Re: I have recovered an old wallet.aes.json from Blockchain.info but its a raw key
if it was 44 characters then it would be a private key Base64 (MINI) and can be used directly on bitaddress.org
A mini private key has 30 characters. I know a 44 character long format, but it's base64:
*facepalms*Bitaddress definitely didn't work until I converted it. Whatever blockchain.info outputs from 2013 is not a wif key - which is why I had issues. From the dev of the first tool I used "So, if I recall, blockchain.info saved the private keys in BASE58 format, which is totally not standard....What you need is a tool that can convert that base58 format back into hex or actual WIF format. "
I understand it now, after reading this https://bitcointalk.org/index.php?topic=1442425.msg14605685#msg14605685 so a raw base58 is a 44-char base58 representation of a 64-char Private Key HEXadecimal
and yes, it seems to be used only by blockchain.info (now .com) wallet.aes.json file