How to mask values in complex json structure using dataweave? - mule-studio

Question

I want to mask the element in the json. descID element in the below json should be masked. Could you please suggest.
{
"status": "ok",
"statusCode": "19x9s011",
"statusDescription": "Service: XYZ IOP ; country: india ; Locale:en-US ; SourceId:KOP; ApiUid: 644e1dd7-2a7f-18fb-b8ed-ed78c3f899s2c2b; Description: The NMK profile call was successful.",
"details": {
"descID": "11840000000012698",
"Code": "XX",
"languageCode": "en",
"profile": {
"base": {
"username": "abc",
"firstName": "xc",
"middleName": "test",
"lastName": "123",
"shortName": "xc",
"displayName": "D",
"suffix": "T",
"prefix": "E"
}
}
}
}

Answer 1

I might use something like to mask the data:
%dw 1.0
%input payload application/json
%output application/json
%var keyToEncrypt = ['descID']
%function encrypt(val) "*****"
%function needsEncrypt(key) (sizeOf (keyToEncrypt find key)) > 0
%function maskSensitiveData(value) value mapObject ({
($$) : maskSensitiveData($) when $ is :object otherwise $
} unless needsEncrypt($$ as :string) otherwise {
($$) : encrypt($)
})
---
maskSensitiveData(payload)
This is taken verbatim from https://blogs.mulesoft.com/dev/training-dev/encrypt-specific-xml-tags-with-the-power-of-dataweave/
If you need to remove the field altogether, then I might use something like:
%dw 1.0
%input payload application/json
%output application/json
%var keyToEncrypt = ['descID']
%function encrypt(val) "*****"
%function needsEncrypt(key) (sizeOf (keyToEncrypt find key)) > 0
%function maskSensitiveData(value) value mapObject ({
($$) : maskSensitiveData($) when $ is :object otherwise $
} unless needsEncrypt($$ as :string) otherwise {})
---
maskSensitiveData(payload)

Answer 2

1.Convert payload to object
<json:json-to-object-transformer doc:name="JSON to Object" returnClass="java.util.HashMap"/>
2.Overwrite descID in payload
<expression-component doc:name="Expression"><![CDATA[payload.details.descID=flowVars.maskedvalue;]]></expression-component>
3.Convert back to json
<json:object-to-json-transformer doc:name="Object to JSON"/>