sop / asn1

lib/ASN1/Component/Length.php

Indentation +201 added lines, -201 removed lines

@@ -12,214 +12,214 @@
  */
 class Length implements Encodable
 {
-    /**
-     * Length.
-     *
-     * @var BigInt
-     */
-    private $_length;
+	/**
+	 * Length.
+	 *
+	 * @var BigInt
+	 */
+	private $_length;
     
-    /**
-     * Whether length is indefinite.
-     *
-     * @var bool
-     */
-    private $_indefinite;
+	/**
+	 * Whether length is indefinite.
+	 *
+	 * @var bool
+	 */
+	private $_indefinite;
     
-    /**
-     * Constructor.
-     *
-     * @param int|string $length Length
-     * @param bool $indefinite Whether length is indefinite
-     */
-    public function __construct($length, bool $indefinite = false)
-    {
-        $this->_length = new BigInt($length);
-        $this->_indefinite = $indefinite;
-    }
+	/**
+	 * Constructor.
+	 *
+	 * @param int|string $length Length
+	 * @param bool $indefinite Whether length is indefinite
+	 */
+	public function __construct($length, bool $indefinite = false)
+	{
+		$this->_length = new BigInt($length);
+		$this->_indefinite = $indefinite;
+	}
     
-    /**
-     * Decode length component from DER data.
-     *
-     * @param string $data DER encoded data
-     * @param int|null $offset Reference to the variable that contains offset
-     *        into the data where to start parsing. Variable is updated to
-     *        the offset next to the parsed length component. If null, start
-     *        from offset 0.
-     * @throws DecodeException If decoding fails
-     * @return self
-     */
-    public static function fromDER(string $data, int &$offset = null): self
-    {
-        $idx = $offset ?? 0;
-        $datalen = strlen($data);
-        if ($idx >= $datalen) {
-            throw new DecodeException(
-                "Unexpected end of data while decoding length.");
-        }
-        $indefinite = false;
-        $byte = ord($data[$idx++]);
-        // bits 7 to 1
-        $length = (0x7f & $byte);
-        // long form
-        if (0x80 & $byte) {
-            if (!$length) {
-                $indefinite = true;
-            } else {
-                if ($idx + $length > $datalen) {
-                    throw new DecodeException(
-                        "Unexpected end of data while decoding long form length.");
-                }
-                $length = self::_decodeLongFormLength($length, $data, $idx);
-            }
-        }
-        if (isset($offset)) {
-            $offset = $idx;
-        }
-        return new self($length, $indefinite);
-    }
+	/**
+	 * Decode length component from DER data.
+	 *
+	 * @param string $data DER encoded data
+	 * @param int|null $offset Reference to the variable that contains offset
+	 *        into the data where to start parsing. Variable is updated to
+	 *        the offset next to the parsed length component. If null, start
+	 *        from offset 0.
+	 * @throws DecodeException If decoding fails
+	 * @return self
+	 */
+	public static function fromDER(string $data, int &$offset = null): self
+	{
+		$idx = $offset ?? 0;
+		$datalen = strlen($data);
+		if ($idx >= $datalen) {
+			throw new DecodeException(
+				"Unexpected end of data while decoding length.");
+		}
+		$indefinite = false;
+		$byte = ord($data[$idx++]);
+		// bits 7 to 1
+		$length = (0x7f & $byte);
+		// long form
+		if (0x80 & $byte) {
+			if (!$length) {
+				$indefinite = true;
+			} else {
+				if ($idx + $length > $datalen) {
+					throw new DecodeException(
+						"Unexpected end of data while decoding long form length.");
+				}
+				$length = self::_decodeLongFormLength($length, $data, $idx);
+			}
+		}
+		if (isset($offset)) {
+			$offset = $idx;
+		}
+		return new self($length, $indefinite);
+	}
     
-    /**
-     * Decode long form length.
-     *
-     * @param int $length Number of octets
-     * @param string $data Data
-     * @param int $offset Reference to the variable containing offset to the
-     *        data.
-     * @throws DecodeException If decoding fails
-     * @return string Integer as a string
-     */
-    private static function _decodeLongFormLength(int $length, string $data,
-        int &$offset): string
-    {
-        // first octet must not be 0xff (spec 8.1.3.5c)
-        if ($length == 127) {
-            throw new DecodeException("Invalid number of length octets.");
-        }
-        $num = gmp_init(0, 10);
-        while (--$length >= 0) {
-            $byte = ord($data[$offset++]);
-            $num <<= 8;
-            $num |= $byte;
-        }
-        return gmp_strval($num);
-    }
+	/**
+	 * Decode long form length.
+	 *
+	 * @param int $length Number of octets
+	 * @param string $data Data
+	 * @param int $offset Reference to the variable containing offset to the
+	 *        data.
+	 * @throws DecodeException If decoding fails
+	 * @return string Integer as a string
+	 */
+	private static function _decodeLongFormLength(int $length, string $data,
+		int &$offset): string
+	{
+		// first octet must not be 0xff (spec 8.1.3.5c)
+		if ($length == 127) {
+			throw new DecodeException("Invalid number of length octets.");
+		}
+		$num = gmp_init(0, 10);
+		while (--$length >= 0) {
+			$byte = ord($data[$offset++]);
+			$num <<= 8;
+			$num |= $byte;
+		}
+		return gmp_strval($num);
+	}
     
-    /**
-     * Decode length from DER.
-     *
-     * Throws an exception if length doesn't match with expected or if data
-     * doesn't contain enough bytes.
-     *
-     * Requirement of definite length is relaxed contrary to the specification
-     * (sect. 10.1).
-     *
-     * @see self::fromDER
-     * @param string $data DER data
-     * @param int $offset Reference to the offset variable
-     * @param int|null $expected Expected length, null to bypass checking
-     * @throws DecodeException If decoding or expectation fails
-     * @return self
-     */
-    public static function expectFromDER(string $data, int &$offset,
-        int $expected = null): self
-    {
-        $idx = $offset;
-        $length = self::fromDER($data, $idx);
-        // if certain length was expected
-        if (isset($expected)) {
-            if ($length->isIndefinite()) {
-                throw new DecodeException('Expected length %d, got indefinite.',
-                    $expected);
-            }
-            if ($expected != $length->intLength()) {
-                throw new DecodeException(
-                    sprintf("Expected length %d, got %d.", $expected,
-                        $length->intLength()));
-            }
-        }
-        // check that enough data is available
-        if (!$length->isIndefinite() &&
-            strlen($data) < $idx + $length->intLength()) {
-            throw new DecodeException(
-                sprintf("Length %d overflows data, %d bytes left.",
-                    $length->intLength(), strlen($data) - $idx));
-        }
-        $offset = $idx;
-        return $length;
-    }
+	/**
+	 * Decode length from DER.
+	 *
+	 * Throws an exception if length doesn't match with expected or if data
+	 * doesn't contain enough bytes.
+	 *
+	 * Requirement of definite length is relaxed contrary to the specification
+	 * (sect. 10.1).
+	 *
+	 * @see self::fromDER
+	 * @param string $data DER data
+	 * @param int $offset Reference to the offset variable
+	 * @param int|null $expected Expected length, null to bypass checking
+	 * @throws DecodeException If decoding or expectation fails
+	 * @return self
+	 */
+	public static function expectFromDER(string $data, int &$offset,
+		int $expected = null): self
+	{
+		$idx = $offset;
+		$length = self::fromDER($data, $idx);
+		// if certain length was expected
+		if (isset($expected)) {
+			if ($length->isIndefinite()) {
+				throw new DecodeException('Expected length %d, got indefinite.',
+					$expected);
+			}
+			if ($expected != $length->intLength()) {
+				throw new DecodeException(
+					sprintf("Expected length %d, got %d.", $expected,
+						$length->intLength()));
+			}
+		}
+		// check that enough data is available
+		if (!$length->isIndefinite() &&
+			strlen($data) < $idx + $length->intLength()) {
+			throw new DecodeException(
+				sprintf("Length %d overflows data, %d bytes left.",
+					$length->intLength(), strlen($data) - $idx));
+		}
+		$offset = $idx;
+		return $length;
+	}
     
-    /**
-     *
-     * @see Encodable::toDER()
-     * @throws \DomainException If length is too large to encode
-     * @return string
-     */
-    public function toDER(): string
-    {
-        $bytes = [];
-        if ($this->_indefinite) {
-            $bytes[] = 0x80;
-        } else {
-            $num = $this->_length->gmpObj();
-            // long form
-            if ($num > 127) {
-                $octets = [];
-                for (; $num > 0; $num >>= 8) {
-                    $octets[] = gmp_intval(0xff & $num);
-                }
-                $count = count($octets);
-                // first octet must not be 0xff
-                if ($count >= 127) {
-                    throw new \DomainException("Too many length octets.");
-                }
-                $bytes[] = 0x80 | $count;
-                foreach (array_reverse($octets) as $octet) {
-                    $bytes[] = $octet;
-                }
-            } else { // short form
-                $bytes[] = gmp_intval($num);
-            }
-        }
-        return pack("C*", ...$bytes);
-    }
+	/**
+	 *
+	 * @see Encodable::toDER()
+	 * @throws \DomainException If length is too large to encode
+	 * @return string
+	 */
+	public function toDER(): string
+	{
+		$bytes = [];
+		if ($this->_indefinite) {
+			$bytes[] = 0x80;
+		} else {
+			$num = $this->_length->gmpObj();
+			// long form
+			if ($num > 127) {
+				$octets = [];
+				for (; $num > 0; $num >>= 8) {
+					$octets[] = gmp_intval(0xff & $num);
+				}
+				$count = count($octets);
+				// first octet must not be 0xff
+				if ($count >= 127) {
+					throw new \DomainException("Too many length octets.");
+				}
+				$bytes[] = 0x80 | $count;
+				foreach (array_reverse($octets) as $octet) {
+					$bytes[] = $octet;
+				}
+			} else { // short form
+				$bytes[] = gmp_intval($num);
+			}
+		}
+		return pack("C*", ...$bytes);
+	}
     
-    /**
-     * Get the length.
-     *
-     * @throws \LogicException If length is indefinite
-     * @return string Length as an integer string
-     */
-    public function length(): string
-    {
-        if ($this->_indefinite) {
-            throw new \LogicException("Length is indefinite.");
-        }
-        return $this->_length->base10();
-    }
+	/**
+	 * Get the length.
+	 *
+	 * @throws \LogicException If length is indefinite
+	 * @return string Length as an integer string
+	 */
+	public function length(): string
+	{
+		if ($this->_indefinite) {
+			throw new \LogicException("Length is indefinite.");
+		}
+		return $this->_length->base10();
+	}
     
-    /**
-     * Get the length as an integer.
-     *
-     * @throws \LogicException If length is indefinite
-     * @throws \RuntimeException If length overflows integer size
-     * @return int
-     */
-    public function intLength(): int
-    {
-        if ($this->_indefinite) {
-            throw new \LogicException("Length is indefinite.");
-        }
-        return $this->_length->intVal();
-    }
+	/**
+	 * Get the length as an integer.
+	 *
+	 * @throws \LogicException If length is indefinite
+	 * @throws \RuntimeException If length overflows integer size
+	 * @return int
+	 */
+	public function intLength(): int
+	{
+		if ($this->_indefinite) {
+			throw new \LogicException("Length is indefinite.");
+		}
+		return $this->_length->intVal();
+	}
     
-    /**
-     * Whether length is indefinite.
-     *
-     * @return bool
-     */
-    public function isIndefinite(): bool
-    {
-        return $this->_indefinite;
-    }
+	/**
+	 * Whether length is indefinite.
+	 *
+	 * @return bool
+	 */
+	public function isIndefinite(): bool
+	{
+		return $this->_indefinite;
+	}
 }

lib/ASN1/Type/Structure.php

Indentation +368 added lines, -368 removed lines

@@ -13,396 +13,396 @@
  * Base class for the constructed types.
  */
 abstract class Structure extends Element implements 
-    \Countable,
-    \IteratorAggregate
+	\Countable,
+	\IteratorAggregate
 {
-    use UniversalClass;
+	use UniversalClass;
     
-    /**
-     * Array of elements in the structure.
-     *
-     * @var Element[] $_elements
-     */
-    protected $_elements;
+	/**
+	 * Array of elements in the structure.
+	 *
+	 * @var Element[] $_elements
+	 */
+	protected $_elements;
     
-    /**
-     * Lookup table for the tagged elements.
-     *
-     * @var TaggedType[]|null $_taggedMap
-     */
-    private $_taggedMap;
+	/**
+	 * Lookup table for the tagged elements.
+	 *
+	 * @var TaggedType[]|null $_taggedMap
+	 */
+	private $_taggedMap;
     
-    /**
-     * Cache variable of elements wrapped into UnspecifiedType objects.
-     *
-     * @var UnspecifiedType[]|null $_unspecifiedTypes
-     */
-    private $_unspecifiedTypes;
+	/**
+	 * Cache variable of elements wrapped into UnspecifiedType objects.
+	 *
+	 * @var UnspecifiedType[]|null $_unspecifiedTypes
+	 */
+	private $_unspecifiedTypes;
     
-    /**
-     * Constructor.
-     *
-     * @param ElementBase ...$elements Any number of elements
-     */
-    public function __construct(ElementBase ...$elements)
-    {
-        $this->_elements = array_map(
-            function (ElementBase $el) {
-                return $el->asElement();
-            }, $elements);
-    }
+	/**
+	 * Constructor.
+	 *
+	 * @param ElementBase ...$elements Any number of elements
+	 */
+	public function __construct(ElementBase ...$elements)
+	{
+		$this->_elements = array_map(
+			function (ElementBase $el) {
+				return $el->asElement();
+			}, $elements);
+	}
     
-    /**
-     * Clone magic method.
-     */
-    public function __clone()
-    {
-        // clear cache-variables
-        $this->_taggedMap = null;
-        $this->_unspecifiedTypes = null;
-    }
+	/**
+	 * Clone magic method.
+	 */
+	public function __clone()
+	{
+		// clear cache-variables
+		$this->_taggedMap = null;
+		$this->_unspecifiedTypes = null;
+	}
     
-    /**
-     *
-     * @see \ASN1\Element::isConstructed()
-     * @return bool
-     */
-    public function isConstructed(): bool
-    {
-        return true;
-    }
+	/**
+	 *
+	 * @see \ASN1\Element::isConstructed()
+	 * @return bool
+	 */
+	public function isConstructed(): bool
+	{
+		return true;
+	}
     
-    /**
-     *
-     * @see \ASN1\Element::_encodedContentDER()
-     * @return string
-     */
-    protected function _encodedContentDER(): string
-    {
-        $data = "";
-        foreach ($this->_elements as $element) {
-            $data .= $element->toDER();
-        }
-        return $data;
-    }
+	/**
+	 *
+	 * @see \ASN1\Element::_encodedContentDER()
+	 * @return string
+	 */
+	protected function _encodedContentDER(): string
+	{
+		$data = "";
+		foreach ($this->_elements as $element) {
+			$data .= $element->toDER();
+		}
+		return $data;
+	}
     
-    /**
-     *
-     * {@inheritdoc}
-     * @see \ASN1\Element::_decodeFromDER()
-     * @return self
-     */
-    protected static function _decodeFromDER(Identifier $identifier,
-        string $data, int &$offset): ElementBase
-    {
-        if (!$identifier->isConstructed()) {
-            throw new DecodeException(
-                "Structured element must have constructed bit set.");
-        }
-        $idx = $offset;
-        $length = Length::expectFromDER($data, $idx);
-        if ($length->isIndefinite()) {
-            $type = self::_decodeIndefiniteLength($data, $idx);
-        } else {
-            $type = self::_decodeDefiniteLength($data, $idx,
-                $length->intLength());
-        }
-        $offset = $idx;
-        return $type;
-    }
+	/**
+	 *
+	 * {@inheritdoc}
+	 * @see \ASN1\Element::_decodeFromDER()
+	 * @return self
+	 */
+	protected static function _decodeFromDER(Identifier $identifier,
+		string $data, int &$offset): ElementBase
+	{
+		if (!$identifier->isConstructed()) {
+			throw new DecodeException(
+				"Structured element must have constructed bit set.");
+		}
+		$idx = $offset;
+		$length = Length::expectFromDER($data, $idx);
+		if ($length->isIndefinite()) {
+			$type = self::_decodeIndefiniteLength($data, $idx);
+		} else {
+			$type = self::_decodeDefiniteLength($data, $idx,
+				$length->intLength());
+		}
+		$offset = $idx;
+		return $type;
+	}
     
-    /**
-     * Decode elements for a definite length.
-     *
-     * @param string $data DER data
-     * @param int $offset Offset to data
-     * @param int $length Number of bytes to decode
-     * @throws DecodeException
-     * @return ElementBase
-     */
-    private static function _decodeDefiniteLength(string $data, int &$offset,
-        int $length): ElementBase
-    {
-        $idx = $offset;
-        $end = $idx + $length;
-        $elements = [];
-        while ($idx < $end) {
-            $elements[] = Element::fromDER($data, $idx);
-            // check that element didn't overflow length
-            if ($idx > $end) {
-                throw new DecodeException(
-                    "Structure's content overflows length.");
-            }
-        }
-        $offset = $idx;
-        // return instance by static late binding
-        return new static(...$elements);
-    }
+	/**
+	 * Decode elements for a definite length.
+	 *
+	 * @param string $data DER data
+	 * @param int $offset Offset to data
+	 * @param int $length Number of bytes to decode
+	 * @throws DecodeException
+	 * @return ElementBase
+	 */
+	private static function _decodeDefiniteLength(string $data, int &$offset,
+		int $length): ElementBase
+	{
+		$idx = $offset;
+		$end = $idx + $length;
+		$elements = [];
+		while ($idx < $end) {
+			$elements[] = Element::fromDER($data, $idx);
+			// check that element didn't overflow length
+			if ($idx > $end) {
+				throw new DecodeException(
+					"Structure's content overflows length.");
+			}
+		}
+		$offset = $idx;
+		// return instance by static late binding
+		return new static(...$elements);
+	}
     
-    /**
-     * Decode elements for an indefinite length.
-     *
-     * @param string $data DER data
-     * @param int $offset Offset to data
-     * @throws DecodeException
-     * @return ElementBase
-     */
-    private static function _decodeIndefiniteLength(string $data, int &$offset): ElementBase
-    {
-        $idx = $offset;
-        $elements = [];
-        $end = strlen($data);
-        while (true) {
-            if ($idx >= $end) {
-                throw new DecodeException(
-                    'Unexpected end of data while decoding indefinite length structure.');
-            }
-            $el = Element::fromDER($data, $idx);
-            if ($el->isType(self::TYPE_EOC)) {
-                break;
-            }
-            $elements[] = $el;
-        }
-        $offset = $idx;
-        $type = new static(...$elements);
-        $type->_indefiniteLength = true;
-        return $type;
-    }
+	/**
+	 * Decode elements for an indefinite length.
+	 *
+	 * @param string $data DER data
+	 * @param int $offset Offset to data
+	 * @throws DecodeException
+	 * @return ElementBase
+	 */
+	private static function _decodeIndefiniteLength(string $data, int &$offset): ElementBase
+	{
+		$idx = $offset;
+		$elements = [];
+		$end = strlen($data);
+		while (true) {
+			if ($idx >= $end) {
+				throw new DecodeException(
+					'Unexpected end of data while decoding indefinite length structure.');
+			}
+			$el = Element::fromDER($data, $idx);
+			if ($el->isType(self::TYPE_EOC)) {
+				break;
+			}
+			$elements[] = $el;
+		}
+		$offset = $idx;
+		$type = new static(...$elements);
+		$type->_indefiniteLength = true;
+		return $type;
+	}
     
-    /**
-     * Explode DER structure to DER encoded components that it contains.
-     *
-     * @param string $data
-     * @throws DecodeException
-     * @return string[]
-     */
-    public static function explodeDER(string $data): array
-    {
-        $offset = 0;
-        $identifier = Identifier::fromDER($data, $offset);
-        if (!$identifier->isConstructed()) {
-            throw new DecodeException("Element is not constructed.");
-        }
-        $length = Length::expectFromDER($data, $offset);
-        if ($length->isIndefinite()) {
-            throw new DecodeException(
-                'Explode not implemented for indefinite length encoding.');
-        }
-        $end = $offset + $length->intLength();
-        $parts = [];
-        while ($offset < $end) {
-            // start of the element
-            $idx = $offset;
-            // skip identifier
-            Identifier::fromDER($data, $offset);
-            // decode element length
-            $length = Length::expectFromDER($data, $offset)->intLength();
-            // extract der encoding of the element
-            $parts[] = substr($data, $idx, $offset - $idx + $length);
-            // update offset over content
-            $offset += $length;
-        }
-        return $parts;
-    }
+	/**
+	 * Explode DER structure to DER encoded components that it contains.
+	 *
+	 * @param string $data
+	 * @throws DecodeException
+	 * @return string[]
+	 */
+	public static function explodeDER(string $data): array
+	{
+		$offset = 0;
+		$identifier = Identifier::fromDER($data, $offset);
+		if (!$identifier->isConstructed()) {
+			throw new DecodeException("Element is not constructed.");
+		}
+		$length = Length::expectFromDER($data, $offset);
+		if ($length->isIndefinite()) {
+			throw new DecodeException(
+				'Explode not implemented for indefinite length encoding.');
+		}
+		$end = $offset + $length->intLength();
+		$parts = [];
+		while ($offset < $end) {
+			// start of the element
+			$idx = $offset;
+			// skip identifier
+			Identifier::fromDER($data, $offset);
+			// decode element length
+			$length = Length::expectFromDER($data, $offset)->intLength();
+			// extract der encoding of the element
+			$parts[] = substr($data, $idx, $offset - $idx + $length);
+			// update offset over content
+			$offset += $length;
+		}
+		return $parts;
+	}
     
-    /**
-     * Get self with an element at the given index replaced by another.
-     *
-     * @param int $idx Element index
-     * @param Element $el New element to insert into the structure
-     * @throws \OutOfBoundsException
-     * @return self
-     */
-    public function withReplaced(int $idx, Element $el): self
-    {
-        if (!isset($this->_elements[$idx])) {
-            throw new \OutOfBoundsException(
-                "Structure doesn't have element at index $idx.");
-        }
-        $obj = clone $this;
-        $obj->_elements[$idx] = $el;
-        return $obj;
-    }
+	/**
+	 * Get self with an element at the given index replaced by another.
+	 *
+	 * @param int $idx Element index
+	 * @param Element $el New element to insert into the structure
+	 * @throws \OutOfBoundsException
+	 * @return self
+	 */
+	public function withReplaced(int $idx, Element $el): self
+	{
+		if (!isset($this->_elements[$idx])) {
+			throw new \OutOfBoundsException(
+				"Structure doesn't have element at index $idx.");
+		}
+		$obj = clone $this;
+		$obj->_elements[$idx] = $el;
+		return $obj;
+	}
     
-    /**
-     * Get self with an element inserted before the given index.
-     *
-     * @param int $idx Element index
-     * @param Element $el New element to insert into the structure
-     * @throws \OutOfBoundsException
-     * @return self
-     */
-    public function withInserted(int $idx, Element $el): self
-    {
-        if (count($this->_elements) < $idx || $idx < 0) {
-            throw new \OutOfBoundsException("Index $idx is out of bounds.");
-        }
-        $obj = clone $this;
-        array_splice($obj->_elements, $idx, 0, [$el]);
-        return $obj;
-    }
+	/**
+	 * Get self with an element inserted before the given index.
+	 *
+	 * @param int $idx Element index
+	 * @param Element $el New element to insert into the structure
+	 * @throws \OutOfBoundsException
+	 * @return self
+	 */
+	public function withInserted(int $idx, Element $el): self
+	{
+		if (count($this->_elements) < $idx || $idx < 0) {
+			throw new \OutOfBoundsException("Index $idx is out of bounds.");
+		}
+		$obj = clone $this;
+		array_splice($obj->_elements, $idx, 0, [$el]);
+		return $obj;
+	}
     
-    /**
-     * Get self with an element appended to the end.
-     *
-     * @param Element $el Element to insert into the structure
-     * @return self
-     */
-    public function withAppended(Element $el): self
-    {
-        $obj = clone $this;
-        array_push($obj->_elements, $el);
-        return $obj;
-    }
+	/**
+	 * Get self with an element appended to the end.
+	 *
+	 * @param Element $el Element to insert into the structure
+	 * @return self
+	 */
+	public function withAppended(Element $el): self
+	{
+		$obj = clone $this;
+		array_push($obj->_elements, $el);
+		return $obj;
+	}
     
-    /**
-     * Get self with an element prepended in the beginning.
-     *
-     * @param Element $el Element to insert into the structure
-     * @return self
-     */
-    public function withPrepended(Element $el): self
-    {
-        $obj = clone $this;
-        array_unshift($obj->_elements, $el);
-        return $obj;
-    }
+	/**
+	 * Get self with an element prepended in the beginning.
+	 *
+	 * @param Element $el Element to insert into the structure
+	 * @return self
+	 */
+	public function withPrepended(Element $el): self
+	{
+		$obj = clone $this;
+		array_unshift($obj->_elements, $el);
+		return $obj;
+	}
     
-    /**
-     * Get self with an element at the given index removed.
-     *
-     * @param int $idx Element index
-     * @throws \OutOfBoundsException
-     * @return self
-     */
-    public function withoutElement(int $idx): self
-    {
-        if (!isset($this->_elements[$idx])) {
-            throw new \OutOfBoundsException(
-                "Structure doesn't have element at index $idx.");
-        }
-        $obj = clone $this;
-        array_splice($obj->_elements, $idx, 1);
-        return $obj;
-    }
+	/**
+	 * Get self with an element at the given index removed.
+	 *
+	 * @param int $idx Element index
+	 * @throws \OutOfBoundsException
+	 * @return self
+	 */
+	public function withoutElement(int $idx): self
+	{
+		if (!isset($this->_elements[$idx])) {
+			throw new \OutOfBoundsException(
+				"Structure doesn't have element at index $idx.");
+		}
+		$obj = clone $this;
+		array_splice($obj->_elements, $idx, 1);
+		return $obj;
+	}
     
-    /**
-     * Get elements in the structure.
-     *
-     * @return UnspecifiedType[]
-     */
-    public function elements(): array
-    {
-        if (!isset($this->_unspecifiedTypes)) {
-            $this->_unspecifiedTypes = array_map(
-                function (Element $el) {
-                    return new UnspecifiedType($el);
-                }, $this->_elements);
-        }
-        return $this->_unspecifiedTypes;
-    }
+	/**
+	 * Get elements in the structure.
+	 *
+	 * @return UnspecifiedType[]
+	 */
+	public function elements(): array
+	{
+		if (!isset($this->_unspecifiedTypes)) {
+			$this->_unspecifiedTypes = array_map(
+				function (Element $el) {
+					return new UnspecifiedType($el);
+				}, $this->_elements);
+		}
+		return $this->_unspecifiedTypes;
+	}
     
-    /**
-     * Check whether the structure has an element at the given index, optionally
-     * satisfying given tag expectation.
-     *
-     * @param int $idx Index 0..n
-     * @param int|null $expectedTag Optional type tag expectation
-     * @return bool
-     */
-    public function has(int $idx, $expectedTag = null): bool
-    {
-        if (!isset($this->_elements[$idx])) {
-            return false;
-        }
-        if (isset($expectedTag)) {
-            if (!$this->_elements[$idx]->isType($expectedTag)) {
-                return false;
-            }
-        }
-        return true;
-    }
+	/**
+	 * Check whether the structure has an element at the given index, optionally
+	 * satisfying given tag expectation.
+	 *
+	 * @param int $idx Index 0..n
+	 * @param int|null $expectedTag Optional type tag expectation
+	 * @return bool
+	 */
+	public function has(int $idx, $expectedTag = null): bool
+	{
+		if (!isset($this->_elements[$idx])) {
+			return false;
+		}
+		if (isset($expectedTag)) {
+			if (!$this->_elements[$idx]->isType($expectedTag)) {
+				return false;
+			}
+		}
+		return true;
+	}
     
-    /**
-     * Get the element at the given index, optionally checking that the element
-     * has a given tag.
-     *
-     * <strong>NOTE!</strong> Expectation checking is deprecated and should be
-     * done with <code>UnspecifiedType</code>.
-     *
-     * @param int $idx Index 0..n
-     * @param int|null $expectedTag Optional type tag expectation
-     * @throws \OutOfBoundsException If element doesn't exists
-     * @throws \UnexpectedValueException If expectation fails
-     * @return UnspecifiedType
-     */
-    public function at(int $idx, $expectedTag = null): UnspecifiedType
-    {
-        if (!isset($this->_elements[$idx])) {
-            throw new \OutOfBoundsException(
-                "Structure doesn't have an element at index $idx.");
-        }
-        $element = $this->_elements[$idx];
-        if (isset($expectedTag)) {
-            $element->expectType($expectedTag);
-        }
-        return new UnspecifiedType($element);
-    }
+	/**
+	 * Get the element at the given index, optionally checking that the element
+	 * has a given tag.
+	 *
+	 * <strong>NOTE!</strong> Expectation checking is deprecated and should be
+	 * done with <code>UnspecifiedType</code>.
+	 *
+	 * @param int $idx Index 0..n
+	 * @param int|null $expectedTag Optional type tag expectation
+	 * @throws \OutOfBoundsException If element doesn't exists
+	 * @throws \UnexpectedValueException If expectation fails
+	 * @return UnspecifiedType
+	 */
+	public function at(int $idx, $expectedTag = null): UnspecifiedType
+	{
+		if (!isset($this->_elements[$idx])) {
+			throw new \OutOfBoundsException(
+				"Structure doesn't have an element at index $idx.");
+		}
+		$element = $this->_elements[$idx];
+		if (isset($expectedTag)) {
+			$element->expectType($expectedTag);
+		}
+		return new UnspecifiedType($element);
+	}
     
-    /**
-     * Check whether the structure contains a context specific element with a
-     * given tag.
-     *
-     * @param int $tag Tag number
-     * @return bool
-     */
-    public function hasTagged(int $tag): bool
-    {
-        // lazily build lookup map
-        if (!isset($this->_taggedMap)) {
-            $this->_taggedMap = [];
-            foreach ($this->_elements as $element) {
-                if ($element->isTagged()) {
-                    $this->_taggedMap[$element->tag()] = $element;
-                }
-            }
-        }
-        return isset($this->_taggedMap[$tag]);
-    }
+	/**
+	 * Check whether the structure contains a context specific element with a
+	 * given tag.
+	 *
+	 * @param int $tag Tag number
+	 * @return bool
+	 */
+	public function hasTagged(int $tag): bool
+	{
+		// lazily build lookup map
+		if (!isset($this->_taggedMap)) {
+			$this->_taggedMap = [];
+			foreach ($this->_elements as $element) {
+				if ($element->isTagged()) {
+					$this->_taggedMap[$element->tag()] = $element;
+				}
+			}
+		}
+		return isset($this->_taggedMap[$tag]);
+	}
     
-    /**
-     * Get a context specific element tagged with a given tag.
-     *
-     * @param int $tag
-     * @throws \LogicException If tag doesn't exists
-     * @return TaggedType
-     */
-    public function getTagged(int $tag): TaggedType
-    {
-        if (!$this->hasTagged($tag)) {
-            throw new \LogicException("No tagged element for tag $tag.");
-        }
-        return $this->_taggedMap[$tag];
-    }
+	/**
+	 * Get a context specific element tagged with a given tag.
+	 *
+	 * @param int $tag
+	 * @throws \LogicException If tag doesn't exists
+	 * @return TaggedType
+	 */
+	public function getTagged(int $tag): TaggedType
+	{
+		if (!$this->hasTagged($tag)) {
+			throw new \LogicException("No tagged element for tag $tag.");
+		}
+		return $this->_taggedMap[$tag];
+	}
     
-    /**
-     *
-     * @see \Countable::count()
-     * @return int
-     */
-    public function count(): int
-    {
-        return count($this->_elements);
-    }
+	/**
+	 *
+	 * @see \Countable::count()
+	 * @return int
+	 */
+	public function count(): int
+	{
+		return count($this->_elements);
+	}
     
-    /**
-     * Get an iterator for the UnspecifiedElement objects.
-     *
-     * @see \IteratorAggregate::getIterator()
-     * @return \ArrayIterator
-     */
-    public function getIterator(): \ArrayIterator
-    {
-        return new \ArrayIterator($this->elements());
-    }
+	/**
+	 * Get an iterator for the UnspecifiedElement objects.
+	 *
+	 * @see \IteratorAggregate::getIterator()
+	 * @return \ArrayIterator
+	 */
+	public function getIterator(): \ArrayIterator
+	{
+		return new \ArrayIterator($this->elements());
+	}
 }

lib/ASN1/Type/Primitive/EOC.php

Indentation +34 added lines, -34 removed lines

@@ -16,41 +16,41 @@
  */
 class EOC extends Element
 {
-    use UniversalClass;
-    use PrimitiveType;
+	use UniversalClass;
+	use PrimitiveType;
     
-    /**
-     * Constructor.
-     */
-    public function __construct()
-    {
-        $this->_typeTag = self::TYPE_EOC;
-    }
+	/**
+	 * Constructor.
+	 */
+	public function __construct()
+	{
+		$this->_typeTag = self::TYPE_EOC;
+	}
     
-    /**
-     *
-     * {@inheritdoc}
-     */
-    protected function _encodedContentDER(): string
-    {
-        return '';
-    }
+	/**
+	 *
+	 * {@inheritdoc}
+	 */
+	protected function _encodedContentDER(): string
+	{
+		return '';
+	}
     
-    /**
-     *
-     * {@inheritdoc}
-     * @return self
-     */
-    protected static function _decodeFromDER(Identifier $identifier,
-        string $data, int &$offset): ElementBase
-    {
-        $idx = $offset;
-        if (!$identifier->isPrimitive()) {
-            throw new DecodeException("EOC value must be primitive.");
-        }
-        // EOC type has always zero length
-        Length::expectFromDER($data, $idx, 0);
-        $offset = $idx;
-        return new self();
-    }
+	/**
+	 *
+	 * {@inheritdoc}
+	 * @return self
+	 */
+	protected static function _decodeFromDER(Identifier $identifier,
+		string $data, int &$offset): ElementBase
+	{
+		$idx = $offset;
+		if (!$identifier->isPrimitive()) {
+			throw new DecodeException("EOC value must be primitive.");
+		}
+		// EOC type has always zero length
+		Length::expectFromDER($data, $idx, 0);
+		$offset = $idx;
+		return new self();
+	}
 }

Spacing +1 added lines, -1 removed lines

@@ -1,6 +1,6 @@
 <?php
 
-declare(strict_types = 1);
+declare(strict_types=1);
 
 namespace ASN1\Type\Primitive;
 

lib/ASN1/Type/Tagged/DERTaggedType.php

Indentation +138 added lines, -138 removed lines

@@ -21,154 +21,154 @@
  * May be encoded back to complete DER encoding.
  */
 class DERTaggedType extends TaggedType implements 
-    ExplicitTagging,
-    ImplicitTagging
+	ExplicitTagging,
+	ImplicitTagging
 {
-    /**
-     * Identifier.
-     *
-     * @var Identifier
-     */
-    private $_identifier;
+	/**
+	 * Identifier.
+	 *
+	 * @var Identifier
+	 */
+	private $_identifier;
     
-    /**
-     * DER data.
-     *
-     * @var string
-     */
-    private $_data;
+	/**
+	 * DER data.
+	 *
+	 * @var string
+	 */
+	private $_data;
     
-    /**
-     * Offset to next byte after identifier.
-     *
-     * @var int
-     */
-    private $_offset;
+	/**
+	 * Offset to next byte after identifier.
+	 *
+	 * @var int
+	 */
+	private $_offset;
     
-    /**
-     * Offset to content.
-     *
-     * @var int
-     */
-    private $_valueOffset;
+	/**
+	 * Offset to content.
+	 *
+	 * @var int
+	 */
+	private $_valueOffset;
     
-    /**
-     * Length of the content.
-     *
-     * @var int
-     */
-    private $_valueLength;
+	/**
+	 * Length of the content.
+	 *
+	 * @var int
+	 */
+	private $_valueLength;
     
-    /**
-     * Constructor.
-     *
-     * @param Identifier $identifier Pre-parsed identifier
-     * @param string $data DER data
-     * @param int $offset Offset to next byte after identifier
-     * @param int $value_offset Offset to content
-     * @param int $value_length Content length
-     */
-    public function __construct(Identifier $identifier, string $data,
-        int $offset, int $value_offset, int $value_length,
-        bool $indefinite_length)
-    {
-        $this->_identifier = $identifier;
-        $this->_data = $data;
-        $this->_offset = $offset;
-        $this->_valueOffset = $value_offset;
-        $this->_valueLength = $value_length;
-        $this->_indefiniteLength = $indefinite_length;
-        $this->_typeTag = $identifier->intTag();
-    }
+	/**
+	 * Constructor.
+	 *
+	 * @param Identifier $identifier Pre-parsed identifier
+	 * @param string $data DER data
+	 * @param int $offset Offset to next byte after identifier
+	 * @param int $value_offset Offset to content
+	 * @param int $value_length Content length
+	 */
+	public function __construct(Identifier $identifier, string $data,
+		int $offset, int $value_offset, int $value_length,
+		bool $indefinite_length)
+	{
+		$this->_identifier = $identifier;
+		$this->_data = $data;
+		$this->_offset = $offset;
+		$this->_valueOffset = $value_offset;
+		$this->_valueLength = $value_length;
+		$this->_indefiniteLength = $indefinite_length;
+		$this->_typeTag = $identifier->intTag();
+	}
     
-    /**
-     *
-     * {@inheritdoc}
-     */
-    protected static function _decodeFromDER(Identifier $identifier,
-        string $data, int &$offset): ElementBase
-    {
-        $idx = $offset;
-        $length = Length::expectFromDER($data, $idx);
-        // offset to inner value
-        $value_offset = $idx;
-        if ($length->isIndefinite()) {
-            if ($identifier->isPrimitive()) {
-                throw new DecodeException(
-                    'Primitive type with indefinite length is not supported.');
-            }
-            while (!Element::fromDER($data, $idx)->isType(self::TYPE_EOC));
-            // EOC consists of two octets.
-            $value_length = $idx - $value_offset - 2;
-        } else {
-            $value_length = $length->intLength();
-            $idx += $value_length;
-        }
-        // late static binding since ApplicationType and PrivateType extend this class
-        $type = new static($identifier, $data, $offset, $value_offset,
-            $value_length, $length->isIndefinite());
-        $offset = $idx;
-        return $type;
-    }
+	/**
+	 *
+	 * {@inheritdoc}
+	 */
+	protected static function _decodeFromDER(Identifier $identifier,
+		string $data, int &$offset): ElementBase
+	{
+		$idx = $offset;
+		$length = Length::expectFromDER($data, $idx);
+		// offset to inner value
+		$value_offset = $idx;
+		if ($length->isIndefinite()) {
+			if ($identifier->isPrimitive()) {
+				throw new DecodeException(
+					'Primitive type with indefinite length is not supported.');
+			}
+			while (!Element::fromDER($data, $idx)->isType(self::TYPE_EOC));
+			// EOC consists of two octets.
+			$value_length = $idx - $value_offset - 2;
+		} else {
+			$value_length = $length->intLength();
+			$idx += $value_length;
+		}
+		// late static binding since ApplicationType and PrivateType extend this class
+		$type = new static($identifier, $data, $offset, $value_offset,
+			$value_length, $length->isIndefinite());
+		$offset = $idx;
+		return $type;
+	}
     
-    /**
-     *
-     * @see \ASN1\Element::typeClass()
-     * @return int
-     */
-    public function typeClass(): int
-    {
-        return $this->_identifier->typeClass();
-    }
+	/**
+	 *
+	 * @see \ASN1\Element::typeClass()
+	 * @return int
+	 */
+	public function typeClass(): int
+	{
+		return $this->_identifier->typeClass();
+	}
     
-    /**
-     *
-     * @see \ASN1\Element::isConstructed()
-     * @return bool
-     */
-    public function isConstructed(): bool
-    {
-        return $this->_identifier->isConstructed();
-    }
+	/**
+	 *
+	 * @see \ASN1\Element::isConstructed()
+	 * @return bool
+	 */
+	public function isConstructed(): bool
+	{
+		return $this->_identifier->isConstructed();
+	}
     
-    /**
-     *
-     * @see \ASN1\Element::_encodedContentDER()
-     * @return string
-     */
-    protected function _encodedContentDER(): string
-    {
-        return substr($this->_data, $this->_valueOffset, $this->_valueLength);
-    }
+	/**
+	 *
+	 * @see \ASN1\Element::_encodedContentDER()
+	 * @return string
+	 */
+	protected function _encodedContentDER(): string
+	{
+		return substr($this->_data, $this->_valueOffset, $this->_valueLength);
+	}
     
-    /**
-     *
-     * {@inheritdoc}
-     * @see \ASN1\Type\Tagged\ImplicitTagging::implicit()
-     * @return UnspecifiedType
-     */
-    public function implicit(int $tag, int $class = Identifier::CLASS_UNIVERSAL): UnspecifiedType
-    {
-        $identifier = $this->_identifier->withClass($class)->withTag($tag);
-        $cls = self::_determineImplClass($identifier);
-        $idx = $this->_offset;
-        /** @var \ASN1\Feature\ElementBase $element */
-        $element = $cls::_decodeFromDER($identifier, $this->_data, $idx);
-        return $element->asUnspecified();
-    }
+	/**
+	 *
+	 * {@inheritdoc}
+	 * @see \ASN1\Type\Tagged\ImplicitTagging::implicit()
+	 * @return UnspecifiedType
+	 */
+	public function implicit(int $tag, int $class = Identifier::CLASS_UNIVERSAL): UnspecifiedType
+	{
+		$identifier = $this->_identifier->withClass($class)->withTag($tag);
+		$cls = self::_determineImplClass($identifier);
+		$idx = $this->_offset;
+		/** @var \ASN1\Feature\ElementBase $element */
+		$element = $cls::_decodeFromDER($identifier, $this->_data, $idx);
+		return $element->asUnspecified();
+	}
     
-    /**
-     *
-     * @see \ASN1\Type\Tagged\ExplicitTagging::explicit()
-     * @return UnspecifiedType
-     */
-    public function explicit($expectedTag = null): UnspecifiedType
-    {
-        $idx = $this->_valueOffset;
-        $element = Element::fromDER($this->_data, $idx);
-        if (isset($expectedTag)) {
-            $element->expectType($expectedTag);
-        }
-        return $element->asUnspecified();
-    }
+	/**
+	 *
+	 * @see \ASN1\Type\Tagged\ExplicitTagging::explicit()
+	 * @return UnspecifiedType
+	 */
+	public function explicit($expectedTag = null): UnspecifiedType
+	{
+		$idx = $this->_valueOffset;
+		$element = Element::fromDER($this->_data, $idx);
+		if (isset($expectedTag)) {
+			$element->expectType($expectedTag);
+		}
+		return $element->asUnspecified();
+	}
 }

lib/ASN1/Type/TaggedType.php

Indentation +73 added lines, -73 removed lines

@@ -15,81 +15,81 @@
  */
 abstract class TaggedType extends Element
 {
-    /**
-     *
-     * {@inheritdoc}
-     */
-    protected static function _decodeFromDER(Identifier $identifier,
-        string $data, int &$offset): ElementBase
-    {
-        return DERTaggedType::_decodeFromDER($identifier, $data, $offset);
-    }
+	/**
+	 *
+	 * {@inheritdoc}
+	 */
+	protected static function _decodeFromDER(Identifier $identifier,
+		string $data, int &$offset): ElementBase
+	{
+		return DERTaggedType::_decodeFromDER($identifier, $data, $offset);
+	}
     
-    /**
-     * Check whether element supports explicit tagging.
-     *
-     * @param int|null $expectedTag Optional outer tag expectation
-     * @throws \UnexpectedValueException If expectation fails
-     * @return ExplicitTagging
-     */
-    public function expectExplicit($expectedTag = null): ExplicitTagging
-    {
-        $el = $this;
-        if (!$el instanceof ExplicitTagging) {
-            throw new \UnexpectedValueException(
-                "Element doesn't implement explicit tagging.");
-        }
-        if (isset($expectedTag)) {
-            $el->expectTagged($expectedTag);
-        }
-        return $el;
-    }
+	/**
+	 * Check whether element supports explicit tagging.
+	 *
+	 * @param int|null $expectedTag Optional outer tag expectation
+	 * @throws \UnexpectedValueException If expectation fails
+	 * @return ExplicitTagging
+	 */
+	public function expectExplicit($expectedTag = null): ExplicitTagging
+	{
+		$el = $this;
+		if (!$el instanceof ExplicitTagging) {
+			throw new \UnexpectedValueException(
+				"Element doesn't implement explicit tagging.");
+		}
+		if (isset($expectedTag)) {
+			$el->expectTagged($expectedTag);
+		}
+		return $el;
+	}
     
-    /**
-     * Get the wrapped inner element employing explicit tagging.
-     *
-     * @param int|null $expectedTag Optional outer tag expectation
-     * @throws \UnexpectedValueException If expectation fails
-     * @return UnspecifiedType
-     */
-    public function asExplicit($expectedTag = null): UnspecifiedType
-    {
-        return $this->expectExplicit($expectedTag)->explicit();
-    }
+	/**
+	 * Get the wrapped inner element employing explicit tagging.
+	 *
+	 * @param int|null $expectedTag Optional outer tag expectation
+	 * @throws \UnexpectedValueException If expectation fails
+	 * @return UnspecifiedType
+	 */
+	public function asExplicit($expectedTag = null): UnspecifiedType
+	{
+		return $this->expectExplicit($expectedTag)->explicit();
+	}
     
-    /**
-     * Check whether element supports implicit tagging.
-     *
-     * @param int|null $expectedTag Optional outer tag expectation
-     * @throws \UnexpectedValueException If expectation fails
-     * @return ImplicitTagging
-     */
-    public function expectImplicit($expectedTag = null): ImplicitTagging
-    {
-        $el = $this;
-        if (!$el instanceof ImplicitTagging) {
-            throw new \UnexpectedValueException(
-                "Element doesn't implement implicit tagging.");
-        }
-        if (isset($expectedTag)) {
-            $el->expectTagged($expectedTag);
-        }
-        return $el;
-    }
+	/**
+	 * Check whether element supports implicit tagging.
+	 *
+	 * @param int|null $expectedTag Optional outer tag expectation
+	 * @throws \UnexpectedValueException If expectation fails
+	 * @return ImplicitTagging
+	 */
+	public function expectImplicit($expectedTag = null): ImplicitTagging
+	{
+		$el = $this;
+		if (!$el instanceof ImplicitTagging) {
+			throw new \UnexpectedValueException(
+				"Element doesn't implement implicit tagging.");
+		}
+		if (isset($expectedTag)) {
+			$el->expectTagged($expectedTag);
+		}
+		return $el;
+	}
     
-    /**
-     * Get the wrapped inner element employing implicit tagging.
-     *
-     * @param int $tag Type tag of the inner element
-     * @param int|null $expectedTag Optional outer tag expectation
-     * @param int $expectedClass Optional inner type class expectation
-     * @throws \UnexpectedValueException If expectation fails
-     * @return UnspecifiedType
-     */
-    public function asImplicit(int $tag, $expectedTag = null,
-        int $expectedClass = Identifier::CLASS_UNIVERSAL): UnspecifiedType
-    {
-        return $this->expectImplicit($expectedTag)->implicit($tag,
-            $expectedClass);
-    }
+	/**
+	 * Get the wrapped inner element employing implicit tagging.
+	 *
+	 * @param int $tag Type tag of the inner element
+	 * @param int|null $expectedTag Optional outer tag expectation
+	 * @param int $expectedClass Optional inner type class expectation
+	 * @throws \UnexpectedValueException If expectation fails
+	 * @return UnspecifiedType
+	 */
+	public function asImplicit(int $tag, $expectedTag = null,
+		int $expectedClass = Identifier::CLASS_UNIVERSAL): UnspecifiedType
+	{
+		return $this->expectImplicit($expectedTag)->implicit($tag,
+			$expectedClass);
+	}
 }

lib/ASN1/Element.php

Indentation +446 added lines, -446 removed lines

@@ -21,477 +21,477 @@
  */
 abstract class Element implements ElementBase
 {
-    // Universal type tags
-    const TYPE_EOC = 0x00;
-    const TYPE_BOOLEAN = 0x01;
-    const TYPE_INTEGER = 0x02;
-    const TYPE_BIT_STRING = 0x03;
-    const TYPE_OCTET_STRING = 0x04;
-    const TYPE_NULL = 0x05;
-    const TYPE_OBJECT_IDENTIFIER = 0x06;
-    const TYPE_OBJECT_DESCRIPTOR = 0x07;
-    const TYPE_EXTERNAL = 0x08;
-    const TYPE_REAL = 0x09;
-    const TYPE_ENUMERATED = 0x0a;
-    const TYPE_EMBEDDED_PDV = 0x0b;
-    const TYPE_UTF8_STRING = 0x0c;
-    const TYPE_RELATIVE_OID = 0x0d;
-    const TYPE_SEQUENCE = 0x10;
-    const TYPE_SET = 0x11;
-    const TYPE_NUMERIC_STRING = 0x12;
-    const TYPE_PRINTABLE_STRING = 0x13;
-    const TYPE_T61_STRING = 0x14;
-    const TYPE_VIDEOTEX_STRING = 0x15;
-    const TYPE_IA5_STRING = 0x16;
-    const TYPE_UTC_TIME = 0x17;
-    const TYPE_GENERALIZED_TIME = 0x18;
-    const TYPE_GRAPHIC_STRING = 0x19;
-    const TYPE_VISIBLE_STRING = 0x1a;
-    const TYPE_GENERAL_STRING = 0x1b;
-    const TYPE_UNIVERSAL_STRING = 0x1c;
-    const TYPE_CHARACTER_STRING = 0x1d;
-    const TYPE_BMP_STRING = 0x1e;
+	// Universal type tags
+	const TYPE_EOC = 0x00;
+	const TYPE_BOOLEAN = 0x01;
+	const TYPE_INTEGER = 0x02;
+	const TYPE_BIT_STRING = 0x03;
+	const TYPE_OCTET_STRING = 0x04;
+	const TYPE_NULL = 0x05;
+	const TYPE_OBJECT_IDENTIFIER = 0x06;
+	const TYPE_OBJECT_DESCRIPTOR = 0x07;
+	const TYPE_EXTERNAL = 0x08;
+	const TYPE_REAL = 0x09;
+	const TYPE_ENUMERATED = 0x0a;
+	const TYPE_EMBEDDED_PDV = 0x0b;
+	const TYPE_UTF8_STRING = 0x0c;
+	const TYPE_RELATIVE_OID = 0x0d;
+	const TYPE_SEQUENCE = 0x10;
+	const TYPE_SET = 0x11;
+	const TYPE_NUMERIC_STRING = 0x12;
+	const TYPE_PRINTABLE_STRING = 0x13;
+	const TYPE_T61_STRING = 0x14;
+	const TYPE_VIDEOTEX_STRING = 0x15;
+	const TYPE_IA5_STRING = 0x16;
+	const TYPE_UTC_TIME = 0x17;
+	const TYPE_GENERALIZED_TIME = 0x18;
+	const TYPE_GRAPHIC_STRING = 0x19;
+	const TYPE_VISIBLE_STRING = 0x1a;
+	const TYPE_GENERAL_STRING = 0x1b;
+	const TYPE_UNIVERSAL_STRING = 0x1c;
+	const TYPE_CHARACTER_STRING = 0x1d;
+	const TYPE_BMP_STRING = 0x1e;
     
-    /**
-     * Mapping from universal type tag to implementation class name.
-     *
-     * @internal
-     *
-     * @var array
-     */
-    const MAP_TAG_TO_CLASS = [ /* @formatter:off */
-        self::TYPE_EOC => Primitive\EOC::class,
-        self::TYPE_BOOLEAN => Primitive\Boolean::class,
-        self::TYPE_INTEGER => Primitive\Integer::class,
-        self::TYPE_BIT_STRING => Primitive\BitString::class,
-        self::TYPE_OCTET_STRING => Primitive\OctetString::class,
-        self::TYPE_NULL => Primitive\NullType::class,
-        self::TYPE_OBJECT_IDENTIFIER => Primitive\ObjectIdentifier::class,
-        self::TYPE_OBJECT_DESCRIPTOR => Primitive\ObjectDescriptor::class,
-        self::TYPE_REAL => Primitive\Real::class,
-        self::TYPE_ENUMERATED => Primitive\Enumerated::class,
-        self::TYPE_UTF8_STRING => Primitive\UTF8String::class,
-        self::TYPE_RELATIVE_OID => Primitive\RelativeOID::class,
-        self::TYPE_SEQUENCE => Constructed\Sequence::class,
-        self::TYPE_SET => Constructed\Set::class,
-        self::TYPE_NUMERIC_STRING => Primitive\NumericString::class,
-        self::TYPE_PRINTABLE_STRING => Primitive\PrintableString::class,
-        self::TYPE_T61_STRING => Primitive\T61String::class,
-        self::TYPE_VIDEOTEX_STRING => Primitive\VideotexString::class,
-        self::TYPE_IA5_STRING => Primitive\IA5String::class,
-        self::TYPE_UTC_TIME => Primitive\UTCTime::class,
-        self::TYPE_GENERALIZED_TIME => Primitive\GeneralizedTime::class,
-        self::TYPE_GRAPHIC_STRING => Primitive\GraphicString::class,
-        self::TYPE_VISIBLE_STRING => Primitive\VisibleString::class,
-        self::TYPE_GENERAL_STRING => Primitive\GeneralString::class,
-        self::TYPE_UNIVERSAL_STRING => Primitive\UniversalString::class,
-        self::TYPE_CHARACTER_STRING => Primitive\CharacterString::class,
-        self::TYPE_BMP_STRING => Primitive\BMPString::class
-        /* @formatter:on */
-    ];
+	/**
+	 * Mapping from universal type tag to implementation class name.
+	 *
+	 * @internal
+	 *
+	 * @var array
+	 */
+	const MAP_TAG_TO_CLASS = [ /* @formatter:off */
+		self::TYPE_EOC => Primitive\EOC::class,
+		self::TYPE_BOOLEAN => Primitive\Boolean::class,
+		self::TYPE_INTEGER => Primitive\Integer::class,
+		self::TYPE_BIT_STRING => Primitive\BitString::class,
+		self::TYPE_OCTET_STRING => Primitive\OctetString::class,
+		self::TYPE_NULL => Primitive\NullType::class,
+		self::TYPE_OBJECT_IDENTIFIER => Primitive\ObjectIdentifier::class,
+		self::TYPE_OBJECT_DESCRIPTOR => Primitive\ObjectDescriptor::class,
+		self::TYPE_REAL => Primitive\Real::class,
+		self::TYPE_ENUMERATED => Primitive\Enumerated::class,
+		self::TYPE_UTF8_STRING => Primitive\UTF8String::class,
+		self::TYPE_RELATIVE_OID => Primitive\RelativeOID::class,
+		self::TYPE_SEQUENCE => Constructed\Sequence::class,
+		self::TYPE_SET => Constructed\Set::class,
+		self::TYPE_NUMERIC_STRING => Primitive\NumericString::class,
+		self::TYPE_PRINTABLE_STRING => Primitive\PrintableString::class,
+		self::TYPE_T61_STRING => Primitive\T61String::class,
+		self::TYPE_VIDEOTEX_STRING => Primitive\VideotexString::class,
+		self::TYPE_IA5_STRING => Primitive\IA5String::class,
+		self::TYPE_UTC_TIME => Primitive\UTCTime::class,
+		self::TYPE_GENERALIZED_TIME => Primitive\GeneralizedTime::class,
+		self::TYPE_GRAPHIC_STRING => Primitive\GraphicString::class,
+		self::TYPE_VISIBLE_STRING => Primitive\VisibleString::class,
+		self::TYPE_GENERAL_STRING => Primitive\GeneralString::class,
+		self::TYPE_UNIVERSAL_STRING => Primitive\UniversalString::class,
+		self::TYPE_CHARACTER_STRING => Primitive\CharacterString::class,
+		self::TYPE_BMP_STRING => Primitive\BMPString::class
+		/* @formatter:on */
+	];
     
-    /**
-     * Pseudotype for all string types.
-     *
-     * May be used as an expectation parameter.
-     *
-     * @var int
-     */
-    const TYPE_STRING = -1;
+	/**
+	 * Pseudotype for all string types.
+	 *
+	 * May be used as an expectation parameter.
+	 *
+	 * @var int
+	 */
+	const TYPE_STRING = -1;
     
-    /**
-     * Pseudotype for all time types.
-     *
-     * May be used as an expectation parameter.
-     *
-     * @var int
-     */
-    const TYPE_TIME = -2;
+	/**
+	 * Pseudotype for all time types.
+	 *
+	 * May be used as an expectation parameter.
+	 *
+	 * @var int
+	 */
+	const TYPE_TIME = -2;
     
-    /**
-     * Mapping from universal type tag to human readable name.
-     *
-     * @internal
-     *
-     * @var array
-     */
-    const MAP_TYPE_TO_NAME = [ /* @formatter:off */
-        self::TYPE_EOC => "EOC",
-        self::TYPE_BOOLEAN => "BOOLEAN",
-        self::TYPE_INTEGER => "INTEGER",
-        self::TYPE_BIT_STRING => "BIT STRING",
-        self::TYPE_OCTET_STRING => "OCTET STRING",
-        self::TYPE_NULL => "NULL",
-        self::TYPE_OBJECT_IDENTIFIER => "OBJECT IDENTIFIER",
-        self::TYPE_OBJECT_DESCRIPTOR => "ObjectDescriptor",
-        self::TYPE_EXTERNAL => "EXTERNAL",
-        self::TYPE_REAL => "REAL",
-        self::TYPE_ENUMERATED => "ENUMERATED",
-        self::TYPE_EMBEDDED_PDV => "EMBEDDED PDV",
-        self::TYPE_UTF8_STRING => "UTF8String",
-        self::TYPE_RELATIVE_OID => "RELATIVE-OID",
-        self::TYPE_SEQUENCE => "SEQUENCE",
-        self::TYPE_SET => "SET",
-        self::TYPE_NUMERIC_STRING => "NumericString",
-        self::TYPE_PRINTABLE_STRING => "PrintableString",
-        self::TYPE_T61_STRING => "T61String",
-        self::TYPE_VIDEOTEX_STRING => "VideotexString",
-        self::TYPE_IA5_STRING => "IA5String",
-        self::TYPE_UTC_TIME => "UTCTime",
-        self::TYPE_GENERALIZED_TIME => "GeneralizedTime",
-        self::TYPE_GRAPHIC_STRING => "GraphicString",
-        self::TYPE_VISIBLE_STRING => "VisibleString",
-        self::TYPE_GENERAL_STRING => "GeneralString",
-        self::TYPE_UNIVERSAL_STRING => "UniversalString",
-        self::TYPE_CHARACTER_STRING => "CHARACTER STRING",
-        self::TYPE_BMP_STRING => "BMPString",
-        self::TYPE_STRING => "Any String",
-        self::TYPE_TIME => "Any Time"
-        /* @formatter:on */
-    ];
+	/**
+	 * Mapping from universal type tag to human readable name.
+	 *
+	 * @internal
+	 *
+	 * @var array
+	 */
+	const MAP_TYPE_TO_NAME = [ /* @formatter:off */
+		self::TYPE_EOC => "EOC",
+		self::TYPE_BOOLEAN => "BOOLEAN",
+		self::TYPE_INTEGER => "INTEGER",
+		self::TYPE_BIT_STRING => "BIT STRING",
+		self::TYPE_OCTET_STRING => "OCTET STRING",
+		self::TYPE_NULL => "NULL",
+		self::TYPE_OBJECT_IDENTIFIER => "OBJECT IDENTIFIER",
+		self::TYPE_OBJECT_DESCRIPTOR => "ObjectDescriptor",
+		self::TYPE_EXTERNAL => "EXTERNAL",
+		self::TYPE_REAL => "REAL",
+		self::TYPE_ENUMERATED => "ENUMERATED",
+		self::TYPE_EMBEDDED_PDV => "EMBEDDED PDV",
+		self::TYPE_UTF8_STRING => "UTF8String",
+		self::TYPE_RELATIVE_OID => "RELATIVE-OID",
+		self::TYPE_SEQUENCE => "SEQUENCE",
+		self::TYPE_SET => "SET",
+		self::TYPE_NUMERIC_STRING => "NumericString",
+		self::TYPE_PRINTABLE_STRING => "PrintableString",
+		self::TYPE_T61_STRING => "T61String",
+		self::TYPE_VIDEOTEX_STRING => "VideotexString",
+		self::TYPE_IA5_STRING => "IA5String",
+		self::TYPE_UTC_TIME => "UTCTime",
+		self::TYPE_GENERALIZED_TIME => "GeneralizedTime",
+		self::TYPE_GRAPHIC_STRING => "GraphicString",
+		self::TYPE_VISIBLE_STRING => "VisibleString",
+		self::TYPE_GENERAL_STRING => "GeneralString",
+		self::TYPE_UNIVERSAL_STRING => "UniversalString",
+		self::TYPE_CHARACTER_STRING => "CHARACTER STRING",
+		self::TYPE_BMP_STRING => "BMPString",
+		self::TYPE_STRING => "Any String",
+		self::TYPE_TIME => "Any Time"
+		/* @formatter:on */
+	];
     
-    /**
-     * Element's type tag.
-     *
-     * @var int
-     */
-    protected $_typeTag;
+	/**
+	 * Element's type tag.
+	 *
+	 * @var int
+	 */
+	protected $_typeTag;
     
-    /**
-     * Whether type shall be encoded with indefinite length.
-     *
-     * @var bool
-     */
-    protected $_indefiniteLength = false;
+	/**
+	 * Whether type shall be encoded with indefinite length.
+	 *
+	 * @var bool
+	 */
+	protected $_indefiniteLength = false;
     
-    /**
-     *
-     * @see \ASN1\Feature\ElementBase::typeClass()
-     * @return int
-     */
-    abstract public function typeClass(): int;
+	/**
+	 *
+	 * @see \ASN1\Feature\ElementBase::typeClass()
+	 * @return int
+	 */
+	abstract public function typeClass(): int;
     
-    /**
-     *
-     * @see \ASN1\Feature\ElementBase::isConstructed()
-     * @return bool
-     */
-    abstract public function isConstructed(): bool;
+	/**
+	 *
+	 * @see \ASN1\Feature\ElementBase::isConstructed()
+	 * @return bool
+	 */
+	abstract public function isConstructed(): bool;
     
-    /**
-     * Get the content encoded in DER.
-     *
-     * Returns the DER encoded content without identifier and length header
-     * octets.
-     *
-     * @return string
-     */
-    abstract protected function _encodedContentDER(): string;
+	/**
+	 * Get the content encoded in DER.
+	 *
+	 * Returns the DER encoded content without identifier and length header
+	 * octets.
+	 *
+	 * @return string
+	 */
+	abstract protected function _encodedContentDER(): string;
     
-    /**
-     * Decode type-specific element from DER.
-     *
-     * @param Identifier $identifier Pre-parsed identifier
-     * @param string $data DER data
-     * @param int $offset Offset in data to the next byte after identifier
-     * @throws DecodeException If decoding fails
-     * @return ElementBase
-     */
-    protected static function _decodeFromDER(Identifier $identifier,
-        string $data, int &$offset): ElementBase
-    {
-        throw new \BadMethodCallException(
-            __METHOD__ . " must be implemented in derived class.");
-    }
+	/**
+	 * Decode type-specific element from DER.
+	 *
+	 * @param Identifier $identifier Pre-parsed identifier
+	 * @param string $data DER data
+	 * @param int $offset Offset in data to the next byte after identifier
+	 * @throws DecodeException If decoding fails
+	 * @return ElementBase
+	 */
+	protected static function _decodeFromDER(Identifier $identifier,
+		string $data, int &$offset): ElementBase
+	{
+		throw new \BadMethodCallException(
+			__METHOD__ . " must be implemented in derived class.");
+	}
     
-    /**
-     * Decode element from DER data.
-     *
-     * @param string $data DER encoded data
-     * @param int|null $offset Reference to the variable that contains offset
-     *        into the data where to start parsing. Variable is updated to
-     *        the offset next to the parsed element. If null, start from offset
-     *        0.
-     * @throws DecodeException If decoding fails
-     * @throws \UnexpectedValueException If called in the context of an expected
-     *         type, but decoding yields another type
-     * @return ElementBase
-     */
-    public static function fromDER(string $data, int &$offset = null): ElementBase
-    {
-        $idx = $offset ?? 0;
-        // decode identifier
-        $identifier = Identifier::fromDER($data, $idx);
-        // determine class that implements type specific decoding
-        $cls = self::_determineImplClass($identifier);
-        try {
-            // decode remaining element
-            $element = $cls::_decodeFromDER($identifier, $data, $idx);
-        } catch (\LogicException $e) {
-            // rethrow as a RuntimeException for unified exception handling
-            throw new DecodeException(
-                sprintf("Error while decoding %s.",
-                    self::tagToName($identifier->intTag())), 0, $e);
-        }
-        // if called in the context of a concrete class, check
-        // that decoded type matches the type of a calling class
-        $called_class = get_called_class();
-        if (self::class != $called_class) {
-            if (!$element instanceof $called_class) {
-                throw new \UnexpectedValueException(
-                    sprintf("%s expected, got %s.", $called_class,
-                        get_class($element)));
-            }
-        }
-        // update offset for the caller
-        if (isset($offset)) {
-            $offset = $idx;
-        }
-        return $element;
-    }
+	/**
+	 * Decode element from DER data.
+	 *
+	 * @param string $data DER encoded data
+	 * @param int|null $offset Reference to the variable that contains offset
+	 *        into the data where to start parsing. Variable is updated to
+	 *        the offset next to the parsed element. If null, start from offset
+	 *        0.
+	 * @throws DecodeException If decoding fails
+	 * @throws \UnexpectedValueException If called in the context of an expected
+	 *         type, but decoding yields another type
+	 * @return ElementBase
+	 */
+	public static function fromDER(string $data, int &$offset = null): ElementBase
+	{
+		$idx = $offset ?? 0;
+		// decode identifier
+		$identifier = Identifier::fromDER($data, $idx);
+		// determine class that implements type specific decoding
+		$cls = self::_determineImplClass($identifier);
+		try {
+			// decode remaining element
+			$element = $cls::_decodeFromDER($identifier, $data, $idx);
+		} catch (\LogicException $e) {
+			// rethrow as a RuntimeException for unified exception handling
+			throw new DecodeException(
+				sprintf("Error while decoding %s.",
+					self::tagToName($identifier->intTag())), 0, $e);
+		}
+		// if called in the context of a concrete class, check
+		// that decoded type matches the type of a calling class
+		$called_class = get_called_class();
+		if (self::class != $called_class) {
+			if (!$element instanceof $called_class) {
+				throw new \UnexpectedValueException(
+					sprintf("%s expected, got %s.", $called_class,
+						get_class($element)));
+			}
+		}
+		// update offset for the caller
+		if (isset($offset)) {
+			$offset = $idx;
+		}
+		return $element;
+	}
     
-    /**
-     *
-     * @see \ASN1\Feature\Encodable::toDER()
-     * @return string
-     */
-    public function toDER(): string
-    {
-        $identifier = new Identifier($this->typeClass(),
-            $this->isConstructed() ? Identifier::CONSTRUCTED : Identifier::PRIMITIVE,
-            $this->_typeTag);
-        $content = $this->_encodedContentDER();
-        if ($this->_indefiniteLength) {
-            $length = new Length(0, true);
-            $eoc = new Primitive\EOC();
-            return $identifier->toDER() . $length->toDER() . $content .
-                $eoc->toDER();
-        } else {
-            $length = new Length(strlen($content));
-            return $identifier->toDER() . $length->toDER() . $content;
-        }
-    }
+	/**
+	 *
+	 * @see \ASN1\Feature\Encodable::toDER()
+	 * @return string
+	 */
+	public function toDER(): string
+	{
+		$identifier = new Identifier($this->typeClass(),
+			$this->isConstructed() ? Identifier::CONSTRUCTED : Identifier::PRIMITIVE,
+			$this->_typeTag);
+		$content = $this->_encodedContentDER();
+		if ($this->_indefiniteLength) {
+			$length = new Length(0, true);
+			$eoc = new Primitive\EOC();
+			return $identifier->toDER() . $length->toDER() . $content .
+				$eoc->toDER();
+		} else {
+			$length = new Length(strlen($content));
+			return $identifier->toDER() . $length->toDER() . $content;
+		}
+	}
     
-    /**
-     *
-     * @see \ASN1\Feature\ElementBase::tag()
-     * @return int
-     */
-    public function tag(): int
-    {
-        return $this->_typeTag;
-    }
+	/**
+	 *
+	 * @see \ASN1\Feature\ElementBase::tag()
+	 * @return int
+	 */
+	public function tag(): int
+	{
+		return $this->_typeTag;
+	}
     
-    /**
-     *
-     * @see \ASN1\Feature\ElementBase::isType()
-     * @return bool
-     */
-    public function isType(int $tag): bool
-    {
-        // if element is context specific
-        if ($this->typeClass() == Identifier::CLASS_CONTEXT_SPECIFIC) {
-            return false;
-        }
-        // negative tags identify an abstract pseudotype
-        if ($tag < 0) {
-            return $this->_isPseudoType($tag);
-        }
-        return $this->_isConcreteType($tag);
-    }
+	/**
+	 *
+	 * @see \ASN1\Feature\ElementBase::isType()
+	 * @return bool
+	 */
+	public function isType(int $tag): bool
+	{
+		// if element is context specific
+		if ($this->typeClass() == Identifier::CLASS_CONTEXT_SPECIFIC) {
+			return false;
+		}
+		// negative tags identify an abstract pseudotype
+		if ($tag < 0) {
+			return $this->_isPseudoType($tag);
+		}
+		return $this->_isConcreteType($tag);
+	}
     
-    /**
-     *
-     * @see \ASN1\Feature\ElementBase::expectType()
-     * @return ElementBase
-     */
-    public function expectType(int $tag): ElementBase
-    {
-        if (!$this->isType($tag)) {
-            throw new \UnexpectedValueException(
-                sprintf("%s expected, got %s.", self::tagToName($tag),
-                    $this->_typeDescriptorString()));
-        }
-        return $this;
-    }
+	/**
+	 *
+	 * @see \ASN1\Feature\ElementBase::expectType()
+	 * @return ElementBase
+	 */
+	public function expectType(int $tag): ElementBase
+	{
+		if (!$this->isType($tag)) {
+			throw new \UnexpectedValueException(
+				sprintf("%s expected, got %s.", self::tagToName($tag),
+					$this->_typeDescriptorString()));
+		}
+		return $this;
+	}
     
-    /**
-     * Check whether the element is a concrete type of a given tag.
-     *
-     * @param int $tag
-     * @return bool
-     */
-    private function _isConcreteType(int $tag): bool
-    {
-        // if tag doesn't match
-        if ($this->tag() != $tag) {
-            return false;
-        }
-        // if type is universal check that instance is of a correct class
-        if ($this->typeClass() == Identifier::CLASS_UNIVERSAL) {
-            $cls = self::_determineUniversalImplClass($tag);
-            if (!$this instanceof $cls) {
-                return false;
-            }
-        }
-        return true;
-    }
+	/**
+	 * Check whether the element is a concrete type of a given tag.
+	 *
+	 * @param int $tag
+	 * @return bool
+	 */
+	private function _isConcreteType(int $tag): bool
+	{
+		// if tag doesn't match
+		if ($this->tag() != $tag) {
+			return false;
+		}
+		// if type is universal check that instance is of a correct class
+		if ($this->typeClass() == Identifier::CLASS_UNIVERSAL) {
+			$cls = self::_determineUniversalImplClass($tag);
+			if (!$this instanceof $cls) {
+				return false;
+			}
+		}
+		return true;
+	}
     
-    /**
-     * Check whether the element is a pseudotype.
-     *
-     * @param int $tag
-     * @return bool
-     */
-    private function _isPseudoType(int $tag): bool
-    {
-        switch ($tag) {
-            case self::TYPE_STRING:
-                return $this instanceof StringType;
-            case self::TYPE_TIME:
-                return $this instanceof TimeType;
-        }
-        return false;
-    }
+	/**
+	 * Check whether the element is a pseudotype.
+	 *
+	 * @param int $tag
+	 * @return bool
+	 */
+	private function _isPseudoType(int $tag): bool
+	{
+		switch ($tag) {
+			case self::TYPE_STRING:
+				return $this instanceof StringType;
+			case self::TYPE_TIME:
+				return $this instanceof TimeType;
+		}
+		return false;
+	}
     
-    /**
-     *
-     * @see \ASN1\Feature\ElementBase::isTagged()
-     * @return bool
-     */
-    public function isTagged(): bool
-    {
-        return $this instanceof TaggedType;
-    }
+	/**
+	 *
+	 * @see \ASN1\Feature\ElementBase::isTagged()
+	 * @return bool
+	 */
+	public function isTagged(): bool
+	{
+		return $this instanceof TaggedType;
+	}
     
-    /**
-     *
-     * @see \ASN1\Feature\ElementBase::expectTagged()
-     * @return TaggedType
-     */
-    public function expectTagged($tag = null): TaggedType
-    {
-        if (!$this->isTagged()) {
-            throw new \UnexpectedValueException(
-                sprintf("Context specific element expected, got %s.",
-                    Identifier::classToName($this->typeClass())));
-        }
-        if (isset($tag) && $this->tag() != $tag) {
-            throw new \UnexpectedValueException(
-                sprintf("Tag %d expected, got %d.", $tag, $this->tag()));
-        }
-        return $this;
-    }
+	/**
+	 *
+	 * @see \ASN1\Feature\ElementBase::expectTagged()
+	 * @return TaggedType
+	 */
+	public function expectTagged($tag = null): TaggedType
+	{
+		if (!$this->isTagged()) {
+			throw new \UnexpectedValueException(
+				sprintf("Context specific element expected, got %s.",
+					Identifier::classToName($this->typeClass())));
+		}
+		if (isset($tag) && $this->tag() != $tag) {
+			throw new \UnexpectedValueException(
+				sprintf("Tag %d expected, got %d.", $tag, $this->tag()));
+		}
+		return $this;
+	}
     
-    /**
-     * Whether element has indefinite length.
-     *
-     * @return bool
-     */
-    public function hasIndefiniteLength(): bool
-    {
-        return $this->_indefiniteLength;
-    }
+	/**
+	 * Whether element has indefinite length.
+	 *
+	 * @return bool
+	 */
+	public function hasIndefiniteLength(): bool
+	{
+		return $this->_indefiniteLength;
+	}
     
-    /**
-     * Get self with indefinite length encoding set.
-     *
-     * @param bool $indefinite True for indefinite length, false for definite
-     *        length
-     * @return self
-     */
-    public function withIndefiniteLength(bool $indefinite = true): self
-    {
-        $obj = clone $this;
-        $obj->_indefiniteLength = $indefinite;
-        return $obj;
-    }
+	/**
+	 * Get self with indefinite length encoding set.
+	 *
+	 * @param bool $indefinite True for indefinite length, false for definite
+	 *        length
+	 * @return self
+	 */
+	public function withIndefiniteLength(bool $indefinite = true): self
+	{
+		$obj = clone $this;
+		$obj->_indefiniteLength = $indefinite;
+		return $obj;
+	}
     
-    /**
-     *
-     * @see \ASN1\Feature\ElementBase::asElement()
-     * @return Element
-     */
-    final public function asElement(): Element
-    {
-        return $this;
-    }
+	/**
+	 *
+	 * @see \ASN1\Feature\ElementBase::asElement()
+	 * @return Element
+	 */
+	final public function asElement(): Element
+	{
+		return $this;
+	}
     
-    /**
-     * Get element decorated with UnspecifiedType object.
-     *
-     * @return UnspecifiedType
-     */
-    public function asUnspecified(): UnspecifiedType
-    {
-        return new UnspecifiedType($this);
-    }
+	/**
+	 * Get element decorated with UnspecifiedType object.
+	 *
+	 * @return UnspecifiedType
+	 */
+	public function asUnspecified(): UnspecifiedType
+	{
+		return new UnspecifiedType($this);
+	}
     
-    /**
-     * Determine the class that implements the type.
-     *
-     * @param Identifier $identifier
-     * @return string Class name
-     */
-    protected static function _determineImplClass(Identifier $identifier): string
-    {
-        switch ($identifier->typeClass()) {
-            case Identifier::CLASS_UNIVERSAL:
-                return self::_determineUniversalImplClass($identifier->intTag());
-            case Identifier::CLASS_CONTEXT_SPECIFIC:
-                return TaggedType::class;
-            case Identifier::CLASS_APPLICATION:
-                return ApplicationType::class;
-            case Identifier::CLASS_PRIVATE:
-                return PrivateType::class;
-        }
-        throw new \UnexpectedValueException(
-            sprintf("%s %d not implemented.",
-                Identifier::classToName($identifier->typeClass()),
-                $identifier->tag()));
-    }
+	/**
+	 * Determine the class that implements the type.
+	 *
+	 * @param Identifier $identifier
+	 * @return string Class name
+	 */
+	protected static function _determineImplClass(Identifier $identifier): string
+	{
+		switch ($identifier->typeClass()) {
+			case Identifier::CLASS_UNIVERSAL:
+				return self::_determineUniversalImplClass($identifier->intTag());
+			case Identifier::CLASS_CONTEXT_SPECIFIC:
+				return TaggedType::class;
+			case Identifier::CLASS_APPLICATION:
+				return ApplicationType::class;
+			case Identifier::CLASS_PRIVATE:
+				return PrivateType::class;
+		}
+		throw new \UnexpectedValueException(
+			sprintf("%s %d not implemented.",
+				Identifier::classToName($identifier->typeClass()),
+				$identifier->tag()));
+	}
     
-    /**
-     * Determine the class that implements an universal type of the given tag.
-     *
-     * @param int $tag
-     * @throws \UnexpectedValueException
-     * @return string Class name
-     */
-    protected static function _determineUniversalImplClass(int $tag): string
-    {
-        if (!array_key_exists($tag, self::MAP_TAG_TO_CLASS)) {
-            throw new \UnexpectedValueException(
-                "Universal tag $tag not implemented.");
-        }
-        return self::MAP_TAG_TO_CLASS[$tag];
-    }
+	/**
+	 * Determine the class that implements an universal type of the given tag.
+	 *
+	 * @param int $tag
+	 * @throws \UnexpectedValueException
+	 * @return string Class name
+	 */
+	protected static function _determineUniversalImplClass(int $tag): string
+	{
+		if (!array_key_exists($tag, self::MAP_TAG_TO_CLASS)) {
+			throw new \UnexpectedValueException(
+				"Universal tag $tag not implemented.");
+		}
+		return self::MAP_TAG_TO_CLASS[$tag];
+	}
     
-    /**
-     * Get textual description of the type for debugging purposes.
-     *
-     * @return string
-     */
-    protected function _typeDescriptorString(): string
-    {
-        if ($this->typeClass() == Identifier::CLASS_UNIVERSAL) {
-            return self::tagToName($this->_typeTag);
-        }
-        return sprintf("%s TAG %d", Identifier::classToName($this->typeClass()),
-            $this->_typeTag);
-    }
+	/**
+	 * Get textual description of the type for debugging purposes.
+	 *
+	 * @return string
+	 */
+	protected function _typeDescriptorString(): string
+	{
+		if ($this->typeClass() == Identifier::CLASS_UNIVERSAL) {
+			return self::tagToName($this->_typeTag);
+		}
+		return sprintf("%s TAG %d", Identifier::classToName($this->typeClass()),
+			$this->_typeTag);
+	}
     
-    /**
-     * Get human readable name for an universal tag.
-     *
-     * @param int $tag
-     * @return string
-     */
-    public static function tagToName(int $tag): string
-    {
-        if (!array_key_exists($tag, self::MAP_TYPE_TO_NAME)) {
-            return "TAG $tag";
-        }
-        return self::MAP_TYPE_TO_NAME[$tag];
-    }
+	/**
+	 * Get human readable name for an universal tag.
+	 *
+	 * @param int $tag
+	 * @return string
+	 */
+	public static function tagToName(int $tag): string
+	{
+		if (!array_key_exists($tag, self::MAP_TYPE_TO_NAME)) {
+			return "TAG $tag";
+		}
+		return self::MAP_TYPE_TO_NAME[$tag];
+	}
 }

Spacing +3 added lines, -3 removed lines

@@ -1,5 +1,5 @@ 
 <?php
-declare(strict_types = 1);
+declare(strict_types=1);
 
 namespace ASN1;
 
@@ -59,7 +59,7 @@ 
      *
      * @var array
      */
-    const MAP_TAG_TO_CLASS = [ /* @formatter:off */
+    const MAP_TAG_TO_CLASS = [/* @formatter:off */
         self::TYPE_EOC => Primitive\EOC::class,
         self::TYPE_BOOLEAN => Primitive\Boolean::class,
         self::TYPE_INTEGER => Primitive\Integer::class,
@@ -115,7 +115,7 @@ 
      *
      * @var array
      */
-    const MAP_TYPE_TO_NAME = [ /* @formatter:off */
+    const MAP_TYPE_TO_NAME = [/* @formatter:off */
         self::TYPE_EOC => "EOC",
         self::TYPE_BOOLEAN => "BOOLEAN",
         self::TYPE_INTEGER => "INTEGER",