Issue 623 : Make BaseFont subset prefix generation deterministic #627
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Added a configurable SecureRandom to BaseFont class to make a possibility to generate a deterministic subset prefix.
By default the generated String is still random.
Related Issue: #623
Unit test is provided within the commit. Tested within our implementation using a FixedSecureRandom from BC, and the generated subset prefix is deterministic, as expected.
Some comments:
I do not understand a reason for the method PdfReader.shuffleSubsetNames(). To my opinion, it could be removed, as if you remove it from code, it does not brake any unit tests. Nevertheless, I left this method with the old behavior for backward compatibility.
My solution is pretty simple and straight-forward, so if you have better ideas how it could be implemented, please feel free to make the changes in my original PR.
Best regards,
Aleksandr.