sop / x509

lib/X509/Certificate/Extension/AuthorityKeyIdentifierExtension.php

Indentation +181 added lines, -181 removed lines

@@ -20,185 +20,185 @@
  */
 class AuthorityKeyIdentifierExtension extends Extension
 {
-    /**
-     * Key identifier.
-     *
-     * @var null|string
-     */
-    protected $_keyIdentifier;
-
-    /**
-     * Issuer name.
-     *
-     * @var null|GeneralNames
-     */
-    protected $_authorityCertIssuer;
-
-    /**
-     * Issuer serial number as a base 10 integer.
-     *
-     * @var null|string
-     */
-    protected $_authorityCertSerialNumber;
-
-    /**
-     * Constructor.
-     *
-     * @param bool              $critical      Conforming CA's must mark as non-critical (false)
-     * @param null|string       $keyIdentifier Key identifier
-     * @param null|GeneralNames $issuer        Issuer name
-     * @param null|int|string   $serial        Issuer serial number as a base 10 integer
-     */
-    public function __construct(bool $critical, ?string $keyIdentifier,
-        ?GeneralNames $issuer = null, $serial = null)
-    {
-        parent::__construct(self::OID_AUTHORITY_KEY_IDENTIFIER, $critical);
-        $this->_keyIdentifier = $keyIdentifier;
-        $this->_authorityCertIssuer = $issuer;
-        $this->_authorityCertSerialNumber = isset($serial) ? strval($serial) : null;
-    }
-
-    /**
-     * Create from public key info.
-     *
-     * @param PublicKeyInfo $pki
-     *
-     * @return AuthorityKeyIdentifierExtension
-     */
-    public static function fromPublicKeyInfo(PublicKeyInfo $pki): self
-    {
-        return new self(false, $pki->keyIdentifier());
-    }
-
-    /**
-     * Whether key identifier is present.
-     *
-     * @return bool
-     */
-    public function hasKeyIdentifier(): bool
-    {
-        return isset($this->_keyIdentifier);
-    }
-
-    /**
-     * Get key identifier.
-     *
-     * @throws \LogicException If not set
-     *
-     * @return string
-     */
-    public function keyIdentifier(): string
-    {
-        if (!$this->hasKeyIdentifier()) {
-            throw new \LogicException('keyIdentifier not set.');
-        }
-        return $this->_keyIdentifier;
-    }
-
-    /**
-     * Whether issuer is present.
-     *
-     * @return bool
-     */
-    public function hasIssuer(): bool
-    {
-        return isset($this->_authorityCertIssuer);
-    }
-
-    /**
-     * Get issuer.
-     *
-     * @throws \LogicException If not set
-     *
-     * @return GeneralNames
-     */
-    public function issuer(): GeneralNames
-    {
-        if (!$this->hasIssuer()) {
-            throw new \LogicException('authorityCertIssuer not set.');
-        }
-        return $this->_authorityCertIssuer;
-    }
-
-    /**
-     * Whether serial is present.
-     *
-     * @return bool
-     */
-    public function hasSerial(): bool
-    {
-        return isset($this->_authorityCertSerialNumber);
-    }
-
-    /**
-     * Get serial number.
-     *
-     * @throws \LogicException If not set
-     *
-     * @return string Base 10 integer string
-     */
-    public function serial(): string
-    {
-        if (!$this->hasSerial()) {
-            throw new \LogicException('authorityCertSerialNumber not set.');
-        }
-        return $this->_authorityCertSerialNumber;
-    }
-
-    /**
-     * {@inheritdoc}
-     */
-    protected static function _fromDER(string $data, bool $critical): Extension
-    {
-        $seq = UnspecifiedType::fromDER($data)->asSequence();
-        $keyIdentifier = null;
-        $issuer = null;
-        $serial = null;
-        if ($seq->hasTagged(0)) {
-            $keyIdentifier = $seq->getTagged(0)
-                ->asImplicit(Element::TYPE_OCTET_STRING)
-                ->asOctetString()->string();
-        }
-        if ($seq->hasTagged(1) || $seq->hasTagged(2)) {
-            if (!$seq->hasTagged(1) || !$seq->hasTagged(2)) {
-                throw new \UnexpectedValueException(
-                    'AuthorityKeyIdentifier must have both' .
-                        ' authorityCertIssuer and authorityCertSerialNumber' .
-                        ' present or both absent.');
-            }
-            $issuer = GeneralNames::fromASN1($seq->getTagged(1)
-                ->asImplicit(Element::TYPE_SEQUENCE)->asSequence());
-            $serial = $seq->getTagged(2)->asImplicit(Element::TYPE_INTEGER)
-                ->asInteger()->number();
-        }
-        return new self($critical, $keyIdentifier, $issuer, $serial);
-    }
-
-    /**
-     * {@inheritdoc}
-     */
-    protected function _valueASN1(): Element
-    {
-        $elements = [];
-        if (isset($this->_keyIdentifier)) {
-            $elements[] = new ImplicitlyTaggedType(0,
-                new OctetString($this->_keyIdentifier));
-        }
-        // if either issuer or serial is set, both must be set
-        if (isset($this->_authorityCertIssuer) ||
-             isset($this->_authorityCertSerialNumber)) {
-            if (!isset($this->_authorityCertIssuer,
-                $this->_authorityCertSerialNumber)) {
-                throw new \LogicException(
-                    'AuthorityKeyIdentifier must have both' .
-                        ' authorityCertIssuer and authorityCertSerialNumber' .
-                        ' present or both absent.');
-            }
-            $elements[] = new ImplicitlyTaggedType(1,
-                $this->_authorityCertIssuer->toASN1());
-            $elements[] = new ImplicitlyTaggedType(2,
-                new Integer($this->_authorityCertSerialNumber));
-        }
-        return new Sequence(...$elements);
-    }
+	/**
+	 * Key identifier.
+	 *
+	 * @var null|string
+	 */
+	protected $_keyIdentifier;
+
+	/**
+	 * Issuer name.
+	 *
+	 * @var null|GeneralNames
+	 */
+	protected $_authorityCertIssuer;
+
+	/**
+	 * Issuer serial number as a base 10 integer.
+	 *
+	 * @var null|string
+	 */
+	protected $_authorityCertSerialNumber;
+
+	/**
+	 * Constructor.
+	 *
+	 * @param bool              $critical      Conforming CA's must mark as non-critical (false)
+	 * @param null|string       $keyIdentifier Key identifier
+	 * @param null|GeneralNames $issuer        Issuer name
+	 * @param null|int|string   $serial        Issuer serial number as a base 10 integer
+	 */
+	public function __construct(bool $critical, ?string $keyIdentifier,
+		?GeneralNames $issuer = null, $serial = null)
+	{
+		parent::__construct(self::OID_AUTHORITY_KEY_IDENTIFIER, $critical);
+		$this->_keyIdentifier = $keyIdentifier;
+		$this->_authorityCertIssuer = $issuer;
+		$this->_authorityCertSerialNumber = isset($serial) ? strval($serial) : null;
+	}
+
+	/**
+	 * Create from public key info.
+	 *
+	 * @param PublicKeyInfo $pki
+	 *
+	 * @return AuthorityKeyIdentifierExtension
+	 */
+	public static function fromPublicKeyInfo(PublicKeyInfo $pki): self
+	{
+		return new self(false, $pki->keyIdentifier());
+	}
+
+	/**
+	 * Whether key identifier is present.
+	 *
+	 * @return bool
+	 */
+	public function hasKeyIdentifier(): bool
+	{
+		return isset($this->_keyIdentifier);
+	}
+
+	/**
+	 * Get key identifier.
+	 *
+	 * @throws \LogicException If not set
+	 *
+	 * @return string
+	 */
+	public function keyIdentifier(): string
+	{
+		if (!$this->hasKeyIdentifier()) {
+			throw new \LogicException('keyIdentifier not set.');
+		}
+		return $this->_keyIdentifier;
+	}
+
+	/**
+	 * Whether issuer is present.
+	 *
+	 * @return bool
+	 */
+	public function hasIssuer(): bool
+	{
+		return isset($this->_authorityCertIssuer);
+	}
+
+	/**
+	 * Get issuer.
+	 *
+	 * @throws \LogicException If not set
+	 *
+	 * @return GeneralNames
+	 */
+	public function issuer(): GeneralNames
+	{
+		if (!$this->hasIssuer()) {
+			throw new \LogicException('authorityCertIssuer not set.');
+		}
+		return $this->_authorityCertIssuer;
+	}
+
+	/**
+	 * Whether serial is present.
+	 *
+	 * @return bool
+	 */
+	public function hasSerial(): bool
+	{
+		return isset($this->_authorityCertSerialNumber);
+	}
+
+	/**
+	 * Get serial number.
+	 *
+	 * @throws \LogicException If not set
+	 *
+	 * @return string Base 10 integer string
+	 */
+	public function serial(): string
+	{
+		if (!$this->hasSerial()) {
+			throw new \LogicException('authorityCertSerialNumber not set.');
+		}
+		return $this->_authorityCertSerialNumber;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	protected static function _fromDER(string $data, bool $critical): Extension
+	{
+		$seq = UnspecifiedType::fromDER($data)->asSequence();
+		$keyIdentifier = null;
+		$issuer = null;
+		$serial = null;
+		if ($seq->hasTagged(0)) {
+			$keyIdentifier = $seq->getTagged(0)
+				->asImplicit(Element::TYPE_OCTET_STRING)
+				->asOctetString()->string();
+		}
+		if ($seq->hasTagged(1) || $seq->hasTagged(2)) {
+			if (!$seq->hasTagged(1) || !$seq->hasTagged(2)) {
+				throw new \UnexpectedValueException(
+					'AuthorityKeyIdentifier must have both' .
+						' authorityCertIssuer and authorityCertSerialNumber' .
+						' present or both absent.');
+			}
+			$issuer = GeneralNames::fromASN1($seq->getTagged(1)
+				->asImplicit(Element::TYPE_SEQUENCE)->asSequence());
+			$serial = $seq->getTagged(2)->asImplicit(Element::TYPE_INTEGER)
+				->asInteger()->number();
+		}
+		return new self($critical, $keyIdentifier, $issuer, $serial);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	protected function _valueASN1(): Element
+	{
+		$elements = [];
+		if (isset($this->_keyIdentifier)) {
+			$elements[] = new ImplicitlyTaggedType(0,
+				new OctetString($this->_keyIdentifier));
+		}
+		// if either issuer or serial is set, both must be set
+		if (isset($this->_authorityCertIssuer) ||
+			 isset($this->_authorityCertSerialNumber)) {
+			if (!isset($this->_authorityCertIssuer,
+				$this->_authorityCertSerialNumber)) {
+				throw new \LogicException(
+					'AuthorityKeyIdentifier must have both' .
+						' authorityCertIssuer and authorityCertSerialNumber' .
+						' present or both absent.');
+			}
+			$elements[] = new ImplicitlyTaggedType(1,
+				$this->_authorityCertIssuer->toASN1());
+			$elements[] = new ImplicitlyTaggedType(2,
+				new Integer($this->_authorityCertSerialNumber));
+		}
+		return new Sequence(...$elements);
+	}
 }

Spacing +1 added lines, -1 removed lines

@@ -1,6 +1,6 @@
 <?php
 
-declare(strict_types = 1);
+declare(strict_types=1);
 
 namespace Sop\X509\Certificate\Extension;
 

lib/X509/Certificate/Time.php

Spacing +1 added lines, -1 removed lines

@@ -1,6 +1,6 @@
 <?php
 
-declare(strict_types = 1);
+declare(strict_types=1);
 
 namespace Sop\X509\Certificate;
 

Indentation +96 added lines, -96 removed lines

@@ -17,108 +17,108 @@
  */
 class Time
 {
-    use DateTimeHelper;
+	use DateTimeHelper;
 
-    /**
-     * Datetime.
-     *
-     * @var \DateTimeImmutable
-     */
-    protected $_dt;
+	/**
+	 * Datetime.
+	 *
+	 * @var \DateTimeImmutable
+	 */
+	protected $_dt;
 
-    /**
-     * Time ASN.1 type tag.
-     *
-     * @var int
-     */
-    protected $_type;
+	/**
+	 * Time ASN.1 type tag.
+	 *
+	 * @var int
+	 */
+	protected $_type;
 
-    /**
-     * Constructor.
-     *
-     * @param \DateTimeImmutable $dt
-     */
-    public function __construct(\DateTimeImmutable $dt)
-    {
-        $this->_dt = $dt;
-        $this->_type = self::_determineType($dt);
-    }
+	/**
+	 * Constructor.
+	 *
+	 * @param \DateTimeImmutable $dt
+	 */
+	public function __construct(\DateTimeImmutable $dt)
+	{
+		$this->_dt = $dt;
+		$this->_type = self::_determineType($dt);
+	}
 
-    /**
-     * Initialize from ASN.1.
-     *
-     * @param TimeType $el
-     *
-     * @return self
-     */
-    public static function fromASN1(TimeType $el): self
-    {
-        $obj = new self($el->dateTime());
-        $obj->_type = $el->tag();
-        return $obj;
-    }
+	/**
+	 * Initialize from ASN.1.
+	 *
+	 * @param TimeType $el
+	 *
+	 * @return self
+	 */
+	public static function fromASN1(TimeType $el): self
+	{
+		$obj = new self($el->dateTime());
+		$obj->_type = $el->tag();
+		return $obj;
+	}
 
-    /**
-     * Initialize from date string.
-     *
-     * @param null|string $time
-     * @param null|string $tz
-     *
-     * @return self
-     */
-    public static function fromString(?string $time, ?string $tz = null): self
-    {
-        return new self(self::_createDateTime($time, $tz));
-    }
+	/**
+	 * Initialize from date string.
+	 *
+	 * @param null|string $time
+	 * @param null|string $tz
+	 *
+	 * @return self
+	 */
+	public static function fromString(?string $time, ?string $tz = null): self
+	{
+		return new self(self::_createDateTime($time, $tz));
+	}
 
-    /**
-     * Get datetime.
-     *
-     * @return \DateTimeImmutable
-     */
-    public function dateTime(): \DateTimeImmutable
-    {
-        return $this->_dt;
-    }
+	/**
+	 * Get datetime.
+	 *
+	 * @return \DateTimeImmutable
+	 */
+	public function dateTime(): \DateTimeImmutable
+	{
+		return $this->_dt;
+	}
 
-    /**
-     * Generate ASN.1.
-     *
-     * @throws \UnexpectedValueException
-     *
-     * @return TimeType
-     */
-    public function toASN1(): TimeType
-    {
-        $dt = $this->_dt;
-        switch ($this->_type) {
-            case Element::TYPE_UTC_TIME:
-                return new UTCTime($dt);
-            case Element::TYPE_GENERALIZED_TIME:
-                // GeneralizedTime must not contain fractional seconds
-                // (rfc5280 4.1.2.5.2)
-                if (0 !== intval($dt->format('u'))) {
-                    // remove fractional seconds (round down)
-                    $dt = self::_roundDownFractionalSeconds($dt);
-                }
-                return new GeneralizedTime($dt);
-        }
-        throw new \UnexpectedValueException(
-            'Time type ' . Element::tagToName($this->_type) . ' not supported.');
-    }
+	/**
+	 * Generate ASN.1.
+	 *
+	 * @throws \UnexpectedValueException
+	 *
+	 * @return TimeType
+	 */
+	public function toASN1(): TimeType
+	{
+		$dt = $this->_dt;
+		switch ($this->_type) {
+			case Element::TYPE_UTC_TIME:
+				return new UTCTime($dt);
+			case Element::TYPE_GENERALIZED_TIME:
+				// GeneralizedTime must not contain fractional seconds
+				// (rfc5280 4.1.2.5.2)
+				if (0 !== intval($dt->format('u'))) {
+					// remove fractional seconds (round down)
+					$dt = self::_roundDownFractionalSeconds($dt);
+				}
+				return new GeneralizedTime($dt);
+		}
+		throw new \UnexpectedValueException(
+			'Time type ' . Element::tagToName($this->_type) . ' not supported.');
+	}
 
-    /**
-     * Determine whether to use UTCTime or GeneralizedTime ASN.1 type.
-     *
-     * @param \DateTimeImmutable $dt
-     *
-     * @return int Type tag
-     */
-    protected static function _determineType(\DateTimeImmutable $dt): int
-    {
-        if ($dt->format('Y') >= 2050) {
-            return Element::TYPE_GENERALIZED_TIME;
-        }
-        return Element::TYPE_UTC_TIME;
-    }
+	/**
+	 * Determine whether to use UTCTime or GeneralizedTime ASN.1 type.
+	 *
+	 * @param \DateTimeImmutable $dt
+	 *
+	 * @return int Type tag
+	 */
+	protected static function _determineType(\DateTimeImmutable $dt): int
+	{
+		if ($dt->format('Y') >= 2050) {
+			return Element::TYPE_GENERALIZED_TIME;
+		}
+		return Element::TYPE_UTC_TIME;
+	}
 }

Switch Indentation +10 added lines, -10 removed lines

@@ -92,16 +92,16 @@
     {
         $dt = $this->_dt;
         switch ($this->_type) {
-            case Element::TYPE_UTC_TIME:
-                return new UTCTime($dt);
-            case Element::TYPE_GENERALIZED_TIME:
-                // GeneralizedTime must not contain fractional seconds
-                // (rfc5280 4.1.2.5.2)
-                if (0 !== intval($dt->format('u'))) {
-                    // remove fractional seconds (round down)
-                    $dt = self::_roundDownFractionalSeconds($dt);
-                }
-                return new GeneralizedTime($dt);
+        case Element::TYPE_UTC_TIME:
+            return new UTCTime($dt);
+        case Element::TYPE_GENERALIZED_TIME:
+            // GeneralizedTime must not contain fractional seconds
+            // (rfc5280 4.1.2.5.2)
+            if (0 !== intval($dt->format('u'))) {
+                // remove fractional seconds (round down)
+                $dt = self::_roundDownFractionalSeconds($dt);
+            }
+            return new GeneralizedTime($dt);
         }
         throw new \UnexpectedValueException(
             'Time type ' . Element::tagToName($this->_type) . ' not supported.');

lib/X509/Certificate/TBSCertificate.php

Spacing +1 added lines, -1 removed lines

@@ -1,6 +1,6 @@
 <?php
 
-declare(strict_types = 1);
+declare(strict_types=1);
 
 namespace Sop\X509\Certificate;
 

Indentation +618 added lines, -618 removed lines

@@ -27,622 +27,622 @@
  */
 class TBSCertificate
 {
-    // Certificate version enumerations
-    const VERSION_1 = 0;
-    const VERSION_2 = 1;
-    const VERSION_3 = 2;
-
-    /**
-     * Certificate version.
-     *
-     * @var null|int
-     */
-    protected $_version;
-
-    /**
-     * Serial number.
-     *
-     * @var null|string
-     */
-    protected $_serialNumber;
-
-    /**
-     * Signature algorithm.
-     *
-     * @var null|SignatureAlgorithmIdentifier
-     */
-    protected $_signature;
-
-    /**
-     * Certificate issuer.
-     *
-     * @var Name
-     */
-    protected $_issuer;
-
-    /**
-     * Certificate validity period.
-     *
-     * @var Validity
-     */
-    protected $_validity;
-
-    /**
-     * Certificate subject.
-     *
-     * @var Name
-     */
-    protected $_subject;
-
-    /**
-     * Subject public key.
-     *
-     * @var PublicKeyInfo
-     */
-    protected $_subjectPublicKeyInfo;
-
-    /**
-     * Issuer unique identifier.
-     *
-     * @var null|UniqueIdentifier
-     */
-    protected $_issuerUniqueID;
-
-    /**
-     * Subject unique identifier.
-     *
-     * @var null|UniqueIdentifier
-     */
-    protected $_subjectUniqueID;
-
-    /**
-     * Extensions.
-     *
-     * @var Extensions
-     */
-    protected $_extensions;
-
-    /**
-     * Constructor.
-     *
-     * @param Name          $subject  Certificate subject
-     * @param PublicKeyInfo $pki      Subject public key
-     * @param Name          $issuer   Certificate issuer
-     * @param Validity      $validity Validity period
-     */
-    public function __construct(Name $subject, PublicKeyInfo $pki, Name $issuer,
-        Validity $validity)
-    {
-        $this->_subject = $subject;
-        $this->_subjectPublicKeyInfo = $pki;
-        $this->_issuer = $issuer;
-        $this->_validity = $validity;
-        $this->_extensions = new Extensions();
-    }
-
-    /**
-     * Initialize from ASN.1.
-     *
-     * @param Sequence $seq
-     *
-     * @return self
-     */
-    public static function fromASN1(Sequence $seq): self
-    {
-        $idx = 0;
-        if ($seq->hasTagged(0)) {
-            ++$idx;
-            $version = $seq->getTagged(0)->asExplicit()->asInteger()->intNumber();
-        } else {
-            $version = self::VERSION_1;
-        }
-        $serial = $seq->at($idx++)->asInteger()->number();
-        $algo = AlgorithmIdentifier::fromASN1($seq->at($idx++)->asSequence());
-        if (!$algo instanceof SignatureAlgorithmIdentifier) {
-            throw new \UnexpectedValueException(
-                'Unsupported signature algorithm ' . $algo->name() . '.');
-        }
-        $issuer = Name::fromASN1($seq->at($idx++)->asSequence());
-        $validity = Validity::fromASN1($seq->at($idx++)->asSequence());
-        $subject = Name::fromASN1($seq->at($idx++)->asSequence());
-        $pki = PublicKeyInfo::fromASN1($seq->at($idx++)->asSequence());
-        $tbs_cert = new self($subject, $pki, $issuer, $validity);
-        $tbs_cert->_version = $version;
-        $tbs_cert->_serialNumber = $serial;
-        $tbs_cert->_signature = $algo;
-        if ($seq->hasTagged(1)) {
-            $tbs_cert->_issuerUniqueID = UniqueIdentifier::fromASN1(
-                $seq->getTagged(1)->asImplicit(Element::TYPE_BIT_STRING)
-                    ->asBitString());
-        }
-        if ($seq->hasTagged(2)) {
-            $tbs_cert->_subjectUniqueID = UniqueIdentifier::fromASN1(
-                $seq->getTagged(2)->asImplicit(Element::TYPE_BIT_STRING)
-                    ->asBitString());
-        }
-        if ($seq->hasTagged(3)) {
-            $tbs_cert->_extensions = Extensions::fromASN1(
-                $seq->getTagged(3)->asExplicit()->asSequence());
-        }
-        return $tbs_cert;
-    }
-
-    /**
-     * Initialize from certification request.
-     *
-     * Note that signature is not verified and must be done by the caller.
-     *
-     * @param CertificationRequest $cr
-     *
-     * @return self
-     */
-    public static function fromCSR(CertificationRequest $cr): self
-    {
-        $cri = $cr->certificationRequestInfo();
-        $tbs_cert = new self($cri->subject(), $cri->subjectPKInfo(), new Name(),
-            Validity::fromStrings(null, null));
-        // if CSR has Extension Request attribute
-        if ($cri->hasAttributes()) {
-            $attribs = $cri->attributes();
-            if ($attribs->hasExtensionRequest()) {
-                $tbs_cert = $tbs_cert->withExtensions(
-                    $attribs->extensionRequest()->extensions());
-            }
-        }
-        // add Subject Key Identifier extension
-        return $tbs_cert->withAdditionalExtensions(
-            new SubjectKeyIdentifierExtension(false,
-                $cri->subjectPKInfo()->keyIdentifier()));
-    }
-
-    /**
-     * Get self with fields set from the issuer's certificate.
-     *
-     * Issuer shall be set to issuing certificate's subject.
-     * Authority key identifier extensions shall be added with a key identifier
-     * set to issuing certificate's public key identifier.
-     *
-     * @param Certificate $cert Issuing party's certificate
-     *
-     * @return self
-     */
-    public function withIssuerCertificate(Certificate $cert): self
-    {
-        $obj = clone $this;
-        // set issuer DN from cert's subject
-        $obj->_issuer = $cert->tbsCertificate()->subject();
-        // add authority key identifier extension
-        $key_id = $cert->tbsCertificate()->subjectPublicKeyInfo()->keyIdentifier();
-        $obj->_extensions = $obj->_extensions->withExtensions(
-            new AuthorityKeyIdentifierExtension(false, $key_id));
-        return $obj;
-    }
-
-    /**
-     * Get self with given version.
-     *
-     * If version is not set, appropriate version is automatically
-     * determined during signing.
-     *
-     * @param int $version
-     *
-     * @return self
-     */
-    public function withVersion(int $version): self
-    {
-        $obj = clone $this;
-        $obj->_version = $version;
-        return $obj;
-    }
-
-    /**
-     * Get self with given serial number.
-     *
-     * @param int|string $serial Base 10 number
-     *
-     * @return self
-     */
-    public function withSerialNumber($serial): self
-    {
-        $obj = clone $this;
-        $obj->_serialNumber = strval($serial);
-        return $obj;
-    }
-
-    /**
-     * Get self with random positive serial number.
-     *
-     * @param int $size Number of random bytes
-     *
-     * @return self
-     */
-    public function withRandomSerialNumber(int $size = 16): self
-    {
-        // ensure that first byte is always non-zero and having first bit unset
-        $num = gmp_init(mt_rand(1, 0x7f), 10);
-        for ($i = 1; $i < $size; ++$i) {
-            $num <<= 8;
-            $num += mt_rand(0, 0xff);
-        }
-        return $this->withSerialNumber(gmp_strval($num, 10));
-    }
-
-    /**
-     * Get self with given signature algorithm.
-     *
-     * @param SignatureAlgorithmIdentifier $algo
-     *
-     * @return self
-     */
-    public function withSignature(SignatureAlgorithmIdentifier $algo): self
-    {
-        $obj = clone $this;
-        $obj->_signature = $algo;
-        return $obj;
-    }
-
-    /**
-     * Get self with given issuer.
-     *
-     * @param Name $issuer
-     *
-     * @return self
-     */
-    public function withIssuer(Name $issuer): self
-    {
-        $obj = clone $this;
-        $obj->_issuer = $issuer;
-        return $obj;
-    }
-
-    /**
-     * Get self with given validity.
-     *
-     * @param Validity $validity
-     *
-     * @return self
-     */
-    public function withValidity(Validity $validity): self
-    {
-        $obj = clone $this;
-        $obj->_validity = $validity;
-        return $obj;
-    }
-
-    /**
-     * Get self with given subject.
-     *
-     * @param Name $subject
-     *
-     * @return self
-     */
-    public function withSubject(Name $subject): self
-    {
-        $obj = clone $this;
-        $obj->_subject = $subject;
-        return $obj;
-    }
-
-    /**
-     * Get self with given subject public key info.
-     *
-     * @param PublicKeyInfo $pub_key_info
-     *
-     * @return self
-     */
-    public function withSubjectPublicKeyInfo(PublicKeyInfo $pub_key_info): self
-    {
-        $obj = clone $this;
-        $obj->_subjectPublicKeyInfo = $pub_key_info;
-        return $obj;
-    }
-
-    /**
-     * Get self with issuer unique ID.
-     *
-     * @param UniqueIdentifier $id
-     *
-     * @return self
-     */
-    public function withIssuerUniqueID(UniqueIdentifier $id): self
-    {
-        $obj = clone $this;
-        $obj->_issuerUniqueID = $id;
-        return $obj;
-    }
-
-    /**
-     * Get self with subject unique ID.
-     *
-     * @param UniqueIdentifier $id
-     *
-     * @return self
-     */
-    public function withSubjectUniqueID(UniqueIdentifier $id): self
-    {
-        $obj = clone $this;
-        $obj->_subjectUniqueID = $id;
-        return $obj;
-    }
-
-    /**
-     * Get self with given extensions.
-     *
-     * @param Extensions $extensions
-     *
-     * @return self
-     */
-    public function withExtensions(Extensions $extensions): self
-    {
-        $obj = clone $this;
-        $obj->_extensions = $extensions;
-        return $obj;
-    }
-
-    /**
-     * Get self with extensions added.
-     *
-     * @param Extension ...$exts One or more Extension objects
-     *
-     * @return self
-     */
-    public function withAdditionalExtensions(Extension ...$exts): self
-    {
-        $obj = clone $this;
-        $obj->_extensions = $obj->_extensions->withExtensions(...$exts);
-        return $obj;
-    }
-
-    /**
-     * Check whether version is set.
-     *
-     * @return bool
-     */
-    public function hasVersion(): bool
-    {
-        return isset($this->_version);
-    }
-
-    /**
-     * Get certificate version.
-     *
-     * @throws \LogicException If not set
-     *
-     * @return int
-     */
-    public function version(): int
-    {
-        if (!$this->hasVersion()) {
-            throw new \LogicException('version not set.');
-        }
-        return $this->_version;
-    }
-
-    /**
-     * Check whether serial number is set.
-     *
-     * @return bool
-     */
-    public function hasSerialNumber(): bool
-    {
-        return isset($this->_serialNumber);
-    }
-
-    /**
-     * Get serial number.
-     *
-     * @throws \LogicException If not set
-     *
-     * @return string Base 10 integer
-     */
-    public function serialNumber(): string
-    {
-        if (!$this->hasSerialNumber()) {
-            throw new \LogicException('serialNumber not set.');
-        }
-        return $this->_serialNumber;
-    }
-
-    /**
-     * Check whether signature algorithm is set.
-     *
-     * @return bool
-     */
-    public function hasSignature(): bool
-    {
-        return isset($this->_signature);
-    }
-
-    /**
-     * Get signature algorithm.
-     *
-     * @throws \LogicException If not set
-     *
-     * @return SignatureAlgorithmIdentifier
-     */
-    public function signature(): SignatureAlgorithmIdentifier
-    {
-        if (!$this->hasSignature()) {
-            throw new \LogicException('signature not set.');
-        }
-        return $this->_signature;
-    }
-
-    /**
-     * Get issuer.
-     *
-     * @return Name
-     */
-    public function issuer(): Name
-    {
-        return $this->_issuer;
-    }
-
-    /**
-     * Get validity period.
-     *
-     * @return Validity
-     */
-    public function validity(): Validity
-    {
-        return $this->_validity;
-    }
-
-    /**
-     * Get subject.
-     *
-     * @return Name
-     */
-    public function subject(): Name
-    {
-        return $this->_subject;
-    }
-
-    /**
-     * Get subject public key.
-     *
-     * @return PublicKeyInfo
-     */
-    public function subjectPublicKeyInfo(): PublicKeyInfo
-    {
-        return $this->_subjectPublicKeyInfo;
-    }
-
-    /**
-     * Whether issuer unique identifier is present.
-     *
-     * @return bool
-     */
-    public function hasIssuerUniqueID(): bool
-    {
-        return isset($this->_issuerUniqueID);
-    }
-
-    /**
-     * Get issuerUniqueID.
-     *
-     * @throws \LogicException If not set
-     *
-     * @return UniqueIdentifier
-     */
-    public function issuerUniqueID(): UniqueIdentifier
-    {
-        if (!$this->hasIssuerUniqueID()) {
-            throw new \LogicException('issuerUniqueID not set.');
-        }
-        return $this->_issuerUniqueID;
-    }
-
-    /**
-     * Whether subject unique identifier is present.
-     *
-     * @return bool
-     */
-    public function hasSubjectUniqueID(): bool
-    {
-        return isset($this->_subjectUniqueID);
-    }
-
-    /**
-     * Get subjectUniqueID.
-     *
-     * @throws \LogicException If not set
-     *
-     * @return UniqueIdentifier
-     */
-    public function subjectUniqueID(): UniqueIdentifier
-    {
-        if (!$this->hasSubjectUniqueID()) {
-            throw new \LogicException('subjectUniqueID not set.');
-        }
-        return $this->_subjectUniqueID;
-    }
-
-    /**
-     * Get extensions.
-     *
-     * @return Extensions
-     */
-    public function extensions(): Extensions
-    {
-        return $this->_extensions;
-    }
-
-    /**
-     * Generate ASN.1 structure.
-     *
-     * @return Sequence
-     */
-    public function toASN1(): Sequence
-    {
-        $elements = [];
-        $version = $this->version();
-        // if version is not default
-        if (self::VERSION_1 !== $version) {
-            $elements[] = new ExplicitlyTaggedType(0, new Integer($version));
-        }
-        $serial = $this->serialNumber();
-        $signature = $this->signature();
-        // add required elements
-        array_push($elements, new Integer($serial), $signature->toASN1(),
-            $this->_issuer->toASN1(), $this->_validity->toASN1(),
-            $this->_subject->toASN1(), $this->_subjectPublicKeyInfo->toASN1());
-        if (isset($this->_issuerUniqueID)) {
-            $elements[] = new ImplicitlyTaggedType(1,
-                $this->_issuerUniqueID->toASN1());
-        }
-        if (isset($this->_subjectUniqueID)) {
-            $elements[] = new ImplicitlyTaggedType(2,
-                $this->_subjectUniqueID->toASN1());
-        }
-        if (count($this->_extensions)) {
-            $elements[] = new ExplicitlyTaggedType(3,
-                $this->_extensions->toASN1());
-        }
-        return new Sequence(...$elements);
-    }
-
-    /**
-     * Create signed certificate.
-     *
-     * @param SignatureAlgorithmIdentifier $algo         Algorithm used for signing
-     * @param PrivateKeyInfo               $privkey_info Private key used for signing
-     * @param null|Crypto                  $crypto       Crypto engine, use default if not set
-     *
-     * @return Certificate
-     */
-    public function sign(SignatureAlgorithmIdentifier $algo,
-        PrivateKeyInfo $privkey_info, ?Crypto $crypto = null): Certificate
-    {
-        $crypto = $crypto ?? Crypto::getDefault();
-        $tbs_cert = clone $this;
-        if (!isset($tbs_cert->_version)) {
-            $tbs_cert->_version = $tbs_cert->_determineVersion();
-        }
-        if (!isset($tbs_cert->_serialNumber)) {
-            $tbs_cert->_serialNumber = strval(0);
-        }
-        $tbs_cert->_signature = $algo;
-        $data = $tbs_cert->toASN1()->toDER();
-        $signature = $crypto->sign($data, $privkey_info, $algo);
-        return new Certificate($tbs_cert, $algo, $signature);
-    }
-
-    /**
-     * Determine minimum version for the certificate.
-     *
-     * @return int
-     */
-    protected function _determineVersion(): int
-    {
-        // if extensions are present
-        if (count($this->_extensions)) {
-            return self::VERSION_3;
-        }
-        // if UniqueIdentifier is present
-        if (isset($this->_issuerUniqueID) || isset($this->_subjectUniqueID)) {
-            return self::VERSION_2;
-        }
-        return self::VERSION_1;
-    }
+	// Certificate version enumerations
+	const VERSION_1 = 0;
+	const VERSION_2 = 1;
+	const VERSION_3 = 2;
+
+	/**
+	 * Certificate version.
+	 *
+	 * @var null|int
+	 */
+	protected $_version;
+
+	/**
+	 * Serial number.
+	 *
+	 * @var null|string
+	 */
+	protected $_serialNumber;
+
+	/**
+	 * Signature algorithm.
+	 *
+	 * @var null|SignatureAlgorithmIdentifier
+	 */
+	protected $_signature;
+
+	/**
+	 * Certificate issuer.
+	 *
+	 * @var Name
+	 */
+	protected $_issuer;
+
+	/**
+	 * Certificate validity period.
+	 *
+	 * @var Validity
+	 */
+	protected $_validity;
+
+	/**
+	 * Certificate subject.
+	 *
+	 * @var Name
+	 */
+	protected $_subject;
+
+	/**
+	 * Subject public key.
+	 *
+	 * @var PublicKeyInfo
+	 */
+	protected $_subjectPublicKeyInfo;
+
+	/**
+	 * Issuer unique identifier.
+	 *
+	 * @var null|UniqueIdentifier
+	 */
+	protected $_issuerUniqueID;
+
+	/**
+	 * Subject unique identifier.
+	 *
+	 * @var null|UniqueIdentifier
+	 */
+	protected $_subjectUniqueID;
+
+	/**
+	 * Extensions.
+	 *
+	 * @var Extensions
+	 */
+	protected $_extensions;
+
+	/**
+	 * Constructor.
+	 *
+	 * @param Name          $subject  Certificate subject
+	 * @param PublicKeyInfo $pki      Subject public key
+	 * @param Name          $issuer   Certificate issuer
+	 * @param Validity      $validity Validity period
+	 */
+	public function __construct(Name $subject, PublicKeyInfo $pki, Name $issuer,
+		Validity $validity)
+	{
+		$this->_subject = $subject;
+		$this->_subjectPublicKeyInfo = $pki;
+		$this->_issuer = $issuer;
+		$this->_validity = $validity;
+		$this->_extensions = new Extensions();
+	}
+
+	/**
+	 * Initialize from ASN.1.
+	 *
+	 * @param Sequence $seq
+	 *
+	 * @return self
+	 */
+	public static function fromASN1(Sequence $seq): self
+	{
+		$idx = 0;
+		if ($seq->hasTagged(0)) {
+			++$idx;
+			$version = $seq->getTagged(0)->asExplicit()->asInteger()->intNumber();
+		} else {
+			$version = self::VERSION_1;
+		}
+		$serial = $seq->at($idx++)->asInteger()->number();
+		$algo = AlgorithmIdentifier::fromASN1($seq->at($idx++)->asSequence());
+		if (!$algo instanceof SignatureAlgorithmIdentifier) {
+			throw new \UnexpectedValueException(
+				'Unsupported signature algorithm ' . $algo->name() . '.');
+		}
+		$issuer = Name::fromASN1($seq->at($idx++)->asSequence());
+		$validity = Validity::fromASN1($seq->at($idx++)->asSequence());
+		$subject = Name::fromASN1($seq->at($idx++)->asSequence());
+		$pki = PublicKeyInfo::fromASN1($seq->at($idx++)->asSequence());
+		$tbs_cert = new self($subject, $pki, $issuer, $validity);
+		$tbs_cert->_version = $version;
+		$tbs_cert->_serialNumber = $serial;
+		$tbs_cert->_signature = $algo;
+		if ($seq->hasTagged(1)) {
+			$tbs_cert->_issuerUniqueID = UniqueIdentifier::fromASN1(
+				$seq->getTagged(1)->asImplicit(Element::TYPE_BIT_STRING)
+					->asBitString());
+		}
+		if ($seq->hasTagged(2)) {
+			$tbs_cert->_subjectUniqueID = UniqueIdentifier::fromASN1(
+				$seq->getTagged(2)->asImplicit(Element::TYPE_BIT_STRING)
+					->asBitString());
+		}
+		if ($seq->hasTagged(3)) {
+			$tbs_cert->_extensions = Extensions::fromASN1(
+				$seq->getTagged(3)->asExplicit()->asSequence());
+		}
+		return $tbs_cert;
+	}
+
+	/**
+	 * Initialize from certification request.
+	 *
+	 * Note that signature is not verified and must be done by the caller.
+	 *
+	 * @param CertificationRequest $cr
+	 *
+	 * @return self
+	 */
+	public static function fromCSR(CertificationRequest $cr): self
+	{
+		$cri = $cr->certificationRequestInfo();
+		$tbs_cert = new self($cri->subject(), $cri->subjectPKInfo(), new Name(),
+			Validity::fromStrings(null, null));
+		// if CSR has Extension Request attribute
+		if ($cri->hasAttributes()) {
+			$attribs = $cri->attributes();
+			if ($attribs->hasExtensionRequest()) {
+				$tbs_cert = $tbs_cert->withExtensions(
+					$attribs->extensionRequest()->extensions());
+			}
+		}
+		// add Subject Key Identifier extension
+		return $tbs_cert->withAdditionalExtensions(
+			new SubjectKeyIdentifierExtension(false,
+				$cri->subjectPKInfo()->keyIdentifier()));
+	}
+
+	/**
+	 * Get self with fields set from the issuer's certificate.
+	 *
+	 * Issuer shall be set to issuing certificate's subject.
+	 * Authority key identifier extensions shall be added with a key identifier
+	 * set to issuing certificate's public key identifier.
+	 *
+	 * @param Certificate $cert Issuing party's certificate
+	 *
+	 * @return self
+	 */
+	public function withIssuerCertificate(Certificate $cert): self
+	{
+		$obj = clone $this;
+		// set issuer DN from cert's subject
+		$obj->_issuer = $cert->tbsCertificate()->subject();
+		// add authority key identifier extension
+		$key_id = $cert->tbsCertificate()->subjectPublicKeyInfo()->keyIdentifier();
+		$obj->_extensions = $obj->_extensions->withExtensions(
+			new AuthorityKeyIdentifierExtension(false, $key_id));
+		return $obj;
+	}
+
+	/**
+	 * Get self with given version.
+	 *
+	 * If version is not set, appropriate version is automatically
+	 * determined during signing.
+	 *
+	 * @param int $version
+	 *
+	 * @return self
+	 */
+	public function withVersion(int $version): self
+	{
+		$obj = clone $this;
+		$obj->_version = $version;
+		return $obj;
+	}
+
+	/**
+	 * Get self with given serial number.
+	 *
+	 * @param int|string $serial Base 10 number
+	 *
+	 * @return self
+	 */
+	public function withSerialNumber($serial): self
+	{
+		$obj = clone $this;
+		$obj->_serialNumber = strval($serial);
+		return $obj;
+	}
+
+	/**
+	 * Get self with random positive serial number.
+	 *
+	 * @param int $size Number of random bytes
+	 *
+	 * @return self
+	 */
+	public function withRandomSerialNumber(int $size = 16): self
+	{
+		// ensure that first byte is always non-zero and having first bit unset
+		$num = gmp_init(mt_rand(1, 0x7f), 10);
+		for ($i = 1; $i < $size; ++$i) {
+			$num <<= 8;
+			$num += mt_rand(0, 0xff);
+		}
+		return $this->withSerialNumber(gmp_strval($num, 10));
+	}
+
+	/**
+	 * Get self with given signature algorithm.
+	 *
+	 * @param SignatureAlgorithmIdentifier $algo
+	 *
+	 * @return self
+	 */
+	public function withSignature(SignatureAlgorithmIdentifier $algo): self
+	{
+		$obj = clone $this;
+		$obj->_signature = $algo;
+		return $obj;
+	}
+
+	/**
+	 * Get self with given issuer.
+	 *
+	 * @param Name $issuer
+	 *
+	 * @return self
+	 */
+	public function withIssuer(Name $issuer): self
+	{
+		$obj = clone $this;
+		$obj->_issuer = $issuer;
+		return $obj;
+	}
+
+	/**
+	 * Get self with given validity.
+	 *
+	 * @param Validity $validity
+	 *
+	 * @return self
+	 */
+	public function withValidity(Validity $validity): self
+	{
+		$obj = clone $this;
+		$obj->_validity = $validity;
+		return $obj;
+	}
+
+	/**
+	 * Get self with given subject.
+	 *
+	 * @param Name $subject
+	 *
+	 * @return self
+	 */
+	public function withSubject(Name $subject): self
+	{
+		$obj = clone $this;
+		$obj->_subject = $subject;
+		return $obj;
+	}
+
+	/**
+	 * Get self with given subject public key info.
+	 *
+	 * @param PublicKeyInfo $pub_key_info
+	 *
+	 * @return self
+	 */
+	public function withSubjectPublicKeyInfo(PublicKeyInfo $pub_key_info): self
+	{
+		$obj = clone $this;
+		$obj->_subjectPublicKeyInfo = $pub_key_info;
+		return $obj;
+	}
+
+	/**
+	 * Get self with issuer unique ID.
+	 *
+	 * @param UniqueIdentifier $id
+	 *
+	 * @return self
+	 */
+	public function withIssuerUniqueID(UniqueIdentifier $id): self
+	{
+		$obj = clone $this;
+		$obj->_issuerUniqueID = $id;
+		return $obj;
+	}
+
+	/**
+	 * Get self with subject unique ID.
+	 *
+	 * @param UniqueIdentifier $id
+	 *
+	 * @return self
+	 */
+	public function withSubjectUniqueID(UniqueIdentifier $id): self
+	{
+		$obj = clone $this;
+		$obj->_subjectUniqueID = $id;
+		return $obj;
+	}
+
+	/**
+	 * Get self with given extensions.
+	 *
+	 * @param Extensions $extensions
+	 *
+	 * @return self
+	 */
+	public function withExtensions(Extensions $extensions): self
+	{
+		$obj = clone $this;
+		$obj->_extensions = $extensions;
+		return $obj;
+	}
+
+	/**
+	 * Get self with extensions added.
+	 *
+	 * @param Extension ...$exts One or more Extension objects
+	 *
+	 * @return self
+	 */
+	public function withAdditionalExtensions(Extension ...$exts): self
+	{
+		$obj = clone $this;
+		$obj->_extensions = $obj->_extensions->withExtensions(...$exts);
+		return $obj;
+	}
+
+	/**
+	 * Check whether version is set.
+	 *
+	 * @return bool
+	 */
+	public function hasVersion(): bool
+	{
+		return isset($this->_version);
+	}
+
+	/**
+	 * Get certificate version.
+	 *
+	 * @throws \LogicException If not set
+	 *
+	 * @return int
+	 */
+	public function version(): int
+	{
+		if (!$this->hasVersion()) {
+			throw new \LogicException('version not set.');
+		}
+		return $this->_version;
+	}
+
+	/**
+	 * Check whether serial number is set.
+	 *
+	 * @return bool
+	 */
+	public function hasSerialNumber(): bool
+	{
+		return isset($this->_serialNumber);
+	}
+
+	/**
+	 * Get serial number.
+	 *
+	 * @throws \LogicException If not set
+	 *
+	 * @return string Base 10 integer
+	 */
+	public function serialNumber(): string
+	{
+		if (!$this->hasSerialNumber()) {
+			throw new \LogicException('serialNumber not set.');
+		}
+		return $this->_serialNumber;
+	}
+
+	/**
+	 * Check whether signature algorithm is set.
+	 *
+	 * @return bool
+	 */
+	public function hasSignature(): bool
+	{
+		return isset($this->_signature);
+	}
+
+	/**
+	 * Get signature algorithm.
+	 *
+	 * @throws \LogicException If not set
+	 *
+	 * @return SignatureAlgorithmIdentifier
+	 */
+	public function signature(): SignatureAlgorithmIdentifier
+	{
+		if (!$this->hasSignature()) {
+			throw new \LogicException('signature not set.');
+		}
+		return $this->_signature;
+	}
+
+	/**
+	 * Get issuer.
+	 *
+	 * @return Name
+	 */
+	public function issuer(): Name
+	{
+		return $this->_issuer;
+	}
+
+	/**
+	 * Get validity period.
+	 *
+	 * @return Validity
+	 */
+	public function validity(): Validity
+	{
+		return $this->_validity;
+	}
+
+	/**
+	 * Get subject.
+	 *
+	 * @return Name
+	 */
+	public function subject(): Name
+	{
+		return $this->_subject;
+	}
+
+	/**
+	 * Get subject public key.
+	 *
+	 * @return PublicKeyInfo
+	 */
+	public function subjectPublicKeyInfo(): PublicKeyInfo
+	{
+		return $this->_subjectPublicKeyInfo;
+	}
+
+	/**
+	 * Whether issuer unique identifier is present.
+	 *
+	 * @return bool
+	 */
+	public function hasIssuerUniqueID(): bool
+	{
+		return isset($this->_issuerUniqueID);
+	}
+
+	/**
+	 * Get issuerUniqueID.
+	 *
+	 * @throws \LogicException If not set
+	 *
+	 * @return UniqueIdentifier
+	 */
+	public function issuerUniqueID(): UniqueIdentifier
+	{
+		if (!$this->hasIssuerUniqueID()) {
+			throw new \LogicException('issuerUniqueID not set.');
+		}
+		return $this->_issuerUniqueID;
+	}
+
+	/**
+	 * Whether subject unique identifier is present.
+	 *
+	 * @return bool
+	 */
+	public function hasSubjectUniqueID(): bool
+	{
+		return isset($this->_subjectUniqueID);
+	}
+
+	/**
+	 * Get subjectUniqueID.
+	 *
+	 * @throws \LogicException If not set
+	 *
+	 * @return UniqueIdentifier
+	 */
+	public function subjectUniqueID(): UniqueIdentifier
+	{
+		if (!$this->hasSubjectUniqueID()) {
+			throw new \LogicException('subjectUniqueID not set.');
+		}
+		return $this->_subjectUniqueID;
+	}
+
+	/**
+	 * Get extensions.
+	 *
+	 * @return Extensions
+	 */
+	public function extensions(): Extensions
+	{
+		return $this->_extensions;
+	}
+
+	/**
+	 * Generate ASN.1 structure.
+	 *
+	 * @return Sequence
+	 */
+	public function toASN1(): Sequence
+	{
+		$elements = [];
+		$version = $this->version();
+		// if version is not default
+		if (self::VERSION_1 !== $version) {
+			$elements[] = new ExplicitlyTaggedType(0, new Integer($version));
+		}
+		$serial = $this->serialNumber();
+		$signature = $this->signature();
+		// add required elements
+		array_push($elements, new Integer($serial), $signature->toASN1(),
+			$this->_issuer->toASN1(), $this->_validity->toASN1(),
+			$this->_subject->toASN1(), $this->_subjectPublicKeyInfo->toASN1());
+		if (isset($this->_issuerUniqueID)) {
+			$elements[] = new ImplicitlyTaggedType(1,
+				$this->_issuerUniqueID->toASN1());
+		}
+		if (isset($this->_subjectUniqueID)) {
+			$elements[] = new ImplicitlyTaggedType(2,
+				$this->_subjectUniqueID->toASN1());
+		}
+		if (count($this->_extensions)) {
+			$elements[] = new ExplicitlyTaggedType(3,
+				$this->_extensions->toASN1());
+		}
+		return new Sequence(...$elements);
+	}
+
+	/**
+	 * Create signed certificate.
+	 *
+	 * @param SignatureAlgorithmIdentifier $algo         Algorithm used for signing
+	 * @param PrivateKeyInfo               $privkey_info Private key used for signing
+	 * @param null|Crypto                  $crypto       Crypto engine, use default if not set
+	 *
+	 * @return Certificate
+	 */
+	public function sign(SignatureAlgorithmIdentifier $algo,
+		PrivateKeyInfo $privkey_info, ?Crypto $crypto = null): Certificate
+	{
+		$crypto = $crypto ?? Crypto::getDefault();
+		$tbs_cert = clone $this;
+		if (!isset($tbs_cert->_version)) {
+			$tbs_cert->_version = $tbs_cert->_determineVersion();
+		}
+		if (!isset($tbs_cert->_serialNumber)) {
+			$tbs_cert->_serialNumber = strval(0);
+		}
+		$tbs_cert->_signature = $algo;
+		$data = $tbs_cert->toASN1()->toDER();
+		$signature = $crypto->sign($data, $privkey_info, $algo);
+		return new Certificate($tbs_cert, $algo, $signature);
+	}
+
+	/**
+	 * Determine minimum version for the certificate.
+	 *
+	 * @return int
+	 */
+	protected function _determineVersion(): int
+	{
+		// if extensions are present
+		if (count($this->_extensions)) {
+			return self::VERSION_3;
+		}
+		// if UniqueIdentifier is present
+		if (isset($this->_issuerUniqueID) || isset($this->_subjectUniqueID)) {
+			return self::VERSION_2;
+		}
+		return self::VERSION_1;
+	}
 }

lib/X509/Certificate/Certificate.php

Spacing +1 added lines, -1 removed lines

@@ -1,6 +1,6 @@
 <?php
 
-declare(strict_types = 1);
+declare(strict_types=1);
 
 namespace Sop\X509\Certificate;
 

Indentation +219 added lines, -219 removed lines

@@ -20,242 +20,242 @@
  */
 class Certificate
 {
-    /**
-     * "To be signed" certificate information.
-     *
-     * @var TBSCertificate
-     */
-    protected $_tbsCertificate;
+	/**
+	 * "To be signed" certificate information.
+	 *
+	 * @var TBSCertificate
+	 */
+	protected $_tbsCertificate;
 
-    /**
-     * Signature algorithm.
-     *
-     * @var SignatureAlgorithmIdentifier
-     */
-    protected $_signatureAlgorithm;
+	/**
+	 * Signature algorithm.
+	 *
+	 * @var SignatureAlgorithmIdentifier
+	 */
+	protected $_signatureAlgorithm;
 
-    /**
-     * Signature value.
-     *
-     * @var Signature
-     */
-    protected $_signatureValue;
+	/**
+	 * Signature value.
+	 *
+	 * @var Signature
+	 */
+	protected $_signatureValue;
 
-    /**
-     * Constructor.
-     *
-     * @param TBSCertificate               $tbsCert
-     * @param SignatureAlgorithmIdentifier $algo
-     * @param Signature                    $signature
-     */
-    public function __construct(TBSCertificate $tbsCert,
-        SignatureAlgorithmIdentifier $algo, Signature $signature)
-    {
-        $this->_tbsCertificate = $tbsCert;
-        $this->_signatureAlgorithm = $algo;
-        $this->_signatureValue = $signature;
-    }
+	/**
+	 * Constructor.
+	 *
+	 * @param TBSCertificate               $tbsCert
+	 * @param SignatureAlgorithmIdentifier $algo
+	 * @param Signature                    $signature
+	 */
+	public function __construct(TBSCertificate $tbsCert,
+		SignatureAlgorithmIdentifier $algo, Signature $signature)
+	{
+		$this->_tbsCertificate = $tbsCert;
+		$this->_signatureAlgorithm = $algo;
+		$this->_signatureValue = $signature;
+	}
 
-    /**
-     * Get certificate as a PEM formatted string.
-     *
-     * @return string
-     */
-    public function __toString(): string
-    {
-        return $this->toPEM()->string();
-    }
+	/**
+	 * Get certificate as a PEM formatted string.
+	 *
+	 * @return string
+	 */
+	public function __toString(): string
+	{
+		return $this->toPEM()->string();
+	}
 
-    /**
-     * Initialize from ASN.1.
-     *
-     * @param Sequence $seq
-     *
-     * @return self
-     */
-    public static function fromASN1(Sequence $seq): self
-    {
-        $tbsCert = TBSCertificate::fromASN1($seq->at(0)->asSequence());
-        $algo = AlgorithmIdentifier::fromASN1($seq->at(1)->asSequence());
-        if (!$algo instanceof SignatureAlgorithmIdentifier) {
-            throw new \UnexpectedValueException(
-                'Unsupported signature algorithm ' . $algo->oid() . '.');
-        }
-        $signature = Signature::fromSignatureData(
-            $seq->at(2)->asBitString()->string(), $algo);
-        return new self($tbsCert, $algo, $signature);
-    }
+	/**
+	 * Initialize from ASN.1.
+	 *
+	 * @param Sequence $seq
+	 *
+	 * @return self
+	 */
+	public static function fromASN1(Sequence $seq): self
+	{
+		$tbsCert = TBSCertificate::fromASN1($seq->at(0)->asSequence());
+		$algo = AlgorithmIdentifier::fromASN1($seq->at(1)->asSequence());
+		if (!$algo instanceof SignatureAlgorithmIdentifier) {
+			throw new \UnexpectedValueException(
+				'Unsupported signature algorithm ' . $algo->oid() . '.');
+		}
+		$signature = Signature::fromSignatureData(
+			$seq->at(2)->asBitString()->string(), $algo);
+		return new self($tbsCert, $algo, $signature);
+	}
 
-    /**
-     * Initialize from DER.
-     *
-     * @param string $data
-     *
-     * @return self
-     */
-    public static function fromDER(string $data): self
-    {
-        return self::fromASN1(UnspecifiedType::fromDER($data)->asSequence());
-    }
+	/**
+	 * Initialize from DER.
+	 *
+	 * @param string $data
+	 *
+	 * @return self
+	 */
+	public static function fromDER(string $data): self
+	{
+		return self::fromASN1(UnspecifiedType::fromDER($data)->asSequence());
+	}
 
-    /**
-     * Initialize from PEM.
-     *
-     * @param PEM $pem
-     *
-     * @throws \UnexpectedValueException
-     *
-     * @return self
-     */
-    public static function fromPEM(PEM $pem): self
-    {
-        if (PEM::TYPE_CERTIFICATE !== $pem->type()) {
-            throw new \UnexpectedValueException('Invalid PEM type.');
-        }
-        return self::fromDER($pem->data());
-    }
+	/**
+	 * Initialize from PEM.
+	 *
+	 * @param PEM $pem
+	 *
+	 * @throws \UnexpectedValueException
+	 *
+	 * @return self
+	 */
+	public static function fromPEM(PEM $pem): self
+	{
+		if (PEM::TYPE_CERTIFICATE !== $pem->type()) {
+			throw new \UnexpectedValueException('Invalid PEM type.');
+		}
+		return self::fromDER($pem->data());
+	}
 
-    /**
-     * Get certificate information.
-     *
-     * @return TBSCertificate
-     */
-    public function tbsCertificate(): TBSCertificate
-    {
-        return $this->_tbsCertificate;
-    }
+	/**
+	 * Get certificate information.
+	 *
+	 * @return TBSCertificate
+	 */
+	public function tbsCertificate(): TBSCertificate
+	{
+		return $this->_tbsCertificate;
+	}
 
-    /**
-     * Get signature algorithm.
-     *
-     * @return SignatureAlgorithmIdentifier
-     */
-    public function signatureAlgorithm(): SignatureAlgorithmIdentifier
-    {
-        return $this->_signatureAlgorithm;
-    }
+	/**
+	 * Get signature algorithm.
+	 *
+	 * @return SignatureAlgorithmIdentifier
+	 */
+	public function signatureAlgorithm(): SignatureAlgorithmIdentifier
+	{
+		return $this->_signatureAlgorithm;
+	}
 
-    /**
-     * Get signature value.
-     *
-     * @return Signature
-     */
-    public function signatureValue(): Signature
-    {
-        return $this->_signatureValue;
-    }
+	/**
+	 * Get signature value.
+	 *
+	 * @return Signature
+	 */
+	public function signatureValue(): Signature
+	{
+		return $this->_signatureValue;
+	}
 
-    /**
-     * Check whether certificate is self-issued.
-     *
-     * @return bool
-     */
-    public function isSelfIssued(): bool
-    {
-        return $this->_tbsCertificate->subject()->equals(
-            $this->_tbsCertificate->issuer());
-    }
+	/**
+	 * Check whether certificate is self-issued.
+	 *
+	 * @return bool
+	 */
+	public function isSelfIssued(): bool
+	{
+		return $this->_tbsCertificate->subject()->equals(
+			$this->_tbsCertificate->issuer());
+	}
 
-    /**
-     * Check whether certificate is semantically equal to another.
-     *
-     * @param Certificate $cert Certificate to compare to
-     *
-     * @return bool
-     */
-    public function equals(Certificate $cert): bool
-    {
-        return $this->_hasEqualSerialNumber($cert) &&
-             $this->_hasEqualPublicKey($cert) && $this->_hasEqualSubject($cert);
-    }
+	/**
+	 * Check whether certificate is semantically equal to another.
+	 *
+	 * @param Certificate $cert Certificate to compare to
+	 *
+	 * @return bool
+	 */
+	public function equals(Certificate $cert): bool
+	{
+		return $this->_hasEqualSerialNumber($cert) &&
+			 $this->_hasEqualPublicKey($cert) && $this->_hasEqualSubject($cert);
+	}
 
-    /**
-     * Generate ASN.1 structure.
-     *
-     * @return Sequence
-     */
-    public function toASN1(): Sequence
-    {
-        return new Sequence($this->_tbsCertificate->toASN1(),
-            $this->_signatureAlgorithm->toASN1(),
-            $this->_signatureValue->bitString());
-    }
+	/**
+	 * Generate ASN.1 structure.
+	 *
+	 * @return Sequence
+	 */
+	public function toASN1(): Sequence
+	{
+		return new Sequence($this->_tbsCertificate->toASN1(),
+			$this->_signatureAlgorithm->toASN1(),
+			$this->_signatureValue->bitString());
+	}
 
-    /**
-     * Get certificate as a DER.
-     *
-     * @return string
-     */
-    public function toDER(): string
-    {
-        return $this->toASN1()->toDER();
-    }
+	/**
+	 * Get certificate as a DER.
+	 *
+	 * @return string
+	 */
+	public function toDER(): string
+	{
+		return $this->toASN1()->toDER();
+	}
 
-    /**
-     * Get certificate as a PEM.
-     *
-     * @return PEM
-     */
-    public function toPEM(): PEM
-    {
-        return new PEM(PEM::TYPE_CERTIFICATE, $this->toDER());
-    }
+	/**
+	 * Get certificate as a PEM.
+	 *
+	 * @return PEM
+	 */
+	public function toPEM(): PEM
+	{
+		return new PEM(PEM::TYPE_CERTIFICATE, $this->toDER());
+	}
 
-    /**
-     * Verify certificate signature.
-     *
-     * @param PublicKeyInfo $pubkey_info Issuer's public key
-     * @param null|Crypto   $crypto      Crypto engine, use default if not set
-     *
-     * @return bool True if certificate signature is valid
-     */
-    public function verify(PublicKeyInfo $pubkey_info, ?Crypto $crypto = null): bool
-    {
-        $crypto = $crypto ?? Crypto::getDefault();
-        $data = $this->_tbsCertificate->toASN1()->toDER();
-        return $crypto->verify($data, $this->_signatureValue, $pubkey_info,
-            $this->_signatureAlgorithm);
-    }
+	/**
+	 * Verify certificate signature.
+	 *
+	 * @param PublicKeyInfo $pubkey_info Issuer's public key
+	 * @param null|Crypto   $crypto      Crypto engine, use default if not set
+	 *
+	 * @return bool True if certificate signature is valid
+	 */
+	public function verify(PublicKeyInfo $pubkey_info, ?Crypto $crypto = null): bool
+	{
+		$crypto = $crypto ?? Crypto::getDefault();
+		$data = $this->_tbsCertificate->toASN1()->toDER();
+		return $crypto->verify($data, $this->_signatureValue, $pubkey_info,
+			$this->_signatureAlgorithm);
+	}
 
-    /**
-     * Check whether certificate has serial number equal to another.
-     *
-     * @param Certificate $cert
-     *
-     * @return bool
-     */
-    private function _hasEqualSerialNumber(Certificate $cert): bool
-    {
-        $sn1 = $this->_tbsCertificate->serialNumber();
-        $sn2 = $cert->_tbsCertificate->serialNumber();
-        return $sn1 === $sn2;
-    }
+	/**
+	 * Check whether certificate has serial number equal to another.
+	 *
+	 * @param Certificate $cert
+	 *
+	 * @return bool
+	 */
+	private function _hasEqualSerialNumber(Certificate $cert): bool
+	{
+		$sn1 = $this->_tbsCertificate->serialNumber();
+		$sn2 = $cert->_tbsCertificate->serialNumber();
+		return $sn1 === $sn2;
+	}
 
-    /**
-     * Check whether certificate has public key equal to another.
-     *
-     * @param Certificate $cert
-     *
-     * @return bool
-     */
-    private function _hasEqualPublicKey(Certificate $cert): bool
-    {
-        $kid1 = $this->_tbsCertificate->subjectPublicKeyInfo()->keyIdentifier();
-        $kid2 = $cert->_tbsCertificate->subjectPublicKeyInfo()->keyIdentifier();
-        return $kid1 === $kid2;
-    }
+	/**
+	 * Check whether certificate has public key equal to another.
+	 *
+	 * @param Certificate $cert
+	 *
+	 * @return bool
+	 */
+	private function _hasEqualPublicKey(Certificate $cert): bool
+	{
+		$kid1 = $this->_tbsCertificate->subjectPublicKeyInfo()->keyIdentifier();
+		$kid2 = $cert->_tbsCertificate->subjectPublicKeyInfo()->keyIdentifier();
+		return $kid1 === $kid2;
+	}
 
-    /**
-     * Check whether certificate has subject equal to another.
-     *
-     * @param Certificate $cert
-     *
-     * @return bool
-     */
-    private function _hasEqualSubject(Certificate $cert): bool
-    {
-        $dn1 = $this->_tbsCertificate->subject();
-        $dn2 = $cert->_tbsCertificate->subject();
-        return $dn1->equals($dn2);
-    }
+	/**
+	 * Check whether certificate has subject equal to another.
+	 *
+	 * @param Certificate $cert
+	 *
+	 * @return bool
+	 */
+	private function _hasEqualSubject(Certificate $cert): bool
+	{
+		$dn1 = $this->_tbsCertificate->subject();
+		$dn2 = $cert->_tbsCertificate->subject();
+		return $dn1->equals($dn2);
+	}
 }

lib/X509/CertificationPath/Exception/PathValidationException.php

Spacing +1 added lines, -1 removed lines

@@ -1,6 +1,6 @@
 <?php
 
-declare(strict_types = 1);
+declare(strict_types=1);
 
 namespace Sop\X509\CertificationPath\Exception;
 

lib/X509/Certificate/Extension/Target/Targets.php

Indentation +121 added lines, -121 removed lines

@@ -14,135 +14,135 @@
  */
 class Targets implements \Countable, \IteratorAggregate
 {
-    /**
-     * Target elements.
-     *
-     * @var Target[]
-     */
-    protected $_targets;
+	/**
+	 * Target elements.
+	 *
+	 * @var Target[]
+	 */
+	protected $_targets;
 
-    /**
-     * Constructor.
-     *
-     * @param Target ...$targets
-     */
-    public function __construct(Target ...$targets)
-    {
-        $this->_targets = $targets;
-    }
+	/**
+	 * Constructor.
+	 *
+	 * @param Target ...$targets
+	 */
+	public function __construct(Target ...$targets)
+	{
+		$this->_targets = $targets;
+	}
 
-    /**
-     * Initialize from ASN.1.
-     *
-     * @param Sequence $seq
-     *
-     * @return self
-     */
-    public static function fromASN1(Sequence $seq): self
-    {
-        $targets = array_map(
-            function (UnspecifiedType $el) {
-                return Target::fromASN1($el->asTagged());
-            }, $seq->elements());
-        return new self(...$targets);
-    }
+	/**
+	 * Initialize from ASN.1.
+	 *
+	 * @param Sequence $seq
+	 *
+	 * @return self
+	 */
+	public static function fromASN1(Sequence $seq): self
+	{
+		$targets = array_map(
+			function (UnspecifiedType $el) {
+				return Target::fromASN1($el->asTagged());
+			}, $seq->elements());
+		return new self(...$targets);
+	}
 
-    /**
-     * Get all targets.
-     *
-     * @return Target[]
-     */
-    public function all(): array
-    {
-        return $this->_targets;
-    }
+	/**
+	 * Get all targets.
+	 *
+	 * @return Target[]
+	 */
+	public function all(): array
+	{
+		return $this->_targets;
+	}
 
-    /**
-     * Get all name targets.
-     *
-     * @return Target[]
-     */
-    public function nameTargets(): array
-    {
-        return $this->_allOfType(Target::TYPE_NAME);
-    }
+	/**
+	 * Get all name targets.
+	 *
+	 * @return Target[]
+	 */
+	public function nameTargets(): array
+	{
+		return $this->_allOfType(Target::TYPE_NAME);
+	}
 
-    /**
-     * Get all group targets.
-     *
-     * @return Target[]
-     */
-    public function groupTargets(): array
-    {
-        return $this->_allOfType(Target::TYPE_GROUP);
-    }
+	/**
+	 * Get all group targets.
+	 *
+	 * @return Target[]
+	 */
+	public function groupTargets(): array
+	{
+		return $this->_allOfType(Target::TYPE_GROUP);
+	}
 
-    /**
-     * Check whether given target is present.
-     *
-     * @param Target $target
-     *
-     * @return bool
-     */
-    public function hasTarget(Target $target): bool
-    {
-        foreach ($this->_allOfType($target->type()) as $t) {
-            if ($target->equals($t)) {
-                return true;
-            }
-        }
-        return false;
-    }
+	/**
+	 * Check whether given target is present.
+	 *
+	 * @param Target $target
+	 *
+	 * @return bool
+	 */
+	public function hasTarget(Target $target): bool
+	{
+		foreach ($this->_allOfType($target->type()) as $t) {
+			if ($target->equals($t)) {
+				return true;
+			}
+		}
+		return false;
+	}
 
-    /**
-     * Generate ASN.1 structure.
-     *
-     * @return Sequence
-     */
-    public function toASN1(): Sequence
-    {
-        $elements = array_map(
-            function (Target $target) {
-                return $target->toASN1();
-            }, $this->_targets);
-        return new Sequence(...$elements);
-    }
+	/**
+	 * Generate ASN.1 structure.
+	 *
+	 * @return Sequence
+	 */
+	public function toASN1(): Sequence
+	{
+		$elements = array_map(
+			function (Target $target) {
+				return $target->toASN1();
+			}, $this->_targets);
+		return new Sequence(...$elements);
+	}
 
-    /**
-     * @see \Countable::count()
-     *
-     * @return int
-     */
-    public function count(): int
-    {
-        return count($this->_targets);
-    }
+	/**
+	 * @see \Countable::count()
+	 *
+	 * @return int
+	 */
+	public function count(): int
+	{
+		return count($this->_targets);
+	}
 
-    /**
-     * Get iterator for targets.
-     *
-     * @see \IteratorAggregate::getIterator()
-     *
-     * @return \ArrayIterator
-     */
-    public function getIterator(): \ArrayIterator
-    {
-        return new \ArrayIterator($this->_targets);
-    }
+	/**
+	 * Get iterator for targets.
+	 *
+	 * @see \IteratorAggregate::getIterator()
+	 *
+	 * @return \ArrayIterator
+	 */
+	public function getIterator(): \ArrayIterator
+	{
+		return new \ArrayIterator($this->_targets);
+	}
 
-    /**
-     * Get all targets of given type.
-     *
-     * @param int $type
-     *
-     * @return Target[]
-     */
-    protected function _allOfType(int $type): array
-    {
-        return array_values(
-            array_filter($this->_targets,
-                function (Target $target) use ($type) {
-                    return $target->type() === $type;
-                }));
-    }
+	/**
+	 * Get all targets of given type.
+	 *
+	 * @param int $type
+	 *
+	 * @return Target[]
+	 */
+	protected function _allOfType(int $type): array
+	{
+		return array_values(
+			array_filter($this->_targets,
+				function (Target $target) use ($type) {
+					return $target->type() === $type;
+				}));
+	}
 }

Spacing +4 added lines, -4 removed lines

@@ -1,6 +1,6 @@ 
 <?php
 
-declare(strict_types = 1);
+declare(strict_types=1);
 
 namespace Sop\X509\Certificate\Extension\Target;
 
@@ -41,7 +41,7 @@ 
     public static function fromASN1(Sequence $seq): self
     {
         $targets = array_map(
-            function (UnspecifiedType $el) {
+            function(UnspecifiedType $el) {
                 return Target::fromASN1($el->asTagged());
             }, $seq->elements());
         return new self(...$targets);
@@ -102,7 +102,7 @@ 
     public function toASN1(): Sequence
     {
         $elements = array_map(
-            function (Target $target) {
+            function(Target $target) {
                 return $target->toASN1();
             }, $this->_targets);
         return new Sequence(...$elements);
@@ -141,7 +141,7 @@ 
     {
         return array_values(
             array_filter($this->_targets,
-                function (Target $target) use ($type) {
+                function(Target $target) use ($type) {
                     return $target->type() === $type;
                 }));
     }