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/* -*- 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/. */
#ifndef tls_protection_h_
#define tls_protection_h_
#include <cstdint>
#include <memory>
#include "databuffer.h"
#include "pk11pub.h"
#include "sslt.h"
namespace nss_test {
class TlsRecordHeader;
class AeadCipher {
public:
AeadCipher(CK_MECHANISM_TYPE mech) : mech_(mech), key_(nullptr) {}
virtual ~AeadCipher();
bool Init(PK11SymKey *key, const uint8_t *iv);
virtual bool Aead(bool decrypt, uint64_t seq, const uint8_t *in, size_t inlen,
uint8_t *out, size_t *outlen, size_t maxlen) = 0;
protected:
void FormatNonce(uint64_t seq, uint8_t *nonce);
bool AeadInner(bool decrypt, void *params, size_t param_length,
const uint8_t *in, size_t inlen, uint8_t *out, size_t *outlen,
size_t maxlen);
CK_MECHANISM_TYPE mech_;
PK11SymKey *key_;
uint8_t iv_[12];
};
class AeadCipherChacha20Poly1305 : public AeadCipher {
public:
AeadCipherChacha20Poly1305() : AeadCipher(CKM_NSS_CHACHA20_POLY1305) {}
protected:
bool Aead(bool decrypt, uint64_t seq, const uint8_t *in, size_t inlen,
uint8_t *out, size_t *outlen, size_t maxlen);
};
class AeadCipherAesGcm : public AeadCipher {
public:
AeadCipherAesGcm() : AeadCipher(CKM_AES_GCM) {}
protected:
bool Aead(bool decrypt, uint64_t seq, const uint8_t *in, size_t inlen,
uint8_t *out, size_t *outlen, size_t maxlen);
};
// Our analog of ssl3CipherSpec
class TlsCipherSpec {
public:
TlsCipherSpec() : epoch_(0), aead_() {}
bool Init(uint16_t epoch, SSLCipherAlgorithm cipher, PK11SymKey *key,
const uint8_t *iv);
bool Protect(const TlsRecordHeader &header, const DataBuffer &plaintext,
DataBuffer *ciphertext);
bool Unprotect(const TlsRecordHeader &header, const DataBuffer &ciphertext,
DataBuffer *plaintext);
uint16_t epoch() const { return epoch_; }
private:
uint16_t epoch_;
std::unique_ptr<AeadCipher> aead_;
};
} // namespace nss_test
#endif
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