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sha.js

Streamable SHA hashes in pure javascript.

Example

var createHash = require('sha.js')

var sha256 = createHash('sha256')
var sha512 = createHash('sha512')

var h = sha256.update('abc', 'utf8').digest('hex')
console.log(h) //ba7816bf8f01cfea414140de5dae2223b00361a396177a9cb410ff61f20015ad

//LEGACY, do not use in new systems:
var sha0 = createHash('sha')
var sha1 = createHash('sha1')

supported hashes

sha.js currently implements:

sha256
sha512
sha1 (legacy, no not use in new systems)
sha (legacy, no not use in new systems)

Note

Note, this doesn't actually implement a stream, but wrapping this in a stream is trivial. but is does update incrementally, so you can hash things larger than ram, and also, since it reuses the typedarrays, it uses a constant amount of memory (except when using base64 or utf8 encoding, see code comments)

Acknowledgements

This work is derived from Paul Johnston's "A JavaScript implementation of the Secure Hash Algorithm"

License

MIT