186 lines
5 KiB
Objective-C
186 lines
5 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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#import "NSData+ActiveSync.h"
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#import <Foundation/NSProcessInfo.h>
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#import <Foundation/NSString.h>
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#import <SOGo/SOGoSystemDefaults.h>
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#import <NGExtensions/NGBase64Coding.h>
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#import <NGExtensions/NSObject+Logs.h>
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#include <wbxml/wbxml.h>
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#include <wbxml/wbxml_conv.h>
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#include <wbxml/wbxml_errors.h>
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#define WBXMLDEBUG 0
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@implementation NSData (ActiveSync)
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- (void) _dumpToFile
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{
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BOOL debugOn;
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debugOn = [[SOGoSystemDefaults sharedSystemDefaults] easDebugEnabled];
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if (debugOn)
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{
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NSString *path;
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path = [NSString stringWithFormat: @"/tmp/%@.data", [[NSProcessInfo processInfo] globallyUniqueString]];
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[self writeToFile: path atomically: YES];
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[self errorWithFormat: @"Original data written to: %@", path];
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}
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}
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//
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// Encodes the data in base64 and strip newline characters
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//
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- (NSString *) activeSyncRepresentationInContext: (WOContext *) context
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{
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NSString *tmp, *s;
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unichar *buf, *start, c;
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int len, i, j;
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tmp = [self stringByEncodingBase64] ;
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len = [tmp length];
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start = buf = (unichar *)malloc(len*sizeof(unichar));
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[tmp getCharacters: buf range: NSMakeRange(0, len)];
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for (i = 0, j = 0; i < len; i++)
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{
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c = *buf;
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if (!(c == 0xA))
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{
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*(start+j) = c;
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j++;
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}
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buf++;
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}
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s = [[NSString alloc] initWithCharactersNoCopy: start length: j freeWhenDone: YES];
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return AUTORELEASE(s);
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}
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- (NSData *) wbxml2xml
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{
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WBXMLGenXMLParams params;
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NSData *data;
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unsigned int wbxml_len, xml_len, ret;
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unsigned char *wbxml, *xml;
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wbxml = (unsigned char*)[self bytes];
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wbxml_len = [self length];
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xml = NULL;
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xml_len = 0;
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params.lang = WBXML_LANG_ACTIVESYNC;
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params.gen_type = WBXML_GEN_XML_INDENT;
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params.indent = 1;
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params.keep_ignorable_ws = FALSE;
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ret = wbxml_conv_wbxml2xml_withlen(wbxml, wbxml_len, &xml, &xml_len, ¶ms);
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if (ret != WBXML_OK)
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{
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[self errorWithFormat: @"wbxml2xmlFromContent: failed: %s\n", wbxml_errors_string(ret)];
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[self _dumpToFile];
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return nil;
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}
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data = [NSData dataWithBytesNoCopy: xml length: xml_len freeWhenDone: YES];
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#if WBXMLDEBUG
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[data writeToFile: @"/tmp/protocol.decoded" atomically: YES];
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#endif
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return data;
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}
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- (NSData *) xml2wbxml
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{
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WBXMLConvXML2WBXML *conv;
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NSData *data;
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unsigned int wbxml_len, xml_len, ret;
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unsigned char *wbxml, *xml;
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xml = (unsigned char*)[self bytes];
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xml_len = [self length];
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wbxml = NULL;
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wbxml_len = 0;
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conv = NULL;
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ret = wbxml_conv_xml2wbxml_create(&conv);
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if (ret != WBXML_OK)
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{
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[self logWithFormat: @"xml2wbxmlFromContent: failed: %s\n", wbxml_errors_string(ret)];
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[self _dumpToFile];
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return nil;
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}
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wbxml_conv_xml2wbxml_enable_preserve_whitespaces(conv);
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// From libwbxml's changelog in v0.11.0: "The public ID is set to unknown and the DTD is not included. This is required for Microsoft ActiveSync."
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wbxml_conv_xml2wbxml_disable_public_id(conv);
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wbxml_conv_xml2wbxml_disable_string_table(conv);
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ret = wbxml_conv_xml2wbxml_run(conv, xml, xml_len, &wbxml, &wbxml_len);
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if (ret != WBXML_OK)
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{
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[self errorWithFormat: @"xml2wbxmlFromContent: failed: %s\n", wbxml_errors_string(ret)];
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[self _dumpToFile];
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free(wbxml);
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wbxml_conv_xml2wbxml_destroy(conv);
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return nil;
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}
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data = [NSData dataWithBytesNoCopy: wbxml length: wbxml_len freeWhenDone: YES];
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#if WBXMLDEBUG
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[data writeToFile: @"/tmp/protocol.encoded" atomically: YES];
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#endif
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wbxml_conv_xml2wbxml_destroy(conv);
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return data;
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}
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@end
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