RSA for WebAssembly

WebAssembly port of RustCrypto’s RSA, a Rust implementation of RSA encryption and signatures.

npm i @hazae41/paimon

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Usage

import { Paimon, PaddingScheme, RsaPrivateKey } from "@hazae41/paimon";

// Wait for WASM to load
Paimon.initSyncBundledOnce()

// Generate an identity
const keypair = new RsaPrivateKey(1024)
const identity = keypair.to_public_key()

// Define bytes to sign and padding to use
const bytes = new TextEncoder().encode("hello world")
const padding = PaddingScheme.new_pkcs1v15_sign_raw()

// Sign and verify
const proof = keypair.sign(padding, bytes)
const verified = identity.verify(padding, bytes, proof)

Unreproducible building

You need to install Rust

Then, install wasm-pack

cargo install wasm-pack

Finally, do a clean install and build

npm ci && npm run build

Reproducible building

You can build the exact same bytecode using Docker, just be sure you’re on a linux/amd64 host

docker compose up --build

Then check that all the files are the same using git status

git status --porcelain

If the output is empty then the bytecode is the same as the one I commited

Automated checks

Each time I commit to the repository, the GitHub’s CI does the following:

• Clone the repository
• Reproduce the build using docker compose up --build
• Throw an error if the git status --porcelain output is not empty