net/quic/crypto/chacha20_poly1305_decrypter_openssl.cc

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "net/quic/crypto/chacha20_poly1305_decrypter.h"
   6
   7 #include <openssl/evp.h>
   8
   9 namespace net {
  10
  11 namespace {
  12
  13 const size_t kKeySize = 32;
  14 const size_t kNoncePrefixSize = 0;
  15
  16 }  // namespace
  17
  18 ChaCha20Poly1305Decrypter::ChaCha20Poly1305Decrypter()
  19     : AeadBaseDecrypter(EVP_aead_chacha20_poly1305(), kKeySize, kAuthTagSize,
  20                         kNoncePrefixSize) {
  21   static_assert(kKeySize <= kMaxKeySize, "key size too big");
  22   static_assert(kNoncePrefixSize <= kMaxNoncePrefixSize,
  23                 "nonce prefix size too big");
  24 }
  25
  26 ChaCha20Poly1305Decrypter::~ChaCha20Poly1305Decrypter() {}
  27
  28 // static
  29 bool ChaCha20Poly1305Decrypter::IsSupported() { return true; }
  30
  31 }  // namespace net