PHP WebShell

• .. (вверх)
• [DIR] ..
• [FILE] LICENSE
• [FILE] README.md
• [FILE] base.js
• [FILE] index.d.ts
• [FILE] index.js
• [FILE] package.json

Просмотр файла: base.js

'use strict'

var base58 = require('bs58')

module.exports = function (checksumFn) {
  // Encode a buffer as a base58-check encoded string
  function encode (payload) {
    var payloadU8 = Uint8Array.from(payload)
    var checksum = checksumFn(payloadU8)
    var length = payloadU8.length + 4
    var both = new Uint8Array(length)
    both.set(payloadU8, 0)
    both.set(checksum.subarray(0, 4), payloadU8.length)
    return base58.encode(both, length)
  }

  function decodeRaw (buffer) {
    var payload = buffer.slice(0, -4)
    var checksum = buffer.slice(-4)
    var newChecksum = checksumFn(payload)

    if (checksum[0] ^ newChecksum[0] |
        checksum[1] ^ newChecksum[1] |
        checksum[2] ^ newChecksum[2] |
        checksum[3] ^ newChecksum[3]) return

    return payload
  }

  // Decode a base58-check encoded string to a buffer, no result if checksum is wrong
  function decodeUnsafe (string) {
    var buffer = base58.decodeUnsafe(string)
    if (!buffer) return

    return decodeRaw(buffer)
  }

  function decode (string) {
    var buffer = base58.decode(string)
    var payload = decodeRaw(buffer, checksumFn)
    if (!payload) throw new Error('Invalid checksum')
    return payload
  }

  return {
    encode: encode,
    decode: decode,
    decodeUnsafe: decodeUnsafe
  }
}

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