I am reviewing Bitcoin Core source code. I am following the code which states take a double sha 256 of the public key to get the IV and use the master key for the encryption key for encrypted wallet.dat file. So I have completed the following: 1. Set passphrase for my walltt.dat file. 2. Took a Double sha 256 for the compressed public key 3. Place master key in as encryption key 4. Placed encrypted private key as the input data.

I do not get the already calculated private key shown in my dumpwallet file. Did I miss some parameter for the above calculation?

I have also retrieved IV and Key from the running compiled program from github. The values do not match the ones calculated manually. Thanks for the help in advance.