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Test demonstrating discrepancy in sqr output

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This commit is contained in:
Peter Dettman
2014-06-22 15:03:29 +07:00
committed by Pieter Wuille
parent 5e53856862
commit 59447da38d
3 changed files with 47 additions and 0 deletions
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19
src/field_5x52_impl.h
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@@ -33,6 +33,25 @@
void static secp256k1_fe_inner_start(void) {}
void static secp256k1_fe_inner_stop(void) {}
#ifdef VERIFY
int static secp256k1_fe_verify(const secp256k1_fe_t * a) {
const uint64_t *d = a->n;
int m = a->magnitude, r = 1;
r &= (d[0] <= 0xFFFFFFFFFFFFFULL * m);
r &= (d[1] <= 0xFFFFFFFFFFFFFULL * m);
r &= (d[2] <= 0xFFFFFFFFFFFFFULL * m);
r &= (d[3] <= 0xFFFFFFFFFFFFFULL * m);
r &= (d[4] <= 0x0FFFFFFFFFFFFULL * m);
if (a->normalized) {
r &= (m == 1);
if (r && (d[4] == 0x0FFFFFFFFFFFFULL) && ((d[3] & d[2] & d[1]) == 0xFFFFFFFFFFFFFULL)) {
r &= (d[0] < 0xFFFFEFFFFFC2FULL);
}
}
return r;
}
#endif
void static secp256k1_fe_normalize(secp256k1_fe_t *r) {
uint64_t t0 = r->n[0], t1 = r->n[1], t2 = r->n[2], t3 = r->n[3], t4 = r->n[4];