Extension::_extnValue() - Code Metrics - Inspection of "Add support for extensions with non-DER value" - sop/x509 - Measure and Improve Code Quality continuously with Scrutinizer

Passed

Push — master ( 035734...405cf3 )

by Joni

created 2018-11-05 08:24 UTC

Extension::_extnValue() A

↳ Parent: Extension

Complexity

Conditions	1
Paths	1

Size

Total Lines

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	2
CRAP Score	1

Importance

Changes

Metric	Value
dl	0
loc	4
ccs	2
cts	2
cp	1
rs	10
c	0
b	0
f	0
cc	1
nc	1
nop	0
crap	1

<?php
declare(strict_types = 1);

namespace X509\Certificate\Extension;

use ASN1\Element;
use ASN1\Type\Constructed\Sequence;
use ASN1\Type\Primitive\Boolean;
use ASN1\Type\Primitive\ObjectIdentifier;
use ASN1\Type\Primitive\OctetString;

/**
 * Base class for certificate extensions.
 *
 * @link https://tools.ietf.org/html/rfc5280#section-4.2
 * @link https://tools.ietf.org/html/rfc5280#section-4.1
 */
abstract class Extension
{
    // OID's from standard certificate extensions
    const OID_OBSOLETE_AUTHORITY_KEY_IDENTIFIER = "2.5.29.1";
    const OID_OBSOLETE_KEY_ATTRIBUTES = "2.5.29.2";
    const OID_OBSOLETE_CERTIFICATE_POLICIES = "2.5.29.3";
    const OID_OBSOLETE_KEY_USAGE_RESTRICTION = "2.5.29.4";
    const OID_OBSOLETE_POLICY_MAPPING = "2.5.29.5";
    const OID_OBSOLETE_SUBTREES_CONSTRAINT = "2.5.29.6";
    const OID_OBSOLETE_SUBJECT_ALT_NAME = "2.5.29.7";
    const OID_OBSOLETE_ISSUER_ALT_NAME = "2.5.29.8";
    const OID_SUBJECT_DIRECTORY_ATTRIBUTES = "2.5.29.9";
    const OID_OBSOLETE_BASIC_CONSTRAINTS = "2.5.29.10";
    const OID_SUBJECT_KEY_IDENTIFIER = "2.5.29.14";
    const OID_KEY_USAGE = "2.5.29.15";
    const OID_PRIVATE_KEY_USAGE_PERIOD = "2.5.29.16";
    const OID_SUBJECT_ALT_NAME = "2.5.29.17";
    const OID_ISSUER_ALT_NAME = "2.5.29.18";
    const OID_BASIC_CONSTRAINTS = "2.5.29.19";
    const OID_CRL_NUMBER = "2.5.29.20";
    const OID_REASON_CODE = "2.5.29.21";
    const OID_OBSOLETE_EXPIRATION_DATE = "2.5.29.22";
    const OID_INSTRUCTION_CODE = "2.5.29.23";
    const OID_INVALIDITY_DATE = "2.5.29.24";
    const OID_OBSOLETE_CRL_DISTRIBUTION_POINTS = "2.5.29.25";
    const OID_OBSOLETE_ISSUING_DISTRIBUTION_POINT = "2.5.29.26";
    const OID_DELTA_CRL_INDICATOR = "2.5.29.27";
    const OID_ISSUING_DISTRIBUTION_POINT = "2.5.29.28";
    const OID_CERTIFICATE_ISSUER = "2.5.29.29";
    const OID_NAME_CONSTRAINTS = "2.5.29.30";
    const OID_CRL_DISTRIBUTION_POINTS = "2.5.29.31";
    const OID_CERTIFICATE_POLICIES = "2.5.29.32";
    const OID_POLICY_MAPPINGS = "2.5.29.33";
    const OID_OBSOLETE_POLICY_CONSTRAINTS = "2.5.29.34";
    const OID_AUTHORITY_KEY_IDENTIFIER = "2.5.29.35";
    const OID_POLICY_CONSTRAINTS = "2.5.29.36";
    const OID_EXT_KEY_USAGE = "2.5.29.37";
    const OID_AUTHORITY_ATTRIBUTE_IDENTIFIER = "2.5.29.38";
    const OID_ROLE_SPEC_CERT_IDENTIFIER = "2.5.29.39";
    const OID_CRL_STREAM_IDENTIFIER = "2.5.29.40";
    const OID_BASIC_ATT_CONSTRAINTS = "2.5.29.41";
    const OID_DELEGATED_NAME_CONSTRAINTS = "2.5.29.42";
    const OID_TIME_SPECIFICATION = "2.5.29.43";
    const OID_CRL_SCOPE = "2.5.29.44";
    const OID_STATUS_REFERRALS = "2.5.29.45";
    const OID_FRESHEST_CRL = "2.5.29.46";
    const OID_ORDERED_LIST = "2.5.29.47";
    const OID_ATTRIBUTE_DESCRIPTOR = "2.5.29.48";
    const OID_USER_NOTICE = "2.5.29.49";
    const OID_SOA_IDENTIFIER = "2.5.29.50";
    const OID_BASE_UPDATE_TIME = "2.5.29.51";
    const OID_ACCEPTABLE_CERT_POLICIES = "2.5.29.52";
    const OID_DELTA_INFO = "2.5.29.53";
    const OID_INHIBIT_ANY_POLICY = "2.5.29.54";
    const OID_TARGET_INFORMATION = "2.5.29.55";
    const OID_NO_REV_AVAIL = "2.5.29.56";
    const OID_ACCEPTABLE_PRIVILEGE_POLICIES = "2.5.29.57";
    const OID_TO_BE_REVOKED = "2.5.29.58";
    const OID_REVOKED_GROUPS = "2.5.29.59";
    const OID_EXPIRED_CERTS_ON_CRL = "2.5.29.60";
    const OID_INDIRECT_ISSUER = "2.5.29.61";
    const OID_NO_ASSERTION = "2.5.29.62";
    const OID_AA_ISSUING_DISTRIBUTION_POINT = "2.5.29.63";
    const OID_ISSUED_ON_BEHALF_OF = "2.5.29.64";
    const OID_SINGLE_USE = "2.5.29.65";
    const OID_GROUP_AC = "2.5.29.66";
    const OID_ALLOWED_ATT_ASS = "2.5.29.67";
    const OID_ATTRIBUTE_MAPPINGS = "2.5.29.68";
    const OID_HOLDER_NAME_CONSTRAINTS = "2.5.29.69";
    
    // OID's from private certificate extensions arc
    const OID_AUTHORITY_INFORMATION_ACCESS = "1.3.6.1.5.5.7.1.1";
    const OID_AA_CONTROLS = "1.3.6.1.5.5.7.1.6";
    const OID_SUBJECT_INFORMATION_ACCESS = "1.3.6.1.5.5.7.1.11";
    const OID_LOGOTYPE = "1.3.6.1.5.5.7.1.12";
    
    /**
     * Mapping from extension ID to implementation class name.
     *
     * @internal
     *
     * @var array
     */
    const MAP_OID_TO_CLASS = array(
        /* @formatter:off */
        self::OID_AUTHORITY_KEY_IDENTIFIER => AuthorityKeyIdentifierExtension::class,
        self::OID_SUBJECT_KEY_IDENTIFIER => SubjectKeyIdentifierExtension::class,
        self::OID_KEY_USAGE => KeyUsageExtension::class,
        self::OID_CERTIFICATE_POLICIES => CertificatePoliciesExtension::class,
        self::OID_POLICY_MAPPINGS => PolicyMappingsExtension::class,
        self::OID_SUBJECT_ALT_NAME => SubjectAlternativeNameExtension::class,
        self::OID_ISSUER_ALT_NAME => IssuerAlternativeNameExtension::class,
        self::OID_SUBJECT_DIRECTORY_ATTRIBUTES => SubjectDirectoryAttributesExtension::class,
        self::OID_BASIC_CONSTRAINTS => BasicConstraintsExtension::class,
        self::OID_NAME_CONSTRAINTS => NameConstraintsExtension::class,
        self::OID_POLICY_CONSTRAINTS => PolicyConstraintsExtension::class,
        self::OID_EXT_KEY_USAGE => ExtendedKeyUsageExtension::class,
        self::OID_CRL_DISTRIBUTION_POINTS => CRLDistributionPointsExtension::class,
        self::OID_INHIBIT_ANY_POLICY => InhibitAnyPolicyExtension::class,
        self::OID_FRESHEST_CRL => FreshestCRLExtension::class,
        self::OID_NO_REV_AVAIL => NoRevocationAvailableExtension::class,
        self::OID_TARGET_INFORMATION => TargetInformationExtension::class,
        self::OID_AUTHORITY_INFORMATION_ACCESS => AuthorityInformationAccessExtension::class,
        self::OID_AA_CONTROLS => AAControlsExtension::class,
        self::OID_SUBJECT_INFORMATION_ACCESS => SubjectInformationAccessExtension::class
        /* @formatter:on */
    );
    
    /**
     * Mapping from extensions ID to short name.
     *
     * @internal
     *
     * @var array
     */
    const MAP_OID_TO_NAME = array(
        /* @formatter:off */
        self::OID_AUTHORITY_KEY_IDENTIFIER => "authorityKeyIdentifier",
        self::OID_SUBJECT_KEY_IDENTIFIER => "subjectKeyIdentifier",
        self::OID_KEY_USAGE => "keyUsage",
        self::OID_PRIVATE_KEY_USAGE_PERIOD => "privateKeyUsagePeriod",
        self::OID_CERTIFICATE_POLICIES => "certificatePolicies",
        self::OID_POLICY_MAPPINGS => "policyMappings",
        self::OID_SUBJECT_ALT_NAME => "subjectAltName",
        self::OID_ISSUER_ALT_NAME => "issuerAltName",
        self::OID_SUBJECT_DIRECTORY_ATTRIBUTES => "subjectDirectoryAttributes",
        self::OID_BASIC_CONSTRAINTS => "basicConstraints",
        self::OID_NAME_CONSTRAINTS => "nameConstraints",
        self::OID_POLICY_CONSTRAINTS => "policyConstraints",
        self::OID_EXT_KEY_USAGE => "extKeyUsage",
        self::OID_CRL_DISTRIBUTION_POINTS => "cRLDistributionPoints",
        self::OID_INHIBIT_ANY_POLICY => "inhibitAnyPolicy",
        self::OID_FRESHEST_CRL => "freshestCRL",
        self::OID_NO_REV_AVAIL => "noRevAvail",
        self::OID_TARGET_INFORMATION => "targetInformation",
        self::OID_AUTHORITY_INFORMATION_ACCESS => "authorityInfoAccess",
        self::OID_AA_CONTROLS => "aaControls",
        self::OID_SUBJECT_INFORMATION_ACCESS => "subjectInfoAccess",
        self::OID_LOGOTYPE => "logotype"
        /* @formatter:on */
    );
    
    /**
     * Extension's OID.
     *
     * @var string $_oid
     */
    protected $_oid;
    
    /**
     * Whether extension is critical.
     *
     * @var bool $_critical
     */
    protected $_critical;
    
    /**
     * Get ASN.1 structure of the extension value.
     *
     * @return Element
     */
    abstract protected function _valueASN1();
    
    /**
     * Parse extension value from DER.
     *
     * @param string $data DER data
     * @param bool $critical Whether extension is critical
     * @throws \BadMethodCallException
     * @return self
     */
    protected static function _fromDER(string $data, bool $critical)
    {
        throw new \BadMethodCallException(
            __FUNCTION__ . " must be implemented in derived class.");
    }
    
    /**
     * Constructor.
     *
     * @param string $oid Extension OID
     * @param bool $critical Whether extension is critical
     */
    public function __construct(string $oid, bool $critical)
    {
        $this->_oid = $oid;
        $this->_critical = $critical;
    }
    
    /**
     * Initialize from ASN.1.
     *
     * @param Sequence $seq
     * @return self
     */
    public static function fromASN1(Sequence $seq): Extension
    {
        $extnID = $seq->at(0)
            ->asObjectIdentifier()
            ->oid();
        $critical = false;
        $idx = 1;
        if ($seq->has($idx, Element::TYPE_BOOLEAN)) {
            $critical = $seq->at($idx++)
                ->asBoolean()
                ->value();
        }
        $data = $seq->at($idx)
            ->asOctetString()
            ->string();
        if (array_key_exists($extnID, self::MAP_OID_TO_CLASS)) {
            $cls = self::MAP_OID_TO_CLASS[$extnID];
            return $cls::_fromDER($data, $critical);
        }
        return UnknownExtension::fromRawString($extnID, $critical, $data);
    }
    
    /**
     * Get extension OID.
     *
     * @return string
     */
    public function oid(): string
    {
        return $this->_oid;
    }
    
    /**
     * Check whether extension is critical.
     *
     * @return bool
     */
    public function isCritical(): bool
    {
        return $this->_critical;
    }
    
    /**
     * Generate ASN.1 structure.
     *
     * @return Sequence
     */
    public function toASN1(): Sequence
    {
        $elements = array(new ObjectIdentifier($this->_oid));
        if ($this->_critical) {
            $elements[] = new Boolean(true);
        }
        $elements[] = $this->_extnValue();
        return new Sequence(...$elements);
    }
    
    /**
     * Get the extnValue element.
     *
     * @return OctetString
     */
    protected function _extnValue(): OctetString
    {
        return new OctetString($this->_valueASN1()->toDER());
    }
    
    /**
     * Get short name of the extension.
     *
     * @return string
     */
    public function extensionName(): string
    {
        if (array_key_exists($this->_oid, self::MAP_OID_TO_NAME)) {
            return self::MAP_OID_TO_NAME[$this->_oid];
        }
        return $this->oid();
    }
    
    /**
     *
     * @return string
     */
    public function __toString(): string
    {
        return $this->extensionName();
    }
}


1		<?php
2		declare(strict_types = 1);
3
4		namespace X509\Certificate\Extension;
5
6		use ASN1\Element;
7		use ASN1\Type\Constructed\Sequence;
8		use ASN1\Type\Primitive\Boolean;
9		use ASN1\Type\Primitive\ObjectIdentifier;
10		use ASN1\Type\Primitive\OctetString;
11
12		/**
13		* Base class for certificate extensions.
14		*
15		* @link https://tools.ietf.org/html/rfc5280#section-4.2
16		* @link https://tools.ietf.org/html/rfc5280#section-4.1
17		*/
18		abstract class Extension
19		{
20		// OID's from standard certificate extensions
21		const OID_OBSOLETE_AUTHORITY_KEY_IDENTIFIER = "2.5.29.1";
22		const OID_OBSOLETE_KEY_ATTRIBUTES = "2.5.29.2";
23		const OID_OBSOLETE_CERTIFICATE_POLICIES = "2.5.29.3";
24		const OID_OBSOLETE_KEY_USAGE_RESTRICTION = "2.5.29.4";
25		const OID_OBSOLETE_POLICY_MAPPING = "2.5.29.5";
26		const OID_OBSOLETE_SUBTREES_CONSTRAINT = "2.5.29.6";
27		const OID_OBSOLETE_SUBJECT_ALT_NAME = "2.5.29.7";
28		const OID_OBSOLETE_ISSUER_ALT_NAME = "2.5.29.8";
29		const OID_SUBJECT_DIRECTORY_ATTRIBUTES = "2.5.29.9";
30		const OID_OBSOLETE_BASIC_CONSTRAINTS = "2.5.29.10";
31		const OID_SUBJECT_KEY_IDENTIFIER = "2.5.29.14";
32		const OID_KEY_USAGE = "2.5.29.15";
33		const OID_PRIVATE_KEY_USAGE_PERIOD = "2.5.29.16";
34		const OID_SUBJECT_ALT_NAME = "2.5.29.17";
35		const OID_ISSUER_ALT_NAME = "2.5.29.18";
36		const OID_BASIC_CONSTRAINTS = "2.5.29.19";
37		const OID_CRL_NUMBER = "2.5.29.20";
38		const OID_REASON_CODE = "2.5.29.21";
39		const OID_OBSOLETE_EXPIRATION_DATE = "2.5.29.22";
40		const OID_INSTRUCTION_CODE = "2.5.29.23";
41		const OID_INVALIDITY_DATE = "2.5.29.24";
42		const OID_OBSOLETE_CRL_DISTRIBUTION_POINTS = "2.5.29.25";
43		const OID_OBSOLETE_ISSUING_DISTRIBUTION_POINT = "2.5.29.26";
44		const OID_DELTA_CRL_INDICATOR = "2.5.29.27";
45		const OID_ISSUING_DISTRIBUTION_POINT = "2.5.29.28";
46		const OID_CERTIFICATE_ISSUER = "2.5.29.29";
47		const OID_NAME_CONSTRAINTS = "2.5.29.30";
48		const OID_CRL_DISTRIBUTION_POINTS = "2.5.29.31";
49		const OID_CERTIFICATE_POLICIES = "2.5.29.32";
50		const OID_POLICY_MAPPINGS = "2.5.29.33";
51		const OID_OBSOLETE_POLICY_CONSTRAINTS = "2.5.29.34";
52		const OID_AUTHORITY_KEY_IDENTIFIER = "2.5.29.35";
53		const OID_POLICY_CONSTRAINTS = "2.5.29.36";
54		const OID_EXT_KEY_USAGE = "2.5.29.37";
55		const OID_AUTHORITY_ATTRIBUTE_IDENTIFIER = "2.5.29.38";
56		const OID_ROLE_SPEC_CERT_IDENTIFIER = "2.5.29.39";
57		const OID_CRL_STREAM_IDENTIFIER = "2.5.29.40";
58		const OID_BASIC_ATT_CONSTRAINTS = "2.5.29.41";
59		const OID_DELEGATED_NAME_CONSTRAINTS = "2.5.29.42";
60		const OID_TIME_SPECIFICATION = "2.5.29.43";
61		const OID_CRL_SCOPE = "2.5.29.44";
62		const OID_STATUS_REFERRALS = "2.5.29.45";
63		const OID_FRESHEST_CRL = "2.5.29.46";
64		const OID_ORDERED_LIST = "2.5.29.47";
65		const OID_ATTRIBUTE_DESCRIPTOR = "2.5.29.48";
66		const OID_USER_NOTICE = "2.5.29.49";
67		const OID_SOA_IDENTIFIER = "2.5.29.50";
68		const OID_BASE_UPDATE_TIME = "2.5.29.51";
69		const OID_ACCEPTABLE_CERT_POLICIES = "2.5.29.52";
70		const OID_DELTA_INFO = "2.5.29.53";
71		const OID_INHIBIT_ANY_POLICY = "2.5.29.54";
72		const OID_TARGET_INFORMATION = "2.5.29.55";
73		const OID_NO_REV_AVAIL = "2.5.29.56";
74		const OID_ACCEPTABLE_PRIVILEGE_POLICIES = "2.5.29.57";
75		const OID_TO_BE_REVOKED = "2.5.29.58";
76		const OID_REVOKED_GROUPS = "2.5.29.59";
77		const OID_EXPIRED_CERTS_ON_CRL = "2.5.29.60";
78		const OID_INDIRECT_ISSUER = "2.5.29.61";
79		const OID_NO_ASSERTION = "2.5.29.62";
80		const OID_AA_ISSUING_DISTRIBUTION_POINT = "2.5.29.63";
81		const OID_ISSUED_ON_BEHALF_OF = "2.5.29.64";
82		const OID_SINGLE_USE = "2.5.29.65";
83		const OID_GROUP_AC = "2.5.29.66";
84		const OID_ALLOWED_ATT_ASS = "2.5.29.67";
85		const OID_ATTRIBUTE_MAPPINGS = "2.5.29.68";
86		const OID_HOLDER_NAME_CONSTRAINTS = "2.5.29.69";
87
88		// OID's from private certificate extensions arc
89		const OID_AUTHORITY_INFORMATION_ACCESS = "1.3.6.1.5.5.7.1.1";
90		const OID_AA_CONTROLS = "1.3.6.1.5.5.7.1.6";
91		const OID_SUBJECT_INFORMATION_ACCESS = "1.3.6.1.5.5.7.1.11";
92		const OID_LOGOTYPE = "1.3.6.1.5.5.7.1.12";
93
94		/**
95		* Mapping from extension ID to implementation class name.
96		*
97		* @internal
98		*
99		* @var array
100		*/
101		const MAP_OID_TO_CLASS = array(
102		/* @formatter:off */
103		self::OID_AUTHORITY_KEY_IDENTIFIER => AuthorityKeyIdentifierExtension::class,
104		self::OID_SUBJECT_KEY_IDENTIFIER => SubjectKeyIdentifierExtension::class,
105		self::OID_KEY_USAGE => KeyUsageExtension::class,
106		self::OID_CERTIFICATE_POLICIES => CertificatePoliciesExtension::class,
107		self::OID_POLICY_MAPPINGS => PolicyMappingsExtension::class,
108		self::OID_SUBJECT_ALT_NAME => SubjectAlternativeNameExtension::class,
109		self::OID_ISSUER_ALT_NAME => IssuerAlternativeNameExtension::class,
110		self::OID_SUBJECT_DIRECTORY_ATTRIBUTES => SubjectDirectoryAttributesExtension::class,
111		self::OID_BASIC_CONSTRAINTS => BasicConstraintsExtension::class,
112		self::OID_NAME_CONSTRAINTS => NameConstraintsExtension::class,
113		self::OID_POLICY_CONSTRAINTS => PolicyConstraintsExtension::class,
114		self::OID_EXT_KEY_USAGE => ExtendedKeyUsageExtension::class,
115		self::OID_CRL_DISTRIBUTION_POINTS => CRLDistributionPointsExtension::class,
116		self::OID_INHIBIT_ANY_POLICY => InhibitAnyPolicyExtension::class,
117		self::OID_FRESHEST_CRL => FreshestCRLExtension::class,
118		self::OID_NO_REV_AVAIL => NoRevocationAvailableExtension::class,
119		self::OID_TARGET_INFORMATION => TargetInformationExtension::class,
120		self::OID_AUTHORITY_INFORMATION_ACCESS => AuthorityInformationAccessExtension::class,
121		self::OID_AA_CONTROLS => AAControlsExtension::class,
122		self::OID_SUBJECT_INFORMATION_ACCESS => SubjectInformationAccessExtension::class
123		/* @formatter:on */
124		);
125
126		/**
127		* Mapping from extensions ID to short name.
128		*
129		* @internal
130		*
131		* @var array
132		*/
133		const MAP_OID_TO_NAME = array(
134		/* @formatter:off */
135		self::OID_AUTHORITY_KEY_IDENTIFIER => "authorityKeyIdentifier",
136		self::OID_SUBJECT_KEY_IDENTIFIER => "subjectKeyIdentifier",
137		self::OID_KEY_USAGE => "keyUsage",
138		self::OID_PRIVATE_KEY_USAGE_PERIOD => "privateKeyUsagePeriod",
139		self::OID_CERTIFICATE_POLICIES => "certificatePolicies",
140		self::OID_POLICY_MAPPINGS => "policyMappings",
141		self::OID_SUBJECT_ALT_NAME => "subjectAltName",
142		self::OID_ISSUER_ALT_NAME => "issuerAltName",
143		self::OID_SUBJECT_DIRECTORY_ATTRIBUTES => "subjectDirectoryAttributes",
144		self::OID_BASIC_CONSTRAINTS => "basicConstraints",
145		self::OID_NAME_CONSTRAINTS => "nameConstraints",
146		self::OID_POLICY_CONSTRAINTS => "policyConstraints",
147		self::OID_EXT_KEY_USAGE => "extKeyUsage",
148		self::OID_CRL_DISTRIBUTION_POINTS => "cRLDistributionPoints",
149		self::OID_INHIBIT_ANY_POLICY => "inhibitAnyPolicy",
150		self::OID_FRESHEST_CRL => "freshestCRL",
151		self::OID_NO_REV_AVAIL => "noRevAvail",
152		self::OID_TARGET_INFORMATION => "targetInformation",
153		self::OID_AUTHORITY_INFORMATION_ACCESS => "authorityInfoAccess",
154		self::OID_AA_CONTROLS => "aaControls",
155		self::OID_SUBJECT_INFORMATION_ACCESS => "subjectInfoAccess",
156		self::OID_LOGOTYPE => "logotype"
157		/* @formatter:on */
158		);
159
160		/**
161		* Extension's OID.
162		*
163		* @var string $_oid
164		*/
165		protected $_oid;
166
167		/**
168		* Whether extension is critical.
169		*
170		* @var bool $_critical
171		*/
172		protected $_critical;
173
174		/**
175		* Get ASN.1 structure of the extension value.
176		*
177		* @return Element
178		*/
179		abstract protected function _valueASN1();
180
181		/**
182		* Parse extension value from DER.
183		*
184		* @param string $data DER data
185		* @param bool $critical Whether extension is critical
186		* @throws \BadMethodCallException
187		* @return self
188		*/
189	1	protected static function _fromDER(string $data, bool $critical)
190		{
191	1	throw new \BadMethodCallException(
192	1	__FUNCTION__ . " must be implemented in derived class.");
193		}
194
195		/**
196		* Constructor.
197		*
198		* @param string $oid Extension OID
199		* @param bool $critical Whether extension is critical
200		*/
201	98	public function __construct(string $oid, bool $critical)
202		{
203	98	$this->_oid = $oid;
204	98	$this->_critical = $critical;
205	98	}
206
207		/**
208		* Initialize from ASN.1.
209		*
210		* @param Sequence $seq
211		* @return self
212		*/
213	51	public static function fromASN1(Sequence $seq): Extension
214		{
215	51	$extnID = $seq->at(0)
216	51	->asObjectIdentifier()
217	51	->oid();
218	51	$critical = false;
219	51	$idx = 1;
220	51	if ($seq->has($idx, Element::TYPE_BOOLEAN)) {
221	22	$critical = $seq->at($idx++)
222	22	->asBoolean()
223	22	->value();
224		}
225	51	$data = $seq->at($idx)
226	51	->asOctetString()
227	51	->string();
228	51	if (array_key_exists($extnID, self::MAP_OID_TO_CLASS)) {
229	50	$cls = self::MAP_OID_TO_CLASS[$extnID];
230	50	return $cls::_fromDER($data, $critical);
231		}
232	1	return UnknownExtension::fromRawString($extnID, $critical, $data);
233		}
234
235		/**
236		* Get extension OID.
237		*
238		* @return string
239		*/
240	66	public function oid(): string
241		{
242	66	return $this->_oid;
243		}
244
245		/**
246		* Check whether extension is critical.
247		*
248		* @return bool
249		*/
250	20	public function isCritical(): bool
251		{
252	20	return $this->_critical;
253		}
254
255		/**
256		* Generate ASN.1 structure.
257		*
258		* @return Sequence
259		*/
260	88	public function toASN1(): Sequence
261		{
262	88	$elements = array(new ObjectIdentifier($this->_oid));
263	88	if ($this->_critical) {
264	58	$elements[] = new Boolean(true);
265		}
266	88	$elements[] = $this->_extnValue();
267	83	return new Sequence(...$elements);
268		}
269
270		/**
271		* Get the extnValue element.
272		*
273		* @return OctetString
274		*/
275	86	protected function _extnValue(): OctetString
276		{
277	86	return new OctetString($this->_valueASN1()->toDER());
278		}
279
280		/**
281		* Get short name of the extension.
282		*
283		* @return string
284		*/
285	3	public function extensionName(): string
286		{
287	3	if (array_key_exists($this->_oid, self::MAP_OID_TO_NAME)) {
288	2	return self::MAP_OID_TO_NAME[$this->_oid];
289		}
290	1	return $this->oid();
291		}
292
293		/**
294		*
295		* @return string
296		*/
297	1	public function __toString(): string
298		{
299	1	return $this->extensionName();
300		}
301		}
302

sop / x509

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Extension::_extnValue() A

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