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test_invalid.doctest - test for invalid PSKC file
Copyright (C) 2014-2015 Arthur de Jong
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301 USA
>>> from binascii import a2b_hex
>>> from pskc import PSKC
Load a number of invalid files.
This file is plain invalid XML.
>>> pskc = PSKC('tests/invalid-notxml.pskcxml')
Traceback (most recent call last):
...
ParseError: Error parsing XML
This XML file has a wrong top-level element.
>>> pskc = PSKC('tests/invalid-wrongelement.pskcxml')
Traceback (most recent call last):
...
ParseError: Missing KeyContainer
This file has an unknown PSKC version.
>>> pskc = PSKC('tests/invalid-wrongversion.pskcxml')
Traceback (most recent call last):
...
ParseError: Unsupported version
This PSKC file has one key with an unknown algorithm and one key without an
algorithm specified.
>>> pskc = PSKC('tests/invalid-encryption.pskcxml')
>>> key = pskc.keys[0]
>>> key.id
'12345678'
>>> key.secret
Traceback (most recent call last):
...
DecryptionError: No key available
>>> pskc.encryption.key = a2b_hex('12345678901234567890123456789012')
>>> key.secret
Traceback (most recent call last):
...
DecryptionError: Unsupported algorithm: ...
>>> key = pskc.keys[1]
>>> key.id
'45678901'
>>> key.secret
Traceback (most recent call last):
...
DecryptionError: No algorithm specified
Specify an unknown key derivation algorithm specified.
>>> pskc = PSKC('tests/rfc6030-figure7.pskcxml')
>>> pskc.encryption.derivation.algorithm = 'unknown'
>>> pskc.encryption.derive_key('qwerty')
Traceback (most recent call last):
...
KeyDerivationError: Unsupported algorithm: ...
Figure 6 does use encryption but with a pre-shared key. Attempting key
derivation with such a PSKC file should result in an exception.
>>> pskc = PSKC('tests/rfc6030-figure6.pskcxml')
>>> pskc.encryption.derive_key('qwerty')
Traceback (most recent call last):
...
KeyDerivationError: No algorithm specified
Specify an unknown PBKDF2 PRF (pseudorandom function).
>>> pskc = PSKC('tests/rfc6030-figure7.pskcxml')
>>> pskc.encryption.derivation.pbkdf2_prf = 'unknown'
>>> pskc.encryption.derive_key('qwerty')
Traceback (most recent call last):
...
KeyDerivationError: Pseudorandom function unsupported: ...
There is a ValueMAC element but no MACMethod element.
>>> pskc = PSKC('tests/invalid-no-mac-method.pskcxml')
>>> pskc.encryption.key = a2b_hex('12345678901234567890123456789012')
>>> key = pskc.keys[0]
>>> key.id
'12345678'
>>> key.secret
Traceback (most recent call last):
...
DecryptionError: No MAC key available
There is an unknown algorithm specified in MACMethod.
>>> pskc = PSKC('tests/invalid-mac-algorithm.pskcxml')
>>> pskc.encryption.key = a2b_hex('12345678901234567890123456789012')
>>> key = pskc.keys[0]
>>> key.id
'12345678'
>>> key.secret
Traceback (most recent call last):
...
DecryptionError: Unsupported MAC algorithm: ...
The MAC value does not match the calculated MAC, something was modified in
transit.
>>> pskc = PSKC('tests/invalid-mac-value.pskcxml')
>>> pskc.encryption.key = a2b_hex('12345678901234567890123456789012')
>>> key = pskc.keys[0]
>>> key.id
'12345678'
>>> key.secret
Traceback (most recent call last):
...
DecryptionError: MAC value does not match
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