Add jumpcloud IdP (#1124)

added intergration with JumpCloud User API. Use the steps in setup.md for configuration.

Additional changes:

- Enhance compatibility for providers that lack audience support in the Authorization Code Flow and the Authorization - - Code Flow with Proof Key for Code Exchange (PKCE) using NETBIRD_DASH_AUTH_USE_AUDIENCE=falseenv
- Verify tokens by utilizing the client ID when audience support is absent in providers

client/internal/auth/pkce_flow.go

@@ -197,7 +197,13 @@ func (p *PKCEAuthorizationFlow) parseOAuthToken(token *oauth2.Token) (TokenInfo,
 		tokenInfo.IDToken = idToken
 	}
 
-	if err := isValidAccessToken(tokenInfo.GetTokenToUse(), p.providerConfig.Audience); err != nil {
+	// if a provider doesn't support an audience, use the Client ID for token verification
+	audience := p.providerConfig.Audience
+	if audience == "" {
+		audience = p.providerConfig.ClientID
+	}
+
+	if err := isValidAccessToken(tokenInfo.GetTokenToUse(), audience); err != nil {
 		return TokenInfo{}, fmt.Errorf("validate access token failed with error: %v", err)
 	}
 

client/internal/pkce_auth.go

@@ -106,9 +106,6 @@ func GetPKCEAuthorizationFlowInfo(ctx context.Context, privateKey string, mgmURL
 
 func isPKCEProviderConfigValid(config PKCEAuthProviderConfig) error {
 	errorMSGFormat := "invalid provider configuration received from management: %s value is empty. Contact your NetBird administrator"
-	if config.Audience == "" {
-		return fmt.Errorf(errorMSGFormat, "Audience")
-	}
 	if config.ClientID == "" {
 		return fmt.Errorf(errorMSGFormat, "Client ID")
 	}