Fixed token fetch from IDP

server: fix error reporting and logic for /keys handler

.github/workflows/build_release.yml

@@ -4,6 +4,7 @@
 name: Release with goreleaser
 
 on:
+  workflow_dispatch:
   push:
     tags:
       - v*
@@ -52,7 +53,3 @@ jobs:
           echo "fs.writeFileSync('digest.txt', firstNonNullDigest);" >> process.js
           node process.js
           echo "digest=$(cat digest.txt)" >> $GITHUB_OUTPUT
-      - name: Attest opaal binary
-        uses: github-early-access/generate-build-provenance@main
-        with:
-          subject-path: opaal

.goreleaser.yaml

@@ -53,4 +53,4 @@ changelog:
 #   github:
 #   name_template: "{{.Version}}"
 #   prerelease: auto
-#   mode: append
+#   mode: append

README.md

@@ -28,12 +28,39 @@ These commands will create a default config, then start the login process. Maybe
 - [Gitlab](https://about.gitlab.com/)
 - [Forgejo](https://forgejo.org/) (fork of Gitea)
 
+The tool is now able to run an internal example identity provider using the `serve` subcommand.
+
+```bash
+./opaal serve --config config.yaml
+```
+
+This will start a server that allows you to login with `opaal` itself. Currently, it is only has one example user to use for log in. The username and password combination is `ochami:ochami`. It uses the same config file as before with additional parameters set in the config file:
+
+```yaml
+server:
+  ...
+  issuer:
+    host: "127.0.0.1"
+    port: 3332
+
+authentication:
+  clients:
+    - id: "ochami"
+        secret: "ochami"
+        name: "ochami"
+        issuer: "http://127.0.0.1:3332"
+        redirect-uris:
+          - "http://127.0.0.1:3333/oidc/callback"
+```
+
+See the [Configuration](#configuration) section for the entire config file.
+
 ### Authorization Code Flow
 
 `opaal` has the ability to completely execute the authorization code and return an access token from an authorization server using social sign-in. The process works as follows:
 
 1. Click the authorization link or navigate to the hosted endpoint in your browser (127.0.0.1:3333 by default)
-	- Alternatively, you can use a link produced 
+	- Alternatively, you can use a link produced
 2. Login using identity provider credentials
 3. Authorize application registered with IdP
 4. IdP redirects to specified redirect URI
@@ -41,27 +68,29 @@ These commands will create a default config, then start the login process. Maybe
 	- ...verifying the authenticity of the ID token from identity provider with its JWKS
 	- ...adds itself as a trusted issuer to the authorization server with it's own JWK
 	- ...creates a new signed JWT to send to the authorization server with the `urn:ietf:params:oauth:grant-type:jwt-bearer` grant type
-	- ... returns an access token that can be used by services protected by the authorization server 
+	- ... returns an access token that can be used by services protected by the authorization server
 
 *After receiving the ID token, the rest of the flow requires the appropriate URLs to be set to continue.
 
 ### Client Credentials Flow
 
-`opaal` also has
-
 
 ## Configuration
 
 Here is an example configuration file:
 
 ```yaml
-version: "0.0.1"
+version: "0.3.2"
 server:
   host: "127.0.0.1"
   port: 3333
   callback: "/oidc/callback"
+  issuer:
+    host: "127.0.0.1"
+    port: 3332
 
 providers:
+  opaal: "https://127.0.0.1:3332"
   forgejo: "http://127.0.0.1:3000"
 
 authentication:
@@ -83,7 +112,17 @@ authentication:
     client-credentials:
 
 authorization:
-  urls:
+  token:
+    forwarding: false
+    refresh: false
+    duration: 16h
+    scope:
+      - smd.read
+  key-path: ./keys
+  endpoints:
+    issuer: http://127.0.0.1:4444
+    config: http://127.0.0.1:4444/.well-known/openid-configuration
+    jwks: http://127.0.0.1:4444/.well-known/jwks.json
     #identities: http://127.0.0.1:4434/admin/identities
     trusted-issuers: http://127.0.0.1:4445/admin/trust/grants/jwt-bearer/issuers
     login: http://127.0.0.1:4433/self-service/login/api
@@ -91,17 +130,14 @@ authorization:
     authorize: http://127.0.0.1:4444/oauth2/auth
     register: http://127.0.0.1:4444/oauth2/register
     token: http://127.0.0.1:4444/oauth2/token
-  clients:
-    - id: bss
-      secret: IAMBSS
 
 
 options:
-  decode-id-token: true
-  decode-access-token: true
   run-once: true
   open-browser: false
-  forward: false
+  flow: authorization_code
+  cache-only: false
+  verbose: true
 ```
 
 ## Troubleshooting

cmd/login.go

@@ -2,12 +2,9 @@ package cmd
 
 import (
 	opaal "davidallendj/opaal/internal"
-	cache "davidallendj/opaal/internal/cache/sqlite"
 	"davidallendj/opaal/internal/oauth"
-	"davidallendj/opaal/internal/oidc"
 	"fmt"
 	"os"
-	"slices"
 
 	"github.com/spf13/cobra"
 )
@@ -25,68 +22,68 @@ var loginCmd = &cobra.Command{
 	Run: func(cmd *cobra.Command, args []string) {
 		for {
 			// try and find client with valid identity provider config
-			var provider *oidc.IdentityProvider
+			// var provider *oidc.IdentityProvider
-			if target != "" {
+			// if target != "" {
-				// only try to use client with name give
+			// 	// only try to use client with name give
-				index := slices.IndexFunc(config.Authentication.Clients, func(c oauth.Client) bool {
+			// 	index := slices.IndexFunc(config.Authentication.Clients, func(c oauth.Client) bool {
-					return target == c.Name
+			// 		return target == c.Name
-				})
+			// 	})
-				if index < 0 {
+			// 	if index < 0 {
-					fmt.Printf("could not find the target client listed by name")
+			// 		fmt.Printf("could not find the target client listed by name")
-					os.Exit(1)
+			// 		os.Exit(1)
-				}
+			// 	}
-				client := config.Authentication.Clients[index]
+			// 	client := config.Authentication.Clients[index]
-				_, err := cache.GetIdentityProvider(config.Options.CachePath, client.Issuer)
+			// 	_, err := cache.GetIdentityProvider(config.Options.CachePath, client.Issuer)
-				if err != nil {
+			// 	if err != nil {
 
-				}
+			// 	}
 
-			} else if targetIndex >= 0 {
+			// } else if targetIndex >= 0 {
-				// only try to use client by index
+			// 	// only try to use client by index
-				targetCount := len(config.Authentication.Clients) - 1
+			// 	targetCount := len(config.Authentication.Clients) - 1
-				if targetIndex > targetCount {
+			// 	if targetIndex > targetCount {
-					fmt.Printf("target index out of range (found %d)", targetCount)
+			// 		fmt.Printf("target index out of range (found %d)", targetCount)
-				}
+			// 	}
-				client := config.Authentication.Clients[targetIndex]
+			// 	client := config.Authentication.Clients[targetIndex]
-				_, err := cache.GetIdentityProvider(config.Options.CachePath, client.Issuer)
+			// 	_, err := cache.GetIdentityProvider(config.Options.CachePath, client.Issuer)
-				if err != nil {
+			// 	if err != nil {
 
-				}
+			// 	}
-			} else {
+			// } else {
-				for _, c := range config.Authentication.Clients {
+			// 	for _, c := range config.Authentication.Clients {
-					// try to get identity provider info locally first
+			// 		// try to get identity provider info locally first
-					_, err := cache.GetIdentityProvider(config.Options.CachePath, c.Issuer)
+			// 		_, err := cache.GetIdentityProvider(config.Options.CachePath, c.Issuer)
-					if err != nil && !config.Options.CacheOnly {
+			// 		if err != nil && !config.Options.CacheOnly {
-						fmt.Printf("fetching config from issuer: %v\n", c.Issuer)
+			// 			fmt.Printf("fetching config from issuer: %v\n", c.Issuer)
-						// try to get info remotely by fetching
+			// 			// try to get info remotely by fetching
-						provider, err = oidc.FetchServerConfig(c.Issuer)
+			// 			provider, err = oidc.FetchServerConfig(c.Issuer)
-						if err != nil {
+			// 			if err != nil {
-							fmt.Printf("failed to fetch server config: %v\n", err)
+			// 				fmt.Printf("failed to fetch server config: %v\n", err)
-							continue
+			// 				continue
-						}
+			// 			}
-						client = c
+			// 			client = c
-						// fetch the provider's JWKS
+			// 			// fetch the provider's JWKS
-						err := provider.FetchJwks()
+			// 			err := provider.FetchJwks()
-						if err != nil {
+			// 			if err != nil {
-							fmt.Printf("failed to fetch JWKS: %v\n", err)
+			// 				fmt.Printf("failed to fetch JWKS: %v\n", err)
-						}
+			// 			}
-						break
+			// 			break
-					}
+			// 		}
-					// only test the first if --run-all flag is not set
+			// 		// only test the first if --run-all flag is not set
-					if !config.Authentication.TestAllClients {
+			// 		if !config.Authentication.TestAllClients {
-						fmt.Printf("stopping after first test...\n\n\n")
+			// 			fmt.Printf("stopping after first test...\n\n\n")
-						break
+			// 			break
-					}
+			// 		}
-				}
+			// 	}
-			}
+			// }
 
-			if provider == nil {
+			// if provider == nil {
-				fmt.Printf("failed to retrieve provider config\n")
+			// 	fmt.Printf("failed to retrieve provider config\n")
-				os.Exit(1)
+			// 	os.Exit(1)
-			}
+			// }
 
 			// start the listener
-			err := opaal.Login(&config, &client, provider)
+			err := opaal.Login(&config)
 			if err != nil {
 				fmt.Printf("%v\n", err)
 				os.Exit(1)
@@ -115,3 +112,13 @@ func init() {
 	loginCmd.MarkFlagsMutuallyExclusive("target.name", "target.index")
 	rootCmd.AddCommand(loginCmd)
 }
+
+func MakeButton(url string, text string) string {
+	// check if we have http:// a
+	html := "<input type=\"button\" "
+	html += "class=\"button\" "
+	html += fmt.Sprintf("onclick=\"window.location.href='%s';\" ", url)
+	html += fmt.Sprintf("value=\"%s\"", text)
+	return html
+	// return "<a href=\"" + url + "\"> " + text + "</a>"
+}

cmd/serve.go

@@ -0,0 +1,40 @@
+package cmd
+
+import (
+	opaal "davidallendj/opaal/internal"
+	"davidallendj/opaal/internal/oidc"
+	"errors"
+	"fmt"
+	"net/http"
+
+	"github.com/spf13/cobra"
+)
+
+var (
+	endpoints oidc.Endpoints
+)
+
+var serveCmd = &cobra.Command{
+	Use:   "serve",
+	Short: "Start an simple, bare minimal identity provider server",
+	Long:  "The built-in identity provider is not (nor meant to be) a complete OIDC implementation and behaves like an external IdP",
+	Run: func(cmd *cobra.Command, args []string) {
+		s := opaal.NewServerWithConfig(&config)
+		// FIXME: change how the server address is set with `NewServerWithConfig`
+		s.Server.Addr = fmt.Sprintf("%s:%d", s.Issuer.Host, s.Issuer.Port)
+		err := s.StartIdentityProvider()
+		if errors.Is(err, http.ErrServerClosed) {
+			fmt.Printf("Identity provider server closed.\n")
+		} else if err != nil {
+			fmt.Printf("failed to start server: %v", err)
+		}
+	},
+}
+
+func init() {
+	serveCmd.Flags().StringVar(&endpoints.Authorization, "endpoints.authorization", "", "set the authorization endpoint for the identity provider")
+	serveCmd.Flags().StringVar(&endpoints.Token, "endpoints.token", "", "set the token endpoint for the identity provider")
+	serveCmd.Flags().StringVar(&endpoints.JwksUri, "endpoints.jwks_uri", "", "set the JWKS endpoints for the identity provider")
+
+	rootCmd.AddCommand(serveCmd)
+}

go.mod

@@ -3,7 +3,7 @@ module davidallendj/opaal
 go 1.22.0
 
 require (
-	github.com/davidallendj/go-utils v0.0.0-20240310194826-5a1300f3bcbf
+	github.com/davidallendj/go-utils v0.0.0-20240417195221-95765f3b9bad
 	github.com/go-chi/chi/v5 v5.0.12
 	github.com/google/uuid v1.6.0
 	github.com/jmoiron/sqlx v1.3.5
@@ -11,12 +11,12 @@ require (
 	github.com/mattn/go-sqlite3 v1.14.22
 	github.com/nikolalohinski/gonja/v2 v2.2.0
 	github.com/spf13/cobra v1.8.0
-	golang.org/x/net v0.22.0
+	golang.org/x/net v0.24.0
 	gopkg.in/yaml.v3 v3.0.1
 )
 
 require (
-	github.com/decred/dcrd/dcrec/secp256k1/v4 v4.2.0 // indirect
+	github.com/decred/dcrd/dcrec/secp256k1/v4 v4.3.0 // indirect
 	github.com/dustin/go-humanize v1.0.1 // indirect
 	github.com/go-logr/logr v1.3.0 // indirect
 	github.com/goccy/go-json v0.10.2 // indirect
@@ -39,8 +39,8 @@ require (
 	github.com/segmentio/asm v1.2.0 // indirect
 	github.com/sirupsen/logrus v1.9.3 // indirect
 	github.com/spf13/pflag v1.0.5 // indirect
-	golang.org/x/crypto v0.21.0 // indirect
+	golang.org/x/crypto v0.22.0 // indirect
-	golang.org/x/exp v0.0.0-20240222234643-814bf88cf225 // indirect
+	golang.org/x/exp v0.0.0-20240416160154-fe59bbe5cc7f // indirect
-	golang.org/x/sys v0.18.0 // indirect
+	golang.org/x/sys v0.19.0 // indirect
 	golang.org/x/text v0.14.0 // indirect
 )

go.sum

@@ -8,10 +8,10 @@ github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ3
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/davidallendj/go-utils v0.0.0-20240310194826-5a1300f3bcbf h1:gY89rDLnc+70S0JcyHoPGU+XFpMwY1iVYNQzdC/qAHc=
+github.com/davidallendj/go-utils v0.0.0-20240417195221-95765f3b9bad h1:WODRnqFS2CZfraXy7Nvh5qekM42/L5kvLoLMqNr50e8=
-github.com/davidallendj/go-utils v0.0.0-20240310194826-5a1300f3bcbf/go.mod h1:kiv3jEnBbeueMNNJclaMMJULL/tjqJ6wc136d+uxqSs=
+github.com/davidallendj/go-utils v0.0.0-20240417195221-95765f3b9bad/go.mod h1:kiv3jEnBbeueMNNJclaMMJULL/tjqJ6wc136d+uxqSs=
-github.com/decred/dcrd/dcrec/secp256k1/v4 v4.2.0 h1:8UrgZ3GkP4i/CLijOJx79Yu+etlyjdBU4sfcs2WYQMs=
+github.com/decred/dcrd/dcrec/secp256k1/v4 v4.3.0 h1:rpfIENRNNilwHwZeG5+P150SMrnNEcHYvcCuK6dPZSg=
-github.com/decred/dcrd/dcrec/secp256k1/v4 v4.2.0/go.mod h1:v57UDF4pDQJcEfFUCRop3lJL149eHGSe9Jvczhzjo/0=
+github.com/decred/dcrd/dcrec/secp256k1/v4 v4.3.0/go.mod h1:v57UDF4pDQJcEfFUCRop3lJL149eHGSe9Jvczhzjo/0=
 github.com/dustin/go-humanize v1.0.1 h1:GzkhY7T5VNhEkwH0PVJgjz+fX1rhBrR7pRT3mDkpeCY=
 github.com/dustin/go-humanize v1.0.1/go.mod h1:Mu1zIs6XwVuF/gI1OepvI0qD18qycQx+mFykh5fBlto=
 github.com/go-chi/chi/v5 v5.0.12 h1:9euLV5sTrTNTRUU9POmDUvfxyj6LAABLUcEWO+JJb4s=
@@ -96,20 +96,20 @@ github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/
 github.com/stretchr/testify v1.7.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
 github.com/stretchr/testify v1.9.0 h1:HtqpIVDClZ4nwg75+f6Lvsy/wHu+3BoSGCbBAcpTsTg=
 github.com/stretchr/testify v1.9.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
-golang.org/x/crypto v0.21.0 h1:X31++rzVUdKhX5sWmSOFZxx8UW/ldWx55cbf08iNAMA=
+golang.org/x/crypto v0.22.0 h1:g1v0xeRhjcugydODzvb3mEM9SQ0HGp9s/nh3COQ/C30=
-golang.org/x/crypto v0.21.0/go.mod h1:0BP7YvVV9gBbVKyeTG0Gyn+gZm94bibOW5BjDEYAOMs=
+golang.org/x/crypto v0.22.0/go.mod h1:vr6Su+7cTlO45qkww3VDJlzDn0ctJvRgYbC2NvXHt+M=
-golang.org/x/exp v0.0.0-20240222234643-814bf88cf225 h1:LfspQV/FYTatPTr/3HzIcmiUFH7PGP+OQ6mgDYo3yuQ=
+golang.org/x/exp v0.0.0-20240416160154-fe59bbe5cc7f h1:99ci1mjWVBWwJiEKYY6jWa4d2nTQVIEhZIptnrVb1XY=
-golang.org/x/exp v0.0.0-20240222234643-814bf88cf225/go.mod h1:CxmFvTBINI24O/j8iY7H1xHzx2i4OsyguNBmN/uPtqc=
+golang.org/x/exp v0.0.0-20240416160154-fe59bbe5cc7f/go.mod h1:/lliqkxwWAhPjf5oSOIJup2XcqJaw8RGS6k3TGEc7GI=
-golang.org/x/net v0.22.0 h1:9sGLhx7iRIHEiX0oAJ3MRZMUCElJgy7Br1nO+AMN3Tc=
+golang.org/x/net v0.24.0 h1:1PcaxkF854Fu3+lvBIx5SYn9wRlBzzcnHZSiaFFAb0w=
-golang.org/x/net v0.22.0/go.mod h1:JKghWKKOSdJwpW2GEx0Ja7fmaKnMsbu+MWVZTokSYmg=
+golang.org/x/net v0.24.0/go.mod h1:2Q7sJY5mzlzWjKtYUEXSlBWCdyaioyXzRB2RtU8KVE8=
 golang.org/x/sys v0.0.0-20191204072324-ce4227a45e2e/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20220715151400-c0bba94af5f8/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.18.0 h1:DBdB3niSjOA/O0blCZBqDefyWNYveAYMNF1Wum0DYQ4=
+golang.org/x/sys v0.19.0 h1:q5f1RH2jigJ1MoAWp2KTp3gm5zAGFUTarQZ5U386+4o=
-golang.org/x/sys v0.18.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+golang.org/x/sys v0.19.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
 golang.org/x/text v0.14.0 h1:ScX5w1eTa3QqT8oi6+ziP7dTV1S2+ALU0bI+0zXKWiQ=
 golang.org/x/text v0.14.0/go.mod h1:18ZOQIKpY8NJVqYksKHtTdi31H5itFRjB5/qKTNYzSU=
-golang.org/x/tools v0.18.0 h1:k8NLag8AGHnn+PHbl7g43CtqZAwG60vZkLqgyZgIHgQ=
+golang.org/x/tools v0.20.0 h1:hz/CVckiOxybQvFw6h7b/q80NTr9IUQb4s1IIzW7KNY=
-golang.org/x/tools v0.18.0/go.mod h1:GL7B4CwcLLeo59yx/9UWWuNOW1n3VZ4f5axWfML7Lcg=
+golang.org/x/tools v0.20.0/go.mod h1:WvitBU7JJf6A4jOdg4S1tviW9bhUxkgeCui/0JHctQg=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15 h1:YR8cESwS4TdDjEe65xsg0ogRM/Nc3DYOhEAlW+xobZo=
 gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=

internal/config.go

@@ -2,6 +2,7 @@ package opaal
 
 import (
 	"davidallendj/opaal/internal/oauth"
+	"davidallendj/opaal/internal/oidc"
 	"log"
 	"os"
 	"path/filepath"
@@ -45,6 +46,7 @@ type TokenOptions struct {
 	Forwarding bool          `yaml:"forwarding"`
 	Refresh    bool          `yaml:"refresh"`
 	Scope      []string      `yaml:"scope"`
+	//TODO: allow specifying audience in returned token
 }
 
 type Authentication struct {
@@ -55,9 +57,10 @@ type Authentication struct {
 }
 
 type Authorization struct {
+	Token     TokenOptions `yaml:"token"`
 	Endpoints Endpoints    `yaml:"endpoints"`
 	KeyPath   string       `yaml:"key-path"`
-	Token     TokenOptions `yaml:"token"`
+	Audience  []string     `yaml:"audience"` // NOTE: overrides the "aud" claim in token sent to authorization server
 }
 
 type Config struct {
@@ -70,11 +73,18 @@ type Config struct {
 }
 
 func NewConfig() Config {
-	return Config{
+	config := Config{
 		Version: goutil.GetCommit(),
 		Server: server.Server{
 			Host: "127.0.0.1",
 			Port: 3333,
+			Issuer: server.IdentityProviderServer{
+				Endpoints: oidc.Endpoints{
+					Authorization: "",
+					Token:         "",
+					JwksUri:       "",
+				},
+			},
 		},
 		Options: Options{
 			RunOnce:     true,
@@ -97,6 +107,7 @@ func NewConfig() Config {
 			},
 		},
 	}
+	return config
 }
 
 func LoadConfig(path string) Config {

internal/flows/jwt_bearer.go

@@ -4,7 +4,6 @@ import (
 	"crypto/rand"
 	"crypto/rsa"
 	"davidallendj/opaal/internal/oauth"
-	"davidallendj/opaal/internal/oidc"
 	"encoding/json"
 	"fmt"
 	"os"
@@ -19,14 +18,15 @@ import (
 )
 
 type JwtBearerFlowParams struct {
-	AccessToken      string
+	AccessToken string
-	IdToken          string
+	IdToken     string
-	IdentityProvider *oidc.IdentityProvider
+	// IdentityProvider *oidc.IdentityProvider
-	TrustedIssuer    *oauth.TrustedIssuer
+	TrustedIssuer *oauth.TrustedIssuer
-	Client           *oauth.Client
+	Client        *oauth.Client
-	Refresh          bool
+	Audience      []string
-	Verbose          bool
+	Refresh       bool
-	KeyPath          string
+	Verbose       bool
+	KeyPath       string
 }
 
 type JwtBearerFlowEndpoints struct {
@@ -39,28 +39,36 @@ type JwtBearerFlowEndpoints struct {
 func NewJwtBearerFlow(eps JwtBearerFlowEndpoints, params JwtBearerFlowParams) (string, error) {
 	// 1. verify that the JWT from the issuer is valid using all keys
 	var (
-		idp           = params.IdentityProvider
+		// idp           = params.IdentityProvider
 		accessToken   = params.AccessToken
 		idToken       = params.IdToken
 		client        = params.Client
 		trustedIssuer = params.TrustedIssuer
 		verbose       = params.Verbose
 	)
+
+	// pre-condition checks to make sure certain variables are set
+	if client == nil {
+		return "", fmt.Errorf("invalid client (client is nil)")
+	}
+	if verbose {
+		fmt.Printf("ID token (IDP): %s\n access token (IDP): %s", accessToken, idToken)
+	}
 	if accessToken != "" {
-		_, err := jws.Verify([]byte(accessToken), jws.WithKeySet(idp.KeySet), jws.WithValidateKey(true))
+		_, err := jws.Verify([]byte(accessToken), jws.WithKeySet(client.Provider.KeySet), jws.WithValidateKey(true))
 		if err != nil {
 			return "", fmt.Errorf("failed to verify access token: %v", err)
 		}
 	}
 
 	if idToken != "" {
-		_, err := jws.Verify([]byte(idToken), jws.WithKeySet(idp.KeySet), jws.WithValidateKey(true))
+		_, err := jws.Verify([]byte(idToken), jws.WithKeySet(client.Provider.KeySet), jws.WithValidateKey(true))
 		if err != nil {
 			return "", fmt.Errorf("failed to verify ID token: %v", err)
 		}
 	}
 
-	// 2. Check if we are already registered as a trusted issuer with authorization server...
+	// TODO: 2. Check if we are already registered as a trusted issuer with authorization server...
 
 	// 3.a if not, create a new JWKS (or just JWK) to be verified
 	var (
@@ -77,7 +85,7 @@ func NewJwtBearerFlow(eps JwtBearerFlowEndpoints, params JwtBearerFlowParams) (s
 		if err != nil {
 			return "", fmt.Errorf("failed to generate new RSA key: %v", err)
 		}
-		privateJwk, publicJwk, err = cryptox.GenerateJwkKeyPairFromPrivateKey(privateKey)
+		privateJwk, publicJwk, err = GenerateJwkKeyPairFromPrivateKey(privateKey) // FIXME: needs to pull correct version from cryptox
 		if err != nil {
 			return "", fmt.Errorf("failed to generate JWK pair from private key: %v", err)
 		}
@@ -126,18 +134,24 @@ func NewJwtBearerFlow(eps JwtBearerFlowEndpoints, params JwtBearerFlowParams) (s
 	// TODO: add trusted issuer to cache if successful
 
 	// 4. create a new JWT based on the claims from the identity provider and sign
-	parsedIdToken, err := jwt.ParseString(idToken, jwt.WithKeySet(idp.KeySet))
+	parsedIdToken, err := jwt.ParseString(idToken, jwt.WithKeySet(client.Provider.KeySet))
 	if err != nil {
 		return "", fmt.Errorf("failed to parse ID token: %v", err)
 	}
+
 	payload := parsedIdToken.PrivateClaims()
 	payload["iss"] = trustedIssuer.Issuer
 	payload["aud"] = []string{eps.Token}
 	payload["iat"] = time.Now().Unix()
 	payload["nbf"] = time.Now().Unix()
-	payload["exp"] = time.Now().Add(time.Second * 3600).Unix()
+	payload["exp"] = time.Now().Add(time.Second * 3600 * 16).Unix()
 	payload["sub"] = "opaal"
 
+	// if an "audience" value is set, then override the token endpoint value
+	if len(params.Audience) > 0 {
+		payload["aud"] = params.Audience
+	}
+
 	// include the offline_access scope if refresh tokens are enabled
 	if params.Refresh {
 		v, ok := payload["scope"]
@@ -241,7 +255,7 @@ func ForwardToken(eps JwtBearerFlowEndpoints, params JwtBearerFlowParams) error
 	var (
 		client  = params.Client
 		idToken = params.IdToken
-		idp     = params.IdentityProvider
+		// idp     = params.IdentityProvider
 		verbose = params.Verbose
 	)
 
@@ -249,7 +263,7 @@ func ForwardToken(eps JwtBearerFlowEndpoints, params JwtBearerFlowParams) error
 	if verbose {
 		fmt.Printf("Fetching JWKS from authentication server for verification...\n")
 	}
-	err := idp.FetchJwks()
+	err := client.Provider.FetchJwks()
 	if err != nil {
 		return fmt.Errorf("failed to fetch JWK: %v", err)
 	} else {
@@ -259,7 +273,7 @@ func ForwardToken(eps JwtBearerFlowEndpoints, params JwtBearerFlowParams) error
 		}
 
 		ti := &oauth.TrustedIssuer{
-			Issuer:    idp.Issuer,
+			Issuer:    client.Provider.Issuer,
 			Subject:   "1",
 			ExpiresAt: time.Now().Add(time.Second * 3600),
 		}
@@ -339,3 +353,15 @@ func ForwardToken(eps JwtBearerFlowEndpoints, params JwtBearerFlowParams) error
 	}
 	return nil
 }
+
+func GenerateJwkKeyPairFromPrivateKey(privateKey *rsa.PrivateKey) (jwk.Key, jwk.Key, error) {
+	privateJwk, err := jwk.FromRaw(privateKey)
+	if err != nil {
+		return nil, nil, fmt.Errorf("failed to create private JWK: %v", err)
+	}
+	publicJwk, err := jwk.PublicKeyOf(privateJwk)
+	if err != nil {
+		return nil, nil, fmt.Errorf("failed to create public JWK: %v", err)
+	}
+	return privateJwk, publicJwk, nil
+}

internal/login.go

@@ -12,19 +12,11 @@ import (
 	"time"
 )
 
-func Login(config *Config, client *oauth.Client, provider *oidc.IdentityProvider) error {
+func Login(config *Config) error {
 	if config == nil {
 		return fmt.Errorf("invalid config")
 	}
 
-	if client == nil {
-		return fmt.Errorf("invalid client")
-	}
-
-	if provider == nil {
-		return fmt.Errorf("invalid identity provider")
-	}
-
 	// make cache if it's not where expect
 	_, err := cache.CreateIdentityProvidersIfNotExists(config.Options.CachePath)
 	if err != nil {
@@ -39,25 +31,20 @@ func Login(config *Config, client *oauth.Client, provider *oidc.IdentityProvider
 		}
 
 		// print the authorization URL for sharing
-		var authorizationUrl = client.BuildAuthorizationUrl(provider.Endpoints.Authorization, state)
 		s := NewServerWithConfig(config)
-		fmt.Printf("Login with identity provider:\n\n  %s/login\n  %s\n\n",
+		s.State = state
-			s.GetListenAddr(), authorizationUrl,
-		)
 
-		var button = MakeButton(authorizationUrl, "Login with "+client.Name)
 		var authzClient = oauth.NewClient()
 		authzClient.Scope = config.Authorization.Token.Scope
 
-		// authorize oauth client and listen for callback from provider
-		fmt.Printf("Waiting for authorization code redirect @%s/oidc/callback...\n", s.GetListenAddr())
 		params := server.ServerParams{
 			Verbose: config.Options.Verbose,
 			AuthProvider: &oidc.IdentityProvider{
 				Issuer: config.Authorization.Endpoints.Issuer,
 				Endpoints: oidc.Endpoints{
-					Config:  config.Authorization.Endpoints.Config,
+					Config:        config.Authorization.Endpoints.Config,
-					JwksUri: config.Authorization.Endpoints.JwksUri,
+					Authorization: config.Authorization.Endpoints.Authorize,
+					JwksUri:       config.Authorization.Endpoints.JwksUri,
 				},
 			},
 			JwtBearerEndpoints: flows.JwtBearerFlowEndpoints{
@@ -66,8 +53,7 @@ func Login(config *Config, client *oauth.Client, provider *oidc.IdentityProvider
 				Register:       config.Authorization.Endpoints.Register,
 			},
 			JwtBearerParams: flows.JwtBearerFlowParams{
-				Client:           authzClient,
+				Client: authzClient,
-				IdentityProvider: provider,
 				TrustedIssuer: &oauth.TrustedIssuer{
 					AllowAnySubject: false,
 					Issuer:          s.Addr,
@@ -75,8 +61,9 @@ func Login(config *Config, client *oauth.Client, provider *oidc.IdentityProvider
 					ExpiresAt:       time.Now().Add(config.Authorization.Token.Duration),
 					Scope:           []string{},
 				},
-				Verbose: config.Options.Verbose,
+				Verbose:  config.Options.Verbose,
-				Refresh: config.Authorization.Token.Refresh,
+				Refresh:  config.Authorization.Token.Refresh,
+				Audience: config.Authorization.Audience,
 			},
 			ClientCredentialsEndpoints: flows.ClientCredentialsFlowEndpoints{
 				Clients:   config.Authorization.Endpoints.Clients,
@@ -87,7 +74,7 @@ func Login(config *Config, client *oauth.Client, provider *oidc.IdentityProvider
 				Client: authzClient,
 			},
 		}
-		err = s.Start(button, provider, client, params)
+		err = s.StartLogin(config.Authentication.Clients, params)
 		if errors.Is(err, http.ErrServerClosed) {
 			fmt.Printf("\n=========================================\nServer closed.\n=========================================\n\n")
 		} else if err != nil {
@@ -96,7 +83,7 @@ func Login(config *Config, client *oauth.Client, provider *oidc.IdentityProvider
 
 	} else if config.Options.FlowType == "client_credentials" {
 		params := flows.ClientCredentialsFlowParams{
-			Client: client,
+			Client: nil, // # FIXME: need to do something about this being nil I think
 		}
 		_, err := NewClientCredentialsFlowWithConfig(config, params)
 		if err != nil {
@@ -108,12 +95,3 @@ func Login(config *Config, client *oauth.Client, provider *oidc.IdentityProvider
 
 	return nil
 }
-
-func MakeButton(url string, text string) string {
-	html := "<input type=\"button\" "
-	html += "class=\"button\" "
-	html += fmt.Sprintf("onclick=\"window.location.href='%s';\" ", url)
-	html += fmt.Sprintf("value=\"%s\"", text)
-	return html
-	// return "<a href=\"" + url + "\"> " + text + "</a>"
-}

internal/new.go

@@ -29,7 +29,7 @@ func NewClientWithConfig(config *Config) *oauth.Client {
 		Id:           clients[0].Id,
 		Secret:       clients[0].Secret,
 		Name:         clients[0].Name,
-		Issuer:       clients[0].Issuer,
+		Provider:     clients[0].Provider,
 		Scope:        clients[0].Scope,
 		RedirectUris: clients[0].RedirectUris,
 	}
@@ -53,7 +53,7 @@ func NewClientWithConfigByName(config *Config, name string) *oauth.Client {
 
 func NewClientWithConfigByProvider(config *Config, issuer string) *oauth.Client {
 	index := slices.IndexFunc(config.Authentication.Clients, func(c oauth.Client) bool {
-		return c.Issuer == issuer
+		return c.Provider.Issuer == issuer
 	})
 
 	if index >= 0 {
@@ -90,6 +90,12 @@ func NewServerWithConfig(conf *Config) *server.Server {
 		},
 		Host: host,
 		Port: port,
+		Issuer: server.IdentityProviderServer{
+			Host:      conf.Server.Issuer.Host,
+			Port:      conf.Server.Issuer.Port,
+			Endpoints: conf.Server.Issuer.Endpoints,
+			Clients:   conf.Server.Issuer.Clients,
+		},
 	}
 	return server
 }

internal/oauth/authenticate.go

@@ -16,13 +16,15 @@ func (client *Client) IsFlowInitiated() bool {
 	return client.FlowId != ""
 }
 
-func (client *Client) BuildAuthorizationUrl(issuer string, state string) string {
+func (client *Client) BuildAuthorizationUrl(state string) string {
-	return issuer + "?" + "client_id=" + client.Id +
+	url := client.Provider.Endpoints.Authorization + "?client_id=" + client.Id +
 		"&redirect_uri=" + url.QueryEscape(strings.Join(client.RedirectUris, ",")) +
 		"&response_type=code" + // this has to be set to "code"
-		"&state=" + state +
+		"&scope=" + strings.Join(client.Scope, "+")
-		"&scope=" + strings.Join(client.Scope, "+") +
+	if state != "" {
-		"&resource=" + url.QueryEscape("http://127.0.0.1:4444/oauth2/token")
+		url += "&state=" + state
+	}
+	return url
 }
 
 func (client *Client) InitiateLoginFlow(loginUrl string) error {
@@ -91,7 +93,7 @@ func (client *Client) FetchCSRFToken(flowUrl string) error {
 	return fmt.Errorf("failed to extract CSRF token: not found")
 }
 
-func (client *Client) FetchTokenFromAuthenticationServer(code string, remoteUrl string, state string) ([]byte, error) {
+func (client *Client) FetchTokenFromAuthenticationServer(code string, state string) ([]byte, error) {
 	body := url.Values{
 		"grant_type":    {"authorization_code"},
 		"client_id":     {client.Id},
@@ -105,14 +107,16 @@ func (client *Client) FetchTokenFromAuthenticationServer(code string, remoteUrl
 	if state != "" {
 		body["state"] = []string{state}
 	}
-	res, err := http.PostForm(remoteUrl, body)
+	res, err := http.PostForm(client.Provider.Endpoints.Token, body)
 	if err != nil {
-		return nil, fmt.Errorf("failed to get ID token: %s", err)
+		return nil, fmt.Errorf("failed to get ID token: %v", err)
 	}
+	b, err := io.ReadAll(res.Body)
+	if err != nil {
+		return nil, fmt.Errorf("failed to read response body: %v", err)
+	}
+	fmt.Printf("%s\n", string(b))
 	defer res.Body.Close()
 
-	// domain, _ := url.Parse("http://127.0.0.1")
+	return b, nil
-	// client.Jar.SetCookies(domain, res.Cookies())
-
-	return io.ReadAll(res.Body)
 }

internal/oauth/client.go

@@ -1,6 +1,7 @@
 package oauth
 
 import (
+	"davidallendj/opaal/internal/oidc"
 	"encoding/json"
 	"fmt"
 	"net/http"
@@ -24,15 +25,15 @@ const (
 
 type Client struct {
 	http.Client
-	Id                      string   `db:"id" yaml:"id"`
+	Id                      string                `db:"id" yaml:"id"`
-	Secret                  string   `db:"secret" yaml:"secret"`
+	Secret                  string                `db:"secret" yaml:"secret"`
-	Name                    string   `db:"name" yaml:"name"`
+	Name                    string                `db:"name" yaml:"name"`
-	Description             string   `db:"description" yaml:"description"`
+	Description             string                `db:"description" yaml:"description"`
-	Issuer                  string   `db:"issuer" yaml:"issuer"`
+	Provider                oidc.IdentityProvider `db:"issuer" yaml:"provider"`
-	RegistrationAccessToken string   `db:"registration_access_token" yaml:"registration-access-token"`
+	RegistrationAccessToken string                `db:"registration_access_token" yaml:"registration-access-token"`
-	RedirectUris            []string `db:"redirect_uris" yaml:"redirect-uris"`
+	RedirectUris            []string              `db:"redirect_uris" yaml:"redirect-uris"`
-	Scope                   []string `db:"scope" yaml:"scope"`
+	Scope                   []string              `db:"scope" yaml:"scope"`
-	Audience                []string `db:"audience" yaml:"audience"`
+	Audience                []string              `db:"audience" yaml:"audience"`
 	FlowId                  string
 	CsrfToken               string
 }

internal/oidc/oidc.go

@@ -111,26 +111,11 @@ func (p *IdentityProvider) LoadServerConfig(path string) error {
 }
 
 func (p *IdentityProvider) FetchServerConfig() error {
-	// make a request to a server's openid-configuration
+	tmp, err := FetchServerConfig(p.Issuer)
-	req, err := http.NewRequest(http.MethodGet, p.Issuer+"/.well-known/openid-configuration", bytes.NewBuffer([]byte{}))
 	if err != nil {
-		return fmt.Errorf("failed to create a new request: %v", err)
+		return err
-	}
-
-	client := &http.Client{} // temp client to get info and not used in flow
-	res, err := client.Do(req)
-	if err != nil {
-		return fmt.Errorf("failed to do request: %v", err)
-	}
-
-	body, err := io.ReadAll(res.Body)
-	if err != nil {
-		return fmt.Errorf("failed to read response body: %v", err)
-	}
-	err = p.ParseServerConfig(body)
-	if err != nil {
-		return fmt.Errorf("failed to parse server config: %v", err)
 	}
+	p = tmp
 	return nil
 }
 
@@ -147,10 +132,15 @@ func FetchServerConfig(issuer string) (*IdentityProvider, error) {
 		return nil, fmt.Errorf("failed to do request: %v", err)
 	}
 
+	if res.StatusCode != http.StatusOK {
+		return nil, fmt.Errorf("HTTP status code: %d", res.StatusCode)
+	}
+
 	body, err := io.ReadAll(res.Body)
 	if err != nil {
 		return nil, fmt.Errorf("failed to read response body: %v", err)
 	}
+
 	var p IdentityProvider
 	err = p.ParseServerConfig(body)
 	if err != nil {
@@ -174,3 +164,25 @@ func (p *IdentityProvider) FetchJwks() error {
 
 	return nil
 }
+
+func (p *IdentityProvider) UpdateEndpoints(other *IdentityProvider) {
+	UpdateEndpoints(&p.Endpoints, &other.Endpoints)
+}
+
+func UpdateEndpoints(eps *Endpoints, other *Endpoints) {
+	// only update endpoints that are not empty
+	var UpdateIfEmpty = func(ep *string, s string) {
+		if ep != nil {
+			if *ep == "" {
+				*ep = s
+			}
+		}
+	}
+	UpdateIfEmpty(&eps.Config, other.Config)
+	UpdateIfEmpty(&eps.Authorization, other.Authorization)
+	UpdateIfEmpty(&eps.Token, other.Token)
+	UpdateIfEmpty(&eps.Revocation, other.Revocation)
+	UpdateIfEmpty(&eps.Introspection, other.Introspection)
+	UpdateIfEmpty(&eps.UserInfo, other.UserInfo)
+	UpdateIfEmpty(&eps.JwksUri, other.JwksUri)
+}

internal/server/idp.go

@@ -0,0 +1,290 @@
+package server
+
+import (
+	"crypto/rand"
+	"crypto/rsa"
+	"davidallendj/opaal/internal/oidc"
+	"encoding/json"
+	"fmt"
+	"net/http"
+	"os"
+	"slices"
+	"strings"
+	"time"
+
+	"github.com/davidallendj/go-utils/cryptox"
+	"github.com/davidallendj/go-utils/util"
+	"github.com/go-chi/chi/v5"
+	"github.com/lestrrat-go/jwx/v2/jwa"
+	"github.com/lestrrat-go/jwx/v2/jwk"
+	"github.com/lestrrat-go/jwx/v2/jws"
+	"github.com/lestrrat-go/jwx/v2/jwt"
+)
+
+// TODO: make this a completely separate server
+type IdentityProviderServer struct {
+	Host      string             `yaml:"host"`
+	Port      int                `yaml:"port"`
+	Endpoints oidc.Endpoints     `yaml:"endpoints"`
+	Clients   []RegisteredClient `yaml:"clients"`
+}
+
+// NOTE: could we use a oauth.Client here instead??
+type RegisteredClient struct {
+	Id           string   `yaml:"id"`
+	Secret       string   `yaml:"secret"`
+	Name         string   `yaml:"name"`
+	RedirectUris []string `yaml:"redirect-uris"`
+}
+
+func (s *Server) StartIdentityProvider() error {
+	// NOTE: this example does NOT implement CSRF tokens nor use them
+
+	// create an example identity provider
+	var (
+		r = chi.NewRouter()
+		// clients  = []oauth.Client{}
+		activeCodes = []string{}
+	)
+
+	// update endpoints that have values set
+	defaultEps := oidc.Endpoints{
+		Authorization: "http://" + s.Addr + "/oauth2/authorize",
+		Token:         "http://" + s.Addr + "/oauth2/token",
+		JwksUri:       "http://" + s.Addr + "/.well-known/jwks.json",
+	}
+	oidc.UpdateEndpoints(&s.Issuer.Endpoints, &defaultEps)
+
+	// generate key pair used to sign JWKS and create JWTs
+	privateKey, err := rsa.GenerateKey(rand.Reader, 2048)
+	if err != nil {
+		return fmt.Errorf("failed to generate new RSA key: %v", err)
+	}
+	privateJwk, publicJwk, err := cryptox.GenerateJwkKeyPairFromPrivateKey(privateKey)
+	if err != nil {
+		return fmt.Errorf("failed to generate JWK pair from private key: %v", err)
+	}
+	kid, _ := privateJwk.Get("kid")
+	publicJwk.Set("kid", kid)
+	publicJwk.Set("use", "sig")
+	publicJwk.Set("kty", "RSA")
+	publicJwk.Set("alg", "RS256")
+	if err := publicJwk.Validate(); err != nil {
+		return fmt.Errorf("failed to validate public JWK: %v", err)
+	}
+
+	// TODO: create .well-known JWKS endpoint with json
+	r.HandleFunc("/.well-known/jwks.json", func(w http.ResponseWriter, r *http.Request) {
+		// TODO: generate new JWKs from a private key
+
+		jwks := map[string]any{
+			"keys": []jwk.Key{
+				publicJwk,
+			},
+		}
+		b, err := json.Marshal(jwks)
+		if err != nil {
+			return
+		}
+		w.Write(b)
+	})
+
+	r.HandleFunc("/.well-known/openid-configuration", func(w http.ResponseWriter, r *http.Request) {
+		// create config JSON to serve with GET request
+		config := map[string]any{
+			"issuer":                 "http://" + s.Addr,
+			"authorization_endpoint": s.Issuer.Endpoints.Authorization,
+			"token_endpoint":         s.Issuer.Endpoints.Token,
+			"jwks_uri":               s.Issuer.Endpoints.JwksUri,
+			"scopes_supported": []string{
+				"openid",
+				"profile",
+				"email",
+			},
+			"response_types_supported": []string{
+				"code",
+			},
+			"grant_types_supported": []string{
+				"authorization_code",
+			},
+			"id_token_signing_alg_values_supported": []string{
+				"RS256",
+			},
+			"claims_supported": []string{
+				"iss",
+				"sub",
+				"aud",
+				"exp",
+				"iat",
+				"name",
+				"email",
+			},
+		}
+
+		b, err := json.Marshal(config)
+		if err != nil {
+			return
+		}
+		w.Write(b)
+	})
+	r.HandleFunc("/register", func(w http.ResponseWriter, r *http.Request) {
+		// serve up a simple login page
+	})
+	r.HandleFunc("/consent", func(w http.ResponseWriter, r *http.Request) {
+		// give consent for app to use
+	})
+	r.HandleFunc("/browser/login", func(w http.ResponseWriter, r *http.Request) {
+		// serve up a login page for user creds
+		form, err := os.ReadFile("pages/login.html")
+		if err != nil {
+			fmt.Printf("failed to load login form: %v", err)
+		}
+		w.Write(form)
+	})
+	r.HandleFunc("/api/login", func(w http.ResponseWriter, r *http.Request) {
+		// check for example identity with POST request
+		r.ParseForm()
+		username := r.Form.Get("username")
+		password := r.Form.Get("password")
+
+		if len(s.Issuer.Clients) <= 0 {
+			fmt.Printf("no registered clients found with identity provider (add them in config)\n")
+			return
+		}
+
+		// example username and password so do simplified authorization code flow
+		if username == "openchami" && password == "openchami" {
+			client := s.Issuer.Clients[0]
+
+			// check if there are any redirect URIs supplied
+			if len(client.RedirectUris) <= 0 {
+				fmt.Printf("no redirect URIs found for client %s (ID: %s)\n", client.Name, client.Id)
+				return
+			}
+			for _, url := range client.RedirectUris {
+				// send an authorization code to each URI
+				code := util.RandomString(64)
+				activeCodes = append(activeCodes, code)
+				redirectUrl := fmt.Sprintf("%s?code=%s", url, code)
+				fmt.Printf("redirect URL: %s\n", redirectUrl)
+				http.Redirect(w, r, redirectUrl, http.StatusFound)
+				// _, _, err := httpx.MakeHttpRequest(fmt.Sprintf("%s?code=%s", url, code), http.MethodGet, nil, nil)
+				// if err != nil {
+				// 	fmt.Printf("failed to make request: %v\n", err)
+				// 	continue
+				// }
+			}
+		} else {
+			w.Write([]byte("error logging in"))
+			http.Redirect(w, r, "/browser/login", http.StatusUnauthorized)
+		}
+	})
+	r.HandleFunc("/oauth2/token", func(w http.ResponseWriter, r *http.Request) {
+		r.ParseForm()
+
+		// check for authorization code and make sure it's valid
+		var code = r.Form.Get("code")
+		index := slices.IndexFunc(activeCodes, func(s string) bool { return s == code })
+		if index < 0 {
+			fmt.Printf("invalid authorization code: %s\n", code)
+			return
+		}
+
+		// now create and return a JWT that can be verified with by authorization server
+		iat := time.Now().Unix()
+		exp := time.Now().Add(time.Second * 3600 * 16).Unix()
+		t := jwt.New()
+		t.Set(jwt.IssuerKey, s.Addr)
+		t.Set(jwt.SubjectKey, "ochami")
+		t.Set(jwt.AudienceKey, "ochami")
+		t.Set(jwt.IssuedAtKey, iat)
+		t.Set(jwt.ExpirationKey, exp)
+		t.Set("name", "ochami")
+		t.Set("email", "example@ochami.org")
+		t.Set("email_verified", true)
+		t.Set("scope", []string{
+			"openid",
+			"profile",
+			"email",
+			"example",
+		})
+		// payload := map[string]any{}
+		// payload["iss"] = s.Addr
+		// payload["aud"] = "ochami"
+		// payload["iat"] = iat
+		// payload["nbf"] = iat
+		// payload["exp"] = exp
+		// payload["sub"] = "ochami"
+		// payload["name"] = "ochami"
+		// payload["email"] = "example@ochami.org"
+		// payload["email_verified"] = true
+		// payload["scope"] = []string{
+		// 	"openid",
+		// 	"profile",
+		// 	"email",
+		// 	"example",
+		// }
+		payloadJson, err := json.MarshalIndent(t, "", "\t")
+		if err != nil {
+			fmt.Printf("failed to marshal payload: %v", err)
+			return
+		}
+		signed, err := jws.Sign(payloadJson, jws.WithKey(jwa.RS256, privateJwk))
+		if err != nil {
+			fmt.Printf("failed to sign token: %v\n", err)
+			return
+		}
+
+		// construct the bearer token with required fields
+		scope, _ := t.Get("scope")
+		bearer := map[string]any{
+			"token_type": "Bearer",
+			"id_token":   string(signed),
+			"expires_in": exp,
+			"created_at": iat,
+			"scope":      strings.Join(scope.([]string), " "),
+		}
+
+		b, err := json.MarshalIndent(bearer, "", "\t")
+		if err != nil {
+			fmt.Printf("failed to marshal bearer token: %v\n", err)
+			return
+		}
+		fmt.Printf("bearer: %s\n", string(b))
+		w.Write(b)
+	})
+	r.HandleFunc("/oauth2/authorize", func(w http.ResponseWriter, r *http.Request) {
+		var (
+			responseType = r.URL.Query().Get("response_type")
+			clientId     = r.URL.Query().Get("client_id")
+			redirectUris = r.URL.Query().Get("redirect_uri")
+		)
+
+		// check for required authorization code params
+		if responseType != "code" {
+			fmt.Printf("invalid response type\n")
+			return
+		}
+
+		// find a valid client
+		index := slices.IndexFunc(s.Issuer.Clients, func(c RegisteredClient) bool {
+			fmt.Printf("%s ? %s\n", c.Id, clientId)
+			return c.Id == clientId
+		})
+		if index < 0 {
+			fmt.Printf("no valid client found")
+			return
+		}
+
+		// TODO: check that our redirect URIs all match
+		for _, uri := range redirectUris {
+			_ = uri
+		}
+
+		// redirect to browser login since we don't do session management here
+		http.Redirect(w, r, "/browser/login", http.StatusFound)
+	})
+
+	s.Handler = r
+	return s.ListenAndServe()
+}

internal/server/server.go

@@ -7,6 +7,7 @@ import (
 	"encoding/json"
 	"fmt"
 	"net/http"
+	"slices"
 
 	"github.com/davidallendj/go-utils/httpx"
 	"github.com/go-chi/chi/v5"
@@ -17,10 +18,11 @@ import (
 
 type Server struct {
 	*http.Server
-	Host     string `yaml:"host"`
+	Host     string                 `yaml:"host"`
-	Port     int    `yaml:"port"`
+	Port     int                    `yaml:"port"`
-	Callback string `yaml:"callback"`
+	Callback string                 `yaml:"callback"`
-	State    string `yaml:"state"`
+	State    string                 `yaml:"state"`
+	Issuer   IdentityProviderServer `yaml:"issuer"`
 }
 
 type ServerParams struct {
@@ -40,12 +42,39 @@ func (s *Server) GetListenAddr() string {
 	return fmt.Sprintf("%s:%d", s.Host, s.Port)
 }
 
-func (s *Server) Start(buttons string, provider *oidc.IdentityProvider, client *oauth.Client, params ServerParams) error {
+func (s *Server) StartLogin(clients []oauth.Client, params ServerParams) error {
-	var target = ""
+	var (
+		target   string
+		callback string
+		client   *oauth.Client
+		sso      string
+	)
 
 	// check if callback is set
 	if s.Callback == "" {
-		s.Callback = "/oidc/callback"
+		callback = "/oidc/callback"
+	}
+
+	// make the login page SSO buttons and authorization URLs to write to stdout
+	buttons := ""
+	fmt.Printf("Login with an identity provider: \n")
+	for i, client := range clients {
+		// fetch provider configuration before adding button
+		p, err := oidc.FetchServerConfig(client.Provider.Issuer)
+		if err != nil {
+			fmt.Printf("failed to fetch server config: %v\n", err)
+			continue
+		}
+
+		// if we're able to get the config, go ahead and try to fetch jwks too
+		if err = p.FetchJwks(); err != nil {
+			fmt.Printf("failed to fetch JWKS: %v\n", err)
+			continue
+		}
+
+		clients[i].Provider = *p
+		buttons += makeButton(fmt.Sprintf("/login?sso=%s", client.Id), client.Name)
+		fmt.Printf("\t%s: /login?sso=%s\n", client.Name, client.Id)
 	}
 
 	var code string
@@ -72,7 +101,27 @@ func (s *Server) Start(buttons string, provider *oidc.IdentityProvider, client *
 		// add target if query exists
 		if r != nil {
 			target = r.URL.Query().Get("target")
+			sso = r.URL.Query().Get("sso")
+
+			// TODO: get client from list and build the authorization URL string
+			index := slices.IndexFunc(clients, func(c oauth.Client) bool {
+				return c.Id == sso
+			})
+
+			// TODO: redirect the user to authorization URL and return from func
+			foundClient := index >= 0
+			if foundClient {
+				client = &clients[index]
+
+				url := client.BuildAuthorizationUrl(s.State)
+				if params.Verbose {
+					fmt.Printf("Redirect URL: %s\n", url)
+				}
+				http.Redirect(w, r, url, http.StatusFound)
+				return
+			}
 		}
+
 		// show login page with notice to redirect
 		template, err := gonja.FromFile("pages/index.html")
 		if err != nil {
@@ -92,47 +141,54 @@ func (s *Server) Start(buttons string, provider *oidc.IdentityProvider, client *
 			p    = params.AuthProvider
 			jwks []byte
 		)
-		// try and get the JWKS from param first
+
-		if p.Endpoints.JwksUri != "" {
+		fetchAndMarshal := func() (err error) {
-			err := p.FetchJwks()
+			err = p.FetchJwks()
 			if err != nil {
-				fmt.Printf("failed to fetch keys using JWKS url...trying to fetch config and try again...\n")
+				fmt.Printf("failed to fetch keys: %v\n", err)
+				return
 			}
 			jwks, err = json.Marshal(p.KeySet)
 			if err != nil {
 				fmt.Printf("failed to marshal JWKS: %v\n", err)
 			}
-		} else if p.Endpoints.Config != "" && jwks == nil {
-			// otherwise, try and fetch the whole config and try again
-			err := p.FetchServerConfig()
-			if err != nil {
-				fmt.Printf("failed to fetch server config: %v\n", err)
-				http.Redirect(w, r, "/error", http.StatusInternalServerError)
-				return
-			}
-			err = p.FetchJwks()
-			if err != nil {
-				fmt.Printf("failed to fetch JWKS after fetching server config: %v\n", err)
-				http.Redirect(w, r, "/error", http.StatusInternalServerError)
-				return
-			}
-
-		}
-
-		// forward the JWKS from the authorization server
-		if jwks == nil {
-			fmt.Printf("no JWKS was fetched from authorization server\n")
-			http.Redirect(w, r, "/error", http.StatusInternalServerError)
 			return
 		}
-		w.Write(jwks)
 
+		// try and get the JWKS from param first
+		if p.Endpoints.JwksUri != "" {
+			if err := fetchAndMarshal(); err != nil {
+				w.Write(jwks)
+				return
+			}
+		}
+
+		// otherwise or if fetching the JWKS failed, try and fetch the whole config first and try again
+		if p.Endpoints.Config != "" {
+			if err := p.FetchServerConfig(); err != nil {
+				fmt.Printf("failed to fetch server config: %v\n", err)
+				http.Error(w, http.StatusText(http.StatusInternalServerError), http.StatusInternalServerError)
+				return
+			}
+		} else {
+			fmt.Printf("getting JWKS from param failed and endpoints config unavailable\n")
+			http.Error(w, http.StatusText(http.StatusInternalServerError), http.StatusInternalServerError)
+			return
+		}
+
+		if err := fetchAndMarshal(); err != nil {
+			fmt.Printf("failed to fetch and marshal JWKS after config update: %v\n", err)
+			http.Error(w, http.StatusText(http.StatusInternalServerError), http.StatusInternalServerError)
+			return
+		}
+
+		w.Write(jwks)
 	})
 	r.HandleFunc("/token", func(w http.ResponseWriter, r *http.Request) {
 		// use refresh token provided to do a refresh token grant
 		refreshToken := r.URL.Query().Get("refresh-token")
 		if refreshToken != "" {
-			_, err := params.JwtBearerParams.Client.PerformRefreshTokenGrant(provider.Endpoints.Token, refreshToken)
+			_, err := params.JwtBearerParams.Client.PerformRefreshTokenGrant(client.Provider.Endpoints.Token, refreshToken)
 			if err != nil {
 				fmt.Printf("failed to perform refresh token grant: %v\n", err)
 				http.Redirect(w, r, "/error", http.StatusInternalServerError)
@@ -151,6 +207,8 @@ func (s *Server) Start(buttons string, provider *oidc.IdentityProvider, client *
 				return
 			}
 		} else {
+			// FIXME: I think this probably needs to reworked or removed
+			// NOTE: this logic fetches a token for services to retrieve like BSS
 			// perform a client credentials grant and return a token
 			var err error
 			accessToken, err = flows.NewClientCredentialsFlow(params.ClientCredentialsEndpoints, params.ClientCredentialsParams)
@@ -162,7 +220,7 @@ func (s *Server) Start(buttons string, provider *oidc.IdentityProvider, client *
 			w.Write([]byte(accessToken))
 		}
 	})
-	r.HandleFunc(s.Callback, func(w http.ResponseWriter, r *http.Request) {
+	r.HandleFunc(callback, func(w http.ResponseWriter, r *http.Request) {
 		// get the code from the OIDC provider
 		if r != nil {
 			code = r.URL.Query().Get("code")
@@ -170,10 +228,15 @@ func (s *Server) Start(buttons string, provider *oidc.IdentityProvider, client *
 				fmt.Printf("Authorization code: %v\n", code)
 			}
 
+			// make sure we have the correct client to use
+			if client == nil {
+				fmt.Printf("failed to find valid client")
+				return
+			}
+
 			// use code from response and exchange for bearer token (with ID token)
 			bearerToken, err := client.FetchTokenFromAuthenticationServer(
 				code,
-				provider.Endpoints.Token,
 				s.State,
 			)
 			if err != nil {
@@ -203,6 +266,7 @@ func (s *Server) Start(buttons string, provider *oidc.IdentityProvider, client *
 			// complete JWT bearer flow to receive access token from authorization server
 			// fmt.Printf("bearer: %v\n", string(bearerToken))
 			params.JwtBearerParams.IdToken = data["id_token"].(string)
+			params.JwtBearerParams.Client = client
 			accessToken, err = flows.NewJwtBearerFlow(params.JwtBearerEndpoints, params.JwtBearerParams)
 			if err != nil {
 				fmt.Printf("failed to complete JWT bearer flow: %v\n", err)
@@ -268,3 +332,15 @@ func (s *Server) Start(buttons string, provider *oidc.IdentityProvider, client *
 	s.Handler = r
 	return s.ListenAndServe()
 }
+
+func makeButton(url string, text string) string {
+	// check if we have http:// a
+	// html := "<input type=\"button\" "
+	// html += fmt.Sprintf("onclick=\"window.location.href='%s';\" ", url)
+	// html += fmt.Sprintf("value=\"%s\">", text)
+	html := "<a "
+	html += "class=\"button\" "
+	html += fmt.Sprintf("href=\"%s\">%s", url, text)
+	html += "</a>"
+	return html
+}

pages/index.html

@@ -7,6 +7,7 @@
 	<div id="wrapper">
 	Log in using the option(s) below for an access token. </br></br>
 
+	{{loginForm}}
 	{{loginButtons}}
 	</div>
 </html>

pages/login.html

@@ -0,0 +1,13 @@
+<!DOCTYPE html>
+<html>
+	<div class="log-form">
+		<h2>Login to your account</h2>
+		<form action="/api/login" method="post">
+			<input type="text" id="username" name="username" title="username" placeholder="Enter your username or email..." /><br/>
+			<input type="password" id="password" name="password" title="password" placeholder="Enter your password..." /><br/>
+			<button type="submit" class="btn">Login</button><br/>
+			<a class="forgot" href="#">Forgot Username?</a><br/>
+			<label>(hint: try 'openchami' for both username and password)</label>
+		</form>
+	</div><!--end log form -->
+</html>

pages/static/stylesheets/styles.css

@@ -27,4 +27,10 @@ input[type=text] {
 	padding: 12px 20px;
 	margin: 8px 0;
 	box-sizing: border-box;
+}
+input[type=password] {
+	width: 80%;
+	padding: 12px 20px;
+	margin: 8px 0;
+	box-sizing: border-box;
 }