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<?php |
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/** |
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* 参考来源 |
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* http://www.mayanlong.com/archives/2018/des.html#comment-1147 |
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*/ |
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namespace tinymeng\Chinaums\Tools; |
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/** |
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* openssl 实现的 DES 加密类，支持各种 PHP 版本 |
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*/ |
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class DES |
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{ |
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/** |
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* @var string $method 加解密方法，可通过 openssl_get_cipher_methods() 获得 |
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*/ |
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protected $method; |
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/** |
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* @var string $key 加解密的密钥 |
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*/ |
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protected $key; |
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/** |
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* @var string $output 输出格式 无、base64、hex |
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*/ |
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protected $output; |
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/** |
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* @var string $iv 加解密的向量 |
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*/ |
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protected $iv; |
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/** |
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* @var string $options |
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*/ |
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protected $options; |
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// output 的类型 |
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const OUTPUT_NULL = ''; |
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const OUTPUT_BASE64 = 'base64'; |
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const OUTPUT_HEX = 'hex'; |
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/** |
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* DES constructor. |
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* @param string $key |
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* @param string $method |
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* ECB DES-ECB、DES-EDE3 （为 ECB 模式时，$iv 为空即可） |
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* CBC DES-CBC、DES-EDE3-CBC、DESX-CBC |
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* CFB DES-CFB8、DES-EDE3-CFB8 |
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* CTR |
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* OFB |
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* |
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* @param string $output |
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* base64、hex |
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* |
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* @param string $iv |
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* @param int $options |
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*/ |
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public function __construct($key, $method = 'DES-ECB', $output = '', $iv = '', $options = OPENSSL_RAW_DATA | OPENSSL_NO_PADDING) |
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{ |
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$this->key = $key; |
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$this->method = $method; |
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$this->output = $output; |
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$this->iv = $iv; |
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$this->options = $options; |
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} |
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/** |
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* 加密 |
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* |
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* @param $str |
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* @return string |
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*/ |
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public function encrypt($str) |
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{ |
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$str = $this->pkcsPadding($str, 8); |
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$sign = openssl_encrypt($str, $this->method, $this->key, $this->options, $this->iv); |
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if ($this->output == self::OUTPUT_BASE64) { |
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$sign = base64_encode($sign); |
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} else if ($this->output == self::OUTPUT_HEX) { |
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$sign = bin2hex($sign); |
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} |
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return $sign; |
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} |
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/** |
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* 解密 |
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* |
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* @param $encrypted |
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* @return string |
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*/ |
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public function decrypt($encrypted) |
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{ |
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if ($this->output == self::OUTPUT_BASE64) { |
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$encrypted = base64_decode($encrypted); |
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} else if ($this->output == self::OUTPUT_HEX) { |
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$encrypted = hex2bin($encrypted); |
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} |
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$sign = @openssl_decrypt($encrypted, $this->method, $this->key, $this->options, $this->iv); |
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$sign = $this->unPkcsPadding($sign); |
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$sign = rtrim($sign); |
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return $sign; |
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} |
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/** |
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* 填充 |
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* |
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* @param $str |
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* @param $blocksize |
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* @return string |
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*/ |
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private function pkcsPadding($str, $blocksize) |
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{ |
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$pad = $blocksize - (strlen($str) % $blocksize); |
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return $str . str_repeat(chr($pad), $pad); |
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} |
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/** |
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* 去填充 |
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* |
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* @param $str |
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* @return string |
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*/ |
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private function unPkcsPadding($str) |
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{ |
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$pad = ord($str[strlen($str) - 1]); |
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if ($pad > strlen($str)) { |
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return false; |
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} |
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return substr($str, 0, -1 * $pad); |
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} |
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} |
majiameng /
chinaums-php
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