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/*
*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*
*/
#include "qpid/broker/amqp/Sasl.h"
#include "qpid/broker/Broker.h"
#include "qpid/log/Statement.h"
#include "qpid/framing/ProtocolInitiation.h"
#include "qpid/sys/OutputControl.h"
#include "qpid/sys/SecurityLayer.h"
#include <boost/format.hpp>
#include <vector>
namespace qpid {
namespace broker {
namespace amqp {
Sasl::Sasl(qpid::sys::OutputControl& o, const std::string& id, qpid::broker::Broker& broker, std::auto_ptr<qpid::SaslServer> auth)
: qpid::amqp::SaslServer(id), out(o), connection(out, id, broker, true),
authenticator(auth),
state(INCOMPLETE), writeHeader(true), haveOutput(true)
{
out.activateOutput();
mechanisms(authenticator->getMechanisms());
}
Sasl::~Sasl() {}
size_t Sasl::decode(const char* buffer, size_t size)
{
if (state == AUTHENTICATED) {
if (securityLayer.get()) return securityLayer->decode(buffer, size);
else return connection.decode(buffer, size);
} else if (state == INCOMPLETE && size) {
size_t decoded = read(buffer, size);
QPID_LOG(trace, id << " Sasl::decode(" << size << "): " << decoded);
return decoded;
} else {
return 0;
}
}
size_t Sasl::encode(char* buffer, size_t size)
{
if (state == AUTHENTICATED) {
if (securityLayer.get()) return securityLayer->encode(buffer, size);
else return connection.encode(buffer, size);
} else {
size_t encoded = 0;
if (writeHeader) {
encoded += writeProtocolHeader(buffer, size);
if (!encoded) return 0;
writeHeader = false;
}
if (encoded < size) {
encoded += write(buffer + encoded, size - encoded);
}
if (state == SUCCESS_PENDING) {
state = AUTHENTICATED;
} else if (state == FAILURE_PENDING) {
state = FAILED;
} else {
haveOutput = (encoded == size);
}
QPID_LOG(trace, id << " Sasl::encode(" << size << "): " << encoded);
return encoded;
}
}
bool Sasl::canEncode()
{
if (state == AUTHENTICATED) {
if (securityLayer.get()) return securityLayer->canEncode();
else return connection.canEncode();
} else {
return haveOutput;
}
}
void Sasl::closed()
{
if (state == AUTHENTICATED) {
connection.closed();
} else {
QPID_LOG(info, id << " Connection closed prior to authentication completing");
state = FAILED;
}
}
bool Sasl::isClosed() const
{
if (state == AUTHENTICATED) {
return connection.isClosed();
} else {
return state == FAILED;
}
}
framing::ProtocolVersion Sasl::getVersion() const
{
return connection.getVersion();
}
namespace {
const std::string EMPTY;
}
void Sasl::init(const std::string& mechanism, const std::string* response, const std::string* /*hostname*/)
{
QPID_LOG_CAT(debug, protocol, id << " Received SASL-INIT(" << mechanism << ", " << (response ? *response : EMPTY) << ")");
//TODO: what should we do with hostname here?
std::string c;
respond(authenticator->start(mechanism, response, c), c);
connection.setSaslMechanism(mechanism);
}
void Sasl::response(const std::string* r)
{
QPID_LOG_CAT(debug, protocol, id << " Received SASL-RESPONSE(" << (r ? *r : EMPTY) << ")");
std::string c;
respond(authenticator->step(r, c), c);
}
void Sasl::respond(qpid::SaslServer::Status status, const std::string& chllnge)
{
switch (status) {
case qpid::SaslServer::OK:
connection.setUserid(authenticator->getUserid());
completed(true);
//can't set authenticated & failed until we have actually sent the outcome
state = SUCCESS_PENDING;
securityLayer = authenticator->getSecurityLayer(65535);
if (securityLayer.get()) {
QPID_LOG_CAT(info, security, id << " Security layer installed");
securityLayer->init(&connection);
connection.setSaslSsf(securityLayer->getSsf());
}
QPID_LOG_CAT(info, security, id << " Authenticated as " << authenticator->getUserid());
break;
case qpid::SaslServer::FAIL:
completed(false);
state = FAILURE_PENDING;
QPID_LOG_CAT(info, security, id << " Failed to authenticate");
break;
case qpid::SaslServer::CHALLENGE:
challenge(&chllnge);
QPID_LOG_CAT(info, security, id << " Challenge issued");
break;
}
haveOutput = true;
out.activateOutput();
}
}}} // namespace qpid::broker::amqp
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