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48 lines
1.1 KiB
Markdown
48 lines
1.1 KiB
Markdown
# sha.js
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Streamable SHA1 hash in pure javascript.
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[](http://travis-ci.org/dominictarr/sha.js)
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[](https://ci.testling.com/dominictarr/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 sha1 = createHash('sha1')
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var sha256 = createHash('sha256')
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var sha512 = createHash'sha512')
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var h = sha1.update('abc', 'utf8').digest('hex')
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console.log(h) //a9993e364706816aba3e25717850c26c9cd0d89d
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```
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## supported hashes
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sha.js currently implements:
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* sha1
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* sha256
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* sha512
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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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