Decrypt S/MIME using a Certificate with Private Key Access

See more MIME Examples

Loads a CMS/PKCS #7 encrypted S/MIME message and decrypts it back to the original MIME content.

DecryptUsingCert takes a single certificate that already has access to its associated private key, for example a certificate loaded from a PFX.

The file paths are relative to the application's current working directory. Absolute paths may also be used. Supply the paths appropriate to your own environment.

Add-Type -Path "C:\chilkat\ChilkatDotNet47-x64\ChilkatDotNet47.dll"

$success = $false

$mime = New-Object Chilkat.Mime
$success = $mime.LoadMimeFile("qa_data/encrypted.eml")
if ($success -eq $false) {
    $($mime.LastErrorText)
    exit
}

#  Decrypt using a certificate that already provides access to its private key (for example loaded
#  from a PFX).  The only argument is the certificate.
$pfxPassword = "myPfxPassword"
$cert = New-Object Chilkat.Cert
$success = $cert.LoadPfxFile("qa_data/recipient.pfx",$pfxPassword)
if ($success -eq $false) {
    $($cert.LastErrorText)
    exit
}

$success = $mime.DecryptUsingCert($cert)
if ($success -eq $false) {
    $($mime.LastErrorText)
    exit
}

$body = $mime.GetBodyDecoded()
if ($mime.LastMethodSuccess -eq $false) {
    $($mime.LastErrorText)
    exit
}

$($body)