55 lines
1.3 KiB
Markdown
55 lines
1.3 KiB
Markdown
# sha.js
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Streamable SHA hashes in pure javascript.
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[](http://travis-ci.org/crypto-browserify/sha.js)
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[](https://www.npmjs.org/package/sha.js)
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## Example
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``` js
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var createHash = require('sha.js')
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var sha256 = createHash('sha256')
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var sha512 = createHash('sha512')
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var h = sha256.update('abc', 'utf8').digest('hex')
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console.log(h) //ba7816bf8f01cfea414140de5dae2223b00361a396177a9cb410ff61f20015ad
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//LEGACY, do not use in new systems:
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var sha0 = createHash('sha')
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var sha1 = createHash('sha1')
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```
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## supported hashes
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sha.js currently implements:
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* sha256
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* sha512
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* sha1 (legacy, no not use in new systems)
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* sha (legacy, no not use in new systems)
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## Note
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Note, this doesn't actually implement a stream, but wrapping this in a stream is trivial.
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but is does update incrementally, so you can hash things larger than ram, and also, since it reuses
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the typedarrays, it uses a constant amount of memory (except when using base64 or utf8 encoding,
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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"]
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(http://pajhome.org.uk/crypt/md5/sha1.html)
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## License
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MIT
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