fuzz: added fuzzer for certificate verification

This also adds a reproducer for CVE-2019-3829.

Resolves: #694

Signed-off-by: Nikos Mavrogiannopoulos <nmav@redhat.com>

5 files changed, 204 insertions, 0 deletions

diff --git a/fuzz/Makefile.am b/fuzz/Makefile.am
index 4af73bc095..32d64d6abc 100644
--- a/fuzz/Makefile.am
+++ b/fuzz/Makefile.am
@@ -9,6 +9,7 @@ LDADD = ../gl/libgnu.la ../lib/libgnutls.la \
  $(LIBS)
 
 FUZZERS = \
+ gnutls_x509_verify_fuzzer$(EXEEXT) \
  gnutls_base64_decoder_fuzzer$(EXEEXT) \
  gnutls_base64_encoder_fuzzer$(EXEEXT) \
  gnutls_client_fuzzer$(EXEEXT) \
@@ -31,6 +32,7 @@ FUZZERS = \
 
 check_PROGRAMS = $(FUZZERS)
 
+gnutls_x509_verify_fuzzer_SOURCES = gnutls_x509_verify_fuzzer.c main.c fuzzer.h
 gnutls_base64_decoder_fuzzer_SOURCES = gnutls_base64_decoder_fuzzer.c main.c fuzzer.h
 gnutls_base64_encoder_fuzzer_SOURCES = gnutls_base64_encoder_fuzzer.c main.c fuzzer.h
 gnutls_client_fuzzer_SOURCES = gnutls_client_fuzzer.c main.c fuzzer.h mem.h certs.h
diff --git a/fuzz/gnutls_x509_verify_fuzzer.c b/fuzz/gnutls_x509_verify_fuzzer.c
new file mode 100644
index 0000000000..645075150a
--- /dev/null
+++ b/fuzz/gnutls_x509_verify_fuzzer.c
@@ -0,0 +1,201 @@
+/*
+ * Copyright (C) 2019 Red Hat, Inc.
+ *
+ * Author: Nikos Mavrogiannopoulos
+ *
+ * This file is part of GnuTLS.
+ *
+ * The GnuTLS is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public License
+ * as published by the Free Software Foundation; either version 2.1 of
+ * the License, or (at your option) any later version.
+ *
+ * This library 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
+ * 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, see <https://www.gnu.org/licenses/>
+ *
+ */
+
+#include <assert.h>
+#include <stdint.h>
+
+#include <gnutls/gnutls.h>
+#include <gnutls/x509.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "fuzzer.h"
+
+unsigned char _ca_der[] = {
+  0x30, 0x82, 0x05, 0xe2, 0x30, 0x82, 0x04, 0xca, 0xa0, 0x03, 0x02, 0x01,
+  0x02, 0x02, 0x10, 0x27, 0x53, 0xf8, 0x06, 0xfe, 0x91, 0x37, 0x32, 0x2f,
+  0x5b, 0x40, 0x9f, 0x1c, 0x31, 0x87, 0x5c, 0x30, 0x0d, 0x06, 0x09, 0x2a,
+  0x86, 0x48, 0x86, 0xf7, 0x0d, 0x01, 0x01, 0x05, 0x05, 0x00, 0x30, 0x81,
+  0xca, 0x31, 0x0b, 0x30, 0x09, 0x06, 0x03, 0x55, 0x04, 0x06, 0x13, 0x02,
+  0x55, 0x53, 0x31, 0x17, 0x30, 0x15, 0x06, 0x03, 0x55, 0x04, 0x0a, 0x13,
+  0x0e, 0x56, 0x65, 0x72, 0x69, 0x53, 0x69, 0x67, 0x6e, 0x2c, 0x20, 0x49,
+  0x6e, 0x63, 0x2e, 0x31, 0x1f, 0x30, 0x1d, 0x06, 0x03, 0x55, 0x04, 0x0b,
+  0x13, 0x16, 0x56, 0x65, 0x72, 0x69, 0x53, 0x69, 0x67, 0x6e, 0x20, 0x54,
+  0x72, 0x75, 0x73, 0x74, 0x20, 0x4e, 0x65, 0x74, 0x77, 0x6f, 0x72, 0x6b,
+  0x31, 0x3a, 0x30, 0x38, 0x06, 0x03, 0x55, 0x04, 0x0b, 0x13, 0x31, 0x28,
+  0x63, 0x29, 0x20, 0x32, 0x30, 0x30, 0x36, 0x20, 0x56, 0x65, 0x72, 0x69,
+  0x53, 0x69, 0x67, 0x6e, 0x2c, 0x20, 0x49, 0x6e, 0x63, 0x2e, 0x20, 0x2d,
+  0x20, 0x46, 0x6f, 0x72, 0x20, 0x61, 0x75, 0x74, 0x68, 0x6f, 0x72, 0x69,
+  0x7a, 0x65, 0x64, 0x20, 0x75, 0x73, 0x65, 0x20, 0x6f, 0x6e, 0x6c, 0x79,
+  0x31, 0x45, 0x30, 0x43, 0x06, 0x03, 0x55, 0x04, 0x03, 0x13, 0x3c, 0x56,
+  0x65, 0x72, 0x69, 0x53, 0x69, 0x67, 0x6e, 0x20, 0x43, 0x6c, 0x61, 0x73,
+  0x73, 0x20, 0x33, 0x20, 0x50, 0x75, 0x62, 0x6c, 0x69, 0x63, 0x20, 0x50,
+  0x72, 0x69, 0x6d, 0x61, 0x72, 0x79, 0x20, 0x43, 0x65, 0x72, 0x74, 0x69,
+  0x66, 0x69, 0x63, 0x61, 0x74, 0x69, 0x6f, 0x6e, 0x20, 0x41, 0x75, 0x74,
+  0x68, 0x6f, 0x72, 0x69, 0x74, 0x79, 0x20, 0x2d, 0x20, 0x47, 0x35, 0x30,
+  0x1e, 0x17, 0x0d, 0x31, 0x30, 0x30, 0x32, 0x30, 0x38, 0x30, 0x30, 0x30,
+  0x30, 0x30, 0x30, 0x5a, 0x17, 0x0d, 0x32, 0x30, 0x30, 0x32, 0x30, 0x37,
+  0x32, 0x33, 0x35, 0x39, 0x35, 0x39, 0x5a, 0x30, 0x81, 0xb4, 0x31, 0x0b,
+  0x30, 0x09, 0x06, 0x03, 0x55, 0x04, 0x06, 0x13, 0x02, 0x55, 0x53, 0x31,
+  0x17, 0x30, 0x15, 0x06, 0x03, 0x55, 0x04, 0x0a, 0x13, 0x0e, 0x56, 0x65,
+  0x72, 0x69, 0x53, 0x69, 0x67, 0x6e, 0x2c, 0x20, 0x49, 0x6e, 0x63, 0x2e,
+  0x31, 0x1f, 0x30, 0x1d, 0x06, 0x03, 0x55, 0x04, 0x0b, 0x13, 0x16, 0x56,
+  0x65, 0x72, 0x69, 0x53, 0x69, 0x67, 0x6e, 0x20, 0x54, 0x72, 0x75, 0x73,
+  0x74, 0x20, 0x4e, 0x65, 0x74, 0x77, 0x6f, 0x72, 0x6b, 0x31, 0x3b, 0x30,
+  0x39, 0x06, 0x03, 0x55, 0x04, 0x0b, 0x13, 0x32, 0x54, 0x65, 0x72, 0x6d,
+  0x73, 0x20, 0x6f, 0x66, 0x20, 0x75, 0x73, 0x65, 0x20, 0x61, 0x74, 0x20,
+  0x68, 0x74, 0x74, 0x70, 0x73, 0x3a, 0x2f, 0x2f, 0x77, 0x77, 0x77, 0x2e,
+  0x76, 0x65, 0x72, 0x69, 0x73, 0x69, 0x67, 0x6e, 0x2e, 0x63, 0x6f, 0x6d,
+  0x2f, 0x72, 0x70, 0x61, 0x20, 0x28, 0x63, 0x29, 0x31, 0x30, 0x31, 0x2e,
+  0x30, 0x2c, 0x06, 0x03, 0x55, 0x04, 0x03, 0x13, 0x25, 0x56, 0x65, 0x72,
+  0x69, 0x53, 0x69, 0x67, 0x6e, 0x20, 0x43, 0x6c, 0x61, 0x73, 0x73, 0x20,
+  0x33, 0x20, 0x43, 0x6f, 0x64, 0x65, 0x20, 0x53, 0x69, 0x67, 0x6e, 0x69,
+  0x6e, 0x67, 0x20, 0x32, 0x30, 0x31, 0x30, 0x20, 0x43, 0x41, 0x30, 0x82,
+  0x01, 0x22, 0x30, 0x0d, 0x06, 0x09, 0x2a, 0x86, 0x48, 0x86, 0xf7, 0x0d,
+  0x01, 0x01, 0x01, 0x05, 0x00, 0x03, 0x82, 0x01, 0x0f, 0x00, 0x30, 0x82,
+  0x01, 0x0a, 0x02, 0x82, 0x01, 0x01, 0x00, 0xf5, 0x23, 0x4b, 0x5e, 0xa5,
+  0xd7, 0x8a, 0xbb, 0x32, 0xe9, 0xd4, 0x57, 0xf7, 0xef, 0xe4, 0xc7, 0x26,
+  0x7e, 0xad, 0x19, 0x98, 0xfe, 0xa8, 0x9d, 0x7d, 0x94, 0xf6, 0x36, 0x6b,
+  0x10, 0xd7, 0x75, 0x81, 0x30, 0x7f, 0x04, 0x68, 0x7f, 0xcb, 0x2b, 0x75,
+  0x1e, 0xcd, 0x1d, 0x08, 0x8c, 0xdf, 0x69, 0x94, 0xa7, 0x37, 0xa3, 0x9c,
+  0x7b, 0x80, 0xe0, 0x99, 0xe1, 0xee, 0x37, 0x4d, 0x5f, 0xce, 0x3b, 0x14,
+  0xee, 0x86, 0xd4, 0xd0, 0xf5, 0x27, 0x35, 0xbc, 0x25, 0x0b, 0x38, 0xa7,
+  0x8c, 0x63, 0x9d, 0x17, 0xa3, 0x08, 0xa5, 0xab, 0xb0, 0xfb, 0xcd, 0x6a,
+  0x62, 0x82, 0x4c, 0xd5, 0x21, 0xda, 0x1b, 0xd9, 0xf1, 0xe3, 0x84, 0x3b,
+  0x8a, 0x2a, 0x4f, 0x85, 0x5b, 0x90, 0x01, 0x4f, 0xc9, 0xa7, 0x76, 0x10,
+  0x7f, 0x27, 0x03, 0x7c, 0xbe, 0xae, 0x7e, 0x7d, 0xc1, 0xdd, 0xf9, 0x05,
+  0xbc, 0x1b, 0x48, 0x9c, 0x69, 0xe7, 0xc0, 0xa4, 0x3c, 0x3c, 0x41, 0x00,
+  0x3e, 0xdf, 0x96, 0xe5, 0xc5, 0xe4, 0x94, 0x71, 0xd6, 0x55, 0x01, 0xc7,
+  0x00, 0x26, 0x4a, 0x40, 0x3c, 0xb5, 0xa1, 0x26, 0xa9, 0x0c, 0xa7, 0x6d,
+  0x80, 0x8e, 0x90, 0x25, 0x7b, 0xcf, 0xbf, 0x3f, 0x1c, 0xeb, 0x2f, 0x96,
+  0xfa, 0xe5, 0x87, 0x77, 0xc6, 0xb5, 0x56, 0xb2, 0x7a, 0x3b, 0x54, 0x30,
+  0x53, 0x1b, 0xdf, 0x62, 0x34, 0xff, 0x1e, 0xd1, 0xf4, 0x5a, 0x93, 0x28,
+  0x85, 0xe5, 0x4c, 0x17, 0x4e, 0x7e, 0x5b, 0xfd, 0xa4, 0x93, 0x99, 0x7f,
+  0xdf, 0xcd, 0xef, 0xa4, 0x75, 0xef, 0xef, 0x15, 0xf6, 0x47, 0xe7, 0xf8,
+  0x19, 0x72, 0xd8, 0x2e, 0x34, 0x1a, 0xa6, 0xb4, 0xa7, 0x4c, 0x7e, 0xbd,
+  0xbb, 0x4f, 0x0c, 0x3d, 0x57, 0xf1, 0x30, 0xd6, 0xa6, 0x36, 0x8e, 0xd6,
+  0x80, 0x76, 0xd7, 0x19, 0x2e, 0xa5, 0xcd, 0x7e, 0x34, 0x2d, 0x89, 0x02,
+  0x03, 0x01, 0x00, 0x01, 0xa3, 0x82, 0x01, 0xd6, 0x30, 0x82, 0x01, 0xd2,
+  0x30, 0x12, 0x06, 0x03, 0x55, 0x1d, 0x13, 0x01, 0x01, 0xff, 0x04, 0x08,
+  0x30, 0x06, 0x01, 0x01, 0xff, 0x02, 0x01, 0x00, 0x30, 0x70, 0x06, 0x03,
+  0x55, 0x1d, 0x20, 0x04, 0x69, 0x30, 0x67, 0x30, 0x65, 0x06, 0x0b, 0x60,
+  0x86, 0x48, 0x01, 0x86, 0xf8, 0x45, 0x01, 0x07, 0x17, 0x03, 0x30, 0x56,
+  0x30, 0x28, 0x06, 0x08, 0x2b, 0x06, 0x01, 0x05, 0x05, 0x07, 0x02, 0x01,
+  0x16, 0x1c, 0x68, 0x74, 0x74, 0x70, 0x73, 0x3a, 0x2f, 0x2f, 0x77, 0x77,
+  0x77, 0x2e, 0x76, 0x65, 0x72, 0x69, 0x73, 0x69, 0x67, 0x6e, 0x2e, 0x63,
+  0x6f, 0x6d, 0x2f, 0x63, 0x70, 0x73, 0x30, 0x2a, 0x06, 0x08, 0x2b, 0x06,
+  0x01, 0x05, 0x05, 0x07, 0x02, 0x02, 0x30, 0x1e, 0x1a, 0x1c, 0x68, 0x74,
+  0x74, 0x70, 0x73, 0x3a, 0x2f, 0x2f, 0x77, 0x77, 0x77, 0x2e, 0x76, 0x65,
+  0x72, 0x69, 0x73, 0x69, 0x67, 0x6e, 0x2e, 0x63, 0x6f, 0x6d, 0x2f, 0x72,
+  0x70, 0x61, 0x30, 0x0e, 0x06, 0x03, 0x55, 0x1d, 0x0f, 0x01, 0x01, 0xff,
+  0x04, 0x04, 0x03, 0x02, 0x01, 0x06, 0x30, 0x6d, 0x06, 0x08, 0x2b, 0x06,
+  0x01, 0x05, 0x05, 0x07, 0x01, 0x0c, 0x04, 0x61, 0x30, 0x5f, 0xa1, 0x5d,
+  0xa0, 0x5b, 0x30, 0x59, 0x30, 0x57, 0x30, 0x55, 0x16, 0x09, 0x69, 0x6d,
+  0x61, 0x67, 0x65, 0x2f, 0x67, 0x69, 0x66, 0x30, 0x21, 0x30, 0x1f, 0x30,
+  0x07, 0x06, 0x05, 0x2b, 0x0e, 0x03, 0x02, 0x1a, 0x04, 0x14, 0x8f, 0xe5,
+  0xd3, 0x1a, 0x86, 0xac, 0x8d, 0x8e, 0x6b, 0xc3, 0xcf, 0x80, 0x6a, 0xd4,
+  0x48, 0x18, 0x2c, 0x7b, 0x19, 0x2e, 0x30, 0x25, 0x16, 0x23, 0x68, 0x74,
+  0x74, 0x70, 0x3a, 0x2f, 0x2f, 0x6c, 0x6f, 0x67, 0x6f, 0x2e, 0x76, 0x65,
+  0x72, 0x69, 0x73, 0x69, 0x67, 0x6e, 0x2e, 0x63, 0x6f, 0x6d, 0x2f, 0x76,
+  0x73, 0x6c, 0x6f, 0x67, 0x6f, 0x2e, 0x67, 0x69, 0x66, 0x30, 0x34, 0x06,
+  0x03, 0x55, 0x1d, 0x1f, 0x04, 0x2d, 0x30, 0x2b, 0x30, 0x29, 0xa0, 0x27,
+  0xa0, 0x25, 0x86, 0x23, 0x68, 0x74, 0x74, 0x70, 0x3a, 0x2f, 0x2f, 0x63,
+  0x72, 0x6c, 0x2e, 0x76, 0x65, 0x72, 0x69, 0x73, 0x69, 0x67, 0x6e, 0x2e,
+  0x63, 0x6f, 0x6d, 0x2f, 0x70, 0x63, 0x61, 0x33, 0x2d, 0x67, 0x35, 0x2e,
+  0x63, 0x72, 0x6c, 0x30, 0x28, 0x06, 0x03, 0x55, 0x1d, 0x11, 0x04, 0x21,
+  0x30, 0x1f, 0xa4, 0x1d, 0x30, 0x1b, 0x31, 0x19, 0x30, 0x17, 0x06, 0x03,
+  0x55, 0x04, 0x03, 0x13, 0x10, 0x56, 0x65, 0x72, 0x69, 0x53, 0x69, 0x67,
+  0x6e, 0x4d, 0x50, 0x4b, 0x49, 0x2d, 0x32, 0x2d, 0x38, 0x30, 0x1d, 0x06,
+  0x03, 0x55, 0x1d, 0x0e, 0x04, 0x16, 0x04, 0x14, 0xcf, 0x99, 0xa9, 0xea,
+  0x7b, 0x26, 0xf4, 0x4b, 0xc9, 0x8e, 0x8f, 0xd7, 0xf0, 0x05, 0x26, 0xef,
+  0xe3, 0xd2, 0xa7, 0x9d, 0x30, 0x2b, 0x06, 0x03, 0x55, 0x1d, 0x25, 0x04,
+  0x24, 0x30, 0x22, 0x06, 0x08, 0x2b, 0x06, 0x01, 0x05, 0x05, 0x07, 0x03,
+  0x02, 0x06, 0x08, 0x2b, 0x06, 0x01, 0x05, 0x05, 0x07, 0x03, 0x03, 0x06,
+  0x0c, 0x2a, 0x86, 0x3a, 0x00, 0x01, 0x83, 0x8f, 0x89, 0x0d, 0x01, 0x01,
+  0x01, 0x30, 0x1f, 0x06, 0x03, 0x55, 0x1d, 0x23, 0x04, 0x18, 0x30, 0x16,
+  0x80, 0x14, 0x7f, 0xd3, 0x65, 0xa7, 0xc2, 0xdd, 0xec, 0xbb, 0xf0, 0x30,
+  0x09, 0xf3, 0x43, 0x39, 0xfa, 0x02, 0xaf, 0x33, 0x31, 0x33, 0x30, 0x0d,
+  0x06, 0x09, 0x2a, 0x86, 0x48, 0x86, 0xf7, 0x0d, 0x01, 0x01, 0x05, 0x05,
+  0x00, 0x03, 0x82, 0x01, 0x01, 0x00, 0x5b, 0x8e, 0x9f, 0xd3, 0xba, 0xbe,
+  0xa9, 0xaf, 0x1a, 0x3e, 0x65, 0x81, 0xb7, 0xc1, 0x64, 0xf6, 0xa2, 0x78,
+  0xeb, 0x4c, 0x80, 0x06, 0x3a, 0xac, 0x22, 0x6e, 0x8c, 0x2b, 0xbc, 0x5d,
+  0x85, 0x7f, 0xc0, 0x8f, 0x10, 0x2a, 0xca, 0xc4, 0xad, 0x96, 0x24, 0x01,
+  0x68, 0xff, 0x65, 0xb5, 0xd1, 0x14, 0x2c, 0x2a, 0xa5, 0xda, 0x49, 0x96,
+  0xaf, 0xe9, 0xd4, 0xff, 0x71, 0x9c, 0x93, 0x09, 0x4a, 0x6a, 0x61, 0xf4,
+  0x4b, 0xd1, 0xcb, 0xb6, 0x5f, 0x29, 0xfc, 0x68, 0x11, 0xe5, 0x72, 0xff,
+  0x46, 0x0f, 0x36, 0x29, 0x99, 0x43, 0x9e, 0xb3, 0xd9, 0xac, 0x47, 0x93,
+  0x7b, 0xef, 0xc4, 0xeb, 0x66, 0x86, 0xa7, 0xd6, 0x89, 0x54, 0x3e, 0x94,
+  0x9b, 0x0d, 0x91, 0xf0, 0xd2, 0x23, 0x6a, 0xc0, 0x0d, 0x37, 0xce, 0x46,
+  0xdf, 0x95, 0xae, 0xa4, 0x65, 0xc6, 0x18, 0xbf, 0xa4, 0x69, 0x73, 0x3f,
+  0xe8, 0x85, 0xd0, 0x48, 0x7d, 0x28, 0xef, 0xf3, 0x5f, 0xb0, 0x01, 0xb4,
+  0x75, 0xb4, 0xd1, 0x53, 0x4b, 0xf4, 0x6f, 0xf6, 0xa4, 0x8b, 0x66, 0xb6,
+  0xef, 0x78, 0x39, 0xc5, 0x88, 0x2b, 0x67, 0x32, 0x1a, 0xef, 0x40, 0xc0,
+  0x94, 0xf6, 0xb7, 0xd2, 0x8b, 0x84, 0xa0, 0x26, 0x6f, 0x8a, 0x4b, 0xc5,
+  0xd8, 0xdc, 0x54, 0xee, 0xe2, 0x4a, 0x56, 0xaa, 0xbc, 0x72, 0xe5, 0x93,
+  0xe6, 0x3f, 0xb6, 0xde, 0x6d, 0x6c, 0x7b, 0x25, 0x5b, 0x01, 0xec, 0x6f,
+  0x29, 0x64, 0xb7, 0xf3, 0x2e, 0x23, 0xf6, 0x1f, 0xae, 0x11, 0x2d, 0xc6,
+  0xba, 0xb9, 0xeb, 0x08, 0x60, 0xb1, 0x2d, 0x1b, 0x2b, 0x9e, 0xbe, 0x85,
+  0x74, 0x0a, 0x1d, 0x2e, 0x2a, 0x52, 0x91, 0x18, 0x20, 0xd7, 0xc9, 0xb2,
+  0x97, 0x84, 0x8f, 0x16, 0x2c, 0x32, 0xca, 0x18, 0x12, 0xaa, 0xc5, 0x20,
+  0x59, 0xca, 0xfb, 0x6d, 0x37, 0x32, 0xe3, 0xc5, 0xa3, 0x84
+};
+unsigned int _ca_der_len = 1510;
+
+int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
+{
+	gnutls_datum_t raw;
+	gnutls_datum_t ca;
+	gnutls_x509_crt_t crt, ca_crt;
+	int ret;
+	unsigned status;
+
+	raw.data = (unsigned char *)data;
+	raw.size = size;
+
+	ca.data = _ca_der;
+	ca.size = _ca_der_len;
+
+	ret = gnutls_x509_crt_init(&ca_crt);
+	assert(ret >= 0);
+
+	ret = gnutls_x509_crt_init(&crt);
+	assert(ret >= 0);
+
+	ret = gnutls_x509_crt_import(ca_crt, &ca, GNUTLS_X509_FMT_DER);
+	if (ret < 0)
+		goto fail;
+
+	ret = gnutls_x509_crt_import(crt, &raw, GNUTLS_X509_FMT_DER);
+	if (ret < 0)
+		goto fail;
+
+	ret = gnutls_x509_crt_list_verify(&crt, 1, &ca_crt, 1, NULL, 0,
+					  GNUTLS_VERIFY_ALLOW_UNSORTED_CHAIN|GNUTLS_VERIFY_ALLOW_BROKEN|
+					  GNUTLS_VERIFY_DISABLE_TRUSTED_TIME_CHECKS,
+					  &status);
+	assert(ret >= 0 || status != 0);
+
+ fail:
+	gnutls_x509_crt_deinit(crt);
+	gnutls_x509_crt_deinit(ca_crt);
+	return 0;
+}
diff --git a/fuzz/gnutls_x509_verify_fuzzer.in/005eb5cbad48e22a4b0c36cd97f1c0225f3eed7f b/fuzz/gnutls_x509_verify_fuzzer.in/005eb5cbad48e22a4b0c36cd97f1c0225f3eed7f
new file mode 100644
index 0000000000..246a9aa565
--- /dev/null
+++ b/fuzz/gnutls_x509_verify_fuzzer.in/005eb5cbad48e22a4b0c36cd97f1c0225f3eed7f
@@ -0,0 +1 @@
+0„
\ No newline at end of file
diff --git a/fuzz/gnutls_x509_verify_fuzzer.in/c2632449b011340199af11389c073d2d380b2e1e b/fuzz/gnutls_x509_verify_fuzzer.in/c2632449b011340199af11389c073d2d380b2e1e
new file mode 100644
index 0000000000..ba9f7c073d
--- /dev/null
+++ b/fuzz/gnutls_x509_verify_fuzzer.in/c2632449b011340199af11389c073d2d380b2e1e
diff --git a/fuzz/gnutls_x509_verify_fuzzer.repro/cacdb69aaf394120d761291f43983336d15c7be3 b/fuzz/gnutls_x509_verify_fuzzer.repro/cacdb69aaf394120d761291f43983336d15c7be3
new file mode 100644
index 0000000000..bad7160bae
--- /dev/null
+++ b/fuzz/gnutls_x509_verify_fuzzer.repro/cacdb69aaf394120d761291f43983336d15c7be3