/*
* Copyright (c) 2010, 2011, 2012, 2013, 2015, 2016
* Jonathan Schleifer <js@heap.zone>
* Copyright (c) 2011, 2012, Florian Zeitz <florob@babelmonkeys.de>
*
* https://heap.zone/objxmpp/
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice is present in all copies.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#define XMPP_CONNECTION_M
#include <assert.h>
#include <stringprep.h>
#include <idna.h>
#import <ObjOpenSSL/SSLSocket.h>
#import <ObjOpenSSL/SSLInvalidCertificateException.h>
#import <ObjOpenSSL/X509Certificate.h>
#import <ObjFW/OFInvalidArgumentException.h>
#import "XMPPConnection.h"
#import "XMPPCallback.h"
#import "XMPPSRVLookup.h"
#import "XMPPEXTERNALAuth.h"
#import "XMPPSCRAMAuth.h"
#import "XMPPPLAINAuth.h"
#import "XMPPStanza.h"
#import "XMPPJID.h"
#import "XMPPIQ.h"
#import "XMPPMessage.h"
#import "XMPPPresence.h"
#import "XMPPMulticastDelegate.h"
#import "XMPPExceptions.h"
#import "XMPPXMLElementBuilder.h"
#import "namespaces.h"
#import <ObjFW/macros.h>
#define BUFFER_LENGTH 512
OF_ASSUME_NONNULL_BEGIN
@interface XMPPConnection ()
- (void)XMPP_startStream;
- (void)XMPP_handleStream: (OFXMLElement *)element;
- (void)XMPP_handleTLS: (OFXMLElement *)element;
- (void)XMPP_handleSASL: (OFXMLElement *)element;
- (void)XMPP_handleStanza: (OFXMLElement *)element;
- (void)XMPP_sendAuth: (OFString *)authName;
- (void)XMPP_sendResourceBind;
- (void)XMPP_sendStreamError: (OFString *)condition
text: (nullable OFString *)text;
- (void)XMPP_handleIQ: (XMPPIQ *)IQ;
- (void)XMPP_handleMessage: (XMPPMessage *)message;
- (void)XMPP_handlePresence: (XMPPPresence *)presence;
- (void)XMPP_handleFeatures: (OFXMLElement *)element;
- (void)XMPP_handleResourceBindForConnection: (XMPPConnection *)connection
IQ: (XMPPIQ *)IQ;
- (void)XMPP_sendSession;
- (void)XMPP_handleSessionForConnection: (XMPPConnection *)connection
IQ: (XMPPIQ *)IQ;
- (OFString *)XMPP_IDNAToASCII: (OFString *)domain;
- (XMPPMulticastDelegate *)XMPP_delegates;
@end
@interface XMPPConnection_ConnectThread: OFThread
{
OFThread *_sourceThread;
XMPPConnection *_connection;
}
- initWithSourceThread: (OFThread *)sourceThread
connection: (XMPPConnection *)connection;
@end
OF_ASSUME_NONNULL_END
@implementation XMPPConnection_ConnectThread
- initWithSourceThread: (OFThread *)sourceThread
connection: (XMPPConnection *)connection
{
self = [super init];
@try {
_sourceThread = [sourceThread retain];
_connection = [connection retain];
} @catch (id e) {
[self release];
@throw e;
}
return self;
}
- (void)dealloc
{
[_sourceThread release];
[_connection release];
[super dealloc];
}
- (void)didConnect
{
[self join];
[_connection handleConnection];
}
- (id)main
{
void *pool = objc_autoreleasePoolPush();
[_connection connect];
[self performSelector: @selector(didConnect)
onThread: _sourceThread
waitUntilDone: false];
objc_autoreleasePoolPop(pool);
return nil;
}
@end
@implementation XMPPConnection
@synthesize username = _username, resource = _resource, server = _server;
@synthesize domain = _domain, password = _password, language = _language;
@synthesize privateKeyFile = _privateKeyFile;
@synthesize certificateFile = _certificateFile, socket = _socket;
@synthesize encryptionRequired = _encryptionRequired, encrypted = _encrypted;
@synthesize supportsRosterVersioning = _supportsRosterVersioning;
@synthesize supportsStreamManagement = _supportsStreamManagement;
+ (instancetype)connection
{
return [[[self alloc] init] autorelease];
}
- init
{
self = [super init];
@try {
_port = 5222;
_delegates = [[XMPPMulticastDelegate alloc] init];
_callbacks = [[OFMutableDictionary alloc] init];
} @catch (id e) {
[self release];
@throw e;
}
return self;
}
- (void)dealloc
{
[_socket release];
[_parser release];
[_elementBuilder release];
[_username release];
[_password release];
[_privateKeyFile release];
[_certificateFile release];
[_server release];
[_domain release];
[_resource release];
[_JID release];
[_delegates release];
[_callbacks release];
[_authModule release];
[super dealloc];
}
- (void)setUsername: (OFString *)username
{
OFString *old = _username;
if (username != nil) {
char *node;
Stringprep_rc rc;
if ((rc = stringprep_profile([username UTF8String], &node,
"SASLprep", 0)) != STRINGPREP_OK)
@throw [XMPPStringPrepFailedException
exceptionWithConnection: self
profile: @"SASLprep"
string: username];
@try {
_username = [[OFString alloc] initWithUTF8String: node];
} @finally {
free(node);
}
} else
_username = nil;
[old release];
}
- (void)setResource: (OFString *)resource
{
OFString *old = _resource;
if (resource != nil) {
char *res;
Stringprep_rc rc;
if ((rc = stringprep_profile([resource UTF8String], &res,
"Resourceprep", 0)) != STRINGPREP_OK)
@throw [XMPPStringPrepFailedException
exceptionWithConnection: self
profile: @"Resourceprep"
string: resource];
@try {
_resource = [[OFString alloc] initWithUTF8String: res];
} @finally {
free(res);
}
} else
_resource = nil;
[old release];
}
- (void)setServer: (OFString *)server
{
OFString *old = _server;
if (server != nil)
_server = [self XMPP_IDNAToASCII: server];
else
_server = nil;
[old release];
}
- (void)setDomain: (OFString *)domain
{
OFString *oldDomain = _domain;
OFString *oldDomainToASCII = _domainToASCII;
if (domain != nil) {
char *srv;
Stringprep_rc rc;
if ((rc = stringprep_profile([domain UTF8String], &srv,
"Nameprep", 0)) != STRINGPREP_OK)
@throw [XMPPStringPrepFailedException
exceptionWithConnection: self
profile: @"Nameprep"
string: domain];
@try {
_domain = [[OFString alloc] initWithUTF8String: srv];
} @finally {
free(srv);
}
_domainToASCII = [self XMPP_IDNAToASCII: _domain];
} else {
_domain = nil;
_domainToASCII = nil;
}
[oldDomain release];
[oldDomainToASCII release];
}
- (void)setPassword: (OFString *)password
{
OFString *old = _password;
if (password != nil) {
char *pass;
Stringprep_rc rc;
if ((rc = stringprep_profile([password UTF8String], &pass,
"SASLprep", 0)) != STRINGPREP_OK)
@throw [XMPPStringPrepFailedException
exceptionWithConnection: self
profile: @"SASLprep"
string: password];
@try {
_password = [[OFString alloc] initWithUTF8String: pass];
} @finally {
free(pass);
}
} else
_password = nil;
[old release];
}
- (void)connect
{
void *pool = objc_autoreleasePoolPush();
XMPPSRVEntry *candidate = nil;
XMPPSRVLookup *SRVLookup = nil;
OFEnumerator *enumerator;
if (_socket != nil)
@throw [OFAlreadyConnectedException exception];
_socket = [[OFTCPSocket alloc] init];
if (_server)
[_socket connectToHost: _server
port: _port];
else {
@try {
SRVLookup = [XMPPSRVLookup
lookupWithDomain: _domainToASCII];
} @catch (id e) {
}
enumerator = [SRVLookup objectEnumerator];
/* Iterate over SRV records, if any */
if ((candidate = [enumerator nextObject]) != nil) {
do {
@try {
[_socket
connectToHost: [candidate target]
port: [candidate port]];
break;
} @catch (OFAddressTranslationFailedException
*e) {
} @catch (OFConnectionFailedException *e) {
}
} while ((candidate = [enumerator nextObject]) != nil);
} else
/* No SRV records -> fall back to A / AAAA record */
[_socket connectToHost: _domainToASCII
port: _port];
}
[self XMPP_startStream];
objc_autoreleasePoolPop(pool);
}
- (void)handleConnection
{
char *buffer = [self allocMemoryWithSize: BUFFER_LENGTH];
[_socket asyncReadIntoBuffer: buffer
length: BUFFER_LENGTH
target: self
selector: @selector(stream:didReadIntoBuffer:length:
exception:)];
}
- (void)asyncConnectAndHandle
{
void *pool = objc_autoreleasePoolPush();
[[[[XMPPConnection_ConnectThread alloc]
initWithSourceThread: [OFThread currentThread]
connection: self] autorelease] start];
objc_autoreleasePoolPop(pool);
}
- (bool)XMPP_parseBuffer: (const void *)buffer
length: (size_t)length
{
if ([_socket isAtEndOfStream]) {
[_delegates broadcastSelector: @selector(connectionWasClosed:)
withObject: self];
return false;
}
@try {
[_parser parseBuffer: buffer
length: length];
} @catch (OFMalformedXMLException *e) {
[self XMPP_sendStreamError: @"bad-format"
text: nil];
[self close];
return false;
}
return true;
}
- (void)parseBuffer: (const void *)buffer
length: (size_t)length
{
[self XMPP_parseBuffer: buffer
length: length];
[_oldParser release];
[_oldElementBuilder release];
_oldParser = nil;
_oldElementBuilder = nil;
}
- (bool)stream: (OFStream *)stream
didReadIntoBuffer: (char *)buffer
length: (size_t)length
exception: (OFException *)exception
{
if (exception != nil) {
[_delegates broadcastSelector: @selector(connection:
didThrowException:)
withObject: self
withObject: exception];
[self close];
return false;
}
@try {
if (![self XMPP_parseBuffer: buffer
length: length])
return false;
} @catch (id e) {
[_delegates broadcastSelector: @selector(connection:
didThrowException:)
withObject: self
withObject: e];
[self close];
return false;
}
if (_oldParser != nil || _oldElementBuilder != nil) {
[_oldParser release];
[_oldElementBuilder release];
_oldParser = nil;
_oldElementBuilder = nil;
[_socket asyncReadIntoBuffer: buffer
length: BUFFER_LENGTH
target: self
selector: @selector(stream:
didReadIntoBuffer:length:
exception:)];
return false;
}
return true;
}
- (bool)streamOpen
{
return _streamOpen;
}
- (bool)checkCertificateAndGetReason: (OFString **)reason
{
X509Certificate *cert;
OFDictionary *SANs;
bool serviceSpecific = false;
@try {
[_socket verifyPeerCertificate];
} @catch (SSLInvalidCertificateException *e) {
if (reason != NULL)
*reason = [[[e reason] copy] autorelease];
return false;
}
cert = [_socket peerCertificate];
SANs = [cert subjectAlternativeName];
if ([[SANs objectForKey: @"otherName"]
objectForKey: OID_SRVName] != nil ||
[SANs objectForKey: @"dNSName"] != nil ||
[SANs objectForKey: @"uniformResourceIdentifier"] != nil)
serviceSpecific = true;
if ([cert hasSRVNameMatchingDomain: _domainToASCII
service: @"xmpp-client"] ||
[cert hasDNSNameMatchingDomain: _domainToASCII])
return true;
if (!serviceSpecific &&
[cert hasCommonNameMatchingDomain: _domainToASCII])
return true;
return false;
}
- (void)sendStanza: (OFXMLElement *)element
{
[_delegates broadcastSelector: @selector(connection:didSendElement:)
withObject: self
withObject: element];
[_socket writeString: [element XMLString]];
}
- (void)sendIQ: (XMPPIQ *)IQ
callbackTarget: (id)target
selector: (SEL)selector
{
void *pool = objc_autoreleasePoolPush();
XMPPCallback *callback;
OFString *ID, *key;
if ((ID = [IQ ID]) == nil) {
ID = [self generateStanzaID];
[IQ setID: ID];
}
if ((key = [[IQ to] fullJID]) == nil)
key = [_JID bareJID];
if (key == nil) // Only happens for resource bind
key = @"bind";
key = [key stringByAppendingString: ID];
callback = [XMPPCallback callbackWithTarget: target
selector: selector];
[_callbacks setObject: callback
forKey: key];
objc_autoreleasePoolPop(pool);
[self sendStanza: IQ];
}
#ifdef OF_HAVE_BLOCKS
- (void)sendIQ: (XMPPIQ *)IQ
callbackBlock: (xmpp_callback_block_t)block
{
void *pool = objc_autoreleasePoolPush();
XMPPCallback *callback;
OFString *ID, *key;
if ((ID = [IQ ID]) == nil) {
ID = [self generateStanzaID];
[IQ setID: ID];
}
if ((key = [[IQ to] fullJID]) == nil)
key = [_JID bareJID];
if (key == nil) // Connection not yet bound, can't send stanzas
@throw [OFInvalidArgumentException exception];
key = [key stringByAppendingString: ID];
callback = [XMPPCallback callbackWithBlock: block];
[_callbacks setObject: callback
forKey: key];
objc_autoreleasePoolPop(pool);
[self sendStanza: IQ];
}
#endif
- (OFString *)generateStanzaID
{
return [OFString stringWithFormat: @"objxmpp_%u", _lastID++];
}
- (void)parser: (OFXMLParser *)parser
didStartElement: (OFString *)name
prefix: (OFString *)prefix
namespace: (OFString *)NS
attributes: (OFArray *)attributes
{
if (![name isEqual: @"stream"]) {
// No dedicated stream error for this, may not even be XMPP
[self close];
[_socket close];
return;
}
if (![prefix isEqual: @"stream"]) {
[self XMPP_sendStreamError: @"bad-namespace-prefix"
text: nil];
return;
}
if (![NS isEqual: XMPP_NS_STREAM]) {
[self XMPP_sendStreamError: @"invalid-namespace"
text: nil];
return;
}
for (OFXMLAttribute *attribute in attributes) {
if ([[attribute name] isEqual: @"from"] &&
![[attribute stringValue] isEqual: _domain]) {
[self XMPP_sendStreamError: @"invalid-from"
text: nil];
return;
}
if ([[attribute name] isEqual: @"version"] &&
![[attribute stringValue] isEqual: @"1.0"]) {
[self XMPP_sendStreamError: @"unsupported-version"
text: nil];
return;
}
}
[parser setDelegate: _elementBuilder];
}
- (void)elementBuilder: (OFXMLElementBuilder *)builder
didBuildElement: (OFXMLElement *)element
{
/* Ignore whitespace elements */
if ([element name] == nil)
return;
[element setDefaultNamespace: XMPP_NS_CLIENT];
[element setPrefix: @"stream"
forNamespace: XMPP_NS_STREAM];
[_delegates broadcastSelector: @selector(connection:didReceiveElement:)
withObject: self
withObject: element];
if ([[element namespace] isEqual: XMPP_NS_CLIENT])
[self XMPP_handleStanza: element];
if ([[element namespace] isEqual: XMPP_NS_STREAM])
[self XMPP_handleStream: element];
if ([[element namespace] isEqual: XMPP_NS_STARTTLS])
[self XMPP_handleTLS: element];
if ([[element namespace] isEqual: XMPP_NS_SASL])
[self XMPP_handleSASL: element];
}
- (void)elementBuilder: (OFXMLElementBuilder *)builder
didNotExpectCloseTag: (OFString *)name
prefix: (OFString *)prefix
namespace: (OFString *)ns
{
if (![name isEqual: @"stream"] || ![prefix isEqual: @"stream"] ||
![ns isEqual: XMPP_NS_STREAM])
@throw [OFMalformedXMLException exception];
else {
[self close];
}
}
- (void)XMPP_startStream
{
OFString *langString = @"";
/* Make sure we don't get any old events */
[_parser setDelegate: nil];
[_elementBuilder setDelegate: nil];
/*
* We can't release them now, as we are currently inside them. Release
* them the next time the parser returns.
*/
_oldParser = _parser;
_oldElementBuilder = _elementBuilder;
_parser = [[OFXMLParser alloc] init];
[_parser setDelegate: self];
_elementBuilder = [[XMPPXMLElementBuilder alloc] init];
[_elementBuilder setDelegate: self];
if (_language != nil)
langString = [OFString stringWithFormat: @"xml:lang='%@' ",
_language];
[_socket writeFormat: @"<?xml version='1.0'?>\n"
@"<stream:stream to='%@' "
@"xmlns='" XMPP_NS_CLIENT @"' "
@"xmlns:stream='" XMPP_NS_STREAM @"' %@"
@"version='1.0'>", _domain, langString];
_streamOpen = true;
}
- (void)close
{
if (_streamOpen)
[_socket writeString: @"</stream:stream>"];
[_oldParser release];
_oldParser = nil;
[_oldElementBuilder release];
_oldElementBuilder = nil;
[_authModule release];
_authModule = nil;
[_socket release];
_socket = nil;
[_JID release];
_JID = nil;
_streamOpen = _needsSession = _encrypted = false;
_supportsRosterVersioning = _supportsStreamManagement = false;
_lastID = 0;
}
- (void)XMPP_handleStanza: (OFXMLElement *)element
{
if ([[element name] isEqual: @"iq"]) {
[self XMPP_handleIQ: [XMPPIQ stanzaWithElement: element]];
return;
}
if ([[element name] isEqual: @"message"]) {
[self XMPP_handleMessage:
[XMPPMessage stanzaWithElement: element]];
return;
}
if ([[element name] isEqual: @"presence"]) {
[self XMPP_handlePresence:
[XMPPPresence stanzaWithElement: element]];
return;
}
[self XMPP_sendStreamError: @"unsupported-stanza-type"
text: nil];
}
- (void)XMPP_handleStream: (OFXMLElement *)element
{
if ([[element name] isEqual: @"features"]) {
[self XMPP_handleFeatures: element];
return;
}
if ([[element name] isEqual: @"error"]) {
OFString *condition, *reason;
[self close];
[_socket close]; // Remote has already closed his stream
if ([element elementForName: @"bad-format"
namespace: XMPP_NS_XMPP_STREAM])
condition = @"bad-format";
else if ([element elementForName: @"bad-namespace-prefix"
namespace: XMPP_NS_XMPP_STREAM])
condition = @"bad-namespace-prefix";
else if ([element elementForName: @"conflict"
namespace: XMPP_NS_XMPP_STREAM])
condition = @"conflict";
else if ([element elementForName: @"connection-timeout"
namespace: XMPP_NS_XMPP_STREAM])
condition = @"connection-timeout";
else if ([element elementForName: @"host-gone"
namespace: XMPP_NS_XMPP_STREAM])
condition = @"host-gone";
else if ([element elementForName: @"host-unknown"
namespace: XMPP_NS_XMPP_STREAM])
condition = @"host-unknown";
else if ([element elementForName: @"improper-addressing"
namespace: XMPP_NS_XMPP_STREAM])
condition = @"improper-addressing";
else if ([element elementForName: @"internal-server-error"
namespace: XMPP_NS_XMPP_STREAM])
condition = @"internal-server-error";
else if ([element elementForName: @"invalid-from"
namespace: XMPP_NS_XMPP_STREAM])
condition = @"invalid-from";
else if ([element elementForName: @"invalid-namespace"
namespace: XMPP_NS_XMPP_STREAM])
condition = @"invalid-namespace";
else if ([element elementForName: @"invalid-xml"
namespace: XMPP_NS_XMPP_STREAM])
condition = @"invalid-xml";
else if ([element elementForName: @"not-authorized"
namespace: XMPP_NS_XMPP_STREAM])
condition = @"not-authorized";
else if ([element elementForName: @"not-well-formed"
namespace: XMPP_NS_XMPP_STREAM])
condition = @"not-well-formed";
else if ([element elementForName: @"policy-violation"
namespace: XMPP_NS_XMPP_STREAM])
condition = @"policy-violation";
else if ([element elementForName: @"remote-connection-failed"
namespace: XMPP_NS_XMPP_STREAM])
condition = @"remote-connection-failed";
else if ([element elementForName: @"reset"
namespace: XMPP_NS_XMPP_STREAM])
condition = @"reset";
else if ([element elementForName: @"resource-constraint"
namespace: XMPP_NS_XMPP_STREAM])
condition = @"resource-constraint";
else if ([element elementForName: @"restricted-xml"
namespace: XMPP_NS_XMPP_STREAM])
condition = @"restricted-xml";
else if ([element elementForName: @"see-other-host"
namespace: XMPP_NS_XMPP_STREAM])
condition = @"see-other-host";
else if ([element elementForName: @"system-shutdown"
namespace: XMPP_NS_XMPP_STREAM])
condition = @"system-shutdown";
else if ([element elementForName: @"undefined-condition"
namespace: XMPP_NS_XMPP_STREAM])
condition = @"undefined-condition";
else if ([element elementForName: @"unsupported-encoding"
namespace: XMPP_NS_XMPP_STREAM])
condition = @"unsupported-encoding";
else if ([element elementForName: @"unsupported-feature"
namespace: XMPP_NS_XMPP_STREAM])
condition = @"unsupported-feature";
else if ([element elementForName: @"unsupported-stanza-type"
namespace: XMPP_NS_XMPP_STREAM])
condition = @"unsupported-stanza-type";
else if ([element elementForName: @"unsupported-version"
namespace: XMPP_NS_XMPP_STREAM])
condition = @"unsupported-version";
else
condition = @"undefined";
reason = [[element
elementForName: @"text"
namespace: XMPP_NS_XMPP_STREAM] stringValue];
@throw [XMPPStreamErrorException
exceptionWithConnection: self
condition: condition
reason: reason];
return;
}
assert(0);
}
- (void)XMPP_handleTLS: (OFXMLElement *)element
{
if ([[element name] isEqual: @"proceed"]) {
/* FIXME: Catch errors here */
SSLSocket *newSock;
[_delegates broadcastSelector: @selector(
connectionWillUpgradeToTLS:)
withObject: self];
newSock = [[SSLSocket alloc] initWithSocket: _socket];
[newSock setCertificateVerificationEnabled: false];
#if 0
/* FIXME: Not yet implemented by ObjOpenSSL */
[newSock setCertificateFile: _certificateFile];
[newSock setPrivateKeyFile: _privateKeyFile];
[newSock setPrivateKeyPassphrase: _privateKeyPassphrase];
#endif
[newSock startTLSWithExpectedHost: nil];
[_socket release];
_socket = newSock;
_encrypted = true;
[_delegates broadcastSelector: @selector(
connectionDidUpgradeToTLS:)
withObject: self];
/* Stream restart */
[self XMPP_startStream];
return;
}
if ([[element name] isEqual: @"failure"])
/* TODO: Find/create an exception to throw here */
@throw [OFException exception];
assert(0);
}
- (void)XMPP_handleSASL: (OFXMLElement *)element
{
if ([[element name] isEqual: @"challenge"]) {
OFXMLElement *responseTag;
OFData *challenge =
[OFData dataWithBase64EncodedString: [element stringValue]];
OFData *response = [_authModule continueWithData: challenge];
responseTag = [OFXMLElement elementWithName: @"response"
namespace: XMPP_NS_SASL];
if (response) {
if ([response count] == 0)
[responseTag setStringValue: @"="];
else
[responseTag setStringValue:
[response stringByBase64Encoding]];
}
[self sendStanza: responseTag];
return;
}
if ([[element name] isEqual: @"success"]) {
[_authModule continueWithData: [OFData
dataWithBase64EncodedString: [element stringValue]]];
[_delegates broadcastSelector: @selector(
connectionWasAuthenticated:)
withObject: self];
/* Stream restart */
[self XMPP_startStream];
return;
}
if ([[element name] isEqual: @"failure"]) {
of_log(@"Auth failed!");
// FIXME: Do more parsing/handling
@throw [XMPPAuthFailedException
exceptionWithConnection: self
reason: [element XMLString]];
}
assert(0);
}
- (void)XMPP_handleIQ: (XMPPIQ *)IQ
{
bool handled = false;
XMPPCallback *callback;
OFString *key;
if ((key = [[IQ from] fullJID]) == nil)
key = [_JID bareJID];
if (key == nil) // Only happens for resource bind
key = @"bind";
key = [key stringByAppendingString: [IQ ID]];
if ((callback = [_callbacks objectForKey: key])) {
[callback runWithIQ: IQ
connection: self];
[_callbacks removeObjectForKey: key];
return;
}
handled = [_delegates broadcastSelector: @selector(
connection:didReceiveIQ:)
withObject: self
withObject: IQ];
if (!handled && ![[IQ type] isEqual: @"error"] &&
![[IQ type] isEqual: @"result"]) {
[self sendStanza: [IQ errorIQWithType: @"cancel"
condition: @"service-unavailable"]];
}
}
- (void)XMPP_handleMessage: (XMPPMessage *)message
{
[_delegates broadcastSelector: @selector(connection:didReceiveMessage:)
withObject: self
withObject: message];
}
- (void)XMPP_handlePresence: (XMPPPresence *)presence
{
[_delegates broadcastSelector: @selector(connection:didReceivePresence:)
withObject: self
withObject: presence];
}
- (void)XMPP_handleFeatures: (OFXMLElement *)element
{
OFXMLElement *startTLS = [element elementForName: @"starttls"
namespace: XMPP_NS_STARTTLS];
OFXMLElement *bind = [element elementForName: @"bind"
namespace: XMPP_NS_BIND];
OFXMLElement *session = [element elementForName: @"session"
namespace: XMPP_NS_SESSION];
OFXMLElement *mechs = [element elementForName: @"mechanisms"
namespace: XMPP_NS_SASL];
OFMutableSet *mechanisms = [OFMutableSet set];
if (!_encrypted && startTLS != nil) {
[self sendStanza:
[OFXMLElement elementWithName: @"starttls"
namespace: XMPP_NS_STARTTLS]];
return;
}
if (_encryptionRequired && !_encrypted)
/* TODO: Find/create an exception to throw here */
@throw [OFException exception];
if ([element elementForName: @"ver"
namespace: XMPP_NS_ROSTERVER] != nil)
_supportsRosterVersioning = true;
if ([element elementForName: @"sm"
namespace: XMPP_NS_SM] != nil)
_supportsStreamManagement = true;
if (mechs != nil) {
OFEnumerator *enumerator;
OFXMLElement *mech;
enumerator = [[mechs children] objectEnumerator];
while ((mech = [enumerator nextObject]) != nil)
[mechanisms addObject: [mech stringValue]];
if (_privateKeyFile != nil && _certificateFile != nil &&
[mechanisms containsObject: @"EXTERNAL"]) {
_authModule = [[XMPPEXTERNALAuth alloc] init];
[self XMPP_sendAuth: @"EXTERNAL"];
return;
}
if ([mechanisms containsObject: @"SCRAM-SHA-1-PLUS"]) {
_authModule = [[XMPPSCRAMAuth alloc]
initWithAuthcid: _username
password: _password
connection: self
hash: [OFSHA1Hash class]
plusAvailable: true];
[self XMPP_sendAuth: @"SCRAM-SHA-1-PLUS"];
return;
}
if ([mechanisms containsObject: @"SCRAM-SHA-1"]) {
_authModule = [[XMPPSCRAMAuth alloc]
initWithAuthcid: _username
password: _password
connection: self
hash: [OFSHA1Hash class]
plusAvailable: false];
[self XMPP_sendAuth: @"SCRAM-SHA-1"];
return;
}
if ([mechanisms containsObject: @"PLAIN"] && _encrypted) {
_authModule = [[XMPPPLAINAuth alloc]
initWithAuthcid: _username
password: _password];
[self XMPP_sendAuth: @"PLAIN"];
return;
}
assert(0);
}
if (session != nil && [session elementForName: @"optional"
namespace: XMPP_NS_SESSION] == nil)
_needsSession = true;
if (bind != nil) {
[self XMPP_sendResourceBind];
return;
}
assert(0);
}
- (void)XMPP_sendAuth: (OFString *)authName
{
OFXMLElement *authTag;
OFData *initialMessage = [_authModule initialMessage];
authTag = [OFXMLElement elementWithName: @"auth"
namespace: XMPP_NS_SASL];
[authTag addAttributeWithName: @"mechanism"
stringValue: authName];
if (initialMessage) {
if ([initialMessage count] == 0)
[authTag setStringValue: @"="];
else
[authTag setStringValue:
[initialMessage stringByBase64Encoding]];
}
[self sendStanza: authTag];
}
- (void)XMPP_sendResourceBind
{
XMPPIQ *IQ;
OFXMLElement *bind;
IQ = [XMPPIQ IQWithType: @"set"
ID: [self generateStanzaID]];
bind = [OFXMLElement elementWithName: @"bind"
namespace: XMPP_NS_BIND];
if (_resource != nil)
[bind addChild: [OFXMLElement elementWithName: @"resource"
namespace: XMPP_NS_BIND
stringValue: _resource]];
[IQ addChild: bind];
[self sendIQ: IQ
callbackTarget: self
selector: @selector(XMPP_handleResourceBindForConnection:
IQ:)];
}
- (void)XMPP_sendStreamError: (OFString *)condition
text: (OFString *)text
{
OFXMLElement *error = [OFXMLElement
elementWithName: @"error"
namespace: XMPP_NS_STREAM];
[error setPrefix: @"stream"
forNamespace: XMPP_NS_STREAM];
[error addChild: [OFXMLElement elementWithName: condition
namespace: XMPP_NS_XMPP_STREAM]];
if (text)
[error addChild: [OFXMLElement
elementWithName: @"text"
namespace: XMPP_NS_XMPP_STREAM
stringValue: text]];
[_parser setDelegate: nil];
[self sendStanza: error];
[self close];
}
- (void)XMPP_handleResourceBindForConnection: (XMPPConnection *)connection
IQ: (XMPPIQ *)IQ
{
OFXMLElement *bindElement, *JIDElement;
assert([[IQ type] isEqual: @"result"]);
bindElement = [IQ elementForName: @"bind"
namespace: XMPP_NS_BIND];
assert(bindElement != nil);
JIDElement = [bindElement elementForName: @"jid"
namespace: XMPP_NS_BIND];
_JID = [[XMPPJID alloc] initWithString: [JIDElement stringValue]];
if (_needsSession) {
[self XMPP_sendSession];
return;
}
[_delegates broadcastSelector: @selector(connection:wasBoundToJID:)
withObject: self
withObject: _JID];
}
- (void)XMPP_sendSession
{
XMPPIQ *IQ = [XMPPIQ IQWithType: @"set"
ID: [self generateStanzaID]];
[IQ addChild: [OFXMLElement elementWithName: @"session"
namespace: XMPP_NS_SESSION]];
[self sendIQ: IQ
callbackTarget: self
selector: @selector(XMPP_handleSessionForConnection:IQ:)];
}
- (void)XMPP_handleSessionForConnection: (XMPPConnection *)connection
IQ: (XMPPIQ *)IQ
{
if (![[IQ type] isEqual: @"result"])
OF_ENSURE(0);
[_delegates broadcastSelector: @selector(connection:wasBoundToJID:)
withObject: self
withObject: _JID];
}
- (OFString *)XMPP_IDNAToASCII: (OFString *)domain
{
OFString *ret;
char *cDomain;
Idna_rc rc;
if ((rc = idna_to_ascii_8z([domain UTF8String],
&cDomain, IDNA_USE_STD3_ASCII_RULES)) != IDNA_SUCCESS)
@throw [XMPPIDNATranslationFailedException
exceptionWithConnection: self
operation: @"ToASCII"
string: domain];
@try {
ret = [[OFString alloc] initWithUTF8String: cDomain];
} @finally {
free(cDomain);
}
return ret;
}
- (void)setDataStorage: (id <XMPPStorage>)dataStorage
{
if (_streamOpen)
/* FIXME: Find a better exception! */
@throw [OFInvalidArgumentException exception];
_dataStorage = dataStorage;
}
- (id <XMPPStorage>)dataStorage
{
return _dataStorage;
}
- (void)addDelegate: (id <XMPPConnectionDelegate>)delegate
{
[_delegates addDelegate: delegate];
}
- (void)removeDelegate: (id <XMPPConnectionDelegate>)delegate
{
[_delegates removeDelegate: delegate];
}
- (XMPPMulticastDelegate *)XMPP_delegates
{
return _delegates;
}
@end