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cryptsuite: gracefully handle unavailable HW accel.

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Hardware-accelerated GCM and AES implementations which were compiled in,
but unavailable at runtime, would cause GCM tests to give errors.
This commit is contained in:
Jacob Nevins 2023-08-22 19:05:21 +01:00
parent a1d80e41dd
commit 5ced517428
1 changed files with 5 additions and 1 deletions
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6
test/cryptsuite.py
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@ -2946,8 +2946,9 @@ Private-MAC: 5b1f6f4cc43eb0060d2c3e181bc0129343adba2b
def aesgcm(key, iv, aes_impl, gcm_impl):
c = ssh_cipher_new('aes{:d}_gcm_{}'.format(8*len(key), aes_impl))
if c is None: return None, None # skip test if HW AES not available
m = ssh2_mac_new('aesgcm_{}'.format(gcm_impl), c)
if m is None: return # skip test if HW GCM not available
if m is None: return None, None # skip test if HW GCM not available
c.setkey(key)
c.setiv(iv + b'\0'*4)
m.setkey(b'')
@ -3001,6 +3002,7 @@ Private-MAC: 5b1f6f4cc43eb0060d2c3e181bc0129343adba2b
'5b60142bfcf4e5b0a9ada3451799866e')
c, m = aesgcm(key, iv, aes_impl, gcm_impl)
if c is None or m is None: return # skip if HW impl unavailable
len_dec = c.decrypt_length(aad, 123)
self.assertEqual(len_dec, aad) # length not actually encrypted
m.start()
@ -3098,9 +3100,11 @@ Private-MAC: 5b1f6f4cc43eb0060d2c3e181bc0129343adba2b
for impl in get_aes_impls():
with self.subTest(aes_impl=impl):
gcm = ssh_cipher_new('aes{:d}_gcm_{}'.format(8*len(key), impl))
if gcm is None: continue # skip if HW AES unavailable
gcm.setkey(key)
cbc = ssh_cipher_new('aes{:d}_cbc_{}'.format(8*len(key), impl))
# assume if gcm_<impl> is available, cbc_<impl> will be too
cbc.setkey(key)
# A simple test to ensure the low word gets