OSX/libsecurity_apple_x509_tp/lib/tpTime.h

   1 /*
   2  * Copyright (c) 2000-2001,2011,2014 Apple Inc. All Rights Reserved.
   3  *
   4  * The contents of this file constitute Original Code as defined in and are
   5  * subject to the Apple Public Source License Version 1.2 (the 'License').
   6  * You may not use this file except in compliance with the License. Please obtain
   7  * a copy of the License at http://www.apple.com/publicsource and read it before
   8  * using this file.
   9  *
  10  * This Original Code and all software distributed under the License are
  11  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS
  12  * OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, INCLUDING WITHOUT
  13  * LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
  14  * PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. Please see the License for the
  15  * specific language governing rights and limitations under the License.
  16  */
  17
  18
  19 /*
  20  * tpTime.h - cert related time functions
  21  *
  22  */
  23
  24 #ifndef _TP_TIME_H_
  25 #define _TP_TIME_H_
  26
  27 #include <time.h>
  28 #include <CoreFoundation/CoreFoundation.h>
  29 #include <Security/cssmtype.h>
  30
  31 #ifdef  __cplusplus
  32 extern "C" {
  33 #endif
  34
  35 /* lengths of time strings without trailing NULL */
  36 #define UTC_TIME_NOSEC_LEN                      11
  37 #define UTC_TIME_STRLEN                         13
  38 #define CSSM_TIME_STRLEN                        14              /* no trailing 'Z' */
  39 #define GENERALIZED_TIME_STRLEN         15
  40 #define LOCALIZED_UTC_TIME_STRLEN       17
  41 #define LOCALIZED_TIME_STRLEN           19
  42
  43 /*
  44  * Given a string containing either a UTC-style or "generalized time"
  45  * time string, convert to a CFDateRef. Returns nonzero on
  46  * error.
  47  */
  48 extern int timeStringToCfDate(
  49         const char                      *str,
  50         unsigned                        len,
  51         CFDateRef                       *cfDate);
  52
  53 /*
  54  * Compare two times. Assumes they're both in GMT. Returns:
  55  * -1 if t1 <  t2
  56  *  0 if t1 == t2
  57  *  1 if t1 >  t2
  58  */
  59 extern int compareTimes(
  60         CFDateRef       t1,
  61         CFDateRef       t2);
  62
  63 /*
  64  * Create a time string, in either UTC (2-digit) or or Generalized (4-digit)
  65  * year format. Caller mallocs the output string whose length is at least
  66  * (UTC_TIME_STRLEN+1), (GENERALIZED_TIME_STRLEN+1), or (CSSM_TIME_STRLEN+1)
  67  * respectively. Caller must hold tpTimeLock.
  68  */
  69 typedef enum {
  70         TIME_UTC,
  71         TIME_GEN,
  72         TIME_CSSM
  73 } TpTimeSpec;
  74
  75 void timeAtNowPlus(unsigned secFromNow,
  76         TpTimeSpec timeSpec,
  77         char *outStr);
  78
  79 /*
  80  * Convert a time string, which can be in any of three forms (UTC,
  81  * generalized, or CSSM_TIMESTRING) into a CSSM_TIMESTRING. Caller
  82  * mallocs the result, which must be at least (CSSM_TIME_STRLEN+1) bytes.
  83  * Returns nonzero if incoming time string is badly formed.
  84  */
  85 int tpTimeToCssmTimestring(
  86         const char      *inStr,                 // not necessarily NULL terminated
  87         unsigned        inStrLen,               // not including possible NULL
  88         char            *outTime);              // caller mallocs
  89
  90 #ifdef  __cplusplus
  91 }
  92 #endif
  93
  94 #endif  /* _TP_TIME_H_*/