[stunnel-users] CAPI_GET_KEY:cryptacquirecontext error

Dear stunnel users,

whereas Stunnel itself looks fine for me, it seems to have some troubles with CAPI engine. The one I cannot manage still is *"CAPI_GET_KEY:cryptacquirecontext error"* logged when attempting to export the client's key.

I tried to add *"engineCtrl = csp_name:Microsoft Enhanced RSA and AES Cryptographic Provider"* to stunnel.conf, and then *"CAPI_**CTX_SET_PROVNAME:**cryptacquirecontext error"* was logged instead of the above one.

The same certificate is used happily with no-capi configuration. I suppose the problem is somehow related to sha256 signature in the certificate. Are there any chances to workaround?

Stunnel version is 5.48 with OpenSSL 1.0.2o-fips. (in this very case I need to use 32bit version, so no possibility to upgrade).

Thanks!