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Introduce separate _clear functions for hash module

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This gives the caller more control about whether the state should
be cleaned (= should be considered secret). Moreover, it gives the
caller the possibility to clean a hash struct without finalizing it.
This commit is contained in:
Tim Ruffing
2020-04-27 18:55:36 +02:00
committed by Sebastian Falbesoner
parent 99cc9fd6d0
commit 349e6ab916
8 changed files with 26 additions and 7 deletions
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4
src/modules/musig/session_impl.h
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@@ -386,10 +386,10 @@ static void secp256k1_nonce_function_musig(secp256k1_scalar *k, const unsigned c
/* Attempt to erase secret data */
secp256k1_memclear(buf, sizeof(buf));
secp256k1_memclear(&sha_tmp, sizeof(sha_tmp));
secp256k1_sha256_clear(&sha_tmp);
}
secp256k1_memclear(rand, sizeof(rand));
secp256k1_memclear(&sha, sizeof(sha));
secp256k1_sha256_clear(&sha);
}
int secp256k1_musig_nonce_gen_internal(const secp256k1_context* ctx, secp256k1_musig_secnonce *secnonce, secp256k1_musig_pubnonce *pubnonce, const unsigned char *input_nonce, const unsigned char *seckey, const secp256k1_pubkey *pubkey, const unsigned char *msg32, const secp256k1_musig_keyagg_cache *keyagg_cache, const unsigned char *extra_input32) {