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GCM Encryption/Decryption Implementation using Crypto Modules

  • 1.  GCM Encryption/Decryption Implementation using Crypto Modules

    Posted Fri March 24, 2023 01:39 AM

    Hello Team,

    How to perform AES256-GCM Encryption/Decryption logic using "crypto" module on API Connect. We have used below code (crypto module) to encrypt/decrypt text, able to encrypt text but while decrypt getting "Cannot read property 'length' of undefined" error. Please help how to implement it.

    As well can we perform AES256-GCM on Datapower. if yes, then please suggest how to do it? Please find below API connect and DataPower version.

    Version:

    API Connect: v10.0.1.5

    Datapower:10.0.1.5

    Code:

    Encryption:

    apim.output('application/json');

    var crypto = require('crypto');

    var SymKey ='Q1F1WUN4SVZOeVRPdDQ4NzA4NFVQQk14aFMwWHhSRTQ=';

    var iv1='dzZ0bXZLelVqNlJn';

    var buff = new Buffer(SymKey, 'base64');

    var buff1=new Buffer(iv1,'base64');

    var cipher = crypto.createCipheriv('A256GCM', buff,buff1);

    var pay_load = '{"abc":"ad"}';

    var resp = JSON.stringify(pay_load);

    cipher. update(resp, 'utf8');

    var encipherData = cipher.final('base64');

    var Jdata=encipherData;

    session.output.write({"EncryptedPayload":Jdata});

    OP:

    {

        "EncryptedPayload": "VEEwUlk4c0xIVEtHY1BUOHFiOUI4M0V6"

    }

    Decrypt:

    var EncryptedResponse=apim.getvariable('request.body.EncryptedPayload');

    apim.output('application/json');

    var crypto = require('crypto');

    var SymKey ='Q1F1WUN4SVZOeVRPdDQ4NzA4NFVQQk14aFMwWHhSRTQ=';

    var iv1='dzZ0bXZLelVqNlJn';

    var buf = new Buffer(SymKey, 'base64');

    var buff = new Buffer(iv1, 'base64');

    var decipher = crypto.createDecipheriv('A256GCM',buf,buff);

    decipher. update(EncryptedResponse, 'base64');

    var originalPlainText1 = decipher.final('utf8');

    session.output.write(originalPlainText1);



    ------------------------------
    Jyoti Yadav
    ------------------------------


  • 2.  RE: GCM Encryption/Decryption Implementation using Crypto Modules

    Posted Mon April 17, 2023 02:22 AM

    Hello Team,

    Can we implement AES256- GCM ENcryption/Decryption on "IBM API Connect v5 " using "Crypto" Modules ? 

    Thanks 





    ------------------------------
    Jyoti Yadav
    ------------------------------

    Original Message