1 files changed, 118 insertions, 0 deletions
diff --git a/src/lib/krb5/os/toffset.c b/src/lib/krb5/os/toffset.c
new file mode 100644
index 000000000000..456193a41aed
--- /dev/null
+++ b/src/lib/krb5/os/toffset.c
@@ -0,0 +1,118 @@
+/* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */
+/* lib/krb5/os/toffset.c - Manipulate time offset fields in os context */
+/*
+ * Copyright 1995, 2007 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.
+ */
+
+#include "k5-int.h"
+
+/*
+ * This routine takes the "real time" as input, and sets the time
+ * offset field in the context structure so that the krb5 time
+ * routines will return the correct time as corrected by difference
+ * between the system time and the "real time" as passed to this
+ * routine
+ *
+ * If the real time microseconds are given as -1 the caller doesn't
+ * know the microseconds value so the usec offset is always zero.
+ */
+krb5_error_code KRB5_CALLCONV
+krb5_set_real_time(krb5_context context, krb5_timestamp seconds, krb5_int32 microseconds)
+{
+    krb5_os_context os_ctx = &context->os_context;
+    krb5_int32 sec, usec;
+    krb5_error_code retval;
+
+    retval = krb5_crypto_us_timeofday(&sec, &usec);
+    if (retval)
+        return retval;
+
+    os_ctx->time_offset = seconds - sec;
+    os_ctx->usec_offset = (microseconds > -1) ? microseconds - usec : 0;
+
+    os_ctx->os_flags = ((os_ctx->os_flags & ~KRB5_OS_TOFFSET_TIME) |
+                        KRB5_OS_TOFFSET_VALID);
+    return 0;
+}
+
+/*
+ * This routine sets the krb5 time routines so that they will return
+ * the seconds and microseconds value as input to this function.  This
+ * is useful for running the krb5 routines through test suites
+ */
+krb5_error_code
+krb5_set_debugging_time(krb5_context context, krb5_timestamp seconds, krb5_int32 microseconds)
+{
+    krb5_os_context os_ctx = &context->os_context;
+
+    os_ctx->time_offset = seconds;
+    os_ctx->usec_offset = microseconds;
+    os_ctx->os_flags = ((os_ctx->os_flags & ~KRB5_OS_TOFFSET_VALID) |
+                        KRB5_OS_TOFFSET_TIME);
+    return 0;
+}
+
+/*
+ * This routine turns off the time correction fields, so that the krb5
+ * routines return the "natural" time.
+ */
+krb5_error_code
+krb5_use_natural_time(krb5_context context)
+{
+    krb5_os_context os_ctx = &context->os_context;
+
+    os_ctx->os_flags &= ~(KRB5_OS_TOFFSET_VALID|KRB5_OS_TOFFSET_TIME);
+
+    return 0;
+}
+
+/*
+ * This routine returns the current time offsets in use.
+ */
+krb5_error_code KRB5_CALLCONV
+krb5_get_time_offsets(krb5_context context, krb5_timestamp *seconds, krb5_int32 *microseconds)
+{
+    krb5_os_context os_ctx = &context->os_context;
+
+    if (seconds)
+        *seconds = os_ctx->time_offset;
+    if (microseconds)
+        *microseconds = os_ctx->usec_offset;
+    return 0;
+}
+
+
+/*
+ * This routine sets the time offsets directly.
+ */
+krb5_error_code
+krb5_set_time_offsets(krb5_context context, krb5_timestamp seconds, krb5_int32 microseconds)
+{
+    krb5_os_context os_ctx = &context->os_context;
+
+    os_ctx->time_offset = seconds;
+    os_ctx->usec_offset = microseconds;
+    os_ctx->os_flags = ((os_ctx->os_flags & ~KRB5_OS_TOFFSET_TIME) |
+                        KRB5_OS_TOFFSET_VALID);
+    return 0;
+}