OpenSSL hangs during PKCS12 export with "Loading 'screen' into random state"

Please try to add winpty before oppenssl:

winpty openssl ...

or you can run a new bash wrapped by winpty:

winpty bash

In the windows console, there is some problem with terminal input/output so winpty can help if some software requires unix terminal behavior.

winpty helped me to run openssl in this environment:

git version 2.7.3.windows.1OpenSSL 1.0.2g  1 Mar 2016

windows ssl openssl git-bash

I found that I needed to specify the PFX password on the command line using -passout pass:SomePassword - e.g.:

openssl pkcs12 -export -out foo_example_com.pfx -inkey foo_example_com.key -in foo_example_com.crt -passout pass:Pa55w0rd

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