feedc0de/wolfssl
1
0
Fork 0
forked from wolfSSL/wolfssl
Code Pull Requests Activity

Fix with fast math disabled so ecc_projective_add_point uses temp local variable for x,y,z result.

Browse Source
This commit is contained in:
David Garske
2016-05-09 13:29:25 -07:00
parent 8f6352725a
commit d71d0f2cb4
1 changed files with 3 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
wolfcrypt/src/ecc.c
View File

@@ -281,7 +281,7 @@ int ecc_projective_add_point(ecc_point* P, ecc_point* Q, ecc_point* R,
mp_int* modulus, mp_digit* mp) mp_int* modulus, mp_digit* mp)
{ {
mp_int t1, t2; mp_int t1, t2;
#ifdef ALT_ECC_SIZE #if (defined(USE_FAST_MATH) && defined(ALT_ECC_SIZE)) || !defined(USE_FAST_MATH)
mp_int rx, ry, rz; mp_int rx, ry, rz;
#endif #endif
mp_int *x, *y, *z; mp_int *x, *y, *z;
@@ -313,7 +313,7 @@ int ecc_projective_add_point(ecc_point* P, ecc_point* Q, ecc_point* R,
return err; return err;
} }
#ifdef ALT_ECC_SIZE #if (defined(USE_FAST_MATH) && defined(ALT_ECC_SIZE)) || !defined(USE_FAST_MATH)
/* Use local stack variable */ /* Use local stack variable */
x = ℞ x = ℞
y = &ry; y = &ry;
@@ -520,7 +520,7 @@ int ecc_projective_add_point(ecc_point* P, ecc_point* Q, ecc_point* R,
if (err == MP_OKAY) if (err == MP_OKAY)
err = mp_div_2(y, y); err = mp_div_2(y, y);
#ifdef ALT_ECC_SIZE #if (defined(USE_FAST_MATH) && defined(ALT_ECC_SIZE)) || !defined(USE_FAST_MATH)
if (err == MP_OKAY) if (err == MP_OKAY)
err = mp_copy(x, R->x); err = mp_copy(x, R->x);
if (err == MP_OKAY) if (err == MP_OKAY)