524 lines
15 KiB
Objective-C
524 lines
15 KiB
Objective-C
/*
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Copyright (c) 2014, Inverse inc.
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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* Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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* Neither the name of the Inverse inc. nor the
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names of its contributors may be used to endorse or promote products
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derived from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
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DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "NSString+ActiveSync.h"
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#include <Foundation/NSArray.h>
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#include <Foundation/NSCalendarDate.h>
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#include <Foundation/NSData.h>
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#include <Foundation/NSDate.h>
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#include <Foundation/NSTimeZone.h>
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#include <SOGo/NSString+Utilities.h>
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#include <SOGo/NSData+Crypto.h>
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#include <NGExtensions/NGBase64Coding.h>
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#include <NGExtensions/NSString+misc.h>
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static NSArray *easCommandCodes = nil;
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static NSArray *easCommandParameters = nil;
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@implementation NSString (ActiveSync)
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//
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// This is a copy from NSString+XMLEscaping.m from SOPE.
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// The difference here is that we use wchar_t instead of unichar.
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// This is needed to get the rigth numeric character reference.
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// e.g. SMILING FACE WITH OPEN MOUTH
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// ok: wchar_t -> 😃 wrong: unichar -> � �
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//
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// We avoir naming it like the one in SOPE since if the ActiveSync
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// bundle is loaded, it'll overwrite the one provided by SOPE.
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//
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- (NSString *) _stringByEscapingXMLStringUsingCharacters {
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register unsigned i, len, j;
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register wchar_t *buf;
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const wchar_t *chars;
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unsigned escapeCount;
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if ([self length] == 0) return @"";
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NSData *data = [self dataUsingEncoding:NSUTF32StringEncoding];
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chars = [data bytes];
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len = [data length]/4;
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/* check for characters to escape ... */
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for (i = 0, escapeCount = 0; i < len; i++) {
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switch (chars[i]) {
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case '&': case '"': case '<': case '>': case '\r':
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escapeCount++;
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break;
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default:
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if (chars[i] < 0x20 || chars[i] > 127)
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escapeCount++;
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break;
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}
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}
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if (escapeCount == 0 ) {
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/* nothing to escape ... */
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return [[self copy] autorelease];
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}
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buf = calloc((len + 5) + (escapeCount * 16), sizeof(wchar_t));
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for (i = 0, j = 0; i < len; i++) {
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switch (chars[i]) {
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/* escape special chars */
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case '\r':
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buf[j] = '&'; j++; buf[j] = '#'; j++; buf[j] = '1'; j++;
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buf[j] = '3'; j++; buf[j] = ';'; j++;
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break;
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case '&':
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buf[j] = '&'; j++; buf[j] = 'a'; j++; buf[j] = 'm'; j++;
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buf[j] = 'p'; j++; buf[j] = ';'; j++;
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break;
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case '"':
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buf[j] = '&'; j++; buf[j] = 'q'; j++; buf[j] = 'u'; j++;
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buf[j] = 'o'; j++; buf[j] = 't'; j++; buf[j] = ';'; j++;
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break;
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case '<':
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buf[j] = '&'; j++; buf[j] = 'l'; j++; buf[j] = 't'; j++;
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buf[j] = ';'; j++;
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break;
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case '>':
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buf[j] = '&'; j++; buf[j] = 'g'; j++; buf[j] = 't'; j++;
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buf[j] = ';'; j++;
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break;
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default:
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/* escape big chars */
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if (chars[i] > 127) {
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unsigned char nbuf[32];
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unsigned int k;
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sprintf((char *)nbuf, "&#%i;", (int)chars[i]);
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for (k = 0; nbuf[k] != '\0'; k++) {
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buf[j] = nbuf[k];
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j++;
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}
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}
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else if (chars[i] == 0x9 || chars[i] == 0xA || chars[i] == 0xD || chars[i] >= 0x20) { // ignore any unsupported control character
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/* nothing to escape */
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buf[j] = chars[i];
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j++;
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}
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break;
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}
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}
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self = [[NSString alloc] initWithBytesNoCopy: buf
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length: (j*sizeof(wchar_t))
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encoding: NSUTF32StringEncoding
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freeWhenDone: YES];
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return [self autorelease];
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}
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- (NSString *) sanitizedServerIdWithType: (SOGoMicrosoftActiveSyncFolderType) folderType
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{
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if (folderType == ActiveSyncEventFolder)
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{
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int len;
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len = [self length];
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if (len > 4 && [self hasSuffix: @".ics"])
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return [self substringToIndex: len-4];
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else
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return [NSString stringWithFormat: @"%@.ics", self];
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}
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return self;
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}
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- (NSString *) activeSyncRepresentationInContext: (WOContext *) context
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{
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return [self _stringByEscapingXMLStringUsingCharacters];
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}
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- (int) activeSyncFolderType
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{
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if ([self isEqualToString: @"inbox"])
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return 2;
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else if ([self isEqualToString: @"draft"])
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return 3;
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else if ([self isEqualToString: @"sent"])
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return 5;
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else if ([self isEqualToString: @"trash"])
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return 4;
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return 12;
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}
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- (NSString *) realCollectionIdWithFolderType: (SOGoMicrosoftActiveSyncFolderType *) folderType;
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{
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NSString *realCollectionId, *v;
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*folderType = ActiveSyncGenericFolder;
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v = [self stringByUnescapingURL];
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if ([v hasPrefix: @"vevent/"])
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{
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realCollectionId = [v substringFromIndex: 7];
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*folderType = ActiveSyncEventFolder;
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}
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else if ([v hasPrefix: @"vtodo/"])
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{
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realCollectionId = [v substringFromIndex: 6];
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*folderType = ActiveSyncTaskFolder;
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}
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else if ([v hasPrefix: @"vcard/"])
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{
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realCollectionId = [v substringFromIndex: 6];
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*folderType = ActiveSyncContactFolder;
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}
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else if ([v hasPrefix: @"mail/"])
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{
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realCollectionId = [[v stringByUnescapingURL] substringFromIndex: 5];
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*folderType = ActiveSyncMailFolder;
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}
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else
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{
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realCollectionId = nil;
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}
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return realCollectionId;
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}
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//
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// 2014-01-16T05:00:00.000Z
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//
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// See http://www.gnustep.org/resources/documentation/Developer/Base/Reference/NSCalendarDate.html#method$NSCalendarDate-initWithString$calendarFormat$ for the format details.
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//
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- (NSCalendarDate *) calendarDate
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{
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NSString *s;
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id o;
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// We force parsing in the GMT timezone. If we don't do that, the date will be parsed
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// in the default timezone.
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s = [NSString stringWithFormat: @"%@ GMT", self];
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o = [NSCalendarDate dateWithString: s calendarFormat: @"%Y%m%dT%H%M%SZ %Z"];
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if (!o)
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o = [NSCalendarDate dateWithString: s calendarFormat: @"%Y-%m-%dT%H:%M:%S.%FZ %Z"];
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return o;
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}
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- (NSString *) _valueForParameter: (NSString *) theParameter
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{
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NSMutableArray *components;
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NSString *s;
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int i;
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components = [NSMutableArray arrayWithArray: [[[self componentsSeparatedByString: @"?"] lastObject] componentsSeparatedByString: @"&"]];
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// We handle BASE64 encoded queryStrings. See http://msdn.microsoft.com/en-us/library/ee160227%28v=exchg.80%29.aspx for details.
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if ([components count] == 1)
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{
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NSString *deviceType, *parameterValue;
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NSData *queryString;
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int cmd_code, deviceid_length, policy_length, devicetype_length, parameter_code, parameter_length, i;
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const char* qs_bytes;
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queryString = [[components objectAtIndex: 0] dataByDecodingBase64];
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if (![queryString length])
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return nil;
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qs_bytes = (const char*)[queryString bytes];
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if (!easCommandCodes)
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{
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easCommandCodes = [NSArray arrayWithObjects:@"Sync", @"SendMail", @"SmartForward", @"SmartReply", @"GetAttachment", @"na", @"na", @"na", @"na",
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@"FolderSync", @"FolderCreate", @"FolderDelete", @"FolderUpdate", @"MoveItems", @"GetItemEstimate", @"MeetingResponse",
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@"Search", @"Settings", @"Ping", @"ItemOperations", @"Provision", @"ResolveRecipients", @"ValidateCert", nil];
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RETAIN(easCommandCodes);
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}
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if (!easCommandParameters)
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{
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easCommandParameters = [NSArray arrayWithObjects:@"AttachmentName", @"CollectionId", @"na", @"ItemId", @"LongId", @"na", @"Occurrence", @"Options", @"User", nil];
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RETAIN(easCommandParameters);
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}
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// Command code, 1 byte, ie.: cmd=
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cmd_code = qs_bytes[1];
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[components addObject: [NSString stringWithFormat: @"cmd=%@", [easCommandCodes objectAtIndex: cmd_code]]];
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// Device ID length and Device ID (variable)
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deviceid_length = qs_bytes[4];
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[components addObject: [NSString stringWithFormat: @"deviceId=%@", [[NSData encodeDataAsHexString: [queryString subdataWithRange: NSMakeRange(5, deviceid_length)]] uppercaseString]]];
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// Device type length and type (variable)
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policy_length = qs_bytes[5+deviceid_length];
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devicetype_length = qs_bytes[5+deviceid_length+1+policy_length];
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deviceType = [[NSString alloc] initWithData: [queryString subdataWithRange: NSMakeRange(5+deviceid_length+1+policy_length+1, devicetype_length)]
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encoding: NSASCIIStringEncoding];
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AUTORELEASE(deviceType);
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[components addObject: [NSString stringWithFormat: @"deviceType=%@", deviceType]];
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// Command Parameters
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i = 5+deviceid_length+1+policy_length+1+devicetype_length;
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while (i < [queryString length])
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{
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parameter_code = qs_bytes[i];
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parameter_length = qs_bytes[i+1];
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parameterValue = [[NSString alloc] initWithData: [queryString subdataWithRange: NSMakeRange(i+1+1, parameter_length)]
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encoding: NSASCIIStringEncoding];
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AUTORELEASE(parameterValue);
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// parameter_code 7 == Options
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// http://msdn.microsoft.com/en-us/library/ee237789(v=exchg.80).aspx
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if (parameter_code == 7)
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[components addObject: [NSString stringWithFormat: @"%@=%@", [easCommandParameters objectAtIndex: parameter_code],
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([parameterValue isEqualToString: @"\001"]) ? @"SaveInSent" : @"AcceptMultiPart"]];
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else
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[components addObject: [NSString stringWithFormat: @"%@=%@", [easCommandParameters objectAtIndex: parameter_code], parameterValue]];
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i = i + 1 + 1 + parameter_length;
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}
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}
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for (i = 0; i < [components count]; i++)
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{
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s = [components objectAtIndex: i];
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if ([[s uppercaseString] hasPrefix: theParameter])
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return [s substringFromIndex: [theParameter length]];
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}
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return nil;
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}
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//
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// This method extracts the "DeviceId" from a URI:
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//
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// /SOGo/Microsoft-Server-ActiveSync?Cmd=FolderSync&User=sogo10&DeviceId=SEC17CD1A3E9E3F2&DeviceType=SAMSUNGSGHI317M
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//
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- (NSString *) deviceId
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{
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NSString *s;
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s = [self _valueForParameter: @"DEVICEID="];
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if (!s)
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s = @"Unknown";
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return s;
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}
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//
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// This method extracts the "DeviceType" from a URI:
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//
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// /SOGo/Microsoft-Server-ActiveSync?Cmd=FolderSync&User=sogo10&DeviceId=SEC17CD1A3E9E3F2&DeviceType=SAMSUNGSGHI317M
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//
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- (NSString *) deviceType
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{
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NSString *s;
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s = [self _valueForParameter: @"DEVICETYPE="];
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if (!s)
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s = @"Unknown";
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return s;
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}
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// This method extracts the "AttachmentName" from a URI:
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//
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// /SOGo/Microsoft-Server-ActiveSync?Cmd=GetAttachment&User=sogo&DeviceId=HTCa04b4932597acd3f2dc1a918b9728&DeviceType=htcvision&AttachmentName=mail/TestFldr/8/2
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//
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- (NSString *) attachmentName
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{
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NSString *s;
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s = [self _valueForParameter: @"ATTACHMENTNAME="];
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if (!s)
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s = @"Unknown";
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return s;
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}
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//
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//
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//
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- (NSString *) command
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{
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NSString *s;
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s = [self _valueForParameter: @"CMD="];
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if (!s)
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s = @"Unknown";
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return s;
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}
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- (NSString *) itemid
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{
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NSString *s;
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s = [self _valueForParameter: @"ITEMID="];
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if (!s)
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s = @"Unknown";
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return s;
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}
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- (NSString *) collectionid
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{
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NSString *s;
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s = [self _valueForParameter: @"COLLECTIONID="];
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if (!s)
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s = @"Unknown";
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return s;
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}
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- (BOOL) acceptsMultiPart
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{
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NSString *s;
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s = [self _valueForParameter: @"OPTIONS="];
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if (s && [s rangeOfString: @"AcceptMultiPart" options: NSCaseInsensitiveSearch].location != NSNotFound)
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return YES;
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return NO;
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}
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//
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// FIXME: combine with our OpenChange code.
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//
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- (char) _decodeHexByte: (char) byteChar
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{
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char newByte;
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if (byteChar >= 48 && byteChar <= 57)
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newByte = (uint8_t) byteChar - 48;
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else if (byteChar >= 65 && byteChar <= 70)
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newByte = (uint8_t) byteChar - 55;
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else if (byteChar >= 97 && byteChar <= 102)
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newByte = (uint8_t) byteChar - 87;
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else
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newByte = -1;
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return newByte;
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}
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//
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// FIXME: combine with our OpenChange code.
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//
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- (BOOL) _decodeHexByte: (uint8_t *) byte
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atPos: (NSUInteger) pos
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{
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BOOL error = NO;
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char newByte;
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unichar byteChar;
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byteChar = [self characterAtIndex: pos];
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if (byteChar < 256)
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{
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newByte = [self _decodeHexByte: (char) byteChar];
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if (newByte == -1)
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error = YES;
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else
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*byte = newByte;
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}
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else
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error = YES;
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return error;
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}
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//
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// FIXME: combine with our OpenChange code.
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//
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- (BOOL) _decodeHexPair: (uint8_t *) byte
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atPos: (NSUInteger) pos
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{
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BOOL error;
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uint8_t lowValue, highValue;
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error = [self _decodeHexByte: &highValue atPos: pos];
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if (!error)
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{
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error = [self _decodeHexByte: &lowValue atPos: pos + 1];
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if (!error)
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*byte = highValue << 4 | lowValue;
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}
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return error;
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}
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//
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// FIXME: combine with our OpenChange code.
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//
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- (NSData *) convertHexStringToBytes
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{
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NSUInteger count, strLen, bytesLen;
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uint8_t *bytes, *currentByte;
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NSData *decoded = nil;
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BOOL error = NO;
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strLen = [self length];
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if ((strLen % 2) == 0)
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{
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bytesLen = strLen / 2;
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bytes = NSZoneCalloc (NULL, bytesLen, sizeof (uint8_t));
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currentByte = bytes;
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for (count = 0; !error && count < strLen; count += 2)
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{
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error = [self _decodeHexPair: currentByte atPos: count];
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currentByte++;
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}
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if (error)
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NSZoneFree (NULL, bytes);
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else
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decoded = [NSData dataWithBytesNoCopy: bytes
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length: bytesLen
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freeWhenDone: YES];
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}
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return decoded;
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}
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@end
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