security-and-privacy/gnupg
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Updated estream.

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More changes for Windows.
This commit is contained in:
Werner Koch 2007-08-22 10:55:07 +00:00
parent a5743d1017
commit f81f521a72
23 changed files with 508 additions and 281 deletions
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90
common/sysutils.c
View file

@ -1,5 +1,6 @@
/* sysutils.c - system helpers
* Copyright (C) 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
* Copyright (C) 1998, 1999, 2000, 2001, 2003, 2004,
* 2007 Free Software Foundation, Inc.
*
* This file is part of GnuPG.
*
@ -53,6 +54,9 @@
#include "sysutils.h"
#define tohex(n) ((n) < 10 ? ((n) + '0') : (((n) - 10) + 'A'))
#if defined(__linux__) && defined(__alpha__) && __GLIBC__ < 2
#warning using trap_unaligned
static int
@ -298,7 +302,7 @@ translate_sys2libc_fd (gnupg_fd_t fd, int for_write)
}
/* This is the same as translate_sys2libc_fd but takes an integer
which is assumet to be such an system handle. */
which is assumed to be such an system handle. */
int
translate_sys2libc_fd_int (int fd, int for_write)
{
@ -311,3 +315,85 @@ translate_sys2libc_fd_int (int fd, int for_write)
return fd;
#endif
}
/* Replacement for tmpfile(). This is required because the tmpfile
function of Windows' runtime library is broken, insecure, ignores
TMPDIR and so on. In addition we create a file with an inheritable
handle. */
FILE *
gnupg_tmpfile (void)
{
#ifdef HAVE_W32_SYSTEM
int attempts, n;
char buffer[MAX_PATH+7+12+1];
char *name, *p;
HANDLE file;
int pid = GetCurrentProcessId ();
unsigned int value;
int i;
SECURITY_ATTRIBUTES sec_attr;
memset (&sec_attr, 0, sizeof sec_attr );
sec_attr.nLength = sizeof sec_attr;
sec_attr.bInheritHandle = TRUE;
n = GetTempPath (MAX_PATH+1, buffer);
if (!n || n > MAX_PATH || strlen (buffer) > MAX_PATH)
{
errno = ENOENT;
return NULL;
}
p = buffer + strlen (buffer);
p = stpcpy (p, "_gnupg");
/* We try to create the directory but don't care about an error as
it may already exist and the CreateFile would throw an error
anyway. */
CreateDirectory (buffer, NULL);
*p++ = '\\';
name = p;
for (attempts=0; attempts < 10; attempts++)
{
p = name;
value = (GetTickCount () ^ ((pid<<16) & 0xffff0000));
for (i=0; i < 8; i++)
{
*p++ = tohex (((value >> 28) & 0x0f));
value <<= 4;
}
strcpy (p, ".tmp");
file = CreateFile (buffer,
GENERIC_READ | GENERIC_WRITE,
0,
&sec_attr,
CREATE_NEW,
FILE_ATTRIBUTE_TEMPORARY | FILE_FLAG_DELETE_ON_CLOSE,
NULL);
if (file != INVALID_HANDLE_VALUE)
{
FILE *fp;
int fd = _open_osfhandle ((long)file, 0);
if (fd == -1)
{
CloseHandle (file);
return NULL;
}
fp = fdopen (fd, "w+b");
if (!fp)
{
int save = errno;
close (fd);
errno = save;
return NULL;
}
return fp;
}
Sleep (1); /* One ms as this is the granularity of GetTickCount. */
}
errno = ENOENT;
return NULL;
#else /*!HAVE_W32_SYSTEM*/
return tmpfile ();
#endif /*!HAVE_W32_SYSTEM*/
}