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import unittest
from base64 import b64encode
import boto3
from moto import mock_aws
from moto.core import DEFAULT_ACCOUNT_ID as ACCOUNT_ID
@mock_aws
class TestStsAssumeRole(unittest.TestCase):
def setUp(self) -> None:
self.account_b = "111111111111"
self.sts = boto3.client("sts", region_name="us-east-1")
def test_assume_role_in_different_account(self):
# assume role to another aws account
role_name = f"arn:aws:iam::{self.account_b}:role/my-role"
response = self.sts.assume_role(
RoleArn=role_name,
RoleSessionName="test-session-name",
ExternalId="test-external-id",
)
# Assume the new role
sts_account_b = boto3.client(
"sts",
aws_access_key_id=response["Credentials"]["AccessKeyId"],
aws_secret_access_key=response["Credentials"]["SecretAccessKey"],
aws_session_token=response["Credentials"]["SessionToken"],
region_name="us-east-1",
)
assumed_arn = sts_account_b.get_caller_identity()["Arn"]
assert assumed_arn == (
f"arn:aws:sts::{self.account_b}:assumed-role/my-role/test-session-name"
)
iam_account_b = boto3.client(
"iam",
aws_access_key_id=response["Credentials"]["AccessKeyId"],
aws_secret_access_key=response["Credentials"]["SecretAccessKey"],
aws_session_token=response["Credentials"]["SessionToken"],
region_name="us-east-1",
)
# Verify new users belong to the different account
user = iam_account_b.create_user(UserName="user-in-new-account")["User"]
assert user["Arn"] == (
f"arn:aws:iam::{self.account_b}:user/user-in-new-account"
)
def test_assume_role_with_saml_in_different_account(self):
role_name = "test-role"
provider_name = "TestProvFed"
fed_identifier = "7ca82df9-1bad-4dd3-9b2b-adb68b554282"
fed_name = "testuser"
role_input = f"arn:aws:iam::{self.account_b}:role/{role_name}"
principal_role = f"arn:aws:iam:{ACCOUNT_ID}:saml-provider/{provider_name}"
saml_assertion = f"""<?xml version="1.0"?>
<samlp:Response xmlns:samlp="urn:oasis:names:tc:SAML:2.0:protocol" ID="_00000000-0000-0000-0000-000000000000" Version="2.0" IssueInstant="2012-01-01T12:00:00.000Z" Destination="https://signin.aws.amazon.com/saml" Consent="urn:oasis:names:tc:SAML:2.0:consent:unspecified">
<Issuer xmlns="urn:oasis:names:tc:SAML:2.0:assertion">http://localhost/</Issuer>
<samlp:Status>
<samlp:StatusCode Value="urn:oasis:names:tc:SAML:2.0:status:Success"/>
</samlp:Status>
<Assertion xmlns="urn:oasis:names:tc:SAML:2.0:assertion" ID="_00000000-0000-0000-0000-000000000000" IssueInstant="2012-12-01T12:00:00.000Z" Version="2.0">
<Issuer>http://localhost:3000/</Issuer>
<ds:Signature xmlns:ds="http://www.w3.org/2000/09/xmldsig#">
<ds:SignedInfo>
<ds:CanonicalizationMethod Algorithm="http://www.w3.org/2001/10/xml-exc-c14n#"/>
<ds:SignatureMethod Algorithm="http://www.w3.org/2001/04/xmldsig-more#rsa-sha256"/>
<ds:Reference URI="#_00000000-0000-0000-0000-000000000000">
<ds:Transforms>
<ds:Transform Algorithm="http://www.w3.org/2000/09/xmldsig#enveloped-signature"/>
<ds:Transform Algorithm="http://www.w3.org/2001/10/xml-exc-c14n#"/>
</ds:Transforms>
<ds:DigestMethod Algorithm="http://www.w3.org/2001/04/xmlenc#sha256"/>
<ds:DigestValue>NTIyMzk0ZGI4MjI0ZjI5ZGNhYjkyOGQyZGQ1NTZjODViZjk5YTY4ODFjOWRjNjkyYzZmODY2ZDQ4NjlkZjY3YSAgLQo=</ds:DigestValue>
</ds:Reference>
</ds:SignedInfo>
<ds:SignatureValue>NTIyMzk0ZGI4MjI0ZjI5ZGNhYjkyOGQyZGQ1NTZjODViZjk5YTY4ODFjOWRjNjkyYzZmODY2ZDQ4NjlkZjY3YSAgLQo=</ds:SignatureValue>
<KeyInfo xmlns="http://www.w3.org/2000/09/xmldsig#">
<ds:X509Data>
<ds:X509Certificate>NTIyMzk0ZGI4MjI0ZjI5ZGNhYjkyOGQyZGQ1NTZjODViZjk5YTY4ODFjOWRjNjkyYzZmODY2ZDQ4NjlkZjY3YSAgLQo=</ds:X509Certificate>
</ds:X509Data>
</KeyInfo>
</ds:Signature>
<Subject>
<NameID Format="urn:oasis:names:tc:SAML:2.0:nameid-format:persistent">{fed_identifier}</NameID>
<SubjectConfirmation Method="urn:oasis:names:tc:SAML:2.0:cm:bearer">
<SubjectConfirmationData NotOnOrAfter="2012-01-01T13:00:00.000Z" Recipient="https://signin.aws.amazon.com/saml"/>
</SubjectConfirmation>
</Subject>
<Conditions NotBefore="2012-01-01T12:00:00.000Z" NotOnOrAfter="2012-01-01T13:00:00.000Z">
<AudienceRestriction>
<Audience>urn:amazon:webservices</Audience>
</AudienceRestriction>
</Conditions>
<AttributeStatement>
<Attribute Name="https://aws.amazon.com/SAML/Attributes/RoleSessionName">
<AttributeValue>{fed_name}</AttributeValue>
</Attribute>
<Attribute Name="https://aws.amazon.com/SAML/Attributes/Role">
<AttributeValue>arn:aws:iam::{self.account_b}:role/{role_name},arn:aws:iam::{self.account_b}:saml-provider/{provider_name}</AttributeValue>
</Attribute>
<Attribute Name="https://aws.amazon.com/SAML/Attributes/SessionDuration">
<AttributeValue>900</AttributeValue>
</Attribute>
</AttributeStatement>
<AuthnStatement AuthnInstant="2012-01-01T12:00:00.000Z" SessionIndex="_00000000-0000-0000-0000-000000000000">
<AuthnContext>
<AuthnContextClassRef>urn:oasis:names:tc:SAML:2.0:ac:classes:PasswordProtectedTransport</AuthnContextClassRef>
</AuthnContext>
</AuthnStatement>
</Assertion>
</samlp:Response>""".replace("\n", "")
assume_role_response = self.sts.assume_role_with_saml(
RoleArn=role_input,
PrincipalArn=principal_role,
SAMLAssertion=b64encode(saml_assertion.encode("utf-8")).decode("utf-8"),
)
# Assume the new role
iam_account_b = boto3.client(
"iam",
aws_access_key_id=assume_role_response["Credentials"]["AccessKeyId"],
aws_secret_access_key=assume_role_response["Credentials"][
"SecretAccessKey"
],
aws_session_token=assume_role_response["Credentials"]["SessionToken"],
region_name="us-east-1",
)
# Verify new users belong to the different account
user = iam_account_b.create_user(UserName="user-in-new-account")["User"]
assert user["Arn"] == (
f"arn:aws:iam::{self.account_b}:user/user-in-new-account"
)
def test_dynamodb_supports_multiple_accounts(self):
ddb_client = boto3.client("dynamodb", region_name="us-east-1")
ddb_client.create_table(
TableName="table-in-default-account",
KeySchema=[{"AttributeName": "id", "KeyType": "HASH"}],
AttributeDefinitions=[{"AttributeName": "id", "AttributeType": "S"}],
ProvisionedThroughput={"ReadCapacityUnits": 1, "WriteCapacityUnits": 5},
)
# assume role to another aws account
role_name = f"arn:aws:iam::{self.account_b}:role/my-role"
response = self.sts.assume_role(
RoleArn=role_name,
RoleSessionName="test-session-name",
ExternalId="test-external-id",
)
# Assume the new role
ddb_account_b = boto3.client(
"dynamodb",
aws_access_key_id=response["Credentials"]["AccessKeyId"],
aws_secret_access_key=response["Credentials"]["SecretAccessKey"],
aws_session_token=response["Credentials"]["SessionToken"],
region_name="us-east-1",
)
# Verify new dynamodb belong to the different account
ddb_account_b.create_table(
TableName="table-in-new-account",
KeySchema=[{"AttributeName": "id", "KeyType": "HASH"}],
AttributeDefinitions=[{"AttributeName": "id", "AttributeType": "S"}],
ProvisionedThroughput={"ReadCapacityUnits": 1, "WriteCapacityUnits": 5},
)
table = ddb_client.describe_table(TableName="table-in-default-account")["Table"]
assert table["TableArn"] == (
"arn:aws:dynamodb:us-east-1:123456789012:table/table-in-default-account"
)
table = ddb_account_b.describe_table(TableName="table-in-new-account")["Table"]
assert table["TableArn"] == (
f"arn:aws:dynamodb:us-east-1:{self.account_b}:table/table-in-new-account"
)
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