Initial commit

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

common/googauth/googauth.go

@@ -0,0 +1,32 @@
+package googauth
+
+import "github.com/dgryski/dgoogauth"
+
+const windowSize = 30
+const hotpWindowSize = 5
+
+var HotpCfg = dgoogauth.OTPConfig{
+	Secret:      "MRSHM6LTMFYHAMJSGM2DKNQ=",
+	HotpCounter: 1,
+	WindowSize:  hotpWindowSize,
+}
+
+func New(secret string, name string) string {
+	cfg := &dgoogauth.OTPConfig{
+		Secret:     secret,
+		WindowSize: windowSize,
+	}
+	return cfg.ProvisionURI(name)
+}
+
+func Verify(secret string, pwd string) (bool, error) {
+	cfg := &dgoogauth.OTPConfig{
+		Secret:     secret,
+		WindowSize: windowSize,
+	}
+	return cfg.Authenticate(pwd)
+}
+
+func VerifyHotp(cfg *dgoogauth.OTPConfig, authCode string, counter int) (bool, error) {
+	return cfg.Authenticate(authCode)
+}