70 lines
3.1 KiB
Python
Executable file
70 lines
3.1 KiB
Python
Executable file
from k5test import *
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import re
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# Run "kvno server" with a fresh set of client tickets, then check that the
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# enctypes in the service ticket match the expected values.
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etypes_re = re.compile(r'server@[^\n]+\n\tEtype \(skey, tkt\): '
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r'([^,]+), ([^\s]+)')
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def test_kvno(realm, expected_skey, expected_tkt):
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realm.kinit(realm.user_princ, password('user'))
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realm.run([kvno, 'server'])
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output = realm.run([klist, '-e'])
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m = etypes_re.search(output)
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if not m:
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fail('could not parse etypes from klist -e output')
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skey, tkt = m.groups()
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if skey != expected_skey:
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fail('got session key type %s, expected %s' % (skey, expected_skey))
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if tkt != expected_tkt:
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fail('got ticket key type %s, expected %s' % (tkt, expected_tkt))
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conf1 = {'libdefaults': {'default_tgs_enctypes': 'aes128-cts,aes256-cts'}}
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conf2 = {'libdefaults': {'default_tgs_enctypes': 'aes256-cts,aes128-cts'}}
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conf3 = {'libdefaults': {
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'allow_weak_crypto': 'true',
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'default_tkt_enctypes': 'aes128-cts',
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'default_tgs_enctypes': 'rc4-hmac,aes128-cts'}}
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conf4 = {'libdefaults': {'permitted_enctypes': 'aes256-cts'}}
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# Test with client request and session_enctypes preferring aes128, but
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# aes256 long-term key.
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realm = K5Realm(krb5_conf=conf1, create_host=False, get_creds=False)
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realm.run([kadminl, 'addprinc', '-randkey', '-e', 'aes256-cts', 'server'])
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realm.run([kadminl, 'setstr', 'server', 'session_enctypes',
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'aes128-cts,aes256-cts'])
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test_kvno(realm, 'aes128-cts-hmac-sha1-96', 'aes256-cts-hmac-sha1-96')
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realm.stop()
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# Second go, almost same as first, but resulting session key must be aes256
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# because of the difference in default_tgs_enctypes order. This tests that
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# session_enctypes doesn't change the order in which we negotiate.
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realm = K5Realm(krb5_conf=conf2, create_host=False, get_creds=False)
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realm.run([kadminl, 'addprinc', '-randkey', '-e', 'aes256-cts', 'server'])
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realm.run([kadminl, 'setstr', 'server', 'session_enctypes',
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'aes128-cts,aes256-cts'])
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test_kvno(realm, 'aes256-cts-hmac-sha1-96', 'aes256-cts-hmac-sha1-96')
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realm.stop()
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# Next we use conf3 and try various things.
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realm = K5Realm(krb5_conf=conf3, create_host=False, get_creds=False)
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realm.run([kadminl, 'addprinc', '-randkey', '-e', 'aes256-cts:normal',
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'server'])
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# 3a: Negotiate aes128 session key when principal only has aes256 long-term.
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realm.run([kadminl, 'setstr', 'server', 'session_enctypes',
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'aes128-cts,aes256-cts'])
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test_kvno(realm, 'aes128-cts-hmac-sha1-96', 'aes256-cts-hmac-sha1-96')
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# 3b: Negotiate rc4-hmac session key when principal only has aes256 long-term.
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realm.run([kadminl, 'setstr', 'server', 'session_enctypes',
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'rc4-hmac,aes128-cts,aes256-cts'])
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test_kvno(realm, 'DEPRECATED:arcfour-hmac', 'aes256-cts-hmac-sha1-96')
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realm.stop()
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# 4: Check that permitted_enctypes is a default for session key enctypes.
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realm = K5Realm(krb5_conf=conf4, create_host=False, get_creds=False)
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realm.kinit(realm.user_princ, password('user'))
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realm.run([kvno, 'user'],
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expected_trace=('etypes requested in TGS request: aes256-cts',))
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realm.stop()
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success('sesskeynego')
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