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Merge pull request #2860 

3dffe71b new wipeable_string class to replace std::string passphrases (moneromooo-monero)
7a2a5741 utils: initialize easylogging++ in on_startup (moneromooo-monero)
54950829 use memwipe in a few relevant places (moneromooo-monero)
000666ff add a memwipe function (moneromooo-monero)
This commit is contained in:
Riccardo Spagni 2017-12-16 23:19:27 +02:00
parent ce951ef560 3dffe71b72
commit 6c0953b15a
No known key found for this signature in database
GPG Key ID: 55432DF31CCD4FCD
22 changed files with 528 additions and 69 deletions
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8
CMakeLists.txt
View File

@ -768,3 +768,11 @@ option(BUILD_GUI_DEPS "Build GUI dependencies." OFF)
option(INSTALL_VENDORED_LIBUNBOUND "Install libunbound binary built from source vendored with this repo." OFF)
include(CheckCCompilerFlag)
CHECK_C_COMPILER_FLAG(-std=c11 HAVE_C11)
include(CheckLibraryExists)
check_library_exists(c memset_s "string.h" HAVE_MEMSET_S)
check_library_exists(c explicit_bzero "strings.h" HAVE_EXPLICIT_BZERO)

6
contrib/epee/include/net/http_auth.h
View File

@ -33,7 +33,7 @@
#include <functional>
#include <string>
#include <utility>
#include "wipeable_string.h"
#include "http_base.h"
#undef MONERO_DEFAULT_LOG_CATEGORY
@ -48,12 +48,12 @@ namespace net_utils
struct login
{
login() : username(), password() {}
login(std::string username_, std::string password_)
login(std::string username_, wipeable_string password_)
: username(std::move(username_)), password(std::move(password_))
{}
std::string username;
std::string password;
wipeable_string password;
};
//! Implements RFC 2617 digest auth. Digests from RFC 7616 can be added.

70
contrib/epee/include/wipeable_string.h Normal file
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@ -0,0 +1,70 @@
// Copyright (c) 2017, 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 <stddef.h>
#include <vector>
#include <string>
namespace epee
{
class wipeable_string
{
public:
wipeable_string() {}
wipeable_string(const wipeable_string &other);
wipeable_string(wipeable_string &&other);
wipeable_string(const std::string &other);
wipeable_string(std::string &&other);
wipeable_string(const char *s);
~wipeable_string();
void wipe();
void push_back(char c);
void pop_back();
const char *data() const noexcept { return buffer.data(); }
size_t size() const noexcept { return buffer.size(); }
bool empty() const noexcept { return buffer.empty(); }
void resize(size_t sz);
void reserve(size_t sz);
void clear();
bool operator==(const wipeable_string &other) const noexcept { return buffer == other.buffer; }
bool operator!=(const wipeable_string &other) const noexcept { return buffer != other.buffer; }
wipeable_string &operator=(wipeable_string &&other);
wipeable_string &operator=(const wipeable_string &other);
static void set_wipe(void *(*f)(void*, size_t)) { wipefunc = f; }
private:
void grow(size_t sz, size_t reserved = 0);
private:
std::vector<char> buffer;
static void *(*wipefunc)(void*, size_t);
};
}

2
contrib/epee/src/CMakeLists.txt
View File

@ -26,7 +26,7 @@
# 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.
add_library(epee STATIC hex.cpp http_auth.cpp mlog.cpp net_utils_base.cpp string_tools.cpp)
add_library(epee STATIC hex.cpp http_auth.cpp mlog.cpp net_utils_base.cpp string_tools.cpp wipeable_string.cpp)
if (USE_READLINE AND GNU_READLINE_FOUND)
add_library(epee_readline STATIC readline_buffer.cpp)
endif()

8
contrib/epee/src/http_auth.cpp
View File

@ -125,6 +125,14 @@ namespace
{
(*this)(boost::string_ref(arg));
}
void operator()(const epee::wipeable_string& arg) const
{
md5::MD5Update(
std::addressof(ctx),
reinterpret_cast<const std::uint8_t*>(arg.data()),
arg.size()
);
}
md5::MD5_CTX& ctx;
};

146
contrib/epee/src/wipeable_string.cpp Normal file
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@ -0,0 +1,146 @@
// Copyright (c) 2017, 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.
#include <string.h>
#include "misc_log_ex.h"
#include "wipeable_string.h"
namespace epee
{
void *(*wipeable_string::wipefunc)(void*, size_t) = NULL;
wipeable_string::wipeable_string(const wipeable_string &other):
buffer(other.buffer)
{
}
wipeable_string::wipeable_string(wipeable_string &&other)
{
if (&other == this)
return;
buffer = std::move(other.buffer);
}
wipeable_string::wipeable_string(const std::string &other)
{
grow(other.size());
memcpy(buffer.data(), other.c_str(), size());
}
wipeable_string::wipeable_string(std::string &&other)
{
CHECK_AND_ASSERT_THROW_MES(wipefunc, "wipefunc is not set");
grow(other.size());
memcpy(buffer.data(), other.c_str(), size());
if (!other.empty())
{
wipefunc(&other[0], other.size()); // we're kinda left with this again aren't we
other = std::string();
}
}
wipeable_string::wipeable_string(const char *s)
{
grow(strlen(s));
memcpy(buffer.data(), s, size());
}
wipeable_string::~wipeable_string()
{
wipe();
}
void wipeable_string::wipe()
{
CHECK_AND_ASSERT_THROW_MES(wipefunc, "wipefunc is not set");
wipefunc(buffer.data(), buffer.size() * sizeof(char));
}
void wipeable_string::grow(size_t sz, size_t reserved)
{
CHECK_AND_ASSERT_THROW_MES(wipefunc, "wipefunc is not set");
if (reserved == 0)
reserved = sz;
CHECK_AND_ASSERT_THROW_MES(reserved >= sz, "reserved < sz");
if (reserved <= buffer.capacity())
return;
size_t old_sz = buffer.size();
std::unique_ptr<char[]> tmp{new char[old_sz]};
memcpy(tmp.get(), buffer.data(), old_sz * sizeof(char));
wipefunc(buffer.data(), old_sz * sizeof(char));
buffer.reserve(reserved);
buffer.resize(sz);
memcpy(buffer.data(), tmp.get(), sz * sizeof(char));
wipefunc(tmp.get(), old_sz * sizeof(char));
}
void wipeable_string::push_back(char c)
{
grow(size() + 1);
buffer.push_back(c);
}
void wipeable_string::pop_back()
{
resize(size() - 1);
}
void wipeable_string::resize(size_t sz)
{
CHECK_AND_ASSERT_THROW_MES(wipefunc, "wipefunc is not set");
if (sz < buffer.size())
wipefunc(buffer.data() + sz, buffer.size() - sz);
grow(sz);
}
void wipeable_string::reserve(size_t sz)
{
grow(size(), sz);
}
void wipeable_string::clear()
{
resize(0);
}
wipeable_string &wipeable_string::operator=(wipeable_string &&other)
{
if (&other != this)
buffer = std::move(other.buffer);
return *this;
}
wipeable_string &wipeable_string::operator=(const wipeable_string &other)
{
if (&other != this)
buffer = other.buffer;
return *this;
}
}

6
src/common/CMakeLists.txt
View File

@ -35,6 +35,7 @@ set(common_sources
download.cpp
util.cpp
i18n.cpp
memwipe.c
password.cpp
perf_timer.cpp
threadpool.cpp
@ -63,6 +64,7 @@ set(common_private_headers
util.h
varint.h
i18n.h
memwipe.h
password.h
perf_timer.h
stack_trace.h
@ -90,5 +92,9 @@ target_link_libraries(common
${OPENSSL_LIBRARIES}
${EXTRA_LIBRARIES})
if(HAVE_C11)
SET_PROPERTY(SOURCE memwipe.c PROPERTY COMPILE_FLAGS -std=c11)
endif()
#monero_install_headers(common
# ${common_headers})

106
src/common/memwipe.c Normal file
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@ -0,0 +1,106 @@
// Copyright (c) 2017, 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.
//
// Parts of this file Copyright (c) 2009-2015 The Bitcoin Core developers
#define __STDC_WANT_LIB_EXT1__ 1
#include <string.h>
#include <stdlib.h>
#ifdef HAVE_EXPLICIT_BZERO
#include <strings.h>
#endif
#include "memwipe.h"
#if defined(_MSC_VER)
#define SCARECROW \
__asm;
#else
#define SCARECROW \
__asm__ __volatile__("" : : "r"(ptr) : "memory");
#endif
#ifdef HAVE_MEMSET_S
void *memwipe(void *ptr, size_t n)
{
if (memset_s(ptr, n, 0, n))
{
abort();
}
SCARECROW // might as well...
return ptr;
}
#elif defined HAVE_EXPLICIT_BZERO
void *memwipe(void *ptr, size_t n)
{
explicit_bzero(ptr, n);
SCARECROW
return ptr;
}
#else
/* The memory_cleanse implementation is taken from Bitcoin */
/* Compilers have a bad habit of removing "superfluous" memset calls that
* are trying to zero memory. For example, when memset()ing a buffer and
* then free()ing it, the compiler might decide that the memset is
* unobservable and thus can be removed.
*
* Previously we used OpenSSL which tried to stop this by a) implementing
* memset in assembly on x86 and b) putting the function in its own file
* for other platforms.
*
* This change removes those tricks in favour of using asm directives to
* scare the compiler away. As best as our compiler folks can tell, this is
* sufficient and will continue to be so.
*
* Adam Langley <agl@google.com>
* Commit: ad1907fe73334d6c696c8539646c21b11178f20f
* BoringSSL (LICENSE: ISC)
*/
static void memory_cleanse(void *ptr, size_t len)
{
memset(ptr, 0, len);
/* As best as we can tell, this is sufficient to break any optimisations that
might try to eliminate "superfluous" memsets. If there's an easy way to
detect memset_s, it would be better to use that. */
SCARECROW
}
void *memwipe(void *ptr, size_t n)
{
memory_cleanse(ptr, n);
SCARECROW
return ptr;
}
#endif

41
src/common/memwipe.h Normal file
View File

@ -0,0 +1,41 @@
// Copyright (c) 2017, 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.
//
// Parts of this file are originally copyright (c) 2012-2013 The Cryptonote developers
#pragma once
#ifdef __cplusplus
extern "C" {
#endif
void *memwipe(void *src, size_t n);
#ifdef __cplusplus
}
#endif

37
src/common/password.cpp
View File

@ -46,6 +46,8 @@
#include "readline_buffer.h"
#endif
#include "common/memwipe.h"
namespace
{
#if defined(_WIN32)
@ -54,7 +56,7 @@ namespace
return 0 != _isatty(_fileno(stdin));
}
bool read_from_tty(std::string& pass)
bool read_from_tty(epee::wipeable_string& pass)
{
static constexpr const char BACKSPACE = 8;
@ -86,8 +88,7 @@ namespace
{
if (!pass.empty())
{
pass.back() = '\0';
pass.resize(pass.size() - 1);
pass.pop_back();
}
}
else
@ -125,7 +126,7 @@ namespace
return ch;
}
bool read_from_tty(std::string& aPass)
bool read_from_tty(epee::wipeable_string& aPass)
{
static constexpr const char BACKSPACE = 127;
@ -146,8 +147,7 @@ namespace
{
if (!aPass.empty())
{
aPass.back() = '\0';
aPass.resize(aPass.size() - 1);
aPass.pop_back();
}
}
else
@ -161,14 +161,7 @@ namespace
#endif // end !WIN32
void clear(std::string& pass) noexcept
{
//! TODO Call a memory wipe function that hopefully is not optimized out
pass.replace(0, pass.capacity(), pass.capacity(), '\0');
pass.clear();
}
bool read_from_tty(const bool verify, const char *message, std::string& pass1, std::string& pass2)
bool read_from_tty(const bool verify, const char *message, epee::wipeable_string& pass1, epee::wipeable_string& pass2)
{
while (true)
{
@ -184,8 +177,8 @@ namespace
if(pass1!=pass2)
{
std::cout << "Passwords do not match! Please try again." << std::endl;
clear(pass1);
clear(pass2);
pass1.clear();
pass2.clear();
}
else //new password matches
return true;
@ -198,7 +191,7 @@ namespace
return false;
}
bool read_from_file(std::string& pass)
bool read_from_file(epee::wipeable_string& pass)
{
pass.reserve(tools::password_container::max_password_size);
for (size_t i = 0; i < tools::password_container::max_password_size; ++i)
@ -233,7 +226,7 @@ namespace tools
password_container::~password_container() noexcept
{
clear(m_password);
m_password.clear();
}
boost::optional<password_container> password_container::prompt(const bool verify, const char *message)
@ -249,9 +242,8 @@ namespace tools
boost::optional<login> login::parse(std::string&& userpass, bool verify, const std::function<boost::optional<password_container>(bool)> &prompt)
{
login out{};
password_container wipe{std::move(userpass)};
const auto loc = wipe.password().find(':');
const auto loc = userpass.find(':');
if (loc == std::string::npos)
{
auto result = prompt(verify);
@ -262,10 +254,11 @@ namespace tools
}
else
{
out.password = password_container{wipe.password().substr(loc + 1)};
out.password = password_container{userpass.substr(loc + 1)};
}
out.username = wipe.password().substr(0, loc);
out.username = userpass.substr(0, loc);
password_container wipe{std::move(userpass)};
return {std::move(out)};
}
}

6
src/common/password.h
View File

@ -32,6 +32,7 @@
#include <string>
#include <boost/optional/optional.hpp>
#include "wipeable_string.h"
namespace tools
{
@ -58,11 +59,10 @@ namespace tools
password_container& operator=(const password_container&) = delete;
password_container& operator=(password_container&&) = default;
const std::string& password() const noexcept { return m_password; }
const epee::wipeable_string &password() const noexcept { return m_password; }
private:
//! TODO Custom allocator that locks to RAM?
std::string m_password;
epee::wipeable_string m_password;
};
struct login

6
src/common/util.cpp
View File

@ -36,9 +36,11 @@
#include "include_base_utils.h"
#include "file_io_utils.h"
#include "wipeable_string.h"
using namespace epee;
#include "util.h"
#include "memwipe.h"
#include "cryptonote_config.h"
#include "net/http_client.h" // epee::net_utils::...
@ -542,6 +544,10 @@ std::string get_nix_version_display_string()
}
bool on_startup()
{
wipeable_string::set_wipe(&memwipe);
mlog_configure("", true);
sanitize_locale();
#ifdef __GLIBC__

5
src/crypto/chacha8.h
View File

@ -39,6 +39,7 @@
#if defined(__cplusplus)
#include <memory.h>
#include "common/memwipe.h"
#include "hash.h"
namespace crypto {
@ -54,7 +55,7 @@ namespace crypto {
~chacha8_key()
{
memset(data, 0, sizeof(data));
memwipe(data, sizeof(data));
}
};
@ -75,7 +76,7 @@ namespace crypto {
char pwd_hash[HASH_SIZE];
crypto::cn_slow_hash(data, size, pwd_hash);
memcpy(&key, pwd_hash, sizeof(key));
memset(pwd_hash, 0, sizeof(pwd_hash));
memwipe(pwd_hash, sizeof(pwd_hash));
}
inline void generate_chacha8_key(std::string password, chacha8_key& key) {

5
src/cryptonote_basic/cryptonote_format_utils.cpp
View File

@ -32,6 +32,7 @@
using namespace epee;
#include <atomic>
#include "wipeable_string.h"
#include "cryptonote_format_utils.h"
#include "cryptonote_config.h"
#include "crypto/crypto.h"
@ -994,7 +995,7 @@ namespace cryptonote
block_hashes_cached = block_hashes_cached_count;
}
//---------------------------------------------------------------
crypto::secret_key encrypt_key(crypto::secret_key key, const std::string &passphrase)
crypto::secret_key encrypt_key(crypto::secret_key key, const epee::wipeable_string &passphrase)
{
crypto::hash hash;
crypto::cn_slow_hash(passphrase.data(), passphrase.size(), hash);
@ -1002,7 +1003,7 @@ namespace cryptonote
return key;
}
//---------------------------------------------------------------
crypto::secret_key decrypt_key(crypto::secret_key key, const std::string &passphrase)
crypto::secret_key decrypt_key(crypto::secret_key key, const epee::wipeable_string &passphrase)
{
crypto::hash hash;
crypto::cn_slow_hash(passphrase.data(), passphrase.size(), hash);

9
src/cryptonote_basic/cryptonote_format_utils.h
View File

@ -38,6 +38,11 @@
#include "crypto/hash.h"
#include <unordered_map>
namespace epee
{
class wipeable_string;
}
namespace cryptonote
{
//---------------------------------------------------------------
@ -226,8 +231,8 @@ namespace cryptonote
bool is_valid_decomposed_amount(uint64_t amount);
void get_hash_stats(uint64_t &tx_hashes_calculated, uint64_t &tx_hashes_cached, uint64_t &block_hashes_calculated, uint64_t & block_hashes_cached);
crypto::secret_key encrypt_key(crypto::secret_key key, const std::string &passphrase);
crypto::secret_key decrypt_key(crypto::secret_key key, const std::string &passphrase);
crypto::secret_key encrypt_key(crypto::secret_key key, const epee::wipeable_string &passphrase);
crypto::secret_key decrypt_key(crypto::secret_key key, const epee::wipeable_string &passphrase);
#define CHECKED_GET_SPECIFIC_VARIANT(variant_var, specific_type, variable_name, fail_return_val) \
CHECK_AND_ASSERT_MES(variant_var.type() == typeid(specific_type), fail_return_val, "wrong variant type: " << variant_var.type().name() << ", expected " << typeid(specific_type).name()); \
specific_type& variable_name = boost::get<specific_type>(variant_var);

8
src/simplewallet/simplewallet.cpp
View File

@ -433,7 +433,7 @@ bool simple_wallet::print_seed(bool encrypted)
m_wallet->set_seed_language(mnemonic_language);
}
std::string seed_pass;
epee::wipeable_string seed_pass;
if (encrypted)
{
auto pwd_container = tools::password_container::prompt(true, tr("Enter optional seed encryption passphrase, empty to see raw seed"));
@ -1426,7 +1426,7 @@ bool simple_wallet::init(const boost::program_options::variables_map& vm)
auto pwd_container = tools::password_container::prompt(false, tr("Enter seed encryption passphrase, empty if none"));
if (std::cin.eof() || !pwd_container)
return false;
std::string seed_pass = pwd_container->password();
epee::wipeable_string seed_pass = pwd_container->password();
if (!seed_pass.empty())
m_recovery_key = cryptonote::decrypt_key(m_recovery_key, seed_pass);
}
@ -2087,12 +2087,12 @@ bool simple_wallet::open_wallet(const boost::program_options::variables_map& vm)
fail_msg_writer() << tr("wallet file path not valid: ") << m_wallet_file;
return false;
}
std::string password;
epee::wipeable_string password;
try
{
auto rc = tools::wallet2::make_from_file(vm, m_wallet_file, password_prompter);
m_wallet = std::move(rc.first);
password = std::move(rc.second).password();
password = std::move(std::move(rc.second).password());
if (!m_wallet)
{
return false;

32
src/wallet/wallet2.cpp
View File

@ -613,7 +613,7 @@ bool wallet2::is_deterministic() const
return keys_deterministic;
}
//----------------------------------------------------------------------------------------------------
bool wallet2::get_seed(std::string& electrum_words, const std::string &passphrase) const
bool wallet2::get_seed(std::string& electrum_words, const epee::wipeable_string &passphrase) const
{
bool keys_deterministic = is_deterministic();
if (!keys_deterministic)
@ -2150,7 +2150,7 @@ bool wallet2::clear()
* \param watch_only true to save only view key, false to save both spend and view keys
* \return Whether it was successful.
*/
bool wallet2::store_keys(const std::string& keys_file_name, const std::string& password, bool watch_only)
bool wallet2::store_keys(const std::string& keys_file_name, const epee::wipeable_string& password, bool watch_only)
{
std::string account_data;
cryptonote::account_base account = m_account;
@ -2236,7 +2236,7 @@ bool wallet2::store_keys(const std::string& keys_file_name, const std::string& p
// Encrypt the entire JSON object.
crypto::chacha8_key key;
crypto::generate_chacha8_key(password, key);
crypto::generate_chacha8_key(password.data(), password.size(), key);
std::string cipher;
cipher.resize(account_data.size());
keys_file_data.iv = crypto::rand<crypto::chacha8_iv>();
@ -2266,7 +2266,7 @@ namespace
* \param keys_file_name Name of wallet file
* \param password Password of wallet file
*/
bool wallet2::load_keys(const std::string& keys_file_name, const std::string& password)
bool wallet2::load_keys(const std::string& keys_file_name, const epee::wipeable_string& password)
{
wallet2::keys_file_data keys_file_data;
std::string buf;
@ -2277,7 +2277,7 @@ bool wallet2::load_keys(const std::string& keys_file_name, const std::string& pa
r = ::serialization::parse_binary(buf, keys_file_data);
THROW_WALLET_EXCEPTION_IF(!r, error::wallet_internal_error, "internal error: failed to deserialize \"" + keys_file_name + '\"');
crypto::chacha8_key key;
crypto::generate_chacha8_key(password, key);
crypto::generate_chacha8_key(password.data(), password.size(), key);
std::string account_data;
account_data.resize(keys_file_data.account_data.size());
crypto::chacha8(keys_file_data.account_data.data(), keys_file_data.account_data.size(), key, keys_file_data.iv, &account_data[0]);
@ -2401,7 +2401,7 @@ bool wallet2::load_keys(const std::string& keys_file_name, const std::string& pa
* can be used prior to rewriting wallet keys file, to ensure user has entered the correct password
*
*/
bool wallet2::verify_password(const std::string& password) const
bool wallet2::verify_password(const epee::wipeable_string& password) const
{
return verify_password(m_keys_file, password, m_watch_only);
}
@ -2418,7 +2418,7 @@ bool wallet2::verify_password(const std::string& password) const
* can be used prior to rewriting wallet keys file, to ensure user has entered the correct password
*
*/
bool wallet2::verify_password(const std::string& keys_file_name, const std::string& password, bool watch_only)
bool wallet2::verify_password(const std::string& keys_file_name, const epee::wipeable_string& password, bool watch_only)
{
wallet2::keys_file_data keys_file_data;
std::string buf;
@ -2429,7 +2429,7 @@ bool wallet2::verify_password(const std::string& keys_file_name, const std::stri
r = ::serialization::parse_binary(buf, keys_file_data);
THROW_WALLET_EXCEPTION_IF(!r, error::wallet_internal_error, "internal error: failed to deserialize \"" + keys_file_name + '\"');
crypto::chacha8_key key;
crypto::generate_chacha8_key(password, key);
crypto::generate_chacha8_key(password.data(), password.size(), key);
std::string account_data;
account_data.resize(keys_file_data.account_data.size());
crypto::chacha8(keys_file_data.account_data.data(), keys_file_data.account_data.size(), key, keys_file_data.iv, &account_data[0]);
@ -2466,7 +2466,7 @@ bool wallet2::verify_password(const std::string& keys_file_name, const std::stri
* \param two_random Whether it is a non-deterministic wallet
* \return The secret key of the generated wallet
*/
crypto::secret_key wallet2::generate(const std::string& wallet_, const std::string& password,
crypto::secret_key wallet2::generate(const std::string& wallet_, const epee::wipeable_string& password,
const crypto::secret_key& recovery_param, bool recover, bool two_random)
{
clear();
@ -2546,7 +2546,7 @@ crypto::secret_key wallet2::generate(const std::string& wallet_, const std::stri
* \param password Password of wallet file
* \param viewkey view secret key
*/
void wallet2::generate(const std::string& wallet_, const std::string& password,
void wallet2::generate(const std::string& wallet_, const epee::wipeable_string& password,
const cryptonote::account_public_address &account_public_address,
const crypto::secret_key& viewkey)
{
@ -2582,7 +2582,7 @@ void wallet2::generate(const std::string& wallet_, const std::string& password,
* \param spendkey spend secret key
* \param viewkey view secret key
*/
void wallet2::generate(const std::string& wallet_, const std::string& password,
void wallet2::generate(const std::string& wallet_, const epee::wipeable_string& password,
const cryptonote::account_public_address &account_public_address,
const crypto::secret_key& spendkey, const crypto::secret_key& viewkey)
{
@ -2616,7 +2616,7 @@ void wallet2::generate(const std::string& wallet_, const std::string& password,
* \param wallet_name Name of wallet file (should exist)
* \param password Password for wallet file
*/
void wallet2::rewrite(const std::string& wallet_name, const std::string& password)
void wallet2::rewrite(const std::string& wallet_name, const epee::wipeable_string& password)
{
prepare_file_names(wallet_name);
boost::system::error_code ignored_ec;
@ -2629,7 +2629,7 @@ void wallet2::rewrite(const std::string& wallet_name, const std::string& passwor
* \param wallet_name Base name of wallet file
* \param password Password for wallet file
*/
void wallet2::write_watch_only_wallet(const std::string& wallet_name, const std::string& password)
void wallet2::write_watch_only_wallet(const std::string& wallet_name, const epee::wipeable_string& password)
{
prepare_file_names(wallet_name);
boost::system::error_code ignored_ec;
@ -2765,7 +2765,7 @@ bool wallet2::generate_chacha8_key_from_secret_keys(crypto::chacha8_key &key) co
return true;
}
//----------------------------------------------------------------------------------------------------
void wallet2::load(const std::string& wallet_, const std::string& password)
void wallet2::load(const std::string& wallet_, const epee::wipeable_string& password)
{
clear();
prepare_file_names(wallet_);
@ -2916,10 +2916,10 @@ std::string wallet2::path() const
//----------------------------------------------------------------------------------------------------
void wallet2::store()
{
store_to("", "");
store_to("", epee::wipeable_string());
}
//----------------------------------------------------------------------------------------------------
void wallet2::store_to(const std::string &path, const std::string &password)
void wallet2::store_to(const std::string &path, const epee::wipeable_string &password)
{
trim_hashchain();

24
src/wallet/wallet2.h
View File

@ -168,7 +168,7 @@ namespace tools
//! Just parses variables.
static std::unique_ptr<wallet2> make_dummy(const boost::program_options::variables_map& vm, const std::function<boost::optional<password_container>(const char *, bool)> &password_prompter);
static bool verify_password(const std::string& keys_file_name, const std::string& password, bool watch_only);
static bool verify_password(const std::string& keys_file_name, const epee::wipeable_string& password, bool watch_only);
wallet2(bool testnet = false, bool restricted = false) : m_run(true), m_callback(0), m_testnet(testnet), m_always_confirm_transfers(true), m_print_ring_members(false), m_store_tx_info(true), m_default_mixin(0), m_default_priority(0), m_refresh_type(RefreshDefault), m_auto_refresh(true), m_refresh_from_block_height(0), m_confirm_missing_payment_id(true), m_ask_password(true), m_min_output_count(0), m_min_output_value(0), m_merge_destinations(false), m_confirm_backlog(true), m_is_initialized(false), m_restricted(restricted), is_old_file_format(false), m_node_rpc_proxy(m_http_client, m_daemon_rpc_mutex), m_light_wallet(false), m_light_wallet_scanned_block_height(0), m_light_wallet_blockchain_height(0), m_light_wallet_connected(false), m_light_wallet_balance(0), m_light_wallet_unlocked_balance(0) {}
@ -398,7 +398,7 @@ namespace tools
* \param two_random Whether it is a non-deterministic wallet
* \return The secret key of the generated wallet
*/
crypto::secret_key generate(const std::string& wallet, const std::string& password,
crypto::secret_key generate(const std::string& wallet, const epee::wipeable_string& password,
const crypto::secret_key& recovery_param = crypto::secret_key(), bool recover = false,
bool two_random = false);
/*!
@ -408,7 +408,7 @@ namespace tools
* \param viewkey view secret key
* \param spendkey spend secret key
*/
void generate(const std::string& wallet, const std::string& password,
void generate(const std::string& wallet, const epee::wipeable_string& password,
const cryptonote::account_public_address &account_public_address,
const crypto::secret_key& spendkey, const crypto::secret_key& viewkey);
/*!
@ -417,7 +417,7 @@ namespace tools
* \param password Password of wallet file
* \param viewkey view secret key
*/
void generate(const std::string& wallet, const std::string& password,
void generate(const std::string& wallet, const epee::wipeable_string& password,
const cryptonote::account_public_address &account_public_address,
const crypto::secret_key& viewkey = crypto::secret_key());
/*!
@ -425,23 +425,23 @@ namespace tools
* \param wallet_name Name of wallet file (should exist)
* \param password Password for wallet file
*/
void rewrite(const std::string& wallet_name, const std::string& password);
void write_watch_only_wallet(const std::string& wallet_name, const std::string& password);
void load(const std::string& wallet, const std::string& password);
void rewrite(const std::string& wallet_name, const epee::wipeable_string& password);
void write_watch_only_wallet(const std::string& wallet_name, const epee::wipeable_string& password);
void load(const std::string& wallet, const epee::wipeable_string& password);
void store();
/*!
* \brief store_to - stores wallet to another file(s), deleting old ones
* \param path - path to the wallet file (keys and address filenames will be generated based on this filename)
* \param password - password to protect new wallet (TODO: probably better save the password in the wallet object?)
*/
void store_to(const std::string &path, const std::string &password);
void store_to(const std::string &path, const epee::wipeable_string &password);
std::string path() const;
/*!
* \brief verifies given password is correct for default wallet keys file
*/
bool verify_password(const std::string& password) const;
bool verify_password(const epee::wipeable_string& password) const;
cryptonote::account_base& get_account(){return m_account;}
const cryptonote::account_base& get_account()const{return m_account;}
@ -466,7 +466,7 @@ namespace tools
* \brief Checks if deterministic wallet
*/
bool is_deterministic() const;
bool get_seed(std::string& electrum_words, const std::string &passphrase = std::string()) const;
bool get_seed(std::string& electrum_words, const epee::wipeable_string &passphrase = epee::wipeable_string()) const;
/*!
* \brief Checks if light wallet. A light wallet sends view key to a server where the blockchain is scanned.
@ -839,13 +839,13 @@ namespace tools
* \param watch_only true to save only view key, false to save both spend and view keys
* \return Whether it was successful.
*/
bool store_keys(const std::string& keys_file_name, const std::string& password, bool watch_only = false);
bool store_keys(const std::string& keys_file_name, const epee::wipeable_string& password, bool watch_only = false);
/*!
* \brief Load wallet information from wallet file.
* \param keys_file_name Name of wallet file
* \param password Password of wallet file
*/
bool load_keys(const std::string& keys_file_name, const std::string& password);
bool load_keys(const std::string& keys_file_name, const epee::wipeable_string& password);
void process_new_transaction(const crypto::hash &txid, const cryptonote::transaction& tx, const std::vector<uint64_t> &o_indices, uint64_t height, uint64_t ts, bool miner_tx, bool pool, bool double_spend_seen);
void process_new_blockchain_entry(const cryptonote::block& b, const cryptonote::block_complete_entry& bche, const crypto::hash& bl_id, uint64_t height, const cryptonote::COMMAND_RPC_GET_BLOCKS_FAST::block_output_indices &o_indices);
void detach_blockchain(uint64_t height);

3
src/wallet/wallet_rpc_server.cpp
View File

@ -206,7 +206,8 @@ namespace tools
}
std::fputs(http_login->username.c_str(), rpc_login_file.handle());
std::fputc(':', rpc_login_file.handle());
std::fputs(http_login->password.c_str(), rpc_login_file.handle());
const epee::wipeable_string password = http_login->password;
std::fwrite(password.data(), 1, password.size(), rpc_login_file.handle());
std::fflush(rpc_login_file.handle());
if (std::ferror(rpc_login_file.handle()))
{

3
tests/unit_tests/CMakeLists.txt
View File

@ -50,6 +50,7 @@ set(unit_tests_sources
hashchain.cpp
http.cpp
main.cpp
memwipe.cpp
mnemonics.cpp
mul_div.cpp
parse_amount.cpp
@ -101,6 +102,8 @@ if (NOT MSVC)
COMPILE_FLAGS " -Wno-undef -Wno-sign-compare")
endif ()
SET_PROPERTY(SOURCE memwipe.cpp PROPERTY COMPILE_FLAGS -Ofast)
add_test(
NAME unit_tests
COMMAND unit_tests --data-dir "${TEST_DATA_DIR}")

2
tests/unit_tests/http.cpp
View File

@ -211,7 +211,7 @@ std::string get_a1(const http::login& user, const fields& src)
{
const std::string& realm = src.at(u8"realm");
return boost::join(
std::vector<std::string>{user.username, realm, user.password}, u8":"
std::vector<std::string>{user.username, realm, std::string(user.password.data(), user.password.size())}, u8":"
);
}

64
tests/unit_tests/memwipe.cpp Normal file
View File

@ -0,0 +1,64 @@
// Copyright (c) 2017, 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.
#include "gtest/gtest.h"
#include <stdint.h>
#include "misc_log_ex.h"
#include "common/memwipe.h"
// Probably won't catch the optimized out case, but at least we test
// it works in the normal case
static void test(bool wipe)
{
char *foo = (char*)malloc(4);
ASSERT_TRUE(foo != NULL);
intptr_t foop = (intptr_t)foo;
strcpy(foo, "bar");
void *bar = wipe ? memwipe(foo, 3) : memset(foo, 0, 3);
ASSERT_EQ(foo, bar);
free(foo);
char *quux = (char*)malloc(4); // same size, just after free, so we're likely to get the same, depending on the allocator
if ((intptr_t)quux == foop)
{
MDEBUG(std::hex << std::setw(8) << std::setfill('0') << *(uint32_t*)quux);
if (wipe) ASSERT_TRUE(!memcmp(quux, "\0\0\0", 3));
}
else MWARNING("We did not get the same location, cannot check");
free(quux);
}
TEST(memwipe, control)
{
test(false);
}
TEST(memwipe, works)
{
test(true);
}