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86 lines
3.2 KiB
C++
86 lines
3.2 KiB
C++
// Copyright (c) 2014-2016, The Monero Project
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//
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without modification, are
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// permitted provided that the following conditions are met:
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//
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// 1. Redistributions of source code must retain the above copyright notice, this list of
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// conditions and the following disclaimer.
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//
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// 2. Redistributions in binary form must reproduce the above copyright notice, this list
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// of conditions and the following disclaimer in the documentation and/or other
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// materials provided with the distribution.
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//
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// 3. Neither the name of the copyright holder nor the names of its contributors may be
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// used to endorse or promote products derived from this software without specific
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// prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
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// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
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// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
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// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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//
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// Parts of this file are originally copyright (c) 2012-2013 The Cryptonote developers
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#pragma once
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#include <stdint.h>
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#include <stddef.h>
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#define CHACHA8_KEY_SIZE 32
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#define CHACHA8_IV_SIZE 8
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#if defined(__cplusplus)
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#include <memory.h>
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#include "hash.h"
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namespace crypto {
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extern "C" {
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#endif
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void chacha8(const void* data, size_t length, const uint8_t* key, const uint8_t* iv, char* cipher);
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#if defined(__cplusplus)
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}
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#pragma pack(push, 1)
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struct chacha8_key {
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uint8_t data[CHACHA8_KEY_SIZE];
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~chacha8_key()
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{
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memset(data, 0, sizeof(data));
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}
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};
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// MS VC 2012 doesn't interpret `class chacha8_iv` as POD in spite of [9.0.10], so it is a struct
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struct chacha8_iv {
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uint8_t data[CHACHA8_IV_SIZE];
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};
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#pragma pack(pop)
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static_assert(sizeof(chacha8_key) == CHACHA8_KEY_SIZE && sizeof(chacha8_iv) == CHACHA8_IV_SIZE, "Invalid structure size");
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inline void chacha8(const void* data, std::size_t length, const chacha8_key& key, const chacha8_iv& iv, char* cipher) {
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chacha8(data, length, reinterpret_cast<const uint8_t*>(&key), reinterpret_cast<const uint8_t*>(&iv), cipher);
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}
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inline void generate_chacha8_key(const void *data, size_t size, chacha8_key& key) {
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static_assert(sizeof(chacha8_key) <= sizeof(hash), "Size of hash must be at least that of chacha8_key");
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char pwd_hash[HASH_SIZE];
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crypto::cn_slow_hash(data, size, pwd_hash);
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memcpy(&key, pwd_hash, sizeof(key));
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memset(pwd_hash, 0, sizeof(pwd_hash));
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}
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inline void generate_chacha8_key(std::string password, chacha8_key& key) {
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return generate_chacha8_key(password.data(), password.size(), key);
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}
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}
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#endif
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