1 files changed, 93 insertions, 0 deletions
diff --git a/src/tests/fuzzing/fuzz_krad.c b/src/tests/fuzzing/fuzz_krad.c
new file mode 100644
index 0000000..dbafbf1
--- /dev/null
+++ b/src/tests/fuzzing/fuzz_krad.c
@@ -0,0 +1,93 @@
+/* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */
+/* tests/fuzzing/fuzz_krad.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 krad_packet_decode_response,
+ * krad_packet_decode_request.
+ */
+
+#include "autoconf.h"
+#include <k5-int.h>
+#include <krad.h>
+
+#define kMinInputLength 2
+#define kMaxInputLength 1024
+
+static krad_packet *packets[3];
+
+static const krad_packet *
+iterator(void *data, krb5_boolean cancel)
+{
+    krad_packet *tmp;
+    int *i = data;
+
+    if (cancel || packets[*i] == NULL)
+        return NULL;
+
+    tmp = packets[*i];
+    *i += 1;
+    return tmp;
+}
+
+extern int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size);
+
+int
+LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
+{
+    int i;
+    krb5_context ctx;
+    krb5_data data_in;
+    const char *secret = "f";
+    const krad_packet *req_1 = NULL, *req_2 = NULL;
+    krad_packet *rsp_1 = NULL, *rsp_2 = NULL;
+
+    if (size < kMinInputLength || size > kMaxInputLength)
+        return 0;
+
+    if (krb5_init_context(&ctx) != 0)
+        return 0;
+
+    data_in = make_data((void *)data, size);
+
+    i = 0;
+    krad_packet_decode_response(ctx, secret, &data_in, iterator, &i,
+                                &req_1, &rsp_1);
+
+    i = 0;
+    krad_packet_decode_request(ctx, secret, &data_in, iterator, &i,
+                               &req_2, &rsp_2);
+
+    krad_packet_free(rsp_1);
+    krad_packet_free(rsp_2);
+    krb5_free_context(ctx);
+
+    return 0;
+}