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49 lines
1.7 KiB
Markdown
49 lines
1.7 KiB
Markdown
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hotp-js - A simple JavaScript HOTP implementation
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=================================================
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A simple JavaScript HOTP implementation (HMAC-Based One-Time Password Algorithm) as described in [RFC4226](http://tools.ietf.org/html/rfc4226). The library is relying on [crypto-js](http://code.google.com/p/crypto-js/) for the javascript HMAC-SHA1 implementation.
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How to use it
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-------------
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Load the htop.js, set the private key of the token and the count step.
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```javascript
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otp = hotp("3132333435363738393031323334353637383930","4","dec6");
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```
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The following output formats are supported:
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* hex40 - truncated 10 bytes hexadecimal representation
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* dec6 - truncated 6 bytes decimal representation (HOTP)
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* dec7 - truncated 7 bytes decimal representation
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* dec8 - truncated 8 bytes decimal representation
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Security recommendations
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------------------------
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* Don't forget to protect the key of the token along with the count value (e.g. local encryption of the software token).
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* Code is experimental.
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License
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-------
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```
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Copyright (C) 2009 Alexandre Dulaunoy
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU Affero General Public License as
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published by the Free Software Foundation, either version 3 of the
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License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Affero General Public License for more details.
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You should have received a copy of the GNU Affero General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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```
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