1 files changed, 88 insertions, 0 deletions
diff --git a/security/nss/cpputil/tls_parser.cc b/security/nss/cpputil/tls_parser.cc
new file mode 100644
index 0000000000..efedd7a658
--- /dev/null
+++ b/security/nss/cpputil/tls_parser.cc
@@ -0,0 +1,88 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=2 et sw=2 tw=80: */
+/* 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 "tls_parser.h"
+
+namespace nss_test {
+
+bool TlsParser::Read(uint8_t* val) {
+  if (remaining() < 1) {
+    return false;
+  }
+  *val = *ptr();
+  consume(1);
+  return true;
+}
+
+bool TlsParser::Read(uint32_t* val, size_t size) {
+  if (size > sizeof(uint32_t)) {
+    return false;
+  }
+
+  uint32_t v = 0;
+  for (size_t i = 0; i < size; ++i) {
+    uint8_t tmp;
+    if (!Read(&tmp)) {
+      return false;
+    }
+
+    v = (v << 8) | tmp;
+  }
+
+  *val = v;
+  return true;
+}
+
+bool TlsParser::Read(DataBuffer* val, size_t len) {
+  if (remaining() < len) {
+    return false;
+  }
+
+  val->Assign(ptr(), len);
+  consume(len);
+  return true;
+}
+
+bool TlsParser::ReadFromMark(DataBuffer* val, size_t len, size_t mark) {
+  auto saved = offset_;
+  offset_ = mark;
+
+  if (remaining() < len) {
+    offset_ = saved;
+    return false;
+  }
+
+  val->Assign(ptr(), len);
+
+  offset_ = saved;
+  return true;
+}
+
+bool TlsParser::ReadVariable(DataBuffer* val, size_t len_size) {
+  uint32_t len;
+  if (!Read(&len, len_size)) {
+    return false;
+  }
+  return Read(val, len);
+}
+
+bool TlsParser::Skip(size_t len) {
+  if (len > remaining()) {
+    return false;
+  }
+  consume(len);
+  return true;
+}
+
+bool TlsParser::SkipVariable(size_t len_size) {
+  uint32_t len;
+  if (!Read(&len, len_size)) {
+    return false;
+  }
+  return Skip(len);
+}
+
+}  // namespace nss_test