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| author | Stephan Mueller <smueller@chronox.de> | 2015-05-25 16:09:14 +0300 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2015-05-27 12:51:53 +0300 |
| commit | 3d6a5f75d1340539dcdcec4609761fa4b836a1f2 (patch) | |
| tree | d19d3ccb4f4875c20dde086b8d7abe75b807a159 /include/crypto | |
| parent | 16b369a91d0dd80be214b7f7801fbc51875454cc (diff) | |
| download | linux-3d6a5f75d1340539dcdcec4609761fa4b836a1f2.tar.xz | |
crypto: drbg - prepare for async seeding
In order to prepare for the addition of the asynchronous seeding call,
the invocation of seeding the DRBG is moved out into a helper function.
In addition, a block of memory is allocated during initialization time
that will be used as a scratchpad for obtaining entropy. That scratchpad
is used for the initial seeding operation as well as by the
asynchronous seeding call. The memory must be zeroized every time the
DRBG seeding call succeeds to avoid entropy data lingering in memory.
CC: Andreas Steffen <andreas.steffen@strongswan.org>
CC: Theodore Ts'o <tytso@mit.edu>
CC: Sandy Harris <sandyinchina@gmail.com>
Signed-off-by: Stephan Mueller <smueller@chronox.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'include/crypto')
| -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 480d7a0f4dac..b0526981aa85 100644 --- a/include/crypto/drbg.h +++ b/include/crypto/drbg.h @@ -119,6 +119,8 @@ struct drbg_state { bool fips_primed; /* Continuous test primed? */ unsigned char *prev; /* FIPS 140-2 continuous test value */ #endif + u8 *seed_buf; /* buffer holding the seed */ + size_t seed_buf_len; const struct drbg_state_ops *d_ops; const struct drbg_core *core; struct drbg_string test_data; |