1 files changed, 182 insertions, 0 deletions

diff --git a/crypto/openssh/openbsd-compat/bsd-cygwin_util.c b/crypto/openssh/openbsd-compat/bsd-cygwin_util.c
new file mode 100644
index 000000000000..2396a6e6b9dd
--- /dev/null
+++ b/crypto/openssh/openbsd-compat/bsd-cygwin_util.c
@@ -0,0 +1,182 @@
+/*
+ * cygwin_util.c
+ *
+ * Copyright (c) 2000, 2001, Corinna Vinschen <vinschen@cygnus.com>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * Created: Sat Sep 02 12:17:00 2000 cv
+ *
+ * This file contains functions for forcing opened file descriptors to
+ * binary mode on Windows systems.
+ */
+
+#include "includes.h"
+
+RCSID("$Id: bsd-cygwin_util.c,v 1.8 2002/04/15 22:00:52 stevesk Exp $");
+
+#ifdef HAVE_CYGWIN
+
+#include <fcntl.h>
+#include <stdlib.h>
+#include <sys/utsname.h>
+#include <sys/vfs.h>
+#include <windows.h>
+#define is_winnt       (GetVersion() < 0x80000000)
+
+#define ntsec_on(c)	((c) && strstr((c),"ntsec") && !strstr((c),"nontsec"))
+#define ntea_on(c)	((c) && strstr((c),"ntea") && !strstr((c),"nontea"))
+
+#if defined(open) && open == binary_open
+# undef open
+#endif
+#if defined(pipe) && open == binary_pipe
+# undef pipe
+#endif
+
+int binary_open(const char *filename, int flags, ...)
+{
+	va_list ap;
+	mode_t mode;
+	
+	va_start(ap, flags);
+	mode = va_arg(ap, mode_t);
+	va_end(ap);
+	return open(filename, flags | O_BINARY, mode);
+}
+
+int binary_pipe(int fd[2])
+{
+	int ret = pipe(fd);
+
+	if (!ret) {
+		setmode (fd[0], O_BINARY);
+		setmode (fd[1], O_BINARY);
+	}
+	return ret;
+}
+
+int check_nt_auth(int pwd_authenticated, struct passwd *pw)
+{
+	/*
+	* The only authentication which is able to change the user
+	* context on NT systems is the password authentication. So
+	* we deny all requsts for changing the user context if another
+	* authentication method is used.
+	*
+	* This doesn't apply to Cygwin versions >= 1.3.2 anymore which
+	* uses the undocumented NtCreateToken() call to create a user
+	* token if the process has the appropriate privileges and if
+	* CYGWIN ntsec setting is on.
+	*/
+	static int has_create_token = -1;
+
+	if (pw == NULL)
+		return 0;
+	if (is_winnt) {
+		if (has_create_token < 0) {
+			struct utsname uts;
+		        int major_high = 0, major_low = 0, minor = 0;
+			char *cygwin = getenv("CYGWIN");
+
+			has_create_token = 0;
+			if (ntsec_on(cygwin) && !uname(&uts)) {
+				sscanf(uts.release, "%d.%d.%d",
+				       &major_high, &major_low, &minor);
+				if (major_high > 1 ||
+				    (major_high == 1 && (major_low > 3 ||
+				     (major_low == 3 && minor >= 2))))
+					has_create_token = 1;
+			}
+		}
+		if (has_create_token < 1 &&
+		    !pwd_authenticated && geteuid() != pw->pw_uid)
+			return 0;
+	}
+	return 1;
+}
+
+int check_ntsec(const char *filename)
+{
+	char *cygwin;
+	int allow_ntea = 0;
+	int allow_ntsec = 0;
+	struct statfs fsstat;
+
+	/* Windows 95/98/ME don't support file system security at all. */
+	if (!is_winnt)
+		return 0;
+
+	/* Evaluate current CYGWIN settings. */
+	cygwin = getenv("CYGWIN");
+	allow_ntea = ntea_on(cygwin);
+	allow_ntsec = ntsec_on(cygwin);
+
+	/*
+	 * `ntea' is an emulation of POSIX attributes. It doesn't support
+	 * real file level security as ntsec on NTFS file systems does
+	 * but it supports FAT filesystems. `ntea' is minimum requirement
+	 * for security checks.
+	 */
+	if (allow_ntea)
+		return 1;
+
+	/*
+	 * Retrieve file system flags. In Cygwin, file system flags are
+	 * copied to f_type which has no meaning in Win32 itself.
+	 */
+	if (statfs(filename, &fsstat))
+		return 1;
+
+	/*
+	 * Only file systems supporting ACLs are able to set permissions.
+	 * `ntsec' is the setting in Cygwin which switches using of NTFS
+	 * ACLs to support POSIX permissions on files.
+	 */
+	if (fsstat.f_type & FS_PERSISTENT_ACLS)
+		return allow_ntsec;
+
+	return 0;
+}
+
+void register_9x_service(void)
+{
+        HINSTANCE kerneldll;
+        DWORD (*RegisterServiceProcess)(DWORD, DWORD);
+
+	/* The service register mechanism in 9x/Me is pretty different from
+	 * NT/2K/XP.  In NT/2K/XP we're using a special service starter
+	 * application to register and control sshd as service.  This method
+	 * doesn't play nicely with 9x/Me.  For that reason we register here
+	 * as service when running under 9x/Me.  This function is only called
+	 * by the child sshd when it's going to daemonize.
+	 */
+	if (is_winnt)
+		return;
+	if (! (kerneldll = LoadLibrary("KERNEL32.DLL")))
+		return;
+	if (! (RegisterServiceProcess = (DWORD (*)(DWORD, DWORD))
+			  GetProcAddress(kerneldll, "RegisterServiceProcess")))
+		return;
+	RegisterServiceProcess(0, 1);
+}
+
+#endif /* HAVE_CYGWIN */