know-js/lib/crypto.js

JavaScript library for sending Know transactions from the client or server

var createHash = require('create-hash')

/**
 * @memberof module:crypto
 * @param {string|Buffer} buffer
 * @returns {Buffer}
 */
function ripemd160 (buffer) {
  return createHash('rmd160').update(buffer).digest()
}

/**
 * @memberof module:crypto
 * @param {string|Buffer} buffer
 * @returns {Buffer}
 */
function sha1 (buffer) {
  return createHash('sha1').update(buffer).digest()
}

/**
 * @memberof module:crypto
 * @param {string|Buffer} buffer
 * @returns {Buffer}
 */
function sha256 (buffer) {
  return createHash('sha256').update(buffer).digest()
}

/**
 * @memberof module:crypto
 * @param {string|Buffer} buffer
 * @returns {Buffer}
 */
function hash160 (buffer) {
  return ripemd160(sha256(buffer))
}

/**
 * @memberof module:crypto
 * @param {string|Buffer} buffer
 * @returns {Buffer}
 */
function hash256 (buffer) {
  return sha256(sha256(buffer))
}

module.exports = {
  hash160: hash160,
  hash256: hash256,
  ripemd160: ripemd160,
  sha1: sha1,
  sha256: sha256
}