如何使用PHP将数字签名(RSA，证书等)添加到任何文件中? [英] How to add digital signature (RSA, Certificate, etc) to any of file, using PHP?

问题描述

我需要知道是否可以使用RSA，证书以及类似的东西对任何类型的文件进行数字签名，或者是否只能对某些类型的文件进行签名.所有这些，使用PHP.

I need to know if any kind of file can be signed digitally, using RSA, a certificate, and that stuff, or if only certain kind of files can be signed. All this, using PHP.

例如:可以对纯文本文件进行数字签名吗?图像(png，jpeg，bmp)如何?

In example: Can a plain text file be signed digitally?, What about images (png, jpeg, bmp)?

我不需要附加"带有图形签名的图像.

I don't need to "attach" an image with a graphic signature.

谢谢您的帮助.

推荐答案

使用 phpseclib，纯PHP RSA实现(已更新此处):

<?php
include('Crypt/RSA.php');

$rsa = new Crypt_RSA();
extract($rsa->createKey());

$plaintext = 'terrafrost';

$rsa->loadKey($privatekey);
$signature = $rsa->sign($plaintext);

$rsa->loadKey($publickey);
echo $rsa->verify($plaintext, $signature) ? 'verified' : 'unverified';
?>

与CLI openssl类似，如下所示:

The analog to that with the CLI openssl is as follows:

openssl dgst -sha1 -sigopt rsa_padding_mode:pss -sigopt rsa_pss_saltlen:-1 -out signature.txt -sign privatekey.txt plaintext.txt 
openssl dgst -sha1 -sigopt rsa_padding_mode:pss -sigopt rsa_pss_saltlen:-1 -prverify privatekey.txt -signature signature.txt plaintext.txt 

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