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    Certificate Management Service:CreateSubCACertificate

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    Certificate Management Service:CreateSubCACertificate

    Last Updated:Aug 24, 2026

    Creates a subordinate CA certificate.

    Operation description

    This operation issues a subordinate CA certificate by using an existing root CA certificate. The subordinate CA certificate can be used to issue client and server certificates.

    Before you call this operation, you must have called CreateRootCACertificate to create a root CA certificate.

    QPS limit

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    Try it now

    Try this API in OpenAPI Explorer, no manual signing needed. Successful calls auto-generate SDK code matching your parameters. Download it with built-in credential security for local usage.

    Test

    RAM authorization

    The table below describes the authorization required to call this API. You can define it in a Resource Access Management (RAM) policy. The table's columns are detailed below:

    • Action: The actions can be used in the Action element of RAM permission policy statements to grant permissions to perform the operation.

    • API: The API that you can call to perform the action.

    • Access level: The predefined level of access granted for each API. Valid values: create, list, get, update, and delete.

    • Resource type: The type of the resource that supports authorization to perform the action. It indicates if the action supports resource-level permission. The specified resource must be compatible with the action. Otherwise, the policy will be ineffective.

      • For APIs with resource-level permissions, required resource types are marked with an asterisk (*). Specify the corresponding Alibaba Cloud Resource Name (ARN) in the Resource element of the policy.

      • For APIs without resource-level permissions, it is shown as All Resources. Use an asterisk (*) in the Resource element of the policy.

    • Condition key: The condition keys defined by the service. The key allows for granular control, applying to either actions alone or actions associated with specific resources. In addition to service-specific condition keys, Alibaba Cloud provides a set of common condition keys applicable across all RAM-supported services.

    • Dependent action: The dependent actions required to run the action. To complete the action, the RAM user or the RAM role must have the permissions to perform all dependent actions.

    Action

    Access level

    Resource type

    Condition key

    Dependent action

    yundun-cert:CreateSubCACertificate

    create

    *All Resource

    *

    		 None None

    Request parameters

    Parameter

    Type

    Required

    Description

    Example
    ParentIdentifier

    string

    No

    The unique identifier of the root CA certificate.

    Note

    You can invoke DescribeCACertificateList to query the unique identifiers of all CA certificates.

    1a83bcbb89e562885e40aa0108f5****
    CommonName

    string

    Yes

    The common name or abbreviation of the organization. Chinese and English characters are supported.

    Aliyun
    OrganizationUnit

    string

    Yes

    The name of the department or branch under the organization. Chinese and English characters are supported.

    Security
    Organization

    string

    Yes

    The name of the organization associated with the subordinate CA certificate (corresponding to your enterprise or entity). Chinese and English characters are supported.

    Alibaba
    Locality

    string

    Yes

    The name of the city where the organization is located. Chinese and English characters are supported.

    Hangzhou
    State

    string

    Yes

    The name of the province or state where the organization is located. Chinese and English characters are supported.

    Zhejiang
    CountryCode

    string

    No

    The code of the country or region where the organization is located, represented by a two-letter or three-letter uppercase abbreviation. For example, CN represents China, and US represents the United States.

    For the codes of different countries, see the International codes section in Manage company information.

    CN
    Algorithm

    string

    Yes

    The key algorithm type of the subordinate CA certificate. The key algorithm is represented in the <encryption algorithm>_<key length> format. Valid values:

    • RSA_1024: The corresponding signature algorithm is Sha256WithRSA.

    • RSA_2048: The corresponding signature algorithm is Sha256WithRSA.

    • RSA_4096: The corresponding signature algorithm is Sha256WithRSA.

    • ECC_256: The corresponding signature algorithm is Sha256WithECDSA.

    • SM2_256: The corresponding signature algorithm is SM3WithSM2.

    The encryption algorithm of the subordinate CA certificate must be the same as that of the root CA certificate, but the key length can be different. Example: If the key algorithm of the root CA certificate is RSA_2048, the key algorithm of the subordinate CA certificate must be RSA_1024, RSA_2048, or RSA_4096.

    Note

    You can invoke DescribeCACertificate to query the key algorithm of the root CA certificate.

    RSA_2048
    Years

    integer

    Yes

    The validity period of the subordinate CA certificate. Unit: years.

    Set this value to 5 to 10 years.

    Note

    The validity period of the subordinate CA certificate cannot exceed that of the root CA certificate. You can invoke DescribeCACertificate to query the validity period of the root CA certificate.

    5
    PathLenConstraint

    integer

    No

    The path length constraint of the certificate. Default value: 0.

    0
    ExtendedKeyUsages

    array

    No

    The extension key usages.

    string

    No

    The extension key usage. Valid values:

    • any

    • serverAuth

    • clientAuth

    • codeSigning

    • emailProtection

    • timeStamping

    • OCSPSigning

    • Other extension key usage OIDs

    Valid values:

    • codeSigning :

      Code signing.

    • emailProtection :

      Email protection.

    • serverAuth :

      Server authentication.

    • timeStamping :

      Timestamp issuance.

    • any :

      Any.

    • clientAuth :

      Client authentication.

    • OCSPSigning :

      OCSP signing.

    serverAuth
    EnableCrl

    boolean

    No

    Specifies whether to enable the CRL service. Valid values:

    • false: Disabled.

    • true: Enabled.

    Valid values:

    • true :

      true

    • false :

      false

    true
    CrlDay

    integer

    No

    The validity period of the CRL. Valid values: 1 to 365. Unit: days.

    30
    Tags

    array<object>

    No

    The label list.

    object

    No

    The label list.

    Key

    string

    No

    The label key.

    testKey
    Value

    string

    No

    The label value.

    test
    ResourceGroupId

    string

    No

    The resource group ID.

    rg-ae****vty
    ClientToken

    string

    No

    A client token that is used to ensure the idempotence of the request. The value is generated by the client and must be unique across different requests. The parameter value can be up to 64 ASCII characters in length and cannot contain non-ASCII characters.

    XXX
    CertMaxTime

    integer

    No

    The maximum validity period of certificates issued by the CA, specified by the certMaxTime of the CA. Unit: days.

    30

    Response elements

    Element

    Type

    Description

    Example

    object

    The response object.

    RequestId

    string

    The request ID, which is a unique identity generated by Alibaba Cloud for the request. You can use this ID to troubleshoot issues.

    15C66C7B-671A-4297-9187-2C4477247A74
    Identifier

    string

    The unique identifier of the subordinate CA certificate created in this request.

    160ae6bb538d538c70c01f81dcf2****
    Certificate

    string

    The certificate in PEM format created by invoking this operation.

    -----BEGIN CERTIFICATE-----\n......\n-----END CERTIFICATE-----
    CertificateChain

    string

    The CA certificate chain of the certificate created by invoking this operation.

    -----BEGIN CERTIFICATE-----\n......\n-----END CERTIFICATE-----\n-----BEGIN CERTIFICATE-----\n......\n-----END CERTIFICATE-----\n

    • serverAuth: server authentication

    • clientAuth: client authentication

    • codeSigning: code signing

    • emailProtection: email protection

    • timeStamping: UNIX timestamp signing

    • OCSPSigning: OCSP signing

    • Other extension key usage OIDs

    Examples

    Success response

    JSON format

    {
  "RequestId": "15C66C7B-671A-4297-9187-2C4477247A74",
  "Identifier": "160ae6bb538d538c70c01f81dcf2****",
  "Certificate": "-----BEGIN CERTIFICATE-----\\n......\\n-----END CERTIFICATE-----",
  "CertificateChain": "-----BEGIN CERTIFICATE-----\\n......\\n-----END CERTIFICATE-----\\n-----BEGIN CERTIFICATE-----\\n......\\n-----END CERTIFICATE-----\\n"
}

    Error codes

    See Error Codes for a complete list.

    Release notes

    See Release Notes for a complete list.