Imported Upstream version 4.8.0.309

Former-commit-id: 5f9c6ae75f295e057a7d2971f3a6df4656fa8850

external/boringssl/fuzz/cert.cc

@@ -0,0 +1,32 @@
+/* Copyright (c) 2016, Google Inc.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
+ * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
+ * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
+ * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */
+
+#include <openssl/mem.h>
+#include <openssl/x509.h>
+
+extern "C" int LLVMFuzzerTestOneInput(uint8_t *buf, size_t len) {
+  const uint8_t *bufp = buf;
+  X509 *x509 = d2i_X509(NULL, &bufp, len);
+  if (x509 != NULL) {
+    /* Extract the public key. */
+    EVP_PKEY_free(X509_get_pubkey(x509));
+
+    /* Reserialize the structure. */
+    uint8_t *der = NULL;
+    i2d_X509(x509, &der);
+    OPENSSL_free(der);
+  }
+  X509_free(x509);
+  return 0;
+}