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First step in converting to C: num

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This commit is contained in:
Pieter Wuille
2013-03-24 10:38:35 +01:00
parent 21b74c7e5f
commit 4adf6b2a32
17 changed files with 508 additions and 472 deletions
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74
group.cpp
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@@ -291,13 +291,28 @@ static const unsigned char a2_[] = {0x01,
0x57,0xc1,0x10,0x8d,0x9d,0x44,0xcf,0xd8};
GroupConstants::GroupConstants() : g_x(g_x_), g_y(g_y_),
order(order_, sizeof(order_)),
g(g_x,g_y),
beta(beta_),
lambda(lambda_, sizeof(lambda_)),
a1b2(a1b2_, sizeof(a1b2_)),
b1(b1_, sizeof(b1_)),
a2(a2_, sizeof(a2_)) {}
beta(beta_) {
secp256k1_num_init(&order);
secp256k1_num_init(&lambda);
secp256k1_num_init(&a1b2);
secp256k1_num_init(&b1);
secp256k1_num_init(&a2);
secp256k1_num_set_bin(&order, order_, sizeof(order_));
secp256k1_num_set_bin(&lambda, lambda_, sizeof(lambda_));
secp256k1_num_set_bin(&a1b2, a1b2_, sizeof(a1b2_));
secp256k1_num_set_bin(&b1, b1_, sizeof(b1_));
secp256k1_num_set_bin(&a2, a2_, sizeof(a2_));
}
GroupConstants::~GroupConstants() {
secp256k1_num_free(&order);
secp256k1_num_free(&lambda);
secp256k1_num_free(&a1b2);
secp256k1_num_free(&b1);
secp256k1_num_free(&a2);
}
const GroupConstants &GetGroupConst() {
static const GroupConstants group_const;
@@ -310,27 +325,40 @@ void GroupElemJac::SetMulLambda(const GroupElemJac &p) {
x.SetMult(x, beta);
}
void SplitExp(const Number &exp, Number &exp1, Number &exp2) {
void SplitExp(const secp256k1_num_t &exp, secp256k1_num_t &exp1, secp256k1_num_t &exp2) {
const GroupConstants &c = GetGroupConst();
Number bnc1, bnc2, bnt1, bnt2, bnn2;
bnn2.SetNumber(c.order);
bnn2.Shift1();
secp256k1_num_t bnc1, bnc2, bnt1, bnt2, bnn2;
bnc1.SetMult(exp, c.a1b2);
bnc1.SetAdd(bnc1, bnn2);
bnc1.SetDiv(bnc1, c.order);
secp256k1_num_init(&bnc1);
secp256k1_num_init(&bnc2);
secp256k1_num_init(&bnt1);
secp256k1_num_init(&bnt2);
secp256k1_num_init(&bnn2);
bnc2.SetMult(exp, c.b1);
bnc2.SetAdd(bnc2, bnn2);
bnc2.SetDiv(bnc2, c.order);
secp256k1_num_copy(&bnn2, &c.order);
secp256k1_num_shift(&bnn2, 1);
bnt1.SetMult(bnc1, c.a1b2);
bnt2.SetMult(bnc2, c.a2);
bnt1.SetAdd(bnt1, bnt2);
exp1.SetSub(exp, bnt1);
bnt1.SetMult(bnc1, c.b1);
bnt2.SetMult(bnc2, c.a1b2);
exp2.SetSub(bnt1, bnt2);
secp256k1_num_mul(&bnc1, &exp, &c.a1b2);
secp256k1_num_add(&bnc1, &bnc1, &bnn2);
secp256k1_num_div(&bnc1, &bnc1, &c.order);
secp256k1_num_mul(&bnc2, &exp, &c.b1);
secp256k1_num_add(&bnc2, &bnc2, &bnn2);
secp256k1_num_div(&bnc2, &bnc2, &c.order);
secp256k1_num_mul(&bnt1, &bnc1, &c.a1b2);
secp256k1_num_mul(&bnt2, &bnc2, &c.a2);
secp256k1_num_add(&bnt1, &bnt1, &bnt2);
secp256k1_num_sub(&exp1, &exp, &bnt1);
secp256k1_num_mul(&bnt1, &bnc1, &c.b1);
secp256k1_num_mul(&bnt2, &bnc2, &c.a1b2);
secp256k1_num_sub(&exp2, &bnt1, &bnt2);
secp256k1_num_free(&bnc1);
secp256k1_num_free(&bnc2);
secp256k1_num_free(&bnt1);
secp256k1_num_free(&bnt2);
secp256k1_num_free(&bnn2);
}
}