cryptionHLB/index.html at main · LiaoYK001/cryptionHLB · GitHub

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<!DOCTYPE html>
<html>
<head>
    <title>异或操作编码解码</title>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <script>
        function strlen(str) {
            return str.length;
        }

        function decrypt(str, key) {
            const len = strlen(str);
            let decrypt = '';
            for (let i = 0; i < len; i++) {
                const encryptedChar = str.charCodeAt(i) ^ key.charCodeAt(i % strlen(key));
                decrypt += String.fromCharCode(encryptedChar);
            }
            return decrypt;
        }

        function encrypt(str, key) {
            const len = strlen(str);
            let first_encrypt = '';
            let first_encrypt_2 = '';
            let second_encrypt = '';
            for (let i = 0; i < len; i++) {
                let encryptedChar = str.charCodeAt(i) ^ key.charCodeAt(i % strlen(key));
                let encryptedChar2 = encryptedChar;
                if (encryptedChar2 < 32 || encryptedChar2 > 126) {
                encryptedChar2 = 63;
                }
                first_encrypt += String.fromCharCode(encryptedChar);
                first_encrypt_2 += String.fromCharCode(encryptedChar2);
            }
            second_encrypt = decrypt(first_encrypt, key);
            return [first_encrypt_2, second_encrypt];
        }

        function encryptAndDecrypt() {
            const plaintext = document.getElementById("plaintext").value;
            const key = document.getElementById("key").value;
            const result = encrypt(plaintext, key);
            document.getElementById("first_encrypt").innerHTML = result[0];
            document.getElementById("second_encrypt").innerHTML = result[1];
        }
    </script>
</head>
<body>
    <h1>异或XOR编码解码（题.8 信息加密）</h1>
    <p><span style="font-size: 18px; color: rgb(230, 46, 46);">C语言高级程序语言设计 by hyz lyk bz</span></p>
    <p><span style="font-size: 20px; color: rgb(33, 29, 243);">
        请输入明文和密钥
    </span></p>
    <label for="plaintext">明文（不超过200字符）:</label>
    <textarea id="plaintext" rows="4" cols="50" style="width: 425px; height: 127px;"></textarea><br><br>
    <label for="key">密钥Key（不超过20字符）:</label>
    <input type="text" id="key" name="key"><br><br>
    <button onclick="encryptAndDecrypt()"
    style="font-size: 29px; color: red;">开始异或</button>
    <br><br>
    <p style="font-weight: bold;">结果</p><br>
    <label for="first_encrypt">第一次异或:</label>
    <p id="first_encrypt"></p>
    <br>
    <label for="second_encrypt">第二次异或:</label>
    <p id="second_encrypt"></p>
</body>
</html>