与 Amazon SDK或GetKeyPolicy一起使用 CLI

将密钥策略从一个密KMS钥复制到另一个KMS密钥

以下get-key-policy示例从一个密钥中获取KMS密钥策略并将其保存在文本文件中。然后，它使用文本文件作为策略输入替换另一个KMS密钥的策略。

由于的--policy参数put-key-policy需要字符串，因此必须使用--output text选项将输出作为文本字符串返回，而不是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

此命令不生成任何输出。

有关更多信息，请参阅 “Amazon KMSAPI参考” PutKeyPolicy中的。

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.")