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#
# Licensed under the Apache License, Version 2.0 (the "License"). You
# may not use this file except in compliance with the License. A copy of
# the License is located at
#
# http://aws.amazon.com/apache2.0/
#
# or in the "license" file accompanying this file. This file is
# distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF
# ANY KIND, either express or implied. See the License for the specific
# language governing permissions and limitations under the License.
from __future__ import absolute_import
import contextlib
import json
from sagemaker import utils
PRINCIPAL_TEMPLATE = (
'["{account_id}", "{role_arn}", ' '"arn:{partition}:iam::{account_id}:role/{sagemaker_role}"] '
)
KEY_ALIAS = "SageMakerTestKMSKey"
KMS_S3_ALIAS = "SageMakerTestS3KMSKey"
POLICY_NAME = "default"
KEY_POLICY = """
{{
"Version": "2012-10-17",
"Id": "{id}",
"Statement": [
{{
"Sid": "Enable IAM User Permissions",
"Effect": "Allow",
"Principal": {{
"AWS": {principal}
}},
"Action": "kms:*",
"Resource": "*"
}}
]
}}
"""
def _get_kms_key_arn(kms_client, alias):
try:
response = kms_client.describe_key(KeyId="alias/" + alias)
return response["KeyMetadata"]["Arn"]
except kms_client.exceptions.NotFoundException:
return None
def _get_kms_key_id(kms_client, alias):
try:
response = kms_client.describe_key(KeyId="alias/" + alias)
return response["KeyMetadata"]["KeyId"]
except kms_client.exceptions.NotFoundException:
return None
def _create_kms_key(
kms_client, account_id, region, role_arn=None, sagemaker_role="SageMakerRole", alias=KEY_ALIAS
):
if role_arn:
principal = PRINCIPAL_TEMPLATE.format(
partition=utils._aws_partition(region),
account_id=account_id,
role_arn=role_arn,
sagemaker_role=sagemaker_role,
)
else:
principal = '"{account_id}"'.format(account_id=account_id)
response = kms_client.create_key(
Policy=KEY_POLICY.format(
id=POLICY_NAME, principal=principal, sagemaker_role=sagemaker_role
),
Description="KMS key for SageMaker Python SDK integ tests",
)
key_arn = response["KeyMetadata"]["Arn"]
if alias:
kms_client.create_alias(AliasName="alias/" + alias, TargetKeyId=key_arn)
return key_arn
def _add_role_to_policy(
kms_client, account_id, role_arn, region, alias=KEY_ALIAS, sagemaker_role="SageMakerRole"
):
key_id = _get_kms_key_id(kms_client, alias)
policy = kms_client.get_key_policy(KeyId=key_id, PolicyName=POLICY_NAME)
policy = json.loads(policy["Policy"])
principal = policy["Statement"][0]["Principal"]["AWS"]
if role_arn not in principal or sagemaker_role not in principal:
principal = PRINCIPAL_TEMPLATE.format(
partition=utils._aws_partition(region),
account_id=account_id,
role_arn=role_arn,
sagemaker_role=sagemaker_role,
)
kms_client.put_key_policy(
KeyId=key_id,
PolicyName=POLICY_NAME,
Policy=KEY_POLICY.format(id=POLICY_NAME, principal=principal),
)
def get_or_create_kms_key(
sagemaker_session, role_arn=None, alias=KEY_ALIAS, sagemaker_role="SageMakerRole"
):
kms_client = sagemaker_session.boto_session.client("kms")
kms_key_arn = _get_kms_key_arn(kms_client, alias)
region = sagemaker_session.boto_region_name
sts_client = sagemaker_session.boto_session.client(
"sts", region_name=region, endpoint_url=utils.sts_regional_endpoint(region)
)
account_id = sts_client.get_caller_identity()["Account"]
if kms_key_arn is None:
return _create_kms_key(kms_client, account_id, region, role_arn, sagemaker_role, alias)
if role_arn:
_add_role_to_policy(kms_client, account_id, role_arn, region, alias, sagemaker_role)
return kms_key_arn
KMS_BUCKET_POLICY = """{{
"Version": "2012-10-17",
"Id": "PutObjPolicy",
"Statement": [
{{
"Sid": "DenyIncorrectEncryptionHeader",
"Effect": "Deny",
"Principal": "*",
"Action": "s3:PutObject",
"Resource": "arn:{partition}:s3:::{bucket_name}/*",
"Condition": {{
"StringNotEquals": {{
"s3:x-amz-server-side-encryption": "aws:kms"
}}
}}
}},
{{
"Sid": "DenyUnEncryptedObjectUploads",
"Effect": "Deny",
"Principal": "*",
"Action": "s3:PutObject",
"Resource": "arn:{partition}:s3:::{bucket_name}/*",
"Condition": {{
"Null": {{
"s3:x-amz-server-side-encryption": "true"
}}
}}
}}
]
}}"""
@contextlib.contextmanager
def bucket_with_encryption(sagemaker_session, sagemaker_role):
boto_session = sagemaker_session.boto_session
region = boto_session.region_name
sts_client = boto_session.client(
"sts", region_name=region, endpoint_url=utils.sts_regional_endpoint(region)
)
account = sts_client.get_caller_identity()["Account"]
role_arn = sts_client.get_caller_identity()["Arn"]
kms_client = boto_session.client("kms", region_name=region)
kms_key_arn = _create_kms_key(kms_client, account, region, role_arn, sagemaker_role, None)
region = boto_session.region_name
bucket_name = "sagemaker-{}-{}-with-kms".format(region, account)
sagemaker_session._create_s3_bucket_if_it_does_not_exist(bucket_name=bucket_name, region=region)
s3_client = boto_session.client("s3", region_name=region)
s3_client.put_bucket_encryption(
Bucket=bucket_name,
ServerSideEncryptionConfiguration={
"Rules": [
{
"ApplyServerSideEncryptionByDefault": {
"SSEAlgorithm": "aws:kms",
"KMSMasterKeyID": kms_key_arn,
}
}
]
},
)
s3_client.put_bucket_policy(
Bucket=bucket_name,
Policy=KMS_BUCKET_POLICY.format(
partition=utils._aws_partition(region), bucket_name=bucket_name
),
)
yield "s3://" + bucket_name, kms_key_arn
kms_client.schedule_key_deletion(KeyId=kms_key_arn, PendingWindowInDays=7)
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