OSX/libsecurity_keychain/lib/cssmdatetime.cpp

   1 /*
   2  * Copyright (c) 2000-2004,2011-2014 Apple Inc. All Rights Reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   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,
  16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  18  * Please see the License for the specific language governing rights and
  19  * limitations under the License.
  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22  *
  23  * cssmdatetime.cpp -- CSSM date and time utilities for the Mac
  24  */
  25
  26 #ifdef __MWERKS__
  27 #define _CPP_CSSM_DATE_TIME_UTILS
  28 #endif
  29
  30 #include "cssmdatetime.h"
  31
  32 #include <string.h>
  33 #include <stdio.h>
  34 #include <security_utilities/errors.h>
  35 #include <CoreFoundation/CFDate.h>
  36 #include <CoreFoundation/CFTimeZone.h>
  37 #include <ctype.h>
  38 #include <stdlib.h>
  39 #include <Security/SecBase.h>
  40 namespace Security
  41 {
  42
  43 namespace CSSMDateTimeUtils
  44 {
  45
  46 #define UTC_TIME_NOSEC_LEN                      11
  47 #define UTC_TIME_STRLEN                         13
  48 #define GENERALIZED_TIME_STRLEN         15
  49 #define LOCALIZED_UTC_TIME_STRLEN       17
  50 #define LOCALIZED_TIME_STRLEN           19
  51 #define MAX_TIME_STR_LEN                        30
  52
  53
  54 void
  55 GetCurrentMacLongDateTime(sint64 &outMacDate)
  56 {
  57         CFTimeZoneRef timeZone = CFTimeZoneCopyDefault();
  58         CFAbsoluteTime absTime = CFAbsoluteTimeGetCurrent();
  59         absTime += CFTimeZoneGetSecondsFromGMT(timeZone, absTime);
  60         CFRelease(timeZone);
  61         outMacDate = sint64(double(absTime + kCFAbsoluteTimeIntervalSince1904));
  62 }
  63
  64 void
  65 TimeStringToMacSeconds (const CSSM_DATA &inUTCTime, uint32 &ioMacDate)
  66 {
  67     sint64 ldt;
  68     TimeStringToMacLongDateTime(inUTCTime, ldt);
  69     ioMacDate = uint32(ldt);
  70 }
  71
  72 /*
  73  * Given a CSSM_DATA containing either a UTC-style or "generalized time"
  74  * time string, convert to 32-bit Mac time in seconds.
  75  * Returns nonzero on error.
  76  */
  77 void
  78 TimeStringToMacLongDateTime (const CSSM_DATA &inUTCTime, sint64 &outMacDate)
  79 {
  80         char            szTemp[5];
  81         size_t          len;
  82         int             isUtc;
  83         sint32          x;
  84         sint32          i;
  85         char            *cp;
  86
  87         CFGregorianDate date;
  88         ::memset( &date, 0, sizeof(date) );
  89
  90         if ((inUTCTime.Data == NULL) || (inUTCTime.Length == 0))
  91     {
  92         MacOSError::throwMe(errSecParam);
  93         }
  94
  95         /* tolerate NULL terminated or not */
  96         len = inUTCTime.Length;
  97         if (inUTCTime.Data[len - 1] == '\0')
  98                 len--;
  99
 100         switch(len)
 101     {
 102                 case UTC_TIME_STRLEN:                   // 2-digit year, not Y2K compliant
 103                         isUtc = 1;
 104                         break;
 105                 case GENERALIZED_TIME_STRLEN:   // 4-digit year
 106                         isUtc = 0;
 107                         break;
 108                 default:                                                // unknown format
 109             MacOSError::throwMe(errSecParam);
 110         }
 111
 112         cp = (char *)inUTCTime.Data;
 113
 114         /* check that all characters except last are digits */
 115     for(i=0; i<(sint32)(len - 1); i++) {
 116                 if ( !(isdigit(cp[i])) ) {
 117             MacOSError::throwMe(errSecParam);
 118                 }
 119         }
 120
 121         /* check last character is a 'Z' */
 122         if(cp[len - 1] != 'Z' ) {
 123         MacOSError::throwMe(errSecParam);
 124         }
 125
 126         /* YEAR */
 127         szTemp[0] = *cp++;
 128         szTemp[1] = *cp++;
 129         if(!isUtc) {
 130                 /* two more digits */
 131                 szTemp[2] = *cp++;
 132                 szTemp[3] = *cp++;
 133                 szTemp[4] = '\0';
 134         }
 135         else {
 136                 szTemp[2] = '\0';
 137         }
 138         x = atoi( szTemp );
 139         if(isUtc) {
 140                 /*
 141                  * 2-digit year.
 142                  *   0  <= year <= 50 : assume century 21
 143                  *   50 <  year <  70 : illegal per PKIX
 144                  *   70 <  year <= 99 : assume century 20
 145                  */
 146                 if(x <= 50) {
 147                         x += 100;
 148                 }
 149                 else if(x < 70) {
 150             MacOSError::throwMe(errSecParam);
 151                 }
 152                 /* else century 20, OK */
 153
 154                 /* bug fix... we need to end up with a 4-digit year! */
 155                 x += 1900;
 156         }
 157         /* by definition - tm_year is year - 1900 */
 158         //tmp->tm_year = x - 1900;
 159         date.year = x;
 160
 161         /* MONTH */
 162         szTemp[0] = *cp++;
 163         szTemp[1] = *cp++;
 164         szTemp[2] = '\0';
 165         x = atoi( szTemp );
 166         /* in the string, months are from 1 to 12 */
 167         if((x > 12) || (x <= 0)) {
 168         MacOSError::throwMe(errSecParam);
 169         }
 170         /* in a tm, 0 to 11 */
 171         //tmp->tm_mon = x - 1;
 172         date.month = x;
 173
 174         /* DAY */
 175         szTemp[0] = *cp++;
 176         szTemp[1] = *cp++;
 177         szTemp[2] = '\0';
 178         x = atoi( szTemp );
 179         /* 1..31 in both formats */
 180         if((x > 31) || (x <= 0)) {
 181         MacOSError::throwMe(errSecParam);
 182         }
 183         //tmp->tm_mday = x;
 184         date.day = x;
 185
 186         /* HOUR */
 187         szTemp[0] = *cp++;
 188         szTemp[1] = *cp++;
 189         szTemp[2] = '\0';
 190         x = atoi( szTemp );
 191         if((x > 23) || (x < 0)) {
 192         MacOSError::throwMe(errSecParam);
 193         }
 194         //tmp->tm_hour = x;
 195         date.hour = x;
 196
 197         /* MINUTE */
 198         szTemp[0] = *cp++;
 199         szTemp[1] = *cp++;
 200         szTemp[2] = '\0';
 201         x = atoi( szTemp );
 202         if((x > 59) || (x < 0)) {
 203         MacOSError::throwMe(errSecParam);
 204         }
 205         //tmp->tm_min = x;
 206         date.minute = x;
 207
 208         /* SECOND */
 209         szTemp[0] = *cp++;
 210         szTemp[1] = *cp++;
 211         szTemp[2] = '\0';
 212         x = atoi( szTemp );
 213         if((x > 59) || (x < 0)) {
 214         MacOSError::throwMe(errSecParam);
 215         }
 216         //tmp->tm_sec = x;
 217         date.second = x;
 218
 219         CFTimeZoneRef timeZone = CFTimeZoneCreateWithTimeIntervalFromGMT(NULL, 0);
 220         CFAbsoluteTime absTime = CFGregorianDateGetAbsoluteTime(date, timeZone);
 221         CFRelease(timeZone);
 222
 223         // Adjust abstime to local timezone
 224         timeZone = CFTimeZoneCopyDefault();
 225         absTime += CFTimeZoneGetSecondsFromGMT(timeZone, absTime);
 226         CFRelease(timeZone);
 227
 228         outMacDate = sint64(double(absTime + kCFAbsoluteTimeIntervalSince1904));
 229 }
 230
 231 void MacSecondsToTimeString(uint32 inMacDate, uint32 inLength, void *outData)
 232 {
 233     sint64 ldt = sint64(uint64(inMacDate));
 234     MacLongDateTimeToTimeString(ldt, inLength, outData);
 235 }
 236
 237 void MacLongDateTimeToTimeString(const sint64 &inMacDate,
 238                                         uint32 inLength, void *outData)
 239 {
 240         // @@@ this code is close, but on the fringe case of a daylight savings time it will be off for a little while
 241         CFAbsoluteTime absTime = inMacDate - kCFAbsoluteTimeIntervalSince1904;
 242
 243         // Remove local timezone component from absTime
 244         CFTimeZoneRef timeZone = CFTimeZoneCopyDefault();
 245         absTime -= CFTimeZoneGetSecondsFromGMT(timeZone, absTime);
 246         CFRelease(timeZone);
 247
 248         timeZone = CFTimeZoneCreateWithTimeIntervalFromGMT(NULL, 0);
 249         CFGregorianDate date = CFAbsoluteTimeGetGregorianDate(absTime, timeZone);
 250         CFRelease(timeZone);
 251
 252     if (inLength == 16)
 253     {
 254         sprintf((char *)(outData), "%04d%02d%02d%02d%02d%02dZ",
 255                 int(date.year % 10000), date.month, date.day,
 256                 date.hour, date.minute, int(date.second));
 257     }
 258     else if (inLength == 14)
 259     {
 260                 /* UTC - 2 year digits - code which parses this assumes that
 261                  * (2-digit) years between 0 and 49 are in century 21 */
 262         sprintf((char *)(outData), "%02d%02d%02d%02d%02d%02dZ",
 263                 int(date.year % 100), date.month, date.day,
 264                 date.hour, date.minute, int(date.second));
 265     }
 266     else
 267         MacOSError::throwMe(errSecParam);
 268 }
 269
 270 void
 271 CFDateToCssmDate(CFDateRef date, char *outCssmDate)
 272 {
 273         CFTimeZoneRef timeZone = CFTimeZoneCreateWithTimeIntervalFromGMT(NULL, 0);
 274         CFGregorianDate gd = CFAbsoluteTimeGetGregorianDate(CFDateGetAbsoluteTime(date), timeZone);
 275         sprintf(outCssmDate, "%04d%02d%02d%02d%02d%02dZ", (int)gd.year, gd.month, gd.day, gd.hour, gd.minute, (unsigned int)gd.second);
 276         CFRelease(timeZone);
 277 }
 278
 279 void
 280 CssmDateToCFDate(const char *cssmDate, CFDateRef *outCFDate)
 281 {
 282         CFTimeZoneRef timeZone = CFTimeZoneCreateWithTimeIntervalFromGMT(NULL, 0);
 283         CFGregorianDate gd;
 284         unsigned int year, month, day, hour, minute, second;
 285         sscanf(cssmDate, "%4d%2d%2d%2d%2d%2d", &year, &month, &day, &hour, &minute, &second);
 286         gd.year = year;
 287         gd.month = month;
 288         gd.day = day;
 289         gd.hour = hour;
 290         gd.minute = minute;
 291         gd.second = second;
 292         *outCFDate = CFDateCreate(NULL, CFGregorianDateGetAbsoluteTime(gd, timeZone));
 293         CFRelease(timeZone);
 294 }
 295
 296 int
 297 CssmDateStringToCFDate(const char *cssmDate, unsigned int len, CFDateRef *outCFDate)
 298 {
 299         CFTimeZoneRef timeZone;
 300         CFGregorianDate gd;
 301         CFTimeInterval ti=0;
 302         char szTemp[5];
 303         unsigned isUtc=0, isLocal=0, i;
 304         int x;
 305         unsigned noSeconds=0;
 306         char *cp;
 307
 308         if((cssmDate == NULL) || (len == 0) || (outCFDate == NULL))
 309         return 1;
 310
 311         /* tolerate NULL terminated or not */
 312         if(cssmDate[len - 1] == '\0')
 313                 len--;
 314
 315         switch(len) {
 316                 case UTC_TIME_NOSEC_LEN:                // 2-digit year, no seconds, not y2K compliant
 317                         isUtc = 1;
 318                         noSeconds = 1;
 319                         break;
 320                 case UTC_TIME_STRLEN:                   // 2-digit year, not Y2K compliant
 321                         isUtc = 1;
 322                         break;
 323                 case GENERALIZED_TIME_STRLEN:   // 4-digit year
 324                         //isUtc = 0;
 325                         break;
 326                 case LOCALIZED_UTC_TIME_STRLEN: // "YYMMDDhhmmssThhmm" (where T=[+,-])
 327                         isUtc = 1;
 328                         // deliberate fallthrough
 329                 case LOCALIZED_TIME_STRLEN:             // "YYYYMMDDhhmmssThhmm" (where T=[+,-])
 330                         isLocal = 1;
 331                         break;
 332                 default:                                                // unknown format
 333                         return 1;
 334         }
 335
 336         cp = (char *)cssmDate;
 337
 338         /* check that all characters except last (or timezone indicator, if localized) are digits */
 339         for(i=0; i<(len - 1); i++) {
 340                 if ( !(isdigit(cp[i])) )
 341                         if ( !isLocal || !(cp[i]=='+' || cp[i]=='-') )
 342                                 return 1;
 343         }
 344         /* check last character is a 'Z', unless localized */
 345         if(!isLocal && cp[len - 1] != 'Z' )     {
 346                 return 1;
 347         }
 348
 349         /* YEAR */
 350         szTemp[0] = *cp++;
 351         szTemp[1] = *cp++;
 352         if(!isUtc) {
 353                 /* two more digits */
 354                 szTemp[2] = *cp++;
 355                 szTemp[3] = *cp++;
 356                 szTemp[4] = '\0';
 357         }
 358         else {
 359                 szTemp[2] = '\0';
 360         }
 361         x = atoi( szTemp );
 362         if(isUtc) {
 363                 /*
 364                  * 2-digit year.
 365                  *   0  <= year <  50 : assume century 21
 366                  *   50 <= year <  70 : illegal per PKIX
 367                  *   70 <  year <= 99 : assume century 20
 368                  */
 369                 if(x < 50) {
 370                         x += 2000;
 371                 }
 372                 else if(x < 70) {
 373                         return 1;
 374                 }
 375                 else {
 376                         /* century 20 */
 377                         x += 1900;
 378                 }
 379         }
 380         gd.year = x;
 381
 382         /* MONTH */
 383         szTemp[0] = *cp++;
 384         szTemp[1] = *cp++;
 385         szTemp[2] = '\0';
 386         x = atoi( szTemp );
 387         /* in the string, months are from 1 to 12 */
 388         if((x > 12) || (x <= 0)) {
 389         return 1;
 390         }
 391         gd.month = x;
 392
 393         /* DAY */
 394         szTemp[0] = *cp++;
 395         szTemp[1] = *cp++;
 396         szTemp[2] = '\0';
 397         x = atoi( szTemp );
 398         /* 1..31 in both formats */
 399         if((x > 31) || (x <= 0)) {
 400                 return 1;
 401         }
 402         gd.day = x;
 403
 404         /* HOUR */
 405         szTemp[0] = *cp++;
 406         szTemp[1] = *cp++;
 407         szTemp[2] = '\0';
 408         x = atoi( szTemp );
 409         if((x > 23) || (x < 0)) {
 410                 return 1;
 411         }
 412         gd.hour = x;
 413
 414         /* MINUTE */
 415         szTemp[0] = *cp++;
 416         szTemp[1] = *cp++;
 417         szTemp[2] = '\0';
 418         x = atoi( szTemp );
 419         if((x > 59) || (x < 0)) {
 420                 return 1;
 421         }
 422         gd.minute = x;
 423
 424         /* SECOND */
 425         if(noSeconds) {
 426                 gd.second = 0;
 427         }
 428         else {
 429                 szTemp[0] = *cp++;
 430                 szTemp[1] = *cp++;
 431                 szTemp[2] = '\0';
 432                 x = atoi( szTemp );
 433                 if((x > 59) || (x < 0)) {
 434                         return 1;
 435                 }
 436                 gd.second = x;
 437         }
 438
 439         if (isLocal) {
 440                 /* ZONE INDICATOR */
 441                 ti = (*cp++ == '+') ? 1 : -1;
 442                 /* ZONE HH OFFSET */
 443                 szTemp[0] = *cp++;
 444                 szTemp[1] = *cp++;
 445                 szTemp[2] = '\0';
 446                 x = atoi( szTemp ) * 60 * 60;
 447                 ti *= x;
 448                 /* ZONE MM OFFSET */
 449                 szTemp[0] = *cp++;
 450                 szTemp[1] = *cp++;
 451                 szTemp[2] = '\0';
 452                 x = atoi( szTemp ) * 60;
 453                 ti += ((ti < 0) ? (x*-1) : x);
 454         }
 455         timeZone = CFTimeZoneCreateWithTimeIntervalFromGMT(NULL, ti);
 456         if (!timeZone) return 1;
 457         *outCFDate = CFDateCreate(NULL, CFGregorianDateGetAbsoluteTime(gd, timeZone));
 458         CFRelease(timeZone);
 459
 460         return 0;
 461 }
 462
 463 }; // end namespace CSSMDateTimeUtils
 464
 465 } // end namespace Security