ps/Modules/Cole.PowerShell.Developer/Public/Get-SSHConfigEntries.ps1

function Get-SSHConfigEntries {
<#
.SYNOPSIS
    This function is used to get the specified user's SSH config entries as a hashtable for ease of parsing

.PARAMETER Username
    [string] The user to get the ssh config for

.PARAMETER Path
    [string] The path to the config file to read in
#>
    [CmdletBinding(DefaultParameterSetName = 'Username')]
    [OutputType([object[]])]
    param (
        [Parameter(ParameterSetName = 'Username')]
        [string]$Username = (Get-CurrentUsername),

        [Parameter(ParameterSetName = 'Path', Mandatory = $true)]
        [ValidateNotNullOrEmpty()]
        [string]$Path
    )

    $logLead = (Get-LogLeadName)

    if ($PSCmdlet.ParameterSetName -eq 'Username') {
        $magicPathRoot = '~\.ssh'
        $magicPath = (Join-Path -Path $magicPathRoot -ChildPath 'config')

        if (!(Test-Path -Path $magicPathRoot) -or !(Test-Path -Path $magicPath)) {
            Write-Warning "$logLead : No SSH config file found for current user"
            return $null
        } else {
            $Path = $magicPath
        }
    }

    if (!(Test-Path -Path $Path)) {
        Write-Warning "$logLead : No SSH config file found at [$Path]"
        return $null
    }

    $lines = (Get-Content -Path $Path)

<#
Format of SSH client config file ssh_config
The ssh_config client configuration file has the following format. Both the global /etc/ssh/ssh_config and per-user ~/ssh/config have the same format.

Empty lines and lines starting with '#' are comments.

Each line begins with a keyword, followed by argument(s).

Configuration options may be separated by whitespace or optional whitespace and exactly one =.

Arguments may be enclosed in double quotes (") in order to specify arguments that contain spaces.
#>

    $currentObject = @{ Comments = @(); }
    $return = @()
    foreach ($line in $lines) {
        $rawLine = $line
        $line = $line.Trim()
        if ([string]::IsNullOrWhiteSpace($line)) {
            if (($currentObject.Comments.Count -gt 0) -or ($null -ne $currentObject.Host)) {
                # We have either an object or a random block of comments.
                # Assume it's a "previous record" and put it on the $return, then gen up a new object and keep going
                $return += $currentObject
                $currentObject = @{ Comments = @(); }
            }
            continue
        }

        $value = ''

        $commentStartingIndex = $line.IndexOf('#')
        $comment = ''
        if ($commentStartingIndex -gt -1) {
            $comment = $line.Substring($commentStartingIndex + 1).Trim()
            $line = $line.Substring(0, $commentStartingIndex).Trim()
        }

        if ([string]::IsNullOrWhiteSpace($line)) {
            $currentObject.Comments += $comment

            continue
        }

        $quotedIdentifierStartingIndex = $line.IndexOf('"')
        $quotedIdentifierEndingIndex = $line.LastIndexOf('"')
        if (($quotedIdentifierStartingIndex -gt -1) -and ($quotedIdentifierEndingIndex -gt $quotedIdentifierStartingIndex)) {
            # There is a value on the line that starts and ends with a quote mark, so we should escape that into a variable for now
            $value = $line.Substring($quotedIdentifierStartingIndex + 1, $quotedIdentifierEndingIndex - $quotedIdentifierStartingIndex - 1)
            $line = $line.Substring(0, $quotedIdentifierStartingIndex).Trim()
        }

        if ([string]::IsNullOrWhiteSpace($value)) {
            $firstSpaceIndex = $line.Trim().IndexOf(' ')
            if ($firstSpaceIndex -gt -1) {
                $value = $line.Trim().Substring($firstSpaceIndex + 1)
                $line = $line.Trim().Substring(0, $firstSpaceIndex)
            }
        }

        if ([string]::IsNullOrWhiteSpace($line)) {
            Write-Host "$logLead : Somehow we have ended up with an empty key name for [$rawLine] with a value [$value] and potential comment [$comment]"
        } else {
            Write-Verbose "$logLead : We have ended up with a key name for [$line] with a value [$value] and potential comment [$comment]"
            $currentObject.$line = $value
            if (![string]::IsNullOrWhiteSpace($comment)) {
                $currentObject.$line | Add-Member -NotePropertyName 'Comment' -NotePropertyValue $comment
            }
        }
    }

    if (($currentObject.Comments.Count -gt 0) -or ($null -ne $currentObject.Host)) {
        # We ended with something that hasn't been appended to the return value yet.
        $return += $currentObject
    }

    return $return
}