Private/Compare-SecureString.ps1
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function Compare-SecureString { <# .SYNOPSIS Compares 2 SecureString variables .DESCRIPTION Compares 2 SecureString variables .PARAMETER secureString1 A SecureString to evaluate against secureString2 .PARAMETER secureString2 A SecureString to evaluate against secureString1 .EXAMPLE Compare-SecureString -secureString1 $Secure1 -secureString2 $Secure2 Checks $Secure1 against $Secure2 to confirm they match #> [CmdLetBinding()] [OutputType('System.Boolean')] Param ( [Parameter( Mandatory = $True, ValueFromPipelineByPropertyName = $True )] [System.Security.SecureString]$secureString1, [Parameter( Mandatory = $True, ValueFromPipelineByPropertyName = $True )] [System.Security.SecureString]$secureString2 ) Process { try { $bstr1 = [Runtime.InteropServices.Marshal]::SecureStringToBSTR($secureString1) $bstr2 = [Runtime.InteropServices.Marshal]::SecureStringToBSTR($secureString2) $length1 = [Runtime.InteropServices.Marshal]::ReadInt32($bstr1, -4) $length2 = [Runtime.InteropServices.Marshal]::ReadInt32($bstr2, -4) if ( $length1 -ne $length2 ) { return $false } for ( $i = 0; $i -lt $length1; ++$i ) { $b1 = [Runtime.InteropServices.Marshal]::ReadByte($bstr1, $i) $b2 = [Runtime.InteropServices.Marshal]::ReadByte($bstr2, $i) if ( $b1 -ne $b2 ) { return $false } } return $true } finally { if ( $bstr1 -ne [IntPtr]::Zero ) { [Runtime.InteropServices.Marshal]::ZeroFreeBSTR($bstr1) } if ( $bstr2 -ne [IntPtr]::Zero ) { [Runtime.InteropServices.Marshal]::ZeroFreeBSTR($bstr2) } } } } |