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// Copyright 2014 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/quic/crypto/chacha20_poly1305_decrypter.h"
#include <openssl/evp.h>
#include <openssl/tls1.h>
namespace net {
namespace {
const size_t kKeySize = 32;
const size_t kNoncePrefixSize = 0;
} // namespace
// QUIC currently uses the draft-agl-tls-chacha20poly1305-04 ChaCha20-Poly1305
// construction rather than RFC 7539.
ChaCha20Poly1305Decrypter::ChaCha20Poly1305Decrypter()
: AeadBaseDecrypter(EVP_aead_chacha20_poly1305_old(),
kKeySize,
kAuthTagSize,
kNoncePrefixSize) {
static_assert(kKeySize <= kMaxKeySize, "key size too big");
static_assert(kNoncePrefixSize <= kMaxNoncePrefixSize,
"nonce prefix size too big");
}
ChaCha20Poly1305Decrypter::~ChaCha20Poly1305Decrypter() {}
const char* ChaCha20Poly1305Decrypter::cipher_name() const {
return TLS1_TXT_ECDHE_RSA_WITH_CHACHA20_POLY1305_OLD;
}
uint32_t ChaCha20Poly1305Decrypter::cipher_id() const {
return TLS1_CK_ECDHE_RSA_CHACHA20_POLY1305_OLD;
}
} // namespace net
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