diff options
Diffstat (limited to 'src/network/ssl/qsslcontext_openssl.cpp')
| -rw-r--r-- | src/network/ssl/qsslcontext_openssl.cpp | 457 |
1 files changed, 457 insertions, 0 deletions
diff --git a/src/network/ssl/qsslcontext_openssl.cpp b/src/network/ssl/qsslcontext_openssl.cpp new file mode 100644 index 0000000000..1f787b0da3 --- /dev/null +++ b/src/network/ssl/qsslcontext_openssl.cpp @@ -0,0 +1,457 @@ +/**************************************************************************** +** +** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies). +** Copyright (C) 2014 BlackBerry Limited. All rights reserved. +** Contact: http://www.qt-project.org/legal +** +** This file is part of the QtNetwork module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL21$ +** Commercial License Usage +** Licensees holding valid commercial Qt licenses may use this file in +** accordance with the commercial license agreement provided with the +** Software or, alternatively, in accordance with the terms contained in +** a written agreement between you and Digia. For licensing terms and +** conditions see http://qt.digia.com/licensing. For further information +** use the contact form at http://qt.digia.com/contact-us. +** +** 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 or version 3 as published by the Free +** Software Foundation and appearing in the file LICENSE.LGPLv21 and +** LICENSE.LGPLv3 included in the packaging of this file. Please review the +** following information to ensure the GNU Lesser General Public License +** requirements will be met: https://www.gnu.org/licenses/lgpl.html and +** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** In addition, as a special exception, Digia gives you certain additional +** rights. These rights are described in the Digia Qt LGPL Exception +** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + + +#include <QtNetwork/qsslsocket.h> +#include <QtCore/qmutex.h> + +#include "private/qsslcontext_openssl_p.h" +#include "private/qsslsocket_p.h" +#include "private/qsslsocket_openssl_p.h" +#include "private/qsslsocket_openssl_symbols_p.h" + +QT_BEGIN_NAMESPACE + +// defined in qsslsocket_openssl.cpp: +extern int q_X509Callback(int ok, X509_STORE_CTX *ctx); +extern QString getErrorsFromOpenSsl(); + +// Default DH params +// 1024-bit MODP Group with 160-bit Prime Order Subgroup +// From RFC 5114 +static unsigned const char dh1024_p[]={ + 0xB1,0x0B,0x8F,0x96,0xA0,0x80,0xE0,0x1D,0xDE,0x92,0xDE,0x5E, + 0xAE,0x5D,0x54,0xEC,0x52,0xC9,0x9F,0xBC,0xFB,0x06,0xA3,0xC6, + 0x9A,0x6A,0x9D,0xCA,0x52,0xD2,0x3B,0x61,0x60,0x73,0xE2,0x86, + 0x75,0xA2,0x3D,0x18,0x98,0x38,0xEF,0x1E,0x2E,0xE6,0x52,0xC0, + 0x13,0xEC,0xB4,0xAE,0xA9,0x06,0x11,0x23,0x24,0x97,0x5C,0x3C, + 0xD4,0x9B,0x83,0xBF,0xAC,0xCB,0xDD,0x7D,0x90,0xC4,0xBD,0x70, + 0x98,0x48,0x8E,0x9C,0x21,0x9A,0x73,0x72,0x4E,0xFF,0xD6,0xFA, + 0xE5,0x64,0x47,0x38,0xFA,0xA3,0x1A,0x4F,0xF5,0x5B,0xCC,0xC0, + 0xA1,0x51,0xAF,0x5F,0x0D,0xC8,0xB4,0xBD,0x45,0xBF,0x37,0xDF, + 0x36,0x5C,0x1A,0x65,0xE6,0x8C,0xFD,0xA7,0x6D,0x4D,0xA7,0x08, + 0xDF,0x1F,0xB2,0xBC,0x2E,0x4A,0x43,0x71 +}; + +static unsigned const char dh1024_g[]={ + 0xA4,0xD1,0xCB,0xD5,0xC3,0xFD,0x34,0x12,0x67,0x65,0xA4,0x42, + 0xEF,0xB9,0x99,0x05,0xF8,0x10,0x4D,0xD2,0x58,0xAC,0x50,0x7F, + 0xD6,0x40,0x6C,0xFF,0x14,0x26,0x6D,0x31,0x26,0x6F,0xEA,0x1E, + 0x5C,0x41,0x56,0x4B,0x77,0x7E,0x69,0x0F,0x55,0x04,0xF2,0x13, + 0x16,0x02,0x17,0xB4,0xB0,0x1B,0x88,0x6A,0x5E,0x91,0x54,0x7F, + 0x9E,0x27,0x49,0xF4,0xD7,0xFB,0xD7,0xD3,0xB9,0xA9,0x2E,0xE1, + 0x90,0x9D,0x0D,0x22,0x63,0xF8,0x0A,0x76,0xA6,0xA2,0x4C,0x08, + 0x7A,0x09,0x1F,0x53,0x1D,0xBF,0x0A,0x01,0x69,0xB6,0xA2,0x8A, + 0xD6,0x62,0xA4,0xD1,0x8E,0x73,0xAF,0xA3,0x2D,0x77,0x9D,0x59, + 0x18,0xD0,0x8B,0xC8,0x85,0x8F,0x4D,0xCE,0xF9,0x7C,0x2A,0x24, + 0x85,0x5E,0x6E,0xEB,0x22,0xB3,0xB2,0xE5 +}; + +static DH *get_dh1024() +{ + DH *dh = q_DH_new(); + if (!dh) + return 0; + + dh->p = q_BN_bin2bn(dh1024_p, sizeof(dh1024_p), 0); + dh->g = q_BN_bin2bn(dh1024_g, sizeof(dh1024_g), 0); + if (!dh->p || !dh->g) { + q_DH_free(dh); + return 0; + } + + return dh; +} + +QSslContext::QSslContext() + : ctx(0), + pkey(0), + session(0), + m_sessionTicketLifeTimeHint(-1) +{ +} + +QSslContext::~QSslContext() +{ + if (ctx) + // This will decrement the reference count by 1 and free the context eventually when possible + q_SSL_CTX_free(ctx); + + if (pkey) + q_EVP_PKEY_free(pkey); + + if (session) + q_SSL_SESSION_free(session); +} + +QSslContext* QSslContext::fromConfiguration(QSslSocket::SslMode mode, const QSslConfiguration &configuration, bool allowRootCertOnDemandLoading) +{ + QSslContext *sslContext = new QSslContext(); + sslContext->sslConfiguration = configuration; + sslContext->errorCode = QSslError::NoError; + + bool client = (mode == QSslSocket::SslClientMode); + + bool reinitialized = false; +init_context: + switch (sslContext->sslConfiguration.protocol()) { + case QSsl::SslV2: +#ifndef OPENSSL_NO_SSL2 + sslContext->ctx = q_SSL_CTX_new(client ? q_SSLv2_client_method() : q_SSLv2_server_method()); +#else + sslContext->ctx = 0; // SSL 2 not supported by the system, but chosen deliberately -> error +#endif + break; + case QSsl::SslV3: + sslContext->ctx = q_SSL_CTX_new(client ? q_SSLv3_client_method() : q_SSLv3_server_method()); + break; + case QSsl::SecureProtocols: // SslV2 will be disabled below + case QSsl::TlsV1SslV3: // SslV2 will be disabled below + case QSsl::AnyProtocol: + default: + sslContext->ctx = q_SSL_CTX_new(client ? q_SSLv23_client_method() : q_SSLv23_server_method()); + break; + case QSsl::TlsV1_0: + sslContext->ctx = q_SSL_CTX_new(client ? q_TLSv1_client_method() : q_TLSv1_server_method()); + break; + case QSsl::TlsV1_1: +#if OPENSSL_VERSION_NUMBER >= 0x10001000L + sslContext->ctx = q_SSL_CTX_new(client ? q_TLSv1_1_client_method() : q_TLSv1_1_server_method()); +#else + sslContext->ctx = 0; // TLS 1.1 not supported by the system, but chosen deliberately -> error +#endif + break; + case QSsl::TlsV1_2: +#if OPENSSL_VERSION_NUMBER >= 0x10001000L + sslContext->ctx = q_SSL_CTX_new(client ? q_TLSv1_2_client_method() : q_TLSv1_2_server_method()); +#else + sslContext->ctx = 0; // TLS 1.2 not supported by the system, but chosen deliberately -> error +#endif + break; + } + if (!sslContext->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; + } + + sslContext->errorStr = QSslSocket::tr("Error creating SSL context (%1)").arg(QSslSocketBackendPrivate::getErrorsFromOpenSsl()); + sslContext->errorCode = QSslError::UnspecifiedError; + return sslContext; + } + + // Enable bug workarounds. + long options = QSslSocketBackendPrivate::setupOpenSslOptions(configuration.protocol(), configuration.d->sslOptions); + q_SSL_CTX_set_options(sslContext->ctx, options); + +#if OPENSSL_VERSION_NUMBER >= 0x10000000L + // Tell OpenSSL to release memory early + // http://www.openssl.org/docs/ssl/SSL_CTX_set_mode.html + if (q_SSLeay() >= 0x10000000L) + q_SSL_CTX_set_mode(sslContext->ctx, SSL_MODE_RELEASE_BUFFERS); +#endif + + // Initialize ciphers + QByteArray cipherString; + int first = true; + QList<QSslCipher> ciphers = sslContext->sslConfiguration.ciphers(); + if (ciphers.isEmpty()) + ciphers = QSslSocketPrivate::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(sslContext->ctx, cipherString.data())) { + sslContext->errorStr = QSslSocket::tr("Invalid or empty cipher list (%1)").arg(QSslSocketBackendPrivate::getErrorsFromOpenSsl()); + sslContext->errorCode = QSslError::UnspecifiedError; + return sslContext; + } + + // Add all our CAs to this store. + foreach (const QSslCertificate &caCertificate, sslContext->sslConfiguration.caCertificates()) { + // From https://www.openssl.org/docs/ssl/SSL_CTX_load_verify_locations.html: + // + // If several CA certificates matching the name, key identifier, and + // serial number condition are available, only the first one will be + // examined. This may lead to unexpected results if the same CA + // certificate is available with different expiration dates. If a + // ``certificate expired'' verification error occurs, no other + // certificate will be searched. Make sure to not have expired + // certificates mixed with valid ones. + // + // See also: QSslSocketBackendPrivate::verify() + if (caCertificate.expiryDate() >= QDateTime::currentDateTime()) { + q_X509_STORE_add_cert(sslContext->ctx->cert_store, (X509 *)caCertificate.handle()); + } + } + + if (QSslSocketPrivate::s_loadRootCertsOnDemand && allowRootCertOnDemandLoading) { + // tell OpenSSL the directories where to look up the root certs on demand + QList<QByteArray> unixDirs = QSslSocketPrivate::unixRootCertDirectories(); + for (int a = 0; a < unixDirs.count(); ++a) + q_SSL_CTX_load_verify_locations(sslContext->ctx, 0, unixDirs.at(a).constData()); + } + + if (!sslContext->sslConfiguration.localCertificate().isNull()) { + // Require a private key as well. + if (sslContext->sslConfiguration.privateKey().isNull()) { + sslContext->errorStr = QSslSocket::tr("Cannot provide a certificate with no key, %1").arg(QSslSocketBackendPrivate::getErrorsFromOpenSsl()); + sslContext->errorCode = QSslError::UnspecifiedError; + return sslContext; + } + + // Load certificate + if (!q_SSL_CTX_use_certificate(sslContext->ctx, (X509 *)sslContext->sslConfiguration.localCertificate().handle())) { + sslContext->errorStr = QSslSocket::tr("Error loading local certificate, %1").arg(QSslSocketBackendPrivate::getErrorsFromOpenSsl()); + sslContext->errorCode = QSslError::UnspecifiedError; + return sslContext; + } + + if (configuration.d->privateKey.algorithm() == QSsl::Opaque) { + sslContext->pkey = reinterpret_cast<EVP_PKEY *>(configuration.d->privateKey.handle()); + } else { + // Load private key + sslContext->pkey = q_EVP_PKEY_new(); + // before we were using EVP_PKEY_assign_R* functions and did not use EVP_PKEY_free. + // this lead to a memory leak. Now we use the *_set1_* functions which do not + // take ownership of the RSA/DSA key instance because the QSslKey already has ownership. + if (configuration.d->privateKey.algorithm() == QSsl::Rsa) + q_EVP_PKEY_set1_RSA(sslContext->pkey, reinterpret_cast<RSA *>(configuration.d->privateKey.handle())); + else + q_EVP_PKEY_set1_DSA(sslContext->pkey, reinterpret_cast<DSA *>(configuration.d->privateKey.handle())); + } + + if (!q_SSL_CTX_use_PrivateKey(sslContext->ctx, sslContext->pkey)) { + sslContext->errorStr = QSslSocket::tr("Error loading private key, %1").arg(QSslSocketBackendPrivate::getErrorsFromOpenSsl()); + sslContext->errorCode = QSslError::UnspecifiedError; + return sslContext; + } + if (configuration.d->privateKey.algorithm() == QSsl::Opaque) + sslContext->pkey = 0; // Don't free the private key, it belongs to QSslKey + + // Check if the certificate matches the private key. + if (!q_SSL_CTX_check_private_key(sslContext->ctx)) { + sslContext->errorStr = QSslSocket::tr("Private key does not certify public key, %1").arg(QSslSocketBackendPrivate::getErrorsFromOpenSsl()); + sslContext->errorCode = QSslError::UnspecifiedError; + return sslContext; + } + + // If we have any intermediate certificates then we need to add them to our chain + bool first = true; + foreach (const QSslCertificate &cert, configuration.d->localCertificateChain) { + if (first) { + first = false; + continue; + } + q_SSL_CTX_ctrl(sslContext->ctx, SSL_CTRL_EXTRA_CHAIN_CERT, 0, + q_X509_dup(reinterpret_cast<X509 *>(cert.handle()))); + } + } + + // Initialize peer verification. + if (sslContext->sslConfiguration.peerVerifyMode() == QSslSocket::VerifyNone) { + q_SSL_CTX_set_verify(sslContext->ctx, SSL_VERIFY_NONE, 0); + } else { + q_SSL_CTX_set_verify(sslContext->ctx, SSL_VERIFY_PEER, q_X509Callback); + } + + // Set verification depth. + if (sslContext->sslConfiguration.peerVerifyDepth() != 0) + q_SSL_CTX_set_verify_depth(sslContext->ctx, sslContext->sslConfiguration.peerVerifyDepth()); + + // set persisted session if the user set it + if (!configuration.sessionTicket().isEmpty()) + sslContext->setSessionASN1(configuration.sessionTicket()); + + // Set temp DH params + DH *dh = 0; + dh = get_dh1024(); + q_SSL_CTX_set_tmp_dh(sslContext->ctx, dh); + q_DH_free(dh); + +#ifndef OPENSSL_NO_EC + // Set temp ECDH params + EC_KEY *ecdh = 0; + ecdh = q_EC_KEY_new_by_curve_name(NID_X9_62_prime256v1); + q_SSL_CTX_set_tmp_ecdh(sslContext->ctx, ecdh); + q_EC_KEY_free(ecdh); +#endif // OPENSSL_NO_EC + + return sslContext; +} + +#if OPENSSL_VERSION_NUMBER >= 0x1000100fL && !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG) + +static int next_proto_cb(SSL *, unsigned char **out, unsigned char *outlen, + const unsigned char *in, unsigned int inlen, void *arg) +{ + QSslContext::NPNContext *ctx = reinterpret_cast<QSslContext::NPNContext *>(arg); + + // comment out to debug: +// QList<QByteArray> supportedVersions; +// for (unsigned int i = 0; i < inlen; ) { +// QByteArray version(reinterpret_cast<const char *>(&in[i+1]), in[i]); +// supportedVersions << version; +// i += in[i] + 1; +// } + + int proto = q_SSL_select_next_proto(out, outlen, in, inlen, ctx->data, ctx->len); + switch (proto) { + case OPENSSL_NPN_UNSUPPORTED: + ctx->status = QSslConfiguration::NextProtocolNegotiationNone; + break; + case OPENSSL_NPN_NEGOTIATED: + ctx->status = QSslConfiguration::NextProtocolNegotiationNegotiated; + break; + case OPENSSL_NPN_NO_OVERLAP: + ctx->status = QSslConfiguration::NextProtocolNegotiationUnsupported; + break; + default: + qWarning("OpenSSL sent unknown NPN status"); + } + + return SSL_TLSEXT_ERR_OK; +} + +QSslContext::NPNContext QSslContext::npnContext() const +{ + return m_npnContext; +} +#endif // OPENSSL_VERSION_NUMBER >= 0x1000100fL ... + +// Needs to be deleted by caller +SSL* QSslContext::createSsl() +{ + SSL* ssl = q_SSL_new(ctx); + q_SSL_clear(ssl); + + if (!session && !sessionASN1().isEmpty() + && !sslConfiguration.testSslOption(QSsl::SslOptionDisableSessionPersistence)) { + const unsigned char *data = reinterpret_cast<const unsigned char *>(m_sessionASN1.constData()); + session = q_d2i_SSL_SESSION(0, &data, m_sessionASN1.size()); // refcount is 1 already, set by function above + } + + if (session) { + // Try to resume the last session we cached + if (!q_SSL_set_session(ssl, session)) { + qWarning("could not set SSL session"); + q_SSL_SESSION_free(session); + session = 0; + } + } + +#if OPENSSL_VERSION_NUMBER >= 0x1000100fL && !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG) + QList<QByteArray> protocols = sslConfiguration.d->nextAllowedProtocols; + if (!protocols.isEmpty()) { + m_supportedNPNVersions.clear(); + for (int a = 0; a < protocols.count(); ++a) { + if (protocols.at(a).size() > 255) { + qWarning() << "TLS NPN extension" << protocols.at(a) + << "is too long and will be truncated to 255 characters."; + protocols[a] = protocols.at(a).left(255); + } + m_supportedNPNVersions.append(protocols.at(a).size()).append(protocols.at(a)); + } + m_npnContext.data = reinterpret_cast<unsigned char *>(m_supportedNPNVersions.data()); + m_npnContext.len = m_supportedNPNVersions.count(); + m_npnContext.status = QSslConfiguration::NextProtocolNegotiationNone; + q_SSL_CTX_set_next_proto_select_cb(ctx, next_proto_cb, &m_npnContext); + } +#endif // OPENSSL_VERSION_NUMBER >= 0x1000100fL ... + + return ssl; +} + +// We cache exactly one session here +bool QSslContext::cacheSession(SSL* ssl) +{ + // don't cache the same session again + if (session && session == q_SSL_get_session(ssl)) + return true; + + // decrease refcount of currently stored session + // (this might happen if there are several concurrent handshakes in flight) + if (session) + q_SSL_SESSION_free(session); + + // cache the session the caller gave us and increase reference count + session = q_SSL_get1_session(ssl); + + if (session && !sslConfiguration.testSslOption(QSsl::SslOptionDisableSessionPersistence)) { + int sessionSize = q_i2d_SSL_SESSION(session, 0); + if (sessionSize > 0) { + m_sessionASN1.resize(sessionSize); + unsigned char *data = reinterpret_cast<unsigned char *>(m_sessionASN1.data()); + if (!q_i2d_SSL_SESSION(session, &data)) + qWarning("could not store persistent version of SSL session"); + m_sessionTicketLifeTimeHint = session->tlsext_tick_lifetime_hint; + } + } + + return (session != 0); +} + +QByteArray QSslContext::sessionASN1() const +{ + return m_sessionASN1; +} + +void QSslContext::setSessionASN1(const QByteArray &session) +{ + m_sessionASN1 = session; +} + +int QSslContext::sessionTicketLifeTimeHint() const +{ + return m_sessionTicketLifeTimeHint; +} + +QSslError::SslError QSslContext::error() const +{ + return errorCode; +} + +QString QSslContext::errorString() const +{ + return errorStr; +} + +QT_END_NAMESPACE |