Lua Requires Chilkat v9.5.0.96+

Azure Key Vault Get the Latest Version of a Certificate

See more Azure Key Vault Examples

Demonstrates how to get the latest version of a certificate in Azure Key Vault. Lua

local chilkat = require("chilkat")

-- This requires the Chilkat API to have been previously unlocked.
-- See Global Unlock Sample for sample code.

-- See Azure Key Vault Get Certificates for a more detailed explanation
-- for how Chilkat is automatically getting the OAuth2 access token for your application.

-- Provide information needed for Chilkat to automatically get an OAuth2 access token as needed.
local json = chilkat.JsonObject.new()
json:update_string("client_id", "APP_ID")
json:update_string("client_secret", "APP_PASSWORD")
json:update_string("resource", "https://vault.azure.net")
json:update_string("token_endpoint", "https://login.microsoftonline.com/TENANT_ID/oauth2/token")

local http = chilkat.Http.new()

-- Instead of providing an actual access token, we give Chilkat the information that allows it to
-- automatically fetch the access token using the OAuth2 client credentials flow.
http.auth_token = json:emit()

-- Replace VAULT_NAME with the name of your Azure Key Vault.
http:set_url_var("certName", "importCert01")

local sbResponse = chilkat.StringBuilder.new()
local success = http:quick_get_sb("https://VAULT_NAME.vault.azure.net/certificates/{$certName}?api-version=7.4", sbResponse)
if not success then
    local statusCode = http.last_status
    if statusCode == 0 then
        -- We did not get a response from the server..
        print(http.last_error_text)
    else
        -- We received a response, but it was an error.
        print("Error response status code: " .. statusCode)
        print("Error response:")
        print(sbResponse:get_as_string())
    end

    return
end

local jsonResp = chilkat.JsonObject.new()
jsonResp:load_sb(sbResponse)
jsonResp.emit_compact = false

print(jsonResp:emit())

-- A sample JSON response is show at the bottom.

-- Let's do two things with the result.
-- 1) Load the DER of the cert into a Chilkat Cert object.
-- 2) Get the Key Vault version id of the certificate.

local cert = chilkat.Cert.new()
success = cert:load_from_base64(jsonResp:string_of("cer"))
if not success then
    print(cert.last_error_text)
    print("Failed to load certificate from Base64 DER.")
    return
end

-- The Azure Key Vault's "version" of the certificate is the hex string at the end of the "id", "kid", and "sid" JSON members.
-- For example:  "7140c8755ed14839b5d86a9f7e7f0497"
local sbId = chilkat.StringBuilder.new()
sbId:append(jsonResp:string_of("id"))
local certVersion = sbId:get_after_final("/", false)
print("The key vault cert version is " .. certVersion)

-- {
--   "id": "https://kvchilkat.vault.azure.net/certificates/importCert01/7140c8755ed14839b5d86a9f7e7f0497",
--   "kid": "https://kvchilkat.vault.azure.net/keys/importCert01/7140c8755ed14839b5d86a9f7e7f0497",
--   "sid": "https://kvchilkat.vault.azure.net/secrets/importCert01/7140c8755ed14839b5d86a9f7e7f0497",
--   "x5t": "I_e3776K5Q_6PN1HHvJoI2ZGQRQ",
--   "cer": "MIIGXjCCB .... cjTsi7yIY=",
--   "attributes": {
--     "enabled": true,
--     "nbf": 1633996800,
--     "exp": 1728691199,
--     "created": 1697411128,
--     "updated": 1697411128,
--     "recoveryLevel": "CustomizedRecoverable+Purgeable",
--     "recoverableDays": 7
--   },
--   "policy": {
--     "id": "https://kvchilkat.vault.azure.net/certificates/importCert01/policy",
--     "key_props": {
--       "exportable": true,
--       "kty": "RSA",
--       "key_size": 4096,
--       "reuse_key": false
--     },
--     "secret_props": {
--       "contentType": "application/x-pkcs12"
--     },
--     "x509_props": {
--       "subject": "CN=\"Chilkat Software, Inc.\", O=\"Chilkat Software, Inc.\", S=Illinois, C=US",
--       "ekus": [
--         "1.3.6.1.5.5.7.3.3"
--       ],
--       "key_usage": [
--         "digitalSignature"
--       ],
--       "validity_months": 37,
--       "basic_constraints": {
--         "ca": false
--       }
--     },
--     "lifetime_actions": [
--       {
--         "trigger": {
--           "lifetime_percentage": 80
--         },
--         "action": {
--           "action_type": "EmailContacts"
--         }
--       }
--     ],
--     "issuer": {
--       "name": "Unknown"
--     },
--     "attributes": {
--       "enabled": true,
--       "created": 1697411128,
--       "updated": 1697411128
--     }
--   }
-- }