introspect and client assertion

pkg/rp/key.go

@@ -0,0 +1,33 @@
+package rp
+
+import (
+	"encoding/json"
+	"io/ioutil"
+)
+
+const (
+	serviceAccountKey = "serviceaccount"
+	applicationKey    = "application"
+)
+
+type keyFile struct {
+	Type     string `json:"type"` // serviceaccount or application
+	KeyID    string `json:"keyId"`
+	Key      string `json:"key"`
+	Issuer   string `json:"issuer"`
+	ClientID string `json:"clientId"`
+	//TokenURL  string `json:"token_uri"`
+	//ProjectID string `json:"project_id"`
+}
+
+func ConfigFromKeyFile(path string) (*keyFile, error) {
+	data, err := ioutil.ReadFile(path)
+	if err != nil {
+		return nil, err
+	}
+	var f keyFile
+	if err := json.Unmarshal(data, &f); err != nil {
+		return nil, err
+	}
+	return &f, nil
+}