AWS Certificate Manager Private Certificate Authority
AWS Private Certificate Authority Documentation (API Version 2017-08-22)

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Creates a root or subordinate private certificate authority (CA). You must specify the CA configuration, the certificate revocation list (CRL) configuration, the CA type, and an optional idempotency token to avoid accidental creation of multiple CAs. The CA configuration specifies the name of the algorithm and key size to be used to create the CA private key, the type of signing algorithm that the CA uses, and X.500 subject information. The CRL configuration specifies the CRL expiration period in days (the validity period of the CRL), the Amazon S3 bucket that will contain the CRL, and a CNAME alias for the S3 bucket that is included in certificates issued by the CA. If successful, this action returns the Amazon Resource Name (ARN) of the CA.

Request Syntax

{ "CertificateAuthorityConfiguration": { "KeyAlgorithm": "string", "SigningAlgorithm": "string", "Subject": { "CommonName": "string", "Country": "string", "DistinguishedNameQualifier": "string", "GenerationQualifier": "string", "GivenName": "string", "Initials": "string", "Locality": "string", "Organization": "string", "OrganizationalUnit": "string", "Pseudonym": "string", "SerialNumber": "string", "State": "string", "Surname": "string", "Title": "string" } }, "CertificateAuthorityType": "string", "IdempotencyToken": "string", "RevocationConfiguration": { "CrlConfiguration": { "CustomCname": "string", "Enabled": boolean, "ExpirationInDays": number, "S3BucketName": "string" } }, "Tags": [ { "Key": "string", "Value": "string" } ] }

Request Parameters

For information about the parameters that are common to all actions, see Common Parameters.

The request accepts the following data in JSON format.


Name and bit size of the private key algorithm, the name of the signing algorithm, and X.500 certificate subject information.

Type: CertificateAuthorityConfiguration object

Required: Yes


The type of the certificate authority.

Type: String


Required: Yes


Alphanumeric string that can be used to distinguish between calls to CreateCertificateAuthority. Idempotency tokens time out after five minutes. Therefore, if you call CreateCertificateAuthority multiple times with the same idempotency token within a five minute period, ACM Private CA recognizes that you are requesting only one certificate. As a result, ACM Private CA issues only one. If you change the idempotency token for each call, however, ACM Private CA recognizes that you are requesting multiple certificates.

Type: String

Length Constraints: Minimum length of 1. Maximum length of 36.

Pattern: [\u0009\u000A\u000D\u0020-\u00FF]*

Required: No


Contains a Boolean value that you can use to enable a certification revocation list (CRL) for the CA, the name of the S3 bucket to which ACM Private CA will write the CRL, and an optional CNAME alias that you can use to hide the name of your bucket in the CRL Distribution Points extension of your CA certificate. For more information, see the CrlConfiguration structure.

Type: RevocationConfiguration object

Required: No


Key-value pairs that will be attached to the new private CA. You can associate up to 50 tags with a private CA. For information using tags with IAM to manage permissions, see Controlling Access Using IAM Tags.

Type: Array of Tag objects

Array Members: Minimum number of 1 item. Maximum number of 50 items.

Required: No

Response Syntax

{ "CertificateAuthorityArn": "string" }

Response Elements

If the action is successful, the service sends back an HTTP 200 response.

The following data is returned in JSON format by the service.


If successful, the Amazon Resource Name (ARN) of the certificate authority (CA). This is of the form:

arn:aws:acm-pca:region:account:certificate-authority/12345678-1234-1234-1234-123456789012 .

Type: String

Length Constraints: Minimum length of 5. Maximum length of 200.

Pattern: arn:[\w+=/,.@-]+:[\w+=/,.@-]+:[\w+=/,.@-]*:[0-9]*:[\w+=,.@-]+(/[\w+=/,.@-]+)*


For information about the errors that are common to all actions, see Common Errors.


One or more of the specified arguments was not valid.

HTTP Status Code: 400


The S3 bucket policy is not valid. The policy must give ACM Private CA rights to read from and write to the bucket and find the bucket location.

HTTP Status Code: 400


The tag associated with the CA is not valid. The invalid argument is contained in the message field.

HTTP Status Code: 400


An ACM Private CA limit has been exceeded. See the exception message returned to determine the limit that was exceeded.

HTTP Status Code: 400



Sample Request

POST / HTTP/1.1 Host: Accept-Encoding: identity Content-Length: 512 X-Amz-Target: ACMPrivateCA.CreateCertificateAuthority X-Amz-Date: 20180515T165448Z User-Agent: aws-cli/1.15.4 Python/2.7.9 Windows/8 botocore/1.10.4 Content-Type: application/x-amz-json-1.1 Authorization: AWS4-HMAC-SHA256 Credential=AWS_Access_Key_ID/20180515/AWS_Region/acm-pca/aws4_request, SignedHeaders=content-type;host;x-amz-date;x-amz-target, Signature=6fc58aaf789659cb4e0dd0ba484a2562d982b6b8edd56ea0c5c94c2af9aeafbe { "IdempotencyToken": "98256344", "CertificateAuthorityConfiguration": { "KeyAlgorithm": "RSA_2048", "SigningAlgorithm": "SHA256WITHRSA", "Subject": { "Locality": "Seattle", "Country": "US", "CommonName": "", "State": "WA", "Organization": "Example Ltd.", "OrganizationalUnit": "Corporate" } }, "CertificateAuthorityType": "SUBORDINATE", "RevocationConfiguration": { "CrlConfiguration": { "CustomCname": "CRL", "Enabled": true, "S3BucketName": "your-crl-bucket-name", "ExpirationInDays": 3650 } } }


Sample Response

HTTP/1.1 200 OK Date: Tue, 15 May 2018 16:54:56 GMT Content-Type: application/x-amz-json-1.1 Content-Length: 127 x-amzn-RequestId: eacb346a-d80b-4be6-a1b2-1732c3ae3c38 Connection: keep-alive { "CertificateAuthorityArn": "arn:aws:acm-pca:region:account:certificate-authority/12345678-1234-1234-1234-123456789012" }

See Also

For more information about using this API in one of the language-specific AWS SDKs, see the following: