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From d65bcba04f0051ac3ad74be7415da85b1c80a0ad Mon Sep 17 00:00:00 2001
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From: Greg Hudson <ghudson@mit.edu>
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Date: Wed, 11 Jan 2017 10:49:30 -0500
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Subject: [PATCH] Add test case for PKINIT DH renegotiation
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In t_pkinit.py, add a PKINIT test case where the KDC sends
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KDC_ERR_DH_KEY_PARAMETERS_NOT_ACCEPTED and the client retries with the
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KDC's TD_DH_PARAMETERS value, using the clpreauth tryagain method.
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Use the trace log to verify that the renegotiation actually takes
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place.
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(cherry picked from commit 7ad7eb7fd591e6c789ea24b94eccbf74ee4d79f8)
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---
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src/tests/t_pkinit.py | 18 ++++++++++++++++++
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1 file changed, 18 insertions(+)
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diff --git a/src/tests/t_pkinit.py b/src/tests/t_pkinit.py
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index ac4d326b6..183977750 100755
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--- a/src/tests/t_pkinit.py
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+++ b/src/tests/t_pkinit.py
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@@ -174,6 +174,24 @@ realm.kinit(realm.user_princ,
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'-X', 'flag_RSA_PROTOCOL=yes'])
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realm.klist(realm.user_princ)
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+# Test a DH parameter renegotiation by temporarily setting a 4096-bit
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+# minimum on the KDC.
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+tracefile = os.path.join(realm.testdir, 'trace')
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+minbits_kdc_conf = {'realms': {'$realm': {'pkinit_dh_min_bits': '4096'}}}
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+minbits_env = realm.special_env('restrict', True, kdc_conf=minbits_kdc_conf)
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+realm.stop_kdc()
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+realm.start_kdc(env=minbits_env)
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+realm.run(['env', 'KRB5_TRACE=' + tracefile, kinit, '-X',
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+ 'X509_user_identity=' + file_identity, realm.user_princ])
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+with open(tracefile, 'r') as f:
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+ trace = f.read()
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+if ('Key parameters not accepted' not in trace or
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+ 'Preauth tryagain input types' not in trace or
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+ 'trying again with KDC-provided parameters' not in trace):
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+ fail('DH renegotiation steps not found in kinit trace log')
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+realm.stop_kdc()
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+realm.start_kdc()
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+
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# Run the basic test - PKINIT with FILE: identity, with a password on the key,
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# supplied by the prompter.
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# Expect failure if the responder does nothing, and we have no prompter.
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