption,
 * used in a SQL template literal. The encryption is symmetric, meaning the same
 * secret is used to both encrypt and decrypt content.
 *
 * Note: this is, in part, a demonstration of how to implement your own
 * processor; it is not recommended to use this in production as more secure
 * options exist.
 * @param secret A secret string used to encrypt and decrypt content.
 * @param salt A salt string used to encrypt and decrypt content.
 * @returns An instance of {@link PrepareResult}.
 */
export declare function symmetricEncrypt(secret: string, salt: string): PrepareResult;