Develop a working hmac_sha256 function for ASP Classic, that matches the output format specified. Crypt key show in hex: K = 57617b5d2349434b34734345635073433835777e2d244c31715535255a366773755a4d70532a5879793238235f707c4f7865753f3f446e633a21575643303f66 Control: In this example, the above key is used to calculate a MAC for the string M="amount=100¤cy=EUR" To calculate the MAC of the message M="amount=100¤cy=EUR", the HMAC_SHA256-algorithm is used: MAC = HMAC-SHA256( hexDecode(K), M ) = b436e3e86cb3800b3864aeecc8d06c126f005e7645803461717a8e4b2de3a905 Once your function takes key: 57617b5d2349434b34734345635073433835777e2d244c31715535255a366773755a4d70532a5879793238235f707c4f7865753f3f446e633a21575643303f66 input: amount=100¤cy=EUR and returns the string "b436e3e86cb3800b3864aeecc8d06c126f005e7645803461717a8e4b2de3a905", the task is completed. I recorded a quick video to illustrate, how you can test if your function is working and see a bit more on the calculation. Watch it here: /t/UaOadMJqB Ressources: Example of somebody implementing something very similar: /thread.jspa?threadID=34858 Test-tool: /dibs_api/other_features/hmac_tool/ This should be 2-4 hours of work, if you know your way around ASP classic. I will pay 100$ if it can be completed inside 12 hours. ------------------------------------------ Added 28 AUG 2012, 18:16 PM EDT A code starting point: /u/16755651/asp.zip Desired Skills: ASP Keywords: Web Programming, ASP