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# Copyright (c) 2006,2007 Mitch Garnaat http://garnaat.org/
#
# Permission is hereby granted, free of charge, to any person obtaining a
# copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish, dis-
# tribute, sublicense, and/or sell copies of the Software, and to permit
# persons to whom the Software is furnished to do so, subject to the fol-
# lowing conditions:
#
# The above copyright notice and this permission notice shall be included
# in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
# OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABIL-
# ITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
# SHALL THE AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
# WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
# IN THE SOFTWARE.
"""
Represents an EC2 Security Group
"""
from boto.ec2.ec2object import EC2Object
from boto.exception import BotoClientError
class SecurityGroup(EC2Object):
def __init__(self, connection=None, owner_id=None,
name=None, description=None):
EC2Object.__init__(self, connection)
self.owner_id = owner_id
self.name = name
self.description = description
self.rules = []
def __repr__(self):
return 'SecurityGroup:%s' % self.name
def startElement(self, name, attrs, connection):
if name == 'item':
self.rules.append(IPPermissions(self))
return self.rules[-1]
else:
return None
def endElement(self, name, value, connection):
if name == 'ownerId':
self.owner_id = value
elif name == 'groupName':
self.name = value
elif name == 'groupDescription':
self.description = value
elif name == 'ipRanges':
pass
elif name == 'return':
if value == 'false':
self.status = False
elif value == 'true':
self.status = True
else:
raise Exception(
'Unexpected value of status %s for group %s'%(
value,
self.name
)
)
else:
setattr(self, name, value)
def delete(self):
return self.connection.delete_security_group(self.name)
def add_rule(self, ip_protocol, from_port, to_port,
src_group_name, src_group_owner_id, cidr_ip):
rule = IPPermissions(self)
rule.ip_protocol = ip_protocol
rule.from_port = from_port
rule.to_port = to_port
self.rules.append(rule)
rule.add_grant(src_group_name, src_group_owner_id, cidr_ip)
def remove_rule(self, ip_protocol, from_port, to_port,
src_group_name, src_group_owner_id, cidr_ip):
target_rule = None
for rule in self.rules:
if rule.ip_protocol == ip_protocol:
if rule.from_port == from_port:
if rule.to_port == to_port:
target_rule = rule
target_grant = None
for grant in rule.grants:
if grant.name == src_group_name:
if grant.owner_id == src_group_owner_id:
if grant.cidr_ip == cidr_ip:
target_grant = grant
if target_grant:
rule.grants.remove(target_grant)
if len(rule.grants) == 0:
self.rules.remove(target_rule)
def authorize(self, ip_protocol=None, from_port=None, to_port=None,
cidr_ip=None, src_group=None):
"""
Add a new rule to this security group.
You need to pass in either src_group_name
OR ip_protocol, from_port, to_port,
and cidr_ip. In other words, either you are authorizing another
group or you are authorizing some ip-based rule.
:type ip_protocol: string
:param ip_protocol: Either tcp | udp | icmp
:type from_port: int
:param from_port: The beginning port number you are enabling
:type to_port: int
:param to_port: The ending port number you are enabling
:type to_port: string
:param to_port: The CIDR block you are providing access to.
See http://en.wikipedia.org/wiki/Classless_Inter-Domain_Routing
:type src_group: :class:`boto.ec2.securitygroup.SecurityGroup` or
:class:`boto.ec2.securitygroup.GroupOrCIDR`
:rtype: bool
:return: True if successful.
"""
if src_group:
from_port = None
to_port = None
cidr_ip = None
ip_protocol = None
src_group_name = src_group.name
src_group_owner_id = src_group.owner_id
else:
src_group_name = None
src_group_owner_id = None
status = self.connection.authorize_security_group(self.name,
src_group_name,
src_group_owner_id,
ip_protocol,
from_port,
to_port,
cidr_ip)
if status:
self.add_rule(ip_protocol, from_port, to_port, src_group_name,
src_group_owner_id, cidr_ip)
return status
def revoke(self, ip_protocol=None, from_port=None, to_port=None,
cidr_ip=None, src_group=None):
if src_group:
from_port=None
to_port=None
cidr_ip=None
ip_protocol = None
src_group_name = src_group.name
src_group_owner_id = src_group.owner_id
else:
src_group_name = None
src_group_owner_id = None
status = self.connection.revoke_security_group(self.name,
src_group_name,
src_group_owner_id,
ip_protocol,
from_port,
to_port,
cidr_ip)
if status:
self.remove_rule(ip_protocol, from_port, to_port, src_group_name,
src_group_owner_id, cidr_ip)
return status
def copy_to_region(self, region, name=None):
"""
Create a copy of this security group in another region.
Note that the new security group will be a separate entity
and will not stay in sync automatically after the copy
operation.
:type region: :class:`boto.ec2.regioninfo.RegionInfo`
:param region: The region to which this security group will be copied.
:type name: string
:param name: The name of the copy. If not supplied, the copy
will have the same name as this security group.
:rtype: :class:`boto.ec2.securitygroup.SecurityGroup`
:return: The new security group.
"""
if region.name == self.region:
raise BotoClientError('Unable to copy to the same Region')
conn_params = self.connection.get_params()
rconn = region.connect(**conn_params)
sg = rconn.create_security_group(name or self.name, self.description)
source_groups = []
for rule in self.rules:
grant = rule.grants[0]
if grant.name:
if grant.name not in source_groups:
source_groups.append(grant.name)
sg.authorize(None, None, None, None, grant)
else:
sg.authorize(rule.ip_protocol, rule.from_port, rule.to_port,
grant.cidr_ip)
return sg
def instances(self):
instances = []
rs = self.connection.get_all_instances()
for reservation in rs:
uses_group = [g.id for g in reservation.groups if g.id == self.name]
if uses_group:
instances.extend(reservation.instances)
return instances
class IPPermissions:
def __init__(self, parent=None):
self.parent = parent
self.ip_protocol = None
self.from_port = None
self.to_port = None
self.grants = []
def __repr__(self):
return 'IPPermissions:%s(%s-%s)' % (self.ip_protocol,
self.from_port, self.to_port)
def startElement(self, name, attrs, connection):
if name == 'item':
self.grants.append(GroupOrCIDR(self))
return self.grants[-1]
return None
def endElement(self, name, value, connection):
if name == 'ipProtocol':
self.ip_protocol = value
elif name == 'fromPort':
self.from_port = value
elif name == 'toPort':
self.to_port = value
else:
setattr(self, name, value)
def add_grant(self, name=None, owner_id=None, cidr_ip=None):
grant = GroupOrCIDR(self)
grant.owner_id = owner_id
grant.name = name
grant.cidr_ip = cidr_ip
self.grants.append(grant)
return grant
class GroupOrCIDR:
def __init__(self, parent=None):
self.owner_id = None
self.name = None
self.cidr_ip = None
def __repr__(self):
if self.cidr_ip:
return '%s' % self.cidr_ip
else:
return '%s-%s' % (self.name, self.owner_id)
def startElement(self, name, attrs, connection):
return None
def endElement(self, name, value, connection):
if name == 'userId':
self.owner_id = value
elif name == 'groupName':
self.name = value
if name == 'cidrIp':
self.cidr_ip = value
else:
setattr(self, name, value)
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