Imported Upstream version 4.8.0.309

Former-commit-id: 5f9c6ae75f295e057a7d2971f3a6df4656fa8850

external/boringssl/fuzz/client.cc

@@ -0,0 +1,55 @@
+/* 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 <assert.h>
+
+#include <openssl/rand.h>
+#include <openssl/ssl.h>
+
+struct GlobalState {
+  GlobalState() : ctx(SSL_CTX_new(SSLv23_method())) {}
+
+  ~GlobalState() {
+    SSL_CTX_free(ctx);
+  }
+
+  SSL_CTX *const ctx;
+};
+
+static GlobalState g_state;
+
+extern "C" int LLVMFuzzerTestOneInput(uint8_t *buf, size_t len) {
+  RAND_reset_for_fuzzing();
+
+  SSL *client = SSL_new(g_state.ctx);
+  BIO *in = BIO_new(BIO_s_mem());
+  BIO *out = BIO_new(BIO_s_mem());
+  SSL_set_bio(client, in, out);
+  SSL_set_connect_state(client);
+  SSL_set_renegotiate_mode(client, ssl_renegotiate_freely);
+
+  BIO_write(in, buf, len);
+  if (SSL_do_handshake(client) == 1) {
+    // Keep reading application data until error or EOF.
+    uint8_t tmp[1024];
+    for (;;) {
+      if (SSL_read(client, tmp, sizeof(tmp)) <= 0) {
+        break;
+      }
+    }
+  }
+  SSL_free(client);
+
+  return 0;
+}