我在这个文件中有这个错误：
<?php
// $data and $signature are assumed to contain the data and the signature
$signature = null;
$toSign = "C:/Users/User/Desktop/xampp/htdocs/docum.docx";
$fp = fopen("key.pem", "r");
$priv_key = fread($fp, 8192);
fclose($fp);
$pkeyid = openssl_get_privatekey($priv_key);
openssl_sign($toSign, $signature, $pkeyid);
openssl_free_key($pkeyid);
echo($signature);
// fetch public key from certificate and ready it
$fp = fopen("C:/Users/User/Desktop/xampp/htdocs/pubkey.der", "r");
$cert = fread($fp, 8192);
fclose($fp);
$pubkeyid = openssl_get_publickey($cert);
// state whether signature is okay or not
$ok = openssl_verify($toSign, $signature, $pubkeyid);
if ($ok == 1) {
echo "good";
} elseif ($ok == 0) {
echo "bad";
} else {
echo "ugly, error checking signature";
}
// free the key from memory
openssl_free_key($pubkeyid);
?>
我该如何修复这个错误？`。。。我用文档的私钥计算了签名，现在我想测试它。起初，我创建了两个php文件，第一个用于签署文档，第二个用于ke-me签名。我只是不知道如何从第一份文件上取下签名。何决定把这一切放在一起尝试。。。我该如何修复？
- 您是否完全确定您的公钥文件短于8192字节？如果您只是想使用
file_get_contents()将文件读取到变量中，那么它要简单得多 openssl_get_publickey($cert)返回了什么- 根据您得到的错误，看起来OpenSSL需要PEM格式的密钥，所以您需要对其进行转换
尝试：
function der2pem($der_data) {
$pem = chunk_split(base64_encode($der_data), 64, "'n");
$pem = "-----BEGIN CERTIFICATE-----'n".$pem."-----END CERTIFICATE-----'n";
return $pem;
}
$cert = der2pem(file_get_contents('C:/Users/User/Desktop/xampp/htdocs/pubkey.der'));
if( ! $pubkeyid = openssl_get_publickey($cert) ) {
throw new 'Exception(openssl_error_string());
}