How to transfer aes key from js to java server?

Question

I am trying to transfer AES key generate in js:

var AESkey = forge.random.getBytesSync(16);

exapmle if printed condsole i have "§½­üå8bdÈP"

but printed in my java server it is "—§‡½­\u001eüå8b\u000ed�\u0012P›" (other data are ok)

I tried to get the bytes with Buffer.from(AESkey) but instead of getting a 16 bytes buffer I get a 22/24/25.. buffer lenghts.

In which format can I transfer the key and how can I get my AESkey to that format in js?

Answer 1

A possible solution:

• make a base64 encoded string on client side
• send base64-encoded string to server
• decode base64 in Java to get the byte sequence back

This way the byte sequence can be safely transported.