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1774 lines (1470 loc) · 45.9 KB
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//
// SecureSocketImpl.cpp
//
// $Id: //poco/1.4/NetSSL_Schannel/src/SecureSocketImpl.cpp#1 $
//
// Library: NetSSL_Schannel
// Package: SSLSockets
// Module: SecureSocketImpl
//
// Copyright (c) 2006-2014, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// SPDX-License-Identifier: BSL-1.0
//
#include "Poco/Net/SecureSocketImpl.h"
#include "Poco/Net/SSLException.h"
#include "Poco/Net/SSLManager.h"
#include "Poco/Net/Utility.h"
#include "Poco/Net/SecureStreamSocketImpl.h"
#include "Poco/Net/StreamSocket.h"
#include "Poco/Net/StreamSocketImpl.h"
#include "Poco/Net/NetException.h"
#include "Poco/Net/DNS.h"
#include "Poco/NumberFormatter.h"
#include "Poco/NumberParser.h"
#include "Poco/String.h"
#include "Poco/Format.h"
#include "Poco/UnicodeConverter.h"
#include <wininet.h>
using Poco::IOException;
using Poco::TimeoutException;
using Poco::InvalidArgumentException;
using Poco::NumberFormatter;
using Poco::Timespan;
namespace Poco {
namespace Net {
class StateMachine
{
public:
typedef bool (StateMachine::*ConditionMethod)(SOCKET sockfd);
typedef void (SecureSocketImpl::*StateImpl)(void);
StateMachine();
~StateMachine();
static StateMachine& instance();
// Conditions
bool readable(SOCKET sockfd);
bool writable(SOCKET sockfd);
bool readOrWritable(SOCKET sockfd);
bool none(SOCKET sockfd);
void select(fd_set* fdRead, fd_set* fdWrite, SOCKET sockfd);
void execute(SecureSocketImpl* pSock);
private:
StateMachine(const StateMachine&);
StateMachine& operator=(const StateMachine&);
typedef std::pair<ConditionMethod, StateImpl> ConditionState;
std::vector<ConditionState> _states;
};
SecureSocketImpl::SecureSocketImpl(Poco::AutoPtr<SocketImpl> pSocketImpl, Context::Ptr pContext):
_pSocket(pSocketImpl),
_pContext(pContext),
_mode(pContext->isForServerUse() ? MODE_SERVER : MODE_CLIENT),
_useMachineStore((pContext->options() & Context::OPT_USE_MACHINE_STORE) != 0),
_clientAuthRequired(pContext->verificationMode() >= Context::VERIFY_STRICT),
_hCertificateStore(0),
_pServerCertificate(0),
_pPeerCertificate(0),
_hCreds(),
_hContext(),
_clientFlags(0),
_serverFlags(0),
_securityFunctions(SSLManager::instance().securityFunctions()),
_pReceiveBuffer(0),
_receiveBufferSize(0),
_pIOBuffer(0),
_pSendBuffer(),
_ioBufferOffset(0),
_ioBufferSize(0),
_streamSizes(),
_outSecBuffer(&_securityFunctions, true),
_inSecBuffer(&_securityFunctions, false),
_ioCharBuffer(IO_BUFFER_SIZE),
_extraSecBuffer(),
_doReadFirst(true),
_bytesRead(0),
_bytesReadSum(0),
_securityStatus(SEC_E_INCOMPLETE_MESSAGE),
_state(ST_INITIAL)
{
_hCreds.dwLower = 0;
_hCreds.dwUpper = 0;
_hContext.dwLower = 0;
_hContext.dwUpper = 0;
_streamSizes.cbBlockSize = _streamSizes.cbHeader = _streamSizes.cbMaximumMessage = _streamSizes.cbTrailer = 0;
initCommon();
}
SecureSocketImpl::~SecureSocketImpl()
{
cleanup();
}
void SecureSocketImpl::initCommon()
{
DWORD commonFlags = ISC_REQ_SEQUENCE_DETECT
| ISC_REQ_REPLAY_DETECT
| ISC_REQ_CONFIDENTIALITY
| ISC_RET_EXTENDED_ERROR
| ISC_REQ_ALLOCATE_MEMORY
| ISC_REQ_STREAM;
if (_pContext->verificationMode() == Context::VERIFY_NONE)
{
commonFlags |= ISC_REQ_MANUAL_CRED_VALIDATION;
}
else if (_pContext->verificationMode() == Context::VERIFY_RELAXED)
{
commonFlags |= ISC_REQ_INTEGRITY;
}
else if (_pContext->verificationMode() == Context::VERIFY_STRICT)
{
commonFlags |= ISC_REQ_INTEGRITY;
}
_serverFlags = commonFlags;
_clientFlags = commonFlags;
if (_pContext->verificationMode() == Context::VERIFY_RELAXED)
_clientFlags |= ISC_REQ_MANUAL_CRED_VALIDATION;
}
void SecureSocketImpl::cleanup()
{
_hostName.clear();
if (_hCreds.dwLower != 0 && _hCreds.dwUpper != 0)
{
_securityFunctions.FreeCredentialsHandle(&_hCreds);
_hCreds.dwLower = 0;
_hCreds.dwUpper = 0;
}
if (_hContext.dwLower != 0 && _hContext.dwUpper != 0)
{
_securityFunctions.DeleteSecurityContext(&_hContext);
_hContext.dwLower = 0;
_hContext.dwUpper = 0;
}
if (_pServerCertificate)
{
CertFreeCertificateContext(_pServerCertificate);
_pServerCertificate = 0;
}
if (_pPeerCertificate)
{
CertFreeCertificateContext(_pPeerCertificate);
_pPeerCertificate = 0;
}
if (_hCertificateStore)
{
CertCloseStore(_hCertificateStore, 0);
_hCertificateStore = 0;
}
// must release buffers before unloading library
_outSecBuffer.release();
_inSecBuffer.release();
delete [] _pReceiveBuffer;
_pReceiveBuffer = 0;
delete [] _pIOBuffer;
_pIOBuffer = 0;
}
SocketImpl* SecureSocketImpl::acceptConnection(SocketAddress& clientAddr)
{
StreamSocket ss = _pSocket->acceptConnection(clientAddr);
Poco::AutoPtr<SecureStreamSocketImpl> pSecureStreamSocketImpl = new SecureStreamSocketImpl(static_cast<StreamSocketImpl*>(ss.impl()), _pContext);
pSecureStreamSocketImpl->acceptSSL();
pSecureStreamSocketImpl->duplicate();
return pSecureStreamSocketImpl;
}
void SecureSocketImpl::connect(const SocketAddress& address, bool performHandshake)
{
_state = ST_ERROR;
_pSocket->connect(address);
connectSSL(performHandshake);
_state = ST_DONE;
}
void SecureSocketImpl::connect(const SocketAddress& address, const Poco::Timespan& timeout, bool performHandshake)
{
_state = ST_ERROR;
_pSocket->connect(address, timeout);
connectSSL(performHandshake);
_state = ST_DONE;
}
void SecureSocketImpl::connectNB(const SocketAddress& address)
{
try
{
_state = ST_CONNECTING;
_pSocket->connectNB(address);
}
catch (...)
{
_state = ST_ERROR;
}
}
void SecureSocketImpl::bind(const SocketAddress& address, bool reuseAddress)
{
_pSocket->bind(address, reuseAddress);
}
void SecureSocketImpl::listen(int backlog)
{
_mode = MODE_SERVER;
if ((_hCreds.dwLower == 0) && (_hCreds.dwUpper == 0))
{
initServerContext();
}
_pSocket->listen(backlog);
}
void SecureSocketImpl::shutdown()
{
// TODO
if (_mode == MODE_SERVER)
serverDisconnect(&_hCreds, &_hContext);
else
clientDisconnect(&_hCreds, &_hContext);
_pSocket->shutdown();
}
void SecureSocketImpl::close()
{
if (_mode == MODE_SERVER)
serverDisconnect(&_hCreds, &_hContext);
else
clientDisconnect(&_hCreds, &_hContext);
_pSocket->close();
cleanup();
}
void SecureSocketImpl::abort()
{
// TODO
_pSocket->shutdown();
}
void SecureSocketImpl::acceptSSL()
{
_state = ST_DONE;
initServerContext();
serverConnect();
}
int SecureSocketImpl::sendBytes(const void* buffer, int length, int flags)
{
if (_state == ST_ERROR)
return 0;
if (_state != ST_DONE)
{
bool establish = _pSocket->getBlocking();
if (establish)
{
while (_state != ST_DONE)
stateMachine();
}
else
{
stateMachine();
return -1;
}
}
int rc = 0;
int dataToSend = length;
int dataSent = 0;
const char* pBuffer = reinterpret_cast<const char*>(buffer);
if (!_pSendBuffer || (_pSendBuffer->size() != _ioBufferSize))
_pSendBuffer = new Poco::Buffer<BYTE>(_ioBufferSize);
while (dataToSend > 0)
{
AutoSecBufferDesc<4> msg(&_securityFunctions, false);
int dataSize = dataToSend;
if (dataSize > _streamSizes.cbMaximumMessage)
dataSize = _streamSizes.cbMaximumMessage;
SecBuffer* pDataBuffer = 0;
SecBuffer* pExtraBuffer = 0;
CopyMemory(_pSendBuffer->begin() + _streamSizes.cbHeader, pBuffer + dataSent, dataSize);
msg.setSecBufferStreamHeader(0, _pSendBuffer->begin(), _streamSizes.cbHeader);
msg.setSecBufferData(1, _pSendBuffer->begin() + _streamSizes.cbHeader, dataSize);
msg.setSecBufferStreamTrailer(2, _pSendBuffer->begin() + _streamSizes.cbHeader + dataSize, _streamSizes.cbTrailer);
msg.setSecBufferEmpty(3);
SECURITY_STATUS securityStatus = _securityFunctions.EncryptMessage(&_hContext, 0, &msg, 0);
if (FAILED(securityStatus) && securityStatus != SEC_E_CONTEXT_EXPIRED)
throw SSLException("Failed to encrypt message", Utility::formatError(securityStatus));
int outBufferLen = msg[0].cbBuffer+msg[1].cbBuffer + msg[2].cbBuffer;
int rcTmp = _pSocket->sendBytes(_pSendBuffer->begin(), outBufferLen, flags);
if (_pSocket->getBlocking() && rcTmp == -1)
{
if (dataSent == 0)
return -1;
return dataSent;
}
if (rcTmp != outBufferLen)
throw SSLException("Failed to send encrypted message");
dataToSend -= dataSize;
dataSent += dataSize;
rc += rcTmp;
}
return dataSent;
}
int SecureSocketImpl::sendRawBytes(const void* buffer, int length, int flags)
{
return _pSocket->sendBytes(buffer, length, flags);
}
int SecureSocketImpl::receiveBytes(void* buffer, int length, int flags)
{
if (_state == ST_ERROR)
return 0;
if (_state != ST_DONE)
{
bool establish = _pSocket->getBlocking();
if (establish)
{
while (_state != ST_DONE)
stateMachine();
}
else
{
stateMachine();
return -1;
}
}
int rc(0);
if (_receiveBufferSize) // any remaining data from previous calls?
{
if (static_cast<DWORD>(length) < _receiveBufferSize)
{
rc = length;
CopyMemory(buffer, _pReceiveBuffer, rc);
MoveMemory(_pReceiveBuffer, _pReceiveBuffer + rc, _receiveBufferSize-rc);
_receiveBufferSize -= rc;
}
else
{
rc = _receiveBufferSize;
CopyMemory(buffer, _pReceiveBuffer, rc);
delete [] _pReceiveBuffer;
_pReceiveBuffer = 0;
_receiveBufferSize = 0;
}
}
else
{
poco_assert (!_pReceiveBuffer);
if (!_pIOBuffer)
_pIOBuffer = new BYTE[_ioBufferSize];
bool cont = true;
do
{
int numBytes = _pSocket->receiveBytes(_pIOBuffer + _ioBufferOffset, _ioBufferSize - _ioBufferOffset);
if (numBytes == -1)
return -1;
else if (numBytes == 0)
break;
else
_ioBufferOffset += numBytes;
int bytesDecoded = 0;
_extraSecBuffer = SecBuffer();
SECURITY_STATUS securityStatus = decodeBufferFull(_pIOBuffer, _ioBufferOffset, reinterpret_cast<char*>(buffer), length, bytesDecoded);
if (_extraSecBuffer.cbBuffer > 0)
{
MoveMemory(_pIOBuffer, _extraSecBuffer.pvBuffer, _extraSecBuffer.cbBuffer);
_ioBufferOffset = _extraSecBuffer.cbBuffer;
}
else
{
_ioBufferOffset = 0;
cont = false;
}
_extraSecBuffer.pvBuffer = 0;
_extraSecBuffer.cbBuffer = 0;
if (bytesDecoded > 0)
{
// bytesDecoded contains everything including overflow data
rc = bytesDecoded;
if (rc > length)
rc = length;
return rc;
}
if (securityStatus == SEC_E_INCOMPLETE_MESSAGE)
{
if (!_pSocket->getBlocking())
return -1;
continue;
}
if (securityStatus == SEC_I_CONTEXT_EXPIRED)
{
SetLastError(securityStatus);
break;
}
if (securityStatus != SEC_E_OK && securityStatus != SEC_I_RENEGOTIATE && securityStatus != SEC_I_CONTEXT_EXPIRED)
{
SetLastError(securityStatus);
break;
}
if (securityStatus == SEC_I_RENEGOTIATE)
{
_doReadFirst = false;
_state = ST_CLIENTHANDSHAKECONDREAD;
if (!_pSocket->getBlocking())
return -1;
securityStatus = performClientHandshakeLoop();
if (securityStatus != SEC_E_OK)
break;
if (_extraSecBuffer.pvBuffer)
{
MoveMemory(_pIOBuffer, _extraSecBuffer.pvBuffer, _extraSecBuffer.cbBuffer);
_ioBufferOffset = _extraSecBuffer.cbBuffer;
}
delete [] _extraSecBuffer.pvBuffer;
}
}
while (cont);
}
return rc;
}
SECURITY_STATUS SecureSocketImpl::decodeMessage(BYTE* pBuffer, DWORD bufSize, AutoSecBufferDesc<4>& msg, SecBuffer*& pDataBuffer, SecBuffer*& pExtraBuffer)
{
msg.setSecBufferData(0, pBuffer, bufSize);
msg.setSecBufferEmpty(1);
msg.setSecBufferEmpty(2);
msg.setSecBufferEmpty(3);
pDataBuffer = 0;
pExtraBuffer = 0;
SECURITY_STATUS securityStatus = _securityFunctions.DecryptMessage(&_hContext, &msg, 0, 0);
if (securityStatus == SEC_E_OK || securityStatus == SEC_I_RENEGOTIATE)
{
for (int i = 1; i < 4; ++i)
{
if (pDataBuffer == 0 && msg[i].BufferType == SECBUFFER_DATA)
pDataBuffer = &msg[i];
if (pExtraBuffer == NULL && msg[i].BufferType == SECBUFFER_EXTRA)
pExtraBuffer = &msg[i];
}
}
return securityStatus;
}
SECURITY_STATUS SecureSocketImpl::decodeBufferFull(BYTE* pBuffer, DWORD bufSize, char* pOutBuffer, int outLength, int& bytesDecoded)
{
poco_check_ptr (pBuffer);
poco_assert (bufSize > 0);
poco_check_ptr (pOutBuffer);
poco_assert (outLength > 0);
poco_assert (_pReceiveBuffer == 0);
_extraSecBuffer.pvBuffer = 0;
_extraSecBuffer.cbBuffer = 0;
SecBuffer* pDataBuffer = 0;
SecBuffer* pExtraBuffer = 0;
int bytes = 0;
bytesDecoded = 0;
#ifdef _DEBUG
Poco::Buffer<BYTE> bufCpy(bufSize);
memcpy(bufCpy.begin(), pBuffer, bufSize);
#endif
Poco::SharedPtr<Poco::Buffer<BYTE> > ptrOverflow;
int overflowIdx = 0;
SECURITY_STATUS securityStatus = SEC_E_OK;
do
{
AutoSecBufferDesc<4> msg(&_securityFunctions, false);
securityStatus = decodeMessage(pBuffer, bufSize, msg, pDataBuffer, pExtraBuffer);
if (pDataBuffer && pDataBuffer->cbBuffer > 0)
{
bytes = pDataBuffer->cbBuffer;
bytesDecoded += bytes;
// do we have room for more data in pOutBuffer?
if (bytes <= outLength) // yes, everything fits in there
{
outLength -= bytes;
memcpy(pOutBuffer, pDataBuffer->pvBuffer, bytes);
pOutBuffer += bytes;
}
else
{
// not enough room in pOutBuffer, write overflow data
// simply reserve bufSize bytes (is large enough even in worst case scenario, no need to re-increase)
if (!ptrOverflow)
ptrOverflow = new Poco::Buffer<BYTE>(bufSize);
if (outLength > 0)
{
// make pOutBuffer full
memcpy(pOutBuffer, pDataBuffer->pvBuffer, outLength);
// no longer valid to write to pOutBuffer
pOutBuffer = 0;
// copy the rest to ptrOverflow
memcpy(ptrOverflow->begin(), reinterpret_cast<char*>(pDataBuffer->pvBuffer) + outLength, bytes - outLength);
overflowIdx = bytes - outLength;
outLength = 0;
}
else
{
// append to ptrOverflow
poco_assert_dbg (overflowIdx + bytes <= ptrOverflow->size());
memcpy(ptrOverflow->begin() + overflowIdx, pDataBuffer->pvBuffer, bytes);
overflowIdx += bytes;
}
}
}
if (pExtraBuffer && pExtraBuffer->cbBuffer > 0)
{
// we have potentially more data to decode
// decode as much as possible
pBuffer = reinterpret_cast<BYTE*>(pExtraBuffer->pvBuffer);
bufSize = pExtraBuffer->cbBuffer;
poco_assert_dbg (memcmp(pBuffer, bufCpy.end() - bufSize, bufSize) == 0);
}
else
{
// everything decoded
if (securityStatus != SEC_E_OK && securityStatus != SEC_E_INCOMPLETE_MESSAGE && securityStatus != SEC_I_RENEGOTIATE && securityStatus != SEC_I_CONTEXT_EXPIRED)
{
throw SSLException("Failed to decode data", Utility::formatError(securityStatus));
}
else if (securityStatus == SEC_E_OK)
{
pBuffer = 0;
bufSize = 0;
}
}
if (securityStatus == SEC_I_RENEGOTIATE)
{
_doReadFirst = false;
securityStatus = performClientHandshakeLoop();
if (securityStatus != SEC_E_OK)
break;
}
}
while (securityStatus == SEC_E_OK && pBuffer);
if (overflowIdx > 0)
{
_pReceiveBuffer = new BYTE[overflowIdx];
memcpy(_pReceiveBuffer, ptrOverflow->begin(), overflowIdx);
_receiveBufferSize = overflowIdx;
}
if (bufSize > 0)
{
_extraSecBuffer.cbBuffer = bufSize;
_extraSecBuffer.pvBuffer = pBuffer;
}
if (pBuffer == 0) securityStatus = SEC_E_OK;
return securityStatus;
}
int SecureSocketImpl::receiveRawBytes(void* buffer, int length, int flags)
{
return _pSocket->receiveBytes(buffer, length, flags);
}
void SecureSocketImpl::setPeerHostName(const std::string& peerHostName)
{
_peerHostName = peerHostName;
}
PCCERT_CONTEXT SecureSocketImpl::loadCertificate(const std::string& certStore, const std::string& certName, bool useMachineStore, bool mustFindCertificate)
{
if (mustFindCertificate && certName.empty())
throw SSLException("Certificate required, but no certificate name provided");
PCCERT_CONTEXT pCert = 0;
std::wstring wcertStore;
Poco::UnicodeConverter::convert(certStore, wcertStore);
if (!_hCertificateStore)
{
if (useMachineStore)
_hCertificateStore = CertOpenStore(CERT_STORE_PROV_SYSTEM, 0, 0, CERT_SYSTEM_STORE_LOCAL_MACHINE, certStore.c_str());
else
_hCertificateStore = CertOpenSystemStoreW(0, wcertStore.c_str());
}
if (!_hCertificateStore)
{
throw SSLException("Failed to open certificate store", certStore, GetLastError());
}
if (!certName.empty())
{
CERT_RDN_ATTR cert_rdn_attr;
cert_rdn_attr.pszObjId = szOID_COMMON_NAME;
cert_rdn_attr.dwValueType = CERT_RDN_ANY_TYPE;
cert_rdn_attr.Value.cbData = (DWORD) certName.size();
cert_rdn_attr.Value.pbData = (BYTE *) certName.c_str();
CERT_RDN cert_rdn;
cert_rdn.cRDNAttr = 1;
cert_rdn.rgRDNAttr = &cert_rdn_attr;
pCert = CertFindCertificateInStore(_hCertificateStore, X509_ASN_ENCODING, 0, CERT_FIND_SUBJECT_ATTR, &cert_rdn, NULL);
if (!pCert)
{
// we throw independently of mustFind. If a name is specified we consider it an error
// if we don't find the given certificate
throw SSLException(Poco::format("Failed to find certificate %s in store %s", certName, certStore));
}
}
if (mustFindCertificate && !pCert)
throw SSLException(Poco::format("Failed to find certificate %s in store %s", certName, certStore));
return pCert;
}
void SecureSocketImpl::acquireSchannelContext(Mode mode, PCCERT_CONTEXT pCertContext, CredHandle& outHandle)
{
SCHANNEL_CRED schannelCred;
ZeroMemory(&schannelCred, sizeof(schannelCred));
schannelCred.dwVersion = SCHANNEL_CRED_VERSION;
if (pCertContext != 0)
{
schannelCred.cCreds = 1; // how many cred are stored in &pCertContext
schannelCred.paCred = &pCertContext;
}
schannelCred.grbitEnabledProtocols = proto();
// Windows NT and Windows Me/98/95: revocation checking not supported via flags
if (_pContext->options() & Context::OPT_PERFORM_REVOCATION_CHECK)
schannelCred.dwFlags |= SCH_CRED_REVOCATION_CHECK_CHAIN;
else
schannelCred.dwFlags |= SCH_CRED_IGNORE_NO_REVOCATION_CHECK | SCH_CRED_IGNORE_REVOCATION_OFFLINE;
if (mode == MODE_SERVER)
{
if (_pContext->verificationMode() == Context::VERIFY_STRICT)
schannelCred.dwFlags |= SCH_CRED_NO_SYSTEM_MAPPER;
if (_pContext->verificationMode() == Context::VERIFY_NONE)
schannelCred.dwFlags |= SCH_CRED_MANUAL_CRED_VALIDATION;
}
else
{
if (_pContext->verificationMode() == Context::VERIFY_STRICT)
schannelCred.dwFlags |= SCH_CRED_NO_DEFAULT_CREDS;
else
schannelCred.dwFlags |= SCH_CRED_USE_DEFAULT_CREDS;
if (_pContext->verificationMode() == Context::VERIFY_NONE)
schannelCred.dwFlags |= SCH_CRED_MANUAL_CRED_VALIDATION | SCH_CRED_NO_SERVERNAME_CHECK;
}
#if defined(SCH_USE_STRONG_CRYPTO)
if (_pContext->options() & Context::OPT_USE_STRONG_CRYPTO)
schannelCred.dwFlags |= SCH_USE_STRONG_CRYPTO;
#endif
schannelCred.hRootStore = _pContext->certificateStore();
TimeStamp tsExpiry;
tsExpiry.LowPart = tsExpiry.HighPart = 0;
SECURITY_STATUS status = _securityFunctions.AcquireCredentialsHandleW(
NULL,
UNISP_NAME_W,
mode == MODE_SERVER ? SECPKG_CRED_INBOUND : SECPKG_CRED_OUTBOUND,
NULL,
&schannelCred,
NULL,
NULL,
&outHandle,
&tsExpiry);
if (status != SEC_E_OK)
{
throw SSLException("Failed to acquire Schannel credentials", Utility::formatError(status));
}
}
void SecureSocketImpl::connectSSL(bool completeHandshake)
{
poco_assert_dbg(_pPeerCertificate == 0);
poco_assert_dbg(_hostName.empty());
_hostName = _pSocket->address().host().toString();
initClientContext();
performClientHandshake();
clientConnectVerify();
}
void SecureSocketImpl::clientConnectVerify()
{
poco_assert_dbg(!_pPeerCertificate);
poco_assert_dbg(!_hostName.empty());
try
{
SECURITY_STATUS securityStatus = _securityFunctions.QueryContextAttributesW(&_hContext, SECPKG_ATTR_REMOTE_CERT_CONTEXT, (PVOID) &_pPeerCertificate);
if (securityStatus != SEC_E_OK)
throw SSLException("Failed to obtain peer certificate", Utility::formatError(securityStatus));
clientVerifyCertificate(_pPeerCertificate, _hostName, 0);
securityStatus = _securityFunctions.QueryContextAttributesW(&_hContext, SECPKG_ATTR_STREAM_SIZES, &_streamSizes);
if (securityStatus != SEC_E_OK)
throw SSLException("Failed to query stream sizes", Utility::formatError(securityStatus));
_ioBufferSize = _streamSizes.cbHeader + _streamSizes.cbMaximumMessage + _streamSizes.cbTrailer;
_state = ST_DONE;
}
catch (...)
{
if (_pPeerCertificate)
{
CertFreeCertificateContext(_pPeerCertificate);
_pPeerCertificate = 0;
}
throw;
}
}
void SecureSocketImpl::initClientContext()
{
_pServerCertificate = loadCertificate(_pContext->certificateStoreName(), _pContext->certificateName(), _useMachineStore, false);
acquireSchannelContext(MODE_CLIENT, _pServerCertificate, _hCreds);
}
void SecureSocketImpl::performClientHandshake()
{
performInitialClientHandshake();
performClientHandshakeLoop();
}
void SecureSocketImpl::performInitialClientHandshake()
{
// get initial security token
_outSecBuffer = AutoSecBufferDesc<1>(&_securityFunctions, true);
_outSecBuffer.setSecBufferToken(0, 0, 0);
TimeStamp ts;
DWORD contextAttributes(0);
std::wstring whostName;
Poco::UnicodeConverter::convert(_hostName, whostName);
_securityStatus = _securityFunctions.InitializeSecurityContextW(
&_hCreds,
0,
const_cast<SEC_WCHAR*>(whostName.c_str()),
_clientFlags,
0,
SECURITY_NATIVE_DREP,
0,
0,
&_hContext, // init hContext
&_outSecBuffer,
&contextAttributes,
&ts);
if (_securityStatus != SEC_E_OK)
{
if (_securityStatus == SEC_I_INCOMPLETE_CREDENTIALS)
{
// the server is asking for client credentials, we didn't send one because we were not configured to do so, abort
throw SSLException("Handshake failed: No client credentials configured");
}
else if (_securityStatus != SEC_I_CONTINUE_NEEDED)
{
throw SSLException("Handshake failed", Utility::formatError(_securityStatus));
}
}
// incomplete credentials: more calls to InitializeSecurityContext needed
// send the token
sendInitialTokenOutBuffer();
if (_securityStatus == SEC_E_OK)
{
// The security context was successfully initialized.
// There is no need for another InitializeSecurityContext (Schannel) call.
_state = ST_DONE;
return;
}
//SEC_I_CONTINUE_NEEDED was returned:
// Wait for a return token. The returned token is then passed in
// another call to InitializeSecurityContext (Schannel). The output token can be empty.
_extraSecBuffer = SecBuffer();
_doReadFirst = true;
_state = ST_CLIENTHANDSHAKECONDREAD;
_securityStatus = SEC_E_INCOMPLETE_MESSAGE;
}
void SecureSocketImpl::sendInitialTokenOutBuffer()
{
// send the token
if (_outSecBuffer[0].cbBuffer != 0 && _outSecBuffer[0].pvBuffer != 0)
{
int numBytes = sendRawBytes(_outSecBuffer[0].pvBuffer, _outSecBuffer[0].cbBuffer);
if (numBytes != _outSecBuffer[0].cbBuffer)
throw SSLException("Failed to send token to the server");
}
}
SECURITY_STATUS SecureSocketImpl::performClientHandshakeLoop()
{
_bytesRead = 0;
_bytesReadSum = 0;
_securityStatus = SEC_E_INCOMPLETE_MESSAGE;
while (_securityStatus == SEC_I_CONTINUE_NEEDED || _securityStatus == SEC_E_INCOMPLETE_MESSAGE || _securityStatus == SEC_I_INCOMPLETE_CREDENTIALS)
{
performClientHandshakeLoopCondRead();
if (_securityStatus == SEC_E_OK)
performClientHandshakeLoopOK();
else if (_securityStatus == SEC_I_CONTINUE_NEEDED)
performClientHandshakeLoopContinueNeeded();
else if (FAILED(_securityStatus))
{
if (_outFlags & ISC_RET_EXTENDED_ERROR)
performClientHandshakeLoopExtError();
else
performClientHandshakeLoopError();
}
else
performClientHandshakeLoopIncompleteMessage();
}
if (FAILED(_securityStatus))
{
performClientHandshakeLoopError();
}
return _securityStatus;
}
void SecureSocketImpl::performClientHandshakeLoopExtError()
{
poco_assert_dbg (FAILED(_securityStatus));
performClientHandshakeSendOutBuffer();
performClientHandshakeLoopError();
}
void SecureSocketImpl::performClientHandshakeLoopError()
{
poco_assert_dbg (FAILED(_securityStatus));
cleanup();
_state = ST_ERROR;
throw SSLException("Error during handshake", Utility::formatError(_securityStatus));
}
void SecureSocketImpl::performClientHandshakeSendOutBuffer()
{
if (_outSecBuffer[0].cbBuffer != 0 && _outSecBuffer[0].pvBuffer != NULL)
{
int numBytes = sendRawBytes(static_cast<const void*>(_outSecBuffer[0].pvBuffer), _outSecBuffer[0].cbBuffer);
if (numBytes != _outSecBuffer[0].cbBuffer)
{
throw SSLException("Socket error during handshake");
}
_bytesReadSum = 0;
_outSecBuffer.release(0);
}
}
void SecureSocketImpl::performClientHandshakeExtraBuffer()
{
if (_inSecBuffer[1].BufferType == SECBUFFER_EXTRA)
{
_extraSecBuffer.pvBuffer = new BYTE[_inSecBuffer[1].cbBuffer];
MoveMemory(_extraSecBuffer.pvBuffer, _ioCharBuffer.begin() + (_bytesReadSum - _inSecBuffer[1].cbBuffer), _inSecBuffer[1].cbBuffer);
_extraSecBuffer.cbBuffer = _inSecBuffer[1].cbBuffer;
_extraSecBuffer.BufferType = SECBUFFER_TOKEN;
}
else
{
_extraSecBuffer.pvBuffer = 0;
_extraSecBuffer.cbBuffer = 0;
_extraSecBuffer.BufferType = SECBUFFER_EMPTY;
}
}
void SecureSocketImpl::performClientHandshakeLoopOK()
{
poco_assert_dbg(_securityStatus == SEC_E_OK);
performClientHandshakeSendOutBuffer();
performClientHandshakeExtraBuffer();
_state = ST_VERIFY;