return (0);
}
-/*
- * Do not use Windows tmpfile function.
- * It will make a temporary file under the root directory
- * and it'll cause permission error if a user who is
- * non-Administrator creates temporary files.
- */
-int
-__la_mkstemp(char *template)
-{
- static const char num[] = {
- '0', '1', '2', '3', '4', '5', '6', '7',
- '8', '9', 'A', 'B', 'C', 'D', 'E', 'F',
- 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N',
- 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V',
- 'W', 'X', 'Y', 'Z', 'a', 'b', 'c', 'd',
- 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l',
- 'm', 'n', 'o', 'p', 'q', 'r', 's', 't',
- 'u', 'v', 'w', 'x', 'y', 'z'
- };
- HCRYPTPROV hProv;
- wchar_t *ws;
- int fd;
- size_t l, tmpsize;
- errno_t err;
- int i, xcnt;
-
- fd = -1;
- hProv = (HCRYPTPROV)NULL;
- tmpsize = l = strlen(template);
- xcnt = 0;
- while (l > 0 && template[--l] == 'X')
- xcnt++;
- if (xcnt < 6) {
- errno = EINVAL;
- goto exit_tmpfile;
- }
-
- if (!CryptAcquireContext(&hProv, NULL, NULL, PROV_RSA_FULL,
- CRYPT_VERIFYCONTEXT)) {
- la_dosmaperr(GetLastError());
- goto exit_tmpfile;
- }
-
- ws = NULL;
- do {
- BYTE *p;
-
- /* Make a random file name. */
- p = (BYTE *)template + tmpsize - xcnt;
- if (!CryptGenRandom(hProv, xcnt, p)) {
- la_dosmaperr(GetLastError());
- goto exit_tmpfile;
- }
- for (i = 0; i < xcnt; i++, p++)
- *p = num[*p % sizeof(num)];
-
- free(ws);
- ws = permissive_name(template);
- if (ws == NULL) {
- errno = EINVAL;
- goto exit_tmpfile;
- }
- err = _wsopen_s(&fd, ws,
- _O_CREAT | _O_EXCL | _O_BINARY | _O_RDWR | _O_TEMPORARY,
- _SH_DENYRW,
- _S_IREAD | _S_IWRITE);
- } while (err == EEXIST);
-
- if (err != 0)
- fd = -1;
-exit_tmpfile:
- free(ws);
- if (hProv != (HCRYPTPROV)NULL)
- CryptReleaseContext(hProv, 0);
- return (fd);
-}
-
/* Windows' mbstowcs is differrent error handling from other unix mbstowcs.
* That one is using MultiByteToWideChar function with MB_PRECOMPOSED and
* MB_ERR_INVALID_CHARS flags.
#endif /* !HAVE_OPENSSL_MD5_H && !HAVE_OPENSSL_SHA_H */
+/*
+ * Create a temporary file.
+ *
+ * Do not use Windows tmpfile() function.
+ * It will make a temporary file under the root directory
+ * and it'll cause permission error if a user who is
+ * non-Administrator creates temporary files.
+ * Also Windows version of mktemp family including _mktemp_s
+ * are not secure.
+ */
+int
+__archive_mktemp(const char *tmpdir)
+{
+ static const char num[] = {
+ '0', '1', '2', '3', '4', '5', '6', '7',
+ '8', '9', 'A', 'B', 'C', 'D', 'E', 'F',
+ 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N',
+ 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V',
+ 'W', 'X', 'Y', 'Z', 'a', 'b', 'c', 'd',
+ 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l',
+ 'm', 'n', 'o', 'p', 'q', 'r', 's', 't',
+ 'u', 'v', 'w', 'x', 'y', 'z'
+ };
+ HCRYPTPROV hProv;
+ struct archive_string temp_name;
+ wchar_t *ws;
+ DWORD attr;
+ BYTE *xp, *ep;
+ int err;
+ int fd;
+
+ hProv = (HCRYPTPROV)NULL;
+ fd = -1;
+ ws = NULL;
+ archive_string_init(&temp_name);
+
+ /* Get a temporary directory. */
+ if (tmpdir == NULL) {
+ size_t l;
+ char *tmp;
+
+ l = GetTempPathA(0, NULL);
+ if (l == 0) {
+ la_dosmaperr(GetLastError());
+ goto exit_tmpfile;
+ }
+ tmp = malloc(l);
+ if (tmp == NULL) {
+ errno = ENOMEM;
+ goto exit_tmpfile;
+ }
+ GetTempPathA(l, tmp);
+ archive_strcpy(&temp_name, tmp);
+ free(tmp);
+ } else {
+ archive_strcpy(&temp_name, tmpdir);
+ if (temp_name.s[temp_name.length-1] != '/')
+ archive_strappend_char(&temp_name, '/');
+ }
+
+ /* Check if temp_name is a directory. */
+ attr = GetFileAttributesA(temp_name.s);
+ if (attr == (DWORD)-1) {
+ if (GetLastError() != ERROR_FILE_NOT_FOUND) {
+ la_dosmaperr(GetLastError());
+ goto exit_tmpfile;
+ }
+ ws = permissive_name(temp_name.s);
+ if (ws == NULL) {
+ errno = EINVAL;
+ goto exit_tmpfile;
+ }
+ attr = GetFileAttributesW(ws);
+ if (attr == (DWORD)-1) {
+ la_dosmaperr(GetLastError());
+ goto exit_tmpfile;
+ }
+ }
+ if (!(attr & FILE_ATTRIBUTE_DIRECTORY)) {
+ errno = ENOTDIR;
+ goto exit_tmpfile;
+ }
+
+ /*
+ * Create a temporary file.
+ */
+ archive_strcat(&temp_name, "libarchive_");
+ xp = temp_name.s + archive_strlen(&temp_name);
+ archive_strcat(&temp_name, "XXXXXXXXXX");
+ ep = temp_name.s + archive_strlen(&temp_name);
+
+ if (!CryptAcquireContext(&hProv, NULL, NULL, PROV_RSA_FULL,
+ CRYPT_VERIFYCONTEXT)) {
+ la_dosmaperr(GetLastError());
+ goto exit_tmpfile;
+ }
+
+ do {
+ BYTE *p;
+
+ /* Get a random file name through CryptGenRandom(). */
+ p = xp;
+ if (!CryptGenRandom(hProv, ep - p, p)) {
+ la_dosmaperr(GetLastError());
+ goto exit_tmpfile;
+ }
+ for (; p < ep; p++)
+ *p = num[*p % sizeof(num)];
+
+ free(ws);
+ ws = permissive_name(temp_name.s);
+ if (ws == NULL) {
+ errno = EINVAL;
+ goto exit_tmpfile;
+ }
+ /* Specifing _O_TEMPORARY flag automatically remove
+ * a temporary file when the file closed. */
+ err = _wsopen_s(&fd, ws,
+ _O_CREAT | _O_EXCL | _O_BINARY | _O_RDWR | _O_TEMPORARY,
+ _SH_DENYRW,
+ _S_IREAD | _S_IWRITE);
+ } while (err == EEXIST);
+
+ if (err != 0)
+ fd = -1;
+exit_tmpfile:
+ if (hProv != (HCRYPTPROV)NULL)
+ CryptReleaseContext(hProv, 0);
+ free(ws);
+ archive_string_free(&temp_name);
+ return (fd);
+}
+
#endif /* _WIN32 && !__CYGWIN__ */
projects / thirdparty / libarchive.git / commitdiff
