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iam: test cross-account policy with assumed role
Signed-off-by: Casey Bodley <cbodley@redhat.com>
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Casey Bodley
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1 changed files with 282 additions and 0 deletions
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@ -2301,6 +2301,288 @@ def test_account_role_policy_allow(iam_root):
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# something other than AccessDenied
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retry_on('AccessDenied', 10, s3.list_buckets)
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# alt account user assumes main account role to access main account bucket
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@pytest.mark.iam_account
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@pytest.mark.iam_cross_account
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@pytest.mark.iam_role
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@pytest.mark.role_policy
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def test_same_account_role_policy_allow(iam_root, iam_alt_root):
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path = get_iam_path_prefix()
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user_name = make_iam_name('AltUser')
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role_name = make_iam_name('MyRole')
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session_name = 'MySession'
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bucket_name = get_new_bucket_name()
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user = iam_alt_root.create_user(UserName=user_name, Path=path)['User']
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user_arn = user['Arn']
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key = iam_alt_root.create_access_key(UserName=user_name)['AccessKey']
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s3_main = get_iam_root_client(service_name='s3')
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s3_main.create_bucket(Bucket=bucket_name)
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trust_policy = json.dumps({
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'Version': '2012-10-17',
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'Statement': [{
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'Effect': 'Allow',
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'Action': 'sts:AssumeRole',
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'Principal': {'AWS': user_arn}
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}]
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})
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# returns MalformedPolicyDocument until the user arn starts working
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role = retry_on('MalformedPolicyDocument', 10, iam_root.create_role,
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RoleName=role_name, Path=path, AssumeRolePolicyDocument=trust_policy)['Role']
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role_arn = role['Arn']
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sts = get_sts_client(aws_access_key_id=key['AccessKeyId'],
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aws_secret_access_key=key['SecretAccessKey'])
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# returns InvalidClientTokenId or AccessDenied until the access key starts working
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response = retry_on(('InvalidClientTokenId', 'AccessDenied'), 10, sts.assume_role,
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RoleArn=role_arn, RoleSessionName=session_name)
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creds = response['Credentials']
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s3 = get_iam_s3client(aws_access_key_id = creds['AccessKeyId'],
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aws_secret_access_key = creds['SecretAccessKey'],
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aws_session_token = creds['SessionToken'])
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# expect AccessDenied because no identity policy allows s3 actions
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e = assert_raises(ClientError, s3.list_objects, Bucket=bucket_name)
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status, error_code = _get_status_and_error_code(e.response)
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assert status == 403
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assert error_code == 'AccessDenied'
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policy_name = 'AllowListBucket'
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policy = json.dumps({
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'Version': '2012-10-17',
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'Statement': [{
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'Effect': 'Allow',
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'Action': 's3:ListBucket',
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'Resource': '*'
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}]
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})
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iam_root.put_role_policy(RoleName=role_name, PolicyName=policy_name, PolicyDocument=policy)
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# the policy may take a bit to start working. retry until it returns
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# something other than AccessDenied
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retry_on('AccessDenied', 10, s3.list_objects, Bucket=bucket_name)
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# alt account user assumes main account role to access alt account bucket
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@pytest.mark.iam_account
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@pytest.mark.iam_cross_account
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@pytest.mark.iam_role
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@pytest.mark.role_policy
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def test_cross_account_role_policy_allow(iam_root, iam_alt_root):
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path = get_iam_path_prefix()
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user_name = make_iam_name('AltUser')
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role_name = make_iam_name('MyRole')
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session_name = 'MySession'
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bucket_name = get_new_bucket_name()
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user = iam_alt_root.create_user(UserName=user_name, Path=path)['User']
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user_arn = user['Arn']
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key = iam_alt_root.create_access_key(UserName=user_name)['AccessKey']
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s3_alt = get_iam_alt_root_client(service_name='s3')
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s3_alt.create_bucket(Bucket=bucket_name)
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trust_policy = json.dumps({
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'Version': '2012-10-17',
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'Statement': [{
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'Effect': 'Allow',
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'Action': 'sts:AssumeRole',
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'Principal': {'AWS': user_arn}
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}]
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})
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# returns MalformedPolicyDocument until the user arn starts working
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role = retry_on('MalformedPolicyDocument', 10, iam_root.create_role,
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RoleName=role_name, Path=path, AssumeRolePolicyDocument=trust_policy)['Role']
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role_arn = role['Arn']
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sts = get_sts_client(aws_access_key_id=key['AccessKeyId'],
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aws_secret_access_key=key['SecretAccessKey'])
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# returns InvalidClientTokenId or AccessDenied until the access key starts working
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response = retry_on(('InvalidClientTokenId', 'AccessDenied'), 10, sts.assume_role,
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RoleArn=role_arn, RoleSessionName=session_name)
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creds = response['Credentials']
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s3 = get_iam_s3client(aws_access_key_id = creds['AccessKeyId'],
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aws_secret_access_key = creds['SecretAccessKey'],
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aws_session_token = creds['SessionToken'])
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# expect AccessDenied because no identity policy allows s3 actions
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e = assert_raises(ClientError, s3.list_objects, Bucket=bucket_name)
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status, error_code = _get_status_and_error_code(e.response)
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assert status == 403
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assert error_code == 'AccessDenied'
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policy_name = 'AllowListBucket'
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policy = json.dumps({
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'Version': '2012-10-17',
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'Statement': [{
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'Effect': 'Allow',
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'Action': 's3:ListBucket',
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'Resource': '*'
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}]
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})
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iam_root.put_role_policy(RoleName=role_name, PolicyName=policy_name, PolicyDocument=policy)
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# expect AccessDenied because no resource policy allows the main account
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e = assert_raises(ClientError, s3.list_objects, Bucket=bucket_name)
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status, error_code = _get_status_and_error_code(e.response)
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assert status == 403
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assert error_code == 'AccessDenied'
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# add a bucket policy that allows s3:ListBucket for the main account's arn
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main_arn = iam_root.get_user()['User']['Arn']
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s3_alt.put_bucket_policy(Bucket=bucket_name, Policy=json.dumps({
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'Version': '2012-10-17',
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'Statement': [{
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'Effect': 'Allow',
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'Principal': {'AWS': main_arn},
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'Action': 's3:ListBucket',
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'Resource': f'arn:aws:s3:::{bucket_name}'
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}]
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}))
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# the policy may take a bit to start working. retry until it returns
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# something other than AccessDenied
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retry_on('AccessDenied', 10, s3.list_objects, Bucket=bucket_name)
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# alt account user assumes main account role to create a bucket
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@pytest.mark.iam_account
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@pytest.mark.iam_cross_account
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@pytest.mark.iam_role
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@pytest.mark.role_policy
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def test_account_role_policy_allow_create_bucket(iam_root, iam_alt_root):
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path = get_iam_path_prefix()
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user_name = make_iam_name('AltUser')
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role_name = make_iam_name('MyRole')
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session_name = 'MySession'
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bucket_name = get_new_bucket_name()
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user = iam_alt_root.create_user(UserName=user_name, Path=path)['User']
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user_arn = user['Arn']
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key = iam_alt_root.create_access_key(UserName=user_name)['AccessKey']
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trust_policy = json.dumps({
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'Version': '2012-10-17',
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'Statement': [{
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'Effect': 'Allow',
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'Action': 'sts:AssumeRole',
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'Principal': {'AWS': user_arn}
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}]
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})
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# returns MalformedPolicyDocument until the user arn starts working
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role = retry_on('MalformedPolicyDocument', 10, iam_root.create_role,
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RoleName=role_name, Path=path, AssumeRolePolicyDocument=trust_policy)['Role']
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role_arn = role['Arn']
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sts = get_sts_client(aws_access_key_id=key['AccessKeyId'],
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aws_secret_access_key=key['SecretAccessKey'])
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# returns InvalidClientTokenId or AccessDenied until the access key starts working
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response = retry_on(('InvalidClientTokenId', 'AccessDenied'), 10, sts.assume_role,
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RoleArn=role_arn, RoleSessionName=session_name)
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creds = response['Credentials']
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s3 = get_iam_s3client(aws_access_key_id = creds['AccessKeyId'],
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aws_secret_access_key = creds['SecretAccessKey'],
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aws_session_token = creds['SessionToken'])
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# expect AccessDenied because no identity policy allows s3 actions
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e = assert_raises(ClientError, s3.create_bucket, Bucket=bucket_name, ObjectOwnership='ObjectWriter', ACL='private')
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status, error_code = _get_status_and_error_code(e.response)
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assert status == 403
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assert error_code == 'AccessDenied'
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policy_name = 'AllowCreateBucket'
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policy = json.dumps({
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'Version': '2012-10-17',
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'Statement': [{
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'Effect': 'Allow',
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'Action': ['s3:CreateBucket', 's3:PutBucketAcl'],
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'Resource': '*'
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}]
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})
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iam_root.put_role_policy(RoleName=role_name, PolicyName=policy_name, PolicyDocument=policy)
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# the policy may take a bit to start working. retry until it returns
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# something other than AccessDenied
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retry_on('AccessDenied', 10, s3.create_bucket, Bucket=bucket_name, ObjectOwnership='ObjectWriter', ACL='private')
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# verify that the bucket is owned by the role's account
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s3_main = get_iam_root_client(service_name='s3')
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response = s3_main.get_bucket_acl(Bucket=bucket_name)
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main_arn = iam_root.get_user()['User']['Arn']
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account_id = main_arn.removeprefix('arn:aws:iam::').removesuffix(':root')
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assert response['Owner']['ID'] == account_id
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assert response['Grants'][0]['Grantee']['ID'] == account_id
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# alt account user assumes main account role to read the role info
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@pytest.mark.iam_account
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@pytest.mark.iam_cross_account
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@pytest.mark.iam_role
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@pytest.mark.role_policy
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def test_account_role_policy_allow_get_role(iam_root, iam_alt_root):
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path = get_iam_path_prefix()
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user_name = make_iam_name('AltUser')
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role_name = make_iam_name('MyRole')
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session_name = 'MySession'
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bucket_name = get_new_bucket_name()
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user = iam_alt_root.create_user(UserName=user_name, Path=path)['User']
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user_arn = user['Arn']
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key = iam_alt_root.create_access_key(UserName=user_name)['AccessKey']
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trust_policy = json.dumps({
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'Version': '2012-10-17',
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'Statement': [{
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'Effect': 'Allow',
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'Action': 'sts:AssumeRole',
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'Principal': {'AWS': user_arn}
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}]
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})
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# returns MalformedPolicyDocument until the user arn starts working
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role = retry_on('MalformedPolicyDocument', 10, iam_root.create_role,
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RoleName=role_name, Path=path, AssumeRolePolicyDocument=trust_policy)['Role']
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role_arn = role['Arn']
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sts = get_sts_client(aws_access_key_id=key['AccessKeyId'],
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aws_secret_access_key=key['SecretAccessKey'])
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# returns InvalidClientTokenId or AccessDenied until the access key starts working
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response = retry_on(('InvalidClientTokenId', 'AccessDenied'), 10, sts.assume_role,
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RoleArn=role_arn, RoleSessionName=session_name)
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creds = response['Credentials']
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iam = get_iam_root_client(service_name='iam',
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aws_access_key_id = creds['AccessKeyId'],
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aws_secret_access_key = creds['SecretAccessKey'],
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aws_session_token = creds['SessionToken'])
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# expect AccessDenied because no identity policy allows iam actions
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e = assert_raises(ClientError, iam.get_role, RoleName=role_name)
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status, error_code = _get_status_and_error_code(e.response)
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assert status == 403
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assert error_code == 'AccessDenied'
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policy_name = 'AllowGetRole'
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policy = json.dumps({
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'Version': '2012-10-17',
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'Statement': [{
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'Effect': 'Allow',
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'Action': 'iam:GetRole',
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'Resource': '*'
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}]
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})
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iam_root.put_role_policy(RoleName=role_name, PolicyName=policy_name, PolicyDocument=policy)
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# the policy may take a bit to start working. retry until it returns
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# something other than AccessDenied
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retry_on('AccessDenied', 10, iam.get_role, RoleName=role_name)
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# IAM OpenIDConnectProvider apis
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@pytest.mark.iam_account
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