/// <reference types="node" />
import { BinaryToTextEncoding, CipherKey, Encoding } from "crypto";
import { CIPHER_INFO } from "./ciphers";
export interface KeyStoreOpts {
    signing?: {
        keys: string[];
        algorithm?: string | 'blake2b512' | 'blake2s256' | 'gost' | 'md4' | 'md5' | 'rmd160' | 'sha1' | 'sha224' | 'sha256' | 'sha3-224' | 'sha3-256' | 'sha3-384' | 'sha3-512' | 'sha384' | 'sha512' | 'sha512-224' | 'sha512-256' | 'shake128' | 'shake256' | 'sm3';
        encoding?: BinaryToTextEncoding;
    };
    encryption?: {
        keys: string[] | CipherKey[];
        algorithm?: keyof typeof CIPHER_INFO | string;
        encoding?: Encoding;
        authTagLength?: number;
    };
}
export declare type EncryptOptions = Required<KeyStoreOpts['encryption']> & {
    key?: string | undefined;
};
export declare type DecryptOptions = Required<KeyStoreOpts['encryption']> & {
    key?: string | CipherKey | undefined;
    iv?: string | Buffer | undefined;
    authTag?: string | Buffer | undefined;
};
export declare class KeyStore {
    encryption: Required<NonNullable<KeyStoreOpts['encryption']>>;
    signing: Required<NonNullable<KeyStoreOpts['signing']>>;
    static cipherInfo: Record<string, {
        ivLength: number | undefined;
        keyLength: number;
    }>;
    constructor(opts?: KeyStoreOpts);
    encrypt(data?: null, options?: Partial<EncryptOptions>): null;
    encrypt(data: string | Buffer, options?: Partial<EncryptOptions>): string;
    decrypt(data?: null, options?: Partial<DecryptOptions>): null;
    decrypt(data: string | Buffer, options?: Partial<DecryptOptions>): string;
    private static doDecrypt;
    sign(data?: null, key?: string | CipherKey): null;
    sign(data: string, key?: string | CipherKey): string;
    verify(data: string, digest: string): boolean;
    indexOf(data: string, digest: string): number;
}
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