OAuth2 Pkce Workflow

1 files changed, 44 insertions, 0 deletions

diff --git a/rest/rest-utils.c b/rest/rest-utils.c
new file mode 100644
index 0000000..939d49e
--- /dev/null
+++ b/rest/rest-utils.c
@@ -0,0 +1,44 @@
+/* rest-utils.c
+ *
+ * Copyright 2021 Günther Wagner <info@gunibert.de>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU Lesser General Public License,
+ * version 2.1, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT ANY
+ * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+ * FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "rest-utils.h"
+
+/**
+ * random_string:
+ * @length: the length of the random string
+ *
+ * Creates a random string from a given alphabeth with length @length
+ *
+ * Returns: (transfer full): a random string
+ */
+gchar *
+random_string (guint length)
+{
+  g_autoptr(GRand) rand = g_rand_new ();
+  gchar *buffer = g_slice_alloc0 (sizeof (gchar) * length + 1);
+  gchar alphabeth[] = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789-._~";
+
+  for (guint i = 0; i < length; i++)
+    {
+      buffer[i] = alphabeth[g_rand_int (rand) % (sizeof (alphabeth) - 1)];
+    }
+  buffer[length] = '\0';
+
+  return buffer;
+}
+