Feature: Initial no_std Support for Crypto

Makefile

@@ -59,11 +59,16 @@ do-lint-ci:
 
 # Test crate packages features
 test-feat:
-	cargo test -p keetanetwork-crypto --no-default-features --features signature
-	cargo test -p keetanetwork-crypto --no-default-features --features encryption
-	cargo test -p keetanetwork-crypto --no-default-features --features der
+	cargo test -p keetanetwork-crypto --no-default-features --features std,signature
+	cargo test -p keetanetwork-crypto --no-default-features --features std,encryption
+	cargo test -p keetanetwork-crypto --no-default-features --features std,der
 	cargo test -p keetanetwork-account --no-default-features --features der
 	cargo test -p keetanetwork-account --no-default-features --features rasn
+	cargo test -p keetanetwork-crypto --no-default-features --features std
+	cargo check -p keetanetwork-crypto --no-default-features
+	cargo check -p keetanetwork-crypto --no-default-features --features signature
+	cargo check -p keetanetwork-crypto --no-default-features --features encryption
+	cargo check -p keetanetwork-crypto --no-default-features --features signature,encryption,rasn
 	cargo test -p keetanetwork-x509 --no-default-features --features der
 	cargo test -p keetanetwork-x509 --no-default-features --features rasn
 	cargo test -p keetanetwork-x509 --no-default-features --features der, serde
@@ -73,7 +78,6 @@ test-feat:
 	cargo test -p keetanetwork-asn1 --no-default-features --features der,serde
 	cargo test -p keetanetwork-asn1 --no-default-features --features rasn,serde
 	cargo test -p keetanetwork-crypto -p keetanetwork-x509 --all-features
-	cargo test -p keetanetwork-crypto --no-default-features
 
 # Run tests with host system's default target
 test:

keetanetwork-account/Cargo.toml

@@ -9,7 +9,6 @@ homepage.workspace = true
 description = "Account management and cryptographic identities for Keetanetwork"
 
 [lib]
-crate-type = ["staticlib", "rlib"]
 path = "src/lib.rs"
 
 [dependencies]

keetanetwork-asn1/Cargo.toml

@@ -9,7 +9,6 @@ homepage.workspace = true
 description = "ASN.1 definitions and utilities for Keetanetwork"
 
 [lib]
-crate-type = ["staticlib", "rlib"]
 path = "src/lib.rs"
 
 [dependencies.spki]

keetanetwork-asn1/src/generated.rs

@@ -19,6 +19,5 @@ mod subject_public_key_info_definitions {
 }
 
 // Re-export all types from the generated modules
-pub use algorithm_identifier_definitions::{AlgorithmIdentifier};
-pub use subject_public_key_info_definitions::{SubjectPublicKeyInfo};
-
+pub use algorithm_identifier_definitions::AlgorithmIdentifier;
+pub use subject_public_key_info_definitions::SubjectPublicKeyInfo;

keetanetwork-crypto/Cargo.toml

@@ -9,61 +9,68 @@ homepage.workspace = true
 description = "Cryptographic primitives and operations for Keetanetwork"
 
 [lib]
-crate-type = ["staticlib", "rlib"]
 path = "src/lib.rs"
 
 [dependencies]
 # Cryptographic libraries
 [dependencies.k256]
 version = "0.13.2"
-features = ["ecdsa", "ecdh"]
+default-features = false
+features = ["ecdsa", "ecdh", "alloc"]
 
 [dependencies.p256]
 version = "0.13.2"
-features = ["ecdsa", "ecdh"]
+default-features = false
+features = ["ecdsa", "ecdh", "alloc"]
 
 [dependencies.ed25519-dalek]
 version = "2.0"
-features = ["std", "rand_core", "zeroize"]
+default-features = false
+features = ["rand_core", "zeroize"]
 
 [dependencies.x25519-dalek]
 version = "2.0"
+default-features = false
 features = ["zeroize"]
 
 [dependencies.curve25519-dalek]
 version = "4.1.3"
+default-features = false
 features = ["zeroize"]
 
 [dependencies.hkdf]
 version = "0.12.4"
-features = ["std"]
+default-features = false
 
 [dependencies.pbkdf2]
 version = "0.12.2"
-features = ["hmac", "parallel", "sha2", "std"]
+default-features = false
+features = ["hmac", "sha2"]
 
 [dependencies.sha1]
 version = "0.10.6"
-features = ["asm"]
+default-features = false
 
 [dependencies.sha2]
 version = "0.10.9"
-features = ["asm", "asm-aarch64", "sha2-asm"]
+default-features = false
 
 [dependencies.sha3]
 version = "0.10.8"
-features = ["asm"]
+default-features = false
 
 [dependencies.zeroize]
 version = "1.8.1"
 features = ["derive"]
 
 [dependencies.rand_core]
 version = "0.9.3"
-features = ["std", "os_rng"]
+default-features = false
+features = ["os_rng"]
 
 [dependencies.snafu]
 workspace = true
+default-features = false
 
 # RustCrypto trait crates
 [dependencies.signature]
@@ -107,18 +114,22 @@ optional = true
 
 [dependencies.aes-gcm]
 version = "0.10.3"
-features = ["std"]
+default-features = false
+features = ["alloc", "aes", "getrandom"]
 
 # Utilities
 [dependencies.bip39-dict]
 version = "0.1.3"
 
 [dependencies.crypto-bigint]
 version = "0.6.1"
+default-features = false
 features = ["serde", "der", "zeroize"]
 
 [dependencies.strum]
-workspace = true
+version = "0.27.2"
+default-features = false
+features = ["derive"]
 
 [dependencies.strum_macros]
 workspace = true
@@ -135,7 +146,9 @@ workspace = true
 version = "0.22"
 
 [dependencies.hex]
-workspace = true
+version = "0.4.3"
+default-features = false
+features = ["serde", "alloc"]
 
 [dependencies.chrono]
 workspace = true
@@ -145,6 +158,7 @@ optional = true
 [dependencies.keetanetwork-error]
 version = "0.1.0"
 path = "../keetanetwork-error"
+optional = true
 
 [dependencies.keetanetwork-asn1]
 version = "0.1.0"
@@ -154,9 +168,34 @@ optional = true
 [dependencies.keetanetwork-utils]
 version = "0.1.0"
 path = "../keetanetwork-utils"
+default-features = false
 
 [features]
-default = ["signature", "encryption", "rasn"]
+default = ["std", "signature", "encryption", "rasn"]
+std = [
+	"alloc",
+	"snafu/std",
+	"ed25519-dalek/std",
+	"hkdf/std",
+	"pbkdf2/std",
+	"pbkdf2/parallel",
+	"rand_core/std",
+	"aes-gcm/std",
+	"strum/std",
+	"hex/std",
+	"sha1/asm",
+	"sha2/asm",
+	"sha2/asm-aarch64",
+	"sha2/sha2-asm",
+	"sha3/asm",
+	"dep:chrono",
+	"dep:keetanetwork-error",
+	"keetanetwork-utils/std",
+	"signature?/std",
+	"aead?/std",
+	"rand?/std",
+]
+alloc = []
 signature = ["dep:signature"]
 encryption = [
 	"dep:aead",

keetanetwork-crypto/src/algorithms/aes_cbc.rs

@@ -2,6 +2,8 @@
 //!
 //! This module provides AES-CBC encryption.
 
+use alloc::vec::Vec;
+
 use aes::Aes256;
 use cbc::cipher::{block_padding::Pkcs7, BlockDecryptMut, BlockEncryptMut, KeyIvInit};
 use cbc::{Decryptor, Encryptor};

keetanetwork-crypto/src/algorithms/aes_ctr.rs

@@ -2,6 +2,8 @@
 //!
 //! This module provides AES-CTR symmetric encryption.
 
+use alloc::vec::Vec;
+
 use aes::Aes128;
 use ctr::cipher::{KeyIvInit, StreamCipher};
 use ctr::Ctr128BE;

keetanetwork-crypto/src/algorithms/aes_gcm.rs

@@ -2,6 +2,8 @@
 //!
 //! This module provides AES-GCM AEAD.
 
+use alloc::vec::Vec;
+
 use aes_gcm::aead::{Aead, AeadCore, KeyInit, OsRng};
 use aes_gcm::{Aes256Gcm as AesGcmCipher, Key};
 

keetanetwork-crypto/src/algorithms/ecies.rs

@@ -2,6 +2,8 @@
 //!
 //! This module provides ECIES encryption.
 
+use alloc::vec::Vec;
+
 use core::sync::atomic::{fence, Ordering};
 
 use hmac::{Hmac, Mac};

keetanetwork-crypto/src/algorithms/ed25519.rs

@@ -27,6 +27,8 @@
 // Re-export algorithm-specific signature types
 pub use ed25519_dalek::Signature as Ed25519Signature;
 
+use alloc::vec::Vec;
+
 use core::fmt::{Debug, Formatter, Result as FmtResult};
 use core::sync::atomic::{fence, Ordering};
 
@@ -612,6 +614,7 @@ impl KeyDerivation for Ed25519Derivation {
 
 #[cfg(test)]
 mod tests {
+	extern crate std;
 	use std::collections::HashMap;
 
 	use super::*;

keetanetwork-crypto/src/algorithms/mod.rs

@@ -1,3 +1,5 @@
+use alloc::vec::Vec;
+
 use core::fmt::Debug;
 
 use secrecy::SecretBox;
@@ -193,6 +195,8 @@ macro_rules! impl_any_signature {
 
 		impl $any_signature_type {
 			pub fn to_bytes(&self) -> Vec<u8> {
+				#[allow(unused_imports)]
+				use ::signature::SignatureEncoding;
 				match self {
 					$(
 						$any_signature_type::$variant(sig) => sig.to_vec(),

keetanetwork-crypto/src/algorithms/secp256k1.rs

@@ -10,6 +10,8 @@
 // Re-export algorithm-specific signature types
 pub use k256::ecdsa::Signature as Secp256k1Signature;
 
+use alloc::vec::Vec;
+
 use core::fmt::{Debug, Formatter, Result as FmtResult};
 
 use k256::ecdsa::{Signature, SigningKey};

keetanetwork-crypto/src/algorithms/secp256r1.rs

@@ -10,6 +10,8 @@
 // Re-export algorithm-specific signature types
 pub use p256::ecdsa::Signature as Secp256r1Signature;
 
+use alloc::vec::Vec;
+
 use core::fmt::{Debug, Formatter, Result as FmtResult};
 
 use p256::ecdsa::{Signature, SigningKey};

keetanetwork-crypto/src/error.rs

@@ -1,3 +1,7 @@
+use alloc::string::String;
+#[cfg(all(not(feature = "std"), feature = "encryption"))]
+use alloc::string::ToString;
+
 use keetanetwork_utils::impl_variant_error_from;
 use snafu::Snafu;
 

keetanetwork-crypto/src/hash.rs

@@ -2,6 +2,8 @@
 //!
 //! This module provides a flexible abstraction over different hash algorithms.
 
+use alloc::vec::Vec;
+
 use sha1::Sha1;
 use sha2::{Sha256, Sha512};
 use sha3::{Digest, Sha3_256};

keetanetwork-crypto/src/kdf.rs

@@ -3,6 +3,8 @@
 //! This module provides abstractions over different key derivation functions
 //! used for expanding key material and deriving cryptographic keys.
 
+use alloc::vec::Vec;
+
 use hkdf::Hkdf;
 use sha2::{Sha256, Sha512};
 use sha3::Sha3_256;