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68 lines
1.7 KiB
68 lines
1.7 KiB
<?php
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namespace com;
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/**
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* 对称加密解密
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*/
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class Cryptdes
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{
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// 加密方式
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const METHOD = 'AES-256-CBC';
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public $key;
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public $error = '';
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public $ivStatus;
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public function __construct($key, $ivStatus = true)
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{
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if (!function_exists('openssl_encrypt') || !function_exists('openssl_decrypt')) {
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$this->error = '未启用 openssl 扩展，请开启。';
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}
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$this->ivStatus = $ivStatus;
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$this->key = $key;
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}
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/**
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* 加密
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*/
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public function encrypt($data)
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{
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$str_padded = json_encode($data);
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if (strlen($str_padded) % 16) {
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$str_padded = str_pad($str_padded, strlen($str_padded) + 16 - strlen($str_padded) % 16, "\0");
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}
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if ($this->ivStatus) {
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$iv = $this->makeIv();
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$code = openssl_encrypt($str_padded, SELF::METHOD, $this->key, OPENSSL_NO_PADDING, $iv);
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return [
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'iv' => base64_encode($iv),
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'code' => base64_encode($code)
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];
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} else {
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$code = openssl_encrypt($str_padded, SELF::METHOD, $this->key, OPENSSL_NO_PADDING);
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return base64_encode($code);
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}
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}
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/**
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* 解密
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*/
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public function decrypt($code, $iv = '')
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{
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$code = base64_decode($code);
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$iv = base64_decode($iv);
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$res = openssl_decrypt($code, SELF::METHOD, $this->key, OPENSSL_NO_PADDING, $iv);
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return json_decode(trim($res), true);
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}
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/**
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* 生成 初始化向量 iv
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*/
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public function makeIv()
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{
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$ivlen = openssl_cipher_iv_length(SELF::METHOD);
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return openssl_random_pseudo_bytes($ivlen);
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}
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} |