Crate signed_crypto 

signed-crypto

A Rust library for encrypted payloads with built-in integrity verification.

Package Format

Encrypted payloads follow this structure:

initVector:16 || E(payload:?) || I(signature:4)

where:

• initVector = timestamp:8 || serverId:8
• E(payload) = AES-256/CTR64 encryption with encryption key
• I(signature) = First 4 bytes of HMAC-SHA256(integrityKey, payload || initVector)

Example

use signed_crypto::{Crypto, Keys};

let keys = Keys::new(&[0u8; 32], &[0u8; 32])?;
let crypto = Crypto::new(keys);

// Encrypt
let payload = b"Hello, world!";
let mut pkg = crypto.init_plain_data(payload.len(), None)?;
crypto.set_payload(&mut pkg, payload)?;
let encrypted = crypto.encrypt(&pkg)?;

// Decrypt
let decrypted = crypto.decrypt(&encrypted)?;
assert_eq!(crypto.payload(&decrypted), Some(payload.as_slice()));

Structs

Crypto

Main cryptographic operations instance.

Keys

Holds the encryption and integrity keys.

Enums

CryptoError

Errors that can occur during cryptographic operations.