(PowerShell) Example: Mime.GetDecryptCertInfo method

Demonstrates the GetDecryptCertInfo method.

Note: This example requires Chilkat v11.4.0 or greater.

Chilkat .NET Downloads Chilkat .NET Assemblies

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

$success = $false

$mime = New-Object Chilkat.Mime

# Load MIME that is has Content-Type like this:
# Content-Type: application/pkcs7-mime; smime-type="enveloped-data"; name="smime.p7m"; smime-type="enveloped-data"
$success = $mime.LoadMimeFile("qa_data/mime/enveloped_data.eml")
if ($success -eq $false) {
    $($mime.LastErrorText)
    exit
}

# Get information about the certificate that would be needed to decrypt.
# An enveloped-data can potentially be decrypted by multiple certificates if it was encrypted in a way that allows it,
# but in most cases, only a single certificate with associated private key (that of the message recipient) is possible.
$json = New-Object Chilkat.JsonObject
$success = $mime.GetDecryptCertInfo($json)
if ($success -eq $false) {
    $($mime.LastErrorText)
    exit
}

$json.EmitCompact = $false
$($json.Emit())

# Sample output:

# {
#   "recipientInfo": [
#     {
#       "serial": "****",
#       "issuerCN": "****"
#     }
#   ]
# }

# Get each certificate's information like this:

$i = 0
$count = $json.SizeOfArray("recipientInfo")
while ($i -lt $count) {
    $json.I = $i
    $serial = $json.StringOf("recipientInfo[i].serial")
    $issuerCN = $json.StringOf("recipientInfo[i].issuerCN")
    $i = $i + 1
}