From: Arne Schwabe <a...@rfc2549.org> Currently we only warn in get_tmp_dir fails and set o->tmp_dir to a null pointer. This will not be caught by check_file_access_chroot either since that ignores NULL pointers but other parts of OpenVPN will assume that tmp_dir is set to a non-NULL string.
Also move get_tmp_dir to ssl-utils.c to use it in unit tests. Change-Id: I525ccf7872880367b248ebebb0ddc83551498042 Signed-off-by: Arne Schwabe <a...@rfc2549.org> Acked-by: Frank Lichtenheld <fr...@lichtenheld.com> --- This change was reviewed on Gerrit and approved by at least one developer. I request to merge it to master. Gerrit URL: https://gerrit.openvpn.net/c/openvpn/+/481 This mail reflects revision 2 of this Change. Acked-by according to Gerrit (reflected above): Frank Lichtenheld <fr...@lichtenheld.com> diff --git a/src/openvpn/options.c b/src/openvpn/options.c index e498114..79958db 100644 --- a/src/openvpn/options.c +++ b/src/openvpn/options.c @@ -885,7 +885,15 @@ #ifdef _WIN32 /* On Windows, find temp dir via environment variables */ o->tmp_dir = win_get_tempdir(); -#else + + if (!o->tmp_dir) + { + /* Error out if we can't find a valid temporary directory, which should + * be very unlikely. */ + msg(M_USAGE, "Could not find a suitable temporary directory." + " (GetTempPath() failed). Consider using --tmp-dir"); + } +#else /* ifdef _WIN32 */ /* Non-windows platforms use $TMPDIR, and if not set, default to '/tmp' */ o->tmp_dir = getenv("TMPDIR"); if (!o->tmp_dir) diff --git a/src/openvpn/win32-util.c b/src/openvpn/win32-util.c index 81e504a..c5e7505 100644 --- a/src/openvpn/win32-util.c +++ b/src/openvpn/win32-util.c @@ -147,4 +147,26 @@ } return true; } + +const char * +win_get_tempdir(void) +{ + static char tmpdir[MAX_PATH]; + WCHAR wtmpdir[MAX_PATH]; + + if (!GetTempPathW(_countof(wtmpdir), wtmpdir)) + { + return NULL; + } + + if (WideCharToMultiByte(CP_UTF8, 0, wtmpdir, -1, NULL, 0, NULL, NULL) > sizeof(tmpdir)) + { + msg(M_WARN, "Could not get temporary directory. Path is too long." + " Consider using --tmp-dir"); + return NULL; + } + + WideCharToMultiByte(CP_UTF8, 0, wtmpdir, -1, tmpdir, sizeof(tmpdir), NULL, NULL); + return tmpdir; +} #endif /* _WIN32 */ diff --git a/src/openvpn/win32-util.h b/src/openvpn/win32-util.h index ac37979..98bf74b 100644 --- a/src/openvpn/win32-util.h +++ b/src/openvpn/win32-util.h @@ -40,5 +40,8 @@ /* return true if filename is safe to be used on Windows */ bool win_safe_filename(const char *fn); +/* Find temporary directory */ +const char *win_get_tempdir(void); + #endif /* OPENVPN_WIN32_UTIL_H */ #endif /* ifdef _WIN32 */ diff --git a/src/openvpn/win32.c b/src/openvpn/win32.c index e998d90..6b7ba5e 100644 --- a/src/openvpn/win32.c +++ b/src/openvpn/win32.c @@ -1137,34 +1137,6 @@ set_win_sys_path(buf, es); } - -const char * -win_get_tempdir(void) -{ - static char tmpdir[MAX_PATH]; - WCHAR wtmpdir[MAX_PATH]; - - if (!GetTempPathW(_countof(wtmpdir), wtmpdir)) - { - /* Warn if we can't find a valid temporary directory, which should - * be unlikely. - */ - msg(M_WARN, "Could not find a suitable temporary directory." - " (GetTempPath() failed). Consider using --tmp-dir"); - return NULL; - } - - if (WideCharToMultiByte(CP_UTF8, 0, wtmpdir, -1, NULL, 0, NULL, NULL) > sizeof(tmpdir)) - { - msg(M_WARN, "Could not get temporary directory. Path is too long." - " Consider using --tmp-dir"); - return NULL; - } - - WideCharToMultiByte(CP_UTF8, 0, wtmpdir, -1, tmpdir, sizeof(tmpdir), NULL, NULL); - return tmpdir; -} - static bool win_block_dns_service(bool add, int index, const HANDLE pipe) { diff --git a/src/openvpn/win32.h b/src/openvpn/win32.h index 3605966..aa8513b 100644 --- a/src/openvpn/win32.h +++ b/src/openvpn/win32.h @@ -286,9 +286,6 @@ /* call self in a subprocess */ void fork_to_self(const char *cmdline); -/* Find temporary directory */ -const char *win_get_tempdir(void); - bool win_wfp_block_dns(const NET_IFINDEX index, const HANDLE msg_channel); bool win_wfp_uninit(const NET_IFINDEX index, const HANDLE msg_channel); _______________________________________________ Openvpn-devel mailing list Openvpn-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/openvpn-devel
