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authorHerbert Xu <herbert@gondor.apana.org.au>2015-01-04 23:44:09 (GMT)
committerHerbert Xu <herbert@gondor.apana.org.au>2015-01-04 23:44:09 (GMT)
commit1471f09f9b874e3bd6a439cae7fc34261dc6f7dd (patch)
tree6e0c453545d8c514ad73cc8896d653d846351fef /crypto
parent2f3755381da8d592656f1ef6868fa9f96c450ba9 (diff)
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')
-rw-r--r--crypto/drbg.c23
1 files changed, 11 insertions, 12 deletions
diff --git a/crypto/drbg.c b/crypto/drbg.c
index 9613839..d8ff16e 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;
}

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