CryptoPkg/Library/BaseCryptLib/SysCall/TimerWrapper.c

   1 /** @file
   2   C Run-Time Libraries (CRT) Time Management Routines Wrapper Implementation
   3   for OpenSSL-based Cryptographic Library (used in DXE & RUNTIME).
   4
   5 Copyright (c) 2010 - 2011, Intel Corporation. All rights reserved.<BR>
   6 This program and the accompanying materials
   7 are licensed and made available under the terms and conditions of the BSD License
   8 which accompanies this distribution.  The full text of the license may be found at
   9 http://opensource.org/licenses/bsd-license.php
  10
  11 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  12 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  13
  14 **/
  15
  16 #include <Uefi.h>
  17 #include <OpenSslSupport.h>
  18 #include <Library/UefiRuntimeServicesTableLib.h>
  19
  20 //
  21 // -- Time Management Routines --
  22 //
  23
  24 #define IsLeap(y)   (((y) % 4) == 0 && (((y) % 100) != 0 || ((y) % 400) == 0))
  25 #define SECSPERMIN  (60)
  26 #define SECSPERHOUR (60 * 60)
  27 #define SECSPERDAY  (24 * SECSPERHOUR)
  28
  29 //
  30 //  The arrays give the cumulative number of days up to the first of the
  31 //  month number used as the index (1 -> 12) for regular and leap years.
  32 //  The value at index 13 is for the whole year.
  33 //
  34 UINTN CumulativeDays[2][14] = {
  35   {
  36     0,
  37     0,
  38     31,
  39     31 + 28,
  40     31 + 28 + 31,
  41     31 + 28 + 31 + 30,
  42     31 + 28 + 31 + 30 + 31,
  43     31 + 28 + 31 + 30 + 31 + 30,
  44     31 + 28 + 31 + 30 + 31 + 30 + 31,
  45     31 + 28 + 31 + 30 + 31 + 30 + 31 + 31,
  46     31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30,
  47     31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31,
  48     31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30,
  49     31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30 + 31
  50   },
  51   {
  52     0,
  53     0,
  54     31,
  55     31 + 29,
  56     31 + 29 + 31,
  57     31 + 29 + 31 + 30,
  58     31 + 29 + 31 + 30 + 31,
  59     31 + 29 + 31 + 30 + 31 + 30,
  60     31 + 29 + 31 + 30 + 31 + 30 + 31,
  61     31 + 29 + 31 + 30 + 31 + 30 + 31 + 31,
  62     31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + 30,
  63     31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31,
  64     31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30,
  65     31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30 + 31
  66   }
  67 };
  68
  69 /* Get the system time as seconds elapsed since midnight, January 1, 1970. */
  70 //INTN time(
  71 //  INTN *timer
  72 //  )
  73 time_t time (time_t *timer)
  74 {
  75   EFI_TIME  Time;
  76   UINTN     Year;
  77
  78   //
  79   // Get the current time and date information
  80   //
  81   gRT->GetTime (&Time, NULL);
  82
  83   //
  84   // Years Handling
  85   // UTime should now be set to 00:00:00 on Jan 1 of the current year.
  86   //
  87   for (Year = 1970, *timer = 0; Year != Time.Year; Year++) {
  88     *timer = *timer + (time_t)(CumulativeDays[IsLeap(Year)][13] * SECSPERDAY);
  89   }
  90
  91   //
  92   // Add in number of seconds for current Month, Day, Hour, Minute, Seconds, and TimeZone adjustment
  93   //
  94   *timer = *timer +
  95            (time_t)((Time.TimeZone != EFI_UNSPECIFIED_TIMEZONE) ? (Time.TimeZone * 60) : 0) +
  96            (time_t)(CumulativeDays[IsLeap(Time.Year)][Time.Month] * SECSPERDAY) +
  97            (time_t)(((Time.Day > 0) ? Time.Day - 1 : 0) * SECSPERDAY) +
  98            (time_t)(Time.Hour * SECSPERHOUR) +
  99            (time_t)(Time.Minute * 60) +
 100            (time_t)Time.Second;
 101
 102   return *timer;
 103 }
 104
 105 //
 106 // Convert a time value from type time_t to struct tm.
 107 //
 108 struct tm * gmtime (const time_t *timer)
 109 {
 110   struct tm  *GmTime;
 111   UINT16     DayNo;
 112   UINT16     DayRemainder;
 113   time_t     Year;
 114   time_t     YearNo;
 115   UINT16     TotalDays;
 116   UINT16     MonthNo;
 117
 118   if (timer == NULL) {
 119     return NULL;
 120   }
 121
 122   GmTime = malloc (sizeof (struct tm));
 123   if (GmTime == NULL) {
 124     return NULL;
 125   }
 126
 127   ZeroMem ((VOID *) GmTime, (UINTN) sizeof (struct tm));
 128
 129   DayNo        = (UINT16) (*timer / SECSPERDAY);
 130   DayRemainder = (UINT16) (*timer % SECSPERDAY);
 131
 132   GmTime->tm_sec  = (int) (DayRemainder % SECSPERMIN);
 133   GmTime->tm_min  = (int) ((DayRemainder % SECSPERHOUR) / SECSPERMIN);
 134   GmTime->tm_hour = (int) (DayRemainder / SECSPERHOUR);
 135   GmTime->tm_wday = (int) ((DayNo + 4) % 7);
 136
 137   for (Year = 1970, YearNo = 0; DayNo > 0; Year++) {
 138     TotalDays = (UINT16) (IsLeap (Year) ? 366 : 365);
 139     if (DayNo >= TotalDays) {
 140       DayNo = (UINT16) (DayNo - TotalDays);
 141       YearNo++;
 142     } else {
 143       break;
 144     }
 145   }
 146
 147   GmTime->tm_year = (int) (YearNo + (1970 - 1900));
 148   GmTime->tm_yday = (int) DayNo;
 149
 150   for (MonthNo = 12; MonthNo > 1; MonthNo--) {
 151     if (DayNo >= CumulativeDays[IsLeap(Year)][MonthNo]) {
 152       DayNo = (UINT16) (DayNo - (UINT16) (CumulativeDays[IsLeap(Year)][MonthNo]));
 153       break;
 154     }
 155   }
 156
 157   GmTime->tm_mon  = (int) MonthNo - 1;
 158   GmTime->tm_mday = (int) DayNo + 1;
 159
 160   GmTime->tm_isdst  = 0;
 161   GmTime->tm_gmtoff = 0;
 162   GmTime->tm_zone   = NULL;
 163
 164   return GmTime;
 165 }