sha384-wasm

Usage

const sha384 = require('sha384-wasm')

if (!Sha384.SUPPORTED) {
  console.log('WebAssembly not supported by your runtime')
}

var hash = sha384()
  .update('hello')
  .update(' ')
  .update(Buffer.from('world'))
  .digest('hex')

console.log('Sha384 hash of "hello world" is ', hash)
// fdbd8e75a67f29f701a4e040385e2e23986303ea10239211af907fcbb83578b3e417cb71ce646efd0819dd8c088de1bd

API

const hash = sha384()

Create a new hash instance.

hash.update(data, [enc])

Update the hash with a new piece of data. data may be passed as a buffer, uint8array or a string. If data is passed as a string, then it will be interpreted as a utf8 string unless enc specifies an encoding.

hash.digest([enc])

Digest the hash. If enc is specified, then the digest shall be returned as an enc encoded string. Otherwise a buffer is returned.

var promise = sha384.ready([cb])

Option to wait for the WASM code to load. Returns the WebAssembly instance promise as well for convenience.

Contributing

The bulk of this module is implemented in WebAssembly in the sha384.wat file. The format of this file is S-Expressions that can be compiled to their binary WASM representation by doing

wat2wasm sha384.wat -o sha384.wasm

To build the thin Javascript wrapper for the WASM module use wat2js:

# also available as `npm run compile`
wat2js sha384.wat -o sha384.js

If you do not have wat2wasm installed follow the instructions here, https://github.com/WebAssembly/wabt

License

MIT