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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/amqp/SaslServer.h"
#include "qpid/amqp/Constructor.h"
#include "qpid/amqp/Decoder.h"
#include "qpid/amqp/Descriptor.h"
#include "qpid/amqp/descriptors.h"
#include "qpid/amqp/Encoder.h"
#include "qpid/amqp/typecodes.h"
#include "qpid/log/Statement.h"
#include "qpid/StringUtils.h"
#include <limits>
#include <vector>
using namespace qpid::amqp::sasl;
using namespace qpid::amqp::typecodes;
namespace qpid {
namespace amqp {
namespace {
const std::string SPACE(" ");
const std::string NULL_("NULL");
}
SaslServer::SaslServer(const std::string& id) : Sasl(id) {}
SaslServer::~SaslServer() {}
void SaslServer::mechanisms(const std::string& mechanisms)
{
void* frameToken = startFrame();
std::vector<std::string> parts = split(mechanisms, SPACE);
void* listToken = encoder.startList32(&SASL_MECHANISMS);
if (parts.size() > 1) {
void* arrayToken = encoder.startArray8(Constructor(SYMBOL8));
for (std::vector<std::string>::const_iterator i = parts.begin();i != parts.end(); ++i) {
uint8_t size = i->size() > std::numeric_limits<uint8_t>::max() ? std::numeric_limits<uint8_t>::max() : i->size();
encoder.write(size);
encoder.writeBytes(i->data(), size);
}
encoder.endArray8(parts.size(), arrayToken);
} else {
encoder.writeSymbol(mechanisms);
}
encoder.endList32(1, listToken);
endFrame(frameToken);
QPID_LOG_CAT(debug, protocol, id << " Sent SASL-MECHANISMS(" << mechanisms << ") " << encoder.getPosition());
}
void SaslServer::challenge(const std::string* c)
{
void* frameToken = startFrame();
void* listToken = encoder.startList32(&SASL_CHALLENGE);
if (c) encoder.writeBinary(*c);
else encoder.writeNull();
encoder.endList32(1, listToken);
endFrame(frameToken);
QPID_LOG_CAT(debug, protocol, id << " Sent SASL-CHALLENGE(" << (c ? *c : NULL_) << ") " << encoder.getPosition());
}
void SaslServer::completed(bool succeeded)
{
void* frameToken = startFrame();
void* listToken = encoder.startList8(&SASL_OUTCOME);
encoder.writeUByte(succeeded ? 0 : 1);
encoder.endList8(1, listToken);
endFrame(frameToken);
QPID_LOG_CAT(debug, protocol, id << " Sent SASL-OUTCOME(" << (succeeded ? 0 : 1) << ") " << encoder.getPosition());
}
namespace {
class SaslInitReader : public Reader
{
public:
SaslInitReader(SaslServer& s, uint32_t e) : server(s), expected(e), hasResponse(false), index(0) {}
void onNull(const Descriptor*)
{
++index;
if (index == 2) {
if (--expected == 0) {
server.init(mechanism, 0, 0);
}
} else if (index == 3) {
server.init(mechanism, hasResponse ? &response : 0, 0);
} else {
QPID_LOG(warning, "Unexpected sequence of fields for SASL-INIT: got null for field " << index);
}
}
void onBinary(const CharSequence& r, const Descriptor*)
{
if (++index != 2) QPID_LOG(warning, "Unexpected sequence of fields for SASL-INIT: got binary for field " << index);
response = r.str();
hasResponse = true;
if (--expected == 0) {
server.init(mechanism, &response, 0);
}
}
void onString(const CharSequence& h, const Descriptor*)
{
if (--expected || ++index != 3) {
QPID_LOG(warning, "Unexpected sequence of fields for SASL-INIT: got string for field " << index);
} else {
std::string hostname = h.str();
server.init(mechanism, hasResponse ? &response : 0, &hostname);
}
}
void onSymbol(const CharSequence& m, const Descriptor*)
{
if (++index != 1) QPID_LOG(warning, "Unexpected sequence of fields for SASL-INIT: got symbol for field " << index);
if (--expected) {
mechanism = m.str();
} else {
server.init(m.str(), 0, 0);
}
}
private:
SaslServer& server;
uint32_t expected;
std::string mechanism;
std::string response;
bool hasResponse;
uint32_t index;
};
class SaslResponseReader : public Reader
{
public:
SaslResponseReader(SaslServer& s) : server(s) {}
void onNull(const Descriptor*) { server.response(0); }
void onBinary(const CharSequence& r, const Descriptor*)
{
std::string s = r.str();
server.response(&s);
}
private:
SaslServer& server;
};
}
bool SaslServer::onStartList(uint32_t count, const CharSequence& arguments, const CharSequence& /*full raw data*/, const Descriptor* descriptor)
{
if (!descriptor) {
QPID_LOG(error, "Expected described type in SASL negotiation but got no descriptor");
} else if (descriptor->match(SASL_INIT_SYMBOL, SASL_INIT_CODE)) {
QPID_LOG(trace, "Reading SASL-INIT");
Decoder decoder(arguments.data, arguments.size);
if (count < 1 || count > 3) QPID_LOG(error, "Invalid SASL-INIT frame; got " << count << " fields");
SaslInitReader reader(*this, count);
decoder.read(reader);
} else if (descriptor->match(SASL_RESPONSE_SYMBOL, SASL_RESPONSE_CODE)) {
QPID_LOG(trace, "Reading SASL-RESPONSE (" << std::string(arguments.data, arguments.size) << ") " << count << " elements");
Decoder decoder(arguments.data, arguments.size);
if (count != 1) QPID_LOG(error, "Invalid SASL-RESPONSE frame; exactly one field expected, got " << count);
SaslResponseReader reader(*this);
decoder.read(reader);
} else {
QPID_LOG(error, "Unexpected descriptor in SASL negotiation: " << *descriptor);
}
return false;
}
}} // namespace qpid::amqp
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