frost/secp256k1-zkp
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Use secp256k1_memclear() to clear stack memory instead of memset()

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All of the invocations of secp256k1_memclear() operate on stack
memory and happen after the function is done with the memory object.
This commit replaces existing memset() invocations and also adds
secp256k1_memclear() to code locations where clearing was missing;
there is no guarantee that this commit covers all code locations
where clearing is necessary.

Co-Authored-By: isle2983 <isle2983@yahoo.com>
This commit is contained in:
Tim Ruffing
2019-06-08 13:54:14 +02:00
committed by Sebastian Falbesoner
parent e3497bbf00
commit 9bb368d146
8 changed files with 23 additions and 21 deletions
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2
src/modules/schnorrsig/main_impl.h
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@@ -187,7 +187,7 @@ static int secp256k1_schnorrsig_sign_internal(const secp256k1_context* ctx, unsi
secp256k1_memczero(sig64, 64, !ret);
secp256k1_scalar_clear(&k);
secp256k1_scalar_clear(&sk);
memset(seckey, 0, sizeof(seckey));
secp256k1_memclear(seckey, sizeof(seckey));
return ret;
}