mirror of
https://github.com/deneraraujo/OpenVPNAdapter.git
synced 2026-04-24 00:00:05 +08:00
Merge commit 'f65d76170b26155358c2fc27686f87e0475f6a94' as 'OpenVPN Adapter/Vendors/openvpn'
This commit is contained in:
Sergey Abramchuk
@@ -0,0 +1,248 @@
|
||||
// OpenVPN -- An application to securely tunnel IP networks
|
||||
// over a single port, with support for SSL/TLS-based
|
||||
// session authentication and key exchange,
|
||||
// packet encryption, packet authentication, and
|
||||
// packet compression.
|
||||
//
|
||||
// Copyright (C) 2012-2017 OpenVPN Technologies, Inc.
|
||||
//
|
||||
// This program is free software: you can redistribute it and/or modify
|
||||
// it under the terms of the GNU General Public License Version 3
|
||||
// as published by the Free Software Foundation.
|
||||
//
|
||||
// This program 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 this program in the COPYING file.
|
||||
// If not, see <http://www.gnu.org/licenses/>.
|
||||
|
||||
// A collection of functions for rendering and parsing hexadecimal strings
|
||||
|
||||
#ifndef OPENVPN_COMMON_HEXSTR_H
|
||||
#define OPENVPN_COMMON_HEXSTR_H
|
||||
|
||||
#include <string>
|
||||
#include <iomanip>
|
||||
#include <sstream>
|
||||
|
||||
#include <openvpn/common/exception.hpp>
|
||||
#include <openvpn/common/string.hpp>
|
||||
|
||||
namespace openvpn {
|
||||
|
||||
inline char render_hex_char(const int c, const bool caps=false)
|
||||
{
|
||||
if (c < 10)
|
||||
return '0' + c;
|
||||
else if (c < 16)
|
||||
return (caps ? 'A' : 'a') - 10 + c;
|
||||
else
|
||||
return '?';
|
||||
}
|
||||
|
||||
inline int parse_hex_char(const char c)
|
||||
{
|
||||
if (c >= '0' && c <= '9')
|
||||
return c - '0';
|
||||
else if (c >= 'a' && c <= 'f')
|
||||
return c - 'a' + 10;
|
||||
else if (c >= 'A' && c <= 'F')
|
||||
return c - 'A' + 10;
|
||||
else
|
||||
return -1;
|
||||
}
|
||||
|
||||
class RenderHexByte
|
||||
{
|
||||
public:
|
||||
RenderHexByte(const unsigned char byte, const bool caps=false)
|
||||
{
|
||||
c[0] = render_hex_char(byte >> 4, caps);
|
||||
c[1] = render_hex_char(byte & 0x0F, caps);
|
||||
}
|
||||
|
||||
char char1() const { return c[0]; }
|
||||
char char2() const { return c[1]; }
|
||||
|
||||
const char *str2() const { return c; } // Note: length=2, NOT null terminated
|
||||
|
||||
private:
|
||||
char c[2];
|
||||
};
|
||||
|
||||
inline std::string render_hex(const unsigned char *data, size_t size, const bool caps=false)
|
||||
{
|
||||
if (!data)
|
||||
return "NULL";
|
||||
std::string ret;
|
||||
ret.reserve(size*2+1);
|
||||
while (size--)
|
||||
{
|
||||
const RenderHexByte b(*data++, caps);
|
||||
ret += b.char1();
|
||||
ret += b.char2();
|
||||
}
|
||||
return ret;
|
||||
}
|
||||
|
||||
inline std::string render_hex_sep(const unsigned char *data, size_t size, const char sep, const bool caps=false)
|
||||
{
|
||||
if (!data)
|
||||
return "NULL";
|
||||
std::string ret;
|
||||
ret.reserve(size*3);
|
||||
bool prsep = false;
|
||||
while (size--)
|
||||
{
|
||||
if (prsep)
|
||||
ret += sep;
|
||||
const RenderHexByte b(*data++, caps);
|
||||
ret += b.char1();
|
||||
ret += b.char2();
|
||||
prsep = true;
|
||||
}
|
||||
return ret;
|
||||
}
|
||||
|
||||
template <typename V>
|
||||
inline std::string render_hex_generic(const V& data, const bool caps=false)
|
||||
{
|
||||
std::string ret;
|
||||
ret.reserve(data.size()*2+1);
|
||||
for (size_t i = 0; i < data.size(); ++i)
|
||||
{
|
||||
const RenderHexByte b(data[i], caps);
|
||||
ret += b.char1();
|
||||
ret += b.char2();
|
||||
}
|
||||
return ret;
|
||||
}
|
||||
|
||||
inline std::string dump_hex(const unsigned char *data, size_t size)
|
||||
{
|
||||
if (!data)
|
||||
return "NULL\n";
|
||||
const unsigned int mask = 0x0F; // N bytes per line - 1
|
||||
std::ostringstream os;
|
||||
os << std::hex;
|
||||
std::string chars;
|
||||
size_t i;
|
||||
for (i = 0; i < size; ++i)
|
||||
{
|
||||
if (!(i & mask))
|
||||
{
|
||||
if (i)
|
||||
{
|
||||
os << " " << chars << std::endl;
|
||||
chars.clear();
|
||||
}
|
||||
os << std::setfill(' ') << std::setw(8) << i << ":";
|
||||
}
|
||||
const unsigned char c = data[i];
|
||||
os << ' ' << std::setfill('0') << std::setw(2) << (unsigned int)c;
|
||||
if (string::is_printable(c))
|
||||
chars += c;
|
||||
else
|
||||
chars += '.';
|
||||
}
|
||||
if (i)
|
||||
os << string::spaces(2 + (((i-1) & mask) ^ mask) * 3) << chars << std::endl;
|
||||
return os.str();
|
||||
}
|
||||
|
||||
inline std::string dump_hex(const std::string& str)
|
||||
{
|
||||
return dump_hex((const unsigned char *)str.c_str(), str.length());
|
||||
}
|
||||
|
||||
template <typename V>
|
||||
inline std::string dump_hex(const V& data)
|
||||
{
|
||||
return dump_hex(data.c_data(), data.size());
|
||||
}
|
||||
|
||||
OPENVPN_SIMPLE_EXCEPTION(parse_hex_error);
|
||||
|
||||
template <typename V>
|
||||
inline void parse_hex(V& dest, const std::string& str)
|
||||
{
|
||||
const int len = int(str.length());
|
||||
int i;
|
||||
for (i = 0; i <= len - 2; i += 2)
|
||||
{
|
||||
const int high = parse_hex_char(str[i]);
|
||||
const int low = parse_hex_char(str[i+1]);
|
||||
if (high == -1 || low == -1)
|
||||
throw parse_hex_error();
|
||||
dest.push_back((high<<4) + low);
|
||||
}
|
||||
if (i != len)
|
||||
throw parse_hex_error(); // straggler char
|
||||
}
|
||||
|
||||
// note -- currently doesn't detect overflow
|
||||
template <typename T>
|
||||
inline bool parse_hex_number(const char *str, T& retval)
|
||||
{
|
||||
if (!str[0])
|
||||
return false; // empty string
|
||||
size_t i = 0;
|
||||
T ret = T(0);
|
||||
while (true)
|
||||
{
|
||||
const char c = str[i++];
|
||||
const int hd = parse_hex_char(c);
|
||||
if (hd >= 0)
|
||||
{
|
||||
ret *= T(16);
|
||||
ret += T(hd);
|
||||
}
|
||||
else if (!c)
|
||||
{
|
||||
retval = ret;
|
||||
return true;
|
||||
}
|
||||
else
|
||||
return false; // non-hex-digit
|
||||
}
|
||||
}
|
||||
|
||||
template <typename T>
|
||||
inline bool parse_hex_number(const std::string& str, T& retval)
|
||||
{
|
||||
return parse_hex_number(str.c_str(), retval);
|
||||
}
|
||||
|
||||
template <typename T>
|
||||
inline T parse_hex_number(const std::string& str)
|
||||
{
|
||||
T ret;
|
||||
if (!parse_hex_number<T>(str.c_str(), ret))
|
||||
throw parse_hex_error();
|
||||
return ret;
|
||||
}
|
||||
|
||||
template <typename T>
|
||||
std::string render_hex_number(T value, const bool caps=false)
|
||||
{
|
||||
unsigned char buf[sizeof(T)];
|
||||
for (size_t i = sizeof(T); i --> 0 ;)
|
||||
{
|
||||
buf[i] = value & 0xFF;
|
||||
value >>= 8;
|
||||
}
|
||||
return render_hex(buf, sizeof(T), caps);
|
||||
}
|
||||
|
||||
std::string render_hex_number(unsigned char uc, const bool caps=false)
|
||||
{
|
||||
RenderHexByte b(uc, caps);
|
||||
return std::string(b.str2(), 2);
|
||||
}
|
||||
|
||||
} // namespace openvpn
|
||||
|
||||
#endif // OPENVPN_COMMON_HEXSTR_H
|
||||
Reference in New Issue
Block a user