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(.NET Core C#) Binary Certificate Extension DataSee more Certificates ExamplesDemonstrates how to binary certificate extension data by OID. The GetExtensionBd method is added in Chilkat v9.5.0.96.
Chilkat.Cert cert = new Chilkat.Cert(); bool success = cert.LoadFromFile("qa_data/certs/testCert.cer"); if (success == false) { Debug.WriteLine(cert.LastErrorText); return; } Chilkat.BinData bd = new Chilkat.BinData(); // The particular certificate in this test contains the following extensions string oid = "1.2.250.1.71.1.2.5"; success = cert.GetExtensionBd(oid,bd); if (success == true) { Debug.WriteLine(oid + ": " + bd.GetEncoded("hex_lower")); } oid = "1.2.250.1.71.1.2.2"; success = cert.GetExtensionBd(oid,bd); if (success == true) { Debug.WriteLine(oid + ": " + bd.GetEncoded("hex_lower")); } oid = "1.2.250.1.71.1.2.3"; success = cert.GetExtensionBd(oid,bd); if (success == true) { Debug.WriteLine(oid + ": " + bd.GetEncoded("hex_lower")); } oid = "1.2.250.1.71.1.2.7"; success = cert.GetExtensionBd(oid,bd); if (success == true) { Debug.WriteLine(oid + ": " + bd.GetEncoded("hex_lower")); } oid = "1.2.250.1.71.4.2.5"; success = cert.GetExtensionBd(oid,bd); if (success == true) { Debug.WriteLine(oid + ": " + bd.GetEncoded("hex_lower")); } // Sample output: // 1.2.250.1.71.1.2.5: 040180 // 1.2.250.1.71.1.2.2: 020100 // 1.2.250.1.71.1.2.3: 1315383032353030303030312f32393030303539313432 // 1.2.250.1.71.1.2.7: 02010a // 1.2.250.1.71.4.2.5: 30060c04534d3236 // The above binary values are actually ASN.1 // You can get the ASN.1 decoed by calling GetExtensionAsXml to get it in XML format, // and then you extract the values from the XML. oid = "1.2.250.1.71.1.2.5"; string strXml = cert.GetExtensionAsXml(oid); if (cert.LastMethodSuccess == true) { Debug.WriteLine(oid + ": " + strXml); } oid = "1.2.250.1.71.1.2.2"; strXml = cert.GetExtensionAsXml(oid); if (cert.LastMethodSuccess == true) { Debug.WriteLine(oid + ": " + strXml); } oid = "1.2.250.1.71.1.2.3"; strXml = cert.GetExtensionAsXml(oid); if (cert.LastMethodSuccess == true) { Debug.WriteLine(oid + ": " + strXml); } oid = "1.2.250.1.71.1.2.7"; strXml = cert.GetExtensionAsXml(oid); if (cert.LastMethodSuccess == true) { Debug.WriteLine(oid + ": " + strXml); } oid = "1.2.250.1.71.4.2.5"; strXml = cert.GetExtensionAsXml(oid); if (cert.LastMethodSuccess == true) { Debug.WriteLine(oid + ": " + strXml); } // Sample output: // 1.2.250.1.71.1.2.5: <octets>gA==</octets> // 1.2.250.1.71.1.2.2: <int>00</int> // 1.2.250.1.71.1.2.3: <printable>8025000001/2900059142</printable> // 1.2.250.1.71.1.2.7: <int>0A</int> // 1.2.250.1.71.4.2.5: <sequence><utf8>SM26</utf8></sequence> // "gA==" is the base64 encoded byte values // "0A" is hex for decimal 1 |
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