From fccee34a1e9ba8069b75c9047ad624a773c5a0d3 Mon Sep 17 00:00:00 2001
From: Pol Henarejos <pol.henarejos@cttc.es>
Date: Mon, 7 Nov 2022 22:26:00 +0100
Subject: [PATCH] In asn1_find_tag(), tag_data and tag_len are not modified if
 not found.

Signed-off-by: Pol Henarejos <pol.henarejos@cttc.es>
---
 src/asn1.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/src/asn1.c b/src/asn1.c
index ea461c8..5a1f74c 100644
--- a/src/asn1.c
+++ b/src/asn1.c
@@ -83,9 +83,14 @@ int walk_tlv(const uint8_t *cdata, size_t cdata_len, uint8_t **p, uint16_t *tag,
 bool asn1_find_tag(const uint8_t *data, size_t data_len, uint16_t itag, size_t *tag_len, uint8_t **tag_data) {
     uint16_t tag = 0x0;
     uint8_t *p = NULL;
-    while (walk_tlv(data, data_len, &p, &tag, tag_len, tag_data)) {
-        if (itag == tag)
+    uint8_t *tdata = NULL;
+    size_t tlen = 0;
+    while (walk_tlv(data, data_len, &p, &tag, &tlen, &tdata)) {
+        if (itag == tag) {
+            *tag_data = tdata;
+            *tag_len = tlen;
             return true;
+        }
     }
     return false;
 }