/*************************************************************************** * _ _ ____ _ * Project ___| | | | _ \| | * / __| | | | |_) | | * | (__| |_| | _ <| |___ * \___|\___/|_| \_\_____| * * Copyright (C) 1998 - 2016, Daniel Stenberg, , et al. * * This software is licensed as described in the file COPYING, which * you should have received as part of this distribution. The terms * are also available at https://curl.haxx.se/docs/copyright.html. * * You may opt to use, copy, modify, merge, publish, distribute and/or sell * copies of the Software, and permit persons to whom the Software is * furnished to do so, under the terms of the COPYING file. * * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY * KIND, either express or implied. * ***************************************************************************/ #include "tool_setup.h" #if defined(MSDOS) || defined(WIN32) #if defined(HAVE_LIBGEN_H) && defined(HAVE_BASENAME) # include #endif #ifdef WIN32 # include "tool_cfgable.h" # include "tool_libinfo.h" #endif #include "tool_bname.h" #include "tool_doswin.h" #include "memdebug.h" /* keep this as LAST include */ /* * Macros ALWAYS_TRUE and ALWAYS_FALSE are used to avoid compiler warnings. */ #define ALWAYS_TRUE (1) #define ALWAYS_FALSE (0) #if defined(_MSC_VER) && !defined(__POCC__) # undef ALWAYS_TRUE # undef ALWAYS_FALSE # if (_MSC_VER < 1500) # define ALWAYS_TRUE (0, 1) # define ALWAYS_FALSE (1, 0) # else # define ALWAYS_TRUE \ __pragma(warning(push)) \ __pragma(warning(disable:4127)) \ (1) \ __pragma(warning(pop)) # define ALWAYS_FALSE \ __pragma(warning(push)) \ __pragma(warning(disable:4127)) \ (0) \ __pragma(warning(pop)) # endif #endif #ifdef WIN32 # undef PATH_MAX # define PATH_MAX MAX_PATH #endif #ifndef S_ISCHR # ifdef S_IFCHR # define S_ISCHR(m) (((m) & S_IFMT) == S_IFCHR) # else # define S_ISCHR(m) (0) /* cannot tell if file is a device */ # endif #endif #ifdef WIN32 # define _use_lfn(f) ALWAYS_TRUE /* long file names always available */ #elif !defined(__DJGPP__) || (__DJGPP__ < 2) /* DJGPP 2.0 has _use_lfn() */ # define _use_lfn(f) ALWAYS_FALSE /* long file names never available */ #elif defined(__DJGPP__) # include /* _use_lfn(f) prototype */ #endif #ifndef UNITTESTS static SANITIZEcode truncate_dryrun(const char *path, const size_t truncate_pos); #ifdef MSDOS static SANITIZEcode msdosify(char **const sanitized, const char *file_name, int flags); #endif static SANITIZEcode rename_if_reserved_dos_device_name(char **const sanitized, const char *file_name, int flags); #endif /* !UNITTESTS (static declarations used if no unit tests) */ /* Sanitize a file or path name. All banned characters are replaced by underscores, for example: f?*foo => f__foo f:foo::$DATA => f_foo__$DATA f:\foo:bar => f__foo_bar f:\foo:bar => f:\foo:bar (flag SANITIZE_ALLOW_PATH) This function was implemented according to the guidelines in 'Naming Files, Paths, and Namespaces' section 'Naming Conventions'. https://msdn.microsoft.com/en-us/library/windows/desktop/aa365247.aspx Flags ----- SANITIZE_ALLOW_COLONS: Allow colons. Without this flag colons are sanitized. SANITIZE_ALLOW_PATH: Allow path separators and colons. Without this flag path separators and colons are sanitized. SANITIZE_ALLOW_RESERVED: Allow reserved device names. Without this flag a reserved device name is renamed (COM1 => _COM1) unless it's in a UNC prefixed path. SANITIZE_ALLOW_TRUNCATE: Allow truncating a long filename. Without this flag if the sanitized filename or path will be too long an error occurs. With this flag the filename --and not any other parts of the path-- may be truncated to at least a single character. A filename followed by an alternate data stream (ADS) cannot be truncated in any case. Success: (SANITIZE_ERR_OK) *sanitized points to a sanitized copy of file_name. Failure: (!= SANITIZE_ERR_OK) *sanitized is NULL. */ SANITIZEcode sanitize_file_name(char **const sanitized, const char *file_name, int flags) { char *p, *target; size_t len; SANITIZEcode sc; size_t max_sanitized_len; if(!sanitized) return SANITIZE_ERR_BAD_ARGUMENT; *sanitized = NULL; if(!file_name) return SANITIZE_ERR_BAD_ARGUMENT; if((flags & SANITIZE_ALLOW_PATH)) { #ifndef MSDOS if(file_name[0] == '\\' && file_name[1] == '\\') /* UNC prefixed path \\ (eg \\?\C:\foo) */ max_sanitized_len = 32767-1; else #endif max_sanitized_len = PATH_MAX-1; } else /* The maximum length of a filename. FILENAME_MAX is often the same as PATH_MAX, in other words it is 260 and does not discount the path information therefore we shouldn't use it. */ max_sanitized_len = (PATH_MAX-1 > 255) ? 255 : PATH_MAX-1; len = strlen(file_name); if(len > max_sanitized_len) { if(!(flags & SANITIZE_ALLOW_TRUNCATE) || truncate_dryrun(file_name, max_sanitized_len)) return SANITIZE_ERR_INVALID_PATH; len = max_sanitized_len; } target = malloc(len + 1); if(!target) return SANITIZE_ERR_OUT_OF_MEMORY; strncpy(target, file_name, len); target[len] = '\0'; #ifndef MSDOS if((flags & SANITIZE_ALLOW_PATH) && !strncmp(target, "\\\\?\\", 4)) /* Skip the literal path prefix \\?\ */ p = target + 4; else #endif p = target; /* replace control characters and other banned characters */ for(; *p; ++p) { const char *banned; if((1 <= *p && *p <= 31) || (!(flags & (SANITIZE_ALLOW_COLONS|SANITIZE_ALLOW_PATH)) && *p == ':') || (!(flags & SANITIZE_ALLOW_PATH) && (*p == '/' || *p == '\\'))) { *p = '_'; continue; } for(banned = "|<>\"?*"; *banned; ++banned) { if(*p == *banned) { *p = '_'; break; } } } /* remove trailing spaces and periods if not allowing paths */ if(!(flags & SANITIZE_ALLOW_PATH) && len) { char *clip = NULL; p = &target[len]; do { --p; if(*p != ' ' && *p != '.') break; clip = p; } while(p != target); if(clip) { *clip = '\0'; len = clip - target; } } #ifdef MSDOS sc = msdosify(&p, target, flags); free(target); if(sc) return sc; target = p; len = strlen(target); if(len > max_sanitized_len) { free(target); return SANITIZE_ERR_INVALID_PATH; } #endif if(!(flags & SANITIZE_ALLOW_RESERVED)) { sc = rename_if_reserved_dos_device_name(&p, target, flags); free(target); if(sc) return sc; target = p; len = strlen(target); if(len > max_sanitized_len) { free(target); return SANITIZE_ERR_INVALID_PATH; } } *sanitized = target; return SANITIZE_ERR_OK; } /* Test if truncating a path to a file will leave at least a single character in the filename. Filenames suffixed by an alternate data stream can't be truncated. This performs a dry run, nothing is modified. Good truncate_pos 9: C:\foo\bar => C:\foo\ba Good truncate_pos 6: C:\foo => C:\foo Good truncate_pos 5: C:\foo => C:\fo Bad* truncate_pos 5: C:foo => C:foo Bad truncate_pos 5: C:\foo:ads => C:\fo Bad truncate_pos 9: C:\foo:ads => C:\foo:ad Bad truncate_pos 5: C:\foo\bar => C:\fo Bad truncate_pos 5: C:\foo\ => C:\fo Bad truncate_pos 7: C:\foo\ => C:\foo\ Error truncate_pos 7: C:\foo => (pos out of range) Bad truncate_pos 1: C:\foo\ => C * C:foo is ambiguous, C could end up being a drive or file therefore something like C:superlongfilename can't be truncated. Returns SANITIZE_ERR_OK: Good -- 'path' can be truncated SANITIZE_ERR_INVALID_PATH: Bad -- 'path' cannot be truncated != SANITIZE_ERR_OK && != SANITIZE_ERR_INVALID_PATH: Error */ SANITIZEcode truncate_dryrun(const char *path, const size_t truncate_pos) { size_t len; if(!path) return SANITIZE_ERR_BAD_ARGUMENT; len = strlen(path); if(truncate_pos > len) return SANITIZE_ERR_BAD_ARGUMENT; if(!len || !truncate_pos) return SANITIZE_ERR_INVALID_PATH; if(strpbrk(&path[truncate_pos - 1], "\\/:")) return SANITIZE_ERR_INVALID_PATH; /* C:\foo can be truncated but C:\foo:ads can't */ if(truncate_pos > 1) { const char *p = &path[truncate_pos - 1]; do { --p; if(*p == ':') return SANITIZE_ERR_INVALID_PATH; } while(p != path && *p != '\\' && *p != '/'); } return SANITIZE_ERR_OK; } /* The functions msdosify, rename_if_dos_device_name and __crt0_glob_function * were taken with modification from the DJGPP port of tar 1.12. They use * algorithms originally from DJTAR. */ /* Extra sanitization MSDOS for file_name. This is a supporting function for sanitize_file_name. Warning: This is an MSDOS legacy function and was purposely written in a way that some path information may pass through. For example drive letter names (C:, D:, etc) are allowed to pass through. For sanitizing a filename use sanitize_file_name. Success: (SANITIZE_ERR_OK) *sanitized points to a sanitized copy of file_name. Failure: (!= SANITIZE_ERR_OK) *sanitized is NULL. */ #if defined(MSDOS) || defined(UNITTESTS) SANITIZEcode msdosify(char **const sanitized, const char *file_name, int flags) { char dos_name[PATH_MAX]; static const char illegal_chars_dos[] = ".+, ;=[]" /* illegal in DOS */ "|<>/\\\":?*"; /* illegal in DOS & W95 */ static const char *illegal_chars_w95 = &illegal_chars_dos[8]; int idx, dot_idx; const char *s = file_name; char *d = dos_name; const char *const dlimit = dos_name + sizeof(dos_name) - 1; const char *illegal_aliens = illegal_chars_dos; size_t len = sizeof(illegal_chars_dos) - 1; if(!sanitized) return SANITIZE_ERR_BAD_ARGUMENT; *sanitized = NULL; if(!file_name) return SANITIZE_ERR_BAD_ARGUMENT; if(strlen(file_name) > PATH_MAX-1 && (!(flags & SANITIZE_ALLOW_TRUNCATE) || truncate_dryrun(file_name, PATH_MAX-1))) return SANITIZE_ERR_INVALID_PATH; /* Support for Windows 9X VFAT systems, when available. */ if(_use_lfn(file_name)) { illegal_aliens = illegal_chars_w95; len -= (illegal_chars_w95 - illegal_chars_dos); } /* Get past the drive letter, if any. */ if(s[0] >= 'A' && s[0] <= 'z' && s[1] == ':') { *d++ = *s++; *d = ((flags & (SANITIZE_ALLOW_COLONS|SANITIZE_ALLOW_PATH))) ? ':' : '_'; ++d, ++s; } for(idx = 0, dot_idx = -1; *s && d < dlimit; s++, d++) { if(memchr(illegal_aliens, *s, len)) { if((flags & (SANITIZE_ALLOW_COLONS|SANITIZE_ALLOW_PATH)) && *s == ':') *d = ':'; else if((flags & SANITIZE_ALLOW_PATH) && (*s == '/' || *s == '\\')) *d = *s; /* Dots are special: DOS doesn't allow them as the leading character, and a file name cannot have more than a single dot. We leave the first non-leading dot alone, unless it comes too close to the beginning of the name: we want sh.lex.c to become sh_lex.c, not sh.lex-c. */ else if(*s == '.') { if((flags & SANITIZE_ALLOW_PATH) && idx == 0 && (s[1] == '/' || s[1] == '\\' || (s[1] == '.' && (s[2] == '/' || s[2] == '\\')))) { /* Copy "./" and "../" verbatim. */ *d++ = *s++; if(d == dlimit) break; if(*s == '.') { *d++ = *s++; if(d == dlimit) break; } *d = *s; } else if(idx == 0) *d = '_'; else if(dot_idx >= 0) { if(dot_idx < 5) { /* 5 is a heuristic ad-hoc'ery */ d[dot_idx - idx] = '_'; /* replace previous dot */ *d = '.'; } else *d = '-'; } else *d = '.'; if(*s == '.') dot_idx = idx; } else if(*s == '+' && s[1] == '+') { if(idx - 2 == dot_idx) { /* .c++, .h++ etc. */ *d++ = 'x'; if(d == dlimit) break; *d = 'x'; } else { /* libg++ etc. */ if(dlimit - d < 4) { *d++ = 'x'; if(d == dlimit) break; *d = 'x'; } else { memcpy(d, "plus", 4); d += 3; } } s++; idx++; } else *d = '_'; } else *d = *s; if(*s == '/' || *s == '\\') { idx = 0; dot_idx = -1; } else idx++; } *d = '\0'; if(*s) { /* dos_name is truncated, check that truncation requirements are met, specifically truncating a filename suffixed by an alternate data stream or truncating the entire filename is not allowed. */ if(!(flags & SANITIZE_ALLOW_TRUNCATE) || strpbrk(s, "\\/:") || truncate_dryrun(dos_name, d - dos_name)) return SANITIZE_ERR_INVALID_PATH; } *sanitized = strdup(dos_name); return (*sanitized ? SANITIZE_ERR_OK : SANITIZE_ERR_OUT_OF_MEMORY); } #endif /* MSDOS || UNITTESTS */ /* Rename file_name if it's a reserved dos device name. This is a supporting function for sanitize_file_name. Warning: This is an MSDOS legacy function and was purposely written in a way that some path information may pass through. For example drive letter names (C:, D:, etc) are allowed to pass through. For sanitizing a filename use sanitize_file_name. Success: (SANITIZE_ERR_OK) *sanitized points to a sanitized copy of file_name. Failure: (!= SANITIZE_ERR_OK) *sanitized is NULL. */ SANITIZEcode rename_if_reserved_dos_device_name(char **const sanitized, const char *file_name, int flags) { /* We could have a file whose name is a device on MS-DOS. Trying to * retrieve such a file would fail at best and wedge us at worst. We need * to rename such files. */ char *p, *base; char fname[PATH_MAX]; #ifdef MSDOS struct_stat st_buf; #endif if(!sanitized) return SANITIZE_ERR_BAD_ARGUMENT; *sanitized = NULL; if(!file_name) return SANITIZE_ERR_BAD_ARGUMENT; /* Ignore UNC prefixed paths, they are allowed to contain a reserved name. */ #ifndef MSDOS if((flags & SANITIZE_ALLOW_PATH) && file_name[0] == '\\' && file_name[1] == '\\') { size_t len = strlen(file_name); *sanitized = malloc(len + 1); if(!*sanitized) return SANITIZE_ERR_OUT_OF_MEMORY; strncpy(*sanitized, file_name, len + 1); return SANITIZE_ERR_OK; } #endif if(strlen(file_name) > PATH_MAX-1 && (!(flags & SANITIZE_ALLOW_TRUNCATE) || truncate_dryrun(file_name, PATH_MAX-1))) return SANITIZE_ERR_INVALID_PATH; strncpy(fname, file_name, PATH_MAX-1); fname[PATH_MAX-1] = '\0'; base = basename(fname); /* Rename reserved device names that are known to be accessible without \\.\ Examples: CON => _CON, CON.EXT => CON_EXT, CON:ADS => CON_ADS https://support.microsoft.com/en-us/kb/74496 https://msdn.microsoft.com/en-us/library/windows/desktop/aa365247.aspx */ for(p = fname; p; p = (p == fname && fname != base ? base : NULL)) { size_t p_len; int x = (curl_strnequal(p, "CON", 3) || curl_strnequal(p, "PRN", 3) || curl_strnequal(p, "AUX", 3) || curl_strnequal(p, "NUL", 3)) ? 3 : (curl_strnequal(p, "CLOCK$", 6)) ? 6 : (curl_strnequal(p, "COM", 3) || curl_strnequal(p, "LPT", 3)) ? (('1' <= p[3] && p[3] <= '9') ? 4 : 3) : 0; if(!x) continue; /* the devices may be accessible with an extension or ADS, for example CON.AIR and 'CON . AIR' and CON:AIR access console */ for(; p[x] == ' '; ++x) ; if(p[x] == '.') { p[x] = '_'; continue; } else if(p[x] == ':') { if(!(flags & (SANITIZE_ALLOW_COLONS|SANITIZE_ALLOW_PATH))) { p[x] = '_'; continue; } ++x; } else if(p[x]) /* no match */ continue; /* p points to 'CON' or 'CON ' or 'CON:', etc */ p_len = strlen(p); /* Prepend a '_' */ if(strlen(fname) == PATH_MAX-1) { --p_len; if(!(flags & SANITIZE_ALLOW_TRUNCATE) || truncate_dryrun(p, p_len)) return SANITIZE_ERR_INVALID_PATH; p[p_len] = '\0'; } memmove(p + 1, p, p_len + 1); p[0] = '_'; ++p_len; /* if fname was just modified then the basename pointer must be updated */ if(p == fname) base = basename(fname); } /* This is the legacy portion from rename_if_dos_device_name that checks for reserved device names. It only works on MSDOS. On Windows XP the stat check errors with EINVAL if the device name is reserved. On Windows Vista/7/8 it sets mode S_IFREG (regular file or device). According to MSDN stat doc the latter behavior is correct, but that doesn't help us identify whether it's a reserved device name and not a regular file name. */ #ifdef MSDOS if(base && ((stat(base, &st_buf)) == 0) && (S_ISCHR(st_buf.st_mode))) { /* Prepend a '_' */ size_t blen = strlen(base); if(blen) { if(strlen(fname) == PATH_MAX-1) { --blen; if(!(flags & SANITIZE_ALLOW_TRUNCATE) || truncate_dryrun(base, blen)) return SANITIZE_ERR_INVALID_PATH; base[blen] = '\0'; } memmove(base + 1, base, blen + 1); base[0] = '_'; ++blen; } } #endif *sanitized = strdup(fname); return (*sanitized ? SANITIZE_ERR_OK : SANITIZE_ERR_OUT_OF_MEMORY); } #if defined(MSDOS) && (defined(__DJGPP__) || defined(__GO32__)) /* * Disable program default argument globbing. We do it on our own. */ char **__crt0_glob_function(char *arg) { (void)arg; return (char **)0; } #endif /* MSDOS && (__DJGPP__ || __GO32__) */ #ifdef WIN32 /* * Function to find CACert bundle on a Win32 platform using SearchPath. * (SearchPath is already declared via inclusions done in setup header file) * (Use the ASCII version instead of the unicode one!) * The order of the directories it searches is: * 1. application's directory * 2. current working directory * 3. Windows System directory (e.g. C:\windows\system32) * 4. Windows Directory (e.g. C:\windows) * 5. all directories along %PATH% * * For WinXP and later search order actually depends on registry value: * HKLM\SYSTEM\CurrentControlSet\Control\Session Manager\SafeProcessSearchMode */ CURLcode FindWin32CACert(struct OperationConfig *config, const char *bundle_file) { CURLcode result = CURLE_OK; /* search and set cert file only if libcurl supports SSL */ if(curlinfo->features & CURL_VERSION_SSL) { DWORD res_len; char buf[PATH_MAX]; char *ptr = NULL; buf[0] = '\0'; res_len = SearchPathA(NULL, bundle_file, NULL, PATH_MAX, buf, &ptr); if(res_len > 0) { Curl_safefree(config->cacert); config->cacert = strdup(buf); if(!config->cacert) result = CURLE_OUT_OF_MEMORY; } } return result; } #endif /* WIN32 */ #endif /* MSDOS || WIN32 */