PHP7 openssl函数替换mcrypt函数加密解密
以下是两者的区别及openssl替换mcrypt的方法：
替代
$key = '-2i61^';
$iv = '&11r2(*3';
$data = "123456789"; //要加密的数据
if(PHP_VERSION<5.6){
$a= base64_encode(mcrypt_encrypt(MCRYPT_3DES,$key,$data,MCRYPT_MODE_CBC,$iv));
echo 'mcrypt_encrypt:'.$a.'
';
//rtrim 移除字符串右侧的空白字符
$decrypt = rtrim(mcrypt_decrypt(MCRYPT_3DES,$key,base64_decode($a),MCRYPT_MODE_CBC,$iv),'\0');
echo 'mcrypt_decrypt:'.$decrypt.'
';
} //使用mcrypt函数来对比
$len = strlen($data);
if($len%8){
$data = str_pad($data,$len+8-$len%8,"\0");
}//使用空字符填充字符串的右侧,使字符串位数变为8的倍数
$b = base64_encode(openssl_encrypt($data,'DES-EDE3-CBC',$key,OPENSSL_RAW_DATA|OPENSSL_NO_PADDING,$iv));
echo "openssl_encrypt:".$b. '
';
$decrypt = openssl_decrypt(base64_decode($b),'DES-EDE3-CBC',$key,OPENSSL_RAW_DATA|OPENSSL_NO_PADDING,$iv);
echo 'openssl_decrypt:'.$decrypt.'
';运行结果
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mcrypt_encrypt:O4/3PssvAkrYtIlhbQEr+g== mcrypt_decrypt:123456789 openssl_encrypt:O4/3PssvAkrYtIlhbQEr+g== openssl_decrypt:123456789
然后来个对比，看看这两个函数的速度：
$key = '-2i61^';
$iv = '&11r2(*3';
$data = "123456789";
if(PHP_VERSION<5.6){
$start = microtime(true);
for($i=0;$i<10000;$i++){
$a= base64_encode(mcrypt_encrypt(MCRYPT_3DES,$key,$data,MCRYPT_MODE_CBC,$iv));
}
echo 'mcrypt_time:'; echo microtime(true)-$start.'
';
echo 'mcrypt_encrypt'.$a.'
';
$decrypt = rtrim(mcrypt_decrypt(MCRYPT_3DES,$key,base64_decode($a),MCRYPT_MODE_CBC,$iv),'\0');
echo 'mcrypt_decrypt'.$decrypt.'
';
}
$start = microtime(true);
for($i=0;$i<10000;$i++){
$len = strlen($data);
if($len%8){
$data = str_pad($data,$len+8-$len%8,"\0");
}
$b = base64_encode(openssl_encrypt($data,'DES-EDE3-CBC',$key,OPENSSL_RAW_DATA|OPENSSL_NO_PADDING,$iv));
}
echo "openssl_time:"; echo microtime(true)-$start . '
';
echo "openssl_encrypt:".$b. '
';
$decrypt = openssl_decrypt(base64_decode($b),'DES-EDE3-CBC',$key,OPENSSL_RAW_DATA|OPENSSL_NO_PADDING,$iv);
echo 'openssl_decrypt'.$decrypt.'
';结果
mcrypt_time:1.8425710201263 mcrypt_encryptO4/3PssvAkrYtIlhbQEr+g== mcrypt_decrypt123456789 openssl_time:0.023201942443848 openssl_encrypt:O4/3PssvAkrYtIlhbQEr+g== openssl_decrypt123456789
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