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   1  <?php
   2  
   3  declare(strict_types=1);
   4  
   5  /*
   6   * The MIT License (MIT)
   7   *
   8   * Copyright (c) 2018-2020 Spomky-Labs
   9   *
  10   * This software may be modified and distributed under the terms
  11   * of the MIT license.  See the LICENSE file for details.
  12   */
  13  
  14  namespace CBOR;
  15  
  16  use Brick\Math\BigInteger;
  17  use GMP;
  18  use InvalidArgumentException;
  19  
  20  final class UnsignedIntegerObject extends AbstractCBORObject
  21  {
  22      private const MAJOR_TYPE = 0b000;
  23  
  24      /**
  25       * @var string|null
  26       */
  27      private $data;
  28  
  29      public function __construct(int $additionalInformation, ?string $data)
  30      {
  31          parent::__construct(self::MAJOR_TYPE, $additionalInformation);
  32          $this->data = $data;
  33      }
  34  
  35      public function __toString(): string
  36      {
  37          $result = parent::__toString();
  38          if (null !== $this->data) {
  39              $result .= $this->data;
  40          }
  41  
  42          return $result;
  43      }
  44  
  45      public static function createObjectForValue(int $additionalInformation, ?string $data): self
  46      {
  47          return new self($additionalInformation, $data);
  48      }
  49  
  50      public static function create(int $value): self
  51      {
  52          return self::createFromString((string) $value);
  53      }
  54  
  55      public static function createFromHex(string $value): self
  56      {
  57          $integer = BigInteger::fromBase($value, 16);
  58  
  59          return self::createBigInteger($integer);
  60      }
  61  
  62      public static function createFromString(string $value): self
  63      {
  64          $integer = BigInteger::of($value);
  65  
  66          return self::createBigInteger($integer);
  67      }
  68  
  69      /**
  70       * @deprecated Deprecated since v1.1 and will be removed in v2.0. Please use "create" or "createFromString" instead
  71       */
  72      public static function createFromGmpValue(GMP $value): self
  73      {
  74          if (gmp_cmp($value, gmp_init(0)) < 0) {
  75              throw new InvalidArgumentException('The value must be a positive integer.');
  76          }
  77  
  78          switch (true) {
  79              case gmp_cmp($value, gmp_init(24)) < 0:
  80                  $ai = gmp_intval($value);
  81                  $data = null;
  82                  break;
  83              case gmp_cmp($value, gmp_init('FF', 16)) < 0:
  84                  $ai = 24;
  85                  $data = self::hex2bin(str_pad(gmp_strval($value, 16), 2, '0', STR_PAD_LEFT));
  86                  break;
  87              case gmp_cmp($value, gmp_init('FFFF', 16)) < 0:
  88                  $ai = 25;
  89                  $data = self::hex2bin(str_pad(gmp_strval($value, 16), 4, '0', STR_PAD_LEFT));
  90                  break;
  91              case gmp_cmp($value, gmp_init('FFFFFFFF', 16)) < 0:
  92                  $ai = 26;
  93                  $data = self::hex2bin(str_pad(gmp_strval($value, 16), 8, '0', STR_PAD_LEFT));
  94                  break;
  95              default:
  96                  throw new InvalidArgumentException('Out of range. Please use PositiveBigIntegerTag tag with ByteStringObject object instead.');
  97          }
  98  
  99          return new self($ai, $data);
 100      }
 101  
 102      public function getMajorType(): int
 103      {
 104          return self::MAJOR_TYPE;
 105      }
 106  
 107      public function getAdditionalInformation(): int
 108      {
 109          return $this->additionalInformation;
 110      }
 111  
 112      public function getValue(): string
 113      {
 114          return $this->getNormalizedData();
 115      }
 116  
 117      public function getNormalizedData(bool $ignoreTags = false): string
 118      {
 119          if (null === $this->data) {
 120              return (string) $this->additionalInformation;
 121          }
 122  
 123          $integer = BigInteger::fromBase(bin2hex($this->data), 16);
 124  
 125          return $integer->toBase(10);
 126      }
 127  
 128      private static function createBigInteger(BigInteger $integer): self
 129      {
 130          if ($integer->isLessThan(BigInteger::zero())) {
 131              throw new InvalidArgumentException('The value must be a positive integer.');
 132          }
 133  
 134          switch (true) {
 135              case $integer->isLessThan(BigInteger::of(24)):
 136                  $ai = $integer->toInt();
 137                  $data = null;
 138                  break;
 139              case $integer->isLessThan(BigInteger::fromBase('FF', 16)):
 140                  $ai = 24;
 141                  $data = self::hex2bin(str_pad($integer->toBase(16), 2, '0', STR_PAD_LEFT));
 142                  break;
 143              case $integer->isLessThan(BigInteger::fromBase('FFFF', 16)):
 144                  $ai = 25;
 145                  $data = self::hex2bin(str_pad($integer->toBase(16), 4, '0', STR_PAD_LEFT));
 146                  break;
 147              case $integer->isLessThan(BigInteger::fromBase('FFFFFFFF', 16)):
 148                  $ai = 26;
 149                  $data = self::hex2bin(str_pad($integer->toBase(16), 8, '0', STR_PAD_LEFT));
 150                  break;
 151              default:
 152                  throw new InvalidArgumentException('Out of range. Please use PositiveBigIntegerTag tag with ByteStringObject object instead.');
 153          }
 154  
 155          return new self($ai, $data);
 156      }
 157  
 158      private static function hex2bin(string $data): string
 159      {
 160          $result = hex2bin($data);
 161          if (false === $result) {
 162              throw new InvalidArgumentException('Unable to convert the data');
 163          }
 164  
 165          return $result;
 166      }
 167  }