Disable key length limits if SHA function will be used

[arixmkii]

• Allowing keys longer than 16 symbols if SHA function is used

  • If SHA function is used, then there is no requirement to limit key length (similar as with well known PBE implementations).

• Bugfixes

  • v1 code was written to not use IV, but opted for CTR. This is like impossible combination, the only path without IV is ECB. So, it was changed to ECB with padding "aka" default "AES". There was no sample of old value, so, the choice of ECB with padding default is a guess.

• New tests

  • For longer keys input.
  • For verifying that IV allows to generate different encoded values with every call.

• Backward compatibility tests

  • For restored v1 decryption and v0 decryption (encrypted values generated with reverse engineering).

[coveralls]

Coverage increased (+19.3%) to 76.471% when pulling 15f9be2 on arixmkii:longer_key_support into 8224045 on evolution-gaming:master.

[mikla]

@t3hnar could you please have a look? It hangs open for a month+ already.