HI,
Another year and I'm still plugging away at these old mining keys.

The wallet is circa 2013, 1CAS address, Base58 (P2PKH) format. I have found a file named "bitcoin-wallet-keys-2011-10-08" which is from the very early versions of the Andreas Schildbach Bitcoin wallet for Android. I remember using a version that didn't even have a pin lock on it, it was that early!

I believe this version was pre-256 and was hashed using MD5, I have managed to decrypt this file with OpenSSL, but now the file is some weird, non-human-readable format, a binary wallet file rather than plain WIF keys??

I've been messing about with protobuf and bitcoinj wallet tool, but can't find a way to extract such old keys, so many things have changed since then!

Any pointers would be greatly appreciated