# Use `GetKeyPolicy` with an AWS SDK or CLI
<a name="example_kms_GetKeyPolicy_section"></a>

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

Action examples are code excerpts from larger programs and must be run in context. You can see this action in context in the following code example: 
+  [Learn the basics](example_kms_Scenario_Basics_section.md) 

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

**AWS CLI**  
**To copy a key policy from one KMS key to another KMS key**  
The following `get-key-policy` example gets the key policy from one KMS key and saves it in a text file. Then, it replaces the policy of a different KMS key using the text file as the policy input.  
Because the `--policy` parameter of `put-key-policy` requires a string, you must use the `--output text` option to return the output as a text string instead of JSON.  

```
aws kms get-key-policy \
    --policy-name default \
    --key-id 1234abcd-12ab-34cd-56ef-1234567890ab \
    --query Policy \
    --output text > policy.txt

aws kms put-key-policy \
    --policy-name default \
    --key-id 0987dcba-09fe-87dc-65ba-ab0987654321 \
    --policy file://policy.txt
```
This command produces no output.  
For more information, see [PutKeyPolicy](https://docs.aws.amazon.com/kms/latest/APIReference/API_PutKeyPolicy.html) in the *AWS KMS API Reference*.  
+  For API details, see [GetKeyPolicy](https://awscli.amazonaws.com/v2/documentation/api/latest/reference/kms/get-key-policy.html) in *AWS CLI Command 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 [AWS 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 get_policy(self, key_id: str) -> dict[str, str]:
        """
        Gets the policy of a key.

        :param key_id: The ARN or ID of the key to query.
        :return: The key policy as a dict.
        """
        if key_id != "":
            try:
                response = self.kms_client.get_key_policy(
                    KeyId=key_id,
                )
                policy = json.loads(response["Policy"])
            except ClientError as err:
                logger.error(
                    "Couldn't get policy for key %s. Here's why: %s",
                    key_id,
                    err.response["Error"]["Message"],
                )
                raise
            else:
                pprint(policy)
                return policy
        else:
            print("Skipping get policy demo.")
```
+  For API details, see [GetKeyPolicy](https://docs.aws.amazon.com/goto/boto3/kms-2014-11-01/GetKeyPolicy) in *AWS 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 [AWS 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->getkeypolicy(
          iv_keyid = iv_key_id
          iv_policyname = 'default'
        ).
        MESSAGE 'Retrieved key policy successfully.' 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 [GetKeyPolicy](https://docs.aws.amazon.com/sdk-for-sap-abap/v1/api/latest/index.html) in *AWS SDK for SAP ABAP API reference*. 

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