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46 lines
1.6 KiB
Markdown
46 lines
1.6 KiB
Markdown
6 years ago
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Port of the OpenBSD `bcrypt_pbkdf` function to pure Javascript. `npm`-ified
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version of [Devi Mandiri's port](https://github.com/devi/tmp/blob/master/js/bcrypt_pbkdf.js),
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with some minor performance improvements. The code is copied verbatim (and
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un-styled) from Devi's work.
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This product includes software developed by Niels Provos.
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## API
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### `bcrypt_pbkdf.pbkdf(pass, passlen, salt, saltlen, key, keylen, rounds)`
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Derive a cryptographic key of arbitrary length from a given password and salt,
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using the OpenBSD `bcrypt_pbkdf` function. This is a combination of Blowfish and
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SHA-512.
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See [this article](http://www.tedunangst.com/flak/post/bcrypt-pbkdf) for
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further information.
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Parameters:
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* `pass`, a Uint8Array of length `passlen`
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* `passlen`, an integer Number
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* `salt`, a Uint8Array of length `saltlen`
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* `saltlen`, an integer Number
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* `key`, a Uint8Array of length `keylen`, will be filled with output
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* `keylen`, an integer Number
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* `rounds`, an integer Number, number of rounds of the PBKDF to run
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### `bcrypt_pbkdf.hash(sha2pass, sha2salt, out)`
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Calculate a Blowfish hash, given SHA2-512 output of a password and salt. Used as
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part of the inner round function in the PBKDF.
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Parameters:
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* `sha2pass`, a Uint8Array of length 64
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* `sha2salt`, a Uint8Array of length 64
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* `out`, a Uint8Array of length 32, will be filled with output
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## License
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This source form is a 1:1 port from the OpenBSD `blowfish.c` and `bcrypt_pbkdf.c`.
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As a result, it retains the original copyright and license. The two files are
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under slightly different (but compatible) licenses, and are here combined in
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one file. For each of the full license texts see `LICENSE`.
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