mirror of
https://github.com/curl/curl.git
synced 2026-05-23 15:56:19 +03:00
066478f634
To safely zero memory, introduce `curlx_memzero()`, and map it to `memset_s()` (C11) or `memset_explicit()` (C23) if auto-detected, or `explicit_bzero()` or `explicit_memset()` for platforms opted-in, or fall back to a local workaround if all unavailable. On Windows, always use `SecureZeroMemory()`, or `SecureZeroMemory2()` with Visual Studio and Windows SDK 10.0.26100.0+. Details above are experimental and may change if they cause issues. Also add macros/functions that zero memory before freeing a buffer: - `curlx_safefreezero()`: for buffers with size. - `curlx_safefreezeroz()`: for null-terminated buffers. - `curlx_freezero()`: for buffers with size. - `curlx_freezeroz()`: for null-terminated buffers. `curlx_memzero()` must not be passed a NULL pointer because in some implementations it is undefined behavior. Also: - curl_sha512_256: Replace hard-wired `explicit_memset()` call with new `curlx_memzero()`. Refs: https://en.cppreference.com/c/string/byte/memset https://man7.org/linux/man-pages/man3/explicit_bzero.3.html https://man.freebsd.org/cgi/man.cgi?query=explicit_bzero https://man.netbsd.org/NetBSD-7.2/explicit_memset.3 https://learn.microsoft.com/previous-versions/windows/desktop/legacy/aa366877(v=vs.85) https://learn.microsoft.com/windows/win32/memory/winbase-securezeromemory2 https://learn.microsoft.com/cpp/overview/compiler-versions https://learn.microsoft.com/windows/apps/windows-sdk/downloads https://jtsoya539.github.io/windows-sdk-versions/ Credits-to: Daniel Gustafsson Credits-to: Will Cosgrove and co-authors in libssh2 Ref: #13589 (original attempt) Ref: #21588 Closes #21598
313 lines
8.2 KiB
CMake
313 lines
8.2 KiB
CMake
#***************************************************************************
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# _ _ ____ _
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# Project ___| | | | _ \| |
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# / __| | | | |_) | |
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# | (__| |_| | _ <| |___
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# \___|\___/|_| \_\_____|
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#
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# Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
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#
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# This software is licensed as described in the file COPYING, which
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# you should have received as part of this distribution. The terms
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# are also available at https://curl.se/docs/copyright.html.
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#
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# You may opt to use, copy, modify, merge, publish, distribute and/or sell
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# copies of the Software, and permit persons to whom the Software is
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# furnished to do so, under the terms of the COPYING file.
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#
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# This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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# KIND, either express or implied.
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#
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# SPDX-License-Identifier: curl
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#
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###########################################################################
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# Based on CI runs for Cygwin/MSYS2, Linux, macOS, FreeBSD, NetBSD, OpenBSD
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if(NOT UNIX)
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message(FATAL_ERROR "This file should be included on Unix platforms only")
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endif()
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if(APPLE OR
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CYGWIN)
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set(HAVE_ACCEPT4 0)
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elseif(CMAKE_SYSTEM_NAME STREQUAL "Linux" OR
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CMAKE_SYSTEM_NAME STREQUAL "FreeBSD" OR
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CMAKE_SYSTEM_NAME STREQUAL "NetBSD" OR
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CMAKE_SYSTEM_NAME STREQUAL "OpenBSD")
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set(HAVE_ACCEPT4 1)
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endif()
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set(HAVE_ALARM 1)
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if(ANDROID)
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set(HAVE_ARC4RANDOM 1)
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else()
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set(HAVE_ARC4RANDOM 0)
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endif()
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set(HAVE_ARPA_INET_H 1)
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set(HAVE_ATOMIC 1)
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set(HAVE_BASENAME 1)
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set(HAVE_BOOL_T 1)
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if(NOT APPLE)
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set(HAVE_CLOCK_GETTIME_MONOTONIC 1)
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if(CMAKE_SYSTEM_NAME STREQUAL "Linux")
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set(HAVE_CLOCK_GETTIME_MONOTONIC_RAW 1)
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else()
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set(HAVE_CLOCK_GETTIME_MONOTONIC_RAW 0)
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endif()
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endif()
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set(HAVE_CLOSESOCKET 0)
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set(HAVE_DECL_FSEEKO 1)
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set(HAVE_DIRENT_H 1)
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if(APPLE OR
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CYGWIN OR
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CMAKE_SYSTEM_NAME STREQUAL "OpenBSD")
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set(HAVE_EVENTFD 0)
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elseif(CMAKE_SYSTEM_NAME STREQUAL "Linux" OR
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CMAKE_SYSTEM_NAME STREQUAL "FreeBSD" OR
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CMAKE_SYSTEM_NAME STREQUAL "NetBSD")
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set(HAVE_EVENTFD 1)
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endif()
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if(ANDROID AND ANDROID_PLATFORM_LEVEL GREATER_EQUAL 34)
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set(HAVE_MEMSET_EXPLICIT 1)
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endif()
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if((APPLE AND CMAKE_OSX_DEPLOYMENT_TARGET VERSION_GREATER_EQUAL 10.9) OR
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CMAKE_SYSTEM_NAME STREQUAL "DragonFlyBSD" OR # v6+
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CMAKE_SYSTEM_NAME STREQUAL "FreeBSD") # v11.2+
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set(HAVE_MEMSET_S 1)
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elseif(NOT APPLE)
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set(HAVE_MEMSET_S 0)
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endif()
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set(HAVE_FCNTL 1)
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set(HAVE_FCNTL_H 1)
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set(HAVE_FCNTL_O_NONBLOCK 1)
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set(HAVE_FILE_OFFSET_BITS 1)
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set(HAVE_FNMATCH 1)
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set(HAVE_FREEADDRINFO 1)
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set(HAVE_FSEEKO 1)
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if(APPLE)
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set(HAVE_FSETXATTR 1)
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set(HAVE_FSETXATTR_5 0)
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set(HAVE_FSETXATTR_6 1)
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elseif(CMAKE_SYSTEM_NAME STREQUAL "FreeBSD" OR
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CMAKE_SYSTEM_NAME STREQUAL "OpenBSD")
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set(HAVE_FSETXATTR 0)
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set(HAVE_FSETXATTR_5 0)
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set(HAVE_FSETXATTR_6 0)
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elseif(CYGWIN OR
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CMAKE_SYSTEM_NAME STREQUAL "Linux" OR
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CMAKE_SYSTEM_NAME STREQUAL "NetBSD")
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set(HAVE_FSETXATTR 1)
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set(HAVE_FSETXATTR_5 1)
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set(HAVE_FSETXATTR_6 0)
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endif()
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set(HAVE_GETADDRINFO 1)
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if(CMAKE_SYSTEM_NAME STREQUAL "OpenBSD")
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set(HAVE_GETADDRINFO_THREADSAFE 0)
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elseif(CYGWIN OR
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CMAKE_SYSTEM_NAME STREQUAL "Linux" OR
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CMAKE_SYSTEM_NAME STREQUAL "FreeBSD" OR
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CMAKE_SYSTEM_NAME STREQUAL "NetBSD")
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set(HAVE_GETADDRINFO_THREADSAFE 1)
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endif()
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set(HAVE_GETEUID 1)
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if(APPLE OR
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CYGWIN OR
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CMAKE_SYSTEM_NAME STREQUAL "NetBSD" OR
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CMAKE_SYSTEM_NAME STREQUAL "OpenBSD")
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set(HAVE_GETHOSTBYNAME_R 0)
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elseif(CMAKE_SYSTEM_NAME STREQUAL "Linux" OR
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CMAKE_SYSTEM_NAME STREQUAL "FreeBSD")
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set(HAVE_GETHOSTBYNAME_R 1)
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endif()
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set(HAVE_GETHOSTBYNAME_R_3 0)
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set(HAVE_GETHOSTBYNAME_R_3_REENTRANT 0)
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set(HAVE_GETHOSTBYNAME_R_5 0)
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set(HAVE_GETHOSTBYNAME_R_5_REENTRANT 0)
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if(CMAKE_SYSTEM_NAME STREQUAL "Linux")
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set(HAVE_GETHOSTBYNAME_R_6 1)
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set(HAVE_GETHOSTBYNAME_R_6_REENTRANT 1)
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else()
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set(HAVE_GETHOSTBYNAME_R_6 0)
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set(HAVE_GETHOSTBYNAME_R_6_REENTRANT 0)
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endif()
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set(HAVE_GETHOSTNAME 1)
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if(NOT ANDROID OR ANDROID_PLATFORM_LEVEL GREATER_EQUAL 24)
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set(HAVE_GETIFADDRS 1)
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else()
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set(HAVE_GETIFADDRS 0)
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endif()
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if(APPLE OR
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CYGWIN OR
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CMAKE_SYSTEM_NAME STREQUAL "Linux" OR
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CMAKE_SYSTEM_NAME STREQUAL "FreeBSD" OR
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CMAKE_SYSTEM_NAME STREQUAL "OpenBSD")
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set(HAVE_GETPASS_R 0)
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elseif(CMAKE_SYSTEM_NAME STREQUAL "NetBSD")
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set(HAVE_GETPASS_R 1)
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endif()
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set(HAVE_GETPEERNAME 1)
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set(HAVE_GETPPID 1)
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set(HAVE_GETPWUID 1)
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set(HAVE_GETPWUID_R 1)
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set(HAVE_GETRLIMIT 1)
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set(HAVE_GETSOCKNAME 1)
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set(HAVE_GETTIMEOFDAY 1)
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if(CMAKE_SYSTEM_NAME STREQUAL "Linux")
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# Depends on C library.
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else()
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set(HAVE_GLIBC_STRERROR_R 0)
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endif()
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set(HAVE_GMTIME_R 1)
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set(HAVE_IFADDRS_H 1)
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set(HAVE_IF_NAMETOINDEX 1)
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set(HAVE_INET_NTOP 1)
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set(HAVE_INET_PTON 1)
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set(HAVE_IOCTLSOCKET 0)
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set(HAVE_IOCTLSOCKET_CAMEL 0)
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set(HAVE_IOCTLSOCKET_CAMEL_FIONBIO 0)
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set(HAVE_IOCTLSOCKET_FIONBIO 0)
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set(HAVE_IOCTL_FIONBIO 1)
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set(HAVE_IOCTL_SIOCGIFADDR 1)
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if(CYGWIN)
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set(HAVE_IO_H 1)
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else()
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set(HAVE_IO_H 0)
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endif()
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set(HAVE_LIBGEN_H 1)
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if(CMAKE_SYSTEM_NAME STREQUAL "Linux")
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# Requires Linux kernel userspace headers. Expected with glibc. May be missing by default with MUSL.
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else()
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set(HAVE_LINUX_TCP_H 0)
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endif()
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set(HAVE_LOCALE_H 1)
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set(HAVE_LOCALTIME_R 1)
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if(APPLE)
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set(HAVE_MACH_ABSOLUTE_TIME 1)
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endif()
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if(APPLE OR
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CYGWIN)
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set(HAVE_MEMRCHR 0)
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else()
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set(HAVE_MEMRCHR 1)
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endif()
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set(HAVE_NETDB_H 1)
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if(ANDROID)
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set(HAVE_NETINET_IN6_H 1)
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else()
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set(HAVE_NETINET_IN6_H 0)
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endif()
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set(HAVE_NETINET_IN_H 1)
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set(HAVE_NETINET_TCP_H 1)
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set(HAVE_NETINET_UDP_H 1)
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set(HAVE_NET_IF_H 1)
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set(HAVE_OPENDIR 1)
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set(HAVE_PIPE 1)
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if(APPLE OR
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CYGWIN)
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set(HAVE_PIPE2 0)
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elseif(CMAKE_SYSTEM_NAME STREQUAL "Linux" OR
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BSD OR
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CMAKE_SYSTEM_NAME STREQUAL "DragonFlyBSD" OR
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CMAKE_SYSTEM_NAME STREQUAL "FreeBSD" OR
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CMAKE_SYSTEM_NAME STREQUAL "NetBSD" OR
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CMAKE_SYSTEM_NAME STREQUAL "OpenBSD" OR
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CMAKE_SYSTEM_NAME STREQUAL "SunOS")
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set(HAVE_PIPE2 1)
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endif()
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set(HAVE_POLL 1)
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set(HAVE_POLL_H 1)
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if(CMAKE_SYSTEM_NAME STREQUAL "Linux")
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# Depends on C library.
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else()
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set(HAVE_POSIX_STRERROR_R 1)
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endif()
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set(HAVE_PWD_H 1)
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set(HAVE_REALPATH 1)
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set(HAVE_RECV 1)
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set(HAVE_SA_FAMILY_T 1)
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set(HAVE_SCHED_YIELD 1)
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set(HAVE_SELECT 1)
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set(HAVE_SEND 1)
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if(APPLE OR
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CYGWIN)
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set(HAVE_SENDMMSG 0)
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else()
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set(HAVE_SENDMMSG 1)
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endif()
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set(HAVE_SENDMSG 1)
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set(HAVE_SETLOCALE 1)
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set(HAVE_SETRLIMIT 1)
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set(HAVE_SETSOCKOPT_SO_NONBLOCK 0)
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set(HAVE_SIGACTION 1)
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set(HAVE_SIGINTERRUPT 1)
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set(HAVE_SIGNAL 1)
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set(HAVE_SIGSETJMP 1)
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set(HAVE_SOCKADDR_IN6_SIN6_ADDR 1)
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set(HAVE_SOCKADDR_IN6_SIN6_SCOPE_ID 1)
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set(HAVE_SOCKET 1)
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set(HAVE_SOCKETPAIR 1)
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set(HAVE_STDATOMIC_H 1)
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set(HAVE_STDBOOL_H 1)
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set(HAVE_STDDEF_H 1) # detected by CMake internally in check_type_size()
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set(HAVE_STDINT_H 1) # detected by CMake internally in check_type_size()
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set(HAVE_STRCASECMP 1)
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set(HAVE_STRCMPI 0)
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set(HAVE_STRERROR_R 1)
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set(HAVE_STRICMP 0)
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set(HAVE_STRINGS_H 1)
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if(_CURL_OLD_LINUX)
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set(HAVE_STROPTS_H 1)
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else()
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set(HAVE_STROPTS_H 0) # glibc 2.30 or newer. https://sourceware.org/legacy-ml/libc-alpha/2019-08/msg00029.html
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endif()
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set(HAVE_STRUCT_SOCKADDR_STORAGE 1)
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set(HAVE_STRUCT_TIMEVAL 1)
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if(ANDROID OR CMAKE_SYSTEM_NAME STREQUAL "iOS")
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set(HAVE_SUSECONDS_T 1)
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endif()
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if(APPLE OR
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CYGWIN OR
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CMAKE_SYSTEM_NAME STREQUAL "OpenBSD")
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set(HAVE_SYS_EVENTFD_H 0)
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elseif(CMAKE_SYSTEM_NAME STREQUAL "Linux" OR
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CMAKE_SYSTEM_NAME STREQUAL "FreeBSD" OR
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CMAKE_SYSTEM_NAME STREQUAL "NetBSD")
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set(HAVE_SYS_EVENTFD_H 1)
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endif()
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if(CYGWIN OR
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CMAKE_SYSTEM_NAME STREQUAL "Linux")
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set(HAVE_SYS_FILIO_H 0)
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else()
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set(HAVE_SYS_FILIO_H 1)
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endif()
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set(HAVE_SYS_IOCTL_H 1)
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set(HAVE_SYS_PARAM_H 1)
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set(HAVE_SYS_POLL_H 1)
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set(HAVE_SYS_RESOURCE_H 1)
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set(HAVE_SYS_SELECT_H 1)
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if(CYGWIN OR
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CMAKE_SYSTEM_NAME STREQUAL "Linux")
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set(HAVE_SYS_SOCKIO_H 0)
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else()
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set(HAVE_SYS_SOCKIO_H 1)
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endif()
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set(HAVE_SYS_TYPES_H 1)
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set(HAVE_SYS_UN_H 1)
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if(CYGWIN)
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set(HAVE_SYS_UTIME_H 1)
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else()
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set(HAVE_SYS_UTIME_H 0)
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endif()
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set(HAVE_TERMIOS_H 1)
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if(CYGWIN OR
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CMAKE_SYSTEM_NAME STREQUAL "Linux")
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set(HAVE_TERMIO_H 1)
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else()
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set(HAVE_TERMIO_H 0)
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endif()
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set(HAVE_TIME_T_UNSIGNED 0)
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set(HAVE_UNISTD_H 1)
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set(HAVE_UTIME 1)
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set(HAVE_UTIMES 1)
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set(HAVE_UTIME_H 1)
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set(HAVE_WRITABLE_ARGV 1)
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set(STDC_HEADERS 1)
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set(USE_UNIX_SOCKETS 1)
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