forked from lthn/blockchain
127 lines
3.8 KiB
C++
127 lines
3.8 KiB
C++
// Copyright (c) 2014-2018 Zano Project
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// Copyright (c) 2014-2018 The Louisdor Project
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// Copyright (c) 2012-2013 The Boolberry developers
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// Copyright (c) 2017-2025 Lethean (https://lt.hn)
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//
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// Licensed under the European Union Public Licence (EUPL) version 1.2.
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// You may obtain a copy of the licence at:
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//
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// https://joinup.ec.europa.eu/software/page/eupl/licence-eupl
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//
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// The EUPL is a copyleft licence that is compatible with the MIT/X11
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// licence used by the original projects; the MIT terms are therefore
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// considered “grandfathered” under the EUPL for this code.
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//
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// SPDX‑License‑Identifier: EUPL-1.2
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//
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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* pass, size_t sz, 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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//TODO: change wallet encryption algo
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crypto::cn_fast_hash(pass, sz, pwd_hash);
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memcpy(&key.data, pwd_hash, sizeof(key.data));
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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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{
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generate_chacha8_key(password.data(), password.size(), key);
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}
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inline bool chacha_crypt(const void* src_buff, size_t sz, void* target_buff, const void* key_buff, size_t key_buff_size)
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{
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crypto::chacha8_key key;
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crypto::chacha8_iv iv;
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memset(&iv, 0, sizeof(iv));
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crypto::generate_chacha8_key(key_buff, key_buff_size, key);
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crypto::chacha8(src_buff, sz, key, iv, (char*)target_buff);
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return true;
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}
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inline bool chacha_crypt(std::string& buff, const std::string& pass)
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{
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std::string decrypted_buff;
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decrypted_buff.resize(buff.size());
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chacha_crypt(buff.data(), buff.size(), (void*)decrypted_buff.data(), pass.data(), pass.size());
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buff = decrypted_buff;
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return true;
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}
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template<typename pod_to_encrypt, typename pod_pass>
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inline bool chacha_crypt(pod_to_encrypt& crypt, const pod_pass& pass)
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{
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std::string buff;
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buff.resize(sizeof(pod_to_encrypt));
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chacha_crypt(&crypt, sizeof(crypt), (void*)buff.data(), &pass, sizeof(pass));
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memcpy(&crypt, buff.data(), sizeof(crypt));
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return true;
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}
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template<typename pod_pass>
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inline bool chacha_crypt(std::string& buff, const pod_pass& pass)
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{
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std::string buff_target;
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buff_target.resize(buff.size());
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chacha_crypt(buff.data(), buff.size(), (void*)buff_target.data(), &pass, sizeof(pass));
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buff = buff_target;
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return true;
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}
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template<typename pod_pass>
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inline std::string chacha_crypt(const std::string& input, const pod_pass& pass)
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{
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std::string result;
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result.resize(input.size());
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if (chacha_crypt(input.data(), input.size(), (void*)result.data(), &pass, sizeof pass))
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return result;
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return "";
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}
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}
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#endif
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