56 lines
1.6 KiB
C++
56 lines
1.6 KiB
C++
// Copyright (c) 2011-2014 The Cryptonote developers
|
|
// Distributed under the MIT/X11 software license, see the accompanying
|
|
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
|
|
|
|
#pragma once
|
|
|
|
#include <stdint.h>
|
|
#include <stddef.h>
|
|
|
|
#define CHACHA8_KEY_SIZE 32
|
|
#define CHACHA8_IV_SIZE 8
|
|
|
|
#if defined(__cplusplus)
|
|
#include <memory.h>
|
|
|
|
#include "hash.h"
|
|
|
|
namespace crypto {
|
|
extern "C" {
|
|
#endif
|
|
void chacha8(const void* data, size_t length, const uint8_t* key, const uint8_t* iv, char* cipher);
|
|
#if defined(__cplusplus)
|
|
}
|
|
|
|
#pragma pack(push, 1)
|
|
struct chacha8_key {
|
|
uint8_t data[CHACHA8_KEY_SIZE];
|
|
|
|
~chacha8_key()
|
|
{
|
|
memset(data, 0, sizeof(data));
|
|
}
|
|
};
|
|
|
|
// MS VC 2012 doesn't interpret `class chacha8_iv` as POD in spite of [9.0.10], so it is a struct
|
|
struct chacha8_iv {
|
|
uint8_t data[CHACHA8_IV_SIZE];
|
|
};
|
|
#pragma pack(pop)
|
|
|
|
static_assert(sizeof(chacha8_key) == CHACHA8_KEY_SIZE && sizeof(chacha8_iv) == CHACHA8_IV_SIZE, "Invalid structure size");
|
|
|
|
inline void chacha8(const void* data, std::size_t length, const chacha8_key& key, const chacha8_iv& iv, char* cipher) {
|
|
chacha8(data, length, reinterpret_cast<const uint8_t*>(&key), reinterpret_cast<const uint8_t*>(&iv), cipher);
|
|
}
|
|
|
|
inline void generate_chacha8_key(crypto::cn_context &context, std::string password, chacha8_key& key) {
|
|
static_assert(sizeof(chacha8_key) <= sizeof(hash), "Size of hash must be at least that of chacha8_key");
|
|
crypto::hash pwd_hash;
|
|
crypto::cn_slow_hash(context, password.data(), password.size(), pwd_hash);
|
|
memcpy(&key, &pwd_hash, sizeof(key));
|
|
memset(&pwd_hash, 0, sizeof(pwd_hash));
|
|
}
|
|
}
|
|
|
|
#endif
|