Add node modules and compiled JavaScript from main (#54)

Co-authored-by: Oliver King <oking3@uncc.edu>

node_modules/jose/lib/help/base64url.js

@@ -0,0 +1,64 @@
+let encode
+let encodeBuffer
+if (Buffer.isEncoding('base64url')) {
+  encode = (input, encoding = 'utf8') => Buffer.from(input, encoding).toString('base64url')
+  encodeBuffer = (buf) => buf.toString('base64url')
+} else {
+  const fromBase64 = (base64) => base64.replace(/=/g, '').replace(/\+/g, '-').replace(/\//g, '_')
+  encode = (input, encoding = 'utf8') => fromBase64(Buffer.from(input, encoding).toString('base64'))
+  encodeBuffer = (buf) => fromBase64(buf.toString('base64'))
+}
+
+const decodeToBuffer = (input) => {
+  return Buffer.from(input, 'base64')
+}
+
+const decode = (input, encoding = 'utf8') => {
+  return decodeToBuffer(input).toString(encoding)
+}
+
+const b64uJSON = {
+  encode: (input) => {
+    return encode(JSON.stringify(input))
+  },
+  decode: (input, encoding = 'utf8') => {
+    return JSON.parse(decode(input, encoding))
+  }
+}
+
+b64uJSON.decode.try = (input, encoding = 'utf8') => {
+  try {
+    return b64uJSON.decode(input, encoding)
+  } catch (err) {
+    return decode(input, encoding)
+  }
+}
+
+const bnToBuf = (bn) => {
+  let hex = BigInt(bn).toString(16)
+  if (hex.length % 2) {
+    hex = `0${hex}`
+  }
+
+  const len = hex.length / 2
+  const u8 = new Uint8Array(len)
+
+  let i = 0
+  let j = 0
+  while (i < len) {
+    u8[i] = parseInt(hex.slice(j, j + 2), 16)
+    i += 1
+    j += 2
+  }
+
+  return u8
+}
+
+const encodeBigInt = (bn) => encodeBuffer(Buffer.from(bnToBuf(bn)))
+
+module.exports.decode = decode
+module.exports.decodeToBuffer = decodeToBuffer
+module.exports.encode = encode
+module.exports.encodeBuffer = encodeBuffer
+module.exports.JSON = b64uJSON
+module.exports.encodeBigInt = encodeBigInt