1 files changed, 8 insertions, 0 deletions
diff --git a/Swiften/TLS/OpenSSL/OpenSSLCertificate.cpp b/Swiften/TLS/OpenSSL/OpenSSLCertificate.cpp
index 8d2d965..bb51428 100644
--- a/Swiften/TLS/OpenSSL/OpenSSLCertificate.cpp
+++ b/Swiften/TLS/OpenSSL/OpenSSLCertificate.cpp
@@ -31,18 +31,26 @@ OpenSSLCertificate::OpenSSLCertificate(const ByteArray& der) {
     const unsigned char* p = vecptr(der);
 #endif
     cert = std::shared_ptr<X509>(d2i_X509(nullptr, &p, der.size()), X509_free);
     if (!cert) {
         SWIFT_LOG(warning) << "Error creating certificate from DER data" << std::endl;
     }
     parse();
 }
 
+void OpenSSLCertificate::incrementReferenceCount() const {
+#if OPENSSL_VERSION_NUMBER >= 0x10100000L
+    X509_up_ref(cert.get());
+#else
+    CRYPTO_add(&(cert.get()->references), 1, CRYPTO_LOCK_EVP_PKEY);
+#endif
+}
+
 ByteArray OpenSSLCertificate::toDER() const {
     ByteArray result;
     if (!cert) {
         return result;
     }
     result.resize(i2d_X509(cert.get(), nullptr));
     unsigned char* p = vecptr(result);
     i2d_X509(cert.get(), &p);
     return result;