Fix ec_GFp_simple_cmp.

[openssl.git] / crypto / ec / ecp_smpl.c

diff --git a/crypto/ec/ecp_smpl.c b/crypto/ec/ecp_smpl.c
index 204dafab2a2befa2b9fdc4b2a7bcda2ae20a2acb..4c23b71020db52f268728161cb3e80d6b6ca8e59 100644 (file)
--- a/crypto/ec/ecp_smpl.c
+++ b/crypto/ec/ecp_smpl.c
@@ -1409,13 +1409,18 @@ int ec_GFp_simple_cmp(const EC_GROUP *group, const EC_POINT *a, const EC_POINT *
                {
                if (!field_mul(group, Zb23, Zb23, &b->Z, ctx)) goto end;
                if (!field_mul(group, tmp1, &a->Y, Zb23, ctx)) goto end;
+               /* tmp1_ = tmp1 */
                }
+       else
+               tmp1_ = &a->Y;
        if (!a->Z_is_one)
                {
                if (!field_mul(group, Za23, Za23, &a->Z, ctx)) goto end;
                if (!field_mul(group, tmp2, &b->Y, Za23, ctx)) goto end;
+               /* tmp2_ = tmp2 */
                }
-       /* tmp1_ and tmp2_ are still ok */
+       else
+               tmp2_ = &b->Y;
 
        /* compare  Y_a*Z_b^3  with  Y_b*Z_a^3 */
        if (BN_cmp(tmp1_, tmp2_) != 0)