WebAuthnServer::createAuthenticationContext() - Code Metrics - Inspection of "Fix tests" - madwizard-org/webauthn-server - Measure and Improve Code Quality continuously with Scrutinizer

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Push — master ( 5271f3...ae4caa )

by Thomas

created 2020-09-24 18:54 UTC

WebAuthnServer::createAuthenticationContext() A

↳ Parent: Project

Complexity

Conditions	5
Paths	8

Size

Total Lines	24
Code Lines	13

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	12
CRAP Score	5.0729

Importance

Changes	2
Bugs	0	Features	1

Metric	Value
cc	5
eloc	13
nc	8
nop	2
dl	0
loc	24
ccs	12
cts	14
cp	0.8571
crap	5.0729
rs	9.5222
c	2
b	0
f	1

<?php

namespace MadWizard\WebAuthn\Server;

use MadWizard\WebAuthn\Attestation\Registry\AttestationFormatRegistryInterface;
use MadWizard\WebAuthn\Config\RelyingPartyInterface;
use MadWizard\WebAuthn\Credential\CredentialId;
use MadWizard\WebAuthn\Credential\CredentialRegistration;
use MadWizard\WebAuthn\Credential\CredentialStoreInterface;
use MadWizard\WebAuthn\Credential\UserHandle;
use MadWizard\WebAuthn\Dom\AuthenticationExtensionsClientInputs;
use MadWizard\WebAuthn\Dom\PublicKeyCredentialCreationOptions;
use MadWizard\WebAuthn\Dom\PublicKeyCredentialDescriptor;
use MadWizard\WebAuthn\Dom\PublicKeyCredentialInterface;
use MadWizard\WebAuthn\Dom\PublicKeyCredentialParameters;
use MadWizard\WebAuthn\Dom\PublicKeyCredentialRequestOptions;
use MadWizard\WebAuthn\Dom\PublicKeyCredentialRpEntity;
use MadWizard\WebAuthn\Dom\PublicKeyCredentialUserEntity;
use MadWizard\WebAuthn\Dom\UserVerificationRequirement;
use MadWizard\WebAuthn\Exception\CredentialIdExistsException;
use MadWizard\WebAuthn\Exception\NoCredentialsException;
use MadWizard\WebAuthn\Exception\UntrustedException;
use MadWizard\WebAuthn\Exception\VerificationException;
use MadWizard\WebAuthn\Exception\WebAuthnException;
use MadWizard\WebAuthn\Extension\ExtensionRegistryInterface;
use MadWizard\WebAuthn\Format\ByteBuffer;
use MadWizard\WebAuthn\Metadata\MetadataResolverInterface;
use MadWizard\WebAuthn\Policy\PolicyInterface;
use MadWizard\WebAuthn\Policy\Trust\TrustDecisionManagerInterface;
use MadWizard\WebAuthn\Server\Authentication\AuthenticationContext;
use MadWizard\WebAuthn\Server\Authentication\AuthenticationOptions;
use MadWizard\WebAuthn\Server\Authentication\AuthenticationRequest;
use MadWizard\WebAuthn\Server\Authentication\AuthenticationResultInterface;
use MadWizard\WebAuthn\Server\Authentication\AuthenticationVerifier;
use MadWizard\WebAuthn\Server\Registration\RegistrationContext;
use MadWizard\WebAuthn\Server\Registration\RegistrationOptions;
use MadWizard\WebAuthn\Server\Registration\RegistrationRequest;
use MadWizard\WebAuthn\Server\Registration\RegistrationResultInterface;
use MadWizard\WebAuthn\Server\Registration\RegistrationVerifier;

class WebAuthnServer implements ServerInterface
{
    /**
     * @var RelyingPartyInterface
     */
    private $relyingParty;

    /**
     * @var PolicyInterface
     */
    private $policy;

    /**
     * @var CredentialStoreInterface
     */
    private $credentialStore;

    /**
     * @var AttestationFormatRegistryInterface
     */
    private $formatRegistry;

    /**
     * @var MetadataResolverInterface
     */
    private $metadataResolver;

    /**
     * @var TrustDecisionManagerInterface
     */
    private $trustDecisionManager;

    /**
     * @var ExtensionRegistryInterface
     */
    private $extensionRegistry;

    public function __construct(
        RelyingPartyInterface $relyingParty,
        PolicyInterface $policy,
        CredentialStoreInterface $credentialStore,
        AttestationFormatRegistryInterface $formatRegistry,
        MetadataResolverInterface $metadataResolver,
        TrustDecisionManagerInterface $trustDecisionManager,
        ExtensionRegistryInterface $extensionRegistry
    ) {
        $this->relyingParty = $relyingParty;
        $this->policy = $policy;
        $this->credentialStore = $credentialStore;
        $this->formatRegistry = $formatRegistry;
        $this->metadataResolver = $metadataResolver;
        $this->trustDecisionManager = $trustDecisionManager;
        $this->extensionRegistry = $extensionRegistry;
    }

    public function startRegistration(RegistrationOptions $options): RegistrationRequest
    {
        $challenge = $this->createChallenge();

        $creationOptions = new PublicKeyCredentialCreationOptions(
            PublicKeyCredentialRpEntity::fromRelyingParty($this->relyingParty),
            $this->createUserEntity($options->getUser()),
            $challenge,
            $this->getCredentialParameters()
        );

        $creationOptions->setAttestation($options->getAttestation());
        $creationOptions->setAuthenticatorSelection($options->getAuthenticatorSelection());
        $extensions = $options->getExtensionInputs();
        if (count($extensions) > 0) {
            // TODO: check if supported extension + check operation supported
            // TODO: reuse same code for authentication?
            $creationOptions->setExtensions(
                AuthenticationExtensionsClientInputs::fromArray($extensions)
            );
        }

        if ($options->getExcludeExistingCredentials()) {
            $credentialIds = $this->credentialStore->getUserCredentialIds($options->getUser()->getUserHandle());
            foreach ($credentialIds as $credential) {
                $creationOptions->addExcludeCredential(
                    new PublicKeyCredentialDescriptor($credential->toBuffer())
                );
            }
        }

        $context = $this->createRegistrationContext($options, $creationOptions);
        return new RegistrationRequest($creationOptions, $context);
    }

    private function createRegistrationContext(RegistrationOptions $regOptions, PublicKeyCredentialCreationOptions $options): RegistrationContext
    {
        $origin = $this->relyingParty->getOrigin();
        $rpId = $this->relyingParty->getEffectiveId();

        // TODO: mismatch $rp and rp in $options? Check?
        $context = new RegistrationContext($options->getChallenge(), $origin, $rpId, UserHandle::fromBuffer($options->getUserEntity()->getId()));

        $context->setUserPresenceRequired($this->policy->isUserPresenceRequired());
        $authSel = $options->getAuthenticatorSelection();
        if ($authSel !== null && $authSel->getUserVerification() === UserVerificationRequirement::REQUIRED) {
            $context->setUserVerificationRequired(true);
        }

        foreach ($regOptions->getExtensionInputs() as $input) {
            $context->addExtensionInput($input);
        }
        return $context;
    }

    /**
     * @param PublicKeyCredentialInterface $credential Attestation credential response from the client
     *
     * @throws CredentialIdExistsException
     * @throws VerificationException
     */
    public function finishRegistration(PublicKeyCredentialInterface $credential, RegistrationContext $context): RegistrationResultInterface
    {
        $verifier = new RegistrationVerifier($this->formatRegistry, $this->extensionRegistry);
        $registrationResult = $verifier->verify($credential, $context);

        $response = $credential->getResponse()->asAttestationResponse();

        // 15. If validation is successful, obtain a list of acceptable trust anchors (attestation root certificates or
        //     ECDAA-Issuer public keys) for that attestation type and attestation statement format fmt, from a trusted
        //     source or from policy.

        $metadata = $this->metadataResolver->getMetadata($registrationResult);
        $registrationResult = $registrationResult->withMetadata($metadata);

        // 16. Assess the attestation trustworthiness using the outputs of the verification procedure in step 14,
        //     as follows:
        //       If self attestation was used, check if self attestation is acceptable under Relying Party policy.
        //       If ECDAA was used, verify that the identifier of the ECDAA-Issuer public key used is included in the
        //       set of acceptable trust anchors obtained in step 15.
        //       Otherwise, use the X.509 certificates returned by the verification procedure to verify that the
        //       attestation public key correctly chains up to an acceptable root certificate.

        try {
            $this->trustDecisionManager->verifyTrust($registrationResult, $metadata);
        } catch (UntrustedException $e) {
            throw new VerificationException('The attestation is not trusted: ' . $e->getReason(), 0, $e);
        }

        // 17. Check that the credentialId is not yet registered to any other user. If registration is requested for a
        //     credential that is already registered to a different user, the Relying Party SHOULD fail this
        //     registration ceremony, or it MAY decide to accept the registration, e.g. while deleting the older
        //     registration.
        if ($this->credentialStore->findCredential($registrationResult->getCredentialId())) {
            throw new CredentialIdExistsException('Credential is already registered.');
        }

        // 18. If the attestation statement attStmt verified successfully and is found to be trustworthy, then register
        //     the new credential with the account that was denoted in the options.user passed to create(), by
        //     associating it with the credentialId and credentialPublicKey in the attestedCredentialData in authData,
        //     as appropriate for the Relying Party's system.
        // 19. If the attestation statement attStmt successfully verified but is not trustworthy per step 16 above,
        //     the Relying Party SHOULD fail the registration ceremony.
        //
        //    NOTE: However, if permitted by policy, the Relying Party MAY register the credential ID and credential
        //    public key but treat the credential as one with self attestation (see §6.3.3 Attestation Types).
        //    If doing so, the Relying Party is asserting there is no cryptographic proof that the public key credential
        //    has been generated by a particular authenticator model. See [FIDOSecRef] and [UAFProtocol] for a more
        //    detailed discussion.
        //
        //    Verification of attestation objects requires that the Relying Party has a trusted method of determining
        //    acceptable trust anchors in step 15 above. Also, if certificates are being used, the Relying Party MUST
        //    have access to certificate status information for the intermediate CA certificates. The Relying Party MUST
        //    also be able to build the attestation certificate chain if the client did not provide this chain in the
        //    attestation information.

        $registration = new CredentialRegistration(
            $registrationResult->getCredentialId(),
            $registrationResult->getPublicKey(),
            $context->getUserHandle(),
            $response->getAttestationObject(),
            $registrationResult->getSignatureCounter()
        );
        $this->credentialStore->registerCredential($registration);
        return $registrationResult;
    }

    public function startAuthentication(AuthenticationOptions $options): AuthenticationRequest
    {
        $challenge = $this->createChallenge();

        $requestOptions = new PublicKeyCredentialRequestOptions($challenge);
        $requestOptions->setRpId($this->relyingParty->getId());
        $uv = $options->getUserVerification();
        if ($uv !== UserVerificationRequirement::DEFAULT) {
            $requestOptions->setUserVerification($uv);
        }
        $requestOptions->setTimeout($options->getTimeout());

        $this->addAllowCredentials($options, $requestOptions);

        $extensions = $options->getExtensionInputs();
        if (count($extensions) > 0) {
            $requestOptions->setExtensions(
                AuthenticationExtensionsClientInputs::fromArray($extensions)
            );
        }

        $context = $this->createAuthenticationContext($options, $requestOptions);
        return new AuthenticationRequest($requestOptions, $context);
    }

    private function createAuthenticationContext(AuthenticationOptions $authOptions, PublicKeyCredentialRequestOptions $options): AuthenticationContext
    {
        $origin = $this->relyingParty->getOrigin();
        $rpId = $this->relyingParty->getEffectiveId();

        // TODO: mismatch $rp and rp in $policy? Check?
        $context = new AuthenticationContext($options->getChallenge(), $origin, $rpId, $authOptions->getUserHandle());

        if ($options->getUserVerification() === UserVerificationRequirement::REQUIRED) {
            $context->setUserVerificationRequired(true);
        }

        $context->setUserPresenceRequired($this->policy->isUserPresenceRequired());

        $allowCredentials = $options->getAllowCredentials();
        if ($allowCredentials !== null) {
            foreach ($allowCredentials as $credential) {
                $context->addAllowCredentialId(CredentialId::fromBuffer($credential->getId()));
            }
        }
        foreach ($authOptions->getExtensionInputs() as $input) {
            $context->addExtensionInput($input);
        }
        return $context;
    }

    /**
     * @param PublicKeyCredentialInterface $credential Assertion credential response from the client
     *
     * @throws VerificationException
     */
    public function finishAuthentication(PublicKeyCredentialInterface $credential, AuthenticationContext $context): AuthenticationResultInterface
    {
        $verifier = new AuthenticationVerifier($this->credentialStore, $this->extensionRegistry);

        $authenticationResult = $verifier->verifyAuthenticatonAssertion($credential, $context);

        return $authenticationResult;
    }

    /**
     * @throws WebAuthnException
     */
    private function addAllowCredentials(AuthenticationOptions $options, PublicKeyCredentialRequestOptions $requestOptions): void
    {
        $userHandle = $options->getUserHandle();
        if ($userHandle !== null) {
            $credentialIds = $this->credentialStore->getUserCredentialIds($userHandle);
            if (count($credentialIds) === 0) {
                throw new NoCredentialsException('User being authenticated has no credentials.');
            }
            foreach ($credentialIds as $credentialId) {
                $descriptor = new PublicKeyCredentialDescriptor($credentialId->toBuffer());
                $requestOptions->addAllowedCredential($descriptor);
            }
        }

        $credentialIds = $options->getAllowCredentials();
//        $transports = AuthenticatorTransport::allKnownTransports(); // TODO: from config
        if (count($credentialIds) > 0) {
            foreach ($credentialIds as $credential) {
                $credentialId = $credential->toBuffer();
                $descriptor = new PublicKeyCredentialDescriptor($credentialId);
//                foreach ($transports as $transport) {
//                    $descriptor->addTransport($transport);
//                }
                $requestOptions->addAllowedCredential($descriptor);
            }
        }
    }

    private function createUserEntity(UserIdentityInterface $user): PublicKeyCredentialUserEntity
    {
        return new PublicKeyCredentialUserEntity(
            $user->getUsername(),
            $user->getUserHandle()->toBuffer(),
            $user->getDisplayName()
        );
    }

    /**
     * @return PublicKeyCredentialParameters[]
     */
    private function getCredentialParameters(): array
    {
        $parameters = [];
        $algorithms = $this->policy->getAllowedAlgorithms();        // TODO: verify server side?
        foreach ($algorithms as $algorithm) {
            $parameters[] = new PublicKeyCredentialParameters($algorithm);
        }
        return $parameters;
    }

    private function createChallenge(): ByteBuffer
    {
        return ByteBuffer::randomBuffer($this->policy->getChallengeLength());
    }
}


1		<?php
2
3		namespace MadWizard\WebAuthn\Server;
4
5		use MadWizard\WebAuthn\Attestation\Registry\AttestationFormatRegistryInterface;
6		use MadWizard\WebAuthn\Config\RelyingPartyInterface;
7		use MadWizard\WebAuthn\Credential\CredentialId;
8		use MadWizard\WebAuthn\Credential\CredentialRegistration;
9		use MadWizard\WebAuthn\Credential\CredentialStoreInterface;
10		use MadWizard\WebAuthn\Credential\UserHandle;
11		use MadWizard\WebAuthn\Dom\AuthenticationExtensionsClientInputs;
12		use MadWizard\WebAuthn\Dom\PublicKeyCredentialCreationOptions;
13		use MadWizard\WebAuthn\Dom\PublicKeyCredentialDescriptor;
14		use MadWizard\WebAuthn\Dom\PublicKeyCredentialInterface;
15		use MadWizard\WebAuthn\Dom\PublicKeyCredentialParameters;
16		use MadWizard\WebAuthn\Dom\PublicKeyCredentialRequestOptions;
17		use MadWizard\WebAuthn\Dom\PublicKeyCredentialRpEntity;
18		use MadWizard\WebAuthn\Dom\PublicKeyCredentialUserEntity;
19		use MadWizard\WebAuthn\Dom\UserVerificationRequirement;
20		use MadWizard\WebAuthn\Exception\CredentialIdExistsException;
21		use MadWizard\WebAuthn\Exception\NoCredentialsException;
22		use MadWizard\WebAuthn\Exception\UntrustedException;
23		use MadWizard\WebAuthn\Exception\VerificationException;
24		use MadWizard\WebAuthn\Exception\WebAuthnException;
25		use MadWizard\WebAuthn\Extension\ExtensionRegistryInterface;
26		use MadWizard\WebAuthn\Format\ByteBuffer;
27		use MadWizard\WebAuthn\Metadata\MetadataResolverInterface;
28		use MadWizard\WebAuthn\Policy\PolicyInterface;
29		use MadWizard\WebAuthn\Policy\Trust\TrustDecisionManagerInterface;
30		use MadWizard\WebAuthn\Server\Authentication\AuthenticationContext;
31		use MadWizard\WebAuthn\Server\Authentication\AuthenticationOptions;
32		use MadWizard\WebAuthn\Server\Authentication\AuthenticationRequest;
33		use MadWizard\WebAuthn\Server\Authentication\AuthenticationResultInterface;
34		use MadWizard\WebAuthn\Server\Authentication\AuthenticationVerifier;
35		use MadWizard\WebAuthn\Server\Registration\RegistrationContext;
36		use MadWizard\WebAuthn\Server\Registration\RegistrationOptions;
37		use MadWizard\WebAuthn\Server\Registration\RegistrationRequest;
38		use MadWizard\WebAuthn\Server\Registration\RegistrationResultInterface;
39		use MadWizard\WebAuthn\Server\Registration\RegistrationVerifier;
40
41		class WebAuthnServer implements ServerInterface
42		{
43		/**
44		* @var RelyingPartyInterface
45		*/
46		private $relyingParty;
47
48		/**
49		* @var PolicyInterface
50		*/
51		private $policy;
52
53		/**
54		* @var CredentialStoreInterface
55		*/
56		private $credentialStore;
57
58		/**
59		* @var AttestationFormatRegistryInterface
60		*/
61		private $formatRegistry;
62
63		/**
64		* @var MetadataResolverInterface
65		*/
66		private $metadataResolver;
67
68		/**
69		* @var TrustDecisionManagerInterface
70		*/
71		private $trustDecisionManager;
72
73		/**
74		* @var ExtensionRegistryInterface
75		*/
76		private $extensionRegistry;
77
78	18	public function __construct(
79		RelyingPartyInterface $relyingParty,
80		PolicyInterface $policy,
81		CredentialStoreInterface $credentialStore,
82		AttestationFormatRegistryInterface $formatRegistry,
83		MetadataResolverInterface $metadataResolver,
84		TrustDecisionManagerInterface $trustDecisionManager,
85		ExtensionRegistryInterface $extensionRegistry
86		) {
87	18	$this->relyingParty = $relyingParty;
88	18	$this->policy = $policy;
89	18	$this->credentialStore = $credentialStore;
90	18	$this->formatRegistry = $formatRegistry;
91	18	$this->metadataResolver = $metadataResolver;
92	18	$this->trustDecisionManager = $trustDecisionManager;
93	18	$this->extensionRegistry = $extensionRegistry;
94	18	}
95
96	1	public function startRegistration(RegistrationOptions $options): RegistrationRequest
97		{
98	1	$challenge = $this->createChallenge();
99
100	1	$creationOptions = new PublicKeyCredentialCreationOptions(
101	1	PublicKeyCredentialRpEntity::fromRelyingParty($this->relyingParty),
102	1	$this->createUserEntity($options->getUser()),
103		$challenge,
104	1	$this->getCredentialParameters()
105		);
106
107	1	$creationOptions->setAttestation($options->getAttestation());
108	1	$creationOptions->setAuthenticatorSelection($options->getAuthenticatorSelection());
109	1	$extensions = $options->getExtensionInputs();
110	1	if (count($extensions) > 0) {
111		// TODO: check if supported extension + check operation supported
112		// TODO: reuse same code for authentication?
113		$creationOptions->setExtensions(
114		AuthenticationExtensionsClientInputs::fromArray($extensions)
115		);
116		}
117
118	1	if ($options->getExcludeExistingCredentials()) {
119		$credentialIds = $this->credentialStore->getUserCredentialIds($options->getUser()->getUserHandle());
120		foreach ($credentialIds as $credential) {
121		$creationOptions->addExcludeCredential(
122		new PublicKeyCredentialDescriptor($credential->toBuffer())
123		);
124		}
125		}
126
127	1	$context = $this->createRegistrationContext($options, $creationOptions);
128	1	return new RegistrationRequest($creationOptions, $context);
129		}
130
131	1	private function createRegistrationContext(RegistrationOptions $regOptions, PublicKeyCredentialCreationOptions $options): RegistrationContext
132		{
133	1	$origin = $this->relyingParty->getOrigin();
134	1	$rpId = $this->relyingParty->getEffectiveId();
135
136		// TODO: mismatch $rp and rp in $options? Check?
137	1	$context = new RegistrationContext($options->getChallenge(), $origin, $rpId, UserHandle::fromBuffer($options->getUserEntity()->getId()));
138
139	1	$context->setUserPresenceRequired($this->policy->isUserPresenceRequired());
140	1	$authSel = $options->getAuthenticatorSelection();
141	1	if ($authSel !== null && $authSel->getUserVerification() === UserVerificationRequirement::REQUIRED) {
142		$context->setUserVerificationRequired(true);
143		}
144
145	1	foreach ($regOptions->getExtensionInputs() as $input) {
146		$context->addExtensionInput($input);
147		}
148	1	return $context;
149		}
150
151		/**
152		* @param PublicKeyCredentialInterface $credential Attestation credential response from the client
153		*
154		* @throws CredentialIdExistsException
155		* @throws VerificationException
156		*/
157	1	public function finishRegistration(PublicKeyCredentialInterface $credential, RegistrationContext $context): RegistrationResultInterface
158		{
159	1	$verifier = new RegistrationVerifier($this->formatRegistry, $this->extensionRegistry);
160	1	$registrationResult = $verifier->verify($credential, $context);
161
162	1	$response = $credential->getResponse()->asAttestationResponse();
163
164		// 15. If validation is successful, obtain a list of acceptable trust anchors (attestation root certificates or
165		// ECDAA-Issuer public keys) for that attestation type and attestation statement format fmt, from a trusted
166		// source or from policy.
167
168	1	$metadata = $this->metadataResolver->getMetadata($registrationResult);
169	1	$registrationResult = $registrationResult->withMetadata($metadata);
170
171		// 16. Assess the attestation trustworthiness using the outputs of the verification procedure in step 14,
172		// as follows:
173		// If self attestation was used, check if self attestation is acceptable under Relying Party policy.
174		// If ECDAA was used, verify that the identifier of the ECDAA-Issuer public key used is included in the
175		// set of acceptable trust anchors obtained in step 15.
176		// Otherwise, use the X.509 certificates returned by the verification procedure to verify that the
177		// attestation public key correctly chains up to an acceptable root certificate.
178
179		try {
180	1	$this->trustDecisionManager->verifyTrust($registrationResult, $metadata);
181		} catch (UntrustedException $e) {
182		throw new VerificationException('The attestation is not trusted: ' . $e->getReason(), 0, $e);
183		}
184
185		// 17. Check that the credentialId is not yet registered to any other user. If registration is requested for a
186		// credential that is already registered to a different user, the Relying Party SHOULD fail this
187		// registration ceremony, or it MAY decide to accept the registration, e.g. while deleting the older
188		// registration.
189	1	if ($this->credentialStore->findCredential($registrationResult->getCredentialId())) {
190		throw new CredentialIdExistsException('Credential is already registered.');
191		}
192
193		// 18. If the attestation statement attStmt verified successfully and is found to be trustworthy, then register
194		// the new credential with the account that was denoted in the options.user passed to create(), by
195		// associating it with the credentialId and credentialPublicKey in the attestedCredentialData in authData,
196		// as appropriate for the Relying Party's system.
197		// 19. If the attestation statement attStmt successfully verified but is not trustworthy per step 16 above,
198		// the Relying Party SHOULD fail the registration ceremony.
199		//
200		// NOTE: However, if permitted by policy, the Relying Party MAY register the credential ID and credential
201		// public key but treat the credential as one with self attestation (see §6.3.3 Attestation Types).
202		// If doing so, the Relying Party is asserting there is no cryptographic proof that the public key credential
203		// has been generated by a particular authenticator model. See [FIDOSecRef] and [UAFProtocol] for a more
204		// detailed discussion.
205		//
206		// Verification of attestation objects requires that the Relying Party has a trusted method of determining
207		// acceptable trust anchors in step 15 above. Also, if certificates are being used, the Relying Party MUST
208		// have access to certificate status information for the intermediate CA certificates. The Relying Party MUST
209		// also be able to build the attestation certificate chain if the client did not provide this chain in the
210		// attestation information.
211
212	1	$registration = new CredentialRegistration(
213	1	$registrationResult->getCredentialId(),
214	1	$registrationResult->getPublicKey(),
215	1	$context->getUserHandle(),
216	1	$response->getAttestationObject(),
217	1	$registrationResult->getSignatureCounter()
218		);
219	1	$this->credentialStore->registerCredential($registration);
220	1	return $registrationResult;
221		}
222
223	1	public function startAuthentication(AuthenticationOptions $options): AuthenticationRequest
224		{
225	1	$challenge = $this->createChallenge();
226
227	1	$requestOptions = new PublicKeyCredentialRequestOptions($challenge);
228	1	$requestOptions->setRpId($this->relyingParty->getId());
229	1	$uv = $options->getUserVerification();
230	1	if ($uv !== UserVerificationRequirement::DEFAULT) {
231		$requestOptions->setUserVerification($uv);
232		}
233	1	$requestOptions->setTimeout($options->getTimeout());
234
235	1	$this->addAllowCredentials($options, $requestOptions);
236
237	1	$extensions = $options->getExtensionInputs();
238	1	if (count($extensions) > 0) {
239		$requestOptions->setExtensions(
240		AuthenticationExtensionsClientInputs::fromArray($extensions)
241		);
242		}
243
244	1	$context = $this->createAuthenticationContext($options, $requestOptions);
245	1	return new AuthenticationRequest($requestOptions, $context);
246		}
247
248	1	private function createAuthenticationContext(AuthenticationOptions $authOptions, PublicKeyCredentialRequestOptions $options): AuthenticationContext
249		{
250	1	$origin = $this->relyingParty->getOrigin();
251	1	$rpId = $this->relyingParty->getEffectiveId();
252
253		// TODO: mismatch $rp and rp in $policy? Check?
254	1	$context = new AuthenticationContext($options->getChallenge(), $origin, $rpId, $authOptions->getUserHandle());
255
256	1	if ($options->getUserVerification() === UserVerificationRequirement::REQUIRED) {
257		$context->setUserVerificationRequired(true);
258		}
259
260	1	$context->setUserPresenceRequired($this->policy->isUserPresenceRequired());
261
262	1	$allowCredentials = $options->getAllowCredentials();
263	1	if ($allowCredentials !== null) {
264	1	foreach ($allowCredentials as $credential) {
265	1	$context->addAllowCredentialId(CredentialId::fromBuffer($credential->getId()));
266		}
267		}
268	1	foreach ($authOptions->getExtensionInputs() as $input) {
269		$context->addExtensionInput($input);
270		}
271	1	return $context;
272		}
273
274		/**
275		* @param PublicKeyCredentialInterface $credential Assertion credential response from the client
276		*
277		* @throws VerificationException
278		*/
279	14	public function finishAuthentication(PublicKeyCredentialInterface $credential, AuthenticationContext $context): AuthenticationResultInterface
280		{
281	14	$verifier = new AuthenticationVerifier($this->credentialStore, $this->extensionRegistry);
282
283	14	$authenticationResult = $verifier->verifyAuthenticatonAssertion($credential, $context);
284
285	4	return $authenticationResult;
286		}
287
288		/**
289		* @throws WebAuthnException
290		*/
291	1	private function addAllowCredentials(AuthenticationOptions $options, PublicKeyCredentialRequestOptions $requestOptions): void
292		{
293	1	$userHandle = $options->getUserHandle();
294	1	if ($userHandle !== null) {
295		$credentialIds = $this->credentialStore->getUserCredentialIds($userHandle);
296		if (count($credentialIds) === 0) {
297		throw new NoCredentialsException('User being authenticated has no credentials.');
298		}
299		foreach ($credentialIds as $credentialId) {
300		$descriptor = new PublicKeyCredentialDescriptor($credentialId->toBuffer());
301		$requestOptions->addAllowedCredential($descriptor);
302		}
303		}
304
305	1	$credentialIds = $options->getAllowCredentials();
306		// $transports = AuthenticatorTransport::allKnownTransports(); // TODO: from config
307	1	if (count($credentialIds) > 0) {
308	1	foreach ($credentialIds as $credential) {
309	1	$credentialId = $credential->toBuffer();
310	1	$descriptor = new PublicKeyCredentialDescriptor($credentialId);
311		// foreach ($transports as $transport) {
312		// $descriptor->addTransport($transport);
313		// }
314	1	$requestOptions->addAllowedCredential($descriptor);
315		}
316		}
317	1	}
318
319	1	private function createUserEntity(UserIdentityInterface $user): PublicKeyCredentialUserEntity
320		{
321	1	return new PublicKeyCredentialUserEntity(
322	1	$user->getUsername(),
323	1	$user->getUserHandle()->toBuffer(),
324	1	$user->getDisplayName()
325		);
326		}
327
328		/**
329		* @return PublicKeyCredentialParameters[]
330		*/
331	1	private function getCredentialParameters(): array
332		{
333	1	$parameters = [];
334	1	$algorithms = $this->policy->getAllowedAlgorithms(); // TODO: verify server side?
335	1	foreach ($algorithms as $algorithm) {
336	1	$parameters[] = new PublicKeyCredentialParameters($algorithm);
337		}
338	1	return $parameters;
339		}
340
341	2	private function createChallenge(): ByteBuffer
342		{
343	2	return ByteBuffer::randomBuffer($this->policy->getChallengeLength());
344		}
345		}
346

madwizard-org / webauthn-server

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WebAuthnServer::createAuthenticationContext() A

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