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, 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 SECSPERHOUR (60 * 60)
  26 #define SECSPERDAY  (24 * SECSPERHOUR)
  27
  28 //
  29 //  The arrays give the cumulative number of days up to the first of the
  30 //  month number used as the index (1 -> 12) for regular and leap years.
  31 //  The value at index 13 is for the whole year.
  32 //
  33 UINTN CumulativeDays[2][14] = {
  34   {
  35     0,
  36     0,
  37     31,
  38     31 + 28,
  39     31 + 28 + 31,
  40     31 + 28 + 31 + 30,
  41     31 + 28 + 31 + 30 + 31,
  42     31 + 28 + 31 + 30 + 31 + 30,
  43     31 + 28 + 31 + 30 + 31 + 30 + 31,
  44     31 + 28 + 31 + 30 + 31 + 30 + 31 + 31,
  45     31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30,
  46     31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31,
  47     31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30,
  48     31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30 + 31
  49   },
  50   {
  51     0,
  52     0,
  53     31,
  54     31 + 29,
  55     31 + 29 + 31,
  56     31 + 29 + 31 + 30,
  57     31 + 29 + 31 + 30 + 31,
  58     31 + 29 + 31 + 30 + 31 + 30,
  59     31 + 29 + 31 + 30 + 31 + 30 + 31,
  60     31 + 29 + 31 + 30 + 31 + 30 + 31 + 31,
  61     31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + 30,
  62     31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31,
  63     31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30,
  64     31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30 + 31
  65   }
  66 };
  67
  68 /* Get the system time as seconds elapsed since midnight, January 1, 1970. */
  69 //INTN time(
  70 //  INTN *timer
  71 //  )
  72 time_t time (time_t *timer)
  73 {
  74   EFI_TIME  Time;
  75   UINTN     Year;
  76
  77   //
  78   // Get the current time and date information
  79   //
  80   gRT->GetTime (&Time, NULL);
  81
  82   //
  83   // Years Handling
  84   // UTime should now be set to 00:00:00 on Jan 1 of the current year.
  85   //
  86   for (Year = 1970, *timer = 0; Year != Time.Year; Year++) {
  87     *timer = *timer + (time_t)(CumulativeDays[IsLeap(Year)][13] * SECSPERDAY);
  88   }
  89
  90   //
  91   // Add in number of seconds for current Month, Day, Hour, Minute, Seconds, and TimeZone adjustment
  92   //
  93   *timer = *timer +
  94            (time_t)((Time.TimeZone != EFI_UNSPECIFIED_TIMEZONE) ? (Time.TimeZone * 60) : 0) +
  95            (time_t)(CumulativeDays[IsLeap(Time.Year)][Time.Month] * SECSPERDAY) +
  96            (time_t)(((Time.Day > 0) ? Time.Day - 1 : 0) * SECSPERDAY) +
  97            (time_t)(Time.Hour * SECSPERHOUR) +
  98            (time_t)(Time.Minute * 60) +
  99            (time_t)Time.Second;
 100
 101   return *timer;
 102 }