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    Certificate Management Service:CreateExternalCACertificate

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    Certificate Management Service:CreateExternalCACertificate

    Last Updated:Oct 30, 2025

    Creates and issues an external intermediate CA certificate using a Certificate Signing Request (CSR) and API parameters.

    Operation description

    Description

    • This API operation creates an external intermediate CA certificate using a provided CSR and optional API pass-through parameters.

    • The InstanceId parameter is required. This parameter specifies the ID of the external intermediate CA instance that you want to use.

    • The Csr parameter must contain a valid CSR.

    • The Validity parameter specifies the certificate validity period. You can set this parameter to a value in a relative or absolute time format.

    • You can use the ApiPassthrough parameter to overwrite information in the CSR or add certificate extensions, such as subject information.

    • Note: For end-entity CA certificates, set the pathLenConstraint parameter to 0.

    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:CreateExternalCACertificate

    create

    *All Resource

    *

    		 None None

    Request parameters

    Parameter

    Type

    Required

    Description

    Example
    InstanceId

    string

    No

    The ID of the external intermediate CA instance to enable.

    cas_deposit-cn-1234abcd
    Csr

    string

    No

    Certificate Signing Request. The CSR can contain information such as the SubjectDN and custom extensions for the CA certificate. The CA generates the SubjectKeyIdentifier, AuthorityKeyIdentifier, and CRLDistributionPoints extensions. Any values for these extensions in the CSR are ignored.

    -----BEGIN CERTIFICATE REQUEST----- MIIBczCCARgCAQAwgYoxFDASBgNVBAMMC2FsaXl1bi50ZXN0MQ0wCwYDVQQ ... vbIgMQIhAKHDWD6/WAMbtezAt4bysJ/BZIDz1jPWuUR5GV4TJ/mS -----END CERTIFICATE REQUEST-----

    Validity

    string

    No

    The certificate validity period. Supports relative and absolute time.

    Note

    Relative time: Supports units of year, month, and day.

    • Year - y

    • Month - m

    • Day - d

    Note

    Absolute time: Uses GMT. Format: yyyy-MM-dd'T'HH:mm:ss'Z'

    • Specify expiration time - $NotAfter

    • Specify start and expiration times - $NotBefore/$NotAfter

    10y
    ApiPassthrough

    object

    No

    Use API parameters to overwrite CSR content or add it to the CA certificate.

    Subject

    object

    No

    The subject information for the CA certificate. If this value is specified, it overwrites the SubjectDN in the CSR.

    Country

    string

    No

    The country. Use the two-letter country code from ISO 3166-1.

    CN
    State

    string

    No

    The state or province.

    Zhejiang
    Locality

    string

    No

    The city or region.

    Hangzhou
    Organization

    string

    No

    The organization or company.

    Alibaba
    OrganizationUnit

    string

    No

    The subdivision within the organization, such as a department, team, project group, or branch.

    Cloud Security
    CommonName

    string

    No

    The name of the CA certificate.

    Testing CA
    Extensions

    object

    No

    CA certificate extensions. If this value is specified, it overwrites the extension values in the CSR or adds them to the CA certificate extensions.

    PathLenConstraint

    integer

    No

    The certificate path length constraint. For an EndEntity CA, this value must be 0. This indicates that the CA certificate is used to issue end-entity certificates.

    0
    ExtendedKeyUsages

    array

    No

    Extended key usages.

    string

    No

    Allowed values:

    • any - No restrictions

    • serverAuth - Server authentication

    • clientAuth - Client authentication

    • codeSigning - Code signing

    • emailProtection - Email protection

    • timeStamping - Timestamping

    • OCSPSigning - OCSP signing

    • Other extended key usage OIDs

    Valid values:

    • codeSigning :

      codeSigning

    • emailProtection :

      emailProtection

    • serverAuth :

      serverAuth

    • timeStamping :

      timeStamping

    • any :

      any

    • clientAuth :

      clientAuth

    • OCSPSigning :

      OCSPSigning

    serverAuth
    Tags

    array<object>

    No

    object

    No

    Key

    string

    No

    database
    Value

    string

    No

    1
    ResourceGroupId

    string

    No

    test

    Response elements

    Element

    Type

    Description

    Example

    object

    OpenApiResponse

    RequestId

    string

    The ID of the request.

    12345678-1234-1234-1234-123456789ABC
    Identifier

    string

    The unique identifier of the certificate.

    1ed4068c-6f1b-6deb-8e32-3f8439a851cb
    Certificate

    string

    The content of the certificate.

    -----BEGIN CERTIFICATE----- MIIEkjCCA3qgAwIBAgIQCgFBQgAAAVOFc2oLheynCDANBgkqhkiG9w0BAQsFADA/ ... ... ... KOqkqm57TH2H3eDJAkSnh6/DNFu0Qg== -----END CERTIFICATE-----

    CertificateChain

    string

    The CA certificate chain.

    -----BEGIN CERTIFICATE----- ... ... -----END CERTIFICATE----- -----BEGIN CERTIFICATE----- ... ... -----END CERTIFICATE-----

    Examples

    Success response

    JSON format

    {
  "RequestId": "12345678-1234-1234-1234-123456789ABC",
  "Identifier": "1ed4068c-6f1b-6deb-8e32-3f8439a851cb",
  "Certificate": "-----BEGIN CERTIFICATE-----\nMIIEkjCCA3qgAwIBAgIQCgFBQgAAAVOFc2oLheynCDANBgkqhkiG9w0BAQsFADA/\n...\n...\n...\nKOqkqm57TH2H3eDJAkSnh6/DNFu0Qg==\n-----END CERTIFICATE-----\n",
  "CertificateChain": "-----BEGIN CERTIFICATE-----\n...\n...\n-----END CERTIFICATE-----\n-----BEGIN CERTIFICATE-----\n...\n...\n-----END CERTIFICATE-----\n"
}

    Error codes

    See Error Codes for a complete list.

    Release notes

    See Release Notes for a complete list.