Functions/Convert-X509CertificateToBase64.ps1
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function Convert-X509CertificateToBase64 { <# .SYNOPSIS Converts an X509Certificate2 to Base64. .DESCRIPTION Converts an X509Certificate2 to Base64 string containing only the public key. .PARAMETER Certificate The X509Certificate2 object to convert to Base64. .PARAMETER NoFormat Returns the certificate as Base64 without any header, footer, or carriage returns. .EXAMPLE Get-PfxCertificate -PSPath ./cert.cer | Convert-X509CertificateToBase64 -NoFormat Removes header, footer and carriage returns from an incoming certificate. .INPUTS System.Security.Cryptography.X509Certificates.X509Certificate A X509Certificate value is received by the Certificate parameter. .OUTPUTS System.String .LINK Get-PfxCertificate #> [CmdletBinding()] [OutputType([System.String])] Param ( [Parameter(Mandatory = $true, ValueFromPipeline = $true, Position = 0)] [ValidateNotNullOrEmpty()][Alias('Cert')] [X509Certificate]$Certificate, [Parameter(Mandatory = $false, ValueFromPipeline = $false, Position = 1)] [Switch]$NoFormat ) PROCESS { try { [string]$certString = "" $base64Cert = "{0}{1}" -f ([System.Convert]::ToBase64String($Certificate.Export([X509ContentType]::Cert)), $null) if ($PSBoundParameters.ContainsKey("NoFormat")) { $certString = $base64Cert } else { $header = "-----BEGIN CERTIFICATE-----" $footer = "-----END CERTIFICATE-----" $chunkSize = 64 $stringLength = $base64Cert.Length $formattedResult = @() $formattedResult += $header for ($i = 0; $i -lt $stringLength; $i += $chunkSize) { if ($i + $chunkSize -gt $stringLength) { $chunkSize = $stringLength - $i } $formattedResult += $base64Cert.Substring($i, $chunkSize).Trim() } $formattedResult += $footer $certString = $formattedResult -join "`r`n" } } catch { $CryptographicExceptionMessage = "Unable to export certificate to Base64. Exception details: {0}" -f $_.Exception $CryptographicException = New-Object -TypeName System.Security.Cryptography.CryptographicException -ArgumentList $CryptographicExceptionMessage Write-Error -Exception $CryptographicException -Category InvalidResult -ErrorAction Stop } return $certString } } |