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Certificate Management Service:CreateCsr

Last Updated:Mar 13, 2026

Creates a certificate signing request (CSR) that contains information about an SSL certificate to apply for, such as the domain names and the certificate holder. You must provide a CSR when you submit a certificate application to a certificate authority (CA).

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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:CreateCsr

create

*All Resource

*

None None

Request parameters

Parameter

Type

Required

Description

Example

KeySize

integer

Yes

The key length that is used by the algorithm.

  • The key length for RSA algorithms can be 2,048, 3,072, and 4,096 bits.

  • The key length for ECC and SM2 algorithms can be 256 bits.

2048

Algorithm

string

Yes

The algorithm. Valid values: RSA, SM2, and ECC. For more information about algorithms, see Select an SSL certificate.

Valid values:

  • RSA :

    RSA

  • ECC :

    ECC

  • SM2 :

    SM2

RSA

CommonName

string

Yes

The primary domain name, which is a common name.

123.com

Sans

string

No

The secondary domain names. Separate multiple domain names with commas (,). You can use the CSR to apply for a certificate for both the primary and secondary domain names.

www.example.com,www.aliyundoc.com

CountryCode

string

Yes

The code of the country or region in which the organization is located. For example, you can use CN to indicate China and use US to indicate the United States.

CN

Province

string

Yes

The province or location where the company is located.

Beijing

Locality

string

Yes

The city where the company is located.

Beijing

CorpName

string

No

The name of the company.

aly

Name

string

No

The name of the CSR. The name can be up to 50 characters in length and can contain letters, digits, underscores (_), hyphens (-), and periods (.).

csr-123

Department

string

No

The department that uses the certificate.

IT

Response elements

Element

Type

Description

Example

object

The response parameters.

Csr

string

The content of the CSR.

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

RequestId

string

The request ID.

12345678-1234-1234-1234-123456789ABC

CsrId

integer

The unique identifier of the CSR. You can use this value to obtain the content of the CSR. For more information about the operation that you can call to obtain the content of a CSR, see GetCsrDetail.

3365

Examples

Success response

JSON format

{
  "Csr": "-----BEGIN CERTIFICATE REQUEST----- ...... -----END CERTIFICATE REQUEST-----",
  "RequestId": "12345678-1234-1234-1234-123456789ABC",
  "CsrId": 3365
}

Error codes

See Error Codes for a complete list.

Release notes

See Release Notes for a complete list.