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cryptsuite: add a test of ChaCha20-Poly1305.

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Not a very profound test, but it's at least enough to answer the
question 'is it still returning the same results?' after I change
things.
This commit is contained in:
Simon Tatham 2022-08-16 18:23:52 +01:00
parent 48708def84
commit 3198995ef3
1 changed files with 60 additions and 0 deletions
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60
test/cryptsuite.py
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@ -1799,6 +1799,66 @@ class crypt(MyTestBase):
ssh_cipher_decrypt(cipher, iv[:ivlen])
self.assertEqualBin(ssh_cipher_decrypt(cipher, c), p)
def testChaCha20Poly1305(self):
# A test case of this cipher taken from a real connection to
# OpenSSH.
key = unhex('49e67c5ae596ea7f230e266538d0e373'
'177cc8fe08ff7b642c22d736ca975655'
'c3fb639010fd297ca03c36b20a182ef4'
'0e1272f0c54251c175546ee00b150805')
len_p = unhex('00000128')
len_c = unhex('3ff3677b')
msg_p = unhex('0807000000020000000f736572766572'
'2d7369672d616c6773000000db737368'
'2d656432353531392c736b2d7373682d'
'65643235353139406f70656e7373682e'
'636f6d2c7373682d7273612c7273612d'
'736861322d3235362c7273612d736861'
'322d3531322c7373682d6473732c6563'
'6473612d736861322d6e697374703235'
'362c65636473612d736861322d6e6973'
'74703338342c65636473612d73686132'
'2d6e697374703532312c736b2d656364'
'73612d736861322d6e69737470323536'
'406f70656e7373682e636f6d2c776562'
'617574686e2d736b2d65636473612d73'
'6861322d6e69737470323536406f7065'
'6e7373682e636f6d0000001f7075626c'
'69636b65792d686f7374626f756e6440'
'6f70656e7373682e636f6d0000000130'
'c34aaefcafae6fc2')
msg_c = unhex('bf587eabf385b1281fa9c755d8515dfd'
'c40cb5e993b346e722dce48b1741b4e5'
'ce9ae075f6df0a1d2f72f94f73570125'
'7011630bbb0c7febd767184c0d5aa810'
'47cbce82972129a234b8ac5fc5f2b5be'
'9264baca6d13ff3c9813a61e1f23468f'
'31964b60fc3f0888a227f02c737b2d27'
'b7ae3cd60ede17533863a5bb6bb2d60a'
'c998ccd27e8ba56259f676ed04749fad'
'4114678fb871add3a40625110637947c'
'e91459811622fd3d1fa7eb7efad4b1e8'
'97f3e860473935d3d8df0679a8b0df85'
'aa4124f2d9ac7207abd10719f465c9ed'
'859d2b03bde55315b9024f660ba8d63a'
'64e0beb81e532201df830a52cf221484'
'18d0c4c7da242346161d7320ac534cb5'
'c6b6fec905ee5f424becb9f97c3afbc5'
'5ef4ba369e61bce847158f0dc5bd7227'
'3b8693642db36f87')
mac = unhex('09757178642dfc9f2c38ac5999e0fcfd')
seqno = 3
c = ssh_cipher_new('chacha20_poly1305')
m = ssh2_mac_new('poly1305', c)
c.setkey(key)
self.assertEqualBin(c.encrypt_length(len_p, seqno), len_c)
self.assertEqualBin(c.encrypt(msg_p), msg_c)
m.start()
m.update(ssh_uint32(seqno) + len_c + msg_c)
self.assertEqualBin(m.genresult(), mac)
self.assertEqualBin(c.decrypt_length(len_c, seqno), len_p)
self.assertEqualBin(c.decrypt(msg_c), msg_p)
def testRSAKex(self):
# Round-trip test of the RSA key exchange functions, plus a
# hardcoded plain/ciphertext pair to guard against the