1 files changed, 42 insertions, 0 deletions
diff --git a/fuzz/punycode.c b/fuzz/punycode.c
new file mode 100644
index 0000000000..76ae3dea0e
--- /dev/null
+++ b/fuzz/punycode.c
@@ -0,0 +1,42 @@
+/*
+ * Copyright 2022 The OpenSSL Project Authors. All Rights Reserved.
+ *
+ * Licensed under the Apache License 2.0 (the "License").  You may not use
+ * this file except in compliance with the License.  You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
+ */
+
+#include "crypto/punycode.h"
+#include "internal/nelem.h"
+#include <openssl/crypto.h>
+#include "fuzzer.h"
+
+#include <stdio.h>
+#include <string.h>
+
+int FuzzerInitialize(int *argc, char ***argv)
+{
+    return 1;
+}
+
+int FuzzerTestOneInput(const uint8_t *buf, size_t len)
+{
+    char *b;
+    unsigned int out[16], outlen = OSSL_NELEM(out);
+    char outc[16];
+
+    b = OPENSSL_malloc(len + 1);
+    if (b != NULL) {
+        ossl_punycode_decode((const char *)buf, len, out, &outlen);
+        memcpy(b, buf, len);
+        b[len] = '\0';
+        ossl_a2ulabel(b, outc, sizeof(outc));
+        OPENSSL_free(b);
+    }
+    return 0;
+}
+
+void FuzzerCleanup(void)
+{
+}