crypto: decode missing passphrase errors
When a user attempts to load an encrypted key without supplying a passphrase, a cryptic OpenSSL error is thrown. This change intercepts the OpenSSL error and throws a nice error code instead.
I would prefer to treat this as semver-minor.
cc @nodejs/crypto
Checklist
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make -j4 test
(UNIX), orvcbuild test
(Windows) passes -
tests and/or benchmarks are included -
documentation is changed or added -
commit message follows commit guidelines