Handling of certificate user tokens with OPC UA
Posted: 19 Apr 2012, 10:47
The following code provides an example for using certificate user tokens in an OPC UA client with the C++ SDK
Code: Select all
UaStatus ret;
UaSession* pSession;
UaString sUrl;
UaString sCertificateFile; // Set path and file name for public key
UaString sPrivateKeyFile; // Set path and file name for private key
SessionConnectInfo connectInfo;
SessionSecurityInfo securityInfo;
UaPkiCertificate userCertificate = UaPkiCertificate::fromDERFile(sCertificateFile.toUtf8());
UaPkiRsaKeyPair userPrivateKey = UaPkiRsaKeyPair::fromPEMFile(sPrivateKeyFile.toUtf8(), OpcUa_Null);
if (userCertificate.isNull())
{
// Error handling
}
if (!userPrivateKey.isValid())
{
// Error handling
}
UaByteArray baUserCertificate = userCertificate.toDER();
UaByteArray baUserPrivateKey = userPrivateKey.toDER();
UaByteString bsUserCertificate(baUserCertificate.size(), (OpcUa_Byte*)baUserCertificate.data());
UaByteString bsUserPrivateKey(baUserPrivateKey.size(), (OpcUa_Byte*)baUserPrivateKey.data());
securityInfo.setCertificateUserIdentity(bsUserCertificate, bsUserPrivateKey);
// Connect to server with certificate as user token
ret = pSession->connect(sUrl, connectInfo, securityInfo, g_pCallback);