I am absolute beginner in coding, My question is how can i retrieve complete details of Digital Certificate of files containing in multiple sub folders(export to csv). With little help from google, i found below powershell code which suffice this for a single file.

get-childitem C:\Windows\notepad.exe | Get-AuthenticodeSignature  |Format-List

I am having 300 files (exe/DLLS) in multiple sub folders. What i what

• Fetch the details for all the files including files in sub folders.
• Export the details to csv.

  Then you could try the following script:

  EDIT: Removed the System.Array as per Santiago.

  # Make an array containing all FilePaths by importing the .csv file to a variable
  $Files = (Import-Csv C:\Path\To\Import.csv).FilePath
  
  # Run the script for each $File in the $Files array
  $AllFilesExport = ForEach($File in $Files) {
      
      # Get the information you want about the file
      $FileInfo = Get-ChildItem $File | Get-AuthenticodeSignature
      
      # Specify the Column name (left) and what data it should have in it (right)
      [pscustomobject]@{
          'SignerCertificate:Subject' = $FileInfo.SignerCertificate.Subject
          'SignerCertificate: Issuer' = $FileInfo.SignerCertificate.Issuer
          'SignerCertificate: Serial Number' = $FileInfo.SignerCertificate.SerialNumber
          'SignerCertificate: Not Before' = $FileInfo.SignerCertificate.NotBefore
          'SignerCertificate: Not After' = $FileInfo.SignerCertificate.NotAfter
          'SignerCertificate: Thumbprint' = $FileInfo.SignerCertificate.Thumbprint
          'TimeStamperCertificate: Subject' = $FileInfo.TimeStamperCertificate.Subject
          'TimeStamperCertificate: Issuer' = $FileInfo.TimeStamperCertificate.Issuer
          'TimeStamperCertificate: Serial Number' = $FileInfo.TimeStamperCertificate.SerialNumber
          'TimeStamperCertificate: Not Before' = $FileInfo.TimeStamperCertificate.NotBefore
          'TimeStamperCertificate: Not After' = $FileInfo.TimeStamperCertificate.NotAfter
          'TimeStamperCertificate: Thumbprint' = $FileInfo.TimeStamperCertificate.Thumbprint
          'Status' = $FileInfo.Status
          'StatusMessage' = $FileInfo.StatusMessage
          'Path' = $FileInfo.Path
      }
  }
  
  # Export all of the file information from the AllFileExport array into an export .csv file
  $AllFilesExport | Export-Csv -NoTypeInformation C:\Path\To\Export.csv