/**
 * Input/output structure for ECIES operations.
 */
export type Ecies = {
    /**
     * - Initialization vector (16 bytes)
     */
    iv: Buffer;
    /**
     * - Ephemeral public key (65 bytes)
     */
    ephemPublicKey: Buffer;
    /**
     * - The result of encryption (variable size)
     */
    ciphertext: Buffer;
    /**
     * - Message authentication code (32 bytes)
     */
    mac: Buffer;
};
/**
 * Generate a new valid private key. Will use crypto.randomBytes as source.
 * @return {Buffer} A 32-byte private key.
 * @function
 */
export function generatePrivate(): Buffer;
/**
 * Compute the public key for a given private key.
 * @param {Buffer} privateKey - A 32-byte private key
 * @return {Buffer} A 65-byte public key.
 * @function
 */
export function getPublic(privateKey: Buffer): Buffer;
/**
 * Get compressed version of public key.
 */
export function getPublicCompressed(privateKey: any): Buffer;
/**
 * Create an ECDSA signature.
 * @param {Buffer} privateKey - A 32-byte private key
 * @param {Buffer} msg - The message being signed
 * @return {Buffer} A promise that resolves with the
 * signature and rejects on bad key or message.
 */
export function signSync(privateKey: Buffer, msg: Buffer): Buffer;
/**
 * Create an ECDSA signature.
 * @param {Buffer} privateKey - A 32-byte private key
 * @param {Buffer} msg - The message being signed
 * @return {Promise.<Buffer>} A promise that resolves with the
 * signature and rejects on bad key or message.
 */
export function sign(privateKey: Buffer, msg: Buffer): Promise<Buffer>;
/**
 * Verify an ECDSA signature.
 * @param {Buffer} publicKey - A 65-byte public key
 * @param {Buffer} msg - The message being verified
 * @param {Buffer} sig - The signature
 * @return {null} A promise that resolves on correct signature
 * and rejects on bad key or signature.
 */
export function verifySync(publicKey: Buffer, msg: Buffer, sig: Buffer): null;
/**
 * Verify an ECDSA signature.
 * @param {Buffer} publicKey - A 65-byte public key
 * @param {Buffer} msg - The message being verified
 * @param {Buffer} sig - The signature
 * @return {Promise.<null>} A promise that resolves on correct signature
 * and rejects on bad key or signature.
 */
export function verify(publicKey: Buffer, msg: Buffer, sig: Buffer): Promise<null>;
/**
 * Derive shared secret for given private and public keys.
 * @param {Buffer} privateKeyA - Sender's private key (32 bytes)
 * @param {Buffer} publicKeyB - Recipient's public key (65 bytes)
 * @return {Buffer} The derived shared secret (Px, 32 bytes).
 */
export function deriveSync(privateKeyA: Buffer, publicKeyB: Buffer): Buffer;
/**
 * Derive shared secret for given private and public keys.
 * @param {Buffer} privateKeyA - Sender's private key (32 bytes)
 * @param {Buffer} publicKeyB - Recipient's public key (65 bytes)
 * @return {Promise.<Buffer>} The derived shared secret (Px, 32 bytes).
 */
export function derive(privateKeyA: Buffer, publicKeyB: Buffer): Promise<Buffer>;
/**
 * Input/output structure for ECIES operations.
 * @typedef {Object} Ecies
 * @property {Buffer} iv - Initialization vector (16 bytes)
 * @property {Buffer} ephemPublicKey - Ephemeral public key (65 bytes)
 * @property {Buffer} ciphertext - The result of encryption (variable size)
 * @property {Buffer} mac - Message authentication code (32 bytes)
 */
/**
 * Encrypt message for given recepient's public key.
 * @param {Buffer} publicKeyTo - Recipient's public key (65 bytes)
 * @param {Buffer} msg - The message being encrypted
 * @param {{iv?: Buffer, ephemPrivateKey?: Buffer}} [opts] - You may also
 * specify initialization vector (16 bytes) and ephemeral private key
 * (32 bytes) to get deterministic results.
 * @return {Ecies} - A promise that resolves with the ECIES
 * structure on successful encryption and rejects on failure.
 */
export function encryptSync(publicKeyTo: Buffer, msg: Buffer, opts?: {
    iv?: Buffer;
    ephemPrivateKey?: Buffer;
}): Ecies;
/**
 * Encrypt message for given recepient's public key.
 * @param {Buffer} publicKeyTo - Recipient's public key (65 bytes)
 * @param {Buffer} msg - The message being encrypted
 * @param {{iv?: Buffer, ephemPrivateKey?: Buffer}} [opts] - You may also
 * specify initialization vector (16 bytes) and ephemeral private key
 * (32 bytes) to get deterministic results.
 * @return {Promise.<Ecies>} - A promise that resolves with the ECIES
 * structure on successful encryption and rejects on failure.
 */
export function encrypt(publicKeyTo: Buffer, msg: Buffer, opts?: {
    iv?: Buffer;
    ephemPrivateKey?: Buffer;
}): Promise<Ecies>;
/**
 * Decrypt message using given private key.
 * @param {Buffer} privateKey - A 32-byte private key of recepient of
 * the mesage
 * @param {Ecies} opts - ECIES structure (result of ECIES encryption)
 * @return {Buffer} - A promise that resolves with the
 * plaintext on successful decryption and rejects on failure.
 */
export function decryptSync(privateKey: Buffer, opts: Ecies): Buffer;
/**
 * Decrypt message using given private key.
 * @param {Buffer} privateKey - A 32-byte private key of recepient of
 * the mesage
 * @param {Ecies} opts - ECIES structure (result of ECIES encryption)
 * @return {Promise.<Buffer>} - A promise that resolves with the
 * plaintext on successful decryption and rejects on failure.
 */
export function decrypt(privateKey: Buffer, opts: Ecies): Promise<Buffer>;