# Use `ListKeyPolicies` with an Amazon SDK or CLI
<a name="example_kms_ListKeyPolicies_section"></a>

The following code examples show how to use `ListKeyPolicies`.

------
#### [ CLI ]

**Amazon CLI**  
**To get the names of key policies for a KMS key**  
The following `list-key-policies` example gets the names of the key policies for a customer managed key in the example account and Region. You can use this command to find the names of key policies for Amazon managed keys and customer managed keys.  
Because the only valid key policy name is `default`, this command is not useful.  
To specify the KMS key, use the `key-id` parameter. This example uses a key ID value, but you can use a key ID or key ARN in this command.  

```
aws kms list-key-policies \
    --key-id {{a1b2c3d4-5678-90ab-cdef-EXAMPLE11111}}
```
Output:  

```
{
    "PolicyNames": [
    "default"
    ]
}
```
For more information about Amazon KMS key policies, see [Using Key Policies in Amazon KMS](https://docs.aws.amazon.com/kms/latest/developerguide/key-policies.html) in the *Amazon Key Management Service Developer Guide*.  
+  For API details, see [ListKeyPolicies](https://awscli.amazonaws.com/v2/documentation/api/latest/reference/kms/list-key-policies.html) in *Amazon CLI Command Reference*. 

------
#### [ Java ]

**SDK for Java 2.x**  
 There's more on GitHub. Find the complete example and learn how to set up and run in the [Amazon Code Examples Repository](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/javav2/example_code/kms#code-examples). 

```
    /**
     * Asynchronously retrieves the key policy for the specified key ID and policy name.
     *
     * @param keyId       the ID of the AWS KMS key for which to retrieve the policy
     * @param policyName the name of the key policy to retrieve
     * @return a {@link CompletableFuture} that, when completed, contains the key policy as a {@link String}
     */
    public CompletableFuture<String> getKeyPolicyAsync(String keyId, String policyName) {
        GetKeyPolicyRequest policyRequest = GetKeyPolicyRequest.builder()
            .keyId(keyId)
            .policyName(policyName)
            .build();

        return getAsyncClient().getKeyPolicy(policyRequest)
            .thenApply(response -> {
                String policy = response.policy();
                logger.info("The response is: " + policy);
                return policy;
            })
            .exceptionally(ex -> {
                throw new RuntimeException("Failed to get key policy", ex);
            });
    }
```
+  For API details, see [ListKeyPolicies](https://docs.amazonaws.cn/goto/SdkForJavaV2/kms-2014-11-01/ListKeyPolicies) in *Amazon SDK for Java 2.x API Reference*. 

------
#### [ Python ]

**SDK for Python (Boto3)**  
 There's more on GitHub. Find the complete example and learn how to set up and run in the [Amazon Code Examples Repository](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/python/example_code/kms#code-examples). 

```
class KeyPolicy:
    def __init__(self, kms_client):
        self.kms_client = kms_client

    @classmethod
    def from_client(cls) -> "KeyPolicy":
        """
        Creates a KeyPolicy instance with a default KMS client.

        :return: An instance of KeyPolicy initialized with the default KMS client.
        """
        kms_client = boto3.client("kms")
        return cls(kms_client)


    def list_policies(self, key_id):
        """
        Lists the names of the policies for a key.

        :param key_id: The ARN or ID of the key to query.
        """
        try:
            policy_names = self.kms_client.list_key_policies(KeyId=key_id)[
                "PolicyNames"
            ]
        except ClientError as err:
            logging.error(
                "Couldn't list your policies. Here's why: %s",
                err.response["Error"]["Message"],
            )
            raise
        else:
            print(f"The policies for key {key_id} are:")
            pprint(policy_names)
```
+  For API details, see [ListKeyPolicies](https://docs.amazonaws.cn/goto/boto3/kms-2014-11-01/ListKeyPolicies) in *Amazon SDK for Python (Boto3) API Reference*. 

------
#### [ SAP ABAP ]

**SDK for SAP ABAP**  
 There's more on GitHub. Find the complete example and learn how to set up and run in the [Amazon Code Examples Repository](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/sap-abap/services/kms#code-examples). 

```
    TRY.
        " iv_key_id = 'arn:aws:kms:us-east-1:123456789012:key/1234abcd-12ab-34cd-56ef-1234567890ab'
        oo_result = lo_kms->listkeypolicies( iv_keyid = iv_key_id ).
        MESSAGE 'Retrieved key policies list.' TYPE 'I'.
      CATCH /aws1/cx_kmsnotfoundexception.
        MESSAGE 'Key not found.' TYPE 'E'.
      CATCH /aws1/cx_kmskmsinternalex.
        MESSAGE 'An internal error occurred.' TYPE 'E'.
    ENDTRY.
```
+  For API details, see [ListKeyPolicies](https://docs.amazonaws.cn/sdk-for-sap-abap/v1/api/latest/index.html) in *Amazon SDK for SAP ABAP API reference*. 

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For a complete list of Amazon SDK developer guides and code examples, see [Using this service with an Amazon SDK](sdk-general-information-section.md). This topic also includes information about getting started and details about previous SDK versions.