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| author | Herbert Xu <herbert@gondor.apana.org.au> | 2015-01-05 10:44:09 +1100 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2015-01-05 10:44:09 +1100 |
| commit | 1471f09f9b874e3bd6a439cae7fc34261dc6f7dd (patch) | |
| tree | 6e0c453545d8c514ad73cc8896d653d846351fef /crypto/drbg.c | |
| parent | 2f3755381da8d592656f1ef6868fa9f96c450ba9 (diff) | |
| download | linux-stable-1471f09f9b874e3bd6a439cae7fc34261dc6f7dd.tar.gz linux-stable-1471f09f9b874e3bd6a439cae7fc34261dc6f7dd.tar.bz2 linux-stable-1471f09f9b874e3bd6a439cae7fc34261dc6f7dd.zip | |
Revert "crypto: drbg - use memzero_explicit() for clearing sensitive data"
This reverts commit 421d82f5b3e75f94e31875e37d45cdf6a557c120.
None of the data zeroed are on the stack so the compiler cannot
optimise them away.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'crypto/drbg.c')
| -rw-r--r-- | crypto/drbg.c | 23 |
1 files changed, 11 insertions, 12 deletions
diff --git a/crypto/drbg.c b/crypto/drbg.c index 96138396ce01..d8ff16e5c322 100644 --- a/crypto/drbg.c +++ b/crypto/drbg.c @@ -98,7 +98,6 @@ */ #include <crypto/drbg.h> -#include <linux/string.h> /*************************************************************** * Backend cipher definitions available to DRBG @@ -491,9 +490,9 @@ static int drbg_ctr_df(struct drbg_state *drbg, ret = 0; out: - memzero_explicit(iv, drbg_blocklen(drbg)); - memzero_explicit(temp, drbg_statelen(drbg)); - memzero_explicit(pad, drbg_blocklen(drbg)); + memset(iv, 0, drbg_blocklen(drbg)); + memset(temp, 0, drbg_statelen(drbg)); + memset(pad, 0, drbg_blocklen(drbg)); return ret; } @@ -567,9 +566,9 @@ static int drbg_ctr_update(struct drbg_state *drbg, struct list_head *seed, ret = 0; out: - memzero_explicit(temp, drbg_statelen(drbg) + drbg_blocklen(drbg)); + memset(temp, 0, drbg_statelen(drbg) + drbg_blocklen(drbg)); if (2 != reseed) - memzero_explicit(df_data, drbg_statelen(drbg)); + memset(df_data, 0, drbg_statelen(drbg)); return ret; } @@ -627,7 +626,7 @@ static int drbg_ctr_generate(struct drbg_state *drbg, len = ret; out: - memzero_explicit(drbg->scratchpad, drbg_blocklen(drbg)); + memset(drbg->scratchpad, 0, drbg_blocklen(drbg)); return len; } @@ -865,7 +864,7 @@ static int drbg_hash_df(struct drbg_state *drbg, } out: - memzero_explicit(tmp, drbg_blocklen(drbg)); + memset(tmp, 0, drbg_blocklen(drbg)); return ret; } @@ -909,7 +908,7 @@ static int drbg_hash_update(struct drbg_state *drbg, struct list_head *seed, ret = drbg_hash_df(drbg, drbg->C, drbg_statelen(drbg), &datalist2); out: - memzero_explicit(drbg->scratchpad, drbg_statelen(drbg)); + memset(drbg->scratchpad, 0, drbg_statelen(drbg)); return ret; } @@ -944,7 +943,7 @@ static int drbg_hash_process_addtl(struct drbg_state *drbg, drbg->scratchpad, drbg_blocklen(drbg)); out: - memzero_explicit(drbg->scratchpad, drbg_blocklen(drbg)); + memset(drbg->scratchpad, 0, drbg_blocklen(drbg)); return ret; } @@ -991,7 +990,7 @@ static int drbg_hash_hashgen(struct drbg_state *drbg, } out: - memzero_explicit(drbg->scratchpad, + memset(drbg->scratchpad, 0, (drbg_statelen(drbg) + drbg_blocklen(drbg))); return len; } @@ -1040,7 +1039,7 @@ static int drbg_hash_generate(struct drbg_state *drbg, drbg_add_buf(drbg->V, drbg_statelen(drbg), u.req, 8); out: - memzero_explicit(drbg->scratchpad, drbg_blocklen(drbg)); + memset(drbg->scratchpad, 0, drbg_blocklen(drbg)); return len; } |