add no-std support to ciphersuite crates

frost-core/Cargo.toml

@@ -32,7 +32,8 @@ postcard = { version = "1.0.0", features = ["alloc"], optional = true }
 rand_core = { version = "0.6", default-features = false }
 serde = { version = "1.0.160", default-features = false, features = ["derive"], optional = true }
 serdect = { version = "0.2.0", optional = true }
-thiserror = { version = "1.0", package = "thiserror-nostd-notrait", default-features = false }
+thiserror-nostd-notrait = { version = "1.0", default-features = false }
+thiserror = { version = "1.0", default-features = false, optional = true }
 visibility = "0.1.0"
 zeroize = { version = "1.5.4", default-features = false, features = ["derive"] }
 itertools = { version = "0.12.0", default-features = false }
@@ -50,8 +51,10 @@ rand_chacha = "0.3"
 serde_json = "1.0"
 
 [features]
-default = ["serialization", "cheater-detection"]
+default = ["serialization", "cheater-detection", "std"]
 #! ## Features
+## Enable standard library support.
+std = ["dep:thiserror"]
 ## Expose internal types, which do not have SemVer guarantees. This is an advanced
 ## feature which can be useful if you need to build a modified version of FROST.
 ## The docs won't list them, you will need to check the source code.

frost-core/src/error.rs

@@ -1,7 +1,11 @@
 //! FROST Error types
 
+#[cfg(feature = "std")]
 use thiserror::Error;
 
+#[cfg(not(feature = "std"))]
+use thiserror_nostd_notrait::Error;
+
 use crate::{Ciphersuite, Identifier};
 
 #[derive(Error, Debug, Clone, Copy, Eq, PartialEq)]

frost-core/src/lib.rs

@@ -1,4 +1,4 @@
-#![no_std]
+#![cfg_attr(not(feature = "std"), no_std)]
 #![allow(non_snake_case)]
 // It's emitting false positives; see https://github.com/rust-lang/rust-clippy/issues/9413
 #![allow(clippy::derive_partial_eq_without_eq)]

frost-core/src/tests/ciphersuite_generic.rs

@@ -328,6 +328,7 @@ fn check_aggregate_errors<C: Ciphersuite + PartialEq>(
     );
 }
 
+#[cfg(feature = "cheater-detection")]
 fn check_aggregate_corrupted_share<C: Ciphersuite + PartialEq>(
     signing_package: frost::SigningPackage<C>,
     mut signature_shares: BTreeMap<frost::Identifier<C>, frost::round2::SignatureShare<C>>,

frost-ed25519/Cargo.toml

@@ -25,8 +25,8 @@ rustdoc-args = ["--cfg", "docsrs"]
 [dependencies]
 curve25519-dalek = { version = "=4.1.2", features = ["rand_core"] }
 document-features = "0.2.7"
-frost-core = { path = "../frost-core", version = "1.0.0" }
-frost-rerandomized = { path = "../frost-rerandomized", version = "1.0.0" }
+frost-core = { path = "../frost-core", version = "1.0.0", default-features = false }
+frost-rerandomized = { path = "../frost-rerandomized", version = "1.0.0", default-features = false }
 rand_core = "0.6"
 sha2 = { version = "0.10.2", default-features = false }
 
@@ -45,15 +45,18 @@ serde_json = "1.0"
 
 [features]
 nightly = []
-default = ["serialization", "cheater-detection"]
-serialization = ["serde", "frost-core/serialization"]
+default = ["serialization", "cheater-detection", "std"]
 #! ## Features
+## Enable standard library support.
+std = ["frost-core/std"]
 ## Enable `serde` support for types that need to be communicated. You
 ## can use `serde` to serialize structs with any encoder that supports
 ## `serde` (e.g. JSON with `serde_json`).
 serde = ["frost-core/serde"]
+## Enable a default serialization format. Enables `serde`.
+serialization = ["serde", "frost-core/serialization", "frost-rerandomized/serialization"]
 ## Enable cheater detection
-cheater-detection = ["frost-core/cheater-detection"]
+cheater-detection = ["frost-core/cheater-detection", "frost-rerandomized/cheater-detection"]
 
 [lib]
 # Disables non-criterion benchmark which is not used; prevents errors

frost-ed25519/src/lib.rs

@@ -1,4 +1,4 @@
-#![no_std]
+#![cfg_attr(not(feature = "std"), no_std)]
 #![allow(non_snake_case)]
 #![deny(missing_docs)]
 #![cfg_attr(docsrs, feature(doc_auto_cfg))]
@@ -26,7 +26,9 @@ use frost_core as frost;
 mod tests;
 
 // Re-exports in our public API
-pub use frost_core::{serde, Ciphersuite, Field, FieldError, Group, GroupError};
+#[cfg(feature = "serde")]
+pub use frost_core::serde;
+pub use frost_core::{Ciphersuite, Field, FieldError, Group, GroupError};
 pub use rand_core;
 
 /// An error.

frost-ed448/Cargo.toml

@@ -24,8 +24,8 @@ rustdoc-args = ["--cfg", "docsrs"]
 [dependencies]
 document-features = "0.2.7"
 ed448-goldilocks = { version = "0.9.0" }
-frost-core = { path = "../frost-core", version = "1.0.0" }
-frost-rerandomized = { path = "../frost-rerandomized", version = "1.0.0" }
+frost-core = { path = "../frost-core", version = "1.0.0", default-features = false }
+frost-rerandomized = { path = "../frost-rerandomized", version = "1.0.0", default-features = false }
 rand_core = "0.6"
 sha3 = { version = "0.10.6", default-features = false }
 
@@ -43,15 +43,18 @@ serde_json = "1.0"
 
 [features]
 nightly = []
-default = ["serialization", "cheater-detection"]
-serialization = ["serde", "frost-core/serialization"]
+default = ["serialization", "cheater-detection", "std"]
 #! ## Features
+## Enable standard library support.
+std = ["frost-core/std"]
 ## Enable `serde` support for types that need to be communicated. You
 ## can use `serde` to serialize structs with any encoder that supports
 ## `serde` (e.g. JSON with `serde_json`).
 serde = ["frost-core/serde"]
+## Enable a default serialization format. Enables `serde`.
+serialization = ["serde", "frost-core/serialization", "frost-rerandomized/serialization"]
 ## Enable cheater detection
-cheater-detection = ["frost-core/cheater-detection"]
+cheater-detection = ["frost-core/cheater-detection", "frost-rerandomized/cheater-detection"]
 
 [lib]
 # Disables non-criterion benchmark which is not used; prevents errors

frost-ed448/src/lib.rs

@@ -26,7 +26,9 @@ use frost_core as frost;
 mod tests;
 
 // Re-exports in our public API
-pub use frost_core::{serde, Ciphersuite, Field, FieldError, Group, GroupError};
+#[cfg(feature = "serde")]
+pub use frost_core::serde;
+pub use frost_core::{Ciphersuite, Field, FieldError, Group, GroupError};
 pub use rand_core;
 
 /// An error.

frost-p256/Cargo.toml

@@ -25,8 +25,8 @@ rustdoc-args = ["--cfg", "docsrs"]
 [dependencies]
 document-features = "0.2.7"
 p256 = { version = "0.13.0", features = ["hash2curve"], default-features = false }
-frost-core = { path = "../frost-core", version = "1.0.0" }
-frost-rerandomized = { path = "../frost-rerandomized", version = "1.0.0" }
+frost-core = { path = "../frost-core", version = "1.0.0", default-features = false }
+frost-rerandomized = { path = "../frost-rerandomized", version = "1.0.0", default-features = false }
 rand_core = "0.6"
 sha2 = { version = "0.10.2", default-features = false }
 
@@ -44,15 +44,18 @@ serde_json = "1.0"
 
 [features]
 nightly = []
-default = ["serialization", "cheater-detection"]
-serialization = ["serde", "frost-core/serialization"]
+default = ["serialization", "cheater-detection", "std"]
 #! ## Features
+## Enable standard library support.
+std = ["frost-core/std"]
 ## Enable `serde` support for types that need to be communicated. You
 ## can use `serde` to serialize structs with any encoder that supports
 ## `serde` (e.g. JSON with `serde_json`).
 serde = ["frost-core/serde"]
+## Enable a default serialization format. Enables `serde`.
+serialization = ["serde", "frost-core/serialization", "frost-rerandomized/serialization"]
 ## Enable cheater detection
-cheater-detection = ["frost-core/cheater-detection"]
+cheater-detection = ["frost-core/cheater-detection", "frost-rerandomized/cheater-detection"]
 
 [lib]
 # Disables non-criterion benchmark which is not used; prevents errors

frost-p256/src/lib.rs

@@ -1,4 +1,4 @@
-#![no_std]
+#![cfg_attr(not(feature = "std"), no_std)]
 #![allow(non_snake_case)]
 #![deny(missing_docs)]
 #![cfg_attr(docsrs, feature(doc_auto_cfg))]
@@ -29,7 +29,9 @@ use frost_core as frost;
 mod tests;
 
 // Re-exports in our public API
-pub use frost_core::{serde, Ciphersuite, Field, FieldError, Group, GroupError};
+#[cfg(feature = "serde")]
+pub use frost_core::serde;
+pub use frost_core::{Ciphersuite, Field, FieldError, Group, GroupError};
 pub use rand_core;
 
 /// An error.

frost-rerandomized/Cargo.toml

@@ -6,8 +6,11 @@ edition = "2021"
 # - Update CHANGELOG.md
 # - Create git tag.
 version = "1.0.0"
-authors = ["Deirdre Connolly <durumcrustulum@gmail.com>", "Chelsea Komlo <me@chelseakomlo.com>",
-    "Conrado Gouvea <conradoplg@gmail.com>"]
+authors = [
+    "Deirdre Connolly <durumcrustulum@gmail.com>",
+    "Chelsea Komlo <me@chelseakomlo.com>",
+    "Conrado Gouvea <conradoplg@gmail.com>",
+]
 readme = "README.md"
 license = "MIT OR Apache-2.0"
 repository = "https://github.com/ZcashFoundation/frost"
@@ -22,7 +25,9 @@ rustdoc-args = ["--cfg", "docsrs"]
 [dependencies]
 derive-getters = "0.3.0"
 document-features = "0.2.7"
-frost-core = { path = "../frost-core", version = "1.0.0", features = ["internals"] }
+frost-core = { path = "../frost-core", version = "1.0.0", features = [
+    "internals",
+], default-features = false }
 rand_core = "0.6"
 
 [dev-dependencies]
@@ -32,11 +37,13 @@ nightly = []
 default = ["serialization", "cheater-detection"]
 serialization = ["serde", "frost-core/serialization"]
 #! ## Features
+## Enable standard library support.
+std = ["frost-core/std"]
 ## Enable `serde` support for types that need to be communicated. You
 ## can use `serde` to serialize structs with any encoder that supports
 ## `serde` (e.g. JSON with `serde_json`).
 serde = ["frost-core/serde"]
 # Exposes ciphersuite-generic tests for other crates to use
-test-impl = ["frost-core/test-impl"]
+test-impl = ["frost-core/test-impl", "serialization"]
 ## Enable cheater detection
 cheater-detection = ["frost-core/cheater-detection"]

frost-rerandomized/src/lib.rs

@@ -9,7 +9,7 @@
 //! - Each participant should call [`sign`] and send the resulting
 //!   [`frost::round2::SignatureShare`] back to the Coordinator;
 //! - The Coordinator should then call [`aggregate`].
-#![no_std]
+#![cfg_attr(not(feature = "std"), no_std)]
 #![allow(non_snake_case)]
 
 extern crate alloc;
@@ -22,10 +22,12 @@ use alloc::collections::BTreeMap;
 use derive_getters::Getters;
 pub use frost_core;
 
+#[cfg(feature = "serialization")]
+use frost_core::SigningPackage;
 use frost_core::{
     self as frost,
     keys::{KeyPackage, PublicKeyPackage, SigningShare, VerifyingShare},
-    Ciphersuite, Error, Field, Group, Scalar, SigningPackage, VerifyingKey,
+    Ciphersuite, Error, Field, Group, Scalar, VerifyingKey,
 };
 
 #[cfg(feature = "serde")]
@@ -35,6 +37,7 @@ use frost_core::serialization::ScalarSerialization;
 
 // When pulled into `reddsa`, that has its own sibling `rand_core` import.
 // For the time being, we do not re-export this `rand_core`.
+#[cfg(feature = "serialization")]
 use rand_core::{CryptoRng, RngCore};
 
 /// Randomize the given key type for usage in a FROST signing with re-randomized keys,
@@ -172,6 +175,7 @@ where
     /// The [`SigningPackage`] must be the signing package being used in the
     /// current FROST signing run. It is hashed into the randomizer calculation,
     /// which binds it to that specific package.
+    #[cfg(feature = "serialization")]
     pub fn new<R: RngCore + CryptoRng>(
         mut rng: R,
         signing_package: &SigningPackage<C>,
@@ -182,6 +186,7 @@ where
 
     /// Create a final Randomizer from a random Randomizer and a SigningPackage.
     /// Function refactored out for testing, should always be private.
+    #[cfg(feature = "serialization")]
     fn from_randomizer_and_signing_package(
         rng_randomizer: <<<C as Ciphersuite>::Group as Group>::Field as Field>::Scalar,
         signing_package: &SigningPackage<C>,
@@ -269,6 +274,7 @@ where
 {
     /// Create a new [`RandomizedParams`] for the given [`VerifyingKey`] and
     /// the given `participants`.
+    #[cfg(feature = "serialization")]
     pub fn new<R: RngCore + CryptoRng>(
         group_verifying_key: &VerifyingKey<C>,
         signing_package: &SigningPackage<C>,

frost-ristretto255/Cargo.toml

@@ -19,10 +19,10 @@ features = ["serde"]
 rustdoc-args = ["--cfg", "docsrs"]
 
 [dependencies]
-curve25519-dalek = { version = "=4.1.2", features = ["serde", "rand_core"] }
+curve25519-dalek = { version = "=4.1.2", features = ["rand_core"] }
 document-features = "0.2.7"
-frost-core = { path = "../frost-core", version = "1.0.0" }
-frost-rerandomized = { path = "../frost-rerandomized", version = "1.0.0" }
+frost-core = { path = "../frost-core", version = "1.0.0", default-features = false }
+frost-rerandomized = { path = "../frost-rerandomized", version = "1.0.0", default-features = false }
 rand_core = "0.6"
 sha2 = { version = "0.10.2", default-features = false }
 
@@ -41,15 +41,18 @@ serde_json = "1.0"
 
 [features]
 nightly = []
-default = ["serialization", "cheater-detection"]
-serialization = ["serde", "frost-core/serialization"]
+default = ["serialization", "cheater-detection", "std"]
 #! ## Features
+## Enable standard library support.
+std = ["frost-core/std"]
 ## Enable `serde` support for types that need to be communicated. You
 ## can use `serde` to serialize structs with any encoder that supports
 ## `serde` (e.g. JSON with `serde_json`).
-serde = ["frost-core/serde"]
+serde = ["frost-core/serde", "curve25519-dalek/serde"]
+## Enable a default serialization format. Enables `serde`.
+serialization = ["serde", "frost-core/serialization", "frost-rerandomized/serialization"]
 ## Enable cheater detection
-cheater-detection = ["frost-core/cheater-detection"]
+cheater-detection = ["frost-core/cheater-detection", "frost-rerandomized/cheater-detection"]
 
 [lib]
 # Disables non-criterion benchmark which is not used; prevents errors

frost-ristretto255/src/lib.rs

@@ -1,4 +1,4 @@
-#![no_std]
+#![cfg_attr(not(feature = "std"), no_std)]
 #![allow(non_snake_case)]
 #![deny(missing_docs)]
 #![doc = include_str!("../README.md")]
@@ -23,7 +23,9 @@ use frost_core as frost;
 mod tests;
 
 // Re-exports in our public API
-pub use frost_core::{serde, Ciphersuite, Field, FieldError, Group, GroupError};
+#[cfg(feature = "serde")]
+pub use frost_core::serde;
+pub use frost_core::{Ciphersuite, Field, FieldError, Group, GroupError};
 pub use rand_core;
 
 /// An error.

frost-secp256k1/Cargo.toml

@@ -23,8 +23,8 @@ rustdoc-args = ["--cfg", "docsrs"]
 
 [dependencies]
 document-features = "0.2.7"
-frost-core = { path = "../frost-core", version = "1.0.0" }
-frost-rerandomized = { path = "../frost-rerandomized", version = "1.0.0" }
+frost-core = { path = "../frost-core", version = "1.0.0", default-features = false }
+frost-rerandomized = { path = "../frost-rerandomized", version = "1.0.0", default-features = false }
 k256 = { version = "0.13.0", features = ["arithmetic", "expose-field", "hash2curve"], default-features = false }
 rand_core = "0.6"
 sha2 = { version = "0.10.2", default-features = false }
@@ -43,15 +43,18 @@ serde_json = "1.0"
 
 [features]
 nightly = []
-default = ["serialization", "cheater-detection"]
-serialization = ["serde", "frost-core/serialization"]
+default = ["serialization", "cheater-detection", "std"]
 #! ## Features
+## Enable standard library support.
+std = ["frost-core/std"]
 ## Enable `serde` support for types that need to be communicated. You
 ## can use `serde` to serialize structs with any encoder that supports
 ## `serde` (e.g. JSON with `serde_json`).
 serde = ["frost-core/serde"]
+## Enable a default serialization format. Enables `serde`.
+serialization = ["serde", "frost-core/serialization", "frost-rerandomized/serialization"]
 ## Enable cheater detection
-cheater-detection = ["frost-core/cheater-detection"]
+cheater-detection = ["frost-core/cheater-detection", "frost-rerandomized/cheater-detection"]
 
 [lib]
 # Disables non-criterion benchmark which is not used; prevents errors

frost-secp256k1/src/lib.rs

@@ -1,4 +1,4 @@
-#![no_std]
+#![cfg_attr(not(feature = "std"), no_std)]
 #![allow(non_snake_case)]
 #![deny(missing_docs)]
 #![cfg_attr(docsrs, feature(doc_auto_cfg))]
@@ -30,7 +30,9 @@ use frost_core as frost;
 mod tests;
 
 // Re-exports in our public API
-pub use frost_core::{serde, Ciphersuite, Field, FieldError, Group, GroupError};
+#[cfg(feature = "serde")]
+pub use frost_core::serde;
+pub use frost_core::{Ciphersuite, Field, FieldError, Group, GroupError};
 pub use rand_core;
 
 /// An error.