Security/libsecurity_cdsa_utilities/lib/cssmdates.cpp

   1 /*
   2  * Copyright (c) 2000-2004,2006,2011-2012,2014 Apple Inc. All Rights Reserved.
   3  *
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   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this
  11  * file.
  12  *
  13  * The Original Code and all software distributed under the License are
  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
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  18  * Please see the License for the specific language governing rights and
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  22  */
  23
  24
  25 //
  26 // Manage the Tower of Babel of CSSM dates and times
  27 //
  28 #include <security_cdsa_utilities/cssmdates.h>
  29 #include <security_cdsa_utilities/cssmerrors.h>
  30 #include <Security/cssm.h>
  31 #include <string>
  32
  33
  34 //
  35 // A (private) PODwrapper for CFGregorianDate
  36 //
  37 struct Gregorian : public PodWrapper<Gregorian, CFGregorianDate> {
  38     Gregorian() { }
  39
  40     Gregorian(int y, int m, int d, int h = 0, int min = 0, double sec = 0)
  41     {
  42         year = y; month = m; day = d;
  43         hour = h; minute = min; second = sec;
  44     }
  45
  46     Gregorian(CFAbsoluteTime ref)
  47     { static_cast<CFGregorianDate &>(*this) = CFAbsoluteTimeGetGregorianDate(ref, NULL); }
  48
  49     operator CFAbsoluteTime () const
  50     { return CFGregorianDateGetAbsoluteTime(*this, NULL); }
  51 };
  52
  53
  54 //
  55 // The CssmDate PODwrapper
  56 //
  57 CssmDate::CssmDate(const char *y, const char *m, const char *d)
  58 {
  59     assign(years(), 4, y);
  60     assign(months(), 2, m);
  61     assign(days(), 2, d);
  62 }
  63
  64 CssmDate::CssmDate(int y, int m, int d)
  65 {
  66     // internal format is "yyyymmdd" (no null termination)
  67     char str[9];
  68     if (8 != snprintf(str, 9, "%4.4d%2.2d%2.2d", y, m, d))
  69         CssmError::throwMe(CSSM_ERRCODE_UNKNOWN_FORMAT);
  70     memcpy(this, str, 8);
  71 }
  72
  73 int CssmDate::year() const
  74 { return atoi(string(years(), 4).c_str()); }
  75
  76 int CssmDate::month() const
  77 { return atoi(string(months(), 2).c_str()); }
  78
  79 int CssmDate::day() const
  80 { return atoi(string(days(), 2).c_str()); }
  81
  82 // right-adjust fill
  83 void CssmDate::assign(char *dest, int width, const char *src)
  84 {
  85     // pick last width characters of src at most
  86     size_t len = strlen(src);
  87     if (len > width)
  88         CssmError::throwMe(CSSM_ERRCODE_UNKNOWN_FORMAT);
  89     memset(dest, '0', width - len);
  90     memcpy(dest + width - len, src, len);
  91 }
  92
  93
  94 //
  95 // CssmUniformDate core functions
  96 //
  97
  98
  99 //
 100 // Uniform conversions with CFDateRef
 101 //
 102 CssmUniformDate::CssmUniformDate(CFDateRef ref)
 103 {
 104     mTime = CFDateGetAbsoluteTime(ref);
 105 }
 106
 107 CssmUniformDate::operator CFDateRef() const
 108 {
 109     return CFDateCreate(NULL, mTime);
 110 }
 111
 112
 113 //
 114 // Uniform conversions with CssmDates
 115 //
 116 CssmUniformDate::CssmUniformDate(const CssmDate &date)
 117 {
 118     mTime = CFGregorianDateGetAbsoluteTime(Gregorian(date.year(), date.month(), date.day()),
 119         NULL);
 120 }
 121
 122 CssmUniformDate::operator CssmDate () const
 123 {
 124     Gregorian greg(mTime);
 125     return CssmDate(greg.year, greg.month, greg.day);
 126 }
 127
 128
 129 //
 130 // Uniform conversions with CssmData (1999-06-30_15:05:39 form)
 131 //
 132 CssmUniformDate::CssmUniformDate(const CSSM_DATA &inData)
 133 {
 134     const CssmData &data = CssmData::overlay(inData);
 135     if (data.length() != 19)
 136         CssmError::throwMe(CSSM_ERRCODE_UNKNOWN_FORMAT);
 137     setFromString(reinterpret_cast<const char *>(inData.Data), "%ld-%d-%d_%d:%d:%lf", 19);
 138 }
 139
 140 void CssmUniformDate::convertTo(CssmOwnedData &data) const
 141 {
 142     Gregorian greg(mTime);
 143     char str[20];
 144     if (19 != snprintf(str, 20, "%4.4d-%2.2d-%2.2d_%2.2d:%2.2d:%2.2d",
 145         int(greg.year), greg.month, greg.day, greg.hour, greg.minute, int(greg.second)))
 146         CssmError::throwMe(CSSM_ERRCODE_UNKNOWN_FORMAT);
 147     data = CssmData(str, 19);
 148 }
 149
 150
 151 //
 152 // Uniform conversions with CSSM_TIMESTRING (19990630150539 form)
 153 //
 154 CssmUniformDate::CssmUniformDate(const char *src)
 155 {
 156     setFromString(src, "%4ld%2d%2d%2d%2d%2lf", 14);
 157 }
 158
 159 void CssmUniformDate::convertTo(char *dst, size_t length) const
 160 {
 161     if (length < 14)
 162         CssmError::throwMe(CSSMERR_CSSM_BUFFER_TOO_SMALL);
 163     Gregorian greg(mTime);
 164     char str[15];
 165     if (14 != snprintf(str, 15, "%4.4d%2.2d%2.2d%2.2d%2.2d%2.2d",
 166         int(greg.year), greg.month, greg.day, greg.hour, greg.minute, int(greg.second)))
 167         CssmError::throwMe(CSSM_ERRCODE_UNKNOWN_FORMAT);
 168     memcpy(dst, str, length == 14 ? 14 : 15);   // null terminate if there's room
 169 }
 170
 171
 172 //
 173 // Generalized parse-from-string setup
 174 //
 175 void CssmUniformDate::setFromString(const char *src, const char *format, size_t fieldWidth)
 176 {
 177     // use a stack buffer
 178     char str[20];
 179     assert(fieldWidth < sizeof(str));
 180
 181     // make a copy with proper null terminator
 182     memcpy(str, src, fieldWidth);
 183     str[fieldWidth] = '\0';
 184
 185     // parse (with limited checks for bad field formats)
 186     long year;
 187     int month, day, hour, minute;
 188     double second;
 189     if (6 != sscanf(str, format,
 190         &year, &month, &day, &hour, &minute, &second))
 191         CssmError::throwMe(CSSM_ERRCODE_UNKNOWN_FORMAT);
 192
 193     // success
 194     mTime = Gregorian((int)year, month, day, hour, minute, second);
 195 }