All Products
Search
Document Center

Certificate Management Service:CreateClientCertificate

Last Updated:Dec 22, 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 CA certificate and CreateSubCACertificate to create a subordinate CA certificate. Only subordinate CA certificates can issue client certificates.

QPS limit

The queries per second (QPS) limit for this operation is 10 calls per second for each user. If you exceed the limit, API calls are throttled. This may affect your business. Plan your 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 Subject Alternative Name (SAN) extension for the client certificate. Valid values:

  • 1: an email address.

  • 6: a Uniform Resource Identifier (URI).

1

SanValue

string

No

The content of the SAN extension. To specify multiple SANs, separate them with commas (,).

somebody@example.com

Organization

string

No

The name of the organization. The default value is Alibaba Inc.

阿里云

OrganizationUnit

string

No

The name of the department. The default value is Aliyun CDN.

IT

Country

string

No

The country code. The default value is CN.

CN

CommonName

string

No

The name of the certificate user. The user of a client authentication (ClientAuth) certificate is typically a person, company, organization, or an 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 characters and letters are supported. By default, this parameter is set to 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 characters and letters are supported. By default, this parameter is set to 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 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 encryption algorithm of the subordinate CA certificate, but 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

You can 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 this certificate.

Note

You can call [DescribeCACertificateList] to query the unique identifiers of subordinate CA certificates.

273ae6bb538d538c70c01f81jh2****

Years

integer

No

The validity period of the certificate. Unit: years.

5

Months

integer

No

The validity period of the certificate. Unit: months.

1

Days

integer

No

The validity period of the client certificate in days. The Days, BeforeTime, and AfterTime parameters cannot all be empty. The BeforeTime and AfterTime parameters must be specified together or both left empty. The following rules apply:

  • If you set the Days parameter, you can leave BeforeTime and AfterTime empty.

  • If you do not set the Days parameter, you must set both BeforeTime and AfterTime.

Note
  • If you set Days, BeforeTime, and AfterTime at the same time, the validity period is determined by the Days parameter.

  • The validity period of the client certificate cannot exceed that of the issuing subordinate CA certificate. You can call DescribeCACertificate to check the validity period of the subordinate CA certificate.

365

BeforeTime

integer

No

The issuance time of the client certificate. This 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 specified together or both left empty.

1634283958

AfterTime

integer

No

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

Note

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

1665819958

Immediately

integer

No

Specifies whether to immediately return the digital certificate.

  • 0: Does not return the certificate. This is the default value.

  • 1: Returns the certificate.

  • 2: Returns 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

A list of tags.

object

No

A 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

In addition to the parameters described in this topic, you must also include the common request parameters of Alibaba Cloud APIs. For the request format, see the request example in the Examples section.

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

Response elements

Element

Type

Description

Example

object

CreateCertificateResponse<CertificateIdentifierWithParentDto>

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. This ID is generated by Alibaba Cloud and is unique for each request. You can use this 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.