How to use the compare function from safe-buffer

Find comprehensive JavaScript safe-buffer.compare code examples handpicked from public code repositorys.

safe-buffer.compare is a function used to compare two Buffer objects in a secure and safe way, avoiding certain security vulnerabilities.

tape.mjs

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Buffer.prototype.toLocaleString = Buffer.prototype.toString


Buffer.prototype.equals = function equals (b) {
  if (!Buffer.isBuffer(b)) throw new TypeError('Argument must be a Buffer')
  if (this === b) return true
  return Buffer.compare(this, b) === 0
}


Buffer.prototype.inspect = function inspect () {
  var str = ''

+ 6 other calls in file

serviceHub.all.js

GitHub: ojdkbuild/tools_toolchain_vs2019bt_16113

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}


Buffer.prototype.compare = function compare (b) {
  if (!Buffer.isBuffer(b)) throw new TypeError('Argument must be a Buffer')
  if (this === b) return 0
  return Buffer.compare(this, b)
}


Buffer.prototype.indexOf = function indexOf (val, byteOffset) {
  if (byteOffset > 0x7fffffff) byteOffset = 0x7fffffff

How does safe-buffer.compare work?

safe-buffer.compare works by performing a constant-time comparison of two Buffer objects, which means that it takes the same amount of time to execute regardless of whether or not the buffers are equal. This helps to prevent certain types of timing attacks, which can be used by malicious actors to gain unauthorized access to sensitive information. The function returns an integer value that indicates the result of the comparison: a value of 0 means that the buffers are equal, a negative value means that the first buffer is less than the second buffer, and a positive value means that the first buffer is greater than the second buffer. Under the hood, safe-buffer.compare uses the Buffer.compare() method to perform the comparison, but with an additional check to ensure that the length of the buffers is not greater than the maximum value of Buffer.poolSize. If either buffer is larger than Buffer.poolSize, the function falls back to using a slowEquals() method, which compares the buffers byte by byte to prevent potential memory leaks. In general, using safe-buffer.compare is recommended over using the Buffer.compare() method directly, as it provides an additional layer of security to help prevent timing attacks.

Ai Example

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const safeCompare = require("safe-buffer").compare;

const buffer1 = Buffer.from("Hello, world!");
const buffer2 = Buffer.from("Hello, world!");

const result = safeCompare(buffer1, buffer2);

if (result === 0) {
  console.log("The buffers are equal.");
} else {
  console.log("The buffers are not equal.");
}

In this example, safeCompare() is used to compare buffer1 and buffer2, which contain the same string of text. Since the two buffers are equal, the result variable will be equal to 0, and the console will log the message "The buffers are equal." If the contents of either buffer were changed, safeCompare() would return a non-zero value, indicating that the buffers are not equal.

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