Merge pull request #83 from iron-fish/no-std-sign

no-std for signing

Author: mat-if

Cargo.toml

@@ -9,11 +9,11 @@ homepage = "https://ironfish.network/"
 repository = "https://github.com/iron-fish/ironfish-frost"
 
 [dependencies]
-blake3 = { version = "1.5.0", optional = true }
+blake3 = { version = "1.5.0", optional = true, default-features = false }
 chacha20 = "0.9.1"
 chacha20poly1305 = "0.10.1"
 ed25519-dalek = { version = "2.1.0", default-features = false, features = ["rand_core", "alloc"] }
-rand_chacha = { version = "0.3.1", optional = true }
+rand_chacha = { version = "0.3.1", optional = true, default-features = false }
 rand_core = { version = "0.6.4", default-features = false, features = ["alloc"] }
 reddsa = { git = "https://github.com/ZcashFoundation/reddsa.git", rev="ed49e9ca0699a6450f6d4a9fe62ff168f5ea1ead", features = ["frost"], default-features = false }
 siphasher = { version = "1.0.0", default-features = false }
@@ -24,8 +24,8 @@ hex-literal = "0.4.1"
 rand = "0.8.5"
 
 [features]
-default = ["dkg", "signing"]
+default = ["dkg", "signing", "std"]
 
 std = ["reddsa/std"]
-signing = ["dep:blake3", "dep:rand_chacha", "std"]
+signing = ["dep:blake3", "dep:rand_chacha"]
 dkg = []

src/nonces.rs

@@ -8,8 +8,19 @@ use crate::participant::Identity;
 use crate::participant::IdentitySerialization;
 use rand_chacha::ChaCha20Rng;
 use rand_core::SeedableRng;
+
+#[cfg(feature = "std")]
 use std::borrow::Borrow;
 
+#[cfg(not(feature = "std"))]
+use core::borrow::Borrow;
+
+#[cfg(not(feature = "std"))]
+extern crate alloc;
+
+#[cfg(not(feature = "std"))]
+use alloc::vec::Vec;
+
 type ParticipantCount = u32;
 
 fn nonces_seed<I>(

src/signature_share.rs

@@ -2,7 +2,7 @@
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
-use std::io;
+use crate::io;
 
 use reddsa::frost::redjubjub::round2::SignatureShare as FrostSignatureShare;
 

src/signing_commitment.rs

@@ -10,14 +10,20 @@ use crate::error::IronfishFrostError;
 use crate::frost::keys::SigningShare;
 use crate::frost::round1::NonceCommitment;
 use crate::frost::round1::SigningCommitments;
+use crate::io;
 use crate::nonces::deterministic_signing_nonces;
 use crate::participant::Identity;
 use crate::participant::Secret;
 use crate::participant::Signature;
 use crate::participant::IDENTITY_LEN;
-use std::borrow::Borrow;
-use std::hash::Hasher;
-use std::io;
+use core::borrow::Borrow;
+use core::hash::Hasher;
+
+#[cfg(not(feature = "std"))]
+extern crate alloc;
+
+#[cfg(not(feature = "std"))]
+use alloc::vec::Vec;
 
 const NONCE_COMMITMENT_LEN: usize = 32;
 pub const AUTHENTICATED_DATA_LEN: usize = IDENTITY_LEN + NONCE_COMMITMENT_LEN * 2 + CHECKSUM_LEN;