(PowerBuilder) 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 ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

integer li_rc
oleobject loo_Cert
integer li_Success
string ls_ExtensionXmlStr
oleobject loo_Xml
oleobject loo_SbOcsp
oleobject loo_SbIssuer

loo_Cert = create oleobject
// Use "Chilkat_9_5_0.Cert" for versions of Chilkat < 10.0.0
li_rc = loo_Cert.ConnectToNewObject("Chilkat.Cert")
if li_rc < 0 then
    destroy loo_Cert
    MessageBox("Error","Connecting to COM object failed")
    return
end if

li_Success = loo_Cert.LoadFromFile("qa_data/certs/test_haswdt.cer")
if li_Success <> 1 then
    Write-Debug loo_Cert.LastErrorText
    destroy loo_Cert
    return
end if

// Get the Authority Information Access extension, which is at OID 1.3.6.1.5.5.7.1.1
ls_ExtensionXmlStr = loo_Cert.GetExtensionAsXml("1.3.6.1.5.5.7.1.1")
if loo_Cert.LastMethodSuccess = 0 then
    Write-Debug "Certificate does not have the AuthInfoAccess extension."
    destroy loo_Cert
    return
end if

loo_Xml = create oleobject
// Use "Chilkat_9_5_0.Xml" for versions of Chilkat < 10.0.0
li_rc = loo_Xml.ConnectToNewObject("Chilkat.Xml")

loo_Xml.LoadXml(ls_ExtensionXmlStr)

// See what we have..
Write-Debug loo_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:

loo_SbOcsp = create oleobject
// Use "Chilkat_9_5_0.StringBuilder" for versions of Chilkat < 10.0.0
li_rc = loo_SbOcsp.ConnectToNewObject("Chilkat.StringBuilder")

li_Success = loo_Xml.GetChildContentSb("/C/oid,1.3.6.1.5.5.7.48.1|++",loo_SbOcsp)
if li_Success = 1 then
    loo_SbOcsp.Decode("base64","utf-8")
    Write-Debug "1.3.6.1.5.5.7.48.1:  " + loo_SbOcsp.GetAsString()
end if

loo_SbIssuer = create oleobject
// Use "Chilkat_9_5_0.StringBuilder" for versions of Chilkat < 10.0.0
li_rc = loo_SbIssuer.ConnectToNewObject("Chilkat.StringBuilder")

li_Success = loo_Xml.GetChildContentSb("/C/oid,1.3.6.1.5.5.7.48.2|++",loo_SbIssuer)
if li_Success = 1 then
    loo_SbIssuer.Decode("base64","utf-8")
    Write-Debug "1.3.6.1.5.5.7.48.2:  " + loo_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".


destroy loo_Cert
destroy loo_Xml
destroy loo_SbOcsp
destroy loo_SbIssuer