mirror of
https://github.com/kidfromjupiter/nearby.git
synced 2026-09-15 07:06:11 -04:00
hai007
05ae5583f8
them with chromium ::crypto symbols of the same names. PiperOrigin-RevId: 684566882
95 lines
3.1 KiB
C++
95 lines
3.1 KiB
C++
// Copyright 2020 Google LLC
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// https://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
#ifndef THIRD_PARTY_NEARBY_INTERNAL_CRYPTO_AEAD_H_
|
|
#define THIRD_PARTY_NEARBY_INTERNAL_CRYPTO_AEAD_H_
|
|
|
|
#include <stddef.h>
|
|
#include <stdint.h>
|
|
|
|
#include <optional>
|
|
#include <string>
|
|
#include <vector>
|
|
|
|
#include "absl/strings/string_view.h"
|
|
#include "absl/types/optional.h"
|
|
#include "absl/types/span.h"
|
|
#include "internal/crypto_cros/crypto_export.h"
|
|
#include <openssl/base.h>
|
|
|
|
namespace nearby::crypto {
|
|
|
|
// This class exposes the AES-128-CTR-HMAC-SHA256 and AES_256_GCM AEAD. Note
|
|
// that there are two versions of most methods: an historical version based
|
|
// around |StringPiece| and a more modern version that takes |absl::Span|.
|
|
// Prefer the latter in new code.
|
|
class CRYPTO_EXPORT Aead {
|
|
public:
|
|
enum AeadAlgorithm {
|
|
AES_128_CTR_HMAC_SHA256,
|
|
AES_256_GCM,
|
|
AES_256_GCM_SIV,
|
|
CHACHA20_POLY1305
|
|
};
|
|
|
|
explicit Aead(AeadAlgorithm algorithm);
|
|
Aead(const Aead&) = delete;
|
|
Aead& operator=(const Aead&) = delete;
|
|
~Aead();
|
|
|
|
// Note that Init keeps a reference to the data pointed to by |key| thus that
|
|
// data must outlive this object.
|
|
void Init(absl::Span<const uint8_t> key);
|
|
|
|
// Note that Init keeps a reference to the data pointed to by |key| thus that
|
|
// data must outlive this object.
|
|
void Init(const std::string* key);
|
|
|
|
std::vector<uint8_t> Seal(absl::Span<const uint8_t> plaintext,
|
|
absl::Span<const uint8_t> nonce,
|
|
absl::Span<const uint8_t> additional_data) const;
|
|
|
|
bool Seal(absl::string_view plaintext, absl::string_view nonce,
|
|
absl::string_view additional_data, std::string* ciphertext) const;
|
|
|
|
absl::optional<std::vector<uint8_t>> Open(
|
|
absl::Span<const uint8_t> ciphertext, absl::Span<const uint8_t> nonce,
|
|
absl::Span<const uint8_t> additional_data) const;
|
|
|
|
bool Open(absl::string_view ciphertext, absl::string_view nonce,
|
|
absl::string_view additional_data, std::string* plaintext) const;
|
|
|
|
size_t KeyLength() const;
|
|
|
|
size_t NonceLength() const;
|
|
|
|
private:
|
|
bool Seal(absl::Span<const uint8_t> plaintext,
|
|
absl::Span<const uint8_t> nonce,
|
|
absl::Span<const uint8_t> additional_data, uint8_t* out,
|
|
size_t* output_length, size_t max_output_length) const;
|
|
|
|
bool Open(absl::Span<const uint8_t> ciphertext,
|
|
absl::Span<const uint8_t> nonce,
|
|
absl::Span<const uint8_t> additional_data, uint8_t* out,
|
|
size_t* output_length, size_t max_output_length) const;
|
|
|
|
absl::optional<absl::Span<const uint8_t>> key_;
|
|
const EVP_AEAD* aead_;
|
|
};
|
|
|
|
} // namespace nearby::crypto
|
|
|
|
#endif // THIRD_PARTY_NEARBY_INTERNAL_CRYPTO_AEAD_H_
|