v5.js

/**
 * Convert array of 16 byte values to UUID string format of the form:
 * XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX
 */
var byteToHex = [];
for (var i = 0; i < 256; ++i) {
  byteToHex[i] = (i + 0x100).toString(16).substr(1);
}

function bytesToUuid(buf, offset) {
  var i = offset || 0;
  var bth = byteToHex;
  // join used to fix memory issue caused by concatenation: https://bugs.chromium.org/p/v8/issues/detail?id=3175#c4
  return ([bth[buf[i++]], bth[buf[i++]], 
	bth[buf[i++]], bth[buf[i++]], '-',
	bth[buf[i++]], bth[buf[i++]], '-',
	bth[buf[i++]], bth[buf[i++]], '-',
	bth[buf[i++]], bth[buf[i++]], '-',
	bth[buf[i++]], bth[buf[i++]],
	bth[buf[i++]], bth[buf[i++]],
	bth[buf[i++]], bth[buf[i++]]]).join('');
}

var bytesToUuid_1 = bytesToUuid;

function uuidToBytes(uuid) {
  // Note: We assume we're being passed a valid uuid string
  var bytes = [];
  uuid.replace(/[a-fA-F0-9]{2}/g, function(hex) {
    bytes.push(parseInt(hex, 16));
  });

  return bytes;
}

function stringToBytes(str) {
  str = unescape(encodeURIComponent(str)); // UTF8 escape
  var bytes = new Array(str.length);
  for (var i = 0; i < str.length; i++) {
    bytes[i] = str.charCodeAt(i);
  }
  return bytes;
}

var v35 = function(name, version, hashfunc) {
  var generateUUID = function(value, namespace, buf, offset) {
    var off = buf && offset || 0;

    if (typeof(value) == 'string') value = stringToBytes(value);
    if (typeof(namespace) == 'string') namespace = uuidToBytes(namespace);

    if (!Array.isArray(value)) throw TypeError('value must be an array of bytes');
    if (!Array.isArray(namespace) || namespace.length !== 16) throw TypeError('namespace must be uuid string or an Array of 16 byte values');

    // Per 4.3
    var bytes = hashfunc(namespace.concat(value));
    bytes[6] = (bytes[6] & 0x0f) | version;
    bytes[8] = (bytes[8] & 0x3f) | 0x80;

    if (buf) {
      for (var idx = 0; idx < 16; ++idx) {
        buf[off+idx] = bytes[idx];
      }
    }

    return buf || bytesToUuid_1(bytes);
  };

  // Function#name is not settable on some platforms (#270)
  try {
    generateUUID.name = name;
  } catch (err) {
  }

  // Pre-defined namespaces, per Appendix C
  generateUUID.DNS = '6ba7b810-9dad-11d1-80b4-00c04fd430c8';
  generateUUID.URL = '6ba7b811-9dad-11d1-80b4-00c04fd430c8';

  return generateUUID;
};

// Adapted from Chris Veness' SHA1 code at

function f(s, x, y, z) {
  switch (s) {
    case 0: return (x & y) ^ (~x & z);
    case 1: return x ^ y ^ z;
    case 2: return (x & y) ^ (x & z) ^ (y & z);
    case 3: return x ^ y ^ z;
  }
}

function ROTL(x, n) {
  return (x << n) | (x>>> (32 - n));
}

function sha1(bytes) {
  var K = [0x5a827999, 0x6ed9eba1, 0x8f1bbcdc, 0xca62c1d6];
  var H = [0x67452301, 0xefcdab89, 0x98badcfe, 0x10325476, 0xc3d2e1f0];

  if (typeof(bytes) == 'string') {
    var msg = unescape(encodeURIComponent(bytes)); // UTF8 escape
    bytes = new Array(msg.length);
    for (var i = 0; i < msg.length; i++) bytes[i] = msg.charCodeAt(i);
  }

  bytes.push(0x80);

  var l = bytes.length/4 + 2;
  var N = Math.ceil(l/16);
  var M = new Array(N);

  for (var i=0; i<N; i++) {
    M[i] = new Array(16);
    for (var j=0; j<16; j++) {
      M[i][j] =
        bytes[i * 64 + j * 4] << 24 |
        bytes[i * 64 + j * 4 + 1] << 16 |
        bytes[i * 64 + j * 4 + 2] << 8 |
        bytes[i * 64 + j * 4 + 3];
    }
  }

  M[N - 1][14] = ((bytes.length - 1) * 8) /
    Math.pow(2, 32); M[N - 1][14] = Math.floor(M[N - 1][14]);
  M[N - 1][15] = ((bytes.length - 1) * 8) & 0xffffffff;

  for (var i=0; i<N; i++) {
    var W = new Array(80);

    for (var t=0; t<16; t++) W[t] = M[i][t];
    for (var t=16; t<80; t++) {
      W[t] = ROTL(W[t - 3] ^ W[t - 8] ^ W[t - 14] ^ W[t - 16], 1);
    }

    var a = H[0];
    var b = H[1];
    var c = H[2];
    var d = H[3];
    var e = H[4];

    for (var t=0; t<80; t++) {
      var s = Math.floor(t/20);
      var T = ROTL(a, 5) + f(s, b, c, d) + e + K[s] + W[t] >>> 0;
      e = d;
      d = c;
      c = ROTL(b, 30) >>> 0;
      b = a;
      a = T;
    }

    H[0] = (H[0] + a) >>> 0;
    H[1] = (H[1] + b) >>> 0;
    H[2] = (H[2] + c) >>> 0;
    H[3] = (H[3] + d) >>> 0;
    H[4] = (H[4] + e) >>> 0;
  }

  return [
    H[0] >> 24 & 0xff, H[0] >> 16 & 0xff, H[0] >> 8 & 0xff, H[0] & 0xff,
    H[1] >> 24 & 0xff, H[1] >> 16 & 0xff, H[1] >> 8 & 0xff, H[1] & 0xff,
    H[2] >> 24 & 0xff, H[2] >> 16 & 0xff, H[2] >> 8 & 0xff, H[2] & 0xff,
    H[3] >> 24 & 0xff, H[3] >> 16 & 0xff, H[3] >> 8 & 0xff, H[3] & 0xff,
    H[4] >> 24 & 0xff, H[4] >> 16 & 0xff, H[4] >> 8 & 0xff, H[4] & 0xff
  ];
}

var sha1Browser = sha1;

var v5 = v35('v5', 0x50, sha1Browser);
var v5_1 = v5.uuidv5;

export default v5;
export { v5_1 as uuidv5 };