Operation request: CTX1 encode/decode

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Summary

Operations to encode and decode Citrix CTX1 passwords.

More info here:
https://www.reddit.com/r/AskNetsec/comments/1s3r6y/citrix_ctx1_hash_decoding/
https://www.remkoweijnen.nl/blog/2012/05/13/encoding-and-decoding-citrix-passwords/

Example

hash: PFFAJEDBOHECJEDBODEGIMCJPOFLJKDPKLAO
plaintext: Password1

[n1474335]

Closed in #428