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