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EDSecureSMTPStream.m
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EDSecureSMTPStream.m
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//---------------------------------------------------------------------------------------
// EDSMTPSStream.m created by erik on Wed 08-Oct-2008
// $Id$
//
// Copyright (c) 2008 by Erik Doernenburg. All rights reserved.
//
// Permission to use, copy, modify and distribute this software and its documentation
// is hereby granted, provided that both the copyright notice and this permission
// notice appear in all copies of the software, derivative works or modified versions,
// and any portions thereof, and that both notices appear in supporting documentation,
// and that credit is given to Erik Doernenburg in all documents and publicity
// pertaining to direct or indirect use of this code or its derivatives.
//
// THIS IS EXPERIMENTAL SOFTWARE AND IT IS KNOWN TO HAVE BUGS, SOME OF WHICH MAY HAVE
// SERIOUS CONSEQUENCES. THE COPYRIGHT HOLDER ALLOWS FREE USE OF THIS SOFTWARE IN ITS
// "AS IS" CONDITION. THE COPYRIGHT HOLDER DISCLAIMS ANY LIABILITY OF ANY KIND FOR ANY
// DAMAGES WHATSOEVER RESULTING DIRECTLY OR INDIRECTLY FROM THE USE OF THIS SOFTWARE
// OR OF ANY DERIVATIVE WORK.
//---------------------------------------------------------------------------------------
#import "EDSecureSMTPStream.h"
#import "OPSSLSocket.h"
//---------------------------------------------------------------------------------------
@implementation EDSecureSMTPStream
//---------------------------------------------------------------------------------------
//---------------------------------------------------------------------------------------
// FACTORY
//---------------------------------------------------------------------------------------
+ (id)streamConnectedToHost:(NSHost *)host port:(unsigned short)port
{
OPSSLSocket *socket;
socket = [OPSSLSocket socket];
[socket connectToHost:host port:port];
return [self streamWithFileHandle:socket];
}
//---------------------------------------------------------------------------------------
// ACCESSOR METHODS
//---------------------------------------------------------------------------------------
- (OPSSLSocket *)socket
{
return (OPSSLSocket *)[self fileHandle];
}
//---------------------------------------------------------------------------------------
// OVERRIDES
//---------------------------------------------------------------------------------------
- (void)handleHELOResponse250:(NSArray *)response
{
if(![[self socket] isEncrypted])
{
state = InitFailed;
[NSException raise:EDSMTPException format:@"Failed to initialize STMP connection; requested TLS but server does not support it."];
}
[super handleHELOResponse250:response];
}
- (void)handleEHLOResponse250:(NSArray *)response
{
NSString *responseCode;
[super handleEHLOResponse250:response];
if([[self socket] isEncrypted])
return;
if([self supportsTLS] == false)
{
state = InitFailed;
[NSException raise:EDSMTPException format:@"Failed to initialize STMP connection; requested TLS but server does not support it."];
}
[self writeFormat:@"STARTTLS\r\n"];
response = [self readResponse];
responseCode = [[response objectAtIndex:0] substringToIndex:3];
if([responseCode isEqualToString:@"220"])
{
[[self socket] negotiateEncryption];
[self resetCapabilities];
state = ShouldSayEHLO;
}
else
{
state = InitFailed;
[NSException raise:EDSMTPException format:@"Failed to initialize STMP connection; read \"%@\"", [response componentsJoinedByString:@" "]];
}
}
//---------------------------------------------------------------------------------------
// SMTP EXTENSIONS
//---------------------------------------------------------------------------------------
- (BOOL)supportsTLS
{
return [capabilities objectForKey:@"STARTTLS"] != nil;
}
//---------------------------------------------------------------------------------------
@end
//---------------------------------------------------------------------------------------