JavaScript:使用openpgp.js解密GnuPG加密文件的内容

Question

JavaScript:使用openpgp.js解密GnuPG加密文件的内容

Kud*_*aev 5 javascript gnupg pgp openpgp.js

我正在尝试使用openpgp.js在JavaScript中为GnuPG加密文件编写示例解密器.

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.

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>

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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);
});

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openpgp.js给出Unknown ASCII armor type错误message = openpgp.message.readArmored (message);.

那有可能吗？如果是的话,我应该做些不同的事吗？

Answer 1

Jen*_*rat 1

OpenPGP 知道消息的编码，

二进制消息，更节省空间并且
ASCII 装甲消息以类似于 Base64 的格式编码，在通过不同通道作为纯文本传输时提供更高的可靠性。

openpgp.message.readArmored (message)只理解 ASCII 装甲信息。openpgp.message.fromBinary (message)代替使用。作为替代方案，在加密时使用选项通过 GnuPG 对消息--armor或gpg --enarmor已加密的二进制消息进行编码。

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