Otp Generator App My Key

PyOTP - The Python One-Time Password Library. Google Authenticator and other OTP client apps allow you to store multiple OTP secrets and provision those using a QR Code. Period (int) – the number of seconds the OTP generator is set to expire every code. Returns: provisioning uri.

One-time password (OTP): A one-time password (OTP) is an automatically generated numeric or alphanumeric string of characters that authenticates the user for a single transaction or session.
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OTP verification using Cryptography and without any Database

Background

This module is derived from my blog post on the technique. You can read the blog post here to understand the technique and motivation.

Otp Generator App My Key Code

Dependencies:

This module depends on the Crypto built in module on nodeJS. This is the only dependency and should work in any system that has crypto support (Which is technocally majority of the systems at this moment) Quake 3 arena steam key generator.

This module also uses some modern JavaScript features like Template literals, Default arguments and modern object literal. This might be a problem if you are planning to use it with older versions of nodeJS

Installation

You can use npm to install the package with the following code

Usage

You need additional tool to create OTP, and send SMS. This module only takes care of the verification part.

You can take a look at the otp-generator module to create OTP for your users.

Verification process

OTP verification is done in the following steps:

A hash is created with the phone number/email address and then sent to the user.
The user also receives the OTP via SMS, email or any other method.
The user sends back the hash, OTP and phone/email used in the first request.
The server verifies the information and returns true if they match.

Here's a diagram that shows the whole process:

Generating OTP Hash

We will use the otp-generator tool mentioned previously to create OTP. You can use any other tool or technique.

You can then send this hash to the user as response. The generate method takes these following arguments (In particular order),

Argument	Required	default	Description
phoneOrEmail	true	N/A	Phone or email
otp	true	N/A	OTP
key	false	'	unique and secret key for HMAC see: createHmac
expiresAfter	false	5	Expirty in minutes
algorithm	false	`sha256`	Algorithm used for hashing the data. Any supported algorithm from OpenSSL

Verifying OTP hash

The user should get the hash from the HTTP request and should get the real OTP via SMS or email.

Then when the user sends back the information, they can be verified with the following code:

This method returns a Boolean. If the verification is successful, it will return true.

Mobile Otp App

This method also takes the following arguments in particular order:

Otp Generator App My Key Finder

Argument	Required	default	Description
phoneOrEmail	true	N/A	Phone or email
otp	true	N/A	OTP
hash	true	N/A	The hash that was returned from the user
key	false	'	unique and secret key for HMAC see: createHmac
algorithm	false	`sha256`	Algorithm used for hashing the data. Any supported algorithm from OpenSSL

This product is created with ðŸ–¤ by Anam Ahmed, Any improvements and PR is welcome.