Feature: Initial no_std Support for Crypto

[sephynox]

Summary

• Adds no_std support for the crypto crate
• Adds no_std support for the utils crate

[Copilot]

Pull request overview

Adds initial no_std compatibility knobs to the keetanetwork-crypto and keetanetwork-utils crates by introducing std feature flags, switching to alloc types, and adjusting dependency feature sets to support no_std builds.

Changes:

• Add #![no_std] under cfg_attr + alloc usage across keetanetwork-crypto modules.
• Introduce std feature defaults for keetanetwork-utils and keetanetwork-crypto, and adjust dependencies to default-features = false where needed.
• Update lockfile to reflect dependency feature/version resolution changes.

Reviewed changes

Copilot reviewed 18 out of 19 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
keetanetwork-utils/src/lib.rs	Adds no_std cfg gating at crate level.
keetanetwork-utils/Cargo.toml	Adds std feature + changes defaults; modifies [lib] configuration.
keetanetwork-crypto/src/lib.rs	Adds no_std gating and extern crate alloc for alloc-backed types/macros.
keetanetwork-crypto/src/utils.rs	Switches String/Vec imports to alloc equivalents.
keetanetwork-crypto/src/operations/signature.rs	Uses alloc::vec::Vec for no_std.
keetanetwork-crypto/src/operations/encryption.rs	Uses alloc::vec::Vec for no_std.
keetanetwork-crypto/src/kdf.rs	Uses alloc::vec::Vec for no_std.
keetanetwork-crypto/src/hash.rs	Uses alloc::vec::Vec for no_std.
keetanetwork-crypto/src/error.rs	Switches error strings to alloc::string::String.
keetanetwork-crypto/src/algorithms/mod.rs	Uses alloc::vec::Vec and adjusts signature encoding import for no_std.
keetanetwork-crypto/src/algorithms/secp256r1.rs	Uses alloc::vec::Vec for no_std.
keetanetwork-crypto/src/algorithms/secp256k1.rs	Uses alloc::vec::Vec for no_std.
keetanetwork-crypto/src/algorithms/ed25519.rs	Uses alloc::vec::Vec for no_std.
keetanetwork-crypto/src/algorithms/ecies.rs	Uses alloc::vec::Vec for no_std.
keetanetwork-crypto/src/algorithms/aes_gcm.rs	Uses alloc::vec::Vec for no_std.
keetanetwork-crypto/src/algorithms/aes_ctr.rs	Uses alloc::vec::Vec for no_std.
keetanetwork-crypto/src/algorithms/aes_cbc.rs	Uses alloc::vec::Vec for no_std.
keetanetwork-crypto/Cargo.toml	Reworks dependency features for no_std and introduces std/alloc features.
Cargo.lock	Updates resolved dependencies per feature/version changes.

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[Copilot]

snafu is specified here with an explicit version even though the workspace already defines snafu under [workspace.dependencies] (Cargo.toml:70-73) and other crates depend on it via snafu.workspace = true. Consider switching back to workspace = true and overriding default-features/features locally (e.g., default-features = false and enabling snafu/std via this crate’s std feature) to keep dependency versions centralized and consistent across the workspace.

Suggested change

	version = "0.8.7"
	workspace = true

[Copilot]

keetanetwork-utils is now no_std when std feature is disabled, but it still unconditionally compiles and exports pub mod testing;. testing.rs uses Box, String, and format!/std::..., which will fail to compile for downstream crates building keetanetwork-utils with default-features = false (e.g., keetanetwork-crypto in no_std mode). Gate the testing module behind feature = "std" (or a dedicated testing feature), or refactor it to use alloc + alloc::format! so the crate actually builds in no_std.

Suggested change

	pub mod errors;
	pub mod errors;
	#[cfg(feature = "std")]

[Copilot]

This PR removes the [lib].crate-type = ["staticlib", "rlib"] configuration. That changes the produced artifacts (no staticlib by default) and isn’t mentioned in the PR description about no_std support. If staticlib outputs are still required (consistent with other workspace crates like keetanetwork-account, keetanetwork-error, etc.), re-add crate-type or document why it’s safe to drop.

[Copilot]

This PR removes the [lib].crate-type = ["staticlib", "rlib"] configuration. That changes the produced artifacts (no staticlib by default) and isn’t mentioned in the PR description about no_std support. If staticlib outputs are still required/expected (most other workspace crates keep them), re-add crate-type or document why it’s safe to drop for keetanetwork-crypto.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud