commit 56129a4: [Minor] Return nil if base32 decode fails

[Vsevolod Stakhov]

Author: Vsevolod Stakhov
Date: 2020-07-02 16:42:48 +0100
URL: https://github.com/rspamd/rspamd/commit/56129a44f9f72091ab2b500746f3d0a47ee88b5c (HEAD -> master)

[Minor] Return nil if base32 decode fails

---
 src/lua/lua_util.c | 19 ++++++++++++++-----
 1 file changed, 14 insertions(+), 5 deletions(-)

diff --git a/src/lua/lua_util.c b/src/lua/lua_util.c
index 70236fc2f..d81c574b7 100644
--- a/src/lua/lua_util.c
+++ b/src/lua/lua_util.c
@@ -1232,11 +1232,20 @@ lua_util_decode_base32 (lua_State *L)
 	}
 
 	if (s != NULL) {
-		t = lua_newuserdata (L, sizeof (*t));
-		rspamd_lua_setclass (L, "rspamd{text}", -1);
-		t->start = rspamd_decode_base32 (s, inlen, &outlen, btype);
-		t->len = outlen;
-		t->flags = RSPAMD_TEXT_FLAG_OWN;
+		guchar *decoded;
+
+		decoded = rspamd_decode_base32 (s, inlen, &outlen, btype);
+
+		if (decoded) {
+			t = lua_newuserdata (L, sizeof (*t));
+			rspamd_lua_setclass (L, "rspamd{text}", -1);
+			t->start = (const gchar *)decoded;
+			t->len = outlen;
+			t->flags = RSPAMD_TEXT_FLAG_OWN;
+		}
+		else {
+			lua_pushnil (L);
+		}
 	}
 	else {
 		lua_pushnil (L);