undefined symbol: C_Initialize about pkcs11interop

[jariq]

I guess you've hit one of a few limitations of the current pkcs11interop implementation (please see section "Supported features" on www.pkcs11interop.net for more info) specifically that unmanaged libraries that export only C_GetFunctionList() function are supported only on MS Windows platform. And unfortunately opensc-pkcs11.so is one of those libraries as you can see in its source code: https://github.com/OpenSC/OpenSC/blob/master/src/pkcs11/opensc-pkcs11.exports

This limitation exists because of the marshaling problem (probably bug) in Mono. I am planning to create test case and bug report for Mono next week, but it can take long time till it gets fixed there. So meanwhile you can try to use something like "proxy PKCS#11 library" that exports all PKCS#11 functions directly and put it in front of the opensc-pkcs11.so. Please take a look at my other project pkcs11-logger that implements such library: https://github.com/jariq/pkcs11-logger

You should be able to easily create following setup which should work even on linux:

Your application <---> pkcs11interop.dll <---> pkcs11-logger.so <---> opensc-pkcs11.so

[vanhonit]

Thanks for feedback, I will try. But another question how to you pkcs11-logger know where opensc-pkcs11 save ?

[jariq]

By default logger tries to load PKCS#11 library provided by OpenSC project which is "opensc-pkcs11.dll" on Windows or "opensc-pkcs11.so" on Linux. But you can use PKCS11_LOGGER_ORIG_LIB environment variable to specify another library.

This is the "classic" way to use Pkcs11interop:

using (Pkcs11 pkcs11 = new Pkcs11("opensc-pkcs11.so", true))
{
// Do something interesting
}

This is how you use Pkcs11Interop with pkcs11-logger:

Environment.SetEnvironmentVariable("PKCS11_LOGGER_ORIG_LIB", "opensc-pkcs11.so");
using (Pkcs11 pkcs11 = new Pkcs11("pkcs11-logger.so", true))
{
// Do something interesting
}

[vanhonit]

Thanks, jariq !

[jariq]

I've found a workaround for this issue and the fix was committed to the master git repository few minutes ago. From now on you don't have to use pkcs11-logger as a proxy library. Latest development version can be downloaded from https://github.com/jariq/Pkcs11Interop/archive/master.zip