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 - 2018, 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 <CrtLibSupport.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_STATUS  Status;
  76   EFI_TIME    Time;
  77   time_t      CalTime;
  78   UINTN       Year;
  79
  80   //
  81   // Get the current time and date information
  82   //
  83   Status = gRT->GetTime (&Time, NULL);
  84   if (EFI_ERROR (Status) || (Time.Year < 1970)) {
  85     return 0;
  86   }
  87
  88   //
  89   // Years Handling
  90   // UTime should now be set to 00:00:00 on Jan 1 of the current year.
  91   //
  92   for (Year = 1970, CalTime = 0; Year != Time.Year; Year++) {
  93     CalTime = CalTime + (time_t)(CumulativeDays[IsLeap(Year)][13] * SECSPERDAY);
  94   }
  95
  96   //
  97   // Add in number of seconds for current Month, Day, Hour, Minute, Seconds, and TimeZone adjustment
  98   //
  99   CalTime = CalTime +
 100             (time_t)((Time.TimeZone != EFI_UNSPECIFIED_TIMEZONE) ? (Time.TimeZone * 60) : 0) +
 101             (time_t)(CumulativeDays[IsLeap(Time.Year)][Time.Month] * SECSPERDAY) +
 102             (time_t)(((Time.Day > 0) ? Time.Day - 1 : 0) * SECSPERDAY) +
 103             (time_t)(Time.Hour * SECSPERHOUR) +
 104             (time_t)(Time.Minute * 60) +
 105             (time_t)Time.Second;
 106
 107   if (timer != NULL) {
 108     *timer = CalTime;
 109   }
 110
 111   return CalTime;
 112 }
 113
 114 //
 115 // Convert a time value from type time_t to struct tm.
 116 //
 117 struct tm * gmtime (const time_t *timer)
 118 {
 119   struct tm  *GmTime;
 120   UINT16     DayNo;
 121   UINT16     DayRemainder;
 122   time_t     Year;
 123   time_t     YearNo;
 124   UINT16     TotalDays;
 125   UINT16     MonthNo;
 126
 127   if (timer == NULL) {
 128     return NULL;
 129   }
 130
 131   GmTime = malloc (sizeof (struct tm));
 132   if (GmTime == NULL) {
 133     return NULL;
 134   }
 135
 136   ZeroMem ((VOID *) GmTime, (UINTN) sizeof (struct tm));
 137
 138   DayNo        = (UINT16) (*timer / SECSPERDAY);
 139   DayRemainder = (UINT16) (*timer % SECSPERDAY);
 140
 141   GmTime->tm_sec  = (int) (DayRemainder % SECSPERMIN);
 142   GmTime->tm_min  = (int) ((DayRemainder % SECSPERHOUR) / SECSPERMIN);
 143   GmTime->tm_hour = (int) (DayRemainder / SECSPERHOUR);
 144   GmTime->tm_wday = (int) ((DayNo + 4) % 7);
 145
 146   for (Year = 1970, YearNo = 0; DayNo > 0; Year++) {
 147     TotalDays = (UINT16) (IsLeap (Year) ? 366 : 365);
 148     if (DayNo >= TotalDays) {
 149       DayNo = (UINT16) (DayNo - TotalDays);
 150       YearNo++;
 151     } else {
 152       break;
 153     }
 154   }
 155
 156   GmTime->tm_year = (int) (YearNo + (1970 - 1900));
 157   GmTime->tm_yday = (int) DayNo;
 158
 159   for (MonthNo = 12; MonthNo > 1; MonthNo--) {
 160     if (DayNo >= CumulativeDays[IsLeap(Year)][MonthNo]) {
 161       DayNo = (UINT16) (DayNo - (UINT16) (CumulativeDays[IsLeap(Year)][MonthNo]));
 162       break;
 163     }
 164   }
 165
 166   GmTime->tm_mon  = (int) MonthNo - 1;
 167   GmTime->tm_mday = (int) DayNo + 1;
 168
 169   GmTime->tm_isdst  = 0;
 170   GmTime->tm_gmtoff = 0;
 171   GmTime->tm_zone   = NULL;
 172
 173   return GmTime;
 174 }