(PowerShell) Subject Alternative Name

Demonstrates the usage of the SubjectAlternativeName property to get the certificate SAN (subject alternative name) as XML.

Chilkat .NET Downloads Chilkat .NET Assemblies

Add-Type -Path "C:\chilkat\ChilkatDotNet47-9.5.0-x64\ChilkatDotNet47.dll"

# Note: Not all certificates contain a Subject Alternative Name.
# If it does not, the SubjectAlternativeName property will contain the empty string.

$cert = New-Object Chilkat.Cert

$success = $cert.LoadFromFile("qa_data/certs/testIcpBrasil.cer")
if ($success -eq $false) {
    $($cert.LastErrorText)
    exit
}

$subjectAltNameXml = $cert.SubjectAlternativeName

$($subjectAltNameXml)

# Here's a sample of the subjectAltNameXml:

# <?xml version="1.0" encoding="utf-8"?>
# <SubjectAltName>
#     <name type="oid" oid="2.16.76.1.3.4">...</name>
#     <name type="oid" oid="2.16.76.1.3.2">...</name>
#     <name type="oid" oid="2.16.76.1.3.3">...</name>
#     <name type="oid" oid="2.16.76.1.3.7">...</name>
#     <rfc822Name>...</rfc822Name>
# </SubjectAltName>

# The XML can be parsed like this:

$xml = New-Object Chilkat.Xml

$xml.LoadXml($subjectAltNameXml)

$i = 0
$count_i = $xml.NumChildrenHavingTag("name")
while ($i -lt $count_i) {
    $xml.I = $i
    $oid = $xml.ChilkatPath("name[i]|(oid)")
    $name = $xml.GetChildContent("name[i]")
    $i = $i + 1
}

$rfc822Name = $xml.GetChildContent("rfc822Name")