Project import generated by Copybara.
PiperOrigin-RevId: 237361882
Change-Id: I109a68f44db867b20f8c6a7732b0ce657133e52a
diff --git a/quic/core/crypto/null_encrypter.cc b/quic/core/crypto/null_encrypter.cc
new file mode 100644
index 0000000..9819a31
--- /dev/null
+++ b/quic/core/crypto/null_encrypter.cc
@@ -0,0 +1,88 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "net/third_party/quiche/src/quic/core/crypto/null_encrypter.h"
+
+#include "net/third_party/quiche/src/quic/core/quic_data_writer.h"
+#include "net/third_party/quiche/src/quic/core/quic_utils.h"
+
+namespace quic {
+
+const size_t kHashSizeShort = 12; // size of uint128 serialized short
+
+NullEncrypter::NullEncrypter(Perspective perspective)
+ : perspective_(perspective) {}
+
+bool NullEncrypter::SetKey(QuicStringPiece key) {
+ return key.empty();
+}
+
+bool NullEncrypter::SetNoncePrefix(QuicStringPiece nonce_prefix) {
+ return nonce_prefix.empty();
+}
+
+bool NullEncrypter::SetIV(QuicStringPiece iv) {
+ return iv.empty();
+}
+
+bool NullEncrypter::EncryptPacket(uint64_t /*packet_number*/,
+ QuicStringPiece associated_data,
+ QuicStringPiece plaintext,
+ char* output,
+ size_t* output_length,
+ size_t max_output_length) {
+ const size_t len = plaintext.size() + GetHashLength();
+ if (max_output_length < len) {
+ return false;
+ }
+ QuicUint128 hash;
+ if (perspective_ == Perspective::IS_SERVER) {
+ hash =
+ QuicUtils::FNV1a_128_Hash_Three(associated_data, plaintext, "Server");
+ } else {
+ hash =
+ QuicUtils::FNV1a_128_Hash_Three(associated_data, plaintext, "Client");
+ }
+ // TODO(ianswett): memmove required for in place encryption. Placing the
+ // hash at the end would allow use of memcpy, doing nothing for in place.
+ memmove(output + GetHashLength(), plaintext.data(), plaintext.length());
+ QuicUtils::SerializeUint128Short(hash,
+ reinterpret_cast<unsigned char*>(output));
+ *output_length = len;
+ return true;
+}
+
+size_t NullEncrypter::GetKeySize() const {
+ return 0;
+}
+
+size_t NullEncrypter::GetNoncePrefixSize() const {
+ return 0;
+}
+
+size_t NullEncrypter::GetIVSize() const {
+ return 0;
+}
+
+size_t NullEncrypter::GetMaxPlaintextSize(size_t ciphertext_size) const {
+ return ciphertext_size - GetHashLength();
+}
+
+size_t NullEncrypter::GetCiphertextSize(size_t plaintext_size) const {
+ return plaintext_size + GetHashLength();
+}
+
+QuicStringPiece NullEncrypter::GetKey() const {
+ return QuicStringPiece();
+}
+
+QuicStringPiece NullEncrypter::GetNoncePrefix() const {
+ return QuicStringPiece();
+}
+
+size_t NullEncrypter::GetHashLength() const {
+ return kHashSizeShort;
+}
+
+} // namespace quic
