From 7fcb100bbf6e8482039f915a9df93d951f7d52e6 Mon Sep 17 00:00:00 2001 From: Andy Shaw Date: Wed, 14 Jan 2015 22:47:55 +0100 Subject: Ignore expired certificate during certificate validation OpenSSL has a bug when validating a chain with two certificates. If a certificate exists twice (which is a valid use case for renewed CAs), and the first one it hits is expired (which depends on the order on data structure internal to OpenSSL), it will fail to validate the chain. This is only a bandaid fix, which trades improved chain validation for error reporting accuracy. However given that reissuing of CA certs is a real problem that is only getting worse, this fix is needed. See also: https://www.openssl.org/docs/ssl/SSL_CTX_load_verify_locations.html#WARNINGS [ChangeLog][QtNetwork][QSslSocket] Added a workaround to an OpenSSL problem that may cause errors when the trust store contains two certificates of the issuing CA, one of which is expired. Task-number: QTBUG-38896 (cherry picked and adapted from qtbase/0065b55da42b8c6ee0095264b5275fb708887c9d) Change-Id: I2515d79a442bec96734ea88ea850e6e8c2123a6c Reviewed-by: Richard J. Moore --- src/network/ssl/qsslsocket_openssl.cpp | 31 ++++++++++++------------------- 1 file changed, 12 insertions(+), 19 deletions(-) (limited to 'src') diff --git a/src/network/ssl/qsslsocket_openssl.cpp b/src/network/ssl/qsslsocket_openssl.cpp index 0ea174e3be..5fe55d59a2 100644 --- a/src/network/ssl/qsslsocket_openssl.cpp +++ b/src/network/ssl/qsslsocket_openssl.cpp @@ -350,26 +350,19 @@ init_context: } // Add all our CAs to this store. - QList expiredCerts; foreach (const QSslCertificate &caCertificate, q->caCertificates()) { - // add expired certs later, so that the - // valid ones are used before the expired ones - if (! caCertificate.isValid()) { - expiredCerts.append(caCertificate); - } else { - q_X509_STORE_add_cert(ctx->cert_store, (X509 *)caCertificate.handle()); - } - } - - bool addExpiredCerts = true; -#if defined(Q_OS_MAC) && (MAC_OS_X_VERSION_MAX_ALLOWED == MAC_OS_X_VERSION_10_5) - //On Leopard SSL does not work if we add the expired certificates. - if (QSysInfo::MacintoshVersion == QSysInfo::MV_10_5) - addExpiredCerts = false; -#endif - // now add the expired certs - if (addExpiredCerts) { - foreach (const QSslCertificate &caCertificate, expiredCerts) { + // 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: QSslContext::fromConfiguration() + if (caCertificate.expiryDate() >= QDateTime::currentDateTime()) { q_X509_STORE_add_cert(ctx->cert_store, (X509 *)caCertificate.handle()); } } -- cgit v1.2.3