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16:44, EET
January 19, 2015
Offline
(We made a simple java desktop client (opcBasic) with Prosys SDK. It worked fine on windows thanks..)
I tried to build the same applikation on android system. It doesn’t work correctly, it throws exception (SecureIdentityException e1- see source code below):
exception: “Cannot create certificate for application”
(try-catch bloks are required only on Android)
try {
identity = ApplicationIdentity.loadOrCreateCertificate(appDescription, “Sample Organisation”,
/*Private Key Password */”opcua”,
/* Key File Path */privatePath,
/* CA certificate & private key */issuerCertificate,
/* Key Sizes for instance certificates to create */keySizes,
/* Enable renewing the certificate */true);
} catch (SecureIdentityException e1) {
e1.printStackTrace();
} catch (IOException e1) {
e1.printStackTrace();
}
Parameter Values:
on Windows:
privatePath: PKI\CA\private
appDescription:ApplicationDescription: ApplicationDescription (id=2129670906)
DiscoveryUrls=null
DiscoveryProfileUri=null
GatewayServerUri=null
ProductUri=null
ApplicationUri=null
ApplicationType=null
ApplicationName={class org.opcfoundation.ua.builtintypes.LocalizedText}(en) opcBasic
issuerCertificate: null
keySizes: null
———————————————————————————————
on Android:
privatePath: PKI/CA/private
appDescription: ApplicationDescription: ApplicationDescription (id=1100650048)
DiscoveryUrls=null
DiscoveryProfileUri=null
GatewayServerUri=null
ProductUri=null
ApplicationUri=null
ApplicationType=null
ApplicationName={class org.opcfoundation.ua.builtintypes.LocalizedText}(en) opcBasic
issuerCertificate: null
keySizes: null
Thanks in advanced!
Have you ever come accross such a problem like this before?
8:44, EET
December 21, 2011
Offline
There is a known issue that might affect this. The Private Key of the application can be stored in PEM format on the sdcard (ExternalStorage), but not in the internal storage. So, check that the Key File Path in the ApplicationIdentity.loadOrCreateCertificate() call points to the sdcard.
17:01, EET
January 19, 2015
Offline
Is it really necessary to use certificates? If not, than how do you avoid in your OPC Android client app to use them?
11:52, EET
December 21, 2011
Offline
No it’s not. If you connect without security, the certificates are not used. You can initialise the ApplicationIdentity without the certificates simply as
identity.setApplicationDescription(appDescription);
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