Lua Requires Chilkat v9.5.0.96+

Binary Certificate Extension Data

See more Certificates Examples

Demonstrates how to binary certificate extension data by OID. Lua

local chilkat = require("chilkat")

local cert = chilkat.Cert.new()

local success = cert:load_from_file("qa_data/certs/testCert.cer")
if not success then
    print(cert.last_error_text)
    return
end

local bd = chilkat.BinData.new()

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

local oid = "1.2.250.1.71.1.2.5"
success = cert:get_extension_bd(oid, bd)
if success then
    print(oid .. ": " .. bd:get_encoded("hex_lower"))
end

oid = "1.2.250.1.71.1.2.2"
success = cert:get_extension_bd(oid, bd)
if success then
    print(oid .. ": " .. bd:get_encoded("hex_lower"))
end

oid = "1.2.250.1.71.1.2.3"
success = cert:get_extension_bd(oid, bd)
if success then
    print(oid .. ": " .. bd:get_encoded("hex_lower"))
end

oid = "1.2.250.1.71.1.2.7"
success = cert:get_extension_bd(oid, bd)
if success then
    print(oid .. ": " .. bd:get_encoded("hex_lower"))
end

oid = "1.2.250.1.71.4.2.5"
success = cert:get_extension_bd(oid, bd)
if success then
    print(oid .. ": " .. bd:get_encoded("hex_lower"))
end

-- 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"
local strXml = cert:get_extension_as_xml(oid)
if cert.last_method_success then
    print(oid .. ": " .. strXml)
end

oid = "1.2.250.1.71.1.2.2"
strXml = cert:get_extension_as_xml(oid)
if cert.last_method_success then
    print(oid .. ": " .. strXml)
end

oid = "1.2.250.1.71.1.2.3"
strXml = cert:get_extension_as_xml(oid)
if cert.last_method_success then
    print(oid .. ": " .. strXml)
end

oid = "1.2.250.1.71.1.2.7"
strXml = cert:get_extension_as_xml(oid)
if cert.last_method_success then
    print(oid .. ": " .. strXml)
end

oid = "1.2.250.1.71.4.2.5"
strXml = cert:get_extension_as_xml(oid)
if cert.last_method_success then
    print(oid .. ": " .. strXml)
end

-- 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