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feat(cmd/example_server_oidc): Create example server with OIDC auth
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,93 @@ | ||
| package example_server_oidc | ||
|
|
||
| import ( | ||
| "context" | ||
| "fmt" | ||
| "log" | ||
| "net/http" | ||
|
|
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| "github.com/coreos/go-oidc" | ||
| "github.com/sikalabs/slu/cmd/root" | ||
| "github.com/spf13/cobra" | ||
| "golang.org/x/oauth2" | ||
| ) | ||
|
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| var FlagPort int | ||
| var FlagIssuer string | ||
| var FlagClientID string | ||
| var FlagClientSecret string | ||
|
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| func init() { | ||
| root.RootCmd.AddCommand(Cmd) | ||
| Cmd.PersistentFlags().IntVarP(&FlagPort, "port", "p", 8000, "Listen on port") | ||
| Cmd.Flags().StringVar(&FlagIssuer, "issuer", "", "Issuer") | ||
| Cmd.MarkFlagRequired("issuer") | ||
| Cmd.Flags().StringVar(&FlagClientID, "client-id", "", "Client ID") | ||
| Cmd.MarkFlagRequired("client-id") | ||
| Cmd.Flags().StringVar(&FlagClientSecret, "client-secret", "", "Client Secret") | ||
| Cmd.MarkFlagRequired("client-secret") | ||
| } | ||
|
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| var Cmd = &cobra.Command{ | ||
| Use: "example-server-oidc", | ||
| Short: "Run example web server with OIDC", | ||
| Args: cobra.NoArgs, | ||
| Run: func(c *cobra.Command, args []string) { | ||
| Server(FlagPort, FlagIssuer, FlagClientID, FlagClientSecret) | ||
| }, | ||
| } | ||
|
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| func Server(port int, issuer, clientID, clientSecret string) { | ||
| ctx := context.Background() | ||
|
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| provider, err := oidc.NewProvider(ctx, issuer) | ||
| if err != nil { | ||
| log.Fatal(err) | ||
| } | ||
|
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| config := oauth2.Config{ | ||
| ClientID: clientID, | ||
| ClientSecret: clientSecret, | ||
| Endpoint: provider.Endpoint(), | ||
| RedirectURL: fmt.Sprintf("http://127.0.0.1:%d/callback", port), | ||
| Scopes: []string{oidc.ScopeOpenID, "profile", "email"}, | ||
| } | ||
|
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| http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) { | ||
| http.Redirect(w, r, config.AuthCodeURL("state"), http.StatusFound) | ||
| }) | ||
|
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| http.HandleFunc("/callback", func(w http.ResponseWriter, r *http.Request) { | ||
| if r.URL.Query().Get("state") != "state" { | ||
| http.Error(w, "state did not match", http.StatusBadRequest) | ||
| return | ||
| } | ||
|
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| oauth2Token, err := config.Exchange(ctx, r.URL.Query().Get("code")) | ||
| if err != nil { | ||
| http.Error(w, "Failed to exchange token: "+err.Error(), http.StatusInternalServerError) | ||
| return | ||
| } | ||
|
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| rawIDToken, ok := oauth2Token.Extra("id_token").(string) | ||
| if !ok { | ||
| http.Error(w, "No id_token field in oauth2 token.", http.StatusInternalServerError) | ||
| return | ||
| } | ||
|
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| idToken, err := provider.Verifier(&oidc.Config{ClientID: clientID}).Verify(ctx, rawIDToken) | ||
| if err != nil { | ||
| http.Error(w, "Failed to verify ID Token: "+err.Error(), http.StatusInternalServerError) | ||
| return | ||
| } | ||
|
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| _ = idToken // ID Token is now verified and can be used | ||
|
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| fmt.Println(rawIDToken) | ||
|
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| fmt.Fprintf(w, "Login successful! %s", rawIDToken) | ||
| }) | ||
|
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| fmt.Printf("http://127.0.0.1:%d\n", port) | ||
| log.Fatal(http.ListenAndServe(fmt.Sprintf(":%d", port), nil)) | ||
| } |
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