---
title: "Activate Sub CA"
slug: "security-privateca-activatesubca"
tags: ["Private CA"]
updated: 2026-10-08T04:21:15Z
published: 2026-10-08T04:21:15Z
canonical: "api.ncloud-docs.com/security-privateca-activatesubca"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://api.ncloud-docs.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Activate Sub CA

Available in Classic and VPC

Activate an intermediate certificate authority (CA) with a direct signing method using a signed certificate and the CA's certificate.

              Caution

              

Be careful when using the issuing CA's certificate because it is not the CA's private key.

## Request

This section describes the request format. The method and URI are as follows:

| Method | URI |
| --- | --- |
| POST | /api/v1/ca/{caTag}/activate |

### Request headers

For information about the request headers common to all Private CA APIs, see [Private CA request headers](/docs/en/security-privateca#%EC%9A%94%EC%B2%AD%ED%97%A4%EB%8D%94).

### Request path parameters

You can use the following path parameters with your request:

| Field | Type | Required | Description |
| --- | --- | --- | --- |
| `caTag` | String | Required | CA tag value - See [Get CA list](/docs/en/security-privateca-getcalist). |

### Request body

You can include the following data in the body of your request:

| Field | Type | Required | Description |
| --- | --- | --- | --- |
| `certPem` | String | Required | CA certificate (PEM) - Enter a newline character (`\n`) after `-----BEGIN CERTIFICATE-----` and in front of `-----END CERTIFICATE-----`. |
| `caChainPem` | String | Required | Signer certificate chain (PEM) - Enter a newline character (`\n`) after `-----BEGIN CERTIFICATE-----` and in front of `-----END CERTIFICATE-----`. |

### Request example

The request example is as follows:

```
curl --location --request POST 'https://pca.apigw.ntruss.com/api/v1/ca/*********-*********/activate' \
--header 'x-ncp-apigw-timestamp: {Timestamp}' \
--header 'x-ncp-iam-access-key: {Access Key}' \
--header 'x-ncp-apigw-signature-v2: {API Gateway Signature}' \
--header 'Content-Type: application/json' \
--data '{
    "certPem": "-----BEGIN CERTIFICATE-----\n{Certificate}\n-----END CERTIFICATE-----",
    "caChainPem": "-----BEGIN CERTIFICATE-----\n{CA Chain}\n-----END CERTIFICATE-----"
}'
```

## Response

This section describes the response format.

### Response body

The response body includes the following data:

| Field | Type | Required | Description |
| --- | --- | --- | --- |
| `code` | String | - | Response code |
| `msg` | String | - | Response message |
| `data` | Object | - | Response result |
| `data.caInfo` | Object | - | CA information |
| `data.caInfo.signingCount` | Number | - | No. of certificates signed by CA |
| `data.caInfo.caType` | String | - | CA type - `PRIVATE_ROOT` \| `PRIVATE_SUB` |
| `data.caInfo.caId` | Number | - | CA identifier |
| `data.caInfo.statusUpdateDate` | String | - | Latest status change date and time - Timestamp format |
| `data.destroyDate` | String | - | Deletion date and time - Timestamp format |
| `data.caInfo.alias` | String | - | CA name |
| `data.caInfo.memo` | String | - | CA memo |
| `data.caInfo.urlInfo` | Object | - | URL information |
| `data.caInfo.urlInfo.ocsp` | Array | - | Online Certificate Status Protocol (OCSP) URL |
| `data.caInfo.urlInfo.crl` | Array | - | Certificate revocation list (CRL) URL |
| `data.caInfo.urlInfo.ca` | Array | - | CA URL |
| `data.caTag` | String | - | CA's tag value |
| `data.rgstDate` | Number | - | Registration date and time - Timestamp format |
| `data.status` | String | - | CA status - `ACTIVE` \| `DEACTIVATED` \| `DESTROYING` - `ACTIVE`: Enabled - `DEACTIVATED`: Disabled - `DESTROYING`: Scheduled for deletion |
| `data.caCertInfo` | Object | - | CA certificate information |
| `data.caCertInfo.commonName` | String | - | Common name |
| `data.caCertInfo.country` | String | - | Standard country code - See [ISO 3166-1 alpha-2](https://ko.wikipedia.org/wiki/ISO_3166-1_alpha-2). |
| `data.caCertInfo.issueName` | String | - | Issued CA name |
| `data.caCertInfo.notAfterDate` | Long | - | Certification expiration date and time - Timestamp format |
| `data.caCertInfo.publicKeyAlgorithm` | String | - | Encryption algorithm |
| `data.caCertInfo.notBeforeDate` | Long | - | Certification validity start date and time - Timestamp format |
| `data.caCertInfo.locality` | String | - | City name |
| `data.caCertInfo.stateProvince` | String | - | State/province or region name |
| `data.caCertInfo.organizationUnit` | String | - | Department name |
| `data.caCertInfo.certPem` | String | - | CA certificate (PEM) |
| `data.caCertInfo.chainPem` | String | - | Certificate chain (PEM) |
| `data.caCertInfo.signatureAlgorithm` | String | - | Signature algorithm |
| `data.caCertInfo.serialNo` | String | - | Certificate serial number |
| `data.caCertInfo.caCertId` | Long | - | Certification identifier |
| `data.caCertInfo.organization` | String | - | Organization name |

### Response status codes

For information about the response status codes common to all Private CA APIs, see [Private CA response status codes](/docs/en/security-privateca#%EC%9D%91%EB%8B%B5%EC%83%81%ED%83%9C%EC%BD%94%EB%93%9C).

### Response example

The response example is as follows:

```
{
    "code": "SUCCESS",
    "msg": "Success",
    "data": {
        "caInfo": {
            "signingCount": 0,
            "caType": "PRIVATE_SUB",
            "caId": 18***,
            "statusUpdateDate": null,
            "destroyDate": null,
            "alias": "caca002",
            "memo": "",
            "urlInfo": {
                "ocsp": [],
                "crl": [
                    "https://pca.apigw.ntruss.com/ext/*********-*********/crl"
                ],
                "ca": [
                    "https://pca.apigw.ntruss.com/ext/*********-*********/ca"
                ]
            },
            "caTag": "*********-*********",
            "rgstDate": 1723101003000,
            "status": "PENDING"
        },
        "caCertInfo": {
            "commonName": "name000",
            "country": "KR",
            "issuerName": "RootCA",
            "notAfterDate": 1754637093000,
            "publicKeyAlgorithm": "RSA",
            "notBeforeDate": 1723101093000,
            "locality": "Pangyo",
            "stateProvince": "Seongnam-si",
            "organizationUnit": "unit000",
            "certPem": "-----BEGIN CERTIFICATE-----\n{Certificate}\n-----END CERTIFICATE-----",
            "chainPem": "-----BEGIN CERTIFICATE-----\n{CA Chain}\n-----END CERTIFICATE-----",
            "signatureAlgorithm": "SHA256withRSA",
            "serialNo": "**:**:**:**:**:**:**:**:**:**:**:**:**:**:**:**:**:**:**:**",
            "caCertId": 18173,
            "organization": "org000"
        }
    }
}
```