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Second step in converting to C: field

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This commit is contained in:
Pieter Wuille
2013-03-30 22:32:16 +01:00
parent e6d142a8dc
commit 910d0de4e4
9 changed files with 558 additions and 545 deletions
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24
ecdsa.cpp
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@@ -8,15 +8,15 @@ namespace secp256k1 {
bool ParsePubKey(GroupElemJac &elem, const unsigned char *pub, int size) {
if (size == 33 && (pub[0] == 0x02 || pub[0] == 0x03)) {
FieldElem x;
x.SetBytes(pub+1);
secp256k1_fe_t x;
secp256k1_fe_set_b32(&x, pub+1);
elem.SetCompressed(x, pub[0] == 0x03);
} else if (size == 65 && (pub[0] == 0x04 || pub[0] == 0x06 || pub[0] == 0x07)) {
FieldElem x,y;
x.SetBytes(pub+1);
y.SetBytes(pub+33);
secp256k1_fe_t x,y;
secp256k1_fe_set_b32(&x, pub+1);
secp256k1_fe_set_b32(&y, pub+33);
elem = GroupElem(x,y);
if ((pub[0] == 0x06 || pub[0] == 0x07) && y.IsOdd() != (pub[0] == 0x07))
if ((pub[0] == 0x06 || pub[0] == 0x07) && secp256k1_fe_is_odd(&y) != (pub[0] == 0x07))
return false;
} else {
return false;
@@ -81,9 +81,9 @@ bool Signature::RecomputeR(secp256k1_num_t &r2, const GroupElemJac &pubkey, cons
secp256k1_num_mod_mul(&u2, &sn, &r, &c.order);
GroupElemJac pr; ECMult(pr, pubkey, u2, u1);
if (!pr.IsInfinity()) {
FieldElem xr; pr.GetX(xr);
xr.Normalize();
unsigned char xrb[32]; xr.GetBytes(xrb);
secp256k1_fe_t xr; pr.GetX(xr);
secp256k1_fe_normalize(&xr);
unsigned char xrb[32]; secp256k1_fe_get_b32(xrb, &xr);
secp256k1_num_set_bin(&r2, xrb, 32);
secp256k1_num_mod(&r2, &r2, &c.order);
ret = true;
@@ -108,11 +108,11 @@ bool Signature::Sign(const secp256k1_num_t &seckey, const secp256k1_num_t &messa
GroupElemJac rp;
ECMultBase(rp, nonce);
FieldElem rx;
secp256k1_fe_t rx;
rp.GetX(rx);
unsigned char b[32];
rx.Normalize();
rx.GetBytes(b);
secp256k1_fe_normalize(&rx);
secp256k1_fe_get_b32(b, &rx);
secp256k1_num_set_bin(&r, b, 32);
secp256k1_num_mod(&r, &r, &c.order);
secp256k1_num_t n;