payload-validator

payload-validator is a simple and efficient library for signing and validating payloads using a secret. It ensures the integrity of your data by generating and checking signatures based on the content of the payload and a provided secret.

Github Source

https://github.com/jacklehamster/payload-validator/

Installation

Install the package using npm:

npm install payload-validator

Or using bun:

bun add payload-validator

Usage

Importing

import { signedPayload, validatePayload } from 'payload-validator';

Signing a Payload

Use the signedPayload function to sign a payload with a secret:

const payload = { data: 'example' };
const options = { secret: 'mysecret' }; // You can name the secret key anything you want for security
const signed = signedPayload(payload, options);

console.log(signed);
// Output: { data: 'example', signature: 'generated-signature' }

Validating a Payload

Use the validatePayload function to validate a signed payload with a secret:

const isValid = validatePayload(signed, options);

console.log(isValid);
// Output: true

Time Window Mechanism

The library uses a time window mechanism to enhance security. The time window changes every 42 seconds by default, ensuring that the signature is only valid within the current and the previous time window. This adds an additional layer of protection against replay attacks. The time window duration can be customized through the options parameter.

Example with Time Window

import { signedPayload, validatePayload } from 'payload-validator';

const payload = { data: 'test' };
const options = { secret: 'mysecret', timeWindow: 1000 * 42 };

// Signing the payload
const signed = signedPayload(payload, options);
console.log(signed); // { data: 'test', signature: '...' }

// Validating the payload
const isValid = validatePayload(signed, options);
console.log(isValid); // true

// Invalid validation with a wrong secret
 const wrongOptions = { secret: 'wrongsecret', timeWindow: 1000 * 42 };
 const isValidWrongSecret = validatePayload(signed, wrongOptions);
 console.log(isValidWrongSecret); // false

API

signedPayload(payload: SignedPayload, secret: string = ""): SignedPayload

Signs the given payload using the provided secret and returns a new payload with the added signature.

• payload: The payload object to be signed.
• secret: The secret string used for signing the payload.

Returns the signed payload object.

validatePayload(payload: SignedPayload, secret: string = ""): boolean

Validates the given signed payload using the provided secret.

• payload: The signed payload object to be validated.
• secret: The secret string used for validating the payload.

Returns true if the payload is valid, otherwise false.

Example

https://jacklehamster.github.io/payload-validator/example/

import { signedPayload, validatePayload } from 'payload-validator';

const payload = { data: 'test' };

const options = { secret: 'mysecret' }; // You can name the secret key anything you want for security
const signed = signedPayload(payload, options);

console.log(signed); // { data: 'test', signature: '...' }

// Validating the payload
const isValid = validatePayload(signed, options);
console.log(isValid); // true

// Invalid validation with a wrong secret
const isValidWrongSecret = validatePayload(signed, { secret: 'wrongsecret' });
console.log(isValidWrongSecret); // false

License

This project is licensed under the MIT License.

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