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<?php |
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ar_pinp::allow( 'ar_crypt' ); |
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4
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class ar_crypt extends arBase { |
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private $key; |
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private $encoding; |
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private $iv; |
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private $api; |
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private $mode = MCRYPT_MODE_CBC; |
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public function __construct( $key = null, $encoding = MCRYPT_RIJNDAEL_256, $api=0) { |
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global $AR; |
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$this->encoding = $encoding; |
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$this->api = $api; |
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$this->key = $key; |
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if ($this->api === 0 ) { |
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// this api will be deprecated in the future |
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// we also try to be backwards compatible with pre php 5.6 |
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if ($key == null) { |
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$key = $AR->sgSalt; |
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} |
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$keysizes = mcrypt_module_get_supported_key_sizes($this->encoding, $this->mode); |
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sort($keysizes); |
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$keysize = end ($keysizes); |
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foreach($keysizes as $keysize){ |
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if($keysize >= strlen($key)) { |
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break; |
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} |
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} |
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$this->key = str_pad(substr($key,0,$keysize), $keysize, "\0"); |
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} |
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} |
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public function setApi($api) { |
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$this->api = $api; |
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} |
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public function setKey( $key ) { |
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if ($this->api === 0 ) { |
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$keysizes = mcrypt_module_get_supported_key_sizes($this->encoding, $this->mode); |
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sort($keysizes); |
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$keysize = end ($keysizes); |
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foreach($keysizes as $keysize){ |
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if($keysize > strlen($key)) { |
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break; |
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} |
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} |
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$this->key = str_pad(substr($key,0,$keysize), $keysize, "\0"); |
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} else { |
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$this->key = $key; |
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} |
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} |
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public function crypt( $value ) { |
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if ($this->api === 0 ) { |
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$iv = str_pad('',mcrypt_get_iv_size ( $this->encoding, $this->mode),"\0"); |
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return base64_encode(mcrypt_encrypt($this->encoding, $this->key, $value, $this->mode,$iv)); |
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} else { |
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$ivsize = mcrypt_get_iv_size ( $this->encoding, $this->mode); |
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$iv = mcrypt_create_iv ( $ivsize , MCRYPT_DEV_URANDOM); |
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$encrypted = mcrypt_encrypt($this->encoding, $this->key, $value, $this->mode,$iv); |
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if($encrypted !== false) { |
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return base64_encode($iv . $encrypted); |
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} else { |
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return false; |
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} |
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} |
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} |
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public function decrypt( $value ) { |
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if ($this->api === 0 ) { |
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$iv = str_pad('',mcrypt_get_iv_size ( $this->encoding, $this->mode),"\0"); |
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return trim(mcrypt_decrypt($this->encoding, $this->key, base64_decode($value), $this->mode,$iv), "\0"); |
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} else { |
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$decoded = base64_decode($value); |
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$ivsize = mcrypt_get_iv_size ( $this->encoding, $this->mode); |
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$iv = substr($decoded, 0, $ivsize); |
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if($ivsize != strlen($iv)) { |
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return false; |
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} |
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$encrypted = substr($decoded, $ivsize); |
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return trim(mcrypt_decrypt($this->encoding, $this->key, $encrypted, $this->mode,$iv), "\0"); |
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} |
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} |
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public function pbkdf2($password, $salt, $count=5000, $key_length = null, $raw_output = true) { |
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$algorithm = 'sha512'; |
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if(is_null($key_length)) { |
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$key_length = mcrypt_get_key_size ( $this->encoding, $this->mode ); |
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} |
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$algorithm = strtolower($algorithm); |
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if(!in_array($algorithm, hash_algos(), true)){ |
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// fixme, return ar('error'); |
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trigger_error('PBKDF2 ERROR: Invalid hash algorithm.', E_USER_ERROR); |
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} |
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if($count <= 0 || $key_length <= 0) { |
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// fixme, return ar('error'); |
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trigger_error('PBKDF2 ERROR: Invalid parameters.', E_USER_ERROR); |
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} |
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if (function_exists("hash_pbkdf2")) { |
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// The output length is in NIBBLES (4-bits) if $raw_output is false! |
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if (!$raw_output) { |
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$key_length = $key_length * 2; |
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} |
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return hash_pbkdf2($algorithm, $password, $salt, $count, $key_length, $raw_output); |
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} |
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$hash_length = strlen(hash($algorithm, "", true)); |
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$block_count = ceil($key_length / $hash_length); |
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$output = ""; |
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for($i = 1; $i <= $block_count; $i++) { |
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// $i encoded as 4 bytes, big endian. |
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$last = $salt . pack("N", $i); |
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// first iteration |
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$last = $xorsum = hash_hmac($algorithm, $last, $password, true); |
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// perform the other $count - 1 iterations |
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for ($j = 1; $j < $count; $j++) { |
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$xorsum ^= ($last = hash_hmac($algorithm, $last, $password, true)); |
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} |
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$output .= $xorsum; |
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} |
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if($raw_output){ |
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return substr($output, 0, $key_length); |
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} else { |
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return base64_encode(substr($output, 0, $key_length)); |
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} |
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} |
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} |
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Ariadne-CMS /
ariadne
This check marks private properties in classes that are never used. Those properties can be removed.