I got a request from Stefan Farnik and he was looking to download HASHDIR.EXE file.
I have uploaded this tool from OneDrive location here
I have explained FIX SCCM Hash Mismatch Issues and Resolution Steps in the following blog post
Hash Mismatch issues can be big headache for the technical teams.
If I have a Hash Mismatch issue in the environment I always prefer to compare the size of packages in local DP and in the parent server ? (there could be some diff in size...may be in KBs or Bytes). Also, compare the PCK file size on both the servers?