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decrypt.html
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decrypt.html
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<!DOCTYPE html>
<meta name='viewport' content='width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0'>
<meta name='apple-mobile-web-app-capable' content='yes'>
<meta name='apple-mobile-web-app-status-bar-style' content='black'>
<meta name='format-detection' content='telephone=no'>
<meta charset="utf-8">
<html>
<head>
<title>解密或签名验证</title>
<link href="css/style.css" rel="stylesheet" type="text/css" />
<link rel="stylesheet" href="https://cdn.staticfile.org/twitter-bootstrap/4.5.0/css/bootstrap.min.css">
<script src="https://cdn.staticfile.org/openpgp/4.10.4/openpgp.min.js"
integrity="sha384-/N1ZJTH7aZFvzCM9Jy9dQmQzroYQpB5L2qrNPgYpg1/tbwVDvaqWwGHfHeFhSpcn"
crossorigin="anonymous" defer></script>
<script src="https://cdn.staticfile.org/jquery/3.5.1/jquery.min.js"
integrity="sha384-ZvpUoO/+PpLXR1lu4jmpXWu80pZlYUAfxl5NsBMWOEPSjUn/6Z/hRTt8+pR6L4N2"
crossorigin="anonymous"></script>
<script src="https://cdn.staticfile.org/twitter-bootstrap/4.5.0/js/bootstrap.bundle.min.js"
integrity="sha384-1CmrxMRARb6aLqgBO7yyAxTOQE2AKb9GfXnEo760AUcUmFx3ibVJJAzGytlQcNXd"
crossorigin="anonymous" defer></script>
<script src="https://cdn.staticfile.org/twitter-bootstrap/4.5.0/js/bootstrap.min.js"
integrity="sha384-OgVRvuATP1z7JjHLkuOU7Xw704+h835Lr+6QL9UvYjZE3Ipu6Tp75j7Bh/kR0JKI"
crossorigin="anonymous" defer></script>
<script src="js/dark.js" defer></script>
<script src="js/storepub.js" defer></script>
<script src="js/storepri.js" defer></script>
<script src="js/config.js" defer></script>
<script src="js/char_conv.js" defer></script>
<script src="js/loader.js" defer></script>
<script src="js/searchkey.js" defer></script>
<script src="js/blob.js" defer></script>
<script src="https://cdn.staticfile.org/clipboard.js/2.0.6/clipboard.min.js"
integrity="sha384-x6nRSkfSsKGBsvlLFHHNju+buS3zYUztVnTRz/0JKgOIk3ulS6bNce/vHOvYE2eY"
crossorigin="anonymous" defer></script>
</head>
<body class="container-fluid center">
<div class="loader"></div>
<script>
//搜索并导入公钥
async function importKey(keyid) {
$(".loader").fadeIn();
var pub = await searchById(keyid);
$(".loader").fadeOut();
if (typeof (pub) === "undefined") {
alert("没有在服务器上找到此公钥");
return
}
try {
var keydata = (await openpgp.key.readArmored(pub)).keys;
if (typeof (keydata[0]) === "undefined")
throw new Error("密钥已损坏");
} catch (e) {
alert("密钥读取错误！\n" + e);
return
}
var len = keydata.length;
for (var i = 0; i < len; ++i) { //如果有多个密钥，则拆开保存
try {
if (window.confirm("确认添加公钥?\n密钥信息:\n" + keydata[i].getUserIds().toString())) {
var name = window.prompt("要保存的别名：", keydata[i].getUserIds().toString());
if (name == null || name == "")
continue;
if (await PubSave(name, keydata[i].armor()))
alert("添加成功!");
}
} catch (e) {
alert("出现错误\n错误代码：" + e);
}
}
}
//解密和签名部分（文本文件）
async function decrypt(modal) { //如果modal为true，则已运行模态框
var enkeyids = new Array();
var signkeyids = new Array();
try {
var msgdata = (await openpgp.message.readArmored(document.getElementById("text").value));
} catch (e) {
alert("数据读取出错，请检查密文是否粘贴完整");
throw new Error(e);
}
//读取所有加密的公钥id
for (var i = 0; i < msgdata.getEncryptionKeyIds().length; ++i)
enkeyids[i] = msgdata.getEncryptionKeyIds()[i].toHex();
//已加密的信息签名需要解密后才能验证
if (msgdata.getEncryptionKeyIds().length === 0) {
//读取所有签名的私钥id
for (var i = 0; i < msgdata.getSigningKeyIds().length; ++i)
signkeyids[i] = msgdata.getSigningKeyIds()[i].toHex();
var pubid = await PubSearchId(signkeyids); //第一个找到的已知公钥id
}
var priid = await PriSearchId(enkeyids); //第一个找到的已知私钥id
if (priid !== -1) {
//文本被加密
const privateKeyArmored = `${PriRead(priid)}`; // 用作解密的私钥
var keyname = PriReadName(priid);
const { keys: [privateKey] } = await openpgp.key.readArmored(privateKeyArmored);
if (!privateKey.isDecrypted())
try {
if (modal !== true) { //如果没有运行模态框，则运行
document.getElementById("Modal_title").innerHTML = "请输入密钥：" + char_conv(keyname) + "的密码";
$("#Modal_password").modal("show");
return
}
const passphrase = `${document.getElementById("keypassword").value}`; // 私钥密码
await privateKey.decrypt(passphrase);
} catch (e) {
window.alert("私钥密码错误");
return
}
try {
var decrypted = await openpgp.decrypt({
message: msgdata, // 要解密的信息
privateKeys: [privateKey] //解密用的私钥
});
//判断是否有签名
if (decrypted.signatures.length !== 0) {
for (var i = 0; i < decrypted.signatures.length; ++i)
signkeyids[i] = decrypted.signatures[i].keyid.toHex();
pubid = await PubSearchId(signkeyids); //第一个找到的已知公钥id
if (pubid !== -1) {
var pub = (await openpgp.key.readArmored(PubRead(pubid))).keys;
//这是为了解决在某种情况下，GPG使用ECC加密和签名，签名验证失败的问题(疑似换行符问题)
decrypted = await openpgp.decrypt({
//上面解密的时候会修改msgdata，所以不得不重新读一遍
message: (await openpgp.message.readArmored(document.getElementById("text").value)),
privateKeys: [privateKey],
publicKeys: pub
});
var valid = false;
for (var i = 0; i < decrypted.signatures.length; ++i) {
valid = decrypted.signatures[i].valid;
if (valid)
break;
}
if (valid) {
document.getElementById("signmsg").innerHTML = "签名验证成功，信息未被篡改，由" + char_conv(PubReadName(pubid)) + "签署";
$("#signmsg").show("slow");
} else {
$("#signmsg").hide();
alert("签名验证失败\n信息被篡改");
}
} else {
$("#signmsg").hide();
alert("签名未验证\n没有找到已知的公钥\n所需公钥id有：" + signkeyids);
}
}
document.getElementById("output").value = decrypted.data;
} catch (e) {
window.alert("解密错误\n错误代码:" + e);
return
}
await openpgp.destroyWorker();
$("#output").show("slow");
$("#copy").show("slow");
} else if (msgdata.getEncryptionKeyIds().length !== 0) {
alert("错误：没有找到解密的私钥.\n请导入私钥.\n所需私钥id有：" + enkeyids);
return
} else if (msgdata.getEncryptionKeyIds().length === 0 && msgdata.getSigningKeyIds().length !== 0) { //未加密，仅进行了签名
if (pubid != -1) {
const publicKeyArmored = `${PubRead(pubid)}`;
try {
//判断是一般签名还是明文签名，这是一个临时解决方案
if (msgdata.packets[0].packets.length === 0)
msgdata = await openpgp.cleartext.readArmored(document.getElementById("text").value); //如果是明文签名，则使用这个读取
const verified = await openpgp.verify({
message: msgdata, // parse armored message
publicKeys: (await openpgp.key.readArmored(publicKeyArmored)).keys // for verification
});
const { valid } = verified.signatures[0];
if (valid) {
document.getElementById("signmsg").innerHTML = "签名验证成功，信息未被篡改，由" + char_conv(PubReadName(pubid)) + "签署";
$("#signmsg").show("slow");
} else {
$("#signmsg").hide();
alert("签名验证失败\n信息被篡改");
}
} catch (e) {
window.alert("签名验证错误\n错误代码:" + e);
return
}
await openpgp.destroyWorker();
} else {
alert("错误：没有找到验证签名的公钥。\n请导入公钥。\n所需公钥id有：" + signkeyids);
if (window.confirm("是否在服务器上搜索并导入此公钥？"))
await importKey(signkeyids);
return
}
} else if (msgdata.getEncryptionKeyIds().length === 0 && msgdata.getSigningKeyIds().length === 0) { //使用密码加密
if (modal !== true) { //如果没有运行模态框，则运行
document.getElementById("Modal_title").innerHTML = "请输入密码";
$("#Modal_password").modal("show");
return
}
var password = [document.getElementById("keypassword").value];
try {
const { data: decrypted } = await openpgp.decrypt({
message: msgdata, // input as Message object
passwords: password
});
document.getElementById("output").value = decrypted;
} catch (e) {
if (e == "Error: Error decrypting message: Session key decryption failed.")
window.alert("密码错误");
else if (e == "Error: Error decrypting message: Modification detected.")
window.alert("密码错误或密文被篡改");
else
window.alert("解密错误\n错误代码:" + e);
return
}
await openpgp.destroyWorker();
$("#output").show("slow");
$("#copy").show("slow");
} else {
alert("未知错误");
return
}
}
//解密和签名部分（二进制文件）
async function decrypt_bin(modal) { //如果modal为true，则已运行模态框
var enkeyids = new Array();
var signkeyids = new Array();
try {
var msgdata = (await openpgp.message.readArmored(document.getElementById("text").value));
} catch (e) {
alert("数据读取出错，请检查密文是否粘贴完整");
throw new Error(e);
}
//读取所有加密的公钥id
for (var i = 0; i < msgdata.getEncryptionKeyIds().length; ++i)
enkeyids[i] = msgdata.getEncryptionKeyIds()[i].toHex();
//已加密的信息签名需要解密后才能验证
if (msgdata.getEncryptionKeyIds().length === 0) {
//读取所有签名的私钥id
for (var i = 0; i < msgdata.getSigningKeyIds().length; ++i)
signkeyids[i] = msgdata.getSigningKeyIds()[i].toHex();
var pubid = await PubSearchId(signkeyids); //第一个找到的已知公钥id
}
var priid = await PriSearchId(enkeyids); //第一个找到的已知私钥id
if (priid !== -1) {
//被加密
const privateKeyArmored = `${PriRead(priid)}`; // 用作解密的私钥
var keyname = PriReadName(priid);
const { keys: [privateKey] } = await openpgp.key.readArmored(privateKeyArmored);
if (!privateKey.isDecrypted())
try {
if (modal !== true) { //如果没有运行模态框，则运行
document.getElementById("Modal_title").innerHTML = "请输入密钥：" + char_conv(keyname) + "的密码";
document.getElementById("Modal_btn").onclick = Function("decrypt_bin(true)");
$("#Modal_password").modal("show");
return
}
const passphrase = `${document.getElementById("keypassword").value}`; // 私钥密码
await privateKey.decrypt(passphrase);
} catch (e) {
window.alert("私钥密码错误");
return
}
try {
var decrypted = await openpgp.decrypt({
message: msgdata, // 要解密的信息
privateKeys: [privateKey], //解密用的私钥
format: 'binary'
});
//判断是否有签名
if (decrypted.signatures.length !== 0) {
for (var i = 0; i < decrypted.signatures.length; ++i)
signkeyids[i] = decrypted.signatures[i].keyid.toHex();
pubid = await PubSearchId(signkeyids); //第一个找到的已知公钥id
if (pubid !== -1) {
var pub = (await openpgp.key.readArmored(PubRead(pubid))).keys;
//这是为了解决在某种情况下，GPG使用ECC加密和签名，签名验证失败的问题(疑似换行符问题)
const decrypted = await openpgp.decrypt({
//上面解密的时候会修改msgdata，所以不得不重新读一遍
message: (await openpgp.message.readArmored(document.getElementById("text").value)),
privateKeys: [privateKey],
publicKeys: pub,
format: 'binary'
});
var valid = false;
for (var i = 0; i < decrypted.signatures.length; ++i) {
valid = decrypted.signatures[i].valid;
if (valid)
break;
}
if (valid) {
document.getElementById("signmsg").innerHTML = "签名验证成功，信息未被篡改，由" + char_conv(PubReadName(pubid)) + "签署";
$("#signmsg").show("slow");
} else {
$("#signmsg").hide();
alert("签名验证失败\n信息被篡改");
}
} else {
$("#signmsg").hide();
alert("签名未验证\n没有找到已知的公钥\n所需公钥id有：" + signkeyids);
}
}
download_bin(decrypted.data, decrypted.filename);
} catch (e) {
window.alert("解密错误\n错误代码:" + e);
return
}
await openpgp.destroyWorker();
} else if (msgdata.getEncryptionKeyIds().length !== 0) {
alert("错误：没有找到解密的私钥.\n请导入私钥.\n所需私钥id有：" + enkeyids);
return
} else if (msgdata.getEncryptionKeyIds().length === 0 && msgdata.getSigningKeyIds().length === 0) { //使用密码加密
if (modal !== true) { //如果没有运行模态框，则运行
document.getElementById("Modal_title").innerHTML = "请输入密码";
document.getElementById("Modal_btn").onclick = Function("decrypt_bin(true)");
$("#Modal_password").modal("show");
return
}
var password = [document.getElementById("keypassword").value];
try {
const decrypted = await openpgp.decrypt({
message: msgdata, // input as Message object
passwords: password,
format: 'binary'
});
download_bin(decrypted.data, decrypted.filename);
} catch (e) {
if (e == "Error: Error decrypting message: Session key decryption failed.")
window.alert("密码错误");
else if (e == "Error: Error decrypting message: Modification detected.")
window.alert("密码错误或密文被篡改");
else
window.alert("解密错误\n错误代码:" + e);
return
}
await openpgp.destroyWorker();
} else {
alert("未知错误");
return
}
}
function download_bin(data, filename) {
$("#download").show("slow");
var url = Uint8Array2blobUrl(data);
document.getElementById("show_file").href = url;
document.getElementById("download_file").href = url;
document.getElementById("download_file").download = filename;
}
function clean_bin() {
var url = document.getElementById("download_file").href;
if (url != '') {
window.URL.revokeObjectURL(url);
document.getElementById("show_file").href = '';
document.getElementById("download_file").href = '';
document.getElementById("download_file").download = '';
}
$("#download").hide("slow");
}
</script>
<script>
//元素显示和隐藏部分
$(function () {
$("#output").hide();
$("#signmsg").hide();
$("#copy").hide();
$("#download").hide("slow");
});
</script>
<script>
//清空和隐藏文本框
function cleanall() {
if (window.confirm("确认清空文本框？")) {
document.getElementById("text").value = '';
document.getElementById("output").value = ''
clean_bin();
$("#output").hide();
$("#signmsg").hide();
$("#copy").hide();
}
}
</script>
<script>
//复制部分的代码
$(function () {
var clipboard = new ClipboardJS('#copy');
clipboard.on('success', function (e) {
e.clearSelection();
document.getElementById("copy").innerHTML = "已复制";
setTimeout(function () { document.getElementById("copy").innerHTML = "复制输出"; }, 2000);
});
clipboard.on('error', function (e) {
alert('复制失败，您的浏览器不支持！');
});
});
</script>
<h1>解密</h1>
<textarea id="text" rows="10" class="textarea-inherit" placeholder="请粘贴密文或签名"
autofocus="autofocus"></textarea><br>
<div class="row mx-auto" style="width: 95%;">
<button type="button" onclick="decrypt(false)" class="col btn btn-primary">解密或验证签名（文本）</button>
<button type="button" onclick="decrypt_bin(false)" class="col btn btn-primary">解密或验证签名（二进制）</button>
<button data-clipboard-target="#output" id="copy" class="col btn btn-primary">复制明文</button>
<button type="button" class="btn btn-danger" onclick="cleanall()">清空文本框</button><br>
<a type="button" class="btn btn-light col-sm-3" href="encrypt.html">跳转到加密</a><br>
<a type="button" class="btn btn-light col-sm-3" href="encrypt_password.html">跳转到使用密码加密</a><br>
</div>
<div class="alert alert-success alert-dismissible mx-auto" id="signmsg" style="width: 95%;"></div><br>
<div id="download" class="row mx-auto" style="width: 95%;">
<a type="button" class="btn btn-primary col-sm-3 offset-sm-3" href="" id="show_file">查看文件</a>
<a type="button" class="btn btn-primary col-sm-3" href="" id="download_file">下载文件</a>
</div>
<textarea id="output" rows="20" class="textarea-inherit" readonly></textarea>
<!-- 用于输入密码的模态框 -->
<div class="modal fade" id="Modal_password">
<div class="modal-dialog">
<div class="modal-content">
<!-- 模态框头部 -->
<div class="modal-header">
<h4 class="modal-title" id="Modal_title"></h4>
<button type="button" class="close" data-dismiss="modal">×</button>
</div>
<!-- 模态框主体 -->
<div class="modal-body">
<form onsubmit="return false">
<input type="password" class="input-inherit" id="keypassword">
</form>
</div>
<!-- 模态框底部 -->
<div class="modal-footer">
<button type="button" class="btn btn-secondary" data-dismiss="modal">取消</button>
<button type="button" class="btn btn-primary" data-dismiss="modal" id="Modal_btn"
onclick="decrypt(true)">确认</button>
</div>
</div>
</div>
</div>
</body>
</html>