1 /* 2 * lib/krb5/os/ustime.c 3 * 4 * Copyright 1990,1991 by the Massachusetts Institute of Technology. 5 * All Rights Reserved. 6 * 7 * Export of this software from the United States of America may 8 * require a specific license from the United States Government. 9 * It is the responsibility of any person or organization contemplating 10 * export to obtain such a license before exporting. 11 * 12 * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and 13 * distribute this software and its documentation for any purpose and 14 * without fee is hereby granted, provided that the above copyright 15 * notice appear in all copies and that both that copyright notice and 16 * this permission notice appear in supporting documentation, and that 17 * the name of M.I.T. not be used in advertising or publicity pertaining 18 * to distribution of the software without specific, written prior 19 * permission. Furthermore if you modify this software you must label 20 * your software as modified software and not distribute it in such a 21 * fashion that it might be confused with the original M.I.T. software. 22 * M.I.T. makes no representations about the suitability of 23 * this software for any purpose. It is provided "as is" without express 24 * or implied warranty. 25 * 26 * krb5_crypto_us_timeofday() does all of the real work; however, we 27 * handle the time offset adjustment here, since this is context 28 * specific, and the crypto version of this call doesn't have access 29 * to the context variable. Fortunately the only user of 30 * krb5_crypto_us_timeofday in the crypto library doesn't require that 31 * this time adjustment be done. 32 */ 33 34 #include "k5-int.h" 35 36 krb5_error_code KRB5_CALLCONV 37 krb5_us_timeofday(krb5_context context, krb5_timestamp *seconds, krb5_int32 *microseconds) 38 { 39 krb5_os_context os_ctx = context->os_context; 40 krb5_int32 sec, usec; 41 krb5_error_code retval; 42 43 if (os_ctx->os_flags & KRB5_OS_TOFFSET_TIME) { 44 *seconds = os_ctx->time_offset; 45 *microseconds = os_ctx->usec_offset; 46 return 0; 47 } 48 retval = krb5_crypto_us_timeofday(&sec, &usec); 49 if (retval) 50 return retval; 51 if (os_ctx->os_flags & KRB5_OS_TOFFSET_VALID) { 52 usec += os_ctx->usec_offset; 53 if (usec > 1000000) { 54 usec -= 1000000; 55 sec++; 56 } 57 if (usec < 0) { 58 usec += 1000000; 59 sec--; 60 } 61 sec += os_ctx->time_offset; 62 } 63 *seconds = sec; 64 *microseconds = usec; 65 return 0; 66 } 67