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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link href="https://cdn.jsdelivr.net/npm/[email protected]/dist/css/bootstrap.min.css" rel="stylesheet"
integrity="sha384-rbsA2VBKQhggwzxH7pPCaAqO46MgnOM80zW1RWuH61DGLwZJEdK2Kadq2F9CUG65" crossorigin="anonymous">
<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/js/bootstrap.bundle.min.js"
integrity="sha384-kenU1KFdBIe4zVF0s0G1M5b4hcpxyD9F7jL+jjXkk+Q2h455rYXK/7HAuoJl+0I4"
crossorigin="anonymous"></script>
<title>SHA256 with RSA</title>
</head>
<body class="container-md">
<div class="row my-4">
<div class="col-md-12">
<h1>SHA256 with RSA</h1>
</div>
</div>
<div class="row">
<div class="col-md-3">
<ul class="navbar-nav flex-grow-1 my-4" style="position: fixed;">
<li style="margin-bottom: 0.5rem;">
滚动到
</li>
<li style="margin-bottom: 0.5rem;">
<a href="#generate" style="text-decoration: none;">生成</a>
</li>
<li style="margin-bottom: 0.5rem;">
<a href="#sign" style="text-decoration: none;">签名</a>
</li>
<li style="margin-bottom: 0.5rem;">
<a href="#verify" style="text-decoration: none;">验证签名</a>
</li>
<li style="margin-bottom: 0.5rem;">
<a href="#encrypt" style="text-decoration: none;">加密</a>
</li>
<li style="margin-bottom: 0.5rem;">
<a href="#decrypt" style="text-decoration: none;">解密</a>
</li>
</ul>
</div>
<div class="col-md-9">
<div class="card my-4">
<div class="card-header" id="generate">生成</div>
<div class="card-body">
<p><i>生成一对新的 PEM 格式的 RSA 钥匙。</i></p>
<div>
<label>
复杂度
<input type="number" id="generate-complexity" value="2048" class="form-control" />
</label>
</div>
<table class="table">
<thead>
<tr>
<th>私钥</th>
<th>公钥</th>
</tr>
</thead>
<tbody>
<tr>
<td><a id="privateKeyLink" style="display: none; text-decoration: none;">下载</a></td>
<td><a id="publicKeyLink" style="display: none; text-decoration: none;">下载</a></td>
</tr>
</tbody>
</table>
<p id="generate-error" style="color: red;"></p>
</div>
<div class="card-footer">
<button class="btn btn-success" onclick="generate()">
开始
</button>
<button class="btn disabled" style="display: none; color: green;" id="update_generate_msg">
已更新
</button>
</div>
</div>
<div class="card my-4">
<div class="card-header" id="sign">签名</div>
<div class="card-body">
<p><i>用私钥签署一条消息，证明消息由你创建。</i></p>
<div>
<label>
私钥
<input type="file" id="sign-private-key" class="form-control" />
</label>
</div>
<label for="sign-content">消息</label>
<textarea rows="5" id="sign-content" class="form-control"></textarea>
<label for="sign-signature">签名</label>
<textarea rows="3" id="sign-signature" class="form-control" readonly disabled></textarea>
<p id="sign-error" style="color: red;"></p>
</div>
<div class="card-footer">
<button class="btn btn-success" onclick="sign()">
开始
</button>
<button class="btn disabled" style="display: none; color: green;" id="update_sign_msg">
已更新
</button>
</div>
</div>
<div class="card my-4">
<div class="card-header" id="verify">验证签名</div>
<div class="card-body">
<p><i>验证一条消息是否是（和下面的公钥配对的）私钥持有者创建的。</i></p>
<div>
<label>
公钥
<input type="file" id="verify-public-key" class="form-control" />
</label>
</div>
<label for="verify-content">消息</label>
<textarea rows="5" id="verify-content" class="form-control"
placeholder="Blank spaces and new lines at the end can lead to different result."></textarea>
<label for="verify-signature">签名</label>
<textarea rows="3" id="verify-signature" class="form-control"></textarea>
<p>Result: <span id="verify-result"></span></p>
<p id="verify-error" style="color: red;"></p>
</div>
<div class="card-footer">
<button class="btn btn-success" onclick="verify()">
开始
</button>
<button class="btn disabled" style="display: none; color: green;" id="update_verify_msg">
已更新
</button>
</div>
</div>
<div class="card my-4">
<div class="card-header" id="encrypt">加密</div>
<div class="card-body">
<p><i>加密一条消息，该消息只能被对应的私钥持有者解密。</i></p>
<div>
<label>
公钥
<input type="file" id="encrypt-public-key" class="form-control" />
</label>
</div>
<label for="encrypt-content">消息</label>
<textarea rows="5" id="encrypt-content" class="form-control"></textarea>
<label for="encrypt-result">加密内容</label>
<textarea rows="8" id="encrypt-result" class="form-control" readonly disabled></textarea>
<p id="encrypt-error" style="color: red;"></p>
</div>
<div class="card-footer">
<button class="btn btn-success" onclick="encrypt()">
开始
</button>
<button class="btn disabled" style="display: none; color: green;" id="update_encrypt_msg">
已更新
</button>
</div>
</div>
<div class="card my-4">
<div class="card-header" id="decrypt">解密</div>
<div class="card-body">
<p><i>解密被对应的公钥加密的消息。</i></p>
<div>
<label>
私钥
<input type="file" id="decrypt-private-key" class="form-control" />
</label>
</div>
<label for="decrypt-content">加密内容</label>
<textarea rows="8" id="decrypt-content" class="form-control" placeholder="按以下格式粘贴：
{
"encrypted_session_key": "...",
"nonce": "...",
"encrypted_message": "..."
}"></textarea>
<label for="decrypt-result">消息</label>
<textarea rows="5" id="decrypt-result" class="form-control" readonly disabled></textarea>
<p id="decrypt-error" style="color: red;"></p>
</div>
<div class="card-footer">
<button class="btn btn-success" onclick="decrypt()">
开始
</button>
<button class="btn disabled" style="display: none; color: green;" id="update_decrypt_msg">
已更新
</button>
</div>
</div>
</div>
</div>
<script>
function arrayBufferToBase64(buffer) {
let binary = "";
const bytes = new Uint8Array(buffer);
const len = bytes.byteLength;
for (let i = 0; i < len; i++) {
binary += String.fromCharCode(bytes[i]);
}
return btoa(binary);
}
function base64ToArrayBuffer(base64) {
const binaryString = atob(base64);
const len = binaryString.length;
const bytes = new Uint8Array(len);
for (let i = 0; i < len; i++) {
bytes[i] = binaryString.charCodeAt(i);
}
return bytes.buffer;
}
function createDownloadLink(keyBase64, fileName, linkId) {
const keyBlob = new Blob([keyBase64], { type: "application/octet-stream" });
const url = URL.createObjectURL(keyBlob);
const link = document.getElementById(linkId);
link.href = url;
link.download = fileName;
link.style.display = "inline"; // Make sure the link is visible
}
async function generate() {
const n = document.getElementById("generate-complexity").value;
const error = document.getElementById("generate-error");
error.innerText = "";
try {
const keyPair = await crypto.subtle.generateKey(
{
name: "RSASSA-PKCS1-v1_5",
modulusLength: n,
publicExponent: new Uint8Array([1, 0, 1]),
hash: "SHA-256",
},
true,
["sign", "verify"]
);
const privateKey = await crypto.subtle.exportKey("pkcs8", keyPair.privateKey);
const publicKey = await crypto.subtle.exportKey("spki", keyPair.publicKey);
const privateKeyBase64 = "-----BEGIN RSA PRIVATE KEY-----\n" + arrayBufferToBase64(privateKey) + "\n-----END RSA PRIVATE KEY-----";
const publicKeyBase64 = "-----BEGIN PUBLIC KEY-----\n" + arrayBufferToBase64(publicKey) + "\n-----BEGIN PUBLIC KEY-----";
createDownloadLink(privateKeyBase64, "private_key.txt", "privateKeyLink");
createDownloadLink(publicKeyBase64, "public_key.txt", "publicKeyLink");
} catch (e) {
error.innerText = e.toString();
return;
}
const msg = document.getElementById("update_generate_msg");
msg.style.display = "inline-block";
setTimeout(function () {
msg.style.display = "none";
}, 1000);
}
async function sign() {
const content = document.getElementById("sign-content").value;
const private_key_node = document.getElementById("sign-private-key");
const error = document.getElementById("sign-error");
error.innerText = "";
if (private_key_node.files.length === 0) {
error.innerText = "Private key should not be empty.";
return;
}
const reader = new FileReader();
try {
reader.readAsText(private_key_node.files[0]);
} catch (e) {
error.innerText = e.toString();
}
reader.onload = async function (e) {
try {
const private_key = e.target.result.toString();
const private_key_obj = await crypto.subtle.importKey(
"pkcs8",
base64ToArrayBuffer(private_key.replace(/(-----(BEGIN|END) RSA PRIVATE KEY-----|\n)/g, "")),
{
name: "RSASSA-PKCS1-v1_5",
hash: "SHA-256",
},
false,
["sign"]
);
const signature = await crypto.subtle.sign(
"RSASSA-PKCS1-v1_5", private_key_obj, new TextEncoder().encode(content));
document.getElementById("sign-signature").value = arrayBufferToBase64(signature);
} catch (e) {
error.innerText = e.toString();
}
const msg = document.getElementById("update_sign_msg");
msg.style.display = "inline-block";
setTimeout(function () {
msg.style.display = "none";
}, 1000);
};
}
async function verify() {
const error = document.getElementById("verify-error");
error.innerText = "";
const is_valid_node = document.getElementById("verify-result");
is_valid_node.innerText = "";
const public_key_node = document.getElementById("verify-public-key");
if (public_key_node.files.length === 0) {
error.innerText = "Public key should not be empty.";
return;
}
const reader = new FileReader();
try {
reader.readAsText(public_key_node.files[0]);
} catch (e) {
error.innerText = e.toString();
}
reader.onload = async function (e) {
try {
const public_key = e.target.result.toString();
const public_key_obj = await crypto.subtle.importKey(
"spki",
base64ToArrayBuffer(public_key.replace(/(-----(BEGIN|END) PUBLIC KEY-----|\n)/g, "")),
{
name: "RSASSA-PKCS1-v1_5",
hash: "SHA-256",
},
false,
["verify"]
);
const signature = document.getElementById("verify-signature").value;
const content = document.getElementById("verify-content").value;
const is_valid = await crypto.subtle.verify(
"RSASSA-PKCS1-v1_5", public_key_obj, base64ToArrayBuffer(signature),
new TextEncoder().encode(content)
);
if (is_valid) {
is_valid_node.style.color = "green";
is_valid_node.innerText = "VALID";
} else {
is_valid_node.style.color = "red";
is_valid_node.innerText = "INVALID";
}
} catch (e) {
error.innerText = e.toString();
}
};
const msg = document.getElementById("update_verify_msg");
msg.style.display = "inline-block";
setTimeout(function () {
msg.style.display = "none";
}, 1000);
}
async function encrypt() {
const public_key_node = document.getElementById("encrypt-public-key");
const error = document.getElementById("encrypt-error");
error.innerText = "";
const encrypted_result = document.getElementById("encrypt-result");
encrypted_result.innerHTML = "";
if (public_key_node.files.length === 0) {
error.innerText = "Public key should not be empty.";
return;
}
const reader = new FileReader();
try {
reader.readAsText(public_key_node.files[0]);
} catch (e) {
error.innerText = e.toString();
}
reader.onload = async function (e) {
try {
const public_key = e.target.result.toString();
const public_key_obj = await crypto.subtle.importKey(
"spki",
base64ToArrayBuffer(public_key.replace(/(-----(BEGIN|END) PUBLIC KEY-----|\n)/g, "")),
{
name: "RSA-OAEP",
hash: "SHA-256",
},
false,
["encrypt"]
);
const sessionKey = crypto.getRandomValues(new Uint8Array(32));
const encryptedSessionKey = await crypto.subtle.encrypt({ name: "RSA-OAEP" }, public_key_obj, sessionKey);
const content = document.getElementById("encrypt-content").value;
const aesKey = await crypto.subtle.importKey("raw", sessionKey, { name: "AES-GCM" }, false, ["encrypt"]);
const cipherAes = await crypto.subtle.encrypt(
{
name: "AES-GCM",
iv: sessionKey.slice(0, 12), // 12-byte nonce for AES-GCM
},
aesKey,
new TextEncoder().encode(content)
);
encrypted_result.innerHTML = JSON.stringify(
{
encrypted_session_key: arrayBufferToBase64(encryptedSessionKey),
nonce: arrayBufferToBase64(sessionKey.slice(0, 12)),
encrypted_message: arrayBufferToBase64(cipherAes),
},
null,
4
);
} catch (e) {
error.innerText = e.toString();
}
};
const msg = document.getElementById("update_encrypt_msg");
msg.style.display = "inline-block";
setTimeout(function () {
msg.style.display = "none";
}, 1000);
}
async function decrypt() {
const content = document.getElementById("decrypt-content").value;
const private_key_node = document.getElementById("decrypt-private-key");
const error = document.getElementById("decrypt-error");
error.innerText = "";
if (private_key_node.files.length === 0) {
error.innerText = "Private key should not be empty.";
return;
}
const reader = new FileReader();
try {
reader.readAsText(private_key_node.files[0]);
} catch (e) {
error.innerText = e.toString();
}
const message_node = document.getElementById("decrypt-result");
message_node.innerHTML = "";
reader.onload = async function (e) {
try {
const private_key = e.target.result.toString();
const private_key_obj = await crypto.subtle.importKey(
"pkcs8",
base64ToArrayBuffer(private_key.replace(/(-----(BEGIN|END) RSA PRIVATE KEY-----|\n)/g, "")),
{
name: "RSA-OAEP",
hash: "SHA-256",
},
false,
["decrypt"]
);
const parsedContent = JSON.parse(content);
const encryptedSessionKey = base64ToArrayBuffer(parsedContent.encrypted_session_key);
const sessionKey = await crypto.subtle.decrypt({ name: "RSA-OAEP" }, private_key_obj, encryptedSessionKey);
const cipherAes = await crypto.subtle.decrypt(
{
name: "AES-GCM",
iv: base64ToArrayBuffer(parsedContent.nonce),
},
await crypto.subtle.importKey("raw", sessionKey, { name: "AES-GCM" }, false, ["decrypt"]),
base64ToArrayBuffer(parsedContent.encrypted_message)
);
message_node.innerHTML = new TextDecoder().decode(cipherAes);
} catch (e) {
error.innerText = e.toString();
}
};
const msg = document.getElementById("update_decrypt_msg");
msg.style.display = "inline-block";
setTimeout(function () {
msg.style.display = "none";
}, 1000);
}
</script>
</body>
</html>