def test_waf_rule_id(self):
"""Does waf:rule-id,global-OfficeCidr resolve to WAF ID"""
test_string = "waf:rule-id,global-OfficeCidr"
resolver = EFAwsResolver(TestEFAwsResolver.clients)
self.assertRegexpMatches(
resolver.lookup(test_string),
"^[a-f0-9]{8}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{12}$")
def test_waf_web_acl_id(self):
"""Does waf:web-acl-id,staging-StaticAcl resolve to Web ACL ID"""
test_string = "waf:web-acl-id,staging-StaticAcl"
resolver = EFAwsResolver(TestEFAwsResolver.clients)
self.assertRegexpMatches(
resolver.lookup(test_string),
"^[a-f0-9]{8}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{12}$")
def test_ec2_vpc_cidrblock(self):
"""Does ec2:vpc/cidrblock,vpc-staging resolve to a CIDR block"""
test_string = "ec2:vpc/cidrblock,vpc-staging"
resolver = EFAwsResolver(TestEFAwsResolver.clients)
self.assertRegexpMatches(
resolver.lookup(test_string),
"^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}\/\d{2}$")
def test_ec2_elasticip_elasticip_ipaddress(self):
"""Does ec2:elasticip/elasticip-ipaddress,ElasticIpMgmtCingest1 resolve to elastic IP address"""
test_string = "ec2:elasticip/elasticip-ipaddress,ElasticIpMgmtCingest1"
resolver = EFAwsResolver(TestEFAwsResolver.clients)
self.assertRegexpMatches(
resolver.lookup(test_string),
"^[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}$")
def test_ec2_vpc_subnets(self):
"""Does ec2:vpc/subnets,vpc-staging resolve to correctly-delimited string of AZ(s)"""
test_string = "ec2:vpc/subnets,vpc-staging"
resolver = EFAwsResolver(TestEFAwsResolver.clients)
self.assertRegexpMatches(
resolver.lookup(test_string),
"^subnet-[a-f0-9]{8}(\", \"subnet-[a-f0-9]{8}){0,1}$")
def test_ec2_vpc_availabilityzones(self):
"""Does ec2:vpc/availabilityzones,vpc-staging resolve to correctly-delimited string of AZ(s)"""
test_string = "ec2:vpc/availabilityzones,vpc-staging"
resolver = EFAwsResolver(TestEFAwsResolver.clients)
self.assertRegexpMatches(
resolver.lookup(test_string),
"^us-west-2(a|b)(\", \"us-west-2(a|b)){0,1}$")
def test_route53_public_hosted_zone_id_none(self):
"""Does route53:public-hosted-zone-id,cant_possibly_match return None"""
test_string = "route53:public-hosted-zone-id,cant_possibly_match"
resolver = EFAwsResolver(TestEFAwsResolver.clients)
self.assertIsNone(resolver.lookup(test_string))
def test_route53_public_hosted_zone_id(self):
"""Does route53:hosted-zone-id,cx-proto0.com. resolve to zone ID"""
test_string = "route53:public-hosted-zone-id,cx-proto0.com."
resolver = EFAwsResolver(TestEFAwsResolver.clients)
self.assertRegexpMatches(resolver.lookup(test_string),
"^[A-Z0-9]{13,14}$")
def test_ec2_route_table_main_route_table_id_none(self):
"""Does ec2:route-table/main-route-table-id,cant_possibly_match return None"""
test_string = "ec2:route-table/main-route-table-id,cant_possibly_match"
resolver = EFAwsResolver(TestEFAwsResolver.clients)
self.assertIsNone(resolver.lookup(test_string))
def test_ec2_security_group_security_group_id(self):
"""Does ec2:security-group/security-group-id,staging-core-ec2 resolve to a security group id"""
test_string = "ec2:security-group/security-group-id,staging-core-ec2"
resolver = EFAwsResolver(TestEFAwsResolver.clients)
self.assertRegexpMatches(resolver.lookup(test_string),
"^sg-[a-f0-9]{8}$")
def test_cloudfront_origin_access_identity_oai_canonical_user_id(self):
"""Does cloudfront:origin-access-identity/oai-canonical-user-id,static.cx-proto0.com resolve to oai ID"""
test_string = "cloudfront:origin-access-identity/oai-canonical-user-id,static.cx-proto0.com"
resolver = EFAwsResolver(TestEFAwsResolver.clients)
self.assertRegexpMatches(resolver.lookup(test_string),
"^[a-z0-9]{96}$")
def test_cloudfront_domain_name_none(self):
"""Does cloudfront:domain-name,cant_possibly_match return None"""
test_string = "cloudfront:domain-name,cant_possibly_match"
resolver = EFAwsResolver(TestEFAwsResolver.clients)
self.assertIsNone(resolver.lookup(test_string))
def test_ec2_vpc_subnets_default(self):
"""Does ec2:vpc/subnets,cant_possibly_match,DEFAULT return default value"""
test_string = "ec2:vpc/subnets,cant_possibly_match,DEFAULT"
resolver = EFAwsResolver(TestEFAwsResolver.clients)
self.assertRegexpMatches(resolver.lookup(test_string), "^DEFAULT$")
def test_ec2_vpc_subnets_none(self):
"""Does ec2:vpc/subnets,cant_possibly_match return None"""
test_string = "ec2:vpc/subnets,cant_possibly_match"
resolver = EFAwsResolver(TestEFAwsResolver.clients)
self.assertIsNone(resolver.lookup(test_string))
def test_ec2_subnet_subnet_id(self):
"""Does ec2:subnet/subnet-id,subnet-staging-a resolve to a subnet ID"""
test_string = "ec2:subnet/subnet-id,subnet-staging-a"
resolver = EFAwsResolver(TestEFAwsResolver.clients)
self.assertRegexpMatches(resolver.lookup(test_string),
"^subnet-[a-f0-9]{8}$")
def test_ec2_security_group_security_group_id_none(self):
"""Does ec2:security-group/security-group-id,cant_possibly_match return None"""
test_string = "ec2:security-group/security-group-id,cant_possibly_match"
resolver = EFAwsResolver(TestEFAwsResolver.clients)
self.assertIsNone(resolver.lookup(test_string))
def test_route53_public_hosted_zone_id_default(self):
"""Does route53:public-hosted-zone-id,cant_possibly_match,DEFAULT return default value"""
test_string = "route53:public-hosted-zone-id,cant_possibly_match,DEFAULT"
resolver = EFAwsResolver(TestEFAwsResolver.clients)
self.assertRegexpMatches(resolver.lookup(test_string), "^DEFAULT$")
def test_ec2_vpc_vpc_id(self):
"""Does ec2:vpc/vpc-id,vpc-staging resolve to VPC ID"""
test_string = "ec2:vpc/vpc-id,vpc-staging"
resolver = EFAwsResolver(TestEFAwsResolver.clients)
self.assertRegexpMatches(resolver.lookup(test_string),
"^vpc-[a-f0-9]{8}$")
def test_cloudfront_domain_name(self):
"""Does cloudfront:domain-name,static.cx-proto0.com resolve to a Cloudfront FQDN"""
test_string = "cloudfront:domain-name,static.cx-proto0.com"
resolver = EFAwsResolver(TestEFAwsResolver.clients)
self.assertRegexpMatches(resolver.lookup(test_string),
"^[a-z0-9]{13,14}.cloudfront.net$")
def test_cloudfront_origin_access_identity_oai_canonical_user_id_default(
self):
"""Does cloudfront:origin-access-identity/oai-canonical-user-id,cant_possibly_match,DEFAULT return default value"""
test_string = "cloudfront:origin-access-identity/oai-canonical-user-id,cant_possibly_match,DEFAULT"
resolver = EFAwsResolver(TestEFAwsResolver.clients)
self.assertRegexpMatches(resolver.lookup(test_string), "^DEFAULT$")
def test_cloudfront_domain_name_default(self):
"""Does cloudfront:domain-name,cant_possibly_match,DEFAULT return default value"""
test_string = "cloudfront:domain-name,cant_possibly_match,DEFAULT"
resolver = EFAwsResolver(TestEFAwsResolver.clients)
self.assertRegexpMatches(resolver.lookup(test_string), "^DEFAULT$")
def test_ec2_elasticip_elasticip_id_none(self):
"""Does ec2:elasticip/elasticip-id,cant_possibly_match return None"""
test_string = "ec2:elasticip/elasticip-id,cant_possibly_match"
resolver = EFAwsResolver(TestEFAwsResolver.clients)
self.assertIsNone(resolver.lookup(test_string))
def test_cloudfront_origin_access_identity_oai_canonical_user_id_none(
self):
"""Does cloudfront:origin-access-identity/oai-canonical-user-id,cant_possibly_match return None"""
test_string = "cloudfront:origin-access-identity/oai-canonical-user-id,cant_possibly_match"
resolver = EFAwsResolver(TestEFAwsResolver.clients)
self.assertIsNone(resolver.lookup(test_string))
def test_ec2_route_table_main_route_table_id_default(self):
"""Does ec2:route-table/main-route-table-id,cant_possibly_match,DEFAULT return default value"""
test_string = "ec2:route-table/main-route-table-id,cant_possibly_match,DEFAULT"
resolver = EFAwsResolver(TestEFAwsResolver.clients)
self.assertRegexpMatches(resolver.lookup(test_string), "^DEFAULT$")
def test_ec2_elasticip_elasticip_id(self):
"""Does ec2:elasticip/elasticip-id,ElasticIpMgmtCingest1 resolve to elastic IP allocation ID"""
test_string = "ec2:elasticip/elasticip-id,ElasticIpMgmtCingest1"
resolver = EFAwsResolver(TestEFAwsResolver.clients)
self.assertRegexpMatches(resolver.lookup(test_string),
"^eipalloc-[a-f0-9]{8}$")
def test_waf_web_acl_id_none(self):
"""Does waf:web-acl-id,cant_possibly_match return None"""
test_string = "waf:web-acl-id,cant_possibly_match"
resolver = EFAwsResolver(TestEFAwsResolver.clients)
self.assertIsNone(resolver.lookup(test_string))
def test_ec2_elasticip_elasticip_id_default(self):
"""Does ec2:elasticip/elasticip-id,cant_possibly_match,DEFAULT return default value"""
test_string = "ec2:elasticip/elasticip-id,cant_possibly_match,DEFAULT"
resolver = EFAwsResolver(TestEFAwsResolver.clients)
self.assertRegexpMatches(resolver.lookup(test_string), "^DEFAULT$")
def test_waf_web_acl_id_default(self):
"""Does waf:web-acl-id,cant_possibly_match,DEFAULT return default value"""
test_string = "waf:web-acl-id,cant_possibly_match,DEFAULT"
resolver = EFAwsResolver(TestEFAwsResolver.clients)
self.assertRegexpMatches(resolver.lookup(test_string), "^DEFAULT$")
def __init__(self,
profile=None, region=None, # set both for user access mode
lambda_context=None, # set if target is 'self' and this is a lambda
target_other=False, env=None, service=None, # set env & service if target_other=True
verbose=False
):
"""
Depending on how this is called, access mode (how it logs into AWS) and target (what the
various context vars report) will vary
ACCESS MODE - how this logs in to AWS
user: "******"
both 'profile' and 'region' are required
is always "operating on something else" (TARGET is never "self")
role: "running in AWS EC2 or Lambda with a role credential"
do not set profile
TARGET - what context is reported
self: "this ec2 instance or lambda is initializing itself"
assumed for ec2 and lambda, unless target_other=True in the constructor
never an option for "user" access mode
other: "this local user, ec2 instance, or lambda is configuring something else"
always "other" if access mode is "user"
if access mode is "role", set target_other=True in the constructor
Constructor must also set 'env' and 'service'
self:
lambda_context must be provided if this is a lambda; leave it unset for ec2
INSTANCE_ID = instance ID if EC2, else None
FUNCTION_NAME = function name if lambda, else None
ACCOUNT = numeric account this is running in
ACCOUNT_ALIAS = named alias of the account this is running in
ROLE = role this is running as
ENV = the environment this is running in, from role name
ENV_SHORT = derived from ENV
ENV_FULL = fully qualified environment, same as ENV unless env is a global env (mgmt.* or global.*)
SERVICE = the service this is, from role name
REGION = region this is running in
something else:
INSTANCE_ID = None
FUNCTION_NAME = None
ACCOUNT = the numeric account I'm logged into (look up)
ACCOUNT_ALIAS = the alias of the account i'm logged into (look up)
ROLE = None
ENV = the target's environment, passed in from the constructor
ENV_SHORT = derived from ENV
ENV_FULL = ENV, with ".<ACCOUNT_ALIAS>" as appropriate
SERVICE = the service name, passed in from the constructor
REGION = the region I am in (ec2, lambda) or explicitly set (region= in constructor)
Collects instance's environment for use in templates:
{{ACCOUNT}} - AWS account number
CloudFormation can use this or the AWS::AccountID pseudo param
{{ACCOUNT_ALIAS}} - AWS account alias
{{ENV}} - environment: mgmt, prod, staging, proto<N>, etc.
{{ENV_SHORT}} - env with <N> or account trimmed: mgmt, prod, staging, proto, etc.
{{ENV_FULL}} - env fully qualified: prod, staging, proto<N>, mgmt.<account_alias>, etc.
{{FUNCTION_NAME}} - only for lambdas
{{INSTANCE_ID}} - only for ec2
{{REGION}} - the region currently being worked in
CloudFormation can use this or the AWS::Region pseudo param
{{ROLE}} - the role bound to the ec2 instance or lambda; only for ec2 and lambda
CloudFormation: compose role name in template by joining other strings
"""
# instance vars
self.verbose = False # print noisy status if True
# resolved tokens - only look up symbols once per session. Protect internal names by declaring
self.resolved = {
"ACCOUNT": None,
"ACCOUNT_ALIAS": None,
"ENV": None,
"ENV_SHORT": None,
"ENV_FULL": None,
"FUNCTION_NAME": None,
"INSTANCE_ID": None,
"REGION": None,
"ROLE": None
}
# template and parameters are populated by the load() method as each template is processed
self.template = None
# parameters that accompany this template, if any
self.parameters = {}
# Sets of symbols found in the current template (only)
# read back with self.symbols() and self.unresolved_symbols()
self.symbols = set()
# capture verbosity pref from constructor
self.verbose = verbose
# determine ACCESS MODE
if profile: # accessing as a user
target_other = True
if not region:
fail("'region' is required with 'profile' for user-mode access")
where = whereami()
# require env and service params init() when target is 'other'
if (target_other or where == "virtualbox-kvm") and (env is None or service is None):
fail("'env' and 'service' must be set when target is 'other' or running in " + where)
if target_other or profile:
self.resolved["REGION"] = region
# lambda initializing self
elif lambda_context:
self.resolved["REGION"] = lambda_context.invoked_function_arn.split(":")[3]
# ec2 initializing self
else:
self.resolved["REGION"] = get_metadata_or_fail("placement/availability-zone/")[:-1]
# Create clients - if accessing by role, profile should be None
clients = [
"cloudformation",
"cloudfront",
"cognito-identity",
"cognito-idp",
"ec2",
"elbv2",
"iam",
"kms",
"lambda",
"route53",
"s3",
"sts",
"waf"
]
try:
EFTemplateResolver.__CLIENTS = create_aws_clients(self.resolved["REGION"], profile, *clients)
except RuntimeError as error:
fail("Exception logging in with Session()", error)
# Create EFAwsResolver object for interactive lookups
EFTemplateResolver.__AWSR = EFAwsResolver(EFTemplateResolver.__CLIENTS)
# Create EFConfigResolver object for ef tooling config lookups
EFTemplateResolver.__EFCR = EFConfigResolver()
# Create EFVersionResolver object for version lookups
EFTemplateResolver.__VR = EFVersionResolver(EFTemplateResolver.__CLIENTS)
# Set the internal parameter values for aws
# self-configuring lambda
if (not target_other) and lambda_context:
arn_split = lambda_context.invoked_function_arn.split(":")
self.resolved["ACCOUNT"] = arn_split[4]
self.resolved["FUNCTION_NAME"] = arn_split[6]
try:
lambda_desc = EFTemplateResolver.__CLIENTS["lambda"].get_function()
except:
fail("Exception in get_function: ", sys.exc_info())
self.resolved["ROLE"] = lambda_desc["Configuration"]["Role"]
env = re.search("^({})-".format(EFConfig.VALID_ENV_REGEX), self.resolved["ROLE"])
if not env:
fail("Did not find environment in lambda function name.")
self.resolved["ENV"] = env.group(1)
parsed_service = re.search(self.resolved["ENV"] + "-(.*?)-lambda", self.resolved["ROLE"])
if parsed_service:
self.resolved["SERVICE"] = parsed_service.group(1)
# self-configuring EC2
elif (not target_other) and (not lambda_context):
self.resolved["INSTANCE_ID"] = get_metadata_or_fail('instance-id')
try:
instance_desc = EFTemplateResolver.__CLIENTS["ec2"].describe_instances(InstanceIds=[self.resolved["INSTANCE_ID"]])
except:
fail("Exception in describe_instances: ", sys.exc_info())
self.resolved["ACCOUNT"] = instance_desc["Reservations"][0]["OwnerId"]
arn = instance_desc["Reservations"][0]["Instances"][0]["IamInstanceProfile"]["Arn"]
self.resolved["ROLE"] = arn.split(":")[5].split("/")[1]
env = re.search("^({})-".format(EFConfig.VALID_ENV_REGEX), self.resolved["ROLE"])
if not env:
fail("Did not find environment in role name")
self.resolved["ENV"] = env.group(1)
self.resolved["SERVICE"] = "-".join(self.resolved["ROLE"].split("-")[1:])
# target is "other"
else:
try:
if whereami() == "ec2":
self.resolved["ACCOUNT"] = str(json.loads(http_get_metadata('iam/info'))["InstanceProfileArn"].split(":")[4])
else:
self.resolved["ACCOUNT"] = get_account_id(EFTemplateResolver.__CLIENTS["sts"])
except botocore.exceptions.ClientError as error:
fail("Exception in get_user()", error)
self.resolved["ENV"] = env
self.resolved["SERVICE"] = service
# ACCOUNT_ALIAS is resolved consistently for access modes and targets other than virtualbox
try:
self.resolved["ACCOUNT_ALIAS"] = EFTemplateResolver.__CLIENTS["iam"].list_account_aliases()["AccountAliases"][0]
except botocore.exceptions.ClientError as error:
fail("Exception in list_account_aliases", error)
# ENV_SHORT is resolved the same way for all access modes and targets
self.resolved["ENV_SHORT"] = self.resolved["ENV"].strip(".0123456789")
# ENV_FULL is resolved the same way for all access modes and targets, depending on previously-resolved values
if self.resolved["ENV"] in EFConfig.ACCOUNT_SCOPED_ENVS:
self.resolved["ENV_FULL"] = "{}.{}".format(self.resolved["ENV"], self.resolved["ACCOUNT_ALIAS"])
else:
self.resolved["ENV_FULL"] = self.resolved["ENV"]
if self.verbose:
print(repr(self.resolved), file=sys.stderr)
def test_ec2_route_table_main_route_table_id(self):
"""Does ec2:route-table/main-route-table-id,vpc-<env> resolve to route table ID"""
test_string = "ec2:route-table/main-route-table-id,vpc-" + context.env
resolver = EFAwsResolver(TestEFAwsResolver.clients)
self.assertRegexpMatches(resolver.lookup(test_string),
"^rtb-[a-f0-9]{8}$")
