commit 022f86f108890c14f2cb7e821a1bcdcec29f7f13
author Agathiyan Bragadeesh <agathiyan.bragadeesh2@arm.com> Tue Aug 22 16:56:04 2023 +0100
committer Agathiyan Bragadeesh <agathiyan.bragadeesh2@arm.com> Tue Aug 22 16:56:04 2023 +0100
tree 729268e6d7a4e0a1848cbebee2299d84b87224bd
parent d9d79bb74bd54b2d71dd82cc4951e6ef173e0251

Prevent output of escaped null characters dn gets

Signed-off-by: Agathiyan Bragadeesh <agathiyan.bragadeesh2@arm.com>

library/x509.c

diff --git a/library/x509.c b/library/x509.c
index f574055..42839e8 100644
--- a/library/x509.c
+++ b/library/x509.c
@@ -919,7 +919,10 @@
 
                 c = name->val.p[i];
                 // Special characters requiring escaping, RFC 4514 Section 2.4
-                if (c) {
+                if (c == '\0') {
+                    return MBEDTLS_ERR_X509_INVALID_NAME;
+                }
+                else {
                     if (strchr(",=+<>;\"\\", c) ||
                         ((i == 0) && strchr("# ", c)) ||
                         ((i == name->val.len-1) && (c == ' '))) {