1 files changed, 141 insertions, 0 deletions
diff --git a/nss/fuzz/tls_server_target.cc b/nss/fuzz/tls_server_target.cc
new file mode 100644
index 0000000..0c09020
--- /dev/null
+++ b/nss/fuzz/tls_server_target.cc
@@ -0,0 +1,141 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include <assert.h>
+#include <stdint.h>
+#include <memory>
+
+#include "blapi.h"
+#include "prinit.h"
+#include "ssl.h"
+
+#include "shared.h"
+#include "tls_common.h"
+#include "tls_mutators.h"
+#include "tls_server_certs.h"
+#include "tls_server_config.h"
+#include "tls_socket.h"
+
+#ifdef IS_DTLS
+__attribute__((constructor)) static void set_is_dtls() {
+  TlsMutators::SetIsDTLS();
+}
+#endif
+
+PRFileDesc* ImportFD(PRFileDesc* model, PRFileDesc* fd) {
+#ifdef IS_DTLS
+  return DTLS_ImportFD(model, fd);
+#else
+  return SSL_ImportFD(model, fd);
+#endif
+}
+
+class SSLServerSessionCache {
+ public:
+  SSLServerSessionCache() {
+    assert(SSL_ConfigServerSessionIDCache(1024, 0, 0, ".") == SECSuccess);
+  }
+
+  ~SSLServerSessionCache() {
+    assert(SSL_ShutdownServerSessionIDCache() == SECSuccess);
+  }
+};
+
+static void SetSocketOptions(PRFileDesc* fd,
+                             std::unique_ptr<ServerConfig>& config) {
+  SECStatus rv = SSL_OptionSet(fd, SSL_NO_CACHE, config->EnableCache());
+  assert(rv == SECSuccess);
+
+  rv = SSL_OptionSet(fd, SSL_REUSE_SERVER_ECDHE_KEY, false);
+  assert(rv == SECSuccess);
+
+  rv = SSL_OptionSet(fd, SSL_ENABLE_EXTENDED_MASTER_SECRET,
+                     config->EnableExtendedMasterSecret());
+  assert(rv == SECSuccess);
+
+  rv = SSL_OptionSet(fd, SSL_REQUEST_CERTIFICATE, config->RequestCertificate());
+  assert(rv == SECSuccess);
+
+  rv = SSL_OptionSet(fd, SSL_REQUIRE_CERTIFICATE, config->RequireCertificate());
+  assert(rv == SECSuccess);
+
+  rv = SSL_OptionSet(fd, SSL_ENABLE_DEFLATE, config->EnableDeflate());
+  assert(rv == SECSuccess);
+
+  rv = SSL_OptionSet(fd, SSL_CBC_RANDOM_IV, config->EnableCbcRandomIv());
+  assert(rv == SECSuccess);
+
+  rv = SSL_OptionSet(fd, SSL_REQUIRE_SAFE_NEGOTIATION,
+                     config->RequireSafeNegotiation());
+  assert(rv == SECSuccess);
+
+#ifndef IS_DTLS
+  rv =
+      SSL_OptionSet(fd, SSL_ENABLE_RENEGOTIATION, SSL_RENEGOTIATE_UNRESTRICTED);
+  assert(rv == SECSuccess);
+#endif
+}
+
+static PRStatus InitModelSocket(void* arg) {
+  PRFileDesc* fd = reinterpret_cast<PRFileDesc*>(arg);
+
+  EnableAllProtocolVersions();
+  EnableAllCipherSuites(fd);
+  InstallServerCertificates(fd);
+
+  return PR_SUCCESS;
+}
+
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t len) {
+  static std::unique_ptr<NSSDatabase> db(new NSSDatabase());
+  assert(db != nullptr);
+
+  static std::unique_ptr<SSLServerSessionCache> cache(
+      new SSLServerSessionCache());
+  assert(cache != nullptr);
+
+  std::unique_ptr<ServerConfig> config(new ServerConfig(data, len));
+
+  // Clear the cache. We never want to resume as we couldn't reproduce that.
+  SSL_ClearSessionCache();
+
+  // Reset the RNG state.
+  assert(RNG_RandomUpdate(NULL, 0) == SECSuccess);
+
+  // Create model socket.
+  static ScopedPRFileDesc model(ImportFD(nullptr, PR_NewTCPSocket()));
+  assert(model);
+
+  // Initialize the model socket once.
+  static PRCallOnceType initModelOnce;
+  PR_CallOnceWithArg(&initModelOnce, InitModelSocket, model.get());
+
+  // Create and import dummy socket.
+  std::unique_ptr<DummyPrSocket> socket(new DummyPrSocket(data, len));
+  static PRDescIdentity id = PR_GetUniqueIdentity("fuzz-server");
+  ScopedPRFileDesc fd(DummyIOLayerMethods::CreateFD(id, socket.get()));
+  PRFileDesc* ssl_fd = ImportFD(model.get(), fd.get());
+  assert(ssl_fd == fd.get());
+
+  SetSocketOptions(ssl_fd, config);
+  DoHandshake(ssl_fd, true);
+
+  return 0;
+}
+
+extern "C" size_t LLVMFuzzerCustomMutator(uint8_t* data, size_t size,
+                                          size_t max_size, unsigned int seed) {
+  using namespace TlsMutators;
+  return CustomMutate({DropRecord, ShuffleRecords, DuplicateRecord,
+                       TruncateRecord, FragmentRecord},
+                      data, size, max_size, seed);
+}
+
+extern "C" size_t LLVMFuzzerCustomCrossOver(const uint8_t* data1, size_t size1,
+                                            const uint8_t* data2, size_t size2,
+                                            uint8_t* out, size_t max_out_size,
+                                            unsigned int seed) {
+  return TlsMutators::CrossOver(data1, size1, data2, size2, out, max_out_size,
+                                seed);
+}