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Posted to commits@milagro.apache.org by sa...@apache.org on 2019/11/15 10:48:04 UTC
[incubator-milagro-crypto-c] 05/06: normalise secret for comparison
in secret recover
This is an automated email from the ASF dual-hosted git repository.
sandreoli pushed a commit to branch review-bls
in repository https://gitbox.apache.org/repos/asf/incubator-milagro-crypto-c.git
commit cc015202131b6e0e286559c6db7aa5c7e419fd5a
Author: samuele-andreoli <sa...@yahoo.it>
AuthorDate: Wed Nov 13 16:21:43 2019 +0000
normalise secret for comparison in secret recover
---
src/bls.c.in | 2 ++
src/bls192.c.in | 2 ++
src/bls256.c.in | 2 ++
3 files changed, 6 insertions(+)
diff --git a/src/bls.c.in b/src/bls.c.in
index 009dabd..e9540c1 100644
--- a/src/bls.c.in
+++ b/src/bls.c.in
@@ -343,6 +343,8 @@ int BLS_ZZZ_RECOVER_SECRET(int k, octet* X, octet* Y, octet* SK)
BIG_XXX_modmul(prod,y,coefs[i],r);
BIG_XXX_add(secret, secret, prod);
+ // Normalise input for comp
+ BIG_XXX_norm(secret);
if (BIG_XXX_comp(secret,r) == 1)
{
BIG_XXX_sub(secret,secret,r);
diff --git a/src/bls192.c.in b/src/bls192.c.in
index 97c631d..7e4a8af 100644
--- a/src/bls192.c.in
+++ b/src/bls192.c.in
@@ -344,6 +344,8 @@ int BLS_ZZZ_RECOVER_SECRET(int k, octet* X, octet* Y, octet* SK)
BIG_XXX_modmul(prod,y,coefs[i],r);
BIG_XXX_add(secret, secret, prod);
+ // Normalise input for comp
+ BIG_XXX_norm(secret);
if (BIG_XXX_comp(secret,r) == 1)
{
BIG_XXX_sub(secret,secret,r);
diff --git a/src/bls256.c.in b/src/bls256.c.in
index f847b3f..215864e 100644
--- a/src/bls256.c.in
+++ b/src/bls256.c.in
@@ -344,6 +344,8 @@ int BLS_ZZZ_RECOVER_SECRET(int k, octet* X, octet* Y, octet* SK)
BIG_XXX_modmul(prod,y,coefs[i],r);
BIG_XXX_add(secret, secret, prod);
+ // Normalise input for comp
+ BIG_XXX_norm(secret);
if (BIG_XXX_comp(secret,r) == 1)
{
BIG_XXX_sub(secret,secret,r);