Swift

Binary Certificate Extension Data

See more Certificates Examples

Demonstrates how to binary certificate extension data by OID.

The GetExtensionBd method is added in Chilkat v9.5.0.96.

Swift

func chilkatTest() {
    var success: Bool = false

    let cert = CkoCert()!

    success = cert.load(fromFile: "qa_data/certs/testCert.cer")
    if success == false {
        print("\(cert.lastErrorText!)")
        return
    }

    let bd = CkoBinData()!

    // The particular certificate in this test contains the following extensions

    var oid: String? = "1.2.250.1.71.1.2.5"
    success = cert.getExtensionBd(oid: oid, bd: bd)
    if success == true {
        print("\(oid!): \(bd.getEncoded(encoding: "hex_lower")!)")
    }

    oid = "1.2.250.1.71.1.2.2"
    success = cert.getExtensionBd(oid: oid, bd: bd)
    if success == true {
        print("\(oid!): \(bd.getEncoded(encoding: "hex_lower")!)")
    }

    oid = "1.2.250.1.71.1.2.3"
    success = cert.getExtensionBd(oid: oid, bd: bd)
    if success == true {
        print("\(oid!): \(bd.getEncoded(encoding: "hex_lower")!)")
    }

    oid = "1.2.250.1.71.1.2.7"
    success = cert.getExtensionBd(oid: oid, bd: bd)
    if success == true {
        print("\(oid!): \(bd.getEncoded(encoding: "hex_lower")!)")
    }

    oid = "1.2.250.1.71.4.2.5"
    success = cert.getExtensionBd(oid: oid, bd: bd)
    if success == true {
        print("\(oid!): \(bd.getEncoded(encoding: "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"
    var strXml: String? = cert.getExtension(asXml: oid)
    if cert.lastMethodSuccess == true {
        print("\(oid!): \(strXml!)")
    }

    oid = "1.2.250.1.71.1.2.2"
    strXml = cert.getExtension(asXml: oid)
    if cert.lastMethodSuccess == true {
        print("\(oid!): \(strXml!)")
    }

    oid = "1.2.250.1.71.1.2.3"
    strXml = cert.getExtension(asXml: oid)
    if cert.lastMethodSuccess == true {
        print("\(oid!): \(strXml!)")
    }

    oid = "1.2.250.1.71.1.2.7"
    strXml = cert.getExtension(asXml: oid)
    if cert.lastMethodSuccess == true {
        print("\(oid!): \(strXml!)")
    }

    oid = "1.2.250.1.71.4.2.5"
    strXml = cert.getExtension(asXml: oid)
    if cert.lastMethodSuccess == true {
        print("\(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

}