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Parsing JWT Token & authentication with ESQl

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Lone_Wanderer

Posted: Mon Jan 16, 2017 1:46 am Post subject: Parsing JWT Token & authentication with ESQl

Newbie

Joined: 16 Jan 2017
Posts: 8

I have encoutered an interesting problem with authentication. I'm developing REST service which will be given JWT token. This token then needs to be decoded and parsed for required information. After the information about the user is received, the user is either declined or granted access. Now, the parsing and decoding part is not a problem. I have following code for that:

Code:

DECLARE EncTokenHead CHAR InputLocalEnvironment.REST.Input.Parameters.head;
DECLARE EncTokenBody CHAR InputLocalEnvironment.REST.Input.Parameters.body;
DECLARE EncTokenSign CHAR InputLocalEnvironment.REST.Input.Parameters.sign;

   DECLARE DecTokenHead BLOB BASE64DECODE(EncTokenHead);
   DECLARE DecTokenBody BLOB BASE64DECODE(EncTokenBody);
   DECLARE DecTokenSign BLOB BASE64DECODE(EncTokenSign);

DECLARE CasTokenHead CHAR CAST(DecTokenHead AS CHARACTER CCSID 1208);
DECLARE CasTokenBody CHAR CAST(DecTokenBody AS CHARACTER CCSID 1208);
DECLARE INEX       CHAR

Now, the first 3 variables are for my testing, the test service I made accepts 3 parameters, each parameter for the respective encoded part of the token. The real service wont use those parts as parameters and here is my problem. How do I reach the token? Is it part of HTTP header within the message tree or do I have to pass it really as parameters. I'm asking because I have to adress these parts somehow and I don't know where whithin the enviroment I should look for them.

Any help is appreciated.

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