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lancegin
104 lines
2.0 KiB
Markdown
104 lines
2.0 KiB
Markdown
# jsotp
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`jsotp` is a node module to generate and verify one-time passwords that were used to implement 2FA and MFA authentication method in web applications and other login-required systems.
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The module was implement based on [RFC4226](https://tools.ietf.org/html/rfc4226) (HOTP: An HMAC-Based One-Time Password Algorithm) and [RFC6238](https://tools.ietf.org/html/rfc6238) (TOTP: Time-Based One-Time Password Algorithm)
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### Feature
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* Generate random base32 encoded string
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* Generate a `otpauth url` with the b32 encoded string
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* Create a HOTP object with verification
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* Verify a HOTP token
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* Create a TOTP object with verification
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* Verify a TOTP token
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### Installation
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npm install jsotp
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### Module
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All features support:
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let jsotp = require('jsotp');
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Only `Base32` module support:
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let jsotp = require('jsotp/base32');
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Only `HOTP` module support:
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let jsotp = require('jsotp/hotp');
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Only `TOTP` module support:
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let jsotp = require('jsotp/totp');
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### Usage
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#### Time-based OTPs
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```javascript
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// import
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let jsotp = require('jsotp');
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// Create TOTP object
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let totp = jsotp.TOTP.gen('BASE32_ENCODED_SECRET');
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totp.now(); // => 432143
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// Verify for current time
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totp.verify(432143); // => true
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// Verify after 30s
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totp.verify(432143); // => false
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```
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#### Counter-based OTPs
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```javascript
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// import
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let jsotp = require('jsotp');
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// Create HOTP object
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let hotp = jsotp.HOTP.gen('BASE32_ENCODED_SECRET');
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hotp.at(0); // => 432143
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hotp.at(1); // => 231434
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hotp.at(2132); // => 242432
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// Verify with a counter
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hotp.verify(242432, 2132); // => true
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hotp.verify(242432, 2133); // => false
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```
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#### Generate random base32 encoded secret
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```javascript
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// import
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let jsotp = require('jsotp');
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// Generate
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let b32_secret = jsotp.Base32.random_gen();
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```
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### Api
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#### • jsotp.Base32.random_gen()
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#### • jsotp.Util.url_gen
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#### • jsotp.TOTP.gen()
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#### • jsotp.TOTP.now()
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#### • jsotp.TOTP.verify()
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#### • jsotp.HOTP.gen()
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#### • jsotp.HOTP.at()
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#### • jsotp.HOTP.verify()
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### [中文文档](docs/README_zh.md)
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