1 files changed, 73 insertions, 0 deletions
diff --git a/src/tests/fuzzing/fuzz_gss.c b/src/tests/fuzzing/fuzz_gss.c
new file mode 100644
index 0000000..3c65f34
--- /dev/null
+++ b/src/tests/fuzzing/fuzz_gss.c
@@ -0,0 +1,73 @@
+/* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */
+/* tests/fuzzing/fuzz_gss.c */
+/*
+ * Copyright (C) 2024 by Arjun. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ *
+ * * Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in
+ *   the documentation and/or other materials provided with the
+ *   distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/*
+ * Fuzzing harness implementation for gss_accept_sec_context.
+ */
+
+#include "autoconf.h"
+#include <krb5.h>
+#include <gssapi.h>
+#include <string.h>
+
+#define kMinInputLength 2
+#define kMaxInputLength 1024
+
+extern int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size);
+
+int
+LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
+{
+    gss_OID doid;
+    OM_uint32 minor, ret_flags, time_rec;
+    gss_name_t client = GSS_C_NO_NAME;
+    gss_ctx_id_t context = GSS_C_NO_CONTEXT;
+    gss_cred_id_t deleg_cred = GSS_C_NO_CREDENTIAL;
+    gss_buffer_desc data_in, data_out = GSS_C_EMPTY_BUFFER;
+
+    if (size < kMinInputLength || size > kMaxInputLength)
+        return 0;
+
+    data_in.length = size;
+    data_in.value = (void *)data;
+
+    gss_accept_sec_context(&minor, &context, GSS_C_NO_CREDENTIAL,
+                           &data_in, GSS_C_NO_CHANNEL_BINDINGS, &client,
+                           &doid, &data_out, &ret_flags, &time_rec,
+                           &deleg_cred);
+
+    gss_release_buffer(&minor, &data_out);
+
+    if (context != GSS_C_NO_CONTEXT)
+        gss_delete_sec_context(&minor, &context, GSS_C_NO_BUFFER);
+
+    return 0;
+}