import { Readable } from '@web5/common';
export declare enum CipherAlgorightm {
    AES_256_CBC = "aes-256-cbc",
    AES_256_CTR = "aes-256-ctr"
}
export declare class DcxStreamCipher {
    algorithm: CipherAlgorightm;
    constructor(algorithm: CipherAlgorightm);
    /**
     * Encrypts the given plaintext stream using the specified algorithm
     * @param key the encryption key
     * @param initVector the initialization vector
     * @param plaintextStream the plaintext stream to encrypt
     * @returns the encrypted stream
     */
    encryptStream(key: Buffer, initVector: Buffer, plaintextStream: Readable): Promise<Readable>;
    /**
     * Decrypts the given cipher stream using the specified algorithm
     * @param key the encryption key
     * @param initVector the initialization vector
     * @param cipherStream the cipher stream to decrypt
     * @returns the decrypted stream
     */
    decryptStream(key: Buffer, initVector: Buffer, cipherStream: Readable): Promise<Readable>;
    /**
     * aes-256-cbc
     * key size: 256 bits (32 bytes)
     * iv size: 128 bits (16 bytes)
     */
    /**
     * Encrypts the given plaintext stream using aes-256-cbc algorithm.
     * @param key the encryption key
     * @param initVector the initialization vector
     * @param plaintextStream the plaintext stream to encrypt
     * @returns the encrypted stream
     */
    static aes256CbcEncryptStream(key: Buffer, initVector: Buffer, plaintextStream: Readable): Promise<Readable>;
    /**
     * Decrypts the given cipher stream using aes-256-cbc algorithm.
     * @param key the encryption key
     * @param initVector the initialization vector
     * @param cipherStream the cipher stream to decrypt
     * @returns the decrypted stream
     */
    static aes256CbcDecryptStream(key: Buffer, initVector: Buffer, cipherStream: Readable): Promise<Readable>;
    /**
     * aes-256-ctr
     * key: 256 bits (32 bytes)
     * iv: 128 bits (16 bytes)
     */
    /**
     * Encrypts the given plaintext stream using aes-256-ctr algorithm.
     * @param key the encryption key
     * @param initVector the initialization vector
     * @param plaintextStream the plaintext stream to encrypt
     * @returns the encrypted stream
     */
    static aes256CtrEncryptStream(key: Buffer, initVector: Buffer, plaintextStream: Readable): Promise<Readable>;
    /**
     * Decrypts the given cipher stream using aes-256-ctr algorithm.
     * @param key the encryption key
     * @param initVector the initialization vector
     * @param cipherStream the cipher stream to decrypt
     * @returns the decrypted stream
     */
    static aes256CtrDecryptStream(key: Buffer, initVector: Buffer, cipherStream: Readable): Promise<Readable>;
}
export declare class DcxCipher extends DcxStreamCipher {
    constructor(algorithm: CipherAlgorightm);
    /**
     * Encrypts the given plaintext message using the specified algorithm
     * @param key the encryption key
     * @param initVector the initialization vector
     * @param plaintext the plaintext message to encrypt
     * @returns the encrypted message in base64 format using the specified algorithm
     */
    encrypt(key: Buffer, initVector: Buffer, plaintext: string): Promise<string>;
    /**
     * Decrypts the given ciphertext message using the specified algorithm
     * @param key the encryption key
     * @param initVector the initialization vector
     * @param ciphertext the encrypted message in base64 format
     * @returns the decrypted message in utf-8 format using the specified algorithm
     */
    decrypt(key: Buffer, initVector: Buffer, ciphertext: string): Promise<string>;
    /**
     *
     * @param key the encryption key
     * @param plaintext the plaintext message
     * @param initVector the initialization vector
     * @returns the encrypted message in base64 format using aes-256-cbc algorithm
     */
    static aes256CbcEncrypt(key: Buffer, initVector: Buffer, plaintext: string): string;
    /**
     *
     * @param key the encryption key
     * @param cipher the encrypted message
     * @param initVector the initialization vector
     * @returns the decrypted message in utf-8 format using aes-256-cbc algorithm
     */
    static aes256CbcDecrypt(key: Buffer, initVector: Buffer, cipher: string): string;
    /**
     *
     * @param key the encryption key
     * @param plaintext the plaintext message
     * @param initVector the initialization vector
     * @returns the encrypted message in base64 format using aes-256-ctr algorithm
     */
    static aes256CtrEncrypt(key: Buffer, initVector: Buffer, plaintext: string): string;
    /**
     *
     * @param key the encryption key
     * @param cipher the encrypted message in format: initVector:cipher
     * @returns the decrypted message in utf-8 format using aes-256-ctr algorithm
     */
    static aes256CtrDecrypt(key: Buffer, initVector: Buffer, cipher: string): string;
}
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