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(PHP ActiveX) Get Certificate Authority Information AccessDemonstrates 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.
<?php // For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.Cert') $cert = new COM("Chilkat.Cert"); $success = $cert->LoadFromFile('qa_data/certs/test_haswdt.cer'); if ($success != 1) { print $cert->LastErrorText . "\n"; exit; } // Get the Authority Information Access extension, which is at OID 1.3.6.1.5.5.7.1.1 $extensionXmlStr = $cert->getExtensionAsXml('1.3.6.1.5.5.7.1.1'); if ($cert->LastMethodSuccess == 0) { print 'Certificate does not have the AuthInfoAccess extension.' . "\n"; exit; } // For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.Xml') $xml = new COM("Chilkat.Xml"); $xml->LoadXml($extensionXmlStr); // See what we have.. print $xml->getXml() . "\n"; // 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: // For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.StringBuilder') $sbOcsp = new COM("Chilkat.StringBuilder"); $success = $xml->GetChildContentSb('/C/oid,1.3.6.1.5.5.7.48.1|++',$sbOcsp); if ($success == 1) { $sbOcsp->Decode('base64','utf-8'); print '1.3.6.1.5.5.7.48.1: ' . $sbOcsp->getAsString() . "\n"; } // For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.StringBuilder') $sbIssuer = new COM("Chilkat.StringBuilder"); $success = $xml->GetChildContentSb('/C/oid,1.3.6.1.5.5.7.48.2|++',$sbIssuer); if ($success == 1) { $sbIssuer->Decode('base64','utf-8'); print '1.3.6.1.5.5.7.48.2: ' . $sbIssuer->getAsString() . "\n"; } // 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". ?> |
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