Fix binary incompatibility between openssl versions

OpenSSL changed the layout of X509_STORE_CTX between 0.9 and 1.0
So we have to consider this struct as private implementation, and use
the access functions instead.

This bug would cause certificate verification problems if a different
version of openssl is loaded at runtime to the headers Qt was compiled
against.

Task-number: QTBUG-28343
Change-Id: I47fc24336f7d9c80f08f9c8ba6debc51a5591258
Reviewed-by: Richard J. Moore <rich@kde.org>

3 files changed, 15 insertions, 3 deletions

diff --git a/src/network/ssl/qsslsocket_openssl.cpp b/src/network/ssl/qsslsocket_openssl.cpp
index 39b49ce09e..9e0331391b 100644
--- a/src/network/ssl/qsslsocket_openssl.cpp
+++ b/src/network/ssl/qsslsocket_openssl.cpp
@@ -229,12 +229,12 @@ 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);
+        _q_sslErrorList()->errors << qMakePair<int, int>(q_X509_STORE_CTX_get_error(ctx), q_X509_STORE_CTX_get_error_depth(ctx));
 #ifdef QSSLSOCKET_DEBUG
         qDebug() << "verification error: dumping bad certificate";
-        qDebug() << QSslCertificatePrivate::QSslCertificate_from_X509(ctx->current_cert).toPem();
+        qDebug() << QSslCertificatePrivate::QSslCertificate_from_X509(q_X509_STORE_CTX_get_current_cert(ctx)).toPem();
         qDebug() << "dumping chain";
-        foreach (QSslCertificate cert, QSslSocketBackendPrivate::STACKOFX509_to_QSslCertificates(ctx->chain)) {
+        foreach (QSslCertificate cert, QSslSocketBackendPrivate::STACKOFX509_to_QSslCertificates(q_X509_STORE_CTX_get_chain(ctx))) {
             QString certFormat(QStringLiteral("O=%1 CN=%2 L=%3 OU=%4 C=%5 ST=%6"));
             qDebug() << "Issuer:" << "O=" << cert.issuerInfo(QSslCertificate::Organization)
                 << "CN=" << cert.issuerInfo(QSslCertificate::CommonName)
diff --git a/src/network/ssl/qsslsocket_openssl_symbols.cpp b/src/network/ssl/qsslsocket_openssl_symbols.cpp
index eeae9d461f..0df77b07f7 100644
--- a/src/network/ssl/qsslsocket_openssl_symbols.cpp
+++ b/src/network/ssl/qsslsocket_openssl_symbols.cpp
@@ -294,6 +294,10 @@ DEFINEFUNC2(int, X509_STORE_add_cert, X509_STORE *a, a, X509 *b, b, return 0, re
 DEFINEFUNC(void, X509_STORE_CTX_free, X509_STORE_CTX *a, a, return, DUMMYARG)
 DEFINEFUNC4(int, X509_STORE_CTX_init, X509_STORE_CTX *a, a, X509_STORE *b, b, X509 *c, c, STACK_OF(X509) *d, d, return -1, return)
 DEFINEFUNC2(int, X509_STORE_CTX_set_purpose, X509_STORE_CTX *a, a, int b, b, return -1, return)
+DEFINEFUNC(int, X509_STORE_CTX_get_error, X509_STORE_CTX *a, a, return -1, return)
+DEFINEFUNC(int, X509_STORE_CTX_get_error_depth, X509_STORE_CTX *a, a, return -1, return)
+DEFINEFUNC(X509 *, X509_STORE_CTX_get_current_cert, X509_STORE_CTX *a, a, return 0, return)
+DEFINEFUNC(STACK_OF(X509) *, X509_STORE_CTX_get_chain, X509_STORE_CTX *a, a, return 0, return)
 DEFINEFUNC(X509_STORE_CTX *, X509_STORE_CTX_new, DUMMYARG, DUMMYARG, return 0, return)
 #ifdef SSLEAY_MACROS
 DEFINEFUNC2(int, i2d_DSAPrivateKey, const DSA *a, a, unsigned char **b, b, return -1, return)
@@ -714,6 +718,10 @@ bool q_resolveOpenSslSymbols()
     RESOLVEFUNC(X509_STORE_CTX_init)
     RESOLVEFUNC(X509_STORE_CTX_new)
     RESOLVEFUNC(X509_STORE_CTX_set_purpose)
+    RESOLVEFUNC(X509_STORE_CTX_get_error)
+    RESOLVEFUNC(X509_STORE_CTX_get_error_depth)
+    RESOLVEFUNC(X509_STORE_CTX_get_current_cert)
+    RESOLVEFUNC(X509_STORE_CTX_get_chain)
     RESOLVEFUNC(X509_cmp)
 #ifndef SSLEAY_MACROS
     RESOLVEFUNC(X509_dup)
diff --git a/src/network/ssl/qsslsocket_openssl_symbols_p.h b/src/network/ssl/qsslsocket_openssl_symbols_p.h
index 40c6522d93..2be84331e3 100644
--- a/src/network/ssl/qsslsocket_openssl_symbols_p.h
+++ b/src/network/ssl/qsslsocket_openssl_symbols_p.h
@@ -398,6 +398,10 @@ int q_X509_STORE_CTX_init(X509_STORE_CTX *ctx, X509_STORE *store,
                           X509 *x509, STACK_OF(X509) *chain);
 X509_STORE_CTX *q_X509_STORE_CTX_new();
 int q_X509_STORE_CTX_set_purpose(X509_STORE_CTX *ctx, int purpose);
+int q_X509_STORE_CTX_get_error(X509_STORE_CTX *ctx);
+int q_X509_STORE_CTX_get_error_depth(X509_STORE_CTX *ctx);
+X509 *q_X509_STORE_CTX_get_current_cert(X509_STORE_CTX *ctx);
+STACK_OF(X509) *q_X509_STORE_CTX_get_chain(X509_STORE_CTX *ctx);
 
 #define q_BIO_get_mem_data(b, pp) (int)q_BIO_ctrl(b,BIO_CTRL_INFO,0,(char *)pp)
 #define q_BIO_pending(b) (int)q_BIO_ctrl(b,BIO_CTRL_PENDING,0,NULL)