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    Certificate Management Service:CreateClientCertificate

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    Certificate Management Service:CreateClientCertificate

    Last Updated:Dec 24, 2025

    Issues a client certificate based on a system-generated Certificate Signing Request (CSR).

    Operation description

    Before you call this operation, you must call CreateRootCACertificate to create a root certificate authority (CA) certificate and CreateSubCACertificate to create a subordinate CA certificate. Only subordinate CA certificates can issue client certificates.

    QPS limits

    This operation is limited to 10 queries per second (QPS) per user. If the limit is exceeded, API calls are throttled. This may affect your business. Plan your API calls accordingly.

    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:CreateClientCertificate

    create

    *All Resource

    *

    		 None None

    Request parameters

    Parameter

    Type

    Required

    Description

    Example
    SanType

    integer

    No

    The type of the Subject Alternative Name (SAN) extension of the client certificate. Valid values:

    • 1: email address.

    • 6: Uniform Resource Identifier (URI).

    1
    SanValue

    string

    No

    The specific extensions for the client certificate. Separate multiple extensions with commas.

    somebody@example.com
    Organization

    string

    No

    The name of the organization. Default value: Alibaba Inc.

    阿里云
    OrganizationUnit

    string

    No

    The name of the department. Default value: Aliyun CDN.

    IT
    Country

    string

    No

    The country code. Default value: CN.

    CN
    CommonName

    string

    No

    The name of the certificate user. For a client authentication certificate, the user is typically a person, company, organization, or application. Enter the common name of the user, such as John Doe, Alibaba, Alibaba Cloud Cryptography Platform, or Tmall Genie.

    aliyun
    State

    string

    No

    The name of the province or state where the organization is located. Chinese and English characters are supported. The default value is the province or state of the organization that is associated with the issuing subordinate CA certificate.

    Zhejiang
    Locality

    string

    No

    The name of the city where the organization is located. Chinese and English characters are supported. The default value is the city of the organization that is associated with the issuing subordinate CA certificate.

    杭州市
    Algorithm

    string

    No

    The key algorithm of the client certificate. The key algorithm is 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.

    • ECC_384: The corresponding signature algorithm is Sha256WithECDSA.

    • ECC_512: The corresponding signature algorithm is Sha256WithECDSA.

    • SM2_256: The corresponding signature algorithm is SM3WithSM2.

    The encryption algorithm of the client certificate must be the same as the subordinate CA certificate. The key length can be different. For example, if the key algorithm of the subordinate CA certificate is RSA_2048, the key algorithm of the client certificate must be RSA_1024, RSA_2048, or RSA_4096.

    Note

    Call DescribeCACertificate to query the key algorithm of the subordinate CA certificate.

    RSA_2048
    ParentIdentifier

    string

    No

    The unique identifier of the subordinate CA certificate that issues the client certificate.

    Note

    Call [DescribeCACertificateList] to query the unique identifier of the subordinate CA certificate.

    273ae6bb538d538c70c01f81jh2****
    Years

    integer

    No

    The validity period of the certificate in years.

    5
    Months

    integer

    No

    The validity period of the certificate in months.

    1
    Days

    integer

    No

    The validity period of the client certificate in days. You cannot leave Days, BeforeTime, and AfterTime all empty. You must specify both BeforeTime and AfterTime or leave them both empty. The following rules apply:

    • If you specify Days, you can choose to specify BeforeTime and AfterTime or leave them empty.

    • If you do not specify Days, you must specify BeforeTime and AfterTime.

    Note

    • If you specify Days, BeforeTime, and AfterTime, the value of Days determines the validity period of the client certificate.

    • The validity period of the client certificate cannot exceed that of the subordinate CA certificate. Call DescribeCACertificate to view the validity period of the subordinate CA certificate.

    365
    BeforeTime

    integer

    No

    The issuance time of the client certificate. This value is a UNIX timestamp. The default value is the time when you call this operation. Unit: seconds.

    Note

    The BeforeTime and AfterTime parameters must be both empty or both specified.

    1634283958
    AfterTime

    integer

    No

    The expiration time of the client certificate. This value is a UNIX timestamp. Unit: seconds.

    Note

    The BeforeTime and AfterTime parameters must be both empty or both specified.

    1665819958
    Immediately

    integer

    No

    Specifies whether to return the digital certificate immediately.

    • 0: No. This is the default value.

    • 1: Yes, return the certificate.

    • 2: Yes, return the certificate and its certificate chain.

    1
    EnableCrl

    integer

    No

    Specifies whether to include the Certificate Revocation List (CRL) address.

    0: No 1: Yes

    1
    Tags

    array<object>

    No

    The list of tags.

    object

    No

    The list of tags.

    Key

    string

    No

    The tag key.

    account
    Value

    string

    No

    The tag value.

    1
    ResourceGroupId

    string

    No

    The ID of the resource group.

    rg-aek****wia
    CustomIdentifier

    string

    No

    The custom identifier. This is a unique key.

    ****6bb538d538c70c01f81jh2****

    In addition to the preceding request parameters, you must specify common request parameters when you make an API call.

    For the request format, see the request sample in the Examples section of this topic.

    Response elements

    Element

    Type

    Description

    Example

    object

    CreateCertificateResponse

    X509Certificate

    string

    The content of the client certificate.

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

    string

    The CA certificate chain.

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

    string

    The unique identifier of the client certificate.

    190ae6bb538d538c70c01f81dcf2****
    SerialNumber

    string

    The certificate serial number.

    084bde9cd233f0ddae33adc438cfbbbd****
    RequestId

    string

    The ID of the request. Alibaba Cloud generates a unique ID for each request. You can use the ID to troubleshoot issues.

    8C467B38-3910-447D-87BC-AC049166F216

    Examples

    Success response

    JSON format

    {
  "X509Certificate": "-----BEGIN CERTIFICATE-----\\n......\\n-----END CERTIFICATE-----",
  "CertificateChain": "-----BEGIN CERTIFICATE-----\\n......\\n-----END CERTIFICATE-----\\n-----BEGIN CERTIFICATE-----\\n......\\n-----END CERTIFICATE-----\\n",
  "Identifier": "190ae6bb538d538c70c01f81dcf2****",
  "SerialNumber": "084bde9cd233f0ddae33adc438cfbbbd****",
  "RequestId": "8C467B38-3910-447D-87BC-AC049166F216"
}

    Error codes

    See Error Codes for a complete list.

    Release notes

    See Release Notes for a complete list.