Chilkat Examples

ChilkatHOMEAndroid™Classic ASPCC++C#Mono C#.NET Core C#C# UWP/WinRTDataFlexDelphi ActiveXDelphi DLLVisual FoxProJavaLianjaMFCObjective-CPerlPHP ActiveXPHP ExtensionPowerBuilderPowerShellPureBasicCkPythonChilkat2-PythonRubySQL ServerSwift 2Swift 3,4,5...TclUnicode CUnicode C++Visual Basic 6.0VB.NETVB.NET UWP/WinRTVBScriptXojo PluginNode.jsExcelGo

VB.NET UWP/WinRT Examples

Web API Categories

ASN.1
Amazon EC2
Amazon Glacier
Amazon S3
Amazon S3 (new)
Amazon SES
Amazon SNS
Amazon SQS
Azure Cloud Storage
Azure Service Bus
Azure Table Service
Base64
Bounced Email
Box
CAdES
CSR
CSV
Certificates
Compression
DKIM / DomainKey
DSA
Diffie-Hellman
Digital Signatures
Dropbox
Dynamics CRM
EBICS
ECC
Ed25519
Email Object
Encryption
FTP
FileAccess
Firebase
GMail REST API
GMail SMTP/IMAP/POP
Geolocation
Google APIs
Google Calendar
Google Cloud SQL
Google Cloud Storage
Google Drive
Google Photos
Google Sheets
Google Tasks
Gzip
HTML-to-XML/Text
HTTP

HTTP Misc
IMAP
JSON
JSON Web Encryption (JWE)
JSON Web Signatures (JWS)
JSON Web Token (JWT)
Java KeyStore (JKS)
MHT / HTML Email
MIME
MS Storage Providers
Microsoft Graph
NTLM
OAuth1
OAuth2
OIDC
Office365
OneDrive
OpenSSL
Outlook
Outlook Calendar
Outlook Contact
PDF Signatures
PEM
PFX/P12
PKCS11
POP3
PRNG
REST
REST Misc
RSA
SCP
SCard
SFTP
SMTP
SSH
SSH Key
SSH Tunnel
ScMinidriver
SharePoint
Socket/SSL/TLS
Spider
Stream
Tar Archive
Upload
WebSocket
XAdES
XML
XML Digital Signatures
XMP
Zip
curl

 

 

 

(VB.NET UWP/WinRT) Get Certificate Authority Information Access

Demonstrates how to get a certificate's Authority Information Access extension data (if it exists).

Note: This example requires Chilkat v9.5.0.76 or greater.

Chilkat Universal Windows Platform (UWP) / WinRT Downloads

Chilkat for the Universal Windows Platform (UWP)

Dim cert As New Chilkat.Cert

Dim success As Boolean = cert.LoadFromFile("qa_data/certs/test_haswdt.cer")
If (success <> True) Then
    Debug.WriteLine(cert.LastErrorText)
    Exit Sub
End If


'  Get the Authority Information Access extension, which is at OID 1.3.6.1.5.5.7.1.1
Dim extensionXmlStr As String = cert.GetExtensionAsXml("1.3.6.1.5.5.7.1.1")
If (cert.LastMethodSuccess = False) Then
    Debug.WriteLine("Certificate does not have the AuthInfoAccess extension.")
    Exit Sub
End If


Dim xml As New Chilkat.Xml
xml.LoadXml(extensionXmlStr)

'  See what we have..
Debug.WriteLine(xml.GetXml())

'  We should get XML like this:

'  <?xml version="1.0" encoding="utf-8" ?>
'  <sequence>
'      <sequence>
'          <oid>1.3.6.1.5.5.7.48.2</oid>
'          <contextSpecific tag="6" constructed="0">aHR0cDovL2NydC5jb21vZG9jYS5jb20vQ09NT0RPUlNBQ2xpZW50QXV0aGVudGljYXRpb25hbmRTZWN1
'  cmVFbWFpbENBLmNydA==</contextSpecific>
'      </sequence>
'      <sequence>
'          <oid>1.3.6.1.5.5.7.48.1</oid>
'          <contextSpecific tag="6" constructed="0">aHR0cDovL29jc3AuY29tb2RvY2EuY29t</contextSpecific>
'      </sequence>
'  </sequence>

'  Typically, a certificate AIA(Authority Information access) contains 2 parts:
' 
'      On-line Certificate Status Protocol (1.3.6.1.5.5.7.48.1)
'      Certification Authority Issuer (1.3.6.1.5.5.7.48.2)
' 
'  The base64 content for each OID (in this case) is just a string.
'  The data can be accessed and decoded like this:

Dim sbOcsp As New Chilkat.StringBuilder
success = xml.GetChildContentSb("/C/oid,1.3.6.1.5.5.7.48.1|++",sbOcsp)
If (success = True) Then
    sbOcsp.Decode("base64","utf-8")
    Debug.WriteLine("1.3.6.1.5.5.7.48.1:  " & sbOcsp.GetAsString())
End If


Dim sbIssuer As New Chilkat.StringBuilder
success = xml.GetChildContentSb("/C/oid,1.3.6.1.5.5.7.48.2|++",sbIssuer)
If (success = True) Then
    sbIssuer.Decode("base64","utf-8")
    Debug.WriteLine("1.3.6.1.5.5.7.48.2:  " & sbIssuer.GetAsString())
End If


'  The output looks like this:

'  1.3.6.1.5.5.7.48.1:  http://ocsp.comodoca.com
'  1.3.6.1.5.5.7.48.2:  http://crt.comodoca.com/COMODORSAClientAuthenticationandSecureEmailCA.crt

'  -------------------------------------------------------------------------------
'  Note: The Chilkat path passed to GetChildContentSb is composed of two commands:
'  The first command is "/C/oid,1.3.6.1.5.5.7.48.1".   It says "traverse the XML tree from the caller
' node and stop at the 1st node having tag = "oid" and content = "1.3.6.1.5.5.7.48.1".
'  The "|" char separates the 1st command from the 2nd.
'  The 2nd command is "++" and says "move to the next sibling".

 

© 2000-2022 Chilkat Software, Inc. All Rights Reserved.