Stumbled on this thread while investigating a problem similar.
Running almost the exact same code, I have discovered that encrypting with certain keys work, and certain keys hang.
I've traced the hang to ElGamal.pm, in a loop starting on line 59, the condition for exit is never satisfied -with some keys-.
While (1) {
last if Math::BigInt::bgcd($k, $p_minus1) == 1;
k++;
}
Not even remotely sure how to resolve.
-Darryl
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