Zig

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.

Zig

const std = @import("std");
const chilkat = @import("chilkat");

pub fn main(init: std.process.Init) !void {
    const alloc = init.arena.allocator();

    const cert = try chilkat.Cert.init();
    defer cert.deinit();

    cert.loadFromFile("qa_data/certs/testCert.cer") catch {
        std.debug.print("{s}\n", .{try cert.getLastErrorText(alloc)});
        return;
    };

    const bd = try chilkat.BinData.init();
    defer bd.deinit();

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

    var oid: [:0]const u8 = "1.2.250.1.71.1.2.5";
    if (cert.getExtensionBd(oid, bd)) {
        std.debug.print("{s}: {s}\n", .{ oid, try bd.getEncoded(alloc, "hex_lower") });
    } else |_| {}

    oid = "1.2.250.1.71.1.2.2";
    if (cert.getExtensionBd(oid, bd)) {
        std.debug.print("{s}: {s}\n", .{ oid, try bd.getEncoded(alloc, "hex_lower") });
    } else |_| {}

    oid = "1.2.250.1.71.1.2.3";
    if (cert.getExtensionBd(oid, bd)) {
        std.debug.print("{s}: {s}\n", .{ oid, try bd.getEncoded(alloc, "hex_lower") });
    } else |_| {}

    oid = "1.2.250.1.71.1.2.7";
    if (cert.getExtensionBd(oid, bd)) {
        std.debug.print("{s}: {s}\n", .{ oid, try bd.getEncoded(alloc, "hex_lower") });
    } else |_| {}

    oid = "1.2.250.1.71.4.2.5";
    if (cert.getExtensionBd(oid, bd)) {
        std.debug.print("{s}: {s}\n", .{ oid, try bd.getEncoded(alloc, "hex_lower") });
    } else |_| {}

    // 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 str_xml: [:0]const u8 = cert.getExtensionAsXml(alloc, oid) catch "";
    if (cert.getLastMethodSuccess()) {
        std.debug.print("{s}: {s}\n", .{ oid, str_xml });
    }

    oid = "1.2.250.1.71.1.2.2";
    str_xml = try cert.getExtensionAsXml(alloc, oid);
    if (cert.getLastMethodSuccess()) {
        std.debug.print("{s}: {s}\n", .{ oid, str_xml });
    }

    oid = "1.2.250.1.71.1.2.3";
    str_xml = try cert.getExtensionAsXml(alloc, oid);
    if (cert.getLastMethodSuccess()) {
        std.debug.print("{s}: {s}\n", .{ oid, str_xml });
    }

    oid = "1.2.250.1.71.1.2.7";
    str_xml = try cert.getExtensionAsXml(alloc, oid);
    if (cert.getLastMethodSuccess()) {
        std.debug.print("{s}: {s}\n", .{ oid, str_xml });
    }

    oid = "1.2.250.1.71.4.2.5";
    str_xml = try cert.getExtensionAsXml(alloc, oid);
    if (cert.getLastMethodSuccess()) {
        std.debug.print("{s}: {s}\n", .{ oid, str_xml });
    }

    // 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 10
}