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5f808dfbee
no-issue The service at stripe.ghost.org must know which client_secret to use, either the test, or live one. By encoding a JSON object as the state we are able to pass data through the flow to inform this decision at the end. Note, that we still keep a random value in the state to protect against CSRF attacks.
73 lines
2.3 KiB
JavaScript
73 lines
2.3 KiB
JavaScript
const {Buffer} = require('buffer');
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const {randomBytes} = require('crypto');
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const {URL} = require('url');
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const STATE_PROP = 'stripe-connect-state';
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const liveClientID = 'ca_8LBuZWhYshxF0A55KgCXu8PRTquCKC5x';
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const testClientID = 'ca_8LBum4Ctv3mmJ1oD0ZRmxjdAhNrrBUy3';
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const redirectURI = 'https://stripe.ghost.org';
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/**
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* @function getStripeConnectOAuthUrl
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* @desc Returns a url for the auth endpoint for Stripe Connect, generates state and stores it on the session.
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*
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* @param {(prop: string, val: any) => Promise<void>} setSessionProp - A function to set data on the current session
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* @param {'live' | 'test'} mode - Which stripe mode to set up
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*
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* @returns {Promise<URL>}
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*/
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async function getStripeConnectOAuthUrl(setSessionProp, mode = 'live') {
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const randomState = randomBytes(16).toString('hex');
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const state = Buffer.from(JSON.stringify({
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mode,
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randomState
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})).toString('base64');
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await setSessionProp(STATE_PROP, state);
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const clientID = mode === 'live' ? liveClientID : testClientID;
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const authUrl = new URL('https://connect.stripe.com/oauth/authorize');
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authUrl.searchParams.set('response_type', 'code');
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authUrl.searchParams.set('scope', 'read_write');
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authUrl.searchParams.set('client_id', clientID);
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authUrl.searchParams.set('redirect_uri', redirectURI);
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authUrl.searchParams.set('state', state);
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return authUrl;
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}
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/**
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* @function getStripeConnectTokenData
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* @desc Returns the api keys and the livemode for a Stripe Connect integration after validating the state.
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*
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* @param {string} encodedData - A string encoding the response from Stripe Connect
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* @param {(prop: string) => Promise<any>} getSessionProp - A function to retrieve data from the current session
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*
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* @returns {Promise<{secret_key: string, public_key: string, livemode: boolean}>}
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*/
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async function getStripeConnectTokenData(encodedData, getSessionProp) {
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const data = JSON.parse(Buffer.from(encodedData, 'base64').toString());
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const state = await getSessionProp(STATE_PROP);
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if (state !== data.s) {
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throw new Error('State did not match');
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}
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return {
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public_key: data.p,
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secret_key: data.a,
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livemode: data.l,
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display_name: data.n,
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account_id: data.i
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};
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}
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module.exports = {
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getStripeConnectOAuthUrl,
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getStripeConnectTokenData,
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STATE_PROP
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};
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