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| author | Stephan Mueller <smueller@chronox.de> | 2019-05-08 17:19:24 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-06-25 12:49:12 +0300 |
| commit | 667b23513ecdd811db8837c406e6292e6f9487ac (patch) | |
| tree | e33ba7122b8e4b6a1547e11ef4c5f999ec51fff1 /include | |
| parent | 66f1abda14a6789348cb9f5f676ae59e2de78ebd (diff) | |
| download | linux-667b23513ecdd811db8837c406e6292e6f9487ac.tar.xz | |
crypto: drbg - add FIPS 140-2 CTRNG for noise source
commit db07cd26ac6a418dc2823187958edcfdb415fa83 upstream.
FIPS 140-2 section 4.9.2 requires a continuous self test of the noise
source. Up to kernel 4.8 drivers/char/random.c provided this continuous
self test. Afterwards it was moved to a location that is inconsistent
with the FIPS 140-2 requirements. The relevant patch was
e192be9d9a30555aae2ca1dc3aad37cba484cd4a .
Thus, the FIPS 140-2 CTRNG is added to the DRBG when it obtains the
seed. This patch resurrects the function drbg_fips_continous_test that
existed some time ago and applies it to the noise sources. The patch
that removed the drbg_fips_continous_test was
b3614763059b82c26bdd02ffcb1c016c1132aad0 .
The Jitter RNG implements its own FIPS 140-2 self test and thus does not
need to be subjected to the test in the DRBG.
The patch contains a tiny fix to ensure proper zeroization in case of an
error during the Jitter RNG data gathering.
Signed-off-by: Stephan Mueller <smueller@chronox.de>
Reviewed-by: Yann Droneaud <ydroneaud@opteya.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/crypto/drbg.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/crypto/drbg.h b/include/crypto/drbg.h index c027a1f7d013..97b386c1fcc9 100644 --- a/include/crypto/drbg.h +++ b/include/crypto/drbg.h @@ -129,6 +129,8 @@ struct drbg_state { bool seeded; /* DRBG fully seeded? */ bool pr; /* Prediction resistance enabled? */ + bool fips_primed; /* Continuous test primed? */ + unsigned char *prev; /* FIPS 140-2 continuous test value */ struct work_struct seed_work; /* asynchronous seeding support */ struct crypto_rng *jent; const struct drbg_state_ops *d_ops; |