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Add no_std support to transcript, dalek-ff-group, ed448, ciphersuite, multiexp, schnorr, and monero-generators

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transcript, dalek-ff-group, ed449, and ciphersuite are all usable with no_std
alone. The rest additionally require alloc.

Part of #279.
This commit is contained in:
Luke Parker
2023-04-22 04:38:47 -04:00
parent ef0c901455
commit 1e448dec21
38 changed files with 445 additions and 76 deletions
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11
coins/monero/generators/src/lib.rs
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@@ -2,16 +2,15 @@
//! An implementation of Monero's `ge_fromfe_frombytes_vartime`, simply called
//! `hash_to_point` here, is included, as needed to generate generators.
#![cfg_attr(not(feature = "std"), no_std)]
use lazy_static::lazy_static;
use sha3::{Digest, Keccak256};
use curve25519_dalek::{
constants::ED25519_BASEPOINT_POINT,
edwards::{EdwardsPoint as DalekPoint, CompressedEdwardsY},
};
use curve25519_dalek::edwards::{EdwardsPoint as DalekPoint, CompressedEdwardsY};
use group::Group;
use group::{Group, GroupEncoding};
use dalek_ff_group::EdwardsPoint;
mod varint;
@@ -27,7 +26,7 @@ fn hash(data: &[u8]) -> [u8; 32] {
lazy_static! {
/// Monero alternate generator `H`, used for amounts in Pedersen commitments.
pub static ref H: DalekPoint =
CompressedEdwardsY(hash(&ED25519_BASEPOINT_POINT.compress().to_bytes()))
CompressedEdwardsY(hash(&EdwardsPoint::generator().to_bytes()))
.decompress()
.unwrap()
.mul_by_cofactor();