public interface Advapi32 extends Library {
    public Advapi32 INST = (Advapi32) Native.loadLibrary("advapi32", Advapi32.class);
...
    public boolean CryptAcquireContextA(
            PointerByReference prov,
            String pszContainer,
            String pszProvider,
            int dwProvType,
            int dwFlags);

    public boolean CryptGetProvParam(
    		PointerByReference prov,
    		int dwParam,
    		byte[] pbData,
    		IntByReference dwDataLen,
    		int dwFlags
    		);
}

public Object[] GetReaderNames()
	{
		 int BUFFSIZE = 512;
		 ArrayList readernames = new ArrayList();
		 IntByReference pdwDataLen = new IntByReference();

		 PointerByReference provRef = new PointerByReference();
		 boolean result = Advapi32.INST.CryptAcquireContextA(provRef, null, null, provType,
					Advapi32.CRYPT_VERIFYCONTEXT);		 
		 int dwFlags = Advapi32.CRYPT_FIRST;

		 Advapi32.INST.CryptGetProvParam(provRef, 114, null, pdwDataLen, dwFlags);
		 BUFFSIZE = (int)(2 * pdwDataLen.getValue());
		 byte[] sb = new byte[BUFFSIZE];

		 /* ---------- Get KeyContainer Names ------------- */
		 while (Advapi32.INST.CryptGetProvParam(provRef, Advapi32.PP_ENUMREADERS, sb, pdwDataLen, dwFlags))
		 {
		 dwFlags = 0; //required to continue entire enumeration
		 readernames.add(sb.toString());
		 }
		 if (provRef.getValue() != Pointer.NULL){
			 Advapi32.INST.CryptReleaseContext(provRef.getValue(), 0);
		 }
	
		 if (readernames.size() == 0)
			 readernames.add("0 штук");
	
		 return readernames.toArray();
	 }