import { SignerType } from "./signer";
/**
 * OAuth 1.0a signature generator
 *
 * @example <caption>Setup</caption>
 * let OAuth = require('node-oauth-1.0a');
 * let request = require('request');
 *
 * let oauth = new OAuth({
 *     consumer: {
 *         public: '<consumer key>',
 *         secret: '<consumer secret>',
 *     }
 * });
 * let request_data = {
 *     url: 'https://api.twitter.com/1/statuses/update.json?include_entities=true',
 *     method: 'POST',
 *     data: {
 *         status: 'Hello Ladies + Gentlemen, a signed OAuth request!'
 *     }
 * };
 * let token = {
 *     public: '370773112-GmHxMAgYyLbNEtIKZeRNFsMKPR9EyMZeS9weJAEb',
 *     secret: 'LswwdoUaIvS8ltyTt5jkRh4J50vUPVVHtR2YPi5kE'
 * };
 *
 * @example <caption>Sending in POST body with request library</caption>
 * let formData = Object.assign(
 *     {},
 *     request_data.data,
 *     oauth.authorize(request_data, token)
 * );
 * request({
 *     url: request_data.url,
 *     method: request_data.method,
 *     form: oauth.buildQueryString(formData)
 * }, function(error, response, body) {
 *     // Process data
 * });
 *
 * @example <caption>Sending in Authorization header with request library</caption>
 * request({
 *     url: request_data.url,
 *     method: request_data.method,
 *     form: oauth.buildQueryString(request_data.data),
 *     headers: {
 *         Authorization: oauth.getHeader(request_data, token)
 *     }
 * }, function(error, response, body) {
 *     // Process data
 * });
 *
 */
export declare class OAuth {
    private _opts;
    private _signer;
    /**
     * @param {Object} opts
     * @param {Object} opts.consumer Consumer token (required)
     * @param {string} opts.consumer.public Consumer key (public key)
     * @param {string} opts.consumer.private Consumer secret
     * @param {number} [opts.nonce_length=32] Length of nonce (oauth_nonce)
     * @param {string} [opts.signature_method="HMAC-SHA1"] Signing algorithm
     * Supported algorithms:
     * - `HMAC-SHA1`
     * - `PLAINTEXT`
     * - `HMAC-SHA256`
     *
     * Note that `HMAC-256` is non-standard.
     * @param {string} [opts.version=1.0] OAuth version (oauth_version)
     * @param {boolean} [opts.last_ampersand=true] Whether to append trailing
     * ampersand to signing key
     */
    constructor(opts?: Partial<OAuthOpts>);
    /**
     * Sign a string with key
     * @private
     * @param {string} str String to sign
     * @param {string} key HMAC key
     * @return {string} Signed string in base64 format
     */
    _sign(str: string, key: string): any;
    /**
     * Retrieve a signing algorithm by algorithm name
     * @private
     * @param {SignerType} type Algorithm name
     * @throws {Error} Algorithm is not supported
     * @return {Function} Algorithm implementation
     */
    _getSigner(type: SignerType): Function;
    /**
     * Create OAuth signing data for attaching to request body
     * @param {Object} request
     * @param {string} request.method HTTP Method name (eg. `GET`, `POST`, `PUT`)
     * @param {string} request.url URL
     * @param {Object} request.data Post data as a key, value map
     *
     * @param {Object} [token={}] User token
     * @param {string} [token.key] Token public key
     * @param {string} [token.secret] Token secret key
     *
     * @return {Object} OAuth signing data. You probably want to put this in your POST body
     *
     * @example
     * let request = {
     *     method: 'POST',
     *     url: 'https://api.twitter.com/1.1/statuses/update.json',
     *     data: {
     *         status: 'Hello, world!'
     *     }
     * };
     * let token = {
     *     public: '<user token>',
     *     private: '<user token secret>'
     * };
     * let oauth_data = oauth.authorize(request, token);
     * console.log(oauth_data);
     *
     * @example <caption>Example response</caption>
     * {
     *     "oauth_consumer_key": "xvz1evFS4wEEPTGEFPHBog",
     *     "oauth_nonce": "kYjzVBB8Y0ZFabxSWbWovY3uYSQ2pTgmZeNu2VS4cg",
     *     "oauth_signature_method": "HMAC-SHA1",
     *     "oauth_timestamp": 1318622958,
     *     "oauth_version": "1.0",
     *     "oauth_token": "370773112-GmHxMAgYyLbNEtIKZeRNFsMKPR9EyMZeS9weJAEb",
     *     "oauth_signature": "tnnArxj06cWHq44gCs1OSKk/jLY="
     * }
     */
    authorize(request: RequestOpts, token?: Token): OAuthData;
    /**
     * Create OAuth Authorization header
     * @param {Object} request
     * @param {string} request.method HTTP Method name (eg. `GET`, `POST`, `PUT`)
     * @param {string} request.url URL
     * @param {Object} request.data Post data as a key, value map
     *
     * @param {Object} [token={}] User token
     * @param {string} [token.key] Token public key
     * @param {string} [token.secret] Token secret key
     *
     * @return {string} Authorization header value
     */
    getHeader(request: RequestOpts, token: Token): string;
    /**
     * Format OAuth signing data for sending via HTTP Header
     * @param {Object} oauth_data OAuth signing data as returned from
     * {@link OAuth#authorize}
     * @return {Object} Headers required to sign the request
     * @deprecated This method is preserved for backward compatibility with
     * oauth-1.0a. New implementors should use {@link OAuth#getHeader} instead.
     */
    toHeader(oauth_data: OAuthData): {
        Authorization: string;
    };
    /**
     * Create oauth_signature from request. Usually you probably want to use
     * {@link OAuth#authorize} instead.
     * @param {Object} request
     * @param {string} request.method HTTP Method name (eg. `GET`, `POST`, `PUT`)
     * @param {string} request.url URL
     * @param {Object} request.data Post data as a key, value map
     *
     * @param {string} token signing token
     *
     * @param {Object} oauth_data
     * @param {string} oauth_data.oauth_consumer_key Consumer key
     * @param {string} oauth_data.oauth_nonce Nonce string
     * @param {string} oauth_data.oauth_signature_method Signing algorithm name
     * (only for building signing string, the actual signing algorithm is set by
     * class {@link OAuth#constructor} arguments)
     * @param {number} oauth_data.oauth_timestamp Current time in seconds
     * @param {string} oauth_data.oauth_version OAuth version (should be 1.0)
     *
     * @return {string} Value of oauth_signature field
     */
    getSignature(request: RequestOpts, token: string | undefined, oauth_data: OAuthData): any;
    /**
     * Create new OAuth data
     * @private
     * @param {Object} [token] User token
     * @param {string} token.public Token public key
     * @param  {string|undefined} bodyToHash the body of the rquest (after decompression) as a string
     * @return {Object} OAuth data without oauth_signature
     *
     * @example <caption>Example response</caption>
     * {
     *     "oauth_consumer_key": "xvz1evFS4wEEPTGEFPHBog",
     *     "oauth_nonce": "kYjzVBB8Y0ZFabxSWbWovY3uYSQ2pTgmZeNu2VS4cg",
     *     "oauth_signature_method": "HMAC-SHA1",
     *     "oauth_timestamp": 1318622958,
     *     "oauth_version": "1.0",
     *     "oauth_token": "370773112-GmHxMAgYyLbNEtIKZeRNFsMKPR9EyMZeS9weJAEb",
     * }
     */
    _getOAuthData(token: Token, bodyToHash?: string): OAuthData;
    /**
     * Get the body hash for the request according to
     * [OAuth Request Body Hash]{@link http://web.archive.org/web/20160413130001/https://oauth.googlecode.com/svn/spec/ext/body_hash/1.0/oauth-bodyhash.html}  // tslint:disable-line
     * @param {Object} [token] User token
     * @param {string} token.secret Token secret key
     * @param  {string} bodyToHash the body of the rquest (after decompression) as a string
     * @return {string} the hash of the body, using the same algorithm as for signing the request
     */
    _getBodyHash(bodyToHash: string): string;
    /**
     * Build authorization string to sign.
     *
     * An authorization string composes of HTTP method name, base URL and
     * parameters (both request parameters and OAuth data)
     * @private
     * @param {Object} request Request object
     * @param {Object} oauth_data OAuth parameters
     * @return {string} Authorization string
     */
    _getBaseString(request: RequestOpts, oauth_data: any): string;
    /**
     * Build a query string similar to {@link querystring.encode}, but
     * escape things correctly per OAuth spec
     *
     * @param  {Object} data Object to encode as query string
     * @return {string} Query string object
     */
    buildQueryString(data: any): string;
    /**
     * Build signing key.
     *
     * A signing key composes of consumer secret and,
     * optionally, user token secret.
     *
     * This method will append trailing ampersand when `token_secret` is unset
     * if `last_ampersand` constructor option is set.
     *
     * @private
     * @param  {string} [token_secret] User token secret
     * @return {string} Signing Key
     */
    _getSigningKey(token_secret?: string): string;
    /**
     * Create nonce.
     *
     * Nonce is a random string to prevent replaying of requests.
     *
     * Default nonce length is 32 characters, and can be specified by
     * `nonce_length` constructor option.
     *
     * @private
     * @return {string} Nonce string
     */
    _getNonce(): string;
    /**
     * Create timestamp from current time
     * @private
     * @return {number} Current time in seconds
     */
    _getTimeStamp(): number;
}
export default OAuth;
export interface OAuthOpts {
    consumer: OAuthConsumer;
    nonce_length: number;
    signature_method: SignerType;
    version: string;
    last_ampersand: boolean;
    parameter_separator: string;
}
export interface OAuthConsumer {
    public: string;
    secret: string;
}
export interface RequestOpts {
    method: string;
    url: string;
    includeBodyHash?: boolean;
    data?: any;
}
export interface OAuthData {
    oauth_consumer_key: string;
    oauth_nonce: string;
    oauth_signature_method: SignerType;
    oauth_timestamp: number;
    oauth_version: string;
    oauth_signature?: string;
    oauth_token?: string;
    oauth_body_hash?: string;
}
export interface Token {
    key?: string;
    public?: string;
    secret?: string;
}