PSCredentialStore/src/Item/Get-CredentialStoreItem.ps1

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function Get-CredentialStoreItem {
<#
.SYNOPSIS
Returns the Credential from a given remote host item.
.DESCRIPTION
Return the credential as PSCredential object.
.PARAMETER RemoteHost
Specify the host, for which you would like to change the credentials.
.PARAMETER Identifier
Provide a custom identifier to the given remote host key. This enables you to store multiple credentials
for a single remote host entry. For example ad/sys1, ftp/sys1, mssql/sys1
.PARAMETER Path
Define a custom path to a shared CredentialStore.
.PARAMETER Shared
Switch to shared mode with this param. This enforces the command to work with a shared CredentialStore which
can be decrypted across systems.
.INPUTS
[None]
.OUTPUTS
[System.Management.Automation.PSCredential]
.EXAMPLE
$myCreds = Get-CredentialStoreItem -Path "C:\TMP\mystore.json" -RemoteHost "esx01.myside.local"
.NOTES
```
File Name : Get-CredentialStoreItem.ps1
Author : Marco Blessing - marco.blessing@googlemail.com
Requires :
```
.LINK
https://github.com/OCram85/PSCredentialStore
#>
[CmdletBinding(DefaultParameterSetName = "Private")]
[OutputType([PSCredential])]
param(
[Parameter(Mandatory = $true, ParameterSetName = "Shared")]
[Parameter(Mandatory = $true, ParameterSetName = "Private")]
[ValidateNotNullOrEmpty()]
[string]$RemoteHost,
[Parameter(Mandatory = $false, ParameterSetName = "Shared")]
[Parameter(Mandatory = $false, ParameterSetName = "Private")]
[ValidateNotNullOrEmpty()]
[string]$Identifier,
[Parameter(Mandatory = $true, ParameterSetName = "Shared")]
[switch]$Shared,
[Parameter(Mandatory = $false, ParameterSetName = "Shared")]
[ValidateNotNullOrEmpty()]
[string]$Path
)
begin {
# Set the CredentialStore for private, shared or custom mode.
Write-Debug ("ParameterSetName: {0}" -f $PSCmdlet.ParameterSetName)
if ($PSCmdlet.ParameterSetName -eq "Private") {
$Path = Get-DefaultCredentialStorePath
}
elseif ($PSCmdlet.ParameterSetName -eq "Shared") {
if (!($PSBoundParameters.ContainsKey('Path'))) {
$Path = Get-DefaultCredentialStorePath -Shared
}
}
}
process {
if ($Identifier -ne "") {
$CredentialName = $RemoteHost = "{0}/{1}" -f $Identifier, $RemoteHost
}
else {
$CredentialName = $RemoteHost
}
if (Test-CredentialStore -Shared -Path $Path) {
$CS = Get-CredentialStore -Shared -Path $Path
$CSMembers = Get-Member -InputObject $CS
# Let's first check if the given remote host exists as object property
if (($CSMembers.MemberType -eq "NoteProperty") -and ($CSMembers.Name -contains $CredentialName)) {
$Cert = Get-PfxCertificate -FilePath $CS.PfXCertificate -ErrorAction Stop
$DecryptedKey = $Cert.PrivateKey.Decrypt(
[Convert]::FromBase64String($CS.$CredentialName.EncryptedKey),
[System.Security.Cryptography.RSAEncryptionPadding]::Pkcs1
)
if (! $ExpandOutput.isPresent) {
[PSCredential]::new(
$CS.$CredentialName.User,
($CS.$CredentialName.Password | ConvertTo-SecureString -Key $DecryptedKey)
)
}
}
else {
$MsgParams = @{
ErrorAction = "Stop"
Message = "Could not find credentials for the given remote host: {0}" -f $RemoteHost
}
Write-Error @MsgParams
}
}
else {
$MsgParams = @{
ErrorAction = "Stop"
Message = "The given credential store ({0}) does not exist!" -f $Path
}
Write-Error @MsgParams
}
}
end {
}
}