45 lines
1.7 KiB
Markdown
45 lines
1.7 KiB
Markdown
# sha.js
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[](https://www.npmjs.org/package/sha.js)
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[](https://travis-ci.org/crypto-browserify/sha.js)
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[](https://david-dm.org/crypto-browserify/sha.js#info=dependencies)
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[](https://github.com/feross/standard)
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Node style `SHA` on pure JavaScript.
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```js
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var shajs = require('sha.js')
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console.log(shajs('sha256').update('42').digest('hex'))
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// => 73475cb40a568e8da8a045ced110137e159f890ac4da883b6b17dc651b3a8049
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console.log(new shajs.sha256().update('42').digest('hex'))
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// => 73475cb40a568e8da8a045ced110137e159f890ac4da883b6b17dc651b3a8049
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var sha256stream = shajs('sha256')
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sha256stream.end('42')
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console.log(sha256stream.read().toString('hex'))
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// => 73475cb40a568e8da8a045ced110137e159f890ac4da883b6b17dc651b3a8049
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```
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## supported hashes
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`sha.js` currently implements:
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- SHA (SHA-0) -- **legacy, do not use in new systems**
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- SHA-1 -- **legacy, do not use in new systems**
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- SHA-224
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- SHA-256
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- SHA-384
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- SHA-512
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## Not an actual stream
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Note, this doesn't actually implement a stream, but wrapping this in a stream is trivial.
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It does update incrementally, so you can hash things larger than RAM, as it uses a constant amount of memory (except when using base64 or utf8 encoding, see code comments).
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## Acknowledgements
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This work is derived from Paul Johnston's [A JavaScript implementation of the Secure Hash Algorithm](http://pajhome.org.uk/crypt/md5/sha1.html).
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## LICENSE [MIT](LICENSE)
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