# Decrypt data before decoding
**URL:** https://discuss.elastic.co/t/decrypt-data-before-decoding/86295
**Category:** Logstash
**Created:** [May 18, 2017, 3:28pm UTC](https://discuss.elastic.co/t/decrypt-data-before-decoding/86295 "2017-05-18T15:28:33Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@pollux](https://discuss.elastic.co/u/pollux)
#### Post date: [May 18, 2017, 3:28pm UTC](https://discuss.elastic.co/t/decrypt-data-before-decoding/86295/1 "2017-05-18T15:28:34Z")
Hi,
I need to fetch file from ftp. Last time I checked, logstash didn't have an input plug-in for ftp. So I'll mount the ftp and logstash will read from file.
The real thing is, can I said to logstash "ok read this file, pass it to openssl with this options (decrypt it), then decode it as a json". Is it doable ?
My question is, I think, about chaining filter (but maybe I am wrong)
In advance thanks, Rémi
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### Author:  [@magnusbaeck](https://discuss.elastic.co/u/magnusbaeck)
#### Post date: [May 23, 2017, 3:52am UTC](https://discuss.elastic.co/t/decrypt-data-before-decoding/86295/2 "2017-05-23T03:52:46Z")
Perhaps surprisingly I don't think anybody has written a filter that passes events through a child process which is what you'd need here. However, you could use a ruby filter to do that if you're able and willing to write some code.
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### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [June 20, 2017, 3:52am UTC](https://discuss.elastic.co/t/decrypt-data-before-decoding/86295/3 "2017-06-20T03:52:48Z")
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