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Implement "curve448-sha512" kex, from RFC 8731.

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With all the preparation now in place, this is more or less trivial.
We add a new curve setup function in sshecc.c, and an ssh_kex linking
to it; we add the curve parameters to the reference / test code
eccref.py, and use them to generate the list of low-order input values
that should be rejected by the sanity check on the kex output; we add
the standard test vectors from RFC 7748 in cryptsuite.py, and the
low-order values we just generated.
This commit is contained in:
Simon Tatham
2020-02-29 06:00:39 +00:00
parent 75e7ddea02
commit 31e5b621b5
5 changed files with 98 additions and 10 deletions
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test/eccref.py
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@ -316,6 +316,9 @@ p521.G_order = 0x01fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff
curve25519 = MontgomeryCurve(2**255-19, 0x76d06, 1)
curve25519.G = curve25519.cpoint(9)
curve448 = MontgomeryCurve(2**448-2**224-1, 0x262a6, 1)
curve448.G = curve448.cpoint(5)
ed25519 = TwistedEdwardsCurve(2**255-19, 0x52036cee2b6ffe738cc740797779e89800700a4d4141d8ab75eb4dca135978a3, -1)
ed25519.G = ed25519.point(0x216936d3cd6e53fec0a4e231fdd6dc5c692cc7609525a7b2c9562d608f25d51a,0x6666666666666666666666666666666666666666666666666666666666666658)
ed25519.G_order = 0x1000000000000000000000000000000014def9dea2f79cd65812631a5cf5d3ed