initial commit

internal/config/config.go

@@ -0,0 +1,36 @@
+package config
+
+import (
+	"fmt"
+	"os"
+
+	"gopkg.in/yaml.v3"
+)
+
+func Load(path string) (*Config, error) {
+	b, err := os.ReadFile(path)
+	if err != nil {
+		return nil, err
+	}
+	var c Config
+	if err := yaml.Unmarshal(b, &c); err != nil {
+		return nil, err
+	}
+	return &c, nil
+}
+
+func (c *Config) Validate() error {
+	if c.Server.ExternalURL == "" || c.Server.Listen == "" {
+		return fmt.Errorf("server.external_url and server.listen required")
+	}
+	if len(c.SPs) == 0 {
+		return fmt.Errorf("at least one SP required")
+	}
+	if c.OIDC.Issuer == "" || c.OIDC.ClientID == "" || c.OIDC.RedirectPath == "" {
+		return fmt.Errorf("oidc issuer/client_id/redirect_path required")
+	}
+	if c.Crypto.ActiveKey == "" || len(c.Crypto.Keys) == 0 {
+		return fmt.Errorf("crypto.active_key and at least one key required")
+	}
+	return nil
+}