问题描述
我正在尝试使用在JavaScript中为GnuPG加密文件编写示例解密器。
I'm trying to write a sample decryptor for GnuPG encrypted files in JavaScript using openpgp.js.
所以我天真地试了一下，甚至没有询问它是否可能。我做了以下页面。
So I tried it naively without even asking if it is even possible. I made the following page.
popup.html
<!doctype html>
<!--
-->
<html>
<head>
<title>Popup</title>
<script src="openpgp.js"></script>
<script src="popup.js"></script>
</head>
<body>
<p>Upload message: </p><input id="message" type="file"/><br>
<p>Upload secret key: </p><input id="secret" type="file"/><br>
<p>Secret key password: </p><input id="password" type="password"/><br><br>
<button id="decrypt">Decrypt</button>
<p id="output"></p>
<div id="loadingDiv"></div>
</body>
</html>
popup.js
var message = "";
var secret = "";
function readMessage (e) {
var file = e.target.files[0];
if (!file) {
message = "";
}
var reader = new FileReader();
reader.onload = function (e) {
message = e.target.result;
};
reader.readAsText (file);
}
function readSecret (e) {
var file = e.target.files[0];
if (!file) {
secret = "";
}
var reader = new FileReader();
reader.onload = function (e) {
secret = e.target.result;
};
reader.readAsText (file);
}
function loadScript(url, callback)
{
var head = document.getElementsByTagName ("head")[0];
var script = document.createElement ("script");
script.type = "text/javascript";
script.src = url;
script.onreadystatechange = callback;
script.onload = callback;
head.appendChild(script);
}
document.addEventListener ("DOMContentLoaded", function() {
document.getElementById ("message").addEventListener("change", readMessage, false);
document.getElementById ("secret").addEventListener("change", readSecret, false);
var gen = function() {
document.getElementById ("decrypt").addEventListener ("click", function() {
var output = document.getElementById ("output");
output.style.color = "black";
if (document.getElementById ("message").value == "") {
output.innerHTML = "No message provided";
output.style.color = "red";
}
else if (document.getElementById ("secret").value == "") {
output.innerHTML = "No secret key provided";
output.style.color = "red";
}
else if (document.getElementById ("password").value == "") {
output.innerHTML = "No password for secret key provided";
output.style.color = "red";
}
else {
var privateKey = openpgp.key.readArmored (secret).keys[0];
var isCorrect = privateKey.decrypt (document.getElementById ("password").value);
if (isCorrect) {
output.innerHTML = "";
output.style.color = "black";
var img = document.createElement ("img");
img.src = "loading.gif";
img.id = "loading";
document.getElementById ("loadingDiv").appendChild (img);
message = openpgp.message.readArmored (message);
openpgp.decryptMessage (privateKey, message).then (function (plaintext) {
output.innerHTML = plaintext;
}).catch (function(error) {
output.innerHTML = "Error while decrypting";
output.style.color = "red";
});
}
else {
output.innerHTML = "Incorrect password";
output.style.color = "red";
}
}
});
}
loadScript ("openpgp.js", gen);
});
openpgp.js给出未知的ASCII装甲类型错误 message = openpgp.message.readArmored（message）; 。
openpgp.js gives an Unknown ASCII armor type error on message = openpgp.message.readArmored (message);.
那么可能吗？如果是，我应该做些不同的事情吗？
So is it possible? If it is, should I do something different?
推荐答案
OpenPGP知道消息的编码，
OpenPGP knows to encodings of messages,
- 二进制消息，空间效率更高且
- ASCII装甲消息以类似于base64的格式编码，通过不同的通道传输时作为纯文本提供更高的可靠性。
- binary messages, which are more space-efficient and
- ASCII-armored messages encoded in a format similar to base64, providing higher reliability when transmitted through different channels as being plain text.
openpgp.message.readArmored（message）只能理解ASCII装甲信息。请改用 openpgp.message.fromBinary（message）。作为替代方案，在加密时使用 - armor 选项通过GnuPG对消息进行编码，或者 gpg --enarmor 已加密的二进制消息。
openpgp.message.readArmored (message) only understands ASCII-armored information. use openpgp.message.fromBinary (message) instead. As an alternative, encode the message through GnuPG using the --armor option while encrypting, or gpg --enarmor an already encrypted binary message.
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