Android Question Base64 Encode of an Hmac

[Kerbeross]

Hi, sorry for my bad English.
I need to port this php line to B4A:

$signature = base64_encode(hash_hmac("sha256", $string_to_sign, $secret_key, true));

hash_hmac function generate a keyed hash value using the HMAC method. With the last parameter to true returns raw binary data.

base64_encode function Encodes data with MIME base64.

Can someone help me please?

 

[KMatle]

I'm not sure what you need here. Usually you e.g. hash a pw, encode it to Base64, store it and compare that Base64 string later on the server side. It's not an encryption, so as you compare 2 Base64 strings, everything should be fine.

Are you getting errors from the Base64 encoding?

 

[Kerbeross]

I do not need to verify passwords, is a signature required by the Amazon Product Advertising APIs.
However I used this code module to get what I need: https://www.b4x.com/android/forum/t...r-b4x-works-on-b4a-b4i-b4j.81272/#post-550129