Encoding / Decoding

Linux

Check File MD5 hash

• md5sum id_rsa

Encode SSH Key to Base64

• cat id_rsa |base64 -w 0;echo

Move to target machine

Decode the File

• echo -n '<Base64 String>' | base64 -d > id_rsa

Confirm the MD5 Hashes Match

• md5sum id_rsa

Windows

CMD

• check md5sum (Linux)

  • md5sum id_rsa

• encode to b64

  • cat id_rsa | base64 -w 0;echo

• decode in Powershell on target

  • [IO.File]::WriteAllBytes("C:\Users\Public\id_rsa", [Convert]::FromBase64String("<b64 string here>"))

• check md5sum (Powershell)

  • Get-FileHash C:\Users\Public\id_rsa -Algorithm md5

Powershell

Encode File Using PowerShell

• [Convert]::ToBase64String((Get-Content -path "C:\Windows\system32\drivers\etc\hosts" -Encoding byte))

• Get MD5 Hash

  • Get-FileHash "C:\Windows\system32\drivers\etc\hosts" -Algorithm MD5 | select Hash

Decode Base64 String in Linux

• echo <b64 string> | base64 -d > hosts

Check MD5sum

• md5sum hosts