Viewing File: /home/ubuntu/todaykat-frontend-base/node_modules/ethereumjs-util/dist/secp256k1-lib/der.js

"use strict";

// This file is imported from secp256k1 v3
// https://github.com/cryptocoinjs/secp256k1-node/blob/master/LICENSE

var EC_PRIVKEY_EXPORT_DER_COMPRESSED = Buffer.from([
// begin
0x30, 0x81, 0xd3, 0x02, 0x01, 0x01, 0x04, 0x20,
// private key
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
// middle
0xa0, 0x81, 0x85, 0x30, 0x81, 0x82, 0x02, 0x01, 0x01, 0x30, 0x2c, 0x06, 0x07, 0x2a, 0x86, 0x48, 0xce, 0x3d, 0x01, 0x01, 0x02, 0x21, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfe, 0xff, 0xff, 0xfc, 0x2f, 0x30, 0x06, 0x04, 0x01, 0x00, 0x04, 0x01, 0x07, 0x04, 0x21, 0x02, 0x79, 0xbe, 0x66, 0x7e, 0xf9, 0xdc, 0xbb, 0xac, 0x55, 0xa0, 0x62, 0x95, 0xce, 0x87, 0x0b, 0x07, 0x02, 0x9b, 0xfc, 0xdb, 0x2d, 0xce, 0x28, 0xd9, 0x59, 0xf2, 0x81, 0x5b, 0x16, 0xf8, 0x17, 0x98, 0x02, 0x21, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfe, 0xba, 0xae, 0xdc, 0xe6, 0xaf, 0x48, 0xa0, 0x3b, 0xbf, 0xd2, 0x5e, 0x8c, 0xd0, 0x36, 0x41, 0x41, 0x02, 0x01, 0x01, 0xa1, 0x24, 0x03, 0x22, 0x00,
// public key
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00]);

var EC_PRIVKEY_EXPORT_DER_UNCOMPRESSED = Buffer.from([
// begin
0x30, 0x82, 0x01, 0x13, 0x02, 0x01, 0x01, 0x04, 0x20,
// private key
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
// middle
0xa0, 0x81, 0xa5, 0x30, 0x81, 0xa2, 0x02, 0x01, 0x01, 0x30, 0x2c, 0x06, 0x07, 0x2a, 0x86, 0x48, 0xce, 0x3d, 0x01, 0x01, 0x02, 0x21, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfe, 0xff, 0xff, 0xfc, 0x2f, 0x30, 0x06, 0x04, 0x01, 0x00, 0x04, 0x01, 0x07, 0x04, 0x41, 0x04, 0x79, 0xbe, 0x66, 0x7e, 0xf9, 0xdc, 0xbb, 0xac, 0x55, 0xa0, 0x62, 0x95, 0xce, 0x87, 0x0b, 0x07, 0x02, 0x9b, 0xfc, 0xdb, 0x2d, 0xce, 0x28, 0xd9, 0x59, 0xf2, 0x81, 0x5b, 0x16, 0xf8, 0x17, 0x98, 0x48, 0x3a, 0xda, 0x77, 0x26, 0xa3, 0xc4, 0x65, 0x5d, 0xa4, 0xfb, 0xfc, 0x0e, 0x11, 0x08, 0xa8, 0xfd, 0x17, 0xb4, 0x48, 0xa6, 0x85, 0x54, 0x19, 0x9c, 0x47, 0xd0, 0x8f, 0xfb, 0x10, 0xd4, 0xb8, 0x02, 0x21, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfe, 0xba, 0xae, 0xdc, 0xe6, 0xaf, 0x48, 0xa0, 0x3b, 0xbf, 0xd2, 0x5e, 0x8c, 0xd0, 0x36, 0x41, 0x41, 0x02, 0x01, 0x01, 0xa1, 0x44, 0x03, 0x42, 0x00,
// public key
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00]);

exports.privateKeyExport = function (privateKey, publicKey, compressed) {
  var result = Buffer.from(compressed ? EC_PRIVKEY_EXPORT_DER_COMPRESSED : EC_PRIVKEY_EXPORT_DER_UNCOMPRESSED);
  privateKey.copy(result, compressed ? 8 : 9);
  publicKey.copy(result, compressed ? 181 : 214);
  return result;
};

exports.privateKeyImport = function (privateKey) {
  var length = privateKey.length;

  // sequence header
  var index = 0;
  if (length < index + 1 || privateKey[index] !== 0x30) return null;
  index += 1;

  // sequence length constructor
  if (length < index + 1 || !(privateKey[index] & 0x80)) return null;

  var lenb = privateKey[index] & 0x7f;
  index += 1;
  if (lenb < 1 || lenb > 2) return null;
  if (length < index + lenb) return null;

  // sequence length
  var len = privateKey[index + lenb - 1] | (lenb > 1 ? privateKey[index + lenb - 2] << 8 : 0);
  index += lenb;
  if (length < index + len) return null;

  // sequence element 0: version number (=1)
  if (length < index + 3 || privateKey[index] !== 0x02 || privateKey[index + 1] !== 0x01 || privateKey[index + 2] !== 0x01) {
    return null;
  }
  index += 3;

  // sequence element 1: octet string, up to 32 bytes
  if (length < index + 2 || privateKey[index] !== 0x04 || privateKey[index + 1] > 0x20 || length < index + 2 + privateKey[index + 1]) {
    return null;
  }

  return privateKey.slice(index + 2, index + 2 + privateKey[index + 1]);
};

exports.signatureImportLax = function (signature) {
  var r = Buffer.alloc(32, 0);
  var s = Buffer.alloc(32, 0);

  var length = signature.length;
  var index = 0;

  // sequence tag byte
  if (signature[index++] !== 0x30) {
    return null;
  }

  // sequence length byte
  var lenbyte = signature[index++];
  if (lenbyte & 0x80) {
    index += lenbyte - 0x80;
    if (index > length) {
      return null;
    }
  }

  // sequence tag byte for r
  if (signature[index++] !== 0x02) {
    return null;
  }

  // length for r
  var rlen = signature[index++];
  if (rlen & 0x80) {
    lenbyte = rlen - 0x80;
    if (index + lenbyte > length) {
      return null;
    }
    for (; lenbyte > 0 && signature[index] === 0x00; index += 1, lenbyte -= 1) {}
    for (rlen = 0; lenbyte > 0; index += 1, lenbyte -= 1) {
      rlen = (rlen << 8) + signature[index];
    }
  }
  if (rlen > length - index) {
    return null;
  }
  var rindex = index;
  index += rlen;

  // sequence tag byte for s
  if (signature[index++] !== 0x02) {
    return null;
  }

  // length for s
  var slen = signature[index++];
  if (slen & 0x80) {
    lenbyte = slen - 0x80;
    if (index + lenbyte > length) {
      return null;
    }
    for (; lenbyte > 0 && signature[index] === 0x00; index += 1, lenbyte -= 1) {}
    for (slen = 0; lenbyte > 0; index += 1, lenbyte -= 1) {
      slen = (slen << 8) + signature[index];
    }
  }
  if (slen > length - index) {
    return null;
  }
  var sindex = index;
  index += slen;

  // ignore leading zeros in r
  for (; rlen > 0 && signature[rindex] === 0x00; rlen -= 1, rindex += 1) {}
  // copy r value
  if (rlen > 32) {
    return null;
  }
  var rvalue = signature.slice(rindex, rindex + rlen);
  rvalue.copy(r, 32 - rvalue.length);

  // ignore leading zeros in s
  for (; slen > 0 && signature[sindex] === 0x00; slen -= 1, sindex += 1) {}
  // copy s value
  if (slen > 32) {
    return null;
  }
  var svalue = signature.slice(sindex, sindex + slen);
  svalue.copy(s, 32 - svalue.length);

  return { r: r, s: s };
};