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buffer-equal-constant-time

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buffer-equal-constant-time

Constant-time comparison of Buffers

1.0.1
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What is buffer-equal-constant-time?

The buffer-equal-constant-time npm package is used to check if two buffers are equal without leaking timing information that could be used to infer the contents of the buffers. This is particularly useful for preventing timing attacks when comparing sensitive data, such as cryptographic hashes or tokens.

What are buffer-equal-constant-time's main functionalities?

Constant-time buffer comparison

This feature allows for the comparison of two buffers in a way that the time taken to compare them does not depend on the number of bytes that match. This is important for security purposes to prevent timing attacks.

const bufferEqualConstantTime = require('buffer-equal-constant-time');
const buffer1 = Buffer.from('sensitive data');
const buffer2 = Buffer.from('sensitive data');
const isEqual = bufferEqualConstantTime(buffer1, buffer2); // returns true if equal, false otherwise

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Package last updated on 16 Dec 2013

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