Binding::getCurrentBinding() - Code Metrics - Inspection of "Create RelayStateTrait" - simplesamlphp/saml2 - Measure and Improve Code Quality continuously with Scrutinizer

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by Tim

created 2025-03-15 22:42 UTC

Binding::getCurrentBinding() C

↳ Parent: Binding

Complexity

Conditions	16
Paths	24

Size

Total Lines	59
Code Lines	36

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
cc	16
eloc	36
nc	24
nop	1
dl	0
loc	59
rs	5.5666
c	0
b	0
f	0

How to fix Long Method Complexity

<?php

declare(strict_types=1);

namespace SimpleSAML\SAML2;

use Psr\Http\Message\{ResponseInterface, ServerRequestInterface};
use SimpleSAML\SAML2\Assert\Assert;
use SimpleSAML\SAML2\Binding\{HTTPArtifact, HTTPPost, HTTPRedirect, SOAP};
use SimpleSAML\SAML2\Constants as C;
use SimpleSAML\SAML2\Exception\Protocol\UnsupportedBindingException;
use SimpleSAML\SAML2\XML\samlp\AbstractMessage;

use function array_key_exists;
use function array_keys;
use function array_map;
use function explode;
use function implode;
use function var_export;

/**
 * Base class for SAML 2 bindings.
 *
 * @package simplesamlphp/saml2
 */
abstract class Binding
{
    /**
     * The destination of messages.
     *
     * This can be null, in which case the destination in the message is used.
     * @var string|null
     */
    protected ?string $destination = null;


    /**
     * Retrieve a binding with the given URN.
     *
     * Will throw an exception if it is unable to locate the binding.
     *
     * @param string $urn The URN of the binding.
     * @throws \SimpleSAML\SAML2\Exception\Protocol\UnsupportedBindingException
     * @return \SimpleSAML\SAML2\Binding The binding.
     */
    public static function getBinding(string $urn): Binding
    {
        switch ($urn) {
            case C::BINDING_HTTP_POST:
            case C::BINDING_HOK_SSO:
                return new HTTPPost();
            case C::BINDING_HTTP_REDIRECT:
                return new HTTPRedirect();
            case C::BINDING_HTTP_ARTIFACT:
                return new HTTPArtifact();
            // ECP ACS is defined with the PAOS binding, but as the IdP, we
            // talk to the ECP using SOAP -- if support for ECP as an SP is
            // implemented, this logic may need to change
            case C::BINDING_PAOS:
                return new SOAP();
            default:
                throw new UnsupportedBindingException('Unsupported binding: ' . var_export($urn, true));
        }
    }


    /**
     * Guess the current binding.
     *
     * This function guesses the current binding and creates an instance
     * of \SimpleSAML\SAML2\Binding matching that binding.
     *
     * An exception will be thrown if it is unable to guess the binding.
     *
     * @param \Psr\Http\Message\ServerRequestInterface $request
     * @throws \SimpleSAML\SAML2\Exception\Protocol\UnsupportedBindingException
     * @return \SimpleSAML\SAML2\Binding The binding.
     */
    public static function getCurrentBinding(ServerRequestInterface $request): Binding
    {
        $method = $request->getMethod();

        switch ($method) {
            case 'GET':
                $query = $request->getQueryParams();
                if (array_key_exists('SAMLRequest', $query) || array_key_exists('SAMLResponse', $query)) {
                    return new Binding\HTTPRedirect();
                } elseif (array_key_exists('SAMLart', $query)) {
                    return new Binding\HTTPArtifact();
                }
                break;

            case 'POST':
                $contentType = null;
                if ($request->hasHeader('Content-Type')) {
                    $contentType = $request->getHeader('Content-Type')[0];
                    $contentType = explode(';', $contentType);
                    $contentType = $contentType[0]; /* Remove charset. */
                }

                $query = $request->getParsedBody();
                if (array_key_exists('SAMLRequest', $query) || array_key_exists('SAMLResponse', $query)) {
                    return new Binding\HTTPPost();
                } elseif (array_key_exists('SAMLart', $query)) {
                    return new Binding\HTTPArtifact();
                } else {
                    /**
                     * The registration information for text/xml is in all respects the same
                     * as that given for application/xml (RFC 7303 - Section 9.1)
                     */
                    if (
                        ($contentType === 'text/xml' || $contentType === 'application/xml')
                        // See paragraph 3.2.3 of Binding for SAML2 (OASIS)
                        || ($request->hasHeader('SOAPAction')
                            && $request->getHeader('SOAPAction')[0] === 'http://www.oasis-open.org/committees/security')
                    ) {
                        return new Binding\SOAP();
                    }
                }
                break;
        }

        $logger = Utils::getContainer()->getLogger();
        $logger->warning('Unable to find the SAML 2 binding used for this request.');
        $logger->warning('Request method: ' . var_export($method, true));

        if (!empty($query)) {
            $logger->warning(
                $method . " parameters: '" . implode("', '", array_map('addslashes', array_keys($query))) . "'",
            );
        }

        if ($request->hasHeader('Content-Type')) {
            $logger->warning('Content-Type: ' . var_export($request->getHeader('Content-Type')[0], true));
        }

        throw new UnsupportedBindingException('Unable to find the SAML 2 binding used for this request.');
    }


    /**
     * Retrieve the destination of a message.
     *
     * @return string|null $destination The destination the message will be delivered to.
     */
    public function getDestination(): ?string
    {
        return $this->destination;
    }


    /**
     * Override the destination of a message.
     *
     * Set to null to use the destination set in the message.
     *
     * @param string|null $destination The destination the message should be delivered to.
     */
    public function setDestination(?string $destination = null): void
    {
        $this->destination = $destination;
    }


    /**
     * Send a SAML 2 message.
     *
     * This function will send a message using the specified binding.
     * The message will be delivered to the destination set in the message.
     *
     * @param \SimpleSAML\SAML2\XML\samlp\AbstractMessage $message The message which should be sent.
     * @return \Psr\Http\Message\ResponseInterface
     */
    abstract public function send(AbstractMessage $message): ResponseInterface;


    /**
     * Receive a SAML 2 message.
     *
     * This function will extract the message from the current request.
     * An exception will be thrown if we are unable to process the message.
     *
     * @param \Psr\Http\Message\ServerRequestInterface $request
     * @return \SimpleSAML\SAML2\XML\samlp\AbstractMessage The received message.
     */
    abstract public function receive(ServerRequestInterface $request): AbstractMessage;
}


1			<?php
2
3			declare(strict_types=1);
4
5			namespace SimpleSAML\SAML2;
6
7			use Psr\Http\Message\{ResponseInterface, ServerRequestInterface};
8			use SimpleSAML\SAML2\Assert\Assert;
9			use SimpleSAML\SAML2\Binding\{HTTPArtifact, HTTPPost, HTTPRedirect, SOAP};
10			use SimpleSAML\SAML2\Constants as C;
11			use SimpleSAML\SAML2\Exception\Protocol\UnsupportedBindingException;
12			use SimpleSAML\SAML2\XML\samlp\AbstractMessage;
13
14			use function array_key_exists;
15			use function array_keys;
16			use function array_map;
17			use function explode;
18			use function implode;
19			use function var_export;
20
21			/**
22			* Base class for SAML 2 bindings.
23			*
24			* @package simplesamlphp/saml2
25			*/
26			abstract class Binding
27			{
28			/**
29			* The destination of messages.
30			*
31			* This can be null, in which case the destination in the message is used.
32			* @var string\|null
33			*/
34			protected ?string $destination = null;
35
36
37			/**
38			* Retrieve a binding with the given URN.
39			*
40			* Will throw an exception if it is unable to locate the binding.
41			*
42			* @param string $urn The URN of the binding.
43			* @throws \SimpleSAML\SAML2\Exception\Protocol\UnsupportedBindingException
44			* @return \SimpleSAML\SAML2\Binding The binding.
45			*/
46			public static function getBinding(string $urn): Binding
47			{
48			switch ($urn) {
49			case C::BINDING_HTTP_POST:
50			case C::BINDING_HOK_SSO:
51			return new HTTPPost();
52			case C::BINDING_HTTP_REDIRECT:
53			return new HTTPRedirect();
54			case C::BINDING_HTTP_ARTIFACT:
55			return new HTTPArtifact();
56			// ECP ACS is defined with the PAOS binding, but as the IdP, we
57			// talk to the ECP using SOAP -- if support for ECP as an SP is
58			// implemented, this logic may need to change
59			case C::BINDING_PAOS:
60			return new SOAP();
61			default:
62			throw new UnsupportedBindingException('Unsupported binding: ' . var_export($urn, true));
63			}
64			}
65
66
67			/**
68			* Guess the current binding.
69			*
70			* This function guesses the current binding and creates an instance
71			* of \SimpleSAML\SAML2\Binding matching that binding.
72			*
73			* An exception will be thrown if it is unable to guess the binding.
74			*
75			* @param \Psr\Http\Message\ServerRequestInterface $request
76			* @throws \SimpleSAML\SAML2\Exception\Protocol\UnsupportedBindingException
77			* @return \SimpleSAML\SAML2\Binding The binding.
78			*/
79			public static function getCurrentBinding(ServerRequestInterface $request): Binding
80			{
81			$method = $request->getMethod();
82
83			switch ($method) {
84			case 'GET':
85			$query = $request->getQueryParams();
86			if (array_key_exists('SAMLRequest', $query) \|\| array_key_exists('SAMLResponse', $query)) {
87			return new Binding\HTTPRedirect();
88			} elseif (array_key_exists('SAMLart', $query)) {
89			return new Binding\HTTPArtifact();
90			}
91			break;
92
93			case 'POST':
94			$contentType = null;
95			if ($request->hasHeader('Content-Type')) {
96			$contentType = $request->getHeader('Content-Type')[0];
97			$contentType = explode(';', $contentType);
98			$contentType = $contentType[0]; /* Remove charset. */
99			}
100
101			$query = $request->getParsedBody();
102			if (array_key_exists('SAMLRequest', $query) \|\| array_key_exists('SAMLResponse', $query)) {
103			return new Binding\HTTPPost();
104			} elseif (array_key_exists('SAMLart', $query)) {
105			return new Binding\HTTPArtifact();
106			} else {
107			/**
108			* The registration information for text/xml is in all respects the same
109			* as that given for application/xml (RFC 7303 - Section 9.1)
110			*/
111			if (
112			($contentType === 'text/xml' \|\| $contentType === 'application/xml')
113			// See paragraph 3.2.3 of Binding for SAML2 (OASIS)
114			\|\| ($request->hasHeader('SOAPAction')
115			&& $request->getHeader('SOAPAction')[0] === 'http://www.oasis-open.org/committees/security')
116			) {
117			return new Binding\SOAP();
118			}
119			}
120			break;
121			}
122
123			$logger = Utils::getContainer()->getLogger();
124			$logger->warning('Unable to find the SAML 2 binding used for this request.');
125			$logger->warning('Request method: ' . var_export($method, true));
126
127			if (!empty($query)) {
128			$logger->warning(
129			$method . " parameters: '" . implode("', '", array_map('addslashes', array_keys($query))) . "'",
130			);
131			}
132
133			if ($request->hasHeader('Content-Type')) {
134			$logger->warning('Content-Type: ' . var_export($request->getHeader('Content-Type')[0], true));
135			}
136
137			throw new UnsupportedBindingException('Unable to find the SAML 2 binding used for this request.');
138			}
139
140
141			/**
142			* Retrieve the destination of a message.
143			*
144			* @return string\|null $destination The destination the message will be delivered to.
145			*/
146			public function getDestination(): ?string
147			{
148			return $this->destination;
149			}
150
151
152			/**
153			* Override the destination of a message.
154			*
155			* Set to null to use the destination set in the message.
156			*
157			* @param string\|null $destination The destination the message should be delivered to.
158			*/
159			public function setDestination(?string $destination = null): void
160			{
161			$this->destination = $destination;
162			}
163
164
165			/**
166			* Send a SAML 2 message.
167			*
168			* This function will send a message using the specified binding.
169			* The message will be delivered to the destination set in the message.
170			*
171			* @param \SimpleSAML\SAML2\XML\samlp\AbstractMessage $message The message which should be sent.
172			* @return \Psr\Http\Message\ResponseInterface
173			*/
174			abstract public function send(AbstractMessage $message): ResponseInterface;
175
176
177			/**
178			* Receive a SAML 2 message.
179			*
180			* This function will extract the message from the current request.
181			* An exception will be thrown if we are unable to process the message.
182			*
183			* @param \Psr\Http\Message\ServerRequestInterface $request
184			* @return \SimpleSAML\SAML2\XML\samlp\AbstractMessage The received message.
185			*/
186			abstract public function receive(ServerRequestInterface $request): AbstractMessage;
187			}
188

simplesamlphp / saml2

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Binding::getCurrentBinding() C

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