Request Syntax Request Parameters Response Syntax Response Elements Errors Examples See Also

CreatePolicyTemplate

Creates a policy template. A template can use placeholders for the principal and resource. A template must be instantiated into a policy by associating it with specific principals and resources to use for the placeholders. That instantiated policy can then be considered in authorization decisions. The instantiated policy works identically to any other policy, except that it is dynamically linked to the template. If the template changes, then any policies that are linked to that template are immediately updated as well.

Note

Verified Permissions is eventually consistent . It can take a few seconds for a new or changed element to propagate through the service and be visible in the results of other Verified Permissions operations.

Request Syntax


{
   "clientToken": "string",
   "description": "string",
   "policyStoreId": "string",
   "statement": "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.

Note

In the following list, the required parameters are described first.

policyStoreId

The ID of the policy store in which to create the policy template.

Type: String

Length Constraints: Minimum length of 1. Maximum length of 200.

Pattern: [a-zA-Z0-9-]*

Required: Yes

statement

Specifies the content that you want to use for the new policy template, written in the Cedar policy language.

Type: String

Length Constraints: Minimum length of 1. Maximum length of 10000.

Required: Yes

clientToken

Specifies a unique, case-sensitive ID that you provide to ensure the idempotency of the request. This lets you safely retry the request without accidentally performing the same operation a second time. Passing the same value to a later call to an operation requires that you also pass the same value for all other parameters. We recommend that you use a UUID type of value..

If you don't provide this value, then AWS generates a random one for you.

If you retry the operation with the same ClientToken, but with different parameters, the retry fails with an ConflictException error.

Verified Permissions recognizes a ClientToken for eight hours. After eight hours, the next request with the same parameters performs the operation again regardless of the value of ClientToken.

Type: String

Length Constraints: Minimum length of 1. Maximum length of 64.

Pattern: [a-zA-Z0-9-]*

Required: No

description

Specifies a description for the policy template.

Type: String

Length Constraints: Minimum length of 0. Maximum length of 150.

Required: No

Response Syntax


{
   "createdDate": "string",
   "lastUpdatedDate": "string",
   "policyStoreId": "string",
   "policyTemplateId": "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.

createdDate

The date and time the policy template was originally created.

Type: Timestamp

lastUpdatedDate

The date and time the policy template was most recently updated.

Type: Timestamp

policyStoreId

The ID of the policy store that contains the policy template.

Type: String

Length Constraints: Minimum length of 1. Maximum length of 200.

Pattern: [a-zA-Z0-9-]*

policyTemplateId

The unique ID of the new policy template.

Type: String

Length Constraints: Minimum length of 1. Maximum length of 200.

Pattern: [a-zA-Z0-9-]*

Errors

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

AccessDeniedException

You don't have sufficient access to perform this action.

HTTP Status Code: 400

ConflictException

The request failed because another request to modify a resource occurred at the same.

HTTP Status Code: 400

InternalServerException

The request failed because of an internal error. Try your request again later

HTTP Status Code: 500

ResourceNotFoundException

The request failed because it references a resource that doesn't exist.

HTTP Status Code: 400

ServiceQuotaExceededException

The request failed because it would cause a service quota to be exceeded.

HTTP Status Code: 400

ThrottlingException

The request failed because it exceeded a throttling quota.

HTTP Status Code: 400

ValidationException

The request failed because one or more input parameters don't satisfy their constraint requirements. The output is provided as a list of fields and a reason for each field that isn't valid.

The possible reasons include the following:

UnrecognizedEntityType

The policy includes an entity type that isn't found in the schema.
UnrecognizedActionId

The policy includes an action id that isn't found in the schema.
InvalidActionApplication

The policy includes an action that, according to the schema, doesn't support the specified principal and resource.
UnexpectedType

The policy included an operand that isn't a valid type for the specified operation.
IncompatibleTypes

The types of elements included in a set, or the types of expressions used in an if...then...else clause aren't compatible in this context.
MissingAttribute

The policy attempts to access a record or entity attribute that isn't specified in the schema. Test for the existence of the attribute first before attempting to access its value. For more information, see the has (presence of attribute test) operator in the Cedar Policy Language Guide.
UnsafeOptionalAttributeAccess

The policy attempts to access a record or entity attribute that is optional and isn't guaranteed to be present. Test for the existence of the attribute first before attempting to access its value. For more information, see the has (presence of attribute test) operator in the Cedar Policy Language Guide.
ImpossiblePolicy

Cedar has determined that a policy condition always evaluates to false. If the policy is always false, it can never apply to any query, and so it can never affect an authorization decision.
WrongNumberArguments

The policy references an extension type with the wrong number of arguments.
FunctionArgumentValidationError

Cedar couldn't parse the argument passed to an extension type. For example, a string that is to be parsed as an IPv4 address can contain only digits and the period character.

HTTP Status Code: 400

Examples

Example

The following example creates a policy template that has a placeholder for the principal.

Note

The JSON in the parameters of this operation are strings that can contain embedded quotation marks (") within the outermost quotation mark pair. This requires that you stringify the JSON object by preceding all embedded quotation marks with a backslash character ( \" ) and combining all lines into a single text line with no line breaks.

Example strings are displayed wrapped across multiple lines here for readability, but the operation requires the parameters be submitted as single line strings.

Sample Request


POST HTTP/1.1
Host: verifiedpermissions.us-east-1.amazonaws.com
X-Amz-Date: 20230613T200059Z
Accept-Encoding: identity
X-Amz-Target: VerifiedPermissions.CreatePolicyTemplate
User-Agent: <UserAgentString>
Authorization: AWS4-HMAC-SHA256 Credential=<Credential>, SignedHeaders=<Headers>, Signature=<Signature>
Content-Length: <PayloadSizeBytes>

{
    "description": "Template for research dept", 
    "policyStoreId": "PSEXAMPLEabcdefg111111", 
    "statement": "\"AccessVacation\"\npermit(\n    principal in ?principal,\n    action == Action::\"view\",\n    resource == Photo::\"VacationPhoto94.jpg\"\n)\nwhen {\n    principal has department && principal.department == \"research\"\n};",
    "clientToken": "a1b2c3d4-e5f6-a1b2-c3d4-TOKEN1111111"}

Sample Response


HTTP/1.1 200 OK
Date: Tue, 13 Jun 2023 20:00:59 GMT
Content-Type: application/x-amz-json-1.0
Content-Length: <PayloadSizeBytes>
vary: origin
vary: access-control-request-method
vary: access-control-request-headers
x-amzn-requestid: a1b2c3d4-e5f6-a1b2-c3d4-EXAMPLE11111
Connection: keep-alive

{
    "policyStoreId":"PSEXAMPLEabcdefg111111",
    "policyTemplateId":"PTEXAMPLEabcdefg111111",
    "createdDate":"2023-05-17T18:58:48.795411Z",
    "lastUpdatedDate":"2023-05-17T18:58:48.795411Z"
}