Cosmos-Server/src/authorizationserver/oauth2.go

package authorizationserver

import (
	"crypto/rand"
	"crypto/rsa"
	"github.com/ory/fosite"
	"time"
	"net/http"
	"os"

	"github.com/ory/fosite/compose"
	"github.com/ory/fosite/handler/openid"
	"github.com/ory/fosite/storage"
	"github.com/ory/fosite/token/jwt"

	"github.com/azukaar/cosmos-server/src/utils"

	"github.com/gorilla/mux"
)

func RegisterHandlers(wellKnown *mux.Router, userRouter *mux.Router, serverRouter *mux.Router) {
	// Set up oauth2 endpoints. You could also use gorilla/mux or any other router.
	userRouter.HandleFunc("/auth", authEndpoint)
	serverRouter.HandleFunc("/token", tokenEndpoint)

	// user infos
	serverRouter.HandleFunc("/userinfo", userInfosEndpoint)

	// revoke tokens
	serverRouter.HandleFunc("/revoke", revokeEndpoint)
	serverRouter.HandleFunc("/introspect", introspectionEndpoint)

	// public endpoints
	wellKnown.HandleFunc("/openid-configuration", discoverEndpoint)
	wellKnown.HandleFunc("/jwks.json", jwksEndpoint)


	store.Clients["gitea"] = &fosite.DefaultClient{
		ID:             "gitea",
		Secret:         []byte(`$2a$10$IxMdI6d.LIRZPpSfEwNoeu4rY3FhDREsxFJXikcgdRRAStxUlsuEO`),            // = "foobar"
		RedirectURIs:   []string{"http://localhost:3000/user/oauth2/Cosmos/callback"},
		Scopes:         []string{"openid", "email", "profile"},
		ResponseTypes:  []string{"id_token", "code", "token", "id_token token", "code id_token", "code token", "code id_token token"},
		GrantTypes:     []string{"implicit", "refresh_token", "authorization_code", "password", "client_credentials"},
	}

	store.Clients["my-client"] = &fosite.DefaultClient{
		ID:             "my-client",
		Secret:         []byte(`$2a$10$IxMdI6d.LIRZPpSfEwNoeu4rY3FhDREsxFJXikcgdRRAStxUlsuEO`),            // = "foobar"
		RotatedSecrets: [][]byte{[]byte(`$2y$10$X51gLxUQJ.hGw1epgHTE5u0bt64xM0COU7K9iAp.OFg8p2pUd.1zC`)}, // = "foobaz",
		RedirectURIs:   []string{"http://localhost:3846/callback"},
		ResponseTypes:  []string{"id_token", "code", "token", "id_token token", "code id_token", "code token", "code id_token token"},
		GrantTypes:     []string{"implicit", "refresh_token", "authorization_code", "password", "client_credentials"},
		Scopes:         []string{"fosite", "openid", "photos", "offline"},
	}

	store.Clients["minio"] = &fosite.DefaultClient{
		ID:             "minio",
		Secret:         []byte(`$2a$10$IxMdI6d.LIRZPpSfEwNoeu4rY3FhDREsxFJXikcgdRRAStxUlsuEO`),            // = "foobar"
		RedirectURIs:   []string{"http://localhost:9090/oauth_callback"},
		Scopes:         []string{"openid", "email", "profile", "groups"},
		ResponseTypes:  []string{"id_token", "code", "token", "id_token token", "code id_token", "code token", "code id_token token"},
		GrantTypes:     []string{"implicit", "refresh_token", "authorization_code", "password", "client_credentials"},
	}

}

// fosite requires four parameters for the server to get up and running:
// 1. config - for any enforcement you may desire, you can do this using `compose.Config`. You like PKCE, enforce it!
// 2. store - no auth service is generally useful unless it can remember clients and users.
//    fosite is incredibly composable, and the store parameter enables you to build and BYODb (Bring Your Own Database)
// 3. secret - required for code, access and refresh token generation.
// 4. privateKey - required for id/jwt token generation.
var (
	// Check the api documentation of `compose.Config` for further configuration options.
	config = &fosite.Config{
		AccessTokenLifespan: time.Minute * 30,
		GlobalSecret:        secret,
		// ...
	}

	// This is the example storage that contains:
	// * an OAuth2 Client with id "my-client" and secrets "foobar" and "foobaz" capable of all oauth2 and open id connect grant and response types.
	// * a User for the resource owner password credentials grant type with username "peter" and password "secret".
	//
	// You will most likely replace this with your own logic once you set up a real world application.
	store = storage.NewMemoryStore()

	// This secret is used to sign authorize codes, access and refresh tokens.
	// It has to be 32-bytes long for HMAC signing. This requirement can be configured via `compose.Config` above.
	// In order to generate secure keys, the best thing to do is use crypto/rand:
	//
	// ```
	// package main
	//
	// import (
	//	"crypto/rand"
	//	"encoding/hex"
	//	"fmt"
	// )
	//
	// func main() {
	//	var secret = make([]byte, 32)
	//	_, err := rand.Read(secret)
	//	if err != nil {
	//		panic(err)
	//	}
	// }
	// ```
	//
	// If you require this to key to be stable, for example, when running multiple fosite servers, you can generate the
	// 32byte random key as above and push it out to a base64 encoded string.
	// This can then be injected and decoded as the `var secret []byte` on server start.
	secret = []byte("some-cool-secret-that-is-32bytes")

	// privateKey is used to sign JWT tokens. The default strategy uses RS256 (RSA Signature with SHA-256)
	AuthPrivateKey, _ = rsa.GenerateKey(rand.Reader, 2048)
)


// Build a fosite instance with all OAuth2 and OpenID Connect handlers enabled, plugging in our configurations as specified above.
var oauth2 = compose.ComposeAllEnabled(config, store, AuthPrivateKey)

// A session is passed from the `/auth` to the `/token` endpoint. You probably want to store data like: "Who made the request",
// "What organization does that person belong to" and so on.
// For our use case, the session will meet the requirements imposed by JWT access tokens, HMAC access tokens and OpenID Connect
// ID Tokens plus a custom field

// newSession is a helper function for creating a new session. This may look like a lot of code but since we are
// setting up multiple strategies it is a bit longer.
// Usually, you could do:
//
//  session = new(fosite.DefaultSession)
func newSession(user string, req *http.Request) *openid.DefaultSession {
	// get hostname from request
	hostname := req.Host

	// external request
	if hostname == utils.GetMainConfig().HTTPConfig.Hostname {
		if utils.IsHTTPS {
			hostname = "https://" + hostname
		} else {
			hostname = "http://" + hostname
		}
	} else if hostname == os.Getenv("HOSTNAME") {
		hostname = "http://" + hostname
	} else {
		utils.Error("Invalid hostname for OpenID request: " + hostname, nil)
		return nil
	}

	return &openid.DefaultSession{
		Claims: &jwt.IDTokenClaims{
			Issuer:      hostname,
			Subject:     user,
			// Audience:    []string{"https://my-client.my-application.com"},
			ExpiresAt:   time.Now().Add(time.Hour * 6),
			IssuedAt:    time.Now(),
			RequestedAt: time.Now(),
			AuthTime:    time.Now(),
		},
		Headers: &jwt.Headers{
			Extra: map[string]interface{}{
				"kid": "1",
			},
		},
	}
}