init: 1.0.0

pkg/oauth/telegram/model.go

@@ -0,0 +1,30 @@
+package telegram
+
+import "fmt"
+
+type AuthData struct {
+	Id        *int64  `json:"id,omitempty"`
+	FirstName *string `json:"first_name,omitempty"`
+	LastName  *string `json:"last_name,omitempty"`
+	Username  *string `json:"username,omitempty"`
+	PhotoUrl  *string `json:"photo_url,omitempty"`
+	AuthDate  *int64  `json:"auth_date,omitempty"`
+	Hash      *string `json:"hash,omitempty"`
+}
+
+// Validate checks the hash of AuthData with computed one. To compute hash botToken is required.
+// Ref: https://core.telegram.org/widgets/login#checking-authorization
+func (d *AuthData) Validate(botToken []byte) error {
+	if d.Hash == nil {
+		return fmt.Errorf("auth data has no 'hash' value")
+	}
+	if len(botToken) == 0 {
+		return fmt.Errorf("telegram bot token is not provided")
+	}
+	hash := *d.Hash
+	computedHash := computeHash(d, botToken)
+	if hash != computedHash {
+		return fmt.Errorf("hash is not valid")
+	}
+	return nil
+}