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-rw-r--r--src/common/util.cpp76
-rw-r--r--src/common/util.h26
-rw-r--r--src/wallet/wallet_rpc_server.cpp49
-rw-r--r--src/wallet/wallet_rpc_server.h3
4 files changed, 101 insertions, 53 deletions
diff --git a/src/common/util.cpp b/src/common/util.cpp
index 046961b06..74a6babf1 100644
--- a/src/common/util.cpp
+++ b/src/common/util.cpp
@@ -39,11 +39,13 @@ using namespace epee;
#include "net/http_client.h" // epee::net_utils::...
#ifdef WIN32
-#include <windows.h>
-#include <shlobj.h>
-#include <strsafe.h>
+ #include <windows.h>
+ #include <shlobj.h>
+ #include <strsafe.h>
#else
-#include <sys/utsname.h>
+ #include <sys/file.h>
+ #include <sys/utsname.h>
+ #include <sys/stat.h>
#endif
#include <boost/filesystem.hpp>
#include <boost/asio.hpp>
@@ -53,7 +55,12 @@ namespace tools
{
std::function<void(int)> signal_handler::m_handler;
- std::unique_ptr<std::FILE, tools::close_file> create_private_file(const std::string& name)
+ private_file::private_file() noexcept : m_handle(), m_filename() {}
+
+ private_file::private_file(std::FILE* handle, std::string&& filename) noexcept
+ : m_handle(handle), m_filename(std::move(filename)) {}
+
+ private_file private_file::create(std::string name)
{
#ifdef WIN32
struct close_handle
@@ -70,17 +77,17 @@ namespace tools
const bool fail = OpenProcessToken(GetCurrentProcess(), TOKEN_QUERY, std::addressof(temp)) == 0;
process.reset(temp);
if (fail)
- return nullptr;
+ return {};
}
DWORD sid_size = 0;
GetTokenInformation(process.get(), TokenOwner, nullptr, 0, std::addressof(sid_size));
if (GetLastError() != ERROR_INSUFFICIENT_BUFFER)
- return nullptr;
+ return {};
std::unique_ptr<char[]> sid{new char[sid_size]};
if (!GetTokenInformation(process.get(), TokenOwner, sid.get(), sid_size, std::addressof(sid_size)))
- return nullptr;
+ return {};
const PSID psid = reinterpret_cast<const PTOKEN_OWNER>(sid.get())->Owner;
const DWORD daclSize =
@@ -88,17 +95,17 @@ namespace tools
const std::unique_ptr<char[]> dacl{new char[daclSize]};
if (!InitializeAcl(reinterpret_cast<PACL>(dacl.get()), daclSize, ACL_REVISION))
- return nullptr;
+ return {};
if (!AddAccessAllowedAce(reinterpret_cast<PACL>(dacl.get()), ACL_REVISION, (READ_CONTROL | FILE_GENERIC_READ | DELETE), psid))
- return nullptr;
+ return {};
SECURITY_DESCRIPTOR descriptor{};
if (!InitializeSecurityDescriptor(std::addressof(descriptor), SECURITY_DESCRIPTOR_REVISION))
- return nullptr;
+ return {};
if (!SetSecurityDescriptorDacl(std::addressof(descriptor), true, reinterpret_cast<PACL>(dacl.get()), false))
- return nullptr;
+ return {};
SECURITY_ATTRIBUTES attributes{sizeof(SECURITY_ATTRIBUTES), std::addressof(descriptor), false};
std::unique_ptr<void, close_handle> file{
@@ -106,7 +113,7 @@ namespace tools
name.c_str(),
GENERIC_WRITE, FILE_SHARE_READ,
std::addressof(attributes),
- CREATE_NEW, FILE_ATTRIBUTE_TEMPORARY,
+ CREATE_NEW, (FILE_ATTRIBUTE_TEMPORARY | FILE_FLAG_DELETE_ON_CLOSE),
nullptr
)
};
@@ -121,22 +128,49 @@ namespace tools
{
_close(fd);
}
- return {real_file, tools::close_file{}};
+ return {real_file, std::move(name)};
}
}
#else
- const int fd = open(name.c_str(), (O_RDWR | O_EXCL | O_CREAT), S_IRUSR);
- if (0 <= fd)
+ const int fdr = open(name.c_str(), (O_RDONLY | O_CREAT), S_IRUSR);
+ if (0 <= fdr)
{
- std::FILE* file = fdopen(fd, "w");
- if (!file)
+ struct stat rstats = {};
+ if (fstat(fdr, std::addressof(rstats)) != 0)
{
- close(fd);
+ close(fdr);
+ return {};
+ }
+ fchmod(fdr, (S_IRUSR | S_IWUSR));
+ const int fdw = open(name.c_str(), O_RDWR);
+ fchmod(fdr, rstats.st_mode);
+ close(fdr);
+
+ if (0 <= fdw)
+ {
+ struct stat wstats = {};
+ if (fstat(fdw, std::addressof(wstats)) == 0 &&
+ rstats.st_dev == wstats.st_dev && rstats.st_ino == wstats.st_ino &&
+ flock(fdw, (LOCK_EX | LOCK_NB)) == 0 && ftruncate(fdw, 0) == 0)
+ {
+ std::FILE* file = fdopen(fdw, "w");
+ if (file) return {file, std::move(name)};
+ }
+ close(fdw);
}
- return {file, tools::close_file{}};
}
#endif
- return nullptr;
+ return {};
+ }
+
+ private_file::~private_file() noexcept
+ {
+ try
+ {
+ boost::system::error_code ec{};
+ boost::filesystem::remove(filename(), ec);
+ }
+ catch (...) {}
}
#ifdef WIN32
diff --git a/src/common/util.h b/src/common/util.h
index 2452bc9d5..48bdbbc28 100644
--- a/src/common/util.h
+++ b/src/common/util.h
@@ -60,8 +60,30 @@ namespace tools
}
};
- //! \return File only readable by owner. nullptr if `filename` exists.
- std::unique_ptr<std::FILE, close_file> create_private_file(const std::string& filename);
+ //! A file restricted to process owner AND process. Deletes file on destruction.
+ class private_file {
+ std::unique_ptr<std::FILE, close_file> m_handle;
+ std::string m_filename;
+
+ private_file(std::FILE* handle, std::string&& filename) noexcept;
+ public:
+
+ //! `handle() == nullptr && filename.empty()`.
+ private_file() noexcept;
+
+ /*! \return File only readable by owner and only used by this process
+ OR `private_file{}` on error. */
+ static private_file create(std::string filename);
+
+ private_file(private_file&&) = default;
+ private_file& operator=(private_file&&) = default;
+
+ //! Deletes `filename()` and closes `handle()`.
+ ~private_file() noexcept;
+
+ std::FILE* handle() const noexcept { return m_handle.get(); }
+ const std::string& filename() const noexcept { return m_filename; }
+ };
/*! \brief Returns the default data directory.
*
diff --git a/src/wallet/wallet_rpc_server.cpp b/src/wallet/wallet_rpc_server.cpp
index 773d12775..9368b8cb6 100644
--- a/src/wallet/wallet_rpc_server.cpp
+++ b/src/wallet/wallet_rpc_server.cpp
@@ -37,7 +37,6 @@ using namespace epee;
#include "wallet/wallet_args.h"
#include "common/command_line.h"
#include "common/i18n.h"
-#include "common/util.h"
#include "cryptonote_basic/cryptonote_format_utils.h"
#include "cryptonote_basic/account.h"
#include "wallet_rpc_server_commands_defs.h"
@@ -70,18 +69,12 @@ namespace tools
}
//------------------------------------------------------------------------------------------------------------------------------
- wallet_rpc_server::wallet_rpc_server():m_wallet(NULL), rpc_login_filename(), m_stop(false), m_trusted_daemon(false)
+ wallet_rpc_server::wallet_rpc_server():m_wallet(NULL), rpc_login_file(), m_stop(false), m_trusted_daemon(false)
{
}
//------------------------------------------------------------------------------------------------------------------------------
wallet_rpc_server::~wallet_rpc_server()
{
- try
- {
- boost::system::error_code ec{};
- boost::filesystem::remove(rpc_login_filename, ec);
- }
- catch (...) {}
}
//------------------------------------------------------------------------------------------------------------------------------
void wallet_rpc_server::set_wallet(wallet2 *cr)
@@ -182,34 +175,32 @@ namespace tools
default_rpc_username,
string_encoding::base64_encode(rand_128bit.data(), rand_128bit.size())
);
+
+ std::string temp = "monero-wallet-rpc." + bind_port + ".login";
+ rpc_login_file = tools::private_file::create(temp);
+ if (!rpc_login_file.handle())
+ {
+ LOG_ERROR(tr("Failed to create file ") << temp << tr(". Check permissions or remove file"));
+ return false;
+ }
+ 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());
+ std::fflush(rpc_login_file.handle());
+ if (std::ferror(rpc_login_file.handle()))
+ {
+ LOG_ERROR(tr("Error writing to file ") << temp);
+ return false;
+ }
+ LOG_PRINT_L0(tr("RPC username/password is stored in file ") << temp);
}
- else
+ else // chosen user/pass
{
http_login.emplace(
std::move(rpc_config->login->username), std::move(rpc_config->login->password).password()
);
}
assert(bool(http_login));
-
- std::string temp = "monero-wallet-rpc." + bind_port + ".login";
- const auto cookie = tools::create_private_file(temp);
- if (!cookie)
- {
- LOG_ERROR(tr("Failed to create file ") << temp << tr(". Check permissions or remove file"));
- return false;
- }
- rpc_login_filename.swap(temp); // nothrow guarantee destructor cleanup
- temp = rpc_login_filename;
- std::fputs(http_login->username.c_str(), cookie.get());
- std::fputc(':', cookie.get());
- std::fputs(http_login->password.c_str(), cookie.get());
- std::fflush(cookie.get());
- if (std::ferror(cookie.get()))
- {
- LOG_ERROR(tr("Error writing to file ") << temp);
- return false;
- }
- LOG_PRINT_L0(tr("RPC username/password is stored in file ") << temp);
} // end auth enabled
m_http_client.set_server(walvars->get_daemon_address(), walvars->get_daemon_login());
diff --git a/src/wallet/wallet_rpc_server.h b/src/wallet/wallet_rpc_server.h
index dd54222b0..e5ed0a846 100644
--- a/src/wallet/wallet_rpc_server.h
+++ b/src/wallet/wallet_rpc_server.h
@@ -33,6 +33,7 @@
#include <boost/program_options/options_description.hpp>
#include <boost/program_options/variables_map.hpp>
#include <string>
+#include "common/util.h"
#include "net/http_server_impl_base.h"
#include "wallet_rpc_server_commands_defs.h"
#include "wallet2.h"
@@ -154,7 +155,7 @@ namespace tools
wallet2 *m_wallet;
std::string m_wallet_dir;
- std::string rpc_login_filename;
+ tools::private_file rpc_login_file;
std::atomic<bool> m_stop;
bool m_trusted_daemon;
epee::net_utils::http::http_simple_client m_http_client;
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-16 05:31:44 +0000