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authorrojaro <>2010-07-12 10:25:52 +0000
committerrojaro <>2010-07-12 10:25:52 +0000
commitfad7be3cfd09263b6c4e36a392aedd701c8e6bfc (patch)
tree24c4f422002fdbf3b917d06d66052adcd347f72d /framework
parent7e71cfc9c053b36bdfd61e9781b5509412d8f04f (diff)
removed the zero byte right trim from the decryption routine and also made some cosmetic changes
Diffstat (limited to 'framework')
-rw-r--r--framework/Security/TSecurityManager.php547
1 files changed, 267 insertions, 280 deletions
diff --git a/framework/Security/TSecurityManager.php b/framework/Security/TSecurityManager.php
index d43c9fec..18ced3c7 100644
--- a/framework/Security/TSecurityManager.php
+++ b/framework/Security/TSecurityManager.php
@@ -1,281 +1,268 @@
-<?php
-/**
- * TSecurityManager class file
- *
- * @author Qiang Xue <qiang.xue@gmail.com>
- * @link http://www.pradosoft.com/
+<?php
+
+/**
+ * TSecurityManager class file
+ *
+ * @author Qiang Xue <qiang.xue@gmail.com>
+ * @link http://www.pradosoft.com/
* @copyright Copyright &copy; 2005-2008 PradoSoft
- * @license http://www.pradosoft.com/license/
- * @version $Id$
- * @package System.Security
- */
-
-/**
- * TSecurityManager class
- *
- * TSecurityManager provides private keys, hashing and encryption
- * functionalities that may be used by other PRADO components,
- * such as viewstate persister, cookies.
- *
- * TSecurityManager is mainly used to protect data from being tampered
- * and viewed. It can generate HMAC and encrypt the data.
- * The private key used to generate HMAC is set by {@link setValidationKey ValidationKey}.
- * The key used to encrypt data is specified by {@link setEncryptionKey EncryptionKey}.
- * If the above keys are not explicitly set, random keys will be generated
- * and used.
- *
- * To prefix data with an HMAC, call {@link hashData()}.
- * To validate if data is tampered, call {@link validateData()}, which will
- * return the real data if it is not tampered.
- * The algorithm used to generated HMAC is specified by {@link setValidation Validation}.
- *
- * To encrypt and decrypt data, call {@link encrypt()} and {@link decrypt()}
- * respectively. The encryption algorithm can be set by {@link setEncryption Encryption}.
- *
- * Note, to use encryption, the PHP Mcrypt extension must be loaded.
- *
- * @author Qiang Xue <qiang.xue@gmail.com>
- * @version $Id$
- * @package System.Security
- * @since 3.0
- */
-class TSecurityManager extends TModule
-{
- const STATE_VALIDATION_KEY='prado:securitymanager:validationkey';
- const STATE_ENCRYPTION_KEY='prado:securitymanager:encryptionkey';
- private $_validationKey=null;
- private $_encryptionKey=null;
- private $_validation=TSecurityManagerValidationMode::SHA1;
- private $_encryption='3DES';
-
- /**
- * Initializes the module.
- * The security module is registered with the application.
- * @param TXmlElement initial module configuration
- */
- public function init($config)
- {
- $this->getApplication()->setSecurityManager($this);
- }
-
- /**
- * Generates a random key.
- */
- protected function generateRandomKey()
- {
- return rand().rand().rand().rand();
- }
-
- /**
- * @return string the private key used to generate HMAC.
- * If the key is not explicitly set, a random one is generated and returned.
- */
- public function getValidationKey()
- {
- if($this->_validationKey===null)
- {
- if(($this->_validationKey=$this->getApplication()->getGlobalState(self::STATE_VALIDATION_KEY))===null)
- {
- $this->_validationKey=$this->generateRandomKey();
- $this->getApplication()->setGlobalState(self::STATE_VALIDATION_KEY,$this->_validationKey,null);
- }
- }
- return $this->_validationKey;
- }
-
- /**
- * @param string the key used to generate HMAC
- * @throws TInvalidDataValueException if the key is empty
- */
- public function setValidationKey($value)
- {
- if($value!=='')
- $this->_validationKey=$value;
- else
- throw new TInvalidDataValueException('securitymanager_validationkey_invalid');
- }
-
- /**
- * @return string the private key used to encrypt/decrypt data.
- * If the key is not explicitly set, a random one is generated and returned.
- */
- public function getEncryptionKey()
- {
- if($this->_encryptionKey===null)
- {
- if(($this->_encryptionKey=$this->getApplication()->getGlobalState(self::STATE_ENCRYPTION_KEY))===null)
- {
- $this->_encryptionKey=$this->generateRandomKey();
- $this->getApplication()->setGlobalState(self::STATE_ENCRYPTION_KEY,$this->_encryptionKey,null);
- }
- }
- return $this->_encryptionKey;
- }
-
- /**
- * @param string the key used to encrypt/decrypt data.
- * @throws TInvalidDataValueException if the key is empty
- */
- public function setEncryptionKey($value)
- {
- if($value!=='')
- $this->_encryptionKey=$value;
- else
- throw new TInvalidDataValueException('securitymanager_encryptionkey_invalid');
- }
-
- /**
- * @return TSecurityManagerValidationMode hashing algorithm used to generate HMAC. Defaults to TSecurityManagerValidationMode::SHA1.
- */
- public function getValidation()
- {
- return $this->_validation;
- }
-
- /**
- * @param TSecurityManagerValidationMode hashing algorithm used to generate HMAC.
- */
- public function setValidation($value)
- {
- $this->_validation=TPropertyValue::ensureEnum($value,'TSecurityManagerValidationMode');
- }
-
- /**
- * @return string the algorithm used to encrypt/decrypt data. Defaults to '3DES'.
- */
- public function getEncryption()
- {
- return $this->_encryption;
- }
-
- /**
- * @throws TNotSupportedException Do not call this method presently.
- */
- public function setEncryption($value)
- {
- throw new TNotSupportedException('Currently only 3DES encryption is supported');
- }
-
- /**
- * Encrypts data with {@link getEncryptionKey EncryptionKey}.
- * @param string data to be encrypted.
- * @return string the encrypted data
- * @throws TNotSupportedException if PHP Mcrypt extension is not loaded
- */
- public function encrypt($data)
- {
- if(function_exists('mcrypt_encrypt'))
- {
- $module=mcrypt_module_open(MCRYPT_3DES, '', MCRYPT_MODE_CBC, '');
- $key=substr(md5($this->getEncryptionKey()),0,mcrypt_enc_get_key_size($module));
- srand();
- $iv=mcrypt_create_iv(mcrypt_enc_get_iv_size($module), MCRYPT_RAND);
- mcrypt_generic_init($module,$key,$iv);
- $encrypted=$iv.mcrypt_generic($module,$data);
- mcrypt_generic_deinit($module);
- mcrypt_module_close($module);
- return $encrypted;
- }
- else
- throw new TNotSupportedException('securitymanager_mcryptextension_required');
- }
-
- /**
- * Decrypts data with {@link getEncryptionKey EncryptionKey}.
- * @param string data to be decrypted.
- * @return string the decrypted data
- * @throws TNotSupportedException if PHP Mcrypt extension is not loaded
- */
- public function decrypt($data)
- {
- if(function_exists('mcrypt_decrypt'))
- {
- $module=mcrypt_module_open(MCRYPT_3DES, '', MCRYPT_MODE_CBC, '');
- $key=substr(md5($this->getEncryptionKey()),0,mcrypt_enc_get_key_size($module));
- $ivSize=mcrypt_enc_get_iv_size($module);
- $iv=substr($data,0,$ivSize);
- mcrypt_generic_init($module,$key,$iv);
- $decrypted=mdecrypt_generic($module,substr($data,$ivSize));
- mcrypt_generic_deinit($module);
- mcrypt_module_close($module);
- return rtrim($decrypted,"\0");
- }
- else
- throw new TNotSupportedException('securitymanager_mcryptextension_required');
- }
-
- /**
- * Prefixes data with an HMAC.
- * @param string data to be hashed.
- * @return string data prefixed with HMAC
- */
- public function hashData($data)
- {
- $hmac=$this->computeHMAC($data);
- return $hmac.$data;
- }
-
- /**
- * Validates if data is tampered.
- * @param string data to be validated. The data must be previously
- * generated using {@link hashData()}.
- * @return string the real data with HMAC stripped off. False if the data
- * is tampered.
- */
- public function validateData($data)
- {
- $len=$this->_validation==='SHA1'?40:32;
- if(strlen($data)>=$len)
- {
- $hmac=substr($data,0,$len);
- $data2=substr($data,$len);
- return $hmac===$this->computeHMAC($data2)?$data2:false;
- }
- else
- return false;
- }
-
- /**
- * Computes the HMAC for the data with {@link getValidationKey ValidationKey}.
- * @param string data to be generated HMAC
- * @return string the HMAC for the data
- */
- protected function computeHMAC($data)
- {
- if($this->_validation==='SHA1')
- {
- $pack='H40';
- $func='sha1';
- }
- else
- {
- $pack='H32';
- $func='md5';
- }
- $key=$this->getValidationKey();
- $key=str_pad($func($key), 64, chr(0));
- return $func((str_repeat(chr(0x5C), 64) ^ substr($key, 0, 64)) . pack($pack, $func((str_repeat(chr(0x36), 64) ^ substr($key, 0, 64)) . $data)));
- }
-}
-
-
-/**
- * TSecurityManagerValidationMode class.
- * TSecurityManagerValidationMode defines the enumerable type for the possible validation modes
- * that can be used by {@link TSecurityManager}.
- *
- * The following enumerable values are defined:
- * - MD5: an MD5 hash is generated from the data and used for validation.
- * - SHA1: an SHA1 hash is generated from the data and used for validation.
- *
- * @author Qiang Xue <qiang.xue@gmail.com>
- * @version $Id$
- * @package System.Security
- * @since 3.0.4
- */
-class TSecurityManagerValidationMode extends TEnumerable
-{
- const MD5='MD5';
- const SHA1='SHA1';
-}
-
+ * @license http://www.pradosoft.com/license/
+ * @version $Id$
+ * @package System.Security
+ */
+
+/**
+ * TSecurityManager class
+ *
+ * TSecurityManager provides private keys, hashing and encryption
+ * functionalities that may be used by other PRADO components,
+ * such as viewstate persister, cookies.
+ *
+ * TSecurityManager is mainly used to protect data from being tampered
+ * and viewed. It can generate HMAC and encrypt the data.
+ * The private key used to generate HMAC is set by {@link setValidationKey ValidationKey}.
+ * The key used to encrypt data is specified by {@link setEncryptionKey EncryptionKey}.
+ * If the above keys are not explicitly set, random keys will be generated
+ * and used.
+ *
+ * To prefix data with an HMAC, call {@link hashData()}.
+ * To validate if data is tampered, call {@link validateData()}, which will
+ * return the real data if it is not tampered.
+ * The algorithm used to generated HMAC is specified by {@link setValidation Validation}.
+ *
+ * To encrypt and decrypt data, call {@link encrypt()} and {@link decrypt()}
+ * respectively. The encryption algorithm can be set by {@link setEncryption Encryption}.
+ *
+ * Note, to use encryption, the PHP Mcrypt extension must be loaded.
+ *
+ * @author Qiang Xue <qiang.xue@gmail.com>
+ * @version $Id$
+ * @package System.Security
+ * @since 3.0
+ */
+class TSecurityManager extends TModule
+{
+ const STATE_VALIDATION_KEY = 'prado:securitymanager:validationkey';
+ const STATE_ENCRYPTION_KEY = 'prado:securitymanager:encryptionkey';
+
+ private $_validationKey = null;
+ private $_encryptionKey = null;
+ private $_validation = TSecurityManagerValidationMode::SHA1;
+ private $_encryption = '3DES';
+
+ /**
+ * Initializes the module.
+ * The security module is registered with the application.
+ * @param TXmlElement initial module configuration
+ */
+ public function init($config)
+ {
+ $this->getApplication()->setSecurityManager($this);
+ }
+
+ /**
+ * Generates a random key.
+ */
+ protected function generateRandomKey()
+ {
+ return rand().rand().rand().rand();
+ }
+
+ /**
+ * @return string the private key used to generate HMAC.
+ * If the key is not explicitly set, a random one is generated and returned.
+ */
+ public function getValidationKey()
+ {
+ if(null === $this->_validationKey) {
+ if(null === ($this->_validationKey = $this->getApplication()->getGlobalState(self::STATE_VALIDATION_KEY))) {
+ $this->_validationKey = $this->generateRandomKey();
+ $this->getApplication()->setGlobalState(self::STATE_VALIDATION_KEY, $this->_validationKey, null);
+ }
+ }
+ return $this->_validationKey;
+ }
+
+ /**
+ * @param string the key used to generate HMAC
+ * @throws TInvalidDataValueException if the key is empty
+ */
+ public function setValidationKey($value)
+ {
+ if('' === $value)
+ throw new TInvalidDataValueException('securitymanager_validationkey_invalid');
+
+ $this->_validationKey = $value;
+ }
+
+ /**
+ * @return string the private key used to encrypt/decrypt data.
+ * If the key is not explicitly set, a random one is generated and returned.
+ */
+ public function getEncryptionKey()
+ {
+ if(null === $this->_encryptionKey) {
+ if(null === ($this->_encryptionKey = $this->getApplication()->getGlobalState(self::STATE_ENCRYPTION_KEY))) {
+ $this->_encryptionKey = $this->generateRandomKey();
+ $this->getApplication()->setGlobalState(self::STATE_ENCRYPTION_KEY, $this->_encryptionKey, null);
+ }
+ }
+ return $this->_encryptionKey;
+ }
+
+ /**
+ * @param string the key used to encrypt/decrypt data.
+ * @throws TInvalidDataValueException if the key is empty
+ */
+ public function setEncryptionKey($value)
+ {
+ if('' === $value)
+ throw new TInvalidDataValueException('securitymanager_encryptionkey_invalid');
+
+ $this->_encryptionKey = $value;
+ }
+
+ /**
+ * @return TSecurityManagerValidationMode hashing algorithm used to generate HMAC. Defaults to TSecurityManagerValidationMode::SHA1.
+ */
+ public function getValidation()
+ {
+ return $this->_validation;
+ }
+
+ /**
+ * @param TSecurityManagerValidationMode hashing algorithm used to generate HMAC.
+ */
+ public function setValidation($value)
+ {
+ $this->_validation = TPropertyValue::ensureEnum($value, 'TSecurityManagerValidationMode');
+ }
+
+ /**
+ * @return string the algorithm used to encrypt/decrypt data. Defaults to '3DES'.
+ */
+ public function getEncryption()
+ {
+ return $this->_encryption;
+ }
+
+ /**
+ * @throws TNotSupportedException Do not call this method presently.
+ */
+ public function setEncryption($value)
+ {
+ throw new TNotSupportedException('Currently only 3DES encryption is supported');
+ }
+
+ /**
+ * Encrypts data with {@link getEncryptionKey EncryptionKey}.
+ * @param string data to be encrypted.
+ * @return string the encrypted data
+ * @throws TNotSupportedException if PHP Mcrypt extension is not loaded
+ */
+ public function encrypt($data)
+ {
+ if(!function_exists('mcrypt_encrypt'))
+ throw new TNotSupportedException('securitymanager_mcryptextension_required');
+
+ $module = mcrypt_module_open(MCRYPT_3DES, '', MCRYPT_MODE_CBC, '');
+ $key = substr(md5($this->getEncryptionKey()), 0, mcrypt_enc_get_key_size($module));
+ srand();
+ $iv = mcrypt_create_iv(mcrypt_enc_get_iv_size($module), MCRYPT_RAND);
+ mcrypt_generic_init($module, $key, $iv);
+ $encrypted = $iv.mcrypt_generic($module, $data);
+ mcrypt_generic_deinit($module);
+ mcrypt_module_close($module);
+ return $encrypted;
+ }
+
+ /**
+ * Decrypts data with {@link getEncryptionKey EncryptionKey}.
+ * @param string data to be decrypted.
+ * @return string the decrypted data
+ * @throws TNotSupportedException if PHP Mcrypt extension is not loaded
+ */
+ public function decrypt($data)
+ {
+ if(!function_exists('mcrypt_decrypt'))
+ throw new TNotSupportedException('securitymanager_mcryptextension_required');
+
+ $module = mcrypt_module_open(MCRYPT_3DES, '', MCRYPT_MODE_CBC, '');
+ $key = substr(md5($this->getEncryptionKey()), 0, mcrypt_enc_get_key_size($module));
+ $ivSize = mcrypt_enc_get_iv_size($module);
+ $iv = substr($data, 0, $ivSize);
+ mcrypt_generic_init($module, $key, $iv);
+ $decrypted = mdecrypt_generic($module, substr($data, $ivSize));
+ mcrypt_generic_deinit($module);
+ mcrypt_module_close($module);
+ return $decrypted;
+ }
+
+ /**
+ * Prefixes data with an HMAC.
+ * @param string data to be hashed.
+ * @return string data prefixed with HMAC
+ */
+ public function hashData($data)
+ {
+ $hmac = $this->computeHMAC($data);
+ return $hmac.$data;
+ }
+
+ /**
+ * Validates if data is tampered.
+ * @param string data to be validated. The data must be previously
+ * generated using {@link hashData()}.
+ * @return string the real data with HMAC stripped off. False if the data
+ * is tampered.
+ */
+ public function validateData($data)
+ {
+ $len = 'SHA1' === $this->_validation ? 40 : 32;
+ if(strlen($data) < $len)
+ return false;
+
+ $hmac = substr($data, 0, $len);
+ $data2 = substr($data, $len);
+ return $hmac === $this->computeHMAC($data2) ? $data2 : false;
+ }
+
+ /**
+ * Computes the HMAC for the data with {@link getValidationKey ValidationKey}.
+ * @param string data to be generated HMAC
+ * @return string the HMAC for the data
+ */
+ protected function computeHMAC($data)
+ {
+ if('SHA1' === $this->_validation) {
+ $pack = 'H40';
+ $func = 'sha1';
+ } else {
+ $pack = 'H32';
+ $func = 'md5';
+ }
+ $key = $this->getValidationKey();
+ $key = str_pad($func($key), 64, chr(0));
+ return $func((str_repeat(chr(0x5C), 64) ^ substr($key, 0, 64)) . pack($pack, $func((str_repeat(chr(0x36), 64) ^ substr($key, 0, 64)) . $data)));
+ }
+}
+
+/**
+ * TSecurityManagerValidationMode class.
+ * TSecurityManagerValidationMode defines the enumerable type for the possible validation modes
+ * that can be used by {@link TSecurityManager}.
+ *
+ * The following enumerable values are defined:
+ * - MD5: an MD5 hash is generated from the data and used for validation.
+ * - SHA1: an SHA1 hash is generated from the data and used for validation.
+ *
+ * @author Qiang Xue <qiang.xue@gmail.com>
+ * @version $Id$
+ * @package System.Security
+ * @since 3.0.4
+ */
+class TSecurityManagerValidationMode extends TEnumerable
+{
+ const MD5 = 'MD5';
+ const SHA1 = 'SHA1';
+}