1 files changed, 35 insertions, 0 deletions
diff --git a/auth/challenge.go b/auth/challenge.go
new file mode 100644
index 0000000..60161ee
--- /dev/null
+++ b/auth/challenge.go
@@ -0,0 +1,35 @@
+/*
+macli - Unofficial CLI-Based MyAnimeList Client
+Copyright © 2022 Vidhu Kant Sharma <vidhukant@vidhukant.xyz>
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package auth
+
+import (
+  "time"
+  "math/rand"
+)
+
+var letterRunes = []rune("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789")
+
+func codeChallenge() string {
+    rand.Seed(time.Now().UnixNano())
+    b := make([]rune, 128)
+    for i := range b {
+        b[i] = letterRunes[rand.Intn(len(letterRunes))]
+    }
+    return string(b)
+}