steganography/KTStegRich.html at main · akingry/steganography · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Kingry Tools: Steganography (Rich Text and Images Version)</title>
<style>
  body { font-family: Arial, sans-serif; margin: 20px; background: #f0f0f0; }
  h1 { text-align: center; }
  .container { display: flex; flex-wrap: wrap; justify-content: center; gap: 40px; }
  .section { background: #fff; padding: 20px; border-radius: 8px; box-shadow: 0 0 10px rgba(0,0,0,0.1); width: 360px; }
  .editor {
    width: 100%;
    min-height: 200px;
    max-height: 60vh; /* Prevent box from growing beyond viewport, enable scrolling */
    border: 1px solid #ccc;
    border-radius: 4px;
    padding: 8px;
    margin-top: 10px;
    overflow-y: auto;
    background: #fff;
  }
  .editor:empty:before {
    content: attr(data-placeholder);
    color: #888;
  }
  input, button { width: 100%; padding: 8px; margin-top: 8px; }
  canvas { display: none; }
  #byteInfo { margin-top: 5px; font-size: 14px; }
  img.preview { display: none; margin: 10px auto; max-width: 100%; border-radius: 4px; }
  .drop-zone {
    border: 2px dashed #888;
    border-radius: 6px;
    padding: 12px;
    text-align: center;
    color: #555;
    margin-top: 10px;
    cursor: pointer;
    transition: background-color 0.2s, border-color 0.2s;
  }
  .drop-zone.dragover {
    background-color: #cce5ff;
    border-color: #007bff;
  }
</style>
</head>
<body>
<h1>Kingry Tools: Steganography (Rich Text and Images Version)</h1>
<div class="container">

  <div class="section">
    <h2>Hide HTML</h2>
    <div class="drop-zone" id="dropZone">Drop cover image here or click to select</div>
    <input type="file" id="coverInput" accept="image/*" onchange="handleCoverImage()" style="display:none">
    <img id="sourcePreview" class="preview">
    <div id="hideEditor" class="editor" contenteditable="true" data-placeholder="Paste text or images here..."></div>
    <div id="byteInfo">Bytes: 0</div>
    <input type="password" id="hidePassword" placeholder="Password (optional)">
    <button id="hideButton" onclick="hideText()" disabled>Hide & Download</button>
  </div>

  <div class="section">
    <h2>Extract HTML</h2>
    <input type="file" id="stegoInput" accept="image/*" onchange="handleStegoImage()">
    <img id="stegoPreview" class="preview">
    <input type="password" id="extractPassword" placeholder="Password (if used)">
    <button id="extractButton" onclick="extractText()" disabled>Extract & View</button>
    <div id="extractEditor" class="editor" contenteditable="false"></div>
  </div>

</div>
<canvas id="canvas"></canvas>

<script src="https://cdn.jsdelivr.net/npm/lz-string@1.4.4/libs/lz-string.min.js"></script>
<script>
let maxBytes = 0;
const hideEditor = document.getElementById('hideEditor');
const extractEditor = document.getElementById('extractEditor');

// Handle paste of images and text
hideEditor.addEventListener('paste', e => {
  const items = (e.clipboardData || e.originalEvent.clipboardData).items;
  for (let item of items) {
    if (item.kind === 'file' && item.type.startsWith('image/')) {
      e.preventDefault();
      const blob = item.getAsFile();
      const reader = new FileReader();
      reader.onload = ev => {
        document.execCommand('insertImage', false, ev.target.result);
        updateByteInfo();
      };
      reader.readAsDataURL(blob);
    }
  }
});

// Track input for byte count
hideEditor.addEventListener('input', updateByteInfo);

// Cover image selection
const dropZone = document.getElementById('dropZone');
dropZone.addEventListener('click', () => document.getElementById('coverInput').click());
dropZone.addEventListener('dragover', e => { e.preventDefault(); dropZone.classList.add('dragover'); });
dropZone.addEventListener('dragleave', e => { e.preventDefault(); dropZone.classList.remove('dragover'); });
dropZone.addEventListener('drop', e => { e.preventDefault(); dropZone.classList.remove('dragover'); const file = e.dataTransfer.files[0]; if (file && file.type.startsWith('image/')) { document.getElementById('coverInput').files = e.dataTransfer.files; handleCoverImage(); }});

function handleCoverImage() {
  const file = document.getElementById('coverInput').files[0];
  if (!file) return;
  const reader = new FileReader();
  reader.onload = e => {
    const img = new Image();
    img.onload = () => {
      maxBytes = Math.floor((img.width * img.height * 3) / 8) - 4;
      maxBytes = Math.floor(maxBytes * 3 / 4);
      updateByteInfo();
    };
    img.src = e.target.result;
    const preview = document.getElementById('sourcePreview');
    preview.src = e.target.result;
    preview.style.display = 'block';
  };
  reader.readAsDataURL(file);
}

function handleStegoImage() {
  const file = document.getElementById('stegoInput').files[0];
  const preview = document.getElementById('stegoPreview');
  if (!file) {
    preview.style.display = 'none';
    document.getElementById('extractButton').disabled = true;
    return;
  }
  const reader = new FileReader();
  reader.onload = e => {
    preview.src = e.target.result;
    preview.style.display = 'block';
    document.getElementById('extractButton').disabled = false;
  };
  reader.readAsDataURL(file);
}

function updateByteInfo() {
  const raw = hideEditor.innerHTML;
  const comp = LZString.compressToUTF16(raw);
  const used = new TextEncoder().encode(comp).length;
  const info = document.getElementById('byteInfo');
  info.textContent = `Bytes: ${used} / ${maxBytes}`;
  info.style.color = used > maxBytes ? 'red' : 'black';
  document.getElementById('hideButton').disabled = !(used > 0 && used <= maxBytes && document.getElementById('coverInput').files.length > 0);
}

// Encryption helper
function xorEncryptDecrypt(data, key) {
  const keyBytes = new TextEncoder().encode(key);
  return data.map((b, i) => b ^ keyBytes[i % keyBytes.length]);
}
function intToBinArray(n, bits) { return Array.from({length: bits}, (_, i) => (n >> (bits - i - 1)) & 1); }
function binArrayToInt(arr) { return arr.reduce((acc, bit) => (acc << 1) | bit, 0); }

// Hide and embed
function hideText() {
  const file = document.getElementById('coverInput').files[0];
  const raw = hideEditor.innerHTML;
  const pwd = document.getElementById('hidePassword').value;
  if (!file || !raw) return alert('Select cover image & add content.');
  let msg = LZString.compressToUTF16(raw);
  const reader = new FileReader(); reader.onload = e => {
    const img = new Image(); img.onload = () => {
      const canvas = document.getElementById('canvas');
      canvas.width = img.width; canvas.height = img.height;
      const ctx = canvas.getContext('2d'); ctx.drawImage(img, 0, 0);
      let bytes = new TextEncoder().encode(msg);
      if (pwd) {
        const enc = xorEncryptDecrypt(bytes, pwd);
        let binStr = '';
        enc.forEach(b => binStr += String.fromCharCode(b));
        bytes = new TextEncoder().encode(btoa(binStr));
      }
      const pixels = ctx.getImageData(0,0, img.width, img.height).data;
      const bits = [...intToBinArray(bytes.length, 32)];
      bytes.forEach(b => bits.push(...intToBinArray(b, 8)));
      if (bits.length > pixels.length / 4 * 3) return alert('Payload too large.');
      let idx = 0;
      for (let i = 0; i < pixels.length; i += 4) {
        if (idx < bits.length) pixels[i]   = (pixels[i]   & ~1) | bits[idx++];
        if (idx < bits.length) pixels[i+1] = (pixels[i+1] & ~1) | bits[idx++];
        if (idx < bits.length) pixels[i+2] = (pixels[i+2] & ~1) | bits[idx++];
      }
      ctx.putImageData(new ImageData(pixels, img.width, img.height), 0, 0);
      setTimeout(() => {
        const a = document.createElement('a');
        a.download = 'stego_image.png';
        a.href = canvas.toDataURL();
        a.click();
      }, 50);
    };
    img.src = e.target.result;
  };
  reader.readAsDataURL(file);
}

// Extract and display
function extractText() {
  const file = document.getElementById('stegoInput').files[0];
  const pwd = document.getElementById('extractPassword').value;
  if (!file) return alert('Select a stego image.');
  const reader = new FileReader(); reader.onload = e => {
    const img = new Image(); img.onload = () => {
      const canvas = document.getElementById('canvas');
      canvas.width = img.width; canvas.height = img.height;
      const ctx = canvas.getContext('2d'); ctx.drawImage(img, 0, 0);
      const data = ctx.getImageData(0,0, img.width, img.height).data;
      const bits = [];
      for (let i = 0; i < data.length; i += 4) {
        bits.push(data[i] & 1, data[i+1] & 1, data[i+2] & 1);
      }
      const len = binArrayToInt(bits.slice(0, 32));
      const chunk = bits.slice(32, 32 + len * 8);
      const bytes = [];
      for (let i = 0; i < chunk.length; i += 8) {
        bytes.push(binArrayToInt(chunk.slice(i, i+8)));
      }
      let extracted = new Uint8Array(bytes);
      try {
        let str;
        if (pwd) {
          const binStr = atob(new TextDecoder().decode(extracted));
          const rawBytes = new Uint8Array([...binStr].map(ch => ch.charCodeAt(0)));
          str = new TextDecoder().decode(xorEncryptDecrypt(rawBytes, pwd));
        } else {
          str = new TextDecoder().decode(extracted);
        }
        const html = LZString.decompressFromUTF16(str);
        extractEditor.innerHTML = html;
      } catch (err) {
        alert('Failed to decode. Wrong password or corrupted image.');
      }
    };
    img.src = e.target.result;
  };
  reader.readAsDataURL(file);
}
</script>
</body>
</html>