Issues in Processor.php (master) - Issues in master - Youshido/GraphQL - Measure and Improve Code Quality continuously with Scrutinizer

Issues (234)

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Cross-Site Scripting

Cross-Site Scripting enables an attacker to inject code into the response of a web-request that is viewed by other users. It can for example be used to bypass access controls, or even to take over other users' accounts.

File Exposure

File Exposure allows an attacker to gain access to local files that he should not be able to access. These files can for example include database credentials, or other configuration files.

File Manipulation

File Manipulation enables an attacker to write custom data to files. This potentially leads to injection of arbitrary code on the server.

Object Injection

Object Injection enables an attacker to inject an object into PHP code, and can lead to arbitrary code execution, file exposure, or file manipulation attacks.

Code Injection

Code Injection enables an attacker to execute arbitrary code on the server.

Response Splitting

Response Splitting can be used to send arbitrary responses.

File Inclusion

File Inclusion enables an attacker to inject custom files into PHP's file loading mechanism, either explicitly passed to include, or for example via PHP's auto-loading mechanism.

Command Injection

Command Injection enables an attacker to inject a shell command that is execute with the privileges of the web-server. This can be used to expose sensitive data, or gain access of your server.

SQL Injection

SQL Injection enables an attacker to execute arbitrary SQL code on your database server gaining access to user data, or manipulating user data.

XPath Injection

XPath Injection enables an attacker to modify the parts of XML document that are read. If that XML document is for example used for authentication, this can lead to further vulnerabilities similar to SQL Injection.

LDAP Injection

LDAP Injection enables an attacker to inject LDAP statements potentially granting permission to run unauthorized queries, or modify content inside the LDAP tree.

Header Injection

Other Vulnerability

This category comprises other attack vectors such as manipulating the PHP runtime, loading custom extensions, freezing the runtime, or similar.

Regex Injection

Regex Injection enables an attacker to execute arbitrary code in your PHP process.

XML Injection

XML Injection enables an attacker to read files on your local filesystem including configuration files, or can be abused to freeze your web-server process.

Variable Injection

Variable Injection enables an attacker to overwrite program variables with custom data, and can lead to further vulnerabilities.

Unfortunately, the security analysis is currently not available for your project. If you are a non-commercial open-source project, please contact support to gain access.

src/Execution/Processor.php (11 issues)

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<?php
/**
 * Date: 03.11.16
 *
 * @author Portey Vasil <[email protected]>
 */

namespace Youshido\GraphQL\Execution;


use Youshido\GraphQL\Exception\ResolveException;
use Youshido\GraphQL\Execution\Container\Container;
use Youshido\GraphQL\Execution\Context\ExecutionContext;
use Youshido\GraphQL\Execution\Visitor\MaxComplexityQueryVisitor;
use Youshido\GraphQL\Field\Field;
use Youshido\GraphQL\Field\FieldInterface;
use Youshido\GraphQL\Field\InputField;
use Youshido\GraphQL\Parser\Ast\ArgumentValue\InputList as AstInputList;
use Youshido\GraphQL\Parser\Ast\ArgumentValue\InputObject as AstInputObject;
use Youshido\GraphQL\Parser\Ast\ArgumentValue\Literal as AstLiteral;
use Youshido\GraphQL\Parser\Ast\ArgumentValue\VariableReference;
use Youshido\GraphQL\Parser\Ast\Field as AstField;
use Youshido\GraphQL\Parser\Ast\FragmentReference;
use Youshido\GraphQL\Parser\Ast\Interfaces\FieldInterface as AstFieldInterface;
use Youshido\GraphQL\Parser\Ast\Mutation as AstMutation;
use Youshido\GraphQL\Parser\Ast\Query as AstQuery;
use Youshido\GraphQL\Parser\Ast\TypedFragmentReference;
use Youshido\GraphQL\Parser\Parser;
use Youshido\GraphQL\Schema\AbstractSchema;
use Youshido\GraphQL\Type\AbstractType;
use Youshido\GraphQL\Type\Enum\AbstractEnumType;
use Youshido\GraphQL\Type\InputObject\AbstractInputObjectType;
use Youshido\GraphQL\Type\InterfaceType\AbstractInterfaceType;
use Youshido\GraphQL\Type\ListType\AbstractListType;
use Youshido\GraphQL\Type\Object\AbstractObjectType;
use Youshido\GraphQL\Type\Scalar\AbstractScalarType;
use Youshido\GraphQL\Type\TypeMap;
use Youshido\GraphQL\Type\Union\AbstractUnionType;
use Youshido\GraphQL\Validator\RequestValidator\RequestValidator;
use Youshido\GraphQL\Validator\ResolveValidator\ResolveValidator;
use Youshido\GraphQL\Validator\ResolveValidator\ResolveValidatorInterface;

class Processor
{

    const TYPE_NAME_QUERY = '__typename';

    /** @var ExecutionContext */
    protected $executionContext;

    /** @var ResolveValidatorInterface */
    protected $resolveValidator;

    /** @var  array */
    protected $data;

    /** @var int */
    protected $maxComplexity;

    /** @var array DeferredResult[] */
    protected $deferredResultsLeaf = [];

    /** @var array DeferredResult[] */
    protected $deferredResultsComplex = [];

    public function __construct(AbstractSchema $schema)
    {
        if (empty($this->executionContext)) {
            $this->executionContext = new ExecutionContext($schema);
            $this->executionContext->setContainer(new Container());
        }

        $this->resolveValidator = new ResolveValidator($this->executionContext);
    }

    public function processPayload($payload, $variables = [], $reducers = [])
    {
        $this->data = [];

        try {
            $this->parseAndCreateRequest($payload, $variables);

            if ($this->maxComplexity) {
                $reducers[] = new MaxComplexityQueryVisitor($this->maxComplexity);
            }

            if ($reducers) {

                $reducer = new Reducer();
                $reducer->reduceQuery($this->executionContext, $reducers);
            }

            foreach ($this->executionContext->getRequest()->getAllOperations() as $query) {
                if ($operationResult = $this->resolveQuery($query)) {
                    $this->data = array_replace_recursive($this->data, $operationResult);
                };
            }

            // If the processor found any deferred results, resolve them now.
            if (!empty($this->data) && (!empty($this->deferredResultsLeaf) || !empty($this->deferredResultsComplex))) {
              try {
                  while ($deferredResolver = array_shift($this->deferredResultsComplex)) {
                      $deferredResolver->resolve();
                  }

                  // Deferred scalar and enum fields should be resolved last to
                  // pick up as many as possible for a single batch.
                  while ($deferredResolver = array_shift($this->deferredResultsLeaf)) {
                      $deferredResolver->resolve();
                  }
              } catch (\Exception $e) {
                  $this->executionContext->addError($e);
              } finally {
                  $this->data = static::unpackDeferredResults($this->data);
              }
            }

        } catch (\Exception $e) {
            $this->executionContext->addError($e);
        }

        return $this;
    }

    /**
     * Unpack results stored inside deferred resolvers.
     *
     * @param mixed $result
     *   The result ree.
     *
     * @return mixed
     *   The unpacked result.
     */
    public static function unpackDeferredResults($result)
    {
        while ($result instanceof DeferredResult) {
            $result = $result->result;
        }

        if (is_array($result)) {
            foreach ($result as $key => $value) {
                $result[$key] = static::unpackDeferredResults($value);
            }
        }

        return $result;
    }

    protected function resolveQuery(AstQuery $query)
    {
        $schema = $this->executionContext->getSchema();
        $type   = $query instanceof AstMutation ? $schema->getMutationType() : $schema->getQueryType();
        $field  = new Field([
            'name' => $query instanceof AstMutation ? 'mutation' : 'query',
            'type' => $type
        ]);

        if (self::TYPE_NAME_QUERY == $query->getName()) {
            return [$this->getAlias($query) => $type->getName()];
        }

        $this->resolveValidator->assetTypeHasField($type, $query);
        $value = $this->resolveField($field, $query);

        return [$this->getAlias($query) => $value];
    }

    protected function resolveField(FieldInterface $field, AstFieldInterface $ast, $parentValue = null, $fromObject = false)
    {
        try {
            /** @var AbstractObjectType $type */
            $type        = $field->getType();
            $nonNullType = $type->getNullableType();

            if (self::TYPE_NAME_QUERY == $ast->getName()) {
                return $nonNullType->getName();
            }

            $this->resolveValidator->assetTypeHasField($nonNullType, $ast);

            $targetField = $this->executionContext->getField($nonNullType, $ast->getName());


            $this->prepareAstArguments($targetField, $ast, $this->executionContext->getRequest());
            $this->resolveValidator->assertValidArguments($targetField, $ast, $this->executionContext->getRequest());

            switch ($kind = $targetField->getType()->getNullableType()->getKind()) {
                case TypeMap::KIND_ENUM:
                case TypeMap::KIND_SCALAR:
                    if ($ast instanceof AstQuery && $ast->hasFields()) {
                        throw new ResolveException(sprintf('You can\'t specify fields for scalar type "%s"', $targetField->getType()->getNullableType()->getName()), $ast->getLocation());
                    }

                    return $this->resolveScalar($targetField, $ast, $parentValue);

                case TypeMap::KIND_OBJECT:

                    /** @var $type AbstractObjectType */
                    if (!$ast instanceof AstQuery) {
                        throw new ResolveException(sprintf('You have to specify fields for "%s"', $ast->getName()), $ast->getLocation());
                    }

                    return $this->resolveObject($targetField, $ast, $parentValue);

                case TypeMap::KIND_LIST:
                    return $this->resolveList($targetField, $ast, $parentValue);

                case TypeMap::KIND_UNION:
                case TypeMap::KIND_INTERFACE:

                    if (!$ast instanceof AstQuery) {
                        throw new ResolveException(sprintf('You have to specify fields for "%s"', $ast->getName()), $ast->getLocation());
                    }

                    return $this->resolveComposite($targetField, $ast, $parentValue);

                default:
                    throw new ResolveException(sprintf('Resolving type with kind "%s" not supported', $kind));
            }
        } catch (\Exception $e) {
            $this->executionContext->addError($e);

            if ($fromObject) {
                throw $e;
            }

            return null;
        }
    }

    private function prepareAstArguments(FieldInterface $field, AstFieldInterface $query, Request $request)
    {
        foreach ($query->getArguments() as $astArgument) {
            if ($field->hasArgument($astArgument->getName())) {
                $argumentType = $field->getArgument($astArgument->getName())->getType()->getNullableType();

                $astArgument->setValue($this->prepareArgumentValue($astArgument->getValue(), $argumentType, $request));
            }
        }
    }

    private function prepareArgumentValue($argumentValue, AbstractType $argumentType, Request $request)
    {
        switch ($argumentType->getKind()) {
            case TypeMap::KIND_LIST:
                /** @var $argumentType AbstractListType */
                $result = [];
                if ($argumentValue instanceof AstInputList || is_array($argumentValue)) {
                    $list = is_array($argumentValue) ? $argumentValue : $argumentValue->getValue();
                    foreach ($list as $item) {
                        $result[] = $this->prepareArgumentValue($item, $argumentType->getItemType()->getNullableType(), $request);
                    }
                } else {
                    if ($argumentValue instanceof VariableReference) {
                        return $this->getVariableReferenceArgumentValue($argumentValue, $argumentType, $request);
                    }
                }

                return $result;

            case TypeMap::KIND_INPUT_OBJECT:
                /** @var $argumentType AbstractInputObjectType */
                $result = [];
                if ($argumentValue instanceof AstInputObject) {
                    foreach ($argumentType->getFields() as $field) {
                        /** @var $field Field */
                        if ($field->getConfig()->has('defaultValue')) {
                            $result[$field->getName()] = $field->getType()->getNullableType()->parseInputValue($field->getConfig()->get('defaultValue'));
                        }
                    }
                    foreach ($argumentValue->getValue() as $key => $item) {
                        if ($argumentType->hasField($key)) {
                            $result[$key] = $this->prepareArgumentValue($item, $argumentType->getField($key)->getType()->getNullableType(), $request);
                        } else {
                            $result[$key] = $item;
                        }
                    }
                } else {
                    if ($argumentValue instanceof VariableReference) {
                        return $this->getVariableReferenceArgumentValue($argumentValue, $argumentType, $request);
                    } else {
                        if (is_array($argumentValue)) {
                            return $argumentValue;
                        }
                    }
                }

                return $result;

            case TypeMap::KIND_SCALAR:
            case TypeMap::KIND_ENUM:
                /** @var $argumentValue AstLiteral|VariableReference */
                if ($argumentValue instanceof VariableReference) {
                    return $this->getVariableReferenceArgumentValue($argumentValue, $argumentType, $request);
                } else {
                    if ($argumentValue instanceof AstLiteral) {
                        return $argumentValue->getValue();
                    } else {
                        return $argumentValue;
                    }
                }
        }

        throw new ResolveException('Argument type not supported');
    }

    private function getVariableReferenceArgumentValue(VariableReference $variableReference, AbstractType $argumentType, Request $request)
    {
        $variable = $variableReference->getVariable();
        if ($argumentType->getKind() === TypeMap::KIND_LIST) {
            if (
                (!$variable->isArray() && !is_array($variable->getValue())) ||
                ($variable->getTypeName() !== $argumentType->getNamedType()->getNullableType()->getName()) ||
                ($argumentType->getNamedType()->getKind() === TypeMap::KIND_NON_NULL && $variable->isArrayElementNullable())
            ) {
                throw new ResolveException(sprintf('Invalid variable "%s" type, allowed type is "%s"', $variable->getName(), $argumentType->getNamedType()->getNullableType()->getName()), $variable->getLocation());
            }
        } else {
            if ($variable->getTypeName() !== $argumentType->getName()) {
                throw new ResolveException(sprintf('Invalid variable "%s" type, allowed type is "%s"', $variable->getName(), $argumentType->getName()), $variable->getLocation());
            }
        }

        $requestValue = $request->getVariable($variable->getName());
        if ((null === $requestValue && $variable->isNullable()) && !$request->hasVariable($variable->getName())) {
            throw new ResolveException(sprintf('Variable "%s" does not exist in request', $variable->getName()), $variable->getLocation());
        }

        return $requestValue;
    }


    /**
     * @param FieldInterface     $field
     * @param AbstractObjectType $type
     * @param AstFieldInterface  $ast
     * @param                    $resolvedValue
     * @return array
     */
    private function collectResult(FieldInterface $field, AbstractObjectType $type, $ast, $resolvedValue)
    {
        $result = [];

        foreach ($ast->getFields() as $astField) {
            switch (true) {
                case $astField instanceof TypedFragmentReference:
                    $astName  = $astField->getTypeName();
                    $typeName = $type->getName();

                    if ($typeName !== $astName) {

                        foreach ($type->getInterfaces() as $interface) {
                            if ($interface->getName() === $astName) {
                                $result = array_replace_recursive($result, $this->collectResult($field, $type, $astField, $resolvedValue));
function acceptsInteger($int) { }

$x = '123'; // string "123"

// Instead of
acceptsInteger($x);

// we recommend to use
acceptsInteger((integer) $x);

                                break;
                            }
                        }

                        continue 2;
                    }

                    $result = array_replace_recursive($result, $this->collectResult($field, $type, $astField, $resolvedValue));
function acceptsInteger($int) { }

$x = '123'; // string "123"

// Instead of
acceptsInteger($x);

// we recommend to use
acceptsInteger((integer) $x);

                    break;

                case $astField instanceof FragmentReference:
                    $astFragment      = $this->executionContext->getRequest()->getFragment($astField->getName());
                    $astFragmentModel = $astFragment->getModel();
                    $typeName         = $type->getName();

                    if ($typeName !== $astFragmentModel) {

                        foreach ($type->getInterfaces() as $interface) {
                            if ($interface->getName() === $astFragmentModel) {
                                $result = array_replace_recursive($result, $this->collectResult($field, $type, $astFragment, $resolvedValue));
function acceptsInteger($int) { }

$x = '123'; // string "123"

// Instead of
acceptsInteger($x);

// we recommend to use
acceptsInteger((integer) $x);

                                break;
                            }
                        }

                        continue 2;
                    }

                    $result = array_replace_recursive($result, $this->collectResult($field, $type, $astFragment, $resolvedValue));
function acceptsInteger($int) { }

$x = '123'; // string "123"

// Instead of
acceptsInteger($x);

// we recommend to use
acceptsInteger((integer) $x);

                    break;

                default:
                    $result = array_replace_recursive($result, [$this->getAlias($astField) => $this->resolveField($field, $astField, $resolvedValue, true)]);
            }
        }

        return $result;
    }

    /**
     * Apply post-process callbacks to all deferred resolvers.
     */
    protected function deferredResolve($resolvedValue, FieldInterface $field, callable $callback) {
        if ($resolvedValue instanceof DeferredResolverInterface) {
            $deferredResult = new DeferredResult($resolvedValue, function ($resolvedValue) use ($field, $callback) {
                // Allow nested deferred resolvers.
                return $this->deferredResolve($resolvedValue, $field, $callback);
            });

            // Whenever we stumble upon a deferred resolver, add it to the queue
            // to be resolved later.
            $type = $field->getType()->getNamedType();
            if ($type instanceof AbstractScalarType || $type instanceof AbstractEnumType) {
                array_push($this->deferredResultsLeaf, $deferredResult);
            } else {
                array_push($this->deferredResultsComplex, $deferredResult);
            }

            return $deferredResult;
        }
        // For simple values, invoke the callback immediately.
        return $callback($resolvedValue);
    }

    protected function resolveScalar(FieldInterface $field, AstFieldInterface $ast, $parentValue)
    {
        $resolvedValue = $this->doResolve($field, $ast, $parentValue);
        return $this->deferredResolve($resolvedValue, $field, function($resolvedValue) use ($field, $ast, $parentValue) {
            $this->resolveValidator->assertValidResolvedValueForField($field, $resolvedValue);

            /** @var AbstractScalarType $type */
            $type = $field->getType()->getNullableType();

            return $type->serialize($resolvedValue);
        });
    }

    protected function resolveList(FieldInterface $field, AstFieldInterface $ast, $parentValue)
    {
        /** @var AstQuery $ast */
        $resolvedValue = $this->doResolve($field, $ast, $parentValue);

        return $this->deferredResolve($resolvedValue, $field, function ($resolvedValue) use ($field, $ast, $parentValue) {
            $this->resolveValidator->assertValidResolvedValueForField($field, $resolvedValue);

            if (null === $resolvedValue) {
                return null;
            }

            /** @var AbstractListType $type */
            $type     = $field->getType()->getNullableType();
            $itemType = $type->getNamedType();

            $fakeAst = clone $ast;
            if ($fakeAst instanceof AstQuery) {
                $fakeAst->setArguments([]);
            }

            $fakeField = new Field([
              'name' => $field->getName(),
              'type' => $itemType,
              'args' => $field->getArguments(),
            ]);

            $result = [];
            foreach ($resolvedValue as $resolvedValueItem) {
                try {
                    $fakeField->getConfig()->set('resolve', function () use ($resolvedValueItem) {
                        return $resolvedValueItem;
                    });

                    switch ($itemType->getNullableType()->getKind()) {
                        case TypeMap::KIND_ENUM:
                        case TypeMap::KIND_SCALAR:
                            $value = $this->resolveScalar($fakeField, $fakeAst, $resolvedValueItem);

                            break;


                        case TypeMap::KIND_OBJECT:
                            $value = $this->resolveObject($fakeField, $fakeAst, $resolvedValueItem);

                            break;

                        case TypeMap::KIND_UNION:
                        case TypeMap::KIND_INTERFACE:
                            $value = $this->resolveComposite($fakeField, $fakeAst, $resolvedValueItem);

                            break;

                        default:
                            $value = null;
                    }
                } catch (\Exception $e) {
                    $this->executionContext->addError($e);

                    $value = null;
                }

                $result[] = $value;
            }

            return $result;
        });
    }

    protected function resolveObject(FieldInterface $field, AstFieldInterface $ast, $parentValue, $fromUnion = false)
    {
        $resolvedValue = $parentValue;
        if (!$fromUnion) {
            $resolvedValue = $this->doResolve($field, $ast, $parentValue);
        }

        return $this->deferredResolve($resolvedValue, $field, function ($resolvedValue) use ($field, $ast, $parentValue) {
            $this->resolveValidator->assertValidResolvedValueForField($field, $resolvedValue);

            if (null === $resolvedValue) {
                return null;
            }
            /** @var AbstractObjectType $type */
            $type = $field->getType()->getNullableType();

            try {
                return $this->collectResult($field, $type, $ast, $resolvedValue);
            } catch (\Exception $e) {
                return null;
            }
        });
    }

    protected function resolveComposite(FieldInterface $field, AstFieldInterface $ast, $parentValue)
    {
        /** @var AstQuery $ast */
        $resolvedValue = $this->doResolve($field, $ast, $parentValue);
        return $this->deferredResolve($resolvedValue, $field, function ($resolvedValue) use ($field, $ast, $parentValue) {
            $this->resolveValidator->assertValidResolvedValueForField($field, $resolvedValue);

            if (null === $resolvedValue) {
                return null;
            }

            /** @var AbstractUnionType $type */
            $type         = $field->getType()->getNullableType();
            $resolveInfo = new ResolveInfo(
                $field,
                $ast instanceof AstQuery ? $ast->getFields() : [],
                $this->executionContext
            );
            $resolvedType = $type->resolveType($resolvedValue, $resolveInfo);


            if (!$resolvedType) {
                throw new ResolveException('Resolving function must return type');
            }

            if ($type instanceof AbstractInterfaceType) {
                $this->resolveValidator->assertTypeImplementsInterface($resolvedType, $type);
            } else {
                $this->resolveValidator->assertTypeInUnionTypes($resolvedType, $type);
            }

            $fakeField = new Field([
              'name' => $field->getName(),
              'type' => $resolvedType,
              'args' => $field->getArguments(),
            ]);

            return $this->resolveObject($fakeField, $ast, $resolvedValue, true);
        });
    }

    protected function parseAndCreateRequest($payload, $variables = [])
    {
        if (empty($payload)) {
            throw new \InvalidArgumentException('Must provide an operation.');
        }

        $parser  = new Parser();
        $request = new Request($parser->parse($payload), $variables);

        (new RequestValidator())->validate($request);

        $this->executionContext->setRequest($request);
    }

    protected function doResolve(FieldInterface $field, AstFieldInterface $ast, $parentValue = null)
    {
        /** @var AstQuery|AstField $ast */
        $arguments = $this->parseArgumentsValues($field, $ast);
        $astFields = $ast instanceof AstQuery ? $ast->getFields() : [];

        return $field->resolve($parentValue, $arguments, $this->createResolveInfo($field, $astFields));
    }

    protected function parseArgumentsValues(FieldInterface $field, AstFieldInterface $ast)
    {
        $values   = [];
        $defaults = [];

        foreach ($field->getArguments() as $argument) {
            /** @var $argument InputField */
            if ($argument->getConfig()->has('defaultValue')) {
                $defaults[$argument->getName()] = $argument->getConfig()->getDefaultValue();
            }
        }

        foreach ($ast->getArguments() as $astArgument) {
            $argument     = $field->getArgument($astArgument->getName());
            $argumentType = $argument->getType()->getNullableType();

            $values[$argument->getName()] = $argumentType->parseValue($astArgument->getValue());

            if (isset($defaults[$argument->getName()])) {
                unset($defaults[$argument->getName()]);
            }
        }

        return array_merge($values, $defaults);
    }

    private function getAlias(AstFieldInterface $ast)
    {
        return $ast->getAlias() ?: $ast->getName();
    }

    protected function createResolveInfo(FieldInterface $field, array $astFields)
    {
        return new ResolveInfo($field, $astFields, $this->executionContext);
    }


    /**
     * You can access ExecutionContext to check errors and inject dependencies
     *
     * @return ExecutionContext
     */
    public function getExecutionContext()
    {
        return $this->executionContext;
    }

    public function getResponseData()
    {
        $result = [];

        if (!empty($this->data)) {
            $result['data'] = $this->data;
        }

        if ($this->executionContext->hasErrors()) {
            $result['errors'] = $this->executionContext->getErrorsArray();
        }

        return $result;
    }

    /**
     * @return int
     */
    public function getMaxComplexity()
    {
        return $this->maxComplexity;
    }

    /**
     * @param int $maxComplexity
     */
    public function setMaxComplexity($maxComplexity)
    {
        $this->maxComplexity = $maxComplexity;
    }

}


Youshido / GraphQL

Issues (234)

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src/Execution/Processor.php (11 issues)

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