(Swift 3,4,5...) 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.

Note: This example requires Chilkat v9.5.0.96 or later.

For more information, see https://learn.microsoft.com/en-us/rest/api/keyvault/certificates/get-certificate/get-certificate?tabs=HTTP

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func chilkatTest() {
    // 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.

    var success: Bool

    // Provide information needed for Chilkat to automatically get an OAuth2 access token as needed.
    let json = CkoJsonObject()!
    json.update("client_id", value: "APP_ID")
    json.update("client_secret", value: "APP_PASSWORD")
    json.update("resource", value: "https://vault.azure.net")
    json.update("token_endpoint", value: "https://login.microsoftonline.com/TENANT_ID/oauth2/token")

    let http = CkoHttp()!

    // 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.authToken = json.emit()

    // Replace VAULT_NAME with the name of your Azure Key Vault.
    http.setUrlVar("certName", value: "importCert01")

    let sbResponse = CkoStringBuilder()!
    success = http.quickGetSb("https://VAULT_NAME.vault.azure.net/certificates/{$certName}?api-version=7.4", sbContent: sbResponse)
    if success == false {

        var statusCode: Int = http.lastStatus.intValue
        if statusCode == 0 {
            // We did not get a response from the server..
            print("\(http.lastErrorText!)")
        }
        else {
            // We received a response, but it was an error.
            print("Error response status code: \(statusCode)")
            print("Error response:")
            print("\(sbResponse.getAsString()!)")
        }

        return
    }

    let jsonResp = CkoJsonObject()!
    jsonResp.loadSb(sbResponse)
    jsonResp.emitCompact = 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.

    let cert = CkoCert()!
    success = cert.load(fromBase64: jsonResp.string(of: "cer"))
    if success == false {
        print("\(cert.lastErrorText!)")
        print("Failed to load certificate from Base64 DER.")
        return
    }

    // 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"
    let sbId = CkoStringBuilder()!
    sbId.append(jsonResp.string(of: "id"))
    var certVersion: String? = sbId.getAfterFinal("/", removeFlag: 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
    //     }
    //   }
    // }

}