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Refactor construction of k query and Stage2Values.

This commit is contained in:
Sean Bowe 2016-09-15 12:59:02 -06:00
parent 97e2f2036d
commit 79ac89d6e9
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GPG Key ID: 95684257D8F8B031
2 changed files with 31 additions and 19 deletions
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25
src/spairs.rs
View File

@ -48,6 +48,31 @@ pub struct Stage2Values {
pub pk_k: Vec<G1>
}
impl Stage2Values {
pub fn new(pk_a: &[G1], pk_b_temp: &[G1], pk_c: &[G1]) -> Self {
let mut pk_k = Vec::with_capacity(pk_a.len()+3);
for ((a, b), c) in pk_a.iter().take(pk_a.len() - 1)
.zip(pk_b_temp.iter().take(pk_b_temp.len() - 1))
.zip(pk_c.iter().take(pk_c.len() - 1))
{
pk_k.push(*a + *b + *c);
}
// Perform Z extention as libsnark does.
pk_k.push(pk_a[pk_a.len() - 1]);
pk_k.push(pk_b_temp[pk_b_temp.len() - 1]);
pk_k.push(pk_c[pk_c.len() - 1]);
Stage2Values {
vk_gamma: G2::one(),
vk_beta_gamma_one: G1::one(),
vk_beta_gamma_two: G2::one(),
pk_k: pk_k
}
}
}
#[derive(Clone, PartialEq, Eq)]
pub struct Spair<G: Group> {
f: G,

25
src/transcript.rs
View File

@ -250,31 +250,18 @@ impl<'a, R: Rng> Transcript<'a, R, RandomCoeffStage1> {
}
pub fn next(self) -> Transcript<'a, R, RandomCoeffStage2> {
let mut pk_k = Vec::with_capacity(self.meta.values.pk_a.len()+3);
for ((&a, &b), &c) in self.meta.values.pk_a.iter().take(self.meta.values.pk_a.len() - 1)
.zip(self.meta.values.pk_b_temp.iter().take(self.meta.values.pk_b_temp.len() - 1))
.zip(self.meta.values.pk_c.iter().take(self.meta.values.pk_c.len() - 1))
{
pk_k.push(a + b + c);
}
// Perform Z extention as libsnark does.
pk_k.push(self.meta.values.pk_a[self.meta.values.pk_a.len() - 1]);
pk_k.push(self.meta.values.pk_b_temp[self.meta.values.pk_b_temp.len() - 1]);
pk_k.push(self.meta.values.pk_c[self.meta.values.pk_c.len() - 1]);
let stage2 = Stage2Values::new(
&self.meta.values.pk_a,
&self.meta.values.pk_b_temp,
&self.meta.values.pk_c
);
Transcript {
meta: RandomCoeffStage2 {
spairs: self.meta.spairs,
powers_of_tau_g1: self.meta.powers_of_tau_g1,
coeffs_1: self.meta.values,
values: Stage2Values {
vk_gamma: G2::one(),
vk_beta_gamma_one: G1::one(),
vk_beta_gamma_two: G2::one(),
pk_k: pk_k
},
values: stage2,
curplayer: 0
},
cs: self.cs,