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

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

Part of #279.

tests/no-std/Cargo.toml

@@ -0,0 +1,33 @@
+[package]
+name = "serai-no-std"
+version = "0.1.0"
+description = "A crate to test no-std builds of Serai crates work"
+license = "MIT"
+repository = "https://github.com/kayabaNerve/serai/tree/develop/common/std-shims"
+authors = ["Luke Parker <lukeparker5132@gmail.com>"]
+keywords = ["nostd", "no_std", "alloc", "io"]
+edition = "2021"
+publish = false
+
+[package.metadata.docs.rs]
+all-features = true
+rustdoc-args = ["--cfg", "docsrs"]
+
+[dependencies]
+flexible-transcript = { path = "../../crypto/transcript", features = ["recommended", "merlin"] }
+
+dalek-ff-group = { path = "../../crypto/dalek-ff-group" }
+minimal-ed448 = { path = "../../crypto/ed448" }
+
+ciphersuite = { path = "../../crypto/ciphersuite", default-features = false, features = ["alloc", "secp256k1", "p256", "ed25519", "ristretto", "ed448"] }
+
+multiexp = { path = "../../crypto/multiexp", default-features = false, features = ["batch"] }
+
+# dleq = { path = "../../crypto/dleq" }
+schnorr-signatures = { path = "../../crypto/schnorr", default-features = false }
+
+# dkg = { path = "../../crypto/dkg" }
+# modular-frost = { path = "../../crypto/frost" }
+# frost-schnorrkel = { path = "../../crypto/schnorrkel" }
+
+monero-generators = { path = "../../coins/monero/generators", default-features = false, features = ["alloc"] }

tests/no-std/LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2023 Luke Parker
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

tests/no-std/README.md

@@ -0,0 +1,3 @@
+# no-std tests
+
+A crate usable to test building various Serai crates in a no-std environment.

tests/no-std/src/lib.rs

@@ -0,0 +1,26 @@
+#![no_std]
+
+pub use flexible_transcript::*;
+
+pub mod dalek {
+  pub use dalek_ff_group::*;
+}
+pub mod ed448 {
+  pub use minimal_ed448::*;
+}
+
+pub use ciphersuite::*;
+
+pub use multiexp::*;
+
+// pub use dleq::*;
+pub use schnorr_signatures::*;
+
+/*
+pub use dkg::*;
+pub use modular_frost::*;
+pub use frost_schnorrkel::*;
+*/
+
+pub use monero_generators::*;
+// pub use monero_serai::*;