Hello,
I am developing an application that uses a patched version of openssl
which has engine support for musclecard. Attached is a simple patch for
libmusclecard-1.3.3 that I needed in order to successfully execute a
sequence of crypto operations with a smart card. The issue it attempts
to resolve is that the cached context is not invalidated after the
context is released. This causes MSCListTokens under at least the
following sequence:
- MSCListTokens is called
- MSCEstablishConnection is called
- RSA encryption or decryption
- MSCReleaseConnection is called
- MSCListTokens is called and fails
I am not sure if this is an appropriate fix or if there is some other
method of achieving it, but it works for me.
Any feedback is appreciated.
Cheers,
scott.
diff -pur libmusclecard-1.3.3/src/musclecard.c libmusclecard-1.3.3-cbn/src/musclecard.c
--- libmusclecard-1.3.3/src/musclecard.c 2006-03-21 14:22:06.000000000 -0500
+++ libmusclecard-1.3.3-cbn/src/musclecard.c 2006-06-14 15:18:58.000000000 -0400
@@ -607,6 +607,9 @@ MSC_RV MSCReleaseConnection(MSCLPTokenCo
rv = SCardReleaseContext(pConnection->hContext);
if (pcscToMSC(rv) != MSC_SUCCESS)
return pcscToMSC(rv);
+
+ if (pConnection->hContext == localHContext)
+ localHContext = 0;
}
pConnection->tokenLibHandle = 0;
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