1 files changed, 57 insertions, 0 deletions
diff --git a/security/nss/fuzz/tls_common.cc b/security/nss/fuzz/tls_common.cc
new file mode 100644
index 0000000000..b00ab26bf6
--- /dev/null
+++ b/security/nss/fuzz/tls_common.cc
@@ -0,0 +1,57 @@
+/* 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 "ssl.h"
+#include "sslexp.h"
+
+#include "tls_common.h"
+
+static PRTime FixedTime(void*) { return 1234; }
+
+// Fix the time input, to avoid any time-based variation.
+void FixTime(PRFileDesc* fd) {
+  SECStatus rv = SSL_SetTimeFunc(fd, FixedTime, nullptr);
+  assert(rv == SECSuccess);
+}
+
+PRStatus EnableAllProtocolVersions() {
+  SSLVersionRange supported;
+
+  SECStatus rv = SSL_VersionRangeGetSupported(ssl_variant_stream, &supported);
+  assert(rv == SECSuccess);
+
+  rv = SSL_VersionRangeSetDefault(ssl_variant_stream, &supported);
+  assert(rv == SECSuccess);
+
+  return PR_SUCCESS;
+}
+
+void EnableAllCipherSuites(PRFileDesc* fd) {
+  for (uint16_t i = 0; i < SSL_NumImplementedCiphers; ++i) {
+    SECStatus rv = SSL_CipherPrefSet(fd, SSL_ImplementedCiphers[i], true);
+    assert(rv == SECSuccess);
+  }
+}
+
+void DoHandshake(PRFileDesc* fd, bool isServer) {
+  SECStatus rv = SSL_ResetHandshake(fd, isServer);
+  assert(rv == SECSuccess);
+
+  do {
+    rv = SSL_ForceHandshake(fd);
+  } while (rv != SECSuccess && PR_GetError() == PR_WOULD_BLOCK_ERROR);
+
+  // If the handshake succeeds, let's read some data from the server, if any.
+  if (rv == SECSuccess) {
+    uint8_t block[1024];
+    int32_t nb;
+
+    // Read application data and echo it back.
+    while ((nb = PR_Read(fd, block, sizeof(block))) > 0) {
+      PR_Write(fd, block, nb);
+    }
+  }
+}