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Z will be 0 not 1

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This commit is contained in:
Sean Parkinson
2016-11-11 12:53:48 +10:00
parent 71259113b2
commit 8a7bb3fad4
1 changed files with 2 additions and 2 deletions
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4
wolfcrypt/src/ecc.c
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@@ -1069,7 +1069,7 @@ int ecc_projective_add_point(ecc_point* P, ecc_point* Q, ecc_point* R,
/* if Z is one then these are no-operations */ /* if Z is one then these are no-operations */
if (err == MP_OKAY) { if (err == MP_OKAY) {
if (!mp_isone(Q->z)) { if (!mp_iszero(Q->z)) {
/* T1 = Z' * Z' */ /* T1 = Z' * Z' */
err = mp_sqr(Q->z, &t1); err = mp_sqr(Q->z, &t1);
if (err == MP_OKAY) if (err == MP_OKAY)
@@ -1163,7 +1163,7 @@ int ecc_projective_add_point(ecc_point* P, ecc_point* Q, ecc_point* R,
} }
if (err == MP_OKAY) { if (err == MP_OKAY) {
if (!mp_isone(Q->z)) { if (!mp_iszero(Q->z)) {
/* Z = Z * Z' */ /* Z = Z * Z' */
err = mp_mul(z, Q->z, z); err = mp_mul(z, Q->z, z);
if (err == MP_OKAY) if (err == MP_OKAY)