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Remove Monero as a dependency

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Introduces missing CLSAG checks. The only difference now should be the 
additional rejection of torsioned points, which is relevant to 
https://github.com/serai-dex/serai/issues/25. Considering this is only 
currently used for FROST verification, this should be fine.

Closes https://github.com/serai-dex/serai/issues/19 by making it 
irrelevant.

Increases priority of https://github.com/serai-dex/serai/issues/68, as 
now it's used for the BP generators which are done at first-proof.

Also merges BP's stricter hash_to_point with the library's, since CLSAG 
has the same bound.
This commit is contained in:
Luke Parker
2022-07-26 03:25:57 -04:00
parent ee29f6d6d8
commit 696da8228e
14 changed files with 33 additions and 403 deletions
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17
coins/monero/src/ringct/hash_to_point.rs
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@@ -7,23 +7,8 @@ use dalek_ff_group::field::FieldElement;
use crate::hash;
pub(crate) fn raw_hash_to_point(mut bytes: [u8; 32]) -> EdwardsPoint {
unsafe {
#[link(name = "wrapper")]
extern "C" {
fn c_hash_to_point(key: *const u8);
}
c_hash_to_point(bytes.as_mut_ptr());
}
CompressedEdwardsY::from_slice(&bytes).decompress().unwrap()
}
// This works without issue. It's also 140 times slower (@ 3.5ms), and despite checking it passes
// for all branches, there still could be *some* discrepancy somewhere. There's no reason to use it
// unless we're trying to purge that section of the C static library, which we aren't right now
#[allow(dead_code)]
pub(crate) fn rust_hash_to_point(bytes: [u8; 32]) -> EdwardsPoint {
pub(crate) fn raw_hash_to_point(bytes: [u8; 32]) -> EdwardsPoint {
#[allow(non_snake_case)]
let A = FieldElement::from(486662u64);