JarCastingblake2b-wasm
Blake2b implemented in WASM
npm install blake2b-wasm
Works in browsers that support WASM and Node.js 8+.
Usage
var blake2b = require('blake2b-wasm')
if (!blake2b.SUPPORTED) {
console.log('WebAssembly not supported by your runtime')
}
blake2b.ready(function (err) {
if (err) throw err
var hash = blake2b()
.update(Buffer.from('hello')) // pass in a buffer or uint8array
.update(Buffer.from(' '))
.update(Buffer.from('world'))
.digest('hex')
console.log('Blake2b hash of "hello world" is %s', hash)
})
API
var hash = blake2b([digestLength], [key], [salt], [personal])
Create a new hash instance. digestLength defaults to 32.
hash.update(data)
Update the hash with a new piece of data. data should be a buffer or uint8array.
var digest = hash.digest([enc])
Digest the hash.
var promise = blake2b.ready([cb])
Wait for the WASM code to load. Returns the WebAssembly instance promise as well for convenience. You have to call this at least once before instantiating the hash.
Browser demo
There is a browser example included in example.html and example.js.
Contributing
The bulk of this module is implemented in WebAssembly in the blake2b.wat file. The format of this file is S-Expressions that can be compiled to their binary WASM representation by doing
wat2wasm blake2b.wat -o blake2b.wasm
To build the thin Javascript wrapper for the WASM module use wat2js:
# also available as `npm run compile`
wat2js blake2b.wat -o blake2b.js
If you do not have wat2wasm installed follow the instructions here, https://github.com/WebAssembly/wabt
License
MIT