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 // )
time(time_t * timer)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 //
gmtime(const time_t * timer)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 }
166