This repository was archived by the owner on Oct 31, 2023. It is now read-only.
This repository was archived by the owner on Oct 31, 2023. It is now read-only.
How to read G1Affine/G2Affine from compressed bytes #17
Description
Heyho! Thanks for building this library. I successfully built a drand verifier on top of it.
However, I wonder what the proper way to create G1Affine/G2Affine from the compressed point serialization is? The following works for me
use paired::bls12_381::{G1Affine, G1Compressed, G2Affine, G2Compressed};
use paired::EncodedPoint;
pub fn g1_from_variable(data: &[u8]) -> G1Affine {
if data.len() != G1Compressed::size() {
panic!("Invalid length");
}
let mut buf = [0u8; 48];
for i in 0..48 {
buf[i] = data[i];
}
g1_from_fixed(buf)
}
pub fn g1_from_fixed(data: [u8; 48]) -> G1Affine {
G1Compressed(data).into_affine().unwrap()
}
pub fn g2_from_variable(data: &[u8]) -> G2Affine {
if data.len() != G2Compressed::size() {
panic!("Invalid length");
}
let mut buf = [0u8; 96];
for i in 0..96 {
buf[i] = data[i];
}
g2_from_fixed(buf)
}
pub fn g2_from_fixed(data: [u8; 96]) -> G2Affine {
G2Compressed(data).into_affine().unwrap()
}but it requires to make the field in G1Compressed/G2Compressed. So far I avoided looking into serde_impl since this appears to be too simple to require serde. Am I missing something? Is there a better way to do that?