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easylogging++: sanitize log payload 

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Reported by itsunixiknowthis
This commit is contained in:
moneromooo-monero 2020-04-28 13:28:55 +00:00
parent 309211fd6a
commit f52697729d
No known key found for this signature in database
GPG Key ID: 686F07454D6CEFC3
4 changed files with 216 additions and 71 deletions
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96
external/easylogging++/easylogging++.cc vendored
View File

@ -2475,6 +2475,100 @@ void DefaultLogDispatchCallback::handle(const LogDispatchData* data) {
}
}
template<typename Transform>
static inline std::string utf8canonical(const std::string &s, Transform t = [](wint_t c)->wint_t { return c; })
{
std::string sc = "";
size_t avail = s.size();
const char *ptr = s.data();
wint_t cp = 0;
int bytes = 1;
char wbuf[8], *wptr;
while (avail--)
{
if ((*ptr & 0x80) == 0)
{
cp = *ptr++;
bytes = 1;
}
else if ((*ptr & 0xe0) == 0xc0)
{
if (avail < 1)
throw std::runtime_error("Invalid UTF-8");
cp = (*ptr++ & 0x1f) << 6;
cp |= *ptr++ & 0x3f;
--avail;
bytes = 2;
}
else if ((*ptr & 0xf0) == 0xe0)
{
if (avail < 2)
throw std::runtime_error("Invalid UTF-8");
cp = (*ptr++ & 0xf) << 12;
cp |= (*ptr++ & 0x3f) << 6;
cp |= *ptr++ & 0x3f;
avail -= 2;
bytes = 3;
}
else if ((*ptr & 0xf8) == 0xf0)
{
if (avail < 3)
throw std::runtime_error("Invalid UTF-8");
cp = (*ptr++ & 0x7) << 18;
cp |= (*ptr++ & 0x3f) << 12;
cp |= (*ptr++ & 0x3f) << 6;
cp |= *ptr++ & 0x3f;
avail -= 3;
bytes = 4;
}
else
throw std::runtime_error("Invalid UTF-8");
cp = t(cp);
if (cp <= 0x7f)
bytes = 1;
else if (cp <= 0x7ff)
bytes = 2;
else if (cp <= 0xffff)
bytes = 3;
else if (cp <= 0x10ffff)
bytes = 4;
else
throw std::runtime_error("Invalid code point UTF-8 transformation");
wptr = wbuf;
switch (bytes)
{
case 1: *wptr++ = cp; break;
case 2: *wptr++ = 0xc0 | (cp >> 6); *wptr++ = 0x80 | (cp & 0x3f); break;
case 3: *wptr++ = 0xe0 | (cp >> 12); *wptr++ = 0x80 | ((cp >> 6) & 0x3f); *wptr++ = 0x80 | (cp & 0x3f); break;
case 4: *wptr++ = 0xf0 | (cp >> 18); *wptr++ = 0x80 | ((cp >> 12) & 0x3f); *wptr++ = 0x80 | ((cp >> 6) & 0x3f); *wptr++ = 0x80 | (cp & 0x3f); break;
default: throw std::runtime_error("Invalid UTF-8");
}
*wptr = 0;
sc.append(wbuf, bytes);
cp = 0;
bytes = 1;
}
return sc;
}
void sanitize(std::string &s)
{
s = utf8canonical(s, [](wint_t c)->wint_t {
if (c == 9 || c == 10 || c == 13)
return c;
if (c < 0x20)
return '?';
if (c == 0x7f)
return '?';
if (c >= 0x80 && c <= 0x9f)
return '?';
return c;
});
}
void DefaultLogDispatchCallback::dispatch(base::type::string_t&& rawLinePrefix, base::type::string_t&& rawLinePayload, base::type::string_t&& logLine) {
if (m_data->dispatchAction() == base::DispatchAction::NormalLog || m_data->dispatchAction() == base::DispatchAction::FileOnlyLog) {
if (m_data->logMessage()->logger()->m_typedConfigurations->toFile(m_data->logMessage()->level())) {
@ -2506,6 +2600,8 @@ void DefaultLogDispatchCallback::dispatch(base::type::string_t&& rawLinePrefix,
m_data->logMessage()->logger()->logBuilder()->setColor(el::base::utils::colorFromLevel(level), false);
ELPP_COUT << rawLinePrefix;
m_data->logMessage()->logger()->logBuilder()->setColor(color == el::Color::Default ? el::base::utils::colorFromLevel(level): color, color != el::Color::Default);
try { sanitize(rawLinePayload); }
catch (const std::exception &e) { rawLinePayload = "<Invalid UTF-8 in log>"; }
ELPP_COUT << rawLinePayload;
m_data->logMessage()->logger()->logBuilder()->setColor(el::Color::Default, false);
ELPP_COUT << std::flush;

3
src/common/CMakeLists.txt
View File

@ -86,7 +86,8 @@ set(common_private_headers
updates.h
aligned.h
timings.h
combinator.h)
combinator.h
utf8.h)
monero_private_headers(common
${common_private_headers})

114
src/common/utf8.h Normal file
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@ -0,0 +1,114 @@
// Copyright (c) 2019, The Monero Project
//
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without modification, are
// permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice, this list of
// conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright notice, this list
// of conditions and the following disclaimer in the documentation and/or other
// materials provided with the distribution.
//
// 3. Neither the name of the copyright holder nor the names of its contributors may be
// used to endorse or promote products derived from this software without specific
// prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#pragma once
#include <cctype>
#include <cwchar>
#include <stdexcept>
namespace tools
{
template<typename T, typename Transform>
inline T utf8canonical(const T &s, Transform t = [](wint_t c)->wint_t { return c; })
{
T sc = "";
size_t avail = s.size();
const char *ptr = s.data();
wint_t cp = 0;
int bytes = 1;
char wbuf[8], *wptr;
while (avail--)
{
if ((*ptr & 0x80) == 0)
{
cp = *ptr++;
bytes = 1;
}
else if ((*ptr & 0xe0) == 0xc0)
{
if (avail < 1)
throw std::runtime_error("Invalid UTF-8");
cp = (*ptr++ & 0x1f) << 6;
cp |= *ptr++ & 0x3f;
--avail;
bytes = 2;
}
else if ((*ptr & 0xf0) == 0xe0)
{
if (avail < 2)
throw std::runtime_error("Invalid UTF-8");
cp = (*ptr++ & 0xf) << 12;
cp |= (*ptr++ & 0x3f) << 6;
cp |= *ptr++ & 0x3f;
avail -= 2;
bytes = 3;
}
else if ((*ptr & 0xf8) == 0xf0)
{
if (avail < 3)
throw std::runtime_error("Invalid UTF-8");
cp = (*ptr++ & 0x7) << 18;
cp |= (*ptr++ & 0x3f) << 12;
cp |= (*ptr++ & 0x3f) << 6;
cp |= *ptr++ & 0x3f;
avail -= 3;
bytes = 4;
}
else
throw std::runtime_error("Invalid UTF-8");
cp = t(cp);
if (cp <= 0x7f)
bytes = 1;
else if (cp <= 0x7ff)
bytes = 2;
else if (cp <= 0xffff)
bytes = 3;
else if (cp <= 0x10ffff)
bytes = 4;
else
throw std::runtime_error("Invalid code point UTF-8 transformation");
wptr = wbuf;
switch (bytes)
{
case 1: *wptr++ = cp; break;
case 2: *wptr++ = 0xc0 | (cp >> 6); *wptr++ = 0x80 | (cp & 0x3f); break;
case 3: *wptr++ = 0xe0 | (cp >> 12); *wptr++ = 0x80 | ((cp >> 6) & 0x3f); *wptr++ = 0x80 | (cp & 0x3f); break;
case 4: *wptr++ = 0xf0 | (cp >> 18); *wptr++ = 0x80 | ((cp >> 12) & 0x3f); *wptr++ = 0x80 | ((cp >> 6) & 0x3f); *wptr++ = 0x80 | (cp & 0x3f); break;
default: throw std::runtime_error("Invalid UTF-8");
}
*wptr = 0;
sc.append(wbuf, bytes);
cp = 0;
bytes = 1;
}
return sc;
}
}

74
src/mnemonics/language_base.h
View File

@ -41,6 +41,7 @@
#include <boost/algorithm/string.hpp>
#include "misc_log_ex.h"
#include "fnv1.h"
#include "common/utf8.h"
/*!
* \namespace Language
@ -73,78 +74,11 @@ namespace Language
return prefix;
}
template<typename T>
inline T utf8canonical(const T &s)
{
T sc = "";
size_t avail = s.size();
const char *ptr = s.data();
wint_t cp = 0;
int bytes = 1;
char wbuf[8], *wptr;
while (avail--)
{
if ((*ptr & 0x80) == 0)
{
cp = *ptr++;
bytes = 1;
}
else if ((*ptr & 0xe0) == 0xc0)
{
if (avail < 1)
throw std::runtime_error("Invalid UTF-8");
cp = (*ptr++ & 0x1f) << 6;
cp |= *ptr++ & 0x3f;
--avail;
bytes = 2;
}
else if ((*ptr & 0xf0) == 0xe0)
{
if (avail < 2)
throw std::runtime_error("Invalid UTF-8");
cp = (*ptr++ & 0xf) << 12;
cp |= (*ptr++ & 0x3f) << 6;
cp |= *ptr++ & 0x3f;
avail -= 2;
bytes = 3;
}
else if ((*ptr & 0xf8) == 0xf0)
{
if (avail < 3)
throw std::runtime_error("Invalid UTF-8");
cp = (*ptr++ & 0x7) << 18;
cp |= (*ptr++ & 0x3f) << 12;
cp |= (*ptr++ & 0x3f) << 6;
cp |= *ptr++ & 0x3f;
avail -= 3;
bytes = 4;
}
else
throw std::runtime_error("Invalid UTF-8");
cp = std::towlower(cp);
wptr = wbuf;
switch (bytes)
{
case 1: *wptr++ = cp; break;
case 2: *wptr++ = 0xc0 | (cp >> 6); *wptr++ = 0x80 | (cp & 0x3f); break;
case 3: *wptr++ = 0xe0 | (cp >> 12); *wptr++ = 0x80 | ((cp >> 6) & 0x3f); *wptr++ = 0x80 | (cp & 0x3f); break;
case 4: *wptr++ = 0xf0 | (cp >> 18); *wptr++ = 0x80 | ((cp >> 12) & 0x3f); *wptr++ = 0x80 | ((cp >> 6) & 0x3f); *wptr++ = 0x80 | (cp & 0x3f); break;
default: throw std::runtime_error("Invalid UTF-8");
}
*wptr = 0;
sc += T(wbuf, bytes);
cp = 0;
bytes = 1;
}
return sc;
}
struct WordHash
{
std::size_t operator()(const epee::wipeable_string &s) const
{
const epee::wipeable_string sc = utf8canonical(s);
const epee::wipeable_string sc = tools::utf8canonical(s, [](wint_t c) -> wint_t { return std::towlower(c); });
return epee::fnv::FNV1a(sc.data(), sc.size());
}
};
@ -153,8 +87,8 @@ namespace Language
{
bool operator()(const epee::wipeable_string &s0, const epee::wipeable_string &s1) const
{
const epee::wipeable_string s0c = utf8canonical(s0);
const epee::wipeable_string s1c = utf8canonical(s1);
const epee::wipeable_string s0c = tools::utf8canonical(s0, [](wint_t c) -> wint_t { return std::towlower(c); });
const epee::wipeable_string s1c = tools::utf8canonical(s1, [](wint_t c) -> wint_t { return std::towlower(c); });
return s0c == s1c;
}
};