diff options
| author | Stephan Müller <smueller@chronox.de> | 2021-11-19 07:55:58 +0100 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2021-11-26 16:25:17 +1100 |
| commit | 026a733e66592e743a0905c7fd6b5d3bf89b2d7e (patch) | |
| tree | 017fa67b601ebc24efc2c9bd8ccf4b6d074d2747 /crypto/Kconfig | |
| parent | b808f32023dd8127b0fa27f60fa69a959fd70388 (diff) | |
crypto: kdf - add SP800-108 counter key derivation function
SP800-108 defines three KDFs - this patch provides the counter KDF
implementation.
The KDF is implemented as a service function where the caller has to
maintain the hash / HMAC state. Apart from this hash/HMAC state, no
additional state is required to be maintained by either the caller or
the KDF implementation.
The key for the KDF is set with the crypto_kdf108_setkey function which
is intended to be invoked before the caller requests a key derivation
operation via crypto_kdf108_ctr_generate.
SP800-108 allows the use of either a HMAC or a hash as crypto primitive
for the KDF. When a HMAC primtive is intended to be used,
crypto_kdf108_setkey must be used to set the HMAC key. Otherwise, for a
hash crypto primitve crypto_kdf108_ctr_generate can be used immediately
after allocating the hash handle.
Signed-off-by: Stephan Mueller <smueller@chronox.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'crypto/Kconfig')
| -rw-r--r-- | crypto/Kconfig | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/crypto/Kconfig b/crypto/Kconfig index 285f82647d2b..01b9ca0836a5 100644 --- a/crypto/Kconfig +++ b/crypto/Kconfig @@ -1845,6 +1845,10 @@ config CRYPTO_JITTERENTROPY random numbers. This Jitterentropy RNG registers with the kernel crypto API and can be used by any caller. +config CRYPTO_KDF800108_CTR + tristate + select CRYPTO_HASH + config CRYPTO_USER_API tristate |