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secgroupsimplify.py
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# Copyright 2013 Amazon.com, Inc. or its affiliates. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"). You
# may not use this file except in compliance with the License. A copy of
# the License is located at
#
# http://aws.amazon.com/apache2.0/
#
# or in the "license" file accompanying this file. This file is
# distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF
# ANY KIND, either express or implied. See the License for the specific
# language governing permissions and limitations under the License.
"""
This customization adds the following scalar parameters to the
authorize operations:
* --protocol: tcp | udp | icmp or any protocol number
* --port: A single integer or a range (min-max). You can specify ``all``
to mean all ports (for example, port range 0-65535)
* --source-group: Either the source security group ID or name.
* --cidr - The IPv4 address range, in CIDR format. Cannot be used when specifying a source or
destination security group.
"""
from awscli.arguments import CustomArgument
def _add_params(argument_table, **kwargs):
arg = ProtocolArgument('protocol',
help_text=PROTOCOL_DOCS)
argument_table['protocol'] = arg
argument_table['ip-protocol']._UNDOCUMENTED = True
arg = PortArgument('port', help_text=PORT_DOCS)
argument_table['port'] = arg
# Port handles both the from-port and to-port,
# we need to not document both args.
argument_table['from-port']._UNDOCUMENTED = True
argument_table['to-port']._UNDOCUMENTED = True
arg = CidrArgument('cidr', help_text=CIDR_DOCS)
argument_table['cidr'] = arg
argument_table['cidr-ip']._UNDOCUMENTED = True
arg = SourceGroupArgument('source-group',
help_text=SOURCEGROUP_DOCS)
argument_table['source-group'] = arg
argument_table['source-security-group-name']._UNDOCUMENTED = True
arg = GroupOwnerArgument('group-owner',
help_text=GROUPOWNER_DOCS)
argument_table['group-owner'] = arg
argument_table['source-security-group-owner-id']._UNDOCUMENTED = True
def _check_args(parsed_args, **kwargs):
# This function checks the parsed args. If the user specified
# the --ip-permissions option with any of the scalar options we
# raise an error.
arg_dict = vars(parsed_args)
if arg_dict['ip_permissions']:
for key in ('protocol', 'port', 'cidr',
'source_group', 'group_owner'):
if arg_dict[key]:
msg = ('The --%s option is not compatible '
'with the --ip-permissions option ') % key
raise ValueError(msg)
def _add_docs(help_command, **kwargs):
doc = help_command.doc
doc.style.new_paragraph()
doc.style.start_note()
msg = ('To specify multiple rules in a single command '
'use the <code>--ip-permissions</code> option')
doc.include_doc_string(msg)
doc.style.end_note()
EVENTS = [
('building-argument-table.ec2.authorize-security-group-ingress',
_add_params),
('building-argument-table.ec2.authorize-security-group-egress',
_add_params),
('building-argument-table.ec2.revoke-security-group-ingress', _add_params),
('building-argument-table.ec2.revoke-security-group-egress', _add_params),
('operation-args-parsed.ec2.authorize-security-group-ingress',
_check_args),
('operation-args-parsed.ec2.authorize-security-group-egress', _check_args),
('operation-args-parsed.ec2.revoke-security-group-ingress', _check_args),
('operation-args-parsed.ec2.revoke-security-group-egress', _check_args),
('doc-description.ec2.authorize-security-group-ingress', _add_docs),
('doc-description.ec2.authorize-security-group-egress', _add_docs),
('doc-description.ec2.revoke-security-group-ingress', _add_docs),
('doc-description.ec2.revoke-security-groupdoc-ingress', _add_docs),
]
PROTOCOL_DOCS = ('<p>The IP protocol: <code>tcp</code> | '
'<code>udp</code> | <code>icmp</code></p> '
'<p>(VPC only) Use <code>all</code> to specify all protocols.</p>'
'<p>If this argument is provided without also providing the '
'<code>port</code> argument, then it will be applied to all '
'ports for the specified protocol.</p>')
PORT_DOCS = ('<p>For TCP or UDP: The range of ports to allow.'
' A single integer or a range (<code>min-max</code>).</p>'
'<p>For ICMP: A single integer or a range (<code>type-code</code>)'
' representing the ICMP type'
' number and the ICMP code number respectively.'
' A value of -1 indicates all ICMP codes for'
' all ICMP types. A value of -1 just for <code>type</code>'
' indicates all ICMP codes for the specified ICMP type.</p>')
CIDR_DOCS = '<p>The IPv4 address range, in CIDR format.</p>'
SOURCEGROUP_DOCS = ('<p>The name or ID of the source security group.</p>')
GROUPOWNER_DOCS = ('<p>The AWS account ID that owns the source security '
'group. Cannot be used when specifying a CIDR IP '
'address.</p>')
def register_secgroup(event_handler):
for event, handler in EVENTS:
event_handler.register(event, handler)
def _build_ip_permissions(params, key, value):
if 'IpPermissions' not in params:
params['IpPermissions'] = [{}]
if key == 'CidrIp':
if 'IpRanges' not in params['ip_permissions'][0]:
params['IpPermissions'][0]['IpRanges'] = []
params['IpPermissions'][0]['IpRanges'].append(value)
elif key in ('GroupId', 'GroupName', 'UserId'):
if 'UserIdGroupPairs' not in params['IpPermissions'][0]:
params['IpPermissions'][0]['UserIdGroupPairs'] = [{}]
params['IpPermissions'][0]['UserIdGroupPairs'][0][key] = value
else:
params['IpPermissions'][0][key] = value
class ProtocolArgument(CustomArgument):
def add_to_params(self, parameters, value):
if value:
try:
int_value = int(value)
if (int_value < 0 or int_value > 255) and int_value != -1:
msg = ('protocol numbers must be in the range 0-255 '
'or -1 to specify all protocols')
raise ValueError(msg)
except ValueError:
if value not in ('tcp', 'udp', 'icmp', 'all'):
msg = ('protocol parameter should be one of: '
'tcp|udp|icmp|all or any valid protocol number.')
raise ValueError(msg)
if value == 'all':
value = '-1'
_build_ip_permissions(parameters, 'IpProtocol', value)
class PortArgument(CustomArgument):
def add_to_params(self, parameters, value):
if value:
try:
if value == '-1' or value == 'all':
fromstr = '-1'
tostr = '-1'
elif '-' in value:
# We can get away with simple logic here because
# argparse will not allow values such as
# "-1-8", and these aren't actually valid
# values any from from/to ports.
fromstr, tostr = value.split('-', 1)
else:
fromstr, tostr = (value, value)
_build_ip_permissions(parameters, 'FromPort', int(fromstr))
_build_ip_permissions(parameters, 'ToPort', int(tostr))
except ValueError:
msg = ('port parameter should be of the '
'form <from[-to]> (e.g. 22 or 22-25)')
raise ValueError(msg)
class CidrArgument(CustomArgument):
def add_to_params(self, parameters, value):
if value:
value = [{'CidrIp': value}]
_build_ip_permissions(parameters, 'IpRanges', value)
class SourceGroupArgument(CustomArgument):
def add_to_params(self, parameters, value):
if value:
if value.startswith('sg-'):
_build_ip_permissions(parameters, 'GroupId', value)
else:
_build_ip_permissions(parameters, 'GroupName', value)
class GroupOwnerArgument(CustomArgument):
def add_to_params(self, parameters, value):
if value:
_build_ip_permissions(parameters, 'UserId', value)