iam: test cross-account policy with assumed role

Signed-off-by: Casey Bodley <cbodley@redhat.com>
This commit is contained in:
Casey Bodley 2024-02-21 09:36:06 -05:00
parent 7ebc530e04
commit a3a16eb66a

View file

@ -2301,6 +2301,288 @@ def test_account_role_policy_allow(iam_root):
# something other than AccessDenied # something other than AccessDenied
retry_on('AccessDenied', 10, s3.list_buckets) retry_on('AccessDenied', 10, s3.list_buckets)
# alt account user assumes main account role to access main account bucket
@pytest.mark.iam_account
@pytest.mark.iam_cross_account
@pytest.mark.iam_role
@pytest.mark.role_policy
def test_same_account_role_policy_allow(iam_root, iam_alt_root):
path = get_iam_path_prefix()
user_name = make_iam_name('AltUser')
role_name = make_iam_name('MyRole')
session_name = 'MySession'
bucket_name = get_new_bucket_name()
user = iam_alt_root.create_user(UserName=user_name, Path=path)['User']
user_arn = user['Arn']
key = iam_alt_root.create_access_key(UserName=user_name)['AccessKey']
s3_main = get_iam_root_client(service_name='s3')
s3_main.create_bucket(Bucket=bucket_name)
trust_policy = json.dumps({
'Version': '2012-10-17',
'Statement': [{
'Effect': 'Allow',
'Action': 'sts:AssumeRole',
'Principal': {'AWS': user_arn}
}]
})
# returns MalformedPolicyDocument until the user arn starts working
role = retry_on('MalformedPolicyDocument', 10, iam_root.create_role,
RoleName=role_name, Path=path, AssumeRolePolicyDocument=trust_policy)['Role']
role_arn = role['Arn']
sts = get_sts_client(aws_access_key_id=key['AccessKeyId'],
aws_secret_access_key=key['SecretAccessKey'])
# returns InvalidClientTokenId or AccessDenied until the access key starts working
response = retry_on(('InvalidClientTokenId', 'AccessDenied'), 10, sts.assume_role,
RoleArn=role_arn, RoleSessionName=session_name)
creds = response['Credentials']
s3 = get_iam_s3client(aws_access_key_id = creds['AccessKeyId'],
aws_secret_access_key = creds['SecretAccessKey'],
aws_session_token = creds['SessionToken'])
# expect AccessDenied because no identity policy allows s3 actions
e = assert_raises(ClientError, s3.list_objects, Bucket=bucket_name)
status, error_code = _get_status_and_error_code(e.response)
assert status == 403
assert error_code == 'AccessDenied'
policy_name = 'AllowListBucket'
policy = json.dumps({
'Version': '2012-10-17',
'Statement': [{
'Effect': 'Allow',
'Action': 's3:ListBucket',
'Resource': '*'
}]
})
iam_root.put_role_policy(RoleName=role_name, PolicyName=policy_name, PolicyDocument=policy)
# the policy may take a bit to start working. retry until it returns
# something other than AccessDenied
retry_on('AccessDenied', 10, s3.list_objects, Bucket=bucket_name)
# alt account user assumes main account role to access alt account bucket
@pytest.mark.iam_account
@pytest.mark.iam_cross_account
@pytest.mark.iam_role
@pytest.mark.role_policy
def test_cross_account_role_policy_allow(iam_root, iam_alt_root):
path = get_iam_path_prefix()
user_name = make_iam_name('AltUser')
role_name = make_iam_name('MyRole')
session_name = 'MySession'
bucket_name = get_new_bucket_name()
user = iam_alt_root.create_user(UserName=user_name, Path=path)['User']
user_arn = user['Arn']
key = iam_alt_root.create_access_key(UserName=user_name)['AccessKey']
s3_alt = get_iam_alt_root_client(service_name='s3')
s3_alt.create_bucket(Bucket=bucket_name)
trust_policy = json.dumps({
'Version': '2012-10-17',
'Statement': [{
'Effect': 'Allow',
'Action': 'sts:AssumeRole',
'Principal': {'AWS': user_arn}
}]
})
# returns MalformedPolicyDocument until the user arn starts working
role = retry_on('MalformedPolicyDocument', 10, iam_root.create_role,
RoleName=role_name, Path=path, AssumeRolePolicyDocument=trust_policy)['Role']
role_arn = role['Arn']
sts = get_sts_client(aws_access_key_id=key['AccessKeyId'],
aws_secret_access_key=key['SecretAccessKey'])
# returns InvalidClientTokenId or AccessDenied until the access key starts working
response = retry_on(('InvalidClientTokenId', 'AccessDenied'), 10, sts.assume_role,
RoleArn=role_arn, RoleSessionName=session_name)
creds = response['Credentials']
s3 = get_iam_s3client(aws_access_key_id = creds['AccessKeyId'],
aws_secret_access_key = creds['SecretAccessKey'],
aws_session_token = creds['SessionToken'])
# expect AccessDenied because no identity policy allows s3 actions
e = assert_raises(ClientError, s3.list_objects, Bucket=bucket_name)
status, error_code = _get_status_and_error_code(e.response)
assert status == 403
assert error_code == 'AccessDenied'
policy_name = 'AllowListBucket'
policy = json.dumps({
'Version': '2012-10-17',
'Statement': [{
'Effect': 'Allow',
'Action': 's3:ListBucket',
'Resource': '*'
}]
})
iam_root.put_role_policy(RoleName=role_name, PolicyName=policy_name, PolicyDocument=policy)
# expect AccessDenied because no resource policy allows the main account
e = assert_raises(ClientError, s3.list_objects, Bucket=bucket_name)
status, error_code = _get_status_and_error_code(e.response)
assert status == 403
assert error_code == 'AccessDenied'
# add a bucket policy that allows s3:ListBucket for the main account's arn
main_arn = iam_root.get_user()['User']['Arn']
s3_alt.put_bucket_policy(Bucket=bucket_name, Policy=json.dumps({
'Version': '2012-10-17',
'Statement': [{
'Effect': 'Allow',
'Principal': {'AWS': main_arn},
'Action': 's3:ListBucket',
'Resource': f'arn:aws:s3:::{bucket_name}'
}]
}))
# the policy may take a bit to start working. retry until it returns
# something other than AccessDenied
retry_on('AccessDenied', 10, s3.list_objects, Bucket=bucket_name)
# alt account user assumes main account role to create a bucket
@pytest.mark.iam_account
@pytest.mark.iam_cross_account
@pytest.mark.iam_role
@pytest.mark.role_policy
def test_account_role_policy_allow_create_bucket(iam_root, iam_alt_root):
path = get_iam_path_prefix()
user_name = make_iam_name('AltUser')
role_name = make_iam_name('MyRole')
session_name = 'MySession'
bucket_name = get_new_bucket_name()
user = iam_alt_root.create_user(UserName=user_name, Path=path)['User']
user_arn = user['Arn']
key = iam_alt_root.create_access_key(UserName=user_name)['AccessKey']
trust_policy = json.dumps({
'Version': '2012-10-17',
'Statement': [{
'Effect': 'Allow',
'Action': 'sts:AssumeRole',
'Principal': {'AWS': user_arn}
}]
})
# returns MalformedPolicyDocument until the user arn starts working
role = retry_on('MalformedPolicyDocument', 10, iam_root.create_role,
RoleName=role_name, Path=path, AssumeRolePolicyDocument=trust_policy)['Role']
role_arn = role['Arn']
sts = get_sts_client(aws_access_key_id=key['AccessKeyId'],
aws_secret_access_key=key['SecretAccessKey'])
# returns InvalidClientTokenId or AccessDenied until the access key starts working
response = retry_on(('InvalidClientTokenId', 'AccessDenied'), 10, sts.assume_role,
RoleArn=role_arn, RoleSessionName=session_name)
creds = response['Credentials']
s3 = get_iam_s3client(aws_access_key_id = creds['AccessKeyId'],
aws_secret_access_key = creds['SecretAccessKey'],
aws_session_token = creds['SessionToken'])
# expect AccessDenied because no identity policy allows s3 actions
e = assert_raises(ClientError, s3.create_bucket, Bucket=bucket_name, ObjectOwnership='ObjectWriter', ACL='private')
status, error_code = _get_status_and_error_code(e.response)
assert status == 403
assert error_code == 'AccessDenied'
policy_name = 'AllowCreateBucket'
policy = json.dumps({
'Version': '2012-10-17',
'Statement': [{
'Effect': 'Allow',
'Action': ['s3:CreateBucket', 's3:PutBucketAcl'],
'Resource': '*'
}]
})
iam_root.put_role_policy(RoleName=role_name, PolicyName=policy_name, PolicyDocument=policy)
# the policy may take a bit to start working. retry until it returns
# something other than AccessDenied
retry_on('AccessDenied', 10, s3.create_bucket, Bucket=bucket_name, ObjectOwnership='ObjectWriter', ACL='private')
# verify that the bucket is owned by the role's account
s3_main = get_iam_root_client(service_name='s3')
response = s3_main.get_bucket_acl(Bucket=bucket_name)
main_arn = iam_root.get_user()['User']['Arn']
account_id = main_arn.removeprefix('arn:aws:iam::').removesuffix(':root')
assert response['Owner']['ID'] == account_id
assert response['Grants'][0]['Grantee']['ID'] == account_id
# alt account user assumes main account role to read the role info
@pytest.mark.iam_account
@pytest.mark.iam_cross_account
@pytest.mark.iam_role
@pytest.mark.role_policy
def test_account_role_policy_allow_get_role(iam_root, iam_alt_root):
path = get_iam_path_prefix()
user_name = make_iam_name('AltUser')
role_name = make_iam_name('MyRole')
session_name = 'MySession'
bucket_name = get_new_bucket_name()
user = iam_alt_root.create_user(UserName=user_name, Path=path)['User']
user_arn = user['Arn']
key = iam_alt_root.create_access_key(UserName=user_name)['AccessKey']
trust_policy = json.dumps({
'Version': '2012-10-17',
'Statement': [{
'Effect': 'Allow',
'Action': 'sts:AssumeRole',
'Principal': {'AWS': user_arn}
}]
})
# returns MalformedPolicyDocument until the user arn starts working
role = retry_on('MalformedPolicyDocument', 10, iam_root.create_role,
RoleName=role_name, Path=path, AssumeRolePolicyDocument=trust_policy)['Role']
role_arn = role['Arn']
sts = get_sts_client(aws_access_key_id=key['AccessKeyId'],
aws_secret_access_key=key['SecretAccessKey'])
# returns InvalidClientTokenId or AccessDenied until the access key starts working
response = retry_on(('InvalidClientTokenId', 'AccessDenied'), 10, sts.assume_role,
RoleArn=role_arn, RoleSessionName=session_name)
creds = response['Credentials']
iam = get_iam_root_client(service_name='iam',
aws_access_key_id = creds['AccessKeyId'],
aws_secret_access_key = creds['SecretAccessKey'],
aws_session_token = creds['SessionToken'])
# expect AccessDenied because no identity policy allows iam actions
e = assert_raises(ClientError, iam.get_role, RoleName=role_name)
status, error_code = _get_status_and_error_code(e.response)
assert status == 403
assert error_code == 'AccessDenied'
policy_name = 'AllowGetRole'
policy = json.dumps({
'Version': '2012-10-17',
'Statement': [{
'Effect': 'Allow',
'Action': 'iam:GetRole',
'Resource': '*'
}]
})
iam_root.put_role_policy(RoleName=role_name, PolicyName=policy_name, PolicyDocument=policy)
# the policy may take a bit to start working. retry until it returns
# something other than AccessDenied
retry_on('AccessDenied', 10, iam.get_role, RoleName=role_name)
# IAM OpenIDConnectProvider apis # IAM OpenIDConnectProvider apis
@pytest.mark.iam_account @pytest.mark.iam_account