chacha-poly-wasm-web

Usage

import instantiate, { XChaCha20Poly1305 } from 'chacha-poly-wasm-web'

const encrypt = async (secret: Uint8Array, nonce: Uint8Array, data: Uint8Array): Promise<Uint8Array | null> => {
  if (typeof WebAssembly !== 'undefined') {
    let xchacha20: XChaCha20Poly1305 | null = null
    try {
      await instantiate()
      xchacha20 = new XChaCha20Poly1305(secret, nonce)
      return xchacha20.encrypt(data)
    } catch (err) {
      console.error(err)
    } finally {
      if (xchacha20) {
        xchacha20.free()
      }
    }
  }
  return null
}

const decrypt = async (secret: Uint8Array, nonce: Uint8Array, encrypted_data: Uint8Array): Promise<Uint8Array | null> => {
  if (typeof WebAssembly !== 'undefined') {
    let xchacha20: XChaCha20Poly1305 | null = null
    try {
      await instantiate()
      xchacha20 = new XChaCha20Poly1305(secret, nonce)
      return xchacha20.decrypt(encrypted_data)
    } catch (err) {
      console.error(err)
    } finally {
      if (xchacha20) {
        xchacha20.free()
      }
    }
  }
  return null
}