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fix: implement refresh token flow (#1136)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,142 @@ | ||
| import { JWTPayload, createRemoteJWKSet, decodeJwt, jwtVerify } from "jose"; | ||
| import { NextApiRequestCookies } from "next/dist/server/api-utils"; | ||
| import type { NextRequest } from "next/server"; | ||
| import urlJoin from "url-join"; | ||
| import { AuthEdgeConfigOAuth2, OAuthTokenResponse, OAuthTokenResponseSchema } from "./types"; | ||
|
|
||
| interface TokenInfo { | ||
| access_token: string; | ||
| exp?: number; | ||
| refresh_token?: string; | ||
| } | ||
|
|
||
| export class OAuth2Client { | ||
| private readonly clientId: string; | ||
| private readonly clientSecret: string; | ||
| private readonly environment: string; | ||
| private readonly scope: string | undefined; | ||
| private readonly jwks: string | undefined; | ||
|
|
||
| constructor( | ||
| config: AuthEdgeConfigOAuth2, | ||
| private readonly redirect_uri?: string, | ||
| ) { | ||
| this.clientId = config.clientId; | ||
| this.clientSecret = config.clientSecret; | ||
| this.environment = config.environment; | ||
| this.scope = config.scope; | ||
| this.jwks = config.jwks; | ||
| } | ||
|
|
||
| public async getToken(code: string): Promise<OAuthTokenResponse> { | ||
| const form = new FormData(); | ||
| form.append("code", code); | ||
| form.append("client_secret", this.clientSecret); | ||
| form.append("grant_type", "authorization_code"); | ||
| form.append("client_id", this.clientId); | ||
| if (this.redirect_uri != null) { | ||
| form.append("redirect_uri", this.redirect_uri); | ||
| } | ||
|
|
||
| const response = await fetch(urlJoin(this.environment, "/token"), { | ||
| method: "POST", | ||
| body: form, | ||
| }); | ||
|
|
||
| if (response.ok) { | ||
| return OAuthTokenResponseSchema.parse(await response.json()); | ||
| } | ||
| throw new Error(`Failed to get OAuth token: ${response.status} ${await response.text()}`); | ||
| } | ||
|
|
||
| public async refreshToken(refresh_token: string): Promise<OAuthTokenResponse> { | ||
| const form = new FormData(); | ||
| form.append("refresh_token", refresh_token); | ||
| form.append("client_secret", this.clientSecret); | ||
| form.append("grant_type", "refresh_token"); | ||
| form.append("client_id", this.clientId); | ||
| if (this.redirect_uri != null) { | ||
| form.append("redirect_uri", this.redirect_uri); | ||
| } | ||
|
|
||
| const response = await fetch(urlJoin(this.environment, "/token"), { | ||
| method: "POST", | ||
| body: form, | ||
| }); | ||
|
|
||
| if (response.ok) { | ||
| return OAuthTokenResponseSchema.parse(await response.json()); | ||
| } | ||
| throw new Error(`Failed to refresh OAuth token: ${response.status} ${await response.text()}`); | ||
| } | ||
|
|
||
| public getRedirectUrl(state?: string): string { | ||
| const url = new URL(urlJoin(this.environment, "/auth")); | ||
| url.searchParams.set("response_type", "code"); | ||
| url.searchParams.set("client_id", this.clientId); | ||
| // if (this.redirect_uri != null) { | ||
| // url.searchParams.set("redirect_uri", encodeURIComponent(this.redirect_uri)); | ||
| // } | ||
| if (state != null) { | ||
| url.searchParams.set("state", state); | ||
| } | ||
| if (this.scope != null) { | ||
| url.searchParams.set("scope", encodeURIComponent(this.scope).replaceAll(/%20/g, "+")); | ||
| } | ||
| return url.toString(); | ||
| } | ||
|
|
||
| public async decode(access_token: string): Promise<JWTPayload> { | ||
| if (this.jwks == null) { | ||
| return decodeJwt(access_token); | ||
| } | ||
| const JWKS = createRemoteJWKSet(new URL(this.jwks)); | ||
| const { payload } = await jwtVerify(access_token, JWKS); | ||
| return payload; | ||
| } | ||
|
|
||
| public async safeDecode(access_token: string): Promise<JWTPayload | null> { | ||
| try { | ||
| return await this.decode(access_token); | ||
| } catch (e) { | ||
| // eslint-disable-next-line no-console | ||
| console.error(e); | ||
| return null; | ||
| } | ||
| } | ||
|
|
||
| public async getOrRefreshAccessTokenEdge(cookies: NextRequest["cookies"]): Promise<TokenInfo | undefined> { | ||
| const access_token = cookies.get("access_token")?.value; | ||
| const refresh_token = cookies.get("refresh_token")?.value; | ||
| return this.getOrRefreshAccessToken(access_token, refresh_token); | ||
| } | ||
|
|
||
| public async getOrRefreshAccessTokenNode(cookies: NextApiRequestCookies): Promise<TokenInfo | undefined> { | ||
| const access_token = cookies.access_token; | ||
| const refresh_token = cookies.refresh_token; | ||
| return this.getOrRefreshAccessToken(access_token, refresh_token); | ||
| } | ||
|
|
||
| private async getOrRefreshAccessToken( | ||
| access_token: string | undefined, | ||
| refresh_token: string | undefined, | ||
| ): Promise<TokenInfo | undefined> { | ||
| if (access_token != null) { | ||
| let payload = await this.safeDecode(access_token); | ||
|
|
||
| if (payload == null && refresh_token != null) { | ||
| const refreshed = await this.refreshToken(refresh_token); | ||
| access_token = refreshed.access_token; | ||
| refresh_token = refreshed.refresh_token; | ||
| payload = await this.safeDecode(access_token); | ||
| } | ||
|
|
||
| if (payload == null) { | ||
| return undefined; | ||
| } | ||
|
|
||
| return { access_token, exp: payload.exp, refresh_token }; | ||
| } | ||
| return undefined; | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,92 @@ | ||
| import type { NextApiRequestCookies } from "next/dist/server/api-utils"; | ||
| import type { NextRequest } from "next/server"; | ||
| import { OAuth2Client } from "./OAuth2Client"; | ||
| import { getAuthEdgeConfig } from "./getAuthEdgeConfig"; | ||
|
|
||
| interface APIKeyInjectionConfigDisabled { | ||
| enabled: false; | ||
| } | ||
| interface APIKeyInjectionConfigEnabledUnauthorized { | ||
| enabled: true; | ||
| authenticated: false; | ||
| url: string; | ||
| } | ||
| interface APIKeyInjectionConfigEnabledAuthorized { | ||
| enabled: true; | ||
| authenticated: true; | ||
| access_token: string; | ||
| refresh_token?: string; | ||
| exp?: number; | ||
| } | ||
|
|
||
| export type APIKeyInjectionConfig = | ||
| | APIKeyInjectionConfigDisabled | ||
| | APIKeyInjectionConfigEnabledUnauthorized | ||
| | APIKeyInjectionConfigEnabledAuthorized; | ||
|
|
||
| export async function getAPIKeyInjectionConfig( | ||
| domain: string, | ||
| cookies?: NextRequest["cookies"], | ||
| state?: string, | ||
| ): Promise<APIKeyInjectionConfig> { | ||
| const config = await getAuthEdgeConfig(domain); | ||
| if (config?.type === "oauth2" && config["api-key-injection-enabled"]) { | ||
| const client = new OAuth2Client(config, `https://${domain}/api/auth/callback`); | ||
| const tokens = cookies != null ? await client.getOrRefreshAccessTokenEdge(cookies) : undefined; | ||
|
|
||
| if (tokens != null) { | ||
| return { | ||
| enabled: true, | ||
| authenticated: true, | ||
| access_token: tokens.access_token, | ||
| refresh_token: tokens.refresh_token, | ||
| exp: tokens.exp, | ||
| }; | ||
| } | ||
|
|
||
| const url = client.getRedirectUrl(state); | ||
| if (url != null) { | ||
| return { | ||
| enabled: true, | ||
| authenticated: false, | ||
| url, | ||
| }; | ||
| } | ||
| } | ||
| return { | ||
| enabled: false, | ||
| }; | ||
| } | ||
| export async function getAPIKeyInjectionConfigNode( | ||
| domain: string, | ||
| cookies?: NextApiRequestCookies, | ||
| state?: string, | ||
| ): Promise<APIKeyInjectionConfig> { | ||
| const config = await getAuthEdgeConfig(domain); | ||
| if (config?.type === "oauth2" && config["api-key-injection-enabled"]) { | ||
| const client = new OAuth2Client(config, `https://${domain}/api/auth/callback`); | ||
| const tokens = cookies != null ? await client.getOrRefreshAccessTokenNode(cookies) : undefined; | ||
|
|
||
| if (tokens != null) { | ||
| return { | ||
| enabled: true, | ||
| authenticated: true, | ||
| access_token: tokens.access_token, | ||
| refresh_token: tokens.refresh_token, | ||
| exp: tokens.exp, | ||
| }; | ||
| } | ||
|
|
||
| const url = client.getRedirectUrl(state); | ||
| if (url != null) { | ||
| return { | ||
| enabled: true, | ||
| authenticated: false, | ||
| url, | ||
| }; | ||
| } | ||
| } | ||
| return { | ||
| enabled: false, | ||
| }; | ||
| } |
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