OpenID Connect 1.0 Provider Metadata Retrieval Functions

This module contains simple OIDC provider metadata retrieval functions usable by Deno. The intent is to retrieve all standard OIDC 1.0 metadata so that another OAuth 2 library can be initialized with the right endpoints. This module has no external runtime dependencies.

Functions

retrieveRawProviderMetadata(issuer, options?)

Retrieve the raw OIDC 1.0 provider metadata for a given issuer URL. Calls the standard metadata endpoint for the issuer and returns the object retrieved with no further validation or transformation.

Parameters

• issuer: string | URL
• options?: Readonly<OidcDiscoveryOptions>

Returns

Promise<RawProviderMetadata>

retrieveProviderMetadata(issuer, options?)

Retrieve the OIDC 1.0 provider metadata for a given issuer URL and parse it into ProviderMetadata. Calls the standard metadata endpoint for the issuer then does basic parsing and validation to ensure that the metadata is valid.

Parameters

• issuer: string | URL
• options?: Readonly<OidcDiscoveryOptions>

Returns

Promise<ProviderMetadata>

Examples

Using with the oauth2_client module

An example program that uses the oauth2_client module to perform a client credentials grant and retrieve the access token for a specific client ID then prints the token and information to the console:

import { retrieveProviderMetadata } from "https://deno.land/x/oidc_discovery/mod.ts";
import { OAuth2Client } from "https://deno.land/x/oauth2_client@v1.0.2/mod.ts";

const issuer = Deno.env.get("ISSUER");
const clientId = Deno.env.get("CLIENT_ID");
const clientSecret = Deno.env.get("CLIENT_SECRET");

const metadata = await retrieveProviderMetadata(issuer!);

const client = new OAuth2Client({
    clientId: clientId!,
    clientSecret: clientSecret,
    authorizationEndpointUri: metadata.authorizationEndpoint.href,
    tokenUri: metadata.tokenEndpoint.href,
});

const tokens = await client.clientCredentials.getToken();

console.log(tokens);

Dumping the issuer metadata response for a provider

import { retrieveRawProviderMetadata } from "https://deno.land/x/oidc_discovery/mod.ts";

if(Deno.args.length == 0) {
    console.error("issuer URL(s) required!")
    console.error();
    console.error("USAGE:");
    console.error("\tdeno run --allow-net get_issuer_metadata.ts <issuer URL>...");
}

for(const issuer of Deno.args) {
    const metadata = await retrieveRawProviderMetadata(issuer);
    console.log(JSON.stringify(metadata, null, 2));
    console.log();
}

Development

A number of tasks are set up in the Deno project to make development easier:

• test -- Runs the tests (in the /tests directory).
• fmt -- Runs deno fmt on all the source code.
• check -- Runs deno check on all the source code.
• lint -- Runs deno lint on all the source code.