Add magnitude limits to secp256k1_fe_verify to ensure that it's own tests function correctly.

2015-01-02 07:52:27 -08:00
parent 70ae0d2851
commit 7688e341c5
2 changed files with 2 additions and 0 deletions
--- a/src/field_5x52_impl.h
+++ b/src/field_5x52_impl.h
@@ -43,6 +43,7 @@ static void secp256k1_fe_verify(const secp256k1_fe_t *a) {
    r &= (d[3] <= 0xFFFFFFFFFFFFFULL * m);
    r &= (d[4] <= 0x0FFFFFFFFFFFFULL * m);
    r &= (a->magnitude >= 0);
+    r &= (a->magnitude <= 2048);
    if (a->normalized) {
        r &= (a->magnitude <= 1);
        if (r && (d[4] == 0x0FFFFFFFFFFFFULL) && ((d[3] & d[2] & d[1]) == 0xFFFFFFFFFFFFFULL)) {