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/* -*- 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_timestamp sec;
krb5_int32 usec;
krb5_error_code retval;
retval = krb5_crypto_us_timeofday(&sec, &usec);
if (retval)
return retval;
os_ctx->time_offset = ts_delta(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;
}
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