openssl: abstract out OPENSSL_cleanse

This makes it easier for us to replace it if desired, since it's now only in
one spot. Also, it avoids the openssl include from allocators.h, which
essentially forced openssl to be included from every compilation unit.
This commit is contained in:
Cory Fields 2015-01-20 19:23:25 -05:00
parent a9565863e0
commit 1630219d90
13 changed files with 44 additions and 17 deletions

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@ -123,6 +123,7 @@ BITCOIN_CORE_H = \
script/standard.h \ script/standard.h \
serialize.h \ serialize.h \
streams.h \ streams.h \
support/cleanse.h \
sync.h \ sync.h \
threadsafety.h \ threadsafety.h \
timedata.h \ timedata.h \
@ -268,6 +269,7 @@ libbitcoin_util_a_SOURCES = \
compat/strnlen.cpp \ compat/strnlen.cpp \
random.cpp \ random.cpp \
rpcprotocol.cpp \ rpcprotocol.cpp \
support/cleanse.cpp \
sync.cpp \ sync.cpp \
uint256.cpp \ uint256.cpp \
util.cpp \ util.cpp \

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@ -6,6 +6,8 @@
#ifndef BITCOIN_ALLOCATORS_H #ifndef BITCOIN_ALLOCATORS_H
#define BITCOIN_ALLOCATORS_H #define BITCOIN_ALLOCATORS_H
#include "support/cleanse.h"
#include <map> #include <map>
#include <string> #include <string>
#include <string.h> #include <string.h>
@ -14,8 +16,6 @@
#include <boost/thread/mutex.hpp> #include <boost/thread/mutex.hpp>
#include <boost/thread/once.hpp> #include <boost/thread/once.hpp>
#include <openssl/crypto.h> // for OPENSSL_cleanse()
/** /**
* Thread-safe class to keep track of locked (ie, non-swappable) memory pages. * Thread-safe class to keep track of locked (ie, non-swappable) memory pages.
* *
@ -174,7 +174,7 @@ void LockObject(const T& t)
template <typename T> template <typename T>
void UnlockObject(const T& t) void UnlockObject(const T& t)
{ {
OPENSSL_cleanse((void*)(&t), sizeof(T)); memory_cleanse((void*)(&t), sizeof(T));
LockedPageManager::Instance().UnlockRange((void*)(&t), sizeof(T)); LockedPageManager::Instance().UnlockRange((void*)(&t), sizeof(T));
} }
@ -217,7 +217,7 @@ struct secure_allocator : public std::allocator<T> {
void deallocate(T* p, std::size_t n) void deallocate(T* p, std::size_t n)
{ {
if (p != NULL) { if (p != NULL) {
OPENSSL_cleanse(p, sizeof(T) * n); memory_cleanse(p, sizeof(T) * n);
LockedPageManager::Instance().UnlockRange(p, sizeof(T) * n); LockedPageManager::Instance().UnlockRange(p, sizeof(T) * n);
} }
std::allocator<T>::deallocate(p, n); std::allocator<T>::deallocate(p, n);
@ -254,7 +254,7 @@ struct zero_after_free_allocator : public std::allocator<T> {
void deallocate(T* p, std::size_t n) void deallocate(T* p, std::size_t n)
{ {
if (p != NULL) if (p != NULL)
OPENSSL_cleanse(p, sizeof(T) * n); memory_cleanse(p, sizeof(T) * n);
std::allocator<T>::deallocate(p, n); std::allocator<T>::deallocate(p, n);
} }
}; };

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@ -172,7 +172,7 @@ bool CBase58Data::SetString(const char* psz, unsigned int nVersionBytes)
vchData.resize(vchTemp.size() - nVersionBytes); vchData.resize(vchTemp.size() - nVersionBytes);
if (!vchData.empty()) if (!vchData.empty())
memcpy(&vchData[0], &vchTemp[nVersionBytes], vchData.size()); memcpy(&vchData[0], &vchTemp[nVersionBytes], vchData.size());
OPENSSL_cleanse(&vchTemp[0], vchData.size()); memory_cleanse(&vchTemp[0], vchData.size());
return true; return true;
} }

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@ -26,8 +26,8 @@ bool CCrypter::SetKeyFromPassphrase(const SecureString& strKeyData, const std::v
if (i != (int)WALLET_CRYPTO_KEY_SIZE) if (i != (int)WALLET_CRYPTO_KEY_SIZE)
{ {
OPENSSL_cleanse(chKey, sizeof(chKey)); memory_cleanse(chKey, sizeof(chKey));
OPENSSL_cleanse(chIV, sizeof(chIV)); memory_cleanse(chIV, sizeof(chIV));
return false; return false;
} }

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@ -82,8 +82,8 @@ public:
void CleanKey() void CleanKey()
{ {
OPENSSL_cleanse(chKey, sizeof(chKey)); memory_cleanse(chKey, sizeof(chKey));
OPENSSL_cleanse(chIV, sizeof(chIV)); memory_cleanse(chIV, sizeof(chIV));
fKeySet = false; fKeySet = false;
} }

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@ -21,8 +21,6 @@
#include <boost/thread.hpp> #include <boost/thread.hpp>
#include <boost/version.hpp> #include <boost/version.hpp>
#include <openssl/rand.h>
using namespace std; using namespace std;

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@ -13,7 +13,6 @@
#include <stdexcept> #include <stdexcept>
#include <openssl/x509.h>
#include <openssl/x509_vfy.h> #include <openssl/x509_vfy.h>
#include <QDateTime> #include <QDateTime>

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@ -9,6 +9,8 @@
#include "base58.h" #include "base58.h"
#include <openssl/x509.h>
#include <QByteArray> #include <QByteArray>
#include <QList> #include <QList>
#include <QString> #include <QString>

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@ -16,7 +16,6 @@
#include <cstdlib> #include <cstdlib>
#include <openssl/x509.h>
#include <openssl/x509_vfy.h> #include <openssl/x509_vfy.h>
#include <QApplication> #include <QApplication>

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@ -5,6 +5,7 @@
#include "random.h" #include "random.h"
#include "support/cleanse.h"
#ifdef WIN32 #ifdef WIN32
#include "compat.h" // for Windows API #include "compat.h" // for Windows API
#endif #endif
@ -18,7 +19,6 @@
#include <sys/time.h> #include <sys/time.h>
#endif #endif
#include <openssl/crypto.h>
#include <openssl/err.h> #include <openssl/err.h>
#include <openssl/rand.h> #include <openssl/rand.h>
@ -40,7 +40,7 @@ void RandAddSeed()
// Seed with CPU performance counter // Seed with CPU performance counter
int64_t nCounter = GetPerformanceCounter(); int64_t nCounter = GetPerformanceCounter();
RAND_add(&nCounter, sizeof(nCounter), 1.5); RAND_add(&nCounter, sizeof(nCounter), 1.5);
OPENSSL_cleanse((void*)&nCounter, sizeof(nCounter)); memory_cleanse((void*)&nCounter, sizeof(nCounter));
} }
void RandAddSeedPerfmon() void RandAddSeedPerfmon()
@ -70,7 +70,7 @@ void RandAddSeedPerfmon()
RegCloseKey(HKEY_PERFORMANCE_DATA); RegCloseKey(HKEY_PERFORMANCE_DATA);
if (ret == ERROR_SUCCESS) { if (ret == ERROR_SUCCESS) {
RAND_add(begin_ptr(vData), nSize, nSize / 100.0); RAND_add(begin_ptr(vData), nSize, nSize / 100.0);
OPENSSL_cleanse(begin_ptr(vData), nSize); memory_cleanse(begin_ptr(vData), nSize);
LogPrint("rand", "%s: %lu bytes\n", __func__, nSize); LogPrint("rand", "%s: %lu bytes\n", __func__, nSize);
} else { } else {
static bool warned = false; // Warn only once static bool warned = false; // Warn only once

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@ -16,6 +16,7 @@
#include <map> #include <map>
#include <set> #include <set>
#include <stdint.h> #include <stdint.h>
#include <stdio.h>
#include <string> #include <string>
#include <string.h> #include <string.h>
#include <utility> #include <utility>

13
src/support/cleanse.cpp Normal file
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@ -0,0 +1,13 @@
// Copyright (c) 2009-2010 Satoshi Nakamoto
// Copyright (c) 2009-2015 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#include "cleanse.h"
#include <openssl/crypto.h>
void memory_cleanse(void *ptr, size_t len)
{
OPENSSL_cleanse(ptr, len);
}

13
src/support/cleanse.h Normal file
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@ -0,0 +1,13 @@
// Copyright (c) 2009-2010 Satoshi Nakamoto
// Copyright (c) 2009-2015 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#ifndef BITCOIN_SUPPORT_CLEANSE_H
#define BITCOIN_SUPPORT_CLEANSE_H
#include <stdlib.h>
void memory_cleanse(void *ptr, size_t len);
#endif // BITCOIN_SUPPORT_CLEANSE_H