在 PHP 中模拟 WebCrypto RSA-OAEP 加密 [英] simulate WebCrypto RSA-OAEP encryption in PHP
问题描述
我们有一个使用 RSA-OAEP 从客户端接收数据的服务器.
We have a server which is using RSA-OAEP to receive data from client.
我无权访问服务器,检查结果的唯一方法是发送请求并检查其回复.
I don't have access to server and the only way to check my result is to send a request and check its reply.
我已经能够使用 WebCrypto 发送正确的请求,但我没有使用 php 成功.
I've been able to send correct request with WebCrypto but I didn't have any success with php.
我用于 JS 的代码:
the code I'm using for JS :
var DataToEncrypt = 'abcd';
var pemEncodedKey = `-----BEGIN PUBLIC KEY-----
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
-----END PUBLIC KEY-----`;
let encryptionKey;
function str2ab(str) {
const buf = new ArrayBuffer(str.length);
const bufView = new Uint8Array(buf);
for (let i = 0, strLen = str.length; i < strLen; i++) {
bufView[i] = str.charCodeAt(i);
}
return buf;
}
function importPublicKey(pem) {
const pemHeader = "-----BEGIN PUBLIC KEY-----";
const pemFooter = "-----END PUBLIC KEY-----";
const pemContents = pem.substring(pemHeader.length, pem.length - pemFooter.length);
const binaryDerString = window.atob(pemContents);
const binaryDer = str2ab(binaryDerString);
return window.crypto.subtle.importKey(
"spki",
binaryDer,
{
name: "RSA-OAEP",
hash: "SHA-256"
},
true,
["encrypt"]
);
}
function getMessageEncoding() {
const enc = new TextEncoder();
return enc.encode(DataToEncrypt);
}
async function encryptMessage() {
const encoded = getMessageEncoding();
const ciphertext = await window.crypto.subtle.encrypt(
{
name: "RSA-OAEP"
},
encryptionKey,
encoded
);
var decoder = new TextDecoder('utf8');
var b64encoded = btoa(String.fromCharCode.apply(null, new Uint8Array(ciphertext)));
document.getElementById('crypt').value = b64encoded;
}
document.getElementById('import').addEventListener("click", async () => {
encryptionKey = await importPublicKey(pemEncodedKey);
});
document.getElementById('encrypt').addEventListener("click", function(){
encryptMessage();
});
这是我的 php 函数(使用 phpseclib):
and this is my php function (using phpseclib) :
function encrypt($data) {
$key = '-----BEGIN PUBLIC KEY-----
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
-----END PUBLIC KEY-----';
$rsa = new Crypt_RSA();
$rsa->setHash('sha256');
$rsa->setEncryptionMode(CRYPT_RSA_ENCRYPTION_OAEP);
$rsa->loadKey($key); // public key
$crypted = $rsa->encrypt($data);
return base64_encode($crypted);
}
echo encrypt('abcd');
我尝试了这两种方法,结果都向服务器发送请求,正如我之前提到的,只有 js 代码有效,而 php 输出没有按预期工作.
I tried both of these methods result to send a request to server and as I mentioned earlier only js code works and php output does not work as expected.
推荐答案
我尝试使用我生成的一对公钥/私钥使用 js 加密某些内容并使用 php (phpseclib) 对其进行解密,并且成功了.
I tried to encrypt something with js and decrypt it with php (phpseclib) using a pair of public/private keys which I produced and it was successful.
在那之后,我尝试将我的公钥重新格式化为每行 64 个字符(它与 js 中的一样在一行中)并同时使用 setHash('sha256') 和 setMGFHash('sha256'),现在我的php 函数有效.
After that I tried to reformat my public key to 64 chars in each line (it was in a single line like the one in js) and used both setHash('sha256') and setMGFHash('sha256') and now my php function works.
新的php函数:
function encrypt($data)
{
$key = '-----BEGIN PUBLIC KEY-----
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
XXXXXXXX
-----END PUBLIC KEY-----';
$rsa = new Crypt_RSA();
$rsa->setHash('sha256');
$rsa->setMGFHash('sha256');
$lk = $rsa->loadKey($key); // public key
$crypted = $rsa->encrypt($data);
return base64_encode($crypted);
}
这篇关于在 PHP 中模拟 WebCrypto RSA-OAEP 加密的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!