ScramblePrivateMethod::enterNode() - Code Metrics - naneau/php-obfuscator - Measure and Improve Code Quality continuously with Scrutinizer

ScramblePrivateMethod::enterNode() B
last analyzed 2016-12-19 15:58 UTC

↳ Parent: ScramblePrivateMethod

Complexity

Conditions	5
Paths	4

Size

Total Lines	18
Code Lines	7

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
c	0
b	0
f	0
dl	0
loc	18
rs	8.8571
cc	5
eloc	7
nc	4
nop	1

<?php
/**
 * ScramblePrivateMethod.php
 *
 * @category        Naneau
 * @package         Obfuscator
 * @subpackage      NodeVisitor
 */

namespace Naneau\Obfuscator\Node\Visitor;

use Naneau\Obfuscator\Node\Visitor\TrackingRenamerTrait;
use Naneau\Obfuscator\Node\Visitor\SkipTrait;

use Naneau\Obfuscator\Node\Visitor\Scrambler as ScramblerVisitor;
use Naneau\Obfuscator\StringScrambler;

use PhpParser\Node;

use PhpParser\Node\Stmt\Class_ as ClassNode;
use PhpParser\Node\Stmt\ClassMethod;
use PhpParser\Node\Expr\MethodCall;
use PhpParser\Node\Expr\StaticCall;
use PhpParser\Node\Expr\Variable;

/**
 * ScramblePrivateMethod
 *
 * Renames private methods
 *
 * WARNING
 *
 * This method is not foolproof. This visitor scans for all private method
 * declarations and renames them. It then finds *all* method calls in the
 * class, and renames them if they match the name of a renamed method. If your
 * class calls a method of *another* class that happens to match one of the
 * renamed private methods, this visitor will rename it.
 *
 * @category        Naneau
 * @package         Obfuscator
 * @subpackage      NodeVisitor
 */
class ScramblePrivateMethod extends ScramblerVisitor
{
    use TrackingRenamerTrait;
    use SkipTrait;

    /**
     * Before node traversal
     *
     * @param  Node[] $nodes
     * @return array
     **/
    public function beforeTraverse(array $nodes)
    {
        $this
            ->resetRenamed()
            ->skip($this->variableMethodCallsUsed($nodes));

        $this->scanMethodDefinitions($nodes);

        return $nodes;
    }

    /**
     * Check all variable nodes
     *
     * @param  Node $node
     * @return void
     **/
    public function enterNode(Node $node)
    {
        if ($this->shouldSkip()) {
            return;
        }

        // Scramble calls
        if ($node instanceof MethodCall || $node instanceof StaticCall) {

            // Node wasn't renamed
            if (!$this->isRenamed($node->name)) {
                return;
            }

            // Scramble usage
            return $this->scramble($node);
        }
    }

    /**
     * Recursively scan for method calls and see if variables are used
     *
     * @param  Node[] $nodes
     * @return void
     **/
    private function variableMethodCallsUsed(array $nodes)
    {
        foreach ($nodes as $node) {
            if ($node instanceof MethodCall && $node->name instanceof Variable) {
                // A method call uses a Variable as its name
                return true;
            }

            // Recurse over child nodes
            if (isset($node->stmts) && is_array($node->stmts)) {
interface SomeInterface { }
class SomeClass implements SomeInterface {
    public $a;
}

function someFunction(SomeInterface $object) {
    if ($object instanceof SomeClass) {
        $a = $object->a;
    }
}
                $used = $this->variableMethodCallsUsed($node->stmts);
interface SomeInterface { }
class SomeClass implements SomeInterface {
    public $a;
}

function someFunction(SomeInterface $object) {
    if ($object instanceof SomeClass) {
        $a = $object->a;
    }
}

                if ($used) {
                    return true;
                }
            }
        }

        return false;
    }

    /**
     * Recursively scan for private method definitions and rename them
     *
     * @param  Node[] $nodes
     * @return void
     **/
    private function scanMethodDefinitions(array $nodes)

    {
        foreach ($nodes as $node) {
            // Scramble the private method definitions
            if ($node instanceof ClassMethod && ($node->type & ClassNode::MODIFIER_PRIVATE)) {

                // Record original name and scramble it
                $originalName = $node->name;
                $this->scramble($node);

                // Record renaming
                $this->renamed($originalName, $node->name);
            }

            // Recurse over child nodes
            if (isset($node->stmts) && is_array($node->stmts)) {
interface SomeInterface { }
class SomeClass implements SomeInterface {
    public $a;
}

function someFunction(SomeInterface $object) {
    if ($object instanceof SomeClass) {
        $a = $object->a;
    }
}
                $this->scanMethodDefinitions($node->stmts);
interface SomeInterface { }
class SomeClass implements SomeInterface {
    public $a;
}

function someFunction(SomeInterface $object) {
    if ($object instanceof SomeClass) {
        $a = $object->a;
    }
}
            }
        }
    }
}


1		<?php
2		/**
3		* ScramblePrivateMethod.php
4		*
5		* @category Naneau
6		* @package Obfuscator
7		* @subpackage NodeVisitor
8		*/
9
10		namespace Naneau\Obfuscator\Node\Visitor;
11
12		use Naneau\Obfuscator\Node\Visitor\TrackingRenamerTrait;
13		use Naneau\Obfuscator\Node\Visitor\SkipTrait;
14
15		use Naneau\Obfuscator\Node\Visitor\Scrambler as ScramblerVisitor;
16		use Naneau\Obfuscator\StringScrambler;
17
18		use PhpParser\Node;
19
20		use PhpParser\Node\Stmt\Class_ as ClassNode;
21		use PhpParser\Node\Stmt\ClassMethod;
22		use PhpParser\Node\Expr\MethodCall;
23		use PhpParser\Node\Expr\StaticCall;
24		use PhpParser\Node\Expr\Variable;
25
26		/**
27		* ScramblePrivateMethod
28		*
29		* Renames private methods
30		*
31		* WARNING
32		*
33		* This method is not foolproof. This visitor scans for all private method
34		* declarations and renames them. It then finds all method calls in the
35		* class, and renames them if they match the name of a renamed method. If your
36		* class calls a method of another class that happens to match one of the
37		* renamed private methods, this visitor will rename it.
38		*
39		* @category Naneau
40		* @package Obfuscator
41		* @subpackage NodeVisitor
42		*/
43		class ScramblePrivateMethod extends ScramblerVisitor
44		{
45		use TrackingRenamerTrait;
46		use SkipTrait;
47
48		/**
49		* Before node traversal
50		*
51		* @param Node[] $nodes
52		* @return array
53		**/
54		public function beforeTraverse(array $nodes)
55		{
56		$this
57		->resetRenamed()
58		->skip($this->variableMethodCallsUsed($nodes));
59
60		$this->scanMethodDefinitions($nodes);
61
62		return $nodes;
63		}
64
65		/**
66		* Check all variable nodes
67		*
68		* @param Node $node
69		* @return void
70		**/
71		public function enterNode(Node $node)
72		{
73		if ($this->shouldSkip()) {
74		return;
75		}
76
77		// Scramble calls
78		if ($node instanceof MethodCall \|\| $node instanceof StaticCall) {
79
80		// Node wasn't renamed
81		if (!$this->isRenamed($node->name)) {
82		return;
83		}
84
85		// Scramble usage
86		return $this->scramble($node);
87		}
88		}
89
90		/**
91		* Recursively scan for method calls and see if variables are used
92		*
93		* @param Node[] $nodes
94		* @return void
95		**/
96		private function variableMethodCallsUsed(array $nodes)
97		{
98		foreach ($nodes as $node) {
99		if ($node instanceof MethodCall && $node->name instanceof Variable) {
100		// A method call uses a Variable as its name
101		return true;
102		}
103
104		// Recurse over child nodes
105		if (isset($node->stmts) && is_array($node->stmts)) {
		0 ignored issues – show Bug introduced 2015-12-10 00:13 UTC by Report Bug Copy Issue Report Accessing `stmts` on the interface `PhpParser\Node` suggest that you code against a concrete implementation. How about adding an `instanceof` check? If you access a property on an interface, you most likely code against a concrete implementation of the interface. Available Fixes Adding an additional type check: interface SomeInterface { } class SomeClass implements SomeInterface { public $a; } function someFunction(SomeInterface $object) { if ($object instanceof SomeClass) { $a = $object->a; } } Changing the type hint: interface SomeInterface { } class SomeClass implements SomeInterface { public $a; } function someFunction(SomeClass $object) { $a = $object->a; } Loading history...
106		$used = $this->variableMethodCallsUsed($node->stmts);
		0 ignored issues – show Bug introduced 2015-12-10 00:13 UTC by Report Bug Copy Issue Report Accessing `stmts` on the interface `PhpParser\Node` suggest that you code against a concrete implementation. How about adding an `instanceof` check? If you access a property on an interface, you most likely code against a concrete implementation of the interface. Available Fixes Adding an additional type check: interface SomeInterface { } class SomeClass implements SomeInterface { public $a; } function someFunction(SomeInterface $object) { if ($object instanceof SomeClass) { $a = $object->a; } } Changing the type hint: interface SomeInterface { } class SomeClass implements SomeInterface { public $a; } function someFunction(SomeClass $object) { $a = $object->a; } Loading history...
107
108		if ($used) {
109		return true;
110		}
111		}
112		}
113
114		return false;
115		}
116
117		/**
118		* Recursively scan for private method definitions and rename them
119		*
120		* @param Node[] $nodes
121		* @return void
122		**/
123	View Code Duplication	private function scanMethodDefinitions(array $nodes)
		0 ignored issues – show Duplication introduced 2015-12-10 00:13 UTC by Report Bug Copy Issue Report This method seems to be duplicated in your project. Duplicated code is one of the most pungent code smells. If you need to duplicate the same code in three or more different places, we strongly encourage you to look into extracting the code into a single class or operation. You can also find more detailed suggestions in the “Code” section of your repository. Loading history...
124		{
125		foreach ($nodes as $node) {
126		// Scramble the private method definitions
127		if ($node instanceof ClassMethod && ($node->type & ClassNode::MODIFIER_PRIVATE)) {
128
129		// Record original name and scramble it
130		$originalName = $node->name;
131		$this->scramble($node);
132
133		// Record renaming
134		$this->renamed($originalName, $node->name);
135		}
136
137		// Recurse over child nodes
138		if (isset($node->stmts) && is_array($node->stmts)) {
		0 ignored issues – show Bug introduced 2015-12-10 00:13 UTC by Report Bug Copy Issue Report Accessing `stmts` on the interface `PhpParser\Node` suggest that you code against a concrete implementation. How about adding an `instanceof` check? If you access a property on an interface, you most likely code against a concrete implementation of the interface. Available Fixes Adding an additional type check: interface SomeInterface { } class SomeClass implements SomeInterface { public $a; } function someFunction(SomeInterface $object) { if ($object instanceof SomeClass) { $a = $object->a; } } Changing the type hint: interface SomeInterface { } class SomeClass implements SomeInterface { public $a; } function someFunction(SomeClass $object) { $a = $object->a; } Loading history...
139		$this->scanMethodDefinitions($node->stmts);
		0 ignored issues – show Bug introduced 2015-12-10 00:13 UTC by Report Bug Copy Issue Report Accessing `stmts` on the interface `PhpParser\Node` suggest that you code against a concrete implementation. How about adding an `instanceof` check? If you access a property on an interface, you most likely code against a concrete implementation of the interface. Available Fixes Adding an additional type check: interface SomeInterface { } class SomeClass implements SomeInterface { public $a; } function someFunction(SomeInterface $object) { if ($object instanceof SomeClass) { $a = $object->a; } } Changing the type hint: interface SomeInterface { } class SomeClass implements SomeInterface { public $a; } function someFunction(SomeClass $object) { $a = $object->a; } Loading history...
140		}
141		}
142		}
143		}
144

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ScramblePrivateMethod::enterNode() B last analyzed 2016-12-19 15:58 UTC

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ScramblePrivateMethod::enterNode() B
last analyzed 2016-12-19 15:58 UTC