--- /dev/null
+/*
+ * lib/krb5/os/toffset.c
+ *
+ * Copyright 1995 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. 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.
+ *
+ * These routines manipulates the time offset fields in the os context.
+ */
+
+#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
+ */
+krb5_error_code
+krb5_set_real_time(context, seconds, microseconds)
+ krb5_context context;
+ krb5_int32 seconds, 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 - usec;
+ 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(context, seconds, microseconds)
+ krb5_context context;
+ krb5_int32 seconds, 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(context)
+ 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_get_time_offsets(context, seconds, microseconds)
+ krb5_context context;
+ krb5_int32 *seconds, *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(context, seconds, microseconds)
+ krb5_context context;
+ krb5_int32 seconds, 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;
+}
* this software for any purpose. It is provided "as is" without express
* or implied warranty.
*
- * Just a stub that calls krb5_crypto_us_timeofday().
- *
+ * krb5_crypto_us_timeofday() does all of the real work; however, we
+ * handle the time offset adjustment here, since this is context
+ * specific, and the crypto version of this call doesn't have access
+ * to the context variable. Fortunately the only user of
+ * krb5_crypto_us_timeofday in the crypto library doesn't require that
+ * this time adjustment be done.
*/
#include "k5-int.h"
krb5_context context;
krb5_int32 *seconds, *microseconds;
{
- return krb5_crypto_us_timeofday(seconds, microseconds);
+ krb5_os_context os_ctx = context->os_context;
+ krb5_int32 sec, usec;
+ krb5_error_code retval;
+
+ if (os_ctx->os_flags & KRB5_OS_TOFFSET_TIME) {
+ *seconds = os_ctx->time_offset;
+ *microseconds = os_ctx->usec_offset;
+ return 0;
+ }
+ retval = krb5_crypto_us_timeofday(&sec, &usec);
+ if (retval)
+ return retval;
+ if (os_ctx->os_flags & KRB5_OS_TOFFSET_VALID) {
+ usec += os_ctx->usec_offset;
+ if (usec > 1000000) {
+ usec -= 1000000;
+ sec++;
+ }
+ sec += os_ctx->time_offset;
+ }
+ *seconds = sec;
+ *microseconds = usec;
+ return 0;
}
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