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linux/crypto
Vitaly Chikunov a2b797bbec crypto: ecc - check for invalid values in the key verification test
[ Upstream commit 2eb4942b66 ]

Currently used scalar multiplication algorithm (Matthieu Rivain, 2011)
have invalid values for scalar == 1, n-1, and for regularized version
n-2, which was previously not checked. Verify that they are not used as
private keys.

Signed-off-by: Vitaly Chikunov <vt@altlinux.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2019-12-13 08:51:24 +01:00
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