1/* 2 * Copyright (c) 1997-2004 Kungliga Tekniska Högskolan 3 * (Royal Institute of Technology, Stockholm, Sweden). 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * 3. Neither the name of the Institute nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34#include "krb5_locl.h" 35 36/** 37 * Set the absolute time that the caller knows the kdc has so the 38 * kerberos library can calculate the relative diffrence beteen the 39 * KDC time and local system time. 40 * 41 * @param context Keberos 5 context. 42 * @param sec The applications new of "now" in seconds 43 * @param usec The applications new of "now" in micro seconds 44 45 * @return Kerberos 5 error code, see krb5_get_error_message(). 46 * 47 * @ingroup krb5 48 */ 49 50KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL 51krb5_set_real_time (krb5_context context, 52 krb5_timestamp sec, 53 int32_t usec) 54{ 55 struct timeval tv; 56 57 gettimeofday(&tv, NULL); 58 59 context->kdc_sec_offset = (uint32_t)(sec - tv.tv_sec); 60 61 /** 62 * If the caller passes in a negative usec, its assumed to be 63 * unknown and the function will use the current time usec. 64 */ 65 if (usec >= 0) { 66 context->kdc_usec_offset = usec - tv.tv_usec; 67 68 if (context->kdc_usec_offset < 0) { 69 context->kdc_sec_offset--; 70 context->kdc_usec_offset += 1000000; 71 } 72 } else 73 context->kdc_usec_offset = tv.tv_usec; 74 75 return 0; 76} 77 78/* 79 * return ``corrected'' time in `timeret'. 80 */ 81 82KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL 83krb5_timeofday (krb5_context context, 84 krb5_timestamp *timeret) 85{ 86 *timeret = time(NULL); 87 if (context) 88 *timeret += context->kdc_sec_offset; 89 return 0; 90} 91 92/* 93 * like gettimeofday but with time correction to the KDC 94 */ 95 96KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL 97krb5_us_timeofday (krb5_context context, 98 krb5_timestamp *sec, 99 int32_t *usec) 100{ 101 struct timeval tv; 102 103 gettimeofday (&tv, NULL); 104 105 *sec = tv.tv_sec; 106 if (context) 107 *sec += context->kdc_sec_offset; 108 *usec = tv.tv_usec; 109 return 0; 110} 111 112KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL 113krb5_format_time(krb5_context context, time_t t, 114 char *s, size_t len, krb5_boolean include_time) 115{ 116 struct tm *tm; 117 if(context->log_utc) 118 tm = gmtime (&t); 119 else 120 tm = localtime(&t); 121 if(tm == NULL || 122 strftime(s, len, include_time ? context->time_fmt : context->date_fmt, tm) == 0) 123 snprintf(s, len, "%ld", (long)t); 124 return 0; 125} 126 127KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL 128krb5_string_to_deltat(const char *string, krb5_deltat *deltat) 129{ 130 if((*deltat = parse_time(string, "s")) == -1) 131 return KRB5_DELTAT_BADFORMAT; 132 return 0; 133} 134 135krb5_deltat 136krb5_time_abs(krb5_deltat t1, krb5_deltat t2) 137{ 138 krb5_deltat t = t1 - t2; 139 if (t < 0) 140 return -t; 141 return t; 142} 143