Add krb5int_gettimeofday to k5sprt for platforms w/o native gettimeofday

Microsecond accuracy on _WIN32, but only one second accuracy on other,
AFAIK purely hypothetical, platforms that lack native gettimeofday.
Shamelessly cribbed from Heimdal.

Signed-off-by: Kevin Wasserman <kevin.wasserman@painless-security.com>

git-svn-id: svn://anonsvn.mit.edu/krb5/trunk@25310 dc483132-0cff-0310-8789-dd5450dbe970

4 files changed, 127 insertions, 1 deletions

diff --git a/src/configure.in b/src/configure.in
index 6c3eebcc44..7bb1a6cbde 100644
--- a/src/configure.in
+++ b/src/configure.in
@@ -229,6 +229,17 @@ MKSTEMP_OBJ='$(OUTPRE)mkstemp.$(OBJEXT)'
 EXTRA_SUPPORT_SYMS="$EXTRA_SUPPORT_SYMS krb5int_mkstemp"])
 AC_SUBST(MKSTEMP_OBJ)
 AC_SUBST(MKSTEMP_ST_OBJ)
+
+AC_CHECK_FUNC(gettimeofday,
+	[GETTIMEOFDAY_ST_OBJ=
+	GETTIMEOFDAY_OBJ=
+	AC_DEFINE(HAVE_GETTIMEOFDAY, 1, [Have the gettimeofday function])
+],
+	[GETTIMEOFDAY_ST_OBJ='gettimeofday.o'
+	GETTIMEOFDAY_OBJ='$(OUTPRE)gettimeofday.$(OBJEXT)'
+	EXTRA_SUPPORT_SYMS="$EXTRA_SUPPORT_SYMS krb5int_gettimeofday"])
+AC_SUBST(GETTIMEOFDAY_OBJ)
+AC_SUBST(GETTIMEOFDAY_ST_OBJ)
 AC_SUBST(EXTRA_SUPPORT_SYMS)
 
 DECLARE_SYS_ERRLIST
diff --git a/src/include/k5-platform.h b/src/include/k5-platform.h
index e9155cefb4..77d710b499 100644
--- a/src/include/k5-platform.h
+++ b/src/include/k5-platform.h
@@ -1031,6 +1031,11 @@ extern int krb5int_mkstemp(char *);
 #define mkstemp krb5int_mkstemp
 #endif
 
+#ifndef HAVE_GETTIMEOFDAY
+extern int krb5int_gettimeofday(struct timeval *tp, void *ignore);
+#define gettimeofday krb5int_gettimeofday
+#endif
+
 extern void krb5int_zap(void *ptr, size_t len);
 
 /*
diff --git a/src/util/support/Makefile.in b/src/util/support/Makefile.in
index b3dc4fcfce..6c059c07d8 100644
--- a/src/util/support/Makefile.in
+++ b/src/util/support/Makefile.in
@@ -23,6 +23,11 @@ LIBMINOR=1
 LIBINITFUNC=krb5int_thread_support_init
 LIBFINIFUNC=krb5int_thread_support_fini
 
+GETTIMEOFDAY_ST_OBJ= @GETTIMEOFDAY_ST_OBJ@
+GETTIMEOFDAY_OBJ= @GETTIMEOFDAY_OBJ@
+##DOS##GETTIMEOFDAY_ST_OBJ= gettimeofday.o
+##DOS##GETTIMEOFDAY_OBJ= $(OUTPRE)gettimeofday.$(OBJEXT)
+
 MKSTEMP_ST_OBJ= @MKSTEMP_ST_OBJ@
 MKSTEMP_OBJ= @MKSTEMP_OBJ@
 ##DOS##MKSTEMP_ST_OBJ= mkstemp.o
@@ -69,6 +74,7 @@ STLIBOBJS= \
 	utf8_conv.o \
 	zap.o \
 	path.o \
+	$(GETTIMEOFDAY_ST_OBJ) \
 	$(IPC_ST_OBJ) \
 	$(STRLCPY_ST_OBJ) \
 	$(FNMATCH_ST_OBJ) \
@@ -87,6 +93,7 @@ LIBOBJS= \
 	$(OUTPRE)utf8_conv.$(OBJEXT) \
 	$(OUTPRE)zap.$(OBJEXT) \
 	$(OUTPRE)path.$(OBJEXT) \
+	$(GETTIMEOFDAY_OBJ) \
 	$(IPC_OBJ) \
 	$(STRLCPY_OBJ) \
 	$(FNMATCH_OBJ) \
@@ -108,6 +115,7 @@ SRCS=\
 	$(srcdir)/fake-addrinfo.c \
 	$(srcdir)/utf8.c \
 	$(srcdir)/utf8_conv.c \
+	$(srcdir)/gettimeofday.c \
 	$(srcdir)/strlcpy.c \
 	$(srcdir)/fnmatch.c \
 	$(srcdir)/printf.c \
@@ -145,7 +153,7 @@ SHLIB_EXPORT_FILE=libkrb5support.exports
 
 EXTRA_SUPPORT_SYMS= @EXTRA_SUPPORT_SYMS@
 ##DOS##EXTRA_SUPPORT_SYMS= krb5int_mkstemp krb5int_strlcpy krb5int_strlcat \
-##DOS##		krb5int_vasprintf krb5int_asprintf $(IPC_SYMS)
+##DOS##		krb5int_vasprintf krb5int_asprintf krb5int_gettimeofday $(IPC_SYMS)
 
 ##DOS##!if 0
 libkrb5support.exports: $(srcdir)/libkrb5support-fixed.exports Makefile
diff --git a/src/util/support/gettimeofday.c b/src/util/support/gettimeofday.c
new file mode 100644
index 0000000000..e31f38b9c3
--- /dev/null
+++ b/src/util/support/gettimeofday.c
@@ -0,0 +1,102 @@
+/* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */
+/* util/support/gettimeofday.c */
+/*
+ * Copyright (C) 2011 by the Massachusetts Institute of Technology.
+ * All rights reserved.
+ *
+ * Export of this software from the United States of America may
+ *   require a specific license from the United States Government.
+ *   It is the responsibility of any person or organization contemplating
+ *   export to obtain such a license before exporting.
+ *
+ * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
+ * distribute this software and its documentation for any purpose and
+ * without fee is hereby granted, provided that the above copyright
+ * notice appear in all copies and that both that copyright notice and
+ * this permission notice appear in supporting documentation, and that
+ * the name of M.I.T. not be used in advertising or publicity pertaining
+ * to distribution of the software without specific, written prior
+ * permission.  Furthermore if you modify this software you must label
+ * your software as modified software and not distribute it in such a
+ * fashion that it might be confused with the original M.I.T. software.
+ * M.I.T. makes no representations about the suitability of
+ * this software for any purpose.  It is provided "as is" without express
+ * or implied warranty.
+ */
+/*
+ * Copyright (c) 1995, 1996, 1997 Kungliga Tekniska Högskolan
+ * (Royal Institute of Technology, Stockholm, Sweden).
+ * All rights reserved.
+ *
+ * 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.
+ *
+ * 3. Neither the name of the Institute nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``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 INSTITUTE OR CONTRIBUTORS 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.
+ */
+
+#include "k5-platform.h"
+
+#ifdef _WIN32
+
+#include <winsock2.h>
+
+int
+krb5int_gettimeofday (struct timeval *tp, void *ignore)
+{
+    FILETIME ft;
+    ULARGE_INTEGER li;
+    ULONGLONG ull;
+
+    GetSystemTimeAsFileTime(&ft);
+    li.LowPart = ft.dwLowDateTime;
+    li.HighPart = ft.dwHighDateTime;
+    ull = li.QuadPart;
+
+    ull -= 116444736000000000i64;
+    ull /= 10i64;               /* ull is now in microseconds */
+
+    tp->tv_usec = (long)(ull % 1000000i64);
+    tp->tv_sec  = (long)(ull / 1000000i64);
+
+    return 0;
+}
+
+#else
+
+/*
+ * Simple gettimeofday that only returns seconds.
+ */
+int
+krb5int_gettimeofday (struct timeval *tp, void *ignore)
+{
+     time_t t;
+
+     t = time(NULL);
+     tp->tv_sec  = (long) t;
+     tp->tv_usec = 0;
+     return 0;
+}
+
+#endif  /* !_WIN32 */