| public rsaDecrypt ( $content, $private_key_path ) : string | ||
| $content | string 需要解密的内容，密文 | |
| $private_key_path | string 商户私钥文件路径 | |
| return | string | 解密后内容，明文 |
function rsaDecrypt($content, $private_key_path)
{
$priKey = file_get_contents($private_key_path);
$res = openssl_get_privatekey($priKey);
//用base64将内容还原成二进制
$content = base64_decode($content);
//把需要解密的内容，按128位拆开解密
$result = '';
for ($i = 0; $i < strlen($content) / 128; $i++) {
$data = substr($content, $i * 128, 128);
openssl_private_decrypt($data, $decrypt, $res);
$result .= $decrypt;
}
openssl_free_key($res);
return $result;
}