1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
|
/*
Copyright (C) 2024-2025 Selwin van Dijk
This file is part of signalbackup-tools.
signalbackup-tools is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
signalbackup-tools is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with signalbackup-tools. If not, see <https://www.gnu.org/licenses/>.
*/
#ifndef COMMON_BYTES_H_
#define COMMON_BYTES_H_
#include <climits>
#include <memory>
#include <algorithm>
#include <cstddef>
#include <string>
#include <sstream>
#include <iomanip>
#if __cpp_lib_byteswap >= 202110L
#include <bit>
#endif
#include "logger/logger.h"
using std::literals::string_literals::operator""s;
namespace bepaald
{
template <typename T>
inline T swap_endian(T u);
std::string bytesToHexString(std::pair<std::shared_ptr<unsigned char []>, unsigned int> const &data, bool unformatted = false);
std::string bytesToHexString(std::pair<unsigned char *, unsigned int> const &data, bool unformatted = false);
std::string bytesToHexString(unsigned char const *data, unsigned int length, bool unformatted = false);
std::string bytesToString(unsigned char const *data, unsigned int length);
std::string bytesToPrintableString(unsigned char const *data, unsigned int length);
inline bool hexStringToBytes(unsigned char const *in, uint64_t insize, unsigned char *out, uint64_t outsize);
inline bool hexStringToBytes(std::string const &in, unsigned char *out, uint64_t outsize);
}
template <typename T>
inline T bepaald::swap_endian(T u)
{
#if __cpp_lib_byteswap >= 202110L
return std::byteswap(u);
#else
static_assert(CHAR_BIT == 8, "CHAR_BIT != 8");
union
{
T u;
unsigned char u8[sizeof(T)];
} source, dest;
source.u = u;
for (size_t k = 0; k < sizeof(T); ++k)
dest.u8[k] = source.u8[sizeof(T) - k - 1];
return dest.u;
#endif
}
inline std::string bepaald::bytesToHexString(std::pair<std::shared_ptr<unsigned char []>, unsigned int> const &data, bool unformatted)
{
return bytesToHexString(data.first.get(), data.second, unformatted);
}
inline std::string bepaald::bytesToHexString(std::pair<unsigned char *, unsigned int> const &data, bool unformatted/* = false*/)
{
return bytesToHexString(data.first, data.second, unformatted);
}
inline std::string bepaald::bytesToHexString(unsigned char const *data, unsigned int length, bool unformatted/* = false*/)
{
std::ostringstream oss;
if (!unformatted)
oss << "(hex:) ";
for (unsigned int i = 0; i < length; ++i)
oss << std::hex << std::setfill('0') << std::setw(2)
<< (static_cast<int32_t>(data[i]) & 0xFF)
<< ((i == length - 1 || unformatted) ? "" : " ");
return oss.str();
}
inline std::string bepaald::bytesToString(unsigned char const *data, unsigned int length)
{
std::ostringstream oss;
for (unsigned int i = 0; i < length; ++i)
oss << static_cast<char>(data[i]);
return oss.str();
}
inline std::string bepaald::bytesToPrintableString(unsigned char const *data, unsigned int length)
{
bool prevwashex = false;
std::ostringstream oss;
for (unsigned int i = 0; i < length; ++i)
{
bool curishex = !std::isprint(static_cast<char>(data[i]));
if (curishex != prevwashex && i > 0)
oss << " ";
if (curishex)
oss << "0x" << std::hex << std::setfill('0') << std::setw(2)
<< (static_cast<int32_t>(data[i]) & 0xFF)
<< (i == length - 1 ? "" : " ");
else
oss << static_cast<char>(data[i]);
prevwashex = curishex;
}
return oss.str();
}
inline bool bepaald::hexStringToBytes(unsigned char const *in, uint64_t insize, unsigned char *out, uint64_t outsize)
{
if (insize % 2 ||
outsize != insize / 2) [[unlikely]]
{
Logger::error("Invalid size for hex string or output array too small");
out = nullptr;
return false;
}
auto charToInt = [] (char c)
{
if (c <= '9' && c >= '0')
return c - '0';
if (c <= 'F' && c >= 'A')
return c - 'A' + 10;
// if (c <= 'f' && c >= 'a') // lets assume input is valid...
return c - 'a' + 10;
};
uint64_t outpos = 0;
for (unsigned int i = 0; i < insize - 1; i += 2)
out[outpos++] = charToInt(in[i]) * 16 + charToInt(in[i + 1]);
return true;
}
inline bool bepaald::hexStringToBytes(std::string const &in, unsigned char *out, uint64_t outsize)
{
// sanitize input;
std::string input = in;
auto newend = std::remove_if(input.begin(), input.end(), [](char c) {
return (c > '9' || c < '0') && (c > 'F' || c < 'A') && (c > 'f' || c < 'a'); });
input.erase(newend, input.end());
return hexStringToBytes(reinterpret_cast<unsigned char const *>(input.c_str()), input.size(), out, outsize);
}
#endif
|
