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43
pgserver/application/lib/MySm4.php
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43
pgserver/application/lib/MySm4.php
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<?php
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namespace app\lib;
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class MySm4 {
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public function __construct($key) {
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$this->key = $key;
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}
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/**
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* 加密
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* @param $plaintext
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* @return string
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*/
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public function encrypt($plaintext) {
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// 将密钥从十六进制转换为二进制
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$key = hex2bin($this->key);
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// 使用OpenSSL进行SM4加密,这里使用ECB模式
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$ciphertext = openssl_encrypt($plaintext, 'sm4-ecb', $key, OPENSSL_RAW_DATA);
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// 返回加密后的密文
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return bin2hex($ciphertext);
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}
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/**
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* 解密
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* @param $ciphertext
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* @return false|string
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*/
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public function decrypt($ciphertext) {
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// 将密钥从十六进制转换为二进制
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$key = hex2bin($this->key);
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// 将密文从十六进制转换为二进制
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$ciphertext = hex2bin($ciphertext);
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// 使用OpenSSL进行SM4解密
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$plaintext = openssl_decrypt($ciphertext, 'sm4-ecb', $key, OPENSSL_RAW_DATA);
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// 返回解密后的明文
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return $plaintext;
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}
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}
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