Getting Data In
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Encrypt data during anonymization

Path Finder

Referring to instruction of anonymization in page bellow:

http://docs.splunk.com/Documentation/Splunk/latest/Data/Anonymizedatausingconfigurationfiles

During indexing, instead of replacing a field value with literals, I would like to apply a function on it (for example encrypt it)

[session-anonymizer]
REGEX = (?m)^(.*)SessionId=\w+(\w{4}[&"].*)$
FORMAT = $1SessionId=########$2
DEST_KEY = _raw

For example instead of replacing SessionId=3A1785URH117BEA with SessionId=######## , I would like to replace it with a runtime value result of applying a function (like encryption function ).

This way I'll have a mechanism to get the original values if needed.

Has anybody come up with a solution for that.
Thanks

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Re: Encrypt data during anonymization

Esteemed Legend

You are going to have to do this with a pre-parser (outside of Splunk); it is pretty easy.

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Re: Encrypt data during anonymization

Communicator

You mean: log.txt -> postprocessed to -> logprocessed.txt -> indexing only logprocessed.txt files ?

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Re: Encrypt data during anonymization

Esteemed Legend

Yes, exactly.

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Re: Encrypt data during anonymization

Path Finder

Well, it works when batch processing files. But in case of real time monitoring files or TCP/UDP it is ideal to leave encryption to Splunk.

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Re: Encrypt data during anonymization

Path Finder

How do you do this in Splunk? I can't find any encryption function.

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Re: Encrypt data during anonymization

New Member

I am also searching for something similar. My requirement is I should be able to decrypt fields or rex pattern by supplying "KEY" on the search box . I did some search and found the best way to do is to write custom search command and feed the search result to this search command by eval function. The underlining decryption may be written in python sdk using mapper.

Please let me know

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Re: Encrypt data during anonymization

Contributor

Splunk 6.6 introduced cryptographic functions md5() sha1() etc.

You can encrypt fields at index time using these functions along with INGEST_EVAL.

You can also use calculated fields in props.conf to encrypt fields at search time. But one can easily view the source of the log data to see unencrypted values if done at search time.

See: https://docs.splunk.com/Documentation/Splunk/7.2.6/SearchReference/CryptographicFunctions

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Re: Encrypt data during anonymization

Path Finder

This way you can generate hashes. But it isn´t possible to revert this to get the original value. There is no password or certificate based encryption implemented in Splunk yet. As far as I know.

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Re: Encrypt data during anonymization

Esteemed Legend

There is a hot new product called Cribl that is a swiss-army-knife to backfill all of the things that splunk should do but doesn't/can't. I passed this on to them and they should comment (@clintsharp, @dritan).

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