Knowledge Base

Scenario

Archived PKI Client logs are stored in a compressed format with a .zlib extension and cannot be viewed directly with plain text editors such as Notepad.

To view archived .zlib files, the QPDF utility zlib-flate can be used:

• QPDF can be downloaded for Windows from: https://sourceforge.net/projects/qpdf/files/qpdf/10.3.1/ - select the -bin-msvc64.zip version for Windows 64-bit.
• On Mac OS, QPDF can be installed from CLI using Brew : brew install qpdf 
• QPDF and the associated utilities is available by default in various Linux distributions.

Once installed, the zlib-flate utility can be used to un-compress the zlib files in CLI:

• Windows: zlib-flate.exe -uncompress < pki-client-log-filename.txt.zlib > output.txt
  The above command will create a file called output.txt
  
  
• Mac / UNIX: zlib-flate -uncompress  < pki-client-log-file.txt.zlib > output
  The above command creates a plain text file called output.

For further assistance, contact DigiCert PKI Support.