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IIS parser: support IPv6 addresses with a zone index #5188

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IIS parser: support IPv6 addresses with a zone index #5188

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10 changes: 9 additions & 1 deletion plaso/parsers/text_plugins/iis.py
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Original file line number Diff line number Diff line change
Expand Up @@ -95,9 +95,17 @@ class WinIISTextPlugin(interface.TextPlugin):
lambda tokens: int(tokens[0], 10)
)

# A scoped literal IPv6 address has a zone index suffix, such as "%3" or
# "%eth0", which pyparsing_common.ipv6_address does not support.
_ZONE_INDEX = pyparsing.Combine(
pyparsing.Literal("%") + pyparsing.Word(pyparsing.alphanums)
)

_IP_ADDRESS = (
pyparsing.pyparsing_common.ipv4_address
| pyparsing.pyparsing_common.ipv6_address
| pyparsing.Combine(
pyparsing.pyparsing_common.ipv6_address + pyparsing.Opt(_ZONE_INDEX)
)
| _BLANK
)

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20 changes: 20 additions & 0 deletions tests/parsers/text_plugins/iis.py
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Original file line number Diff line number Diff line change
Expand Up @@ -11,6 +11,26 @@
class WinIISTextPluginTest(test_lib.TextPluginTestCase):
"""Tests for the Windows IIS text parser plugin."""

# pylint: disable=protected-access

def testIPAddressWithZoneIndex(self):
"""Tests the _IP_ADDRESS structure with a scoped IPv6 address."""
plugin = iis.WinIISTextPlugin()

structure = plugin._IP_ADDRESS.parse_string(
"fe80::1ff:fe23:4567:890a%3", parse_all=True
)
self.assertEqual(structure[0], "fe80::1ff:fe23:4567:890a%3")

structure = plugin._IP_ADDRESS.parse_string("fe80::1%eth0", parse_all=True)
self.assertEqual(structure[0], "fe80::1%eth0")

structure = plugin._IP_ADDRESS.parse_string("::1", parse_all=True)
self.assertEqual(structure[0], "::1")

structure = plugin._IP_ADDRESS.parse_string("10.10.10.100", parse_all=True)
self.assertEqual(structure[0], "10.10.10.100")

def testProcessWithIIS6Log(self):
"""Tests the Process function with an IIS 6 log file."""
plugin = iis.WinIISTextPlugin()
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