diff options
Diffstat (limited to 'src/network/ssl/qsslsocket_openssl.cpp')
| -rw-r--r-- | src/network/ssl/qsslsocket_openssl.cpp | 929 |
1 files changed, 929 insertions, 0 deletions
diff --git a/src/network/ssl/qsslsocket_openssl.cpp b/src/network/ssl/qsslsocket_openssl.cpp new file mode 100644 index 0000000..6f8cf42 --- /dev/null +++ b/src/network/ssl/qsslsocket_openssl.cpp @@ -0,0 +1,929 @@ +/**************************************************************************** +** +** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). +** Contact: Qt Software Information (qt-info@nokia.com) +** +** This file is part of the QtNetwork module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** No Commercial Usage +** This file contains pre-release code and may not be distributed. +** You may use this file in accordance with the terms and conditions +** contained in the either Technology Preview License Agreement or the +** Beta Release License Agreement. +** +** GNU Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 2.1 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 2.1 requirements +** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** In addition, as a special exception, Nokia gives you certain +** additional rights. These rights are described in the Nokia Qt LGPL +** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this +** package. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 3.0 as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU General Public License version 3.0 requirements will be +** met: http://www.gnu.org/copyleft/gpl.html. +** +** If you are unsure which license is appropriate for your use, please +** contact the sales department at qt-sales@nokia.com. +** $QT_END_LICENSE$ +** +****************************************************************************/ + +//#define QSSLSOCKET_DEBUG + +#include "qsslsocket_openssl_p.h" +#include "qsslsocket_openssl_symbols_p.h" +#include "qsslsocket.h" +#include "qsslcertificate_p.h" +#include "qsslcipher_p.h" + +#include <QtCore/qdatetime.h> +#include <QtCore/qdebug.h> +#include <QtCore/qdir.h> +#include <QtCore/qdiriterator.h> +#include <QtCore/qfile.h> +#include <QtCore/qfileinfo.h> +#include <QtCore/qmutex.h> +#include <QtCore/qthread.h> +#include <QtCore/qurl.h> +#include <QtCore/qvarlengtharray.h> + +static void initNetworkResources() +{ + // Initialize resources + Q_INIT_RESOURCE(network); +} + +QT_BEGIN_NAMESPACE + +// Useful defines +#define SSL_ERRORSTR() QString::fromLocal8Bit(q_ERR_error_string(q_ERR_get_error(), NULL)) + +/* \internal + + From OpenSSL's thread(3) manual page: + + OpenSSL can safely be used in multi-threaded applications provided that at + least two callback functions are set. + + locking_function(int mode, int n, const char *file, int line) is needed to + perform locking on shared data structures. (Note that OpenSSL uses a + number of global data structures that will be implicitly shared + when-whenever ever multiple threads use OpenSSL.) Multi-threaded + applications will crash at random if it is not set. ... + ... + id_function(void) is a function that returns a thread ID. It is not + needed on Windows nor on platforms where getpid() returns a different + ID for each thread (most notably Linux) +*/ +class QOpenSslLocks +{ +public: + inline QOpenSslLocks() + : initLocker(QMutex::Recursive), + locksLocker(QMutex::Recursive) + { + QMutexLocker locker(&locksLocker); + int numLocks = q_CRYPTO_num_locks(); + locks = new QMutex *[numLocks]; + memset(locks, 0, numLocks * sizeof(QMutex *)); + } + inline ~QOpenSslLocks() + { + QMutexLocker locker(&locksLocker); + for (int i = 0; i < q_CRYPTO_num_locks(); ++i) + delete locks[i]; + delete [] locks; + + QSslSocketPrivate::deinitialize(); + } + inline QMutex *lock(int num) + { + QMutexLocker locker(&locksLocker); + QMutex *tmp = locks[num]; + if (!tmp) + tmp = locks[num] = new QMutex(QMutex::Recursive); + return tmp; + } + + QMutex *globalLock() + { + return &locksLocker; + } + + QMutex *initLock() + { + return &initLocker; + } + +private: + QMutex initLocker; + QMutex locksLocker; + QMutex **locks; +}; +Q_GLOBAL_STATIC(QOpenSslLocks, openssl_locks) + +extern "C" { +static void locking_function(int mode, int lockNumber, const char *, int) +{ + QMutex *mutex = openssl_locks()->lock(lockNumber); + + // Lock or unlock it + if (mode & CRYPTO_LOCK) + mutex->lock(); + else + mutex->unlock(); +} +static unsigned long id_function() +{ + return (unsigned long)QThread::currentThreadId(); +} +} // extern "C" + +QSslSocketBackendPrivate::QSslSocketBackendPrivate() + : ssl(0), + ctx(0), + readBio(0), + writeBio(0), + session(0) +{ + // Calls SSL_library_init(). + ensureInitialized(); +} + +QSslSocketBackendPrivate::~QSslSocketBackendPrivate() +{ +} + +QSslCipher QSslSocketBackendPrivate::QSslCipher_from_SSL_CIPHER(SSL_CIPHER *cipher) +{ + QSslCipher ciph; + + char buf [256]; + QString descriptionOneLine = QString::fromLatin1(q_SSL_CIPHER_description(cipher, buf, sizeof(buf))); + + QStringList descriptionList = descriptionOneLine.split(QLatin1String(" "), QString::SkipEmptyParts); + if (descriptionList.size() > 5) { + // ### crude code. + ciph.d->isNull = false; + ciph.d->name = descriptionList.at(0); + + QString protoString = descriptionList.at(1); + ciph.d->protocolString = protoString; + ciph.d->protocol = QSsl::UnknownProtocol; + if (protoString == QLatin1String("SSLv3")) + ciph.d->protocol = QSsl::SslV3; + else if (protoString == QLatin1String("SSLv2")) + ciph.d->protocol = QSsl::SslV2; + else if (protoString == QLatin1String("TLSv1")) + ciph.d->protocol = QSsl::TlsV1; + + if (descriptionList.at(2).startsWith(QLatin1String("Kx="))) + ciph.d->keyExchangeMethod = descriptionList.at(2).mid(3); + if (descriptionList.at(3).startsWith(QLatin1String("Au="))) + ciph.d->authenticationMethod = descriptionList.at(3).mid(3); + if (descriptionList.at(4).startsWith(QLatin1String("Enc="))) + ciph.d->encryptionMethod = descriptionList.at(4).mid(4); + ciph.d->exportable = (descriptionList.size() > 6 && descriptionList.at(6) == QLatin1String("export")); + + ciph.d->bits = cipher->strength_bits; + ciph.d->supportedBits = cipher->alg_bits; + + } + return ciph; +} + +// ### This list is shared between all threads, and protected by a +// mutex. Investigate using thread local storage instead. +struct QSslErrorList +{ + QMutex mutex; + QList<QPair<int, int> > errors; +}; +Q_GLOBAL_STATIC(QSslErrorList, _q_sslErrorList) +static int q_X509Callback(int ok, X509_STORE_CTX *ctx) +{ + if (!ok) { + // Store the error and at which depth the error was detected. + _q_sslErrorList()->errors << qMakePair<int, int>(ctx->error, ctx->error_depth); + } + // Always return OK to allow verification to continue. We're handle the + // errors gracefully after collecting all errors, after verification has + // completed. + return 1; +} + +bool QSslSocketBackendPrivate::initSslContext() +{ + Q_Q(QSslSocket); + + // Create and initialize SSL context. Accept SSLv2, SSLv3 and TLSv1. + bool client = (mode == QSslSocket::SslClientMode); + + bool reinitialized = false; +init_context: + switch (configuration.protocol) { + case QSsl::SslV2: + ctx = q_SSL_CTX_new(client ? q_SSLv2_client_method() : q_SSLv2_server_method()); + break; + case QSsl::SslV3: + ctx = q_SSL_CTX_new(client ? q_SSLv3_client_method() : q_SSLv3_server_method()); + break; + case QSsl::AnyProtocol: + default: + ctx = q_SSL_CTX_new(client ? q_SSLv23_client_method() : q_SSLv23_server_method()); + break; + case QSsl::TlsV1: + ctx = q_SSL_CTX_new(client ? q_TLSv1_client_method() : q_TLSv1_server_method()); + break; + } + if (!ctx) { + // After stopping Flash 10 the SSL library looses its ciphers. Try re-adding them + // by re-initializing the library. + if (!reinitialized) { + reinitialized = true; + if (q_SSL_library_init() == 1) + goto init_context; + } + + // ### Bad error code + q->setErrorString(QSslSocket::tr("Error creating SSL context (%1)").arg(SSL_ERRORSTR())); + q->setSocketError(QAbstractSocket::UnknownSocketError); + emit q->error(QAbstractSocket::UnknownSocketError); + return false; + } + + // Enable all bug workarounds. + q_SSL_CTX_set_options(ctx, SSL_OP_ALL); + + // Initialize ciphers + QByteArray cipherString; + int first = true; + QList<QSslCipher> ciphers = configuration.ciphers; + if (ciphers.isEmpty()) + ciphers = defaultCiphers(); + foreach (const QSslCipher &cipher, ciphers) { + if (first) + first = false; + else + cipherString.append(":"); + cipherString.append(cipher.name().toLatin1()); + } + + if (!q_SSL_CTX_set_cipher_list(ctx, cipherString.data())) { + // ### Bad error code + q->setErrorString(QSslSocket::tr("Invalid or empty cipher list (%1)").arg(SSL_ERRORSTR())); + q->setSocketError(QAbstractSocket::UnknownSocketError); + emit q->error(QAbstractSocket::UnknownSocketError); + return false; + } + + // Add all our CAs to this store. + foreach (const QSslCertificate &caCertificate, q->caCertificates()) + q_X509_STORE_add_cert(ctx->cert_store, (X509 *)caCertificate.handle()); + + // Register a custom callback to get all verification errors. + X509_STORE_set_verify_cb_func(ctx->cert_store, q_X509Callback); + + if (!configuration.localCertificate.isNull()) { + // Require a private key as well. + if (configuration.privateKey.isNull()) { + q->setErrorString(QSslSocket::tr("Cannot provide a certificate with no key, %1").arg(SSL_ERRORSTR())); + emit q->error(QAbstractSocket::UnknownSocketError); + return false; + } + + // Load certificate + if (!q_SSL_CTX_use_certificate(ctx, (X509 *)configuration.localCertificate.handle())) { + q->setErrorString(QSslSocket::tr("Error loading local certificate, %1").arg(SSL_ERRORSTR())); + emit q->error(QAbstractSocket::UnknownSocketError); + return false; + } + + // Load private key + EVP_PKEY *pkey = q_EVP_PKEY_new(); + if (configuration.privateKey.algorithm() == QSsl::Rsa) + q_EVP_PKEY_assign_RSA(pkey, (RSA *)configuration.privateKey.handle()); + else + q_EVP_PKEY_assign_DSA(pkey, (DSA *)configuration.privateKey.handle()); + if (!q_SSL_CTX_use_PrivateKey(ctx, pkey)) { + q->setErrorString(QSslSocket::tr("Error loading private key, %1").arg(SSL_ERRORSTR())); + emit q->error(QAbstractSocket::UnknownSocketError); + return false; + } + + // Check if the certificate matches the private key. + if (!q_SSL_CTX_check_private_key(ctx)) { + q->setErrorString(QSslSocket::tr("Private key does not certificate public key, %1").arg(SSL_ERRORSTR())); + emit q->error(QAbstractSocket::UnknownSocketError); + return false; + } + } + + // Initialize peer verification. + if (configuration.peerVerifyMode == QSslSocket::VerifyNone) { + q_SSL_CTX_set_verify(ctx, SSL_VERIFY_NONE, 0); + } else { + q_SSL_CTX_set_verify(ctx, SSL_VERIFY_PEER, q_X509Callback); + } + + // Set verification depth. + if (configuration.peerVerifyDepth != 0) + q_SSL_CTX_set_verify_depth(ctx, configuration.peerVerifyDepth); + + // Create and initialize SSL session + if (!(ssl = q_SSL_new(ctx))) { + // ### Bad error code + q->setErrorString(QSslSocket::tr("Error creating SSL session, %1").arg(SSL_ERRORSTR())); + q->setSocketError(QAbstractSocket::UnknownSocketError); + emit q->error(QAbstractSocket::UnknownSocketError); + return false; + } + + // Clear the session. + q_SSL_clear(ssl); + errorList.clear(); + + // Initialize memory BIOs for encryption and decryption. + readBio = q_BIO_new(q_BIO_s_mem()); + writeBio = q_BIO_new(q_BIO_s_mem()); + if (!readBio || !writeBio) { + // ### Bad error code + q->setErrorString(QSslSocket::tr("Error creating SSL session: %1").arg(SSL_ERRORSTR())); + q->setSocketError(QAbstractSocket::UnknownSocketError); + emit q->error(QAbstractSocket::UnknownSocketError); + return false; + } + + // Assign the bios. + q_SSL_set_bio(ssl, readBio, writeBio); + + if (mode == QSslSocket::SslClientMode) + q_SSL_set_connect_state(ssl); + else + q_SSL_set_accept_state(ssl); + + return true; +} + +/*! + \internal +*/ +void QSslSocketPrivate::deinitialize() +{ + q_CRYPTO_set_id_callback(0); + q_CRYPTO_set_locking_callback(0); +} + +/*! + \internal + + Declared static in QSslSocketPrivate, makes sure the SSL libraries have + been initialized. +*/ +bool QSslSocketPrivate::ensureInitialized() +{ + if (!q_resolveOpenSslSymbols()) + return false; + + // Check if the library itself needs to be initialized. + QMutexLocker locker(openssl_locks()->initLock()); + static int q_initialized = false; + if (!q_initialized) { + q_initialized = true; + + // Initialize resources + initNetworkResources(); + + // Initialize OpenSSL. + q_CRYPTO_set_id_callback(id_function); + q_CRYPTO_set_locking_callback(locking_function); + if (q_SSL_library_init() != 1) + return false; + q_SSL_load_error_strings(); + q_OpenSSL_add_all_algorithms(); + + // Initialize OpenSSL's random seed. + if (!q_RAND_status()) { + struct { + int msec; + int sec; + void *stack; + } randomish; + + int attempts = 500; + do { + if (attempts < 500) { +#ifdef Q_OS_UNIX + struct timespec ts = {0, 33333333}; + nanosleep(&ts, 0); +#else + Sleep(3); +#endif + randomish.msec = attempts; + } + randomish.stack = (void *)&randomish; + randomish.msec = QTime::currentTime().msec(); + randomish.sec = QTime::currentTime().second(); + q_RAND_seed((const char *)&randomish, sizeof(randomish)); + } while (!q_RAND_status() && --attempts); + if (!attempts) + return false; + } + + resetDefaultCiphers(); + setDefaultCaCertificates(systemCaCertificates()); + } + return true; +} + +/*! + \internal + + Declared static in QSslSocketPrivate, backend-dependent loading of + application-wide global ciphers. +*/ +void QSslSocketPrivate::resetDefaultCiphers() +{ + SSL_CTX *myCtx = q_SSL_CTX_new(q_SSLv23_client_method()); + SSL *mySsl = q_SSL_new(myCtx); + + QList<QSslCipher> ciphers; + + STACK_OF(SSL_CIPHER) *supportedCiphers = q_SSL_get_ciphers(mySsl); + for (int i = 0; i < q_sk_SSL_CIPHER_num(supportedCiphers); ++i) { + if (SSL_CIPHER *cipher = q_sk_SSL_CIPHER_value(supportedCiphers, i)) { + if (cipher->valid) { + QSslCipher ciph = QSslSocketBackendPrivate::QSslCipher_from_SSL_CIPHER(cipher); + if (!ciph.isNull()) { + if (!ciph.name().toLower().startsWith(QLatin1String("adh"))) + ciphers << ciph; + } + } + } + } + + q_SSL_CTX_free(myCtx); + q_SSL_free(mySsl); + + setDefaultSupportedCiphers(ciphers); + setDefaultCiphers(ciphers); +} + +QList<QSslCertificate> QSslSocketPrivate::systemCaCertificates() +{ +#ifdef QQ_OS_UNIX + // Check known locations for the system's default bundle. ### On Windows, + // we should use CAPI to find the bundle, and not rely on default unix + // locations. + const char *standardLocations[] = {"/etc/ssl/certs/", +#if 0 + // KDE uses KConfig for its SSL store, + // but it also stores the bundle at + // this location + "$HOME/.kde/share/apps/kssl/ca-bundle.crt", +#endif + 0}; + const char **it = standardLocations; + QStringList nameFilter; + nameFilter << QLatin1String("*.pem") << QLatin1String("*.crt"); + while (*it) { + if (QDirIterator(QLatin1String(*it), nameFilter).hasNext()) + return certificatesFromPath(QLatin1String(*it)); + ++it; + } +#endif + + // Qt provides a default bundle when we cannot detect the system's default + // bundle. + QFile caBundle(QLatin1String(":/trolltech/network/ssl/qt-ca-bundle.crt")); + if (caBundle.open(QIODevice::ReadOnly | QIODevice::Text)) + return QSslCertificate::fromDevice(&caBundle); + + // Unreachable; return no bundle. + return QList<QSslCertificate>(); +} + +void QSslSocketBackendPrivate::startClientEncryption() +{ + if (!initSslContext()) { + // ### report error: internal OpenSSL failure + return; + } + + // Start connecting. This will place outgoing data in the BIO, so we + // follow up with calling transmit(). + testConnection(); + transmit(); +} + +void QSslSocketBackendPrivate::startServerEncryption() +{ + if (!initSslContext()) { + // ### report error: internal OpenSSL failure + return; + } + + // Start connecting. This will place outgoing data in the BIO, so we + // follow up with calling transmit(). + testConnection(); + transmit(); +} + +/*! + \internal + + Transmits encrypted data between the BIOs and the socket. +*/ +void QSslSocketBackendPrivate::transmit() +{ + Q_Q(QSslSocket); + + // If we don't have any SSL context, don't bother transmitting. + if (!ssl) + return; + + bool transmitting; + do { + transmitting = false; + + // If the connection is secure, we can transfer data from the write + // buffer (in plain text) to the write BIO through SSL_write. + if (connectionEncrypted && !writeBuffer.isEmpty()) { + qint64 totalBytesWritten = 0; + int nextDataBlockSize; + while ((nextDataBlockSize = writeBuffer.nextDataBlockSize()) > 0) { + int writtenBytes = q_SSL_write(ssl, writeBuffer.readPointer(), nextDataBlockSize); + if (writtenBytes <= 0) { + // ### Better error handling. + q->setErrorString(QSslSocket::tr("Unable to write data: %1").arg(SSL_ERRORSTR())); + q->setSocketError(QAbstractSocket::UnknownSocketError); + emit q->error(QAbstractSocket::UnknownSocketError); + return; + } +#ifdef QSSLSOCKET_DEBUG + qDebug() << "QSslSocketBackendPrivate::transmit: encrypted" << writtenBytes << "bytes"; +#endif + writeBuffer.free(writtenBytes); + totalBytesWritten += writtenBytes; + } + + if (totalBytesWritten > 0) { + // Don't emit bytesWritten() recursively. + if (!emittedBytesWritten) { + emittedBytesWritten = true; + emit q->bytesWritten(totalBytesWritten); + emittedBytesWritten = false; + } + } + } + + // Check if we've got any data to be written to the socket. + QVarLengthArray<char, 4096> data; + int pendingBytes; + while (plainSocket->isValid() && (pendingBytes = q_BIO_pending(writeBio)) > 0) { + // Read encrypted data from the write BIO into a buffer. + data.resize(pendingBytes); + int encryptedBytesRead = q_BIO_read(writeBio, data.data(), pendingBytes); + + // Write encrypted data from the buffer to the socket. + plainSocket->write(data.constData(), encryptedBytesRead); +#ifdef QSSLSOCKET_DEBUG + qDebug() << "QSslSocketBackendPrivate::transmit: wrote" << encryptedBytesRead << "encrypted bytes to the socket"; +#endif + transmitting = true; + } + + // Check if we've got any data to be read from the socket. + if (!connectionEncrypted || !readBufferMaxSize || readBuffer.size() < readBufferMaxSize) + while ((pendingBytes = plainSocket->bytesAvailable()) > 0) { + // Read encrypted data from the socket into a buffer. + data.resize(pendingBytes); + int decryptedBytesRead = plainSocket->read(data.data(), pendingBytes); +#ifdef QSSLSOCKET_DEBUG + qDebug() << "QSslSocketBackendPrivate::transmit: read" << decryptedBytesRead << "encrypted bytes from the socket"; +#endif + // Write encrypted data from the buffer into the read BIO. + q_BIO_write(readBio, data.constData(), decryptedBytesRead); + transmitting = true; + } + + // If the connection isn't secured yet, this is the time to retry the + // connect / accept. + if (!connectionEncrypted) { +#ifdef QSSLSOCKET_DEBUG + qDebug() << "QSslSocketBackendPrivate::transmit: testing encryption"; +#endif + if (testConnection()) { +#ifdef QSSLSOCKET_DEBUG + qDebug() << "QSslSocketBackendPrivate::transmit: encryption established"; +#endif + connectionEncrypted = true; + transmitting = true; + } else if (plainSocket->state() != QAbstractSocket::ConnectedState) { +#ifdef QSSLSOCKET_DEBUG + qDebug() << "QSslSocketBackendPrivate::transmit: connection lost"; +#endif + break; + } else { +#ifdef QSSLSOCKET_DEBUG + qDebug() << "QSslSocketBackendPrivate::transmit: encryption not done yet"; +#endif + } + } + + // If the request is small and the remote host closes the transmission + // after sending, there's a chance that testConnection() will already + // have triggered a shutdown. + if (!ssl) + continue; + + // We always read everything from the SSL decryption buffers, even if + // we have a readBufferMaxSize. There's no point in leaving data there + // just so that readBuffer.size() == readBufferMaxSize. + int readBytes = 0; + data.resize(4096); + ::memset(data.data(), 0, data.size()); + do { + // Don't use SSL_pending(). It's very unreliable. + if ((readBytes = q_SSL_read(ssl, data.data(), data.size())) > 0) { +#ifdef QSSLSOCKET_DEBUG + qDebug() << "QSslSocketBackendPrivate::transmit: decrypted" << readBytes << "bytes"; +#endif + char *ptr = readBuffer.reserve(readBytes); + ::memcpy(ptr, data.data(), readBytes); + + if (readyReadEmittedPointer) + *readyReadEmittedPointer = true; + emit q->readyRead(); + transmitting = true; + continue; + } + + // Error. + switch (q_SSL_get_error(ssl, readBytes)) { + case SSL_ERROR_WANT_READ: + case SSL_ERROR_WANT_WRITE: + // Out of data. + break; + case SSL_ERROR_ZERO_RETURN: + // The remote host closed the connection. +#ifdef QSSLSOCKET_DEBUG + qDebug() << "QSslSocketBackendPrivate::transmit: remote disconnect"; +#endif + plainSocket->disconnectFromHost(); + break; + default: + // ### Handle errors better. + q->setErrorString(QSslSocket::tr("Error while reading: %1").arg(SSL_ERRORSTR())); + q->setSocketError(QAbstractSocket::UnknownSocketError); + emit q->error(QAbstractSocket::UnknownSocketError); + break; + } + } while (ssl && readBytes > 0); + } while (ssl && ctx && transmitting); +} + +static QSslError _q_OpenSSL_to_QSslError(int errorCode, const QSslCertificate &cert) +{ + QSslError error; + switch (errorCode) { + case X509_V_OK: + // X509_V_OK is also reported if the peer had no certificate. + break; + case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT: + error = QSslError(QSslError::UnableToGetIssuerCertificate, cert); break; + case X509_V_ERR_UNABLE_TO_DECRYPT_CERT_SIGNATURE: + error = QSslError(QSslError::UnableToDecryptCertificateSignature, cert); break; + case X509_V_ERR_UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY: + error = QSslError(QSslError::UnableToDecodeIssuerPublicKey, cert); break; + case X509_V_ERR_CERT_SIGNATURE_FAILURE: + error = QSslError(QSslError::CertificateSignatureFailed, cert); break; + case X509_V_ERR_CERT_NOT_YET_VALID: + error = QSslError(QSslError::CertificateNotYetValid, cert); break; + case X509_V_ERR_CERT_HAS_EXPIRED: + error = QSslError(QSslError::CertificateExpired, cert); break; + case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD: + error = QSslError(QSslError::InvalidNotBeforeField, cert); break; + case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD: + error = QSslError(QSslError::InvalidNotAfterField, cert); break; + case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT: + error = QSslError(QSslError::SelfSignedCertificate, cert); break; + case X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN: + error = QSslError(QSslError::SelfSignedCertificateInChain, cert); break; + case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY: + error = QSslError(QSslError::UnableToGetLocalIssuerCertificate, cert); break; + case X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE: + error = QSslError(QSslError::UnableToVerifyFirstCertificate, cert); break; + case X509_V_ERR_CERT_REVOKED: + error = QSslError(QSslError::CertificateRevoked, cert); break; + case X509_V_ERR_INVALID_CA: + error = QSslError(QSslError::InvalidCaCertificate, cert); break; + case X509_V_ERR_PATH_LENGTH_EXCEEDED: + error = QSslError(QSslError::PathLengthExceeded, cert); break; + case X509_V_ERR_INVALID_PURPOSE: + error = QSslError(QSslError::InvalidPurpose, cert); break; + case X509_V_ERR_CERT_UNTRUSTED: + error = QSslError(QSslError::CertificateUntrusted, cert); break; + case X509_V_ERR_CERT_REJECTED: + error = QSslError(QSslError::CertificateRejected, cert); break; + default: + error = QSslError(QSslError::UnspecifiedError, cert); break; + } + return error; +} + +bool QSslSocketBackendPrivate::testConnection() +{ + Q_Q(QSslSocket); + + // Check if the connection has been established. Get all errors from the + // verification stage. + _q_sslErrorList()->mutex.lock(); + _q_sslErrorList()->errors.clear(); + int result = (mode == QSslSocket::SslClientMode) ? q_SSL_connect(ssl) : q_SSL_accept(ssl); + + const QList<QPair<int, int> > &lastErrors = _q_sslErrorList()->errors; + for (int i = 0; i < lastErrors.size(); ++i) { + const QPair<int, int> ¤tError = lastErrors.at(i); + // Initialize the peer certificate chain in order to find which certificate caused this error + if (configuration.peerCertificateChain.isEmpty()) + configuration.peerCertificateChain = STACKOFX509_to_QSslCertificates(q_SSL_get_peer_cert_chain(ssl)); + emit q->peerVerifyError(_q_OpenSSL_to_QSslError(currentError.first, + configuration.peerCertificateChain.value(currentError.second))); + if (q->state() != QAbstractSocket::ConnectedState) + break; + } + + errorList << lastErrors; + _q_sslErrorList()->mutex.unlock(); + + // Connection aborted during handshake phase. + if (q->state() != QAbstractSocket::ConnectedState) + return false; + + // Check if we're encrypted or not. + if (result <= 0) { + switch (q_SSL_get_error(ssl, result)) { + case SSL_ERROR_WANT_READ: + case SSL_ERROR_WANT_WRITE: + // The handshake is not yet complete. + break; + default: + // ### Handle errors better + q->setErrorString(QSslSocket::tr("Error during SSL handshake: %1").arg(SSL_ERRORSTR())); + q->setSocketError(QAbstractSocket::SslHandshakeFailedError); +#ifdef QSSLSOCKET_DEBUG + qDebug() << "QSslSocketBackendPrivate::testConnection: error!" << q->errorString(); +#endif + emit q->error(QAbstractSocket::SslHandshakeFailedError); + q->abort(); + } + return false; + } + + // Store the peer certificate and chain. For clients, the peer certificate + // chain includes the peer certificate; for servers, it doesn't. Both the + // peer certificate and the chain may be empty if the peer didn't present + // any certificate. + if (configuration.peerCertificateChain.isEmpty()) + configuration.peerCertificateChain = STACKOFX509_to_QSslCertificates(q_SSL_get_peer_cert_chain(ssl)); + X509 *x509 = q_SSL_get_peer_certificate(ssl); + configuration.peerCertificate = QSslCertificatePrivate::QSslCertificate_from_X509(x509); + q_X509_free(x509); + + // Start translating errors. + QList<QSslError> errors; + bool doVerifyPeer = configuration.peerVerifyMode == QSslSocket::VerifyPeer + || (configuration.peerVerifyMode == QSslSocket::AutoVerifyPeer + && mode == QSslSocket::SslClientMode); + + // Check the peer certificate itself. First try the subject's common name + // (CN) as a wildcard, then try all alternate subject name DNS entries the + // same way. + if (!configuration.peerCertificate.isNull()) { + // but only if we're a client connecting to a server + // if we're the server, don't check CN + if (mode == QSslSocket::SslClientMode) { + QString peerName = q->peerName(); + QString commonName = configuration.peerCertificate.subjectInfo(QSslCertificate::CommonName); + + QRegExp regexp(commonName, Qt::CaseInsensitive, QRegExp::Wildcard); + if (!regexp.exactMatch(peerName)) { + bool matched = false; + foreach (QString altName, configuration.peerCertificate + .alternateSubjectNames().values(QSsl::DnsEntry)) { + regexp.setPattern(altName); + if (regexp.exactMatch(peerName)) { + matched = true; + break; + } + } + if (!matched) { + // No matches in common names or alternate names. + QSslError error(QSslError::HostNameMismatch, configuration.peerCertificate); + errors << error; + emit q->peerVerifyError(error); + if (q->state() != QAbstractSocket::ConnectedState) + return false; + } + } + } + } else { + // No peer certificate presented. Report as error if the socket + // expected one. + if (doVerifyPeer) { + QSslError error(QSslError::NoPeerCertificate); + errors << error; + emit q->peerVerifyError(error); + if (q->state() != QAbstractSocket::ConnectedState) + return false; + } + } + + // Translate errors from the error list into QSslErrors. + for (int i = 0; i < errorList.size(); ++i) { + const QPair<int, int> &errorAndDepth = errorList.at(i); + int err = errorAndDepth.first; + int depth = errorAndDepth.second; + errors << _q_OpenSSL_to_QSslError(err, configuration.peerCertificateChain.value(depth)); + } + + if (!errors.isEmpty()) { + sslErrors = errors; + emit q->sslErrors(errors); + if (doVerifyPeer && !ignoreSslErrors) { + q->setErrorString(sslErrors.first().errorString()); + q->setSocketError(QAbstractSocket::SslHandshakeFailedError); + emit q->error(QAbstractSocket::SslHandshakeFailedError); + plainSocket->disconnectFromHost(); + return false; + } + } else { + sslErrors.clear(); + } + + // if we have a max read buffer size, reset the plain socket's to 1k + if (readBufferMaxSize) + plainSocket->setReadBufferSize(1024); + + connectionEncrypted = true; + emit q->encrypted(); + if (autoStartHandshake && pendingClose) { + pendingClose = false; + q->disconnectFromHost(); + } + return true; +} + +void QSslSocketBackendPrivate::disconnectFromHost() +{ + if (ssl) { + q_SSL_shutdown(ssl); + transmit(); + } + plainSocket->disconnectFromHost(); +} + +void QSslSocketBackendPrivate::disconnected() +{ + if (ssl) { + q_SSL_free(ssl); + ssl = 0; + } + if (ctx) { + q_SSL_CTX_free(ctx); + ctx = 0; + } +} + +QSslCipher QSslSocketBackendPrivate::sessionCipher() const +{ + if (!ssl || !ctx) + return QSslCipher(); + SSL_CIPHER *sessionCipher = q_SSL_get_current_cipher(ssl); + return sessionCipher ? QSslCipher_from_SSL_CIPHER(sessionCipher) : QSslCipher(); +} + +QList<QSslCertificate> QSslSocketBackendPrivate::STACKOFX509_to_QSslCertificates(STACK_OF(X509) *x509) +{ + ensureInitialized(); + QList<QSslCertificate> certificates; + for (int i = 0; i < q_sk_X509_num(x509); ++i) { + if (X509 *entry = q_sk_X509_value(x509, i)) + certificates << QSslCertificatePrivate::QSslCertificate_from_X509(entry); + } + return certificates; +} + +QT_END_NAMESPACE |