ash-core

Developed by 3maem Co. | شركة عمائم

ASH (Application Security Hash) Core - Request integrity and anti-replay protection library for Rust.

Features

Tamper Detection: Cryptographic proof ensures payload integrity
Replay Prevention: One-time contexts prevent request replay
Deterministic: Byte-identical output across all platforms
WASM Compatible: Works in browsers and server environments

Installation

cargo add ash-core

Quick Start

use ash_core::{canonicalize_json, build_proof, verify_proof, AshMode, VerifyInput};

// Canonicalize a JSON payload
let canonical = canonicalize_json(r#"{"z":1,"a":2}"#).unwrap();
assert_eq!(canonical, r#"{"a":2,"z":1}"#);

// Build a proof
let proof = build_proof(
    AshMode::Balanced,
    "POST /api/update",
    "context-id-123",
    None,
    &canonical,
).unwrap();

// Verify a proof
let expected = proof.clone();
let input = VerifyInput::new(&expected, &proof);
assert!(verify_proof(&input));

API

Canonicalization

canonicalize_json(input: &str) - Canonicalize JSON to deterministic form
canonicalize_urlencoded(input: &str) - Canonicalize URL-encoded form data

Proof Generation

build_proof(mode, binding, context_id, nonce, payload) - Generate cryptographic proof
verify_proof(input: &VerifyInput) - Verify proof matches expected value

Utilities

normalize_binding(method, path) - Normalize HTTP method and path
timing_safe_equal(a, b) - Constant-time byte comparison

Types

AshMode - Security mode: Minimal, Balanced, Strict
AshError - Error type with code and message
BuildProofInput - Structured input for proof building
VerifyInput - Input for proof verification

Security Notes

ASH verifies what is being submitted, not who is submitting it. It should be used alongside authentication systems (JWT, OAuth, etc.).

License

ASH Source-Available License (ASAL-1.0)

See LICENSE for full terms.

ash-core 2.3.0