Complex classes like WsSecurityFilterRequest often do a lot of different things. To break such a class down, we need to identify a cohesive component within that class. A common approach to find such a component is to look for fields/methods that share the same prefixes, or suffixes. You can also have a look at the cohesion graph to spot any un-connected, or weakly-connected components.
Once you have determined the fields that belong together, you can apply the Extract Class refactoring. If the component makes sense as a sub-class, Extract Subclass is also a candidate, and is often faster.
While breaking up the class, it is a good idea to analyze how other classes use WsSecurityFilterRequest, and based on these observations, apply Extract Interface, too.
1 | <?php |
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10 | class WsSecurityFilterRequest extends AbstractWsSecurityFilter |
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11 | { |
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12 | /** |
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13 | * Web Services Security: SOAP Message Security 1.0 (WS-Security 2004) |
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14 | */ |
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15 | const NAME_WSS_SMS = 'http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-soap-message-security-1.0'; |
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16 | |||
17 | /** |
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18 | * Web Services Security UsernameToken Profile 1.0 |
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19 | */ |
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20 | const NAME_WSS_UTP = 'http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-username-token-profile-1.0'; |
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21 | |||
22 | /** |
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23 | * Web Services Security: SOAP Message Security 1.1 (WS-Security 2004) |
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24 | */ |
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25 | const NAME_WSS_SMS_1_1 = 'http://docs.oasis-open.org/wss/oasis-wss-soap-message-security-1.1'; |
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26 | |||
27 | /** |
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28 | * Web Services Security X.509 Certificate Token Profile |
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29 | */ |
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30 | const NAME_WSS_X509 = 'http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-x509-token-profile-1.0'; |
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31 | |||
32 | /** |
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33 | * The date format to be used with {@link \DateTime} |
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34 | */ |
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35 | const DATETIME_FORMAT = 'Y-m-d\TH:i:s.000\Z'; |
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36 | |||
37 | /** |
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38 | * (X509 3.2.1) Reference to a Subject Key Identifier |
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39 | */ |
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40 | const TOKEN_REFERENCE_SUBJECT_KEY_IDENTIFIER = 0; |
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41 | |||
42 | /** |
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43 | * (X509 3.2.1) Reference to a Security Token |
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44 | */ |
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45 | const TOKEN_REFERENCE_SECURITY_TOKEN = 1; |
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46 | |||
47 | /** |
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48 | * (SMS_1.1 7.3) Key Identifiers |
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49 | */ |
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50 | const TOKEN_REFERENCE_THUMBPRINT_SHA1 = 2; |
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51 | |||
52 | /** |
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53 | * (SMS 10) Add security timestamp. |
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54 | * |
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55 | * @var boolean |
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56 | */ |
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57 | private $addTimestamp = true; |
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58 | |||
59 | /** |
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60 | * Encrypt the signature? |
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61 | * |
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62 | * @var boolean |
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63 | */ |
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64 | private $encryptSignature = false; |
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65 | |||
66 | /** |
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67 | * (SMS 10) Security timestamp expires time in seconds. |
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68 | * |
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69 | * @var int |
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70 | */ |
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71 | private $expires = 300; |
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72 | |||
73 | /** |
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74 | * Sign all headers. |
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75 | * |
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76 | * @var boolean |
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77 | */ |
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78 | private $signAllHeaders = false; |
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79 | |||
80 | /** |
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81 | * @var \DateTime |
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82 | */ |
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83 | private $initialTimestamp; |
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84 | |||
85 | /** |
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86 | * (X509 3.2) Token reference type for encryption. |
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87 | * |
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88 | * @var int |
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89 | */ |
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90 | private $tokenReferenceEncryption = null; |
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91 | |||
92 | /** |
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93 | * (X509 3.2) Token reference type for signature. |
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94 | * |
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95 | * @var int |
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96 | */ |
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97 | private $tokenReferenceSignature = null; |
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98 | |||
99 | |||
100 | public function setTimestampOptions($addTimestamp = true, $expires = 300) |
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105 | |||
106 | /** |
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107 | * @param \DateTime $initialTimestamp |
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108 | */ |
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109 | public function __construct(\DateTime $initialTimestamp = null) |
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113 | |||
114 | /** |
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115 | * Set security options. |
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116 | * |
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117 | * @param int $tokenReference self::TOKEN_REFERENCE_SUBJECT_KEY_IDENTIFIER | self::TOKEN_REFERENCE_SECURITY_TOKEN | self::TOKEN_REFERENCE_THUMBPRINT_SHA1 |
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118 | * @param boolean $encryptSignature Encrypt signature |
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119 | * |
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120 | * @return void |
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121 | */ |
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122 | public function setSecurityOptionsEncryption($tokenReference, $encryptSignature = false) |
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127 | |||
128 | /** |
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129 | * Set security options. |
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130 | * |
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131 | * @param int $tokenReference self::TOKEN_REFERENCE_SUBJECT_KEY_IDENTIFIER | self::TOKEN_REFERENCE_SECURITY_TOKEN | self::TOKEN_REFERENCE_THUMBPRINT_SHA1 |
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132 | * @param boolean $signAllHeaders Sign all headers? |
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133 | * |
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134 | * @return void |
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135 | */ |
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136 | public function setSecurityOptionsSignature($tokenReference, $signAllHeaders = false) |
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141 | |||
142 | /** |
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143 | * Adds the configured KeyInfo to the parentNode. |
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144 | * |
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145 | * @param \DOMDocument $dom |
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146 | * @param int $tokenReference Token reference type |
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147 | * @param string $guid Unique ID |
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148 | * @param XmlSecurityKey $xmlSecurityKey XML security key |
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149 | * |
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150 | * @return \DOMElement |
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151 | */ |
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152 | private function createKeyInfo(\DOMDocument $dom, $tokenReference, $guid, XmlSecurityKey $xmlSecurityKey = null) |
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187 | |||
188 | /** |
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189 | * Create a list of \DOMNodes that should be encrypted. |
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190 | * |
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191 | * @param \DOMDocument $dom DOMDocument to query |
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192 | * |
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193 | * @return \DOMNodeList |
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194 | */ |
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195 | private function createNodeListForEncryption(\DOMDocument $dom) |
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208 | |||
209 | /** |
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210 | * Create a list of \DOMNodes that should be signed. |
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211 | * |
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212 | * @param \DOMDocument $dom DOMDocument to query |
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213 | * @param \DOMElement $security Security element |
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214 | * |
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215 | * @return array(\DOMNode) |
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216 | */ |
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217 | private function createNodeListForSigning(\DOMDocument $dom, \DOMElement $security) |
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240 | |||
241 | |||
242 | /** |
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243 | * Modify the given request XML. |
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244 | * |
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245 | * @param \DOMElement $currentNode, |
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246 | * @param Security $securityData |
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247 | * |
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248 | * @return \DOMElement |
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249 | */ |
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250 | public function filterDom(\DOMElement $currentNode, Security $securityData) |
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294 | |||
295 | /** |
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296 | * Generate a pseudo-random version 4 UUID. |
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297 | * |
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298 | * @see http://de.php.net/manual/en/function.uniqid.php#94959 |
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299 | * |
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300 | * @return string |
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301 | */ |
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302 | private static function generateUUID() |
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321 | |||
322 | /** |
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323 | * @param \DOMElement $security |
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324 | * @param \DateTime $dt |
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325 | */ |
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326 | private function handleTimestamp(\DOMElement $security, \DateTime $dt) |
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341 | |||
342 | /** |
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343 | * @param \DOMElement $security |
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344 | * @param $dt |
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345 | * @param Security $securityData |
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346 | */ |
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347 | private function handleUsername(\DOMElement $security, $dt, Security $securityData) |
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383 | |||
384 | /** |
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385 | * @param \DOMElement $security |
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386 | * @return \DOMElement |
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387 | */ |
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388 | private function handleSignature(\DOMElement $security) |
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432 | |||
433 | /** |
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434 | * @param \DOMElement $security |
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435 | * @param \DOMElement $signature |
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436 | */ |
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437 | private function handleEncryption(\DOMElement $security, \DOMElement $signature) |
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459 | } |
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460 |
Let’s take a look at an example:
In the above example, the authenticate() method works fine as long as you just pass instances of MyUser. However, if you now also want to pass a different sub-classes of User which does not have a getDisplayName() method, the code will break.
Available Fixes
Change the type-hint for the parameter:
Add an additional type-check:
Add the method to the parent class: