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crypto: ecdh - add privkey generation support

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Add support for generating ecc private keys.

Generation of ecc private keys is helpful in a user-space to kernel
ecdh offload because the keys are not revealed to user-space. Private
key generation is also helpful to implement forward secrecy.

If the user provides a NULL ecc private key, the kernel will generate it
and further use it for ecdh.

Move ecdh's object files below drbg's. drbg must be present in the kernel
at the time of calling.

Signed-off-by: Tudor Ambarus <[email protected]>
Reviewed-by: Stephan Müller <[email protected]>
Signed-off-by: Herbert Xu <[email protected]>
This commit is contained in:
Tudor-Dan Ambarus 2017-05-30 17:52:48 +03:00 • committed by Herbert Xu
commit 6755fd269d
5 changed files with 80 additions and 4 deletions
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1
crypto/Kconfig
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@ -130,6 +130,7 @@ config CRYPTO_DH
config CRYPTO_ECDH
tristate "ECDH algorithm"
select CRYTPO_KPP
select CRYPTO_RNG_DEFAULT
help
Generic implementation of the ECDH algorithm