Public/Get-SSHFileInfo.ps1
|
<#
.SYNOPSIS This function gets information about the specified SSH Key/Certificate file. Output is a PSCustomObject with the following properties... File = $PathToKeyFile FileType = $FileType Contents = $Contents Info = $Info FingerPrint = $FingerPrint PasswordProtected = $PasswordProtected ...where... - $PathToKeyFile is the path to the Key file specified by the -PathToKeyFile parameter, - $FileType is either "RSAPublicKey", "RSAPrivateKey", or "RSAPublicKeyCertificate" - $Contents is the result of: Get-Content $PathToKeyFile - $Info is the result of: ssh-keygen -l -f "$PathToKeyFile" - $FingerPrint is the fingerprint of the $PathToKeyFile - $PasswordProtected is a Boolean that indicates whether or not the file is password protected. .DESCRIPTION See .SYNOPSIS .NOTES .PARAMETER PathToKeyFile This parameter is MANDATORY. This parameter takes a string that represents the full path to the SSH Key/Cert File you would like to inspect. .EXAMPLE # Open an elevated PowerShell Session, import the module, and - PS C:\Users\zeroadmin> Get-SSHFileInfo -PathToKeyFile "$HOME\.ssh\id_rsa" #> function Get-SSHFileInfo { [CmdletBinding()] Param( [Parameter(Mandatory=$True)] [string]$PathToKeyFile ) # Make sure we have access to ssh binaries if (![bool]$(Get-Command ssh-keygen -ErrorAction SilentlyContinue)) { Write-Error "Unable to find 'ssh-keygen'! Halting!" $global:FunctionResult = "1" return } # Make sure the path exists if (!$(Test-Path $PathToKeyFile)) { Write-Error "Unable to find the path '$PathToKeyFile'! Halting!" $global:FunctionResult = "1" return } # This function can't validate .ppk files from putty, so just assume they're valid if ($(Get-Item $PathToKeyFile).Extension -eq ".ppk") { [pscustomobject]@{ File = $PathToKeyFile FileType = "PuttyCombinedPublicPrivateKey" Contents = $(Get-Content $PathToKeyFile) Info = $(Get-Content $PathToKeyFile) FingerPrint = $null PasswordProtected = $null } return } #$SSHKeyGenParentDir = $(Get-Command ssh-keygen).Source | Split-Path -Parent $SSHKeyGenArguments = "-l -f `"$PathToKeyFile`"" $ProcessInfo = New-Object System.Diagnostics.ProcessStartInfo #$ProcessInfo.WorkingDirectory = $SSHKeyGenParentDir $ProcessInfo.FileName = $(Get-Command ssh-keygen).Source $ProcessInfo.RedirectStandardError = $true $ProcessInfo.RedirectStandardOutput = $true #$ProcessInfo.StandardOutputEncoding = [System.Text.Encoding]::Unicode #$ProcessInfo.StandardErrorEncoding = [System.Text.Encoding]::Unicode $ProcessInfo.UseShellExecute = $false $ProcessInfo.Arguments = $SSHKeyGenArguments $Process = New-Object System.Diagnostics.Process $Process.StartInfo = $ProcessInfo $Process.Start() *> $null # Below $FinishedInAlottedTime returns boolean true/false $FinishedInAlottedTime = $Process.WaitForExit(2000) if (!$FinishedInAlottedTime) { $Process.Kill() $ProcessKilled = $True } $stdout = $Process.StandardOutput.ReadToEnd() $stderr = $Process.StandardError.ReadToEnd() $SSHKeyGenOutput = $stdout + $stderr $KeyFileContent = Get-Content $PathToKeyFile if ($SSHKeyGenOutput -match "(RSA-CERT)") { $PublicKeyCertInfo = [scriptblock]::Create("ssh-keygen -L -f `"$PathToKeyFile`"").InvokeReturnAsIs() $PublicKeyCertContent = $KeyFileContent $FingerPrint = [scriptblock]::Create("ssh-keygen -l -f `"$PathToKeyFile`"").InvokeReturnAsIs() $IsPublicKeyCert = $True } elseif ($SSHKeyGenOutput -match "(RSA)") { # It could be either a Public Key or Private Key $PrivateKeyAttempt = Validate-SSHPrivateKey -PathToPrivateKeyFile $PathToKeyFile if (!$PrivateKeyAttempt.ValidSSHPrivateKeyFormat) { $IsPublicKey = $True $PublicKeyContent = $KeyFileContent $PublicKeyInfo = $FingerPrint = [scriptblock]::Create("ssh-keygen -l -f `"$PathToKeyFile`"").InvokeReturnAsIs() } else { $IsPrivateKey = $True $PrivateKeyContent = $PrivateKeyInfo = $KeyFileContent $FingerPrint = [scriptblock]::Create("ssh-keygen -l -f `"$PathToKeyFile`"").InvokeReturnAsIs() $PasswordProtected = $PrivateKeyAttempt.PasswordProtected } } elseif ($SSHKeyGenOutput -match "passphrase|pass phrase" -or $($SSHKeyGenOutput -eq $null -and $ProcessKilled)) { $IsPrivateKey = $True $PrivateKeyContent = $PrivateKeyInfo = $KeyFileContent $PasswordProtected = $True } elseif ($KeyFileContent.Count -gt 0) { if ($(Get-Content $PathToKeyFile)[0] -match "SSH2") { [pscustomobject]@{ File = $PathToKeyFile FileType = "SSH2_RFC4716" Contents = $(Get-Content $PathToKeyFile) Info = $(Get-Content $PathToKeyFile) FingerPrint = $null PasswordProtected = $null } } return } else { $NotPubKeyPrivKeyOrPubCert = $True } if ($NotPubKeyPrivKeyOrPubCert) { Write-Warning "'$PathToKeyFile' is NOT a Public Key, Public Key Certificate, or Private Key" } else { if ($IsPublicKeyCert) { $FileType = "RSAPublicKeyCertificate" $Contents = $PublicKeyCertContent $Info = $PublicKeyCertInfo $PasswordProtected = $False } if ($IsPublicKey) { $FileType = "RSAPublicKey" $Contents = $PublicKeyContent $Info = $PublicKeyInfo $PasswordProtected = $False } if ($IsPrivateKey) { $FileType = "RSAPrivateKey" $Contents = $PrivateKeyContent $Info = $PrivateKeyInfo $PasswordProtected = $PrivateKeyAttempt.PasswordProtected } [pscustomobject]@{ File = $PathToKeyFile FileType = $FileType Contents = $Contents Info = $Info FingerPrint = $FingerPrint PasswordProtected = $PasswordProtected } } } |