2fa generator

2fa-generator.markdown

2fa generator

A Pen by Cloud Dark on CodePen.

License.

index.html

  <div class="container">
    <h2>TOTP Generator & QR Code</h2>

    <input type="text" id="secretInput" placeholder="Enter Base32 Secret Token" autocomplete="off" />

    <div class="btn-group">
      <button id="btnGenerateQR">Generate QR Code</button>
      <button id="btnGenerateToken">Generate Token</button>
      <button id="btnCopyToken">Copy Token</button>
    </div>

    <p id="code">Waiting...</p>

    <canvas id="qr"></canvas>

    <input type="text" id="userCodeInput" placeholder="Enter Code to Validate" autocomplete="off"/>
    <button id="btnValidateCode">Validate Code</button>

    <p id="validationResult"></p>
  </div>

script.js

 let totp = null;

    const secretInput = document.getElementById('secretInput');
    const codeDisplay = document.getElementById('code');
    const qrCanvas = document.getElementById('qr');
    const userCodeInput = document.getElementById('userCodeInput');
    const validationResult = document.getElementById('validationResult');

    document.getElementById('btnGenerateToken').addEventListener('click', () => {
      const secret = secretInput.value.trim();
      if (!secret) return alert('Please enter a Base32 secret token!');

      try {
        totp = new OTPAuth.TOTP({
          issuer: 'MyApp',
          label: '[email protected]',
          algorithm: 'SHA1',
          digits: 6,
          period: 30,
          secret: OTPAuth.Secret.fromBase32(secret),
        });
      } catch (e) {
        alert(e);
        return;
      }

      const token = totp.generate();
      codeDisplay.textContent = token;
      validationResult.textContent = '';

      // Trigger pulse animation
      codeDisplay.classList.remove('pulse');
      void codeDisplay.offsetWidth; // reflow to restart animation
      codeDisplay.classList.add('pulse');
    });

    document.getElementById('btnGenerateQR').addEventListener('click', () => {
      const secret = secretInput.value.trim();
      if (!secret) return alert('Please enter a Base32 secret token!');

      try {
        const tempTotp = new OTPAuth.TOTP({
          issuer: 'MyApp',
          label: '[email protected]',
          secret: OTPAuth.Secret.fromBase32(secret),
        });
        const uri = tempTotp.toString();

        QRCode.toCanvas(qrCanvas, uri, { width: 200 }, (error) => {
          if (error) {
            alert('Failed to generate QR code.');
            console.error(error);
          }
        });
      } catch (e) {
        alert('Invalid secret format.');
      }
    });

    document.getElementById('btnCopyToken').addEventListener('click', () => {
      const code = codeDisplay.textContent;
      if (!code || code === 'Waiting...') return alert('No token to copy!');

      navigator.clipboard.writeText(code)
        .then(() => alert('Token copied to clipboard!'))
        .catch(() => alert('Failed to copy token.'));
    });

    document.getElementById('btnValidateCode').addEventListener('click', () => {
      if (!totp) return alert('Generate the token first to enable validation.');

      const inputCode = userCodeInput.value.trim();
      if (!inputCode) return alert('Please enter a code to validate.');

      const delta = totp.validate({ token: inputCode, window: 1 });
      if (delta !== null) {
        validationResult.textContent = '✅ Code is valid!';
        validationResult.style.color = 'green';
      } else {
        validationResult.textContent = '❌ Code is invalid!';
        validationResult.style.color = 'red';
      }

      // Trigger blink animation on validation result
      validationResult.classList.remove('blink');
      void validationResult.offsetWidth; // reflow
      validationResult.classList.add('blink');
    });

scripts

<script src="https://cdn.jsdelivr.net/npm/otpauth/dist/otpauth.umd.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/qrcode/build/qrcode.min.js"></script>

style.css

/* Reset margin/padding dan atur box-sizing */
*,
*::before,
*::after {
  box-sizing: border-box;
}
body {
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  background: linear-gradient(135deg, #1d2b64, #f8cdda);
  color: #222;
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 30px;
  margin: 0;
}




.container {
  background: white;
  border-radius: 16px;
  box-shadow: 0 8px 24px rgba(29, 43, 100, 0.3);
  padding: 30px 40px;
  max-width: 600px;
  width: 100%;
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: auto auto auto auto;
  gap: 20px 30px;
  align-items: center;

  /* Animasi fade-in */
  opacity: 0;
  transform: translateY(20px);
  animation: fadeInUp 0.8s ease forwards;
}
@keyframes fadeInUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}
h2 {
  grid-column: 1 / -1;
  text-align: center;
  margin: 0 0 10px;
  font-weight: 700;
  color: #1d2b64;
  letter-spacing: 1.2px;
}
input[type="text"] {
  font-size: 1rem;
  padding: 12px 15px;
  border-radius: 8px;
  border: 1.5px solid #ccc;
  outline: none;
  width: 100%;
  transition: border-color 0.3s;
  text-align: center;
}
input[type="text"]:focus {
  border-color: #007bff;
  box-shadow: 0 0 6px rgba(0, 123, 255, 0.4);
}
/* Buttons container spanning two columns */
.btn-group {
  grid-column: 1 / -1;
  display: flex;
  justify-content: center;
  gap: 15px;
  flex-wrap: wrap;
}
button {
  cursor: pointer;
  background-color: #007bff;
  color: white;
  border: none;
  border-radius: 8px;
  padding: 12px 22px;
  font-size: 1rem;
  font-weight: 600;
  transition: background-color 0.3s, box-shadow 0.3s, transform 0.2s;
  flex: 1 1 130px;
  max-width: 180px;
  box-shadow: 0 4px 8px rgba(0, 123, 255, 0.3);
}
button:hover {
  background-color: #0056b3;
  box-shadow: 0 6px 15px rgba(0, 86, 179, 0.5);
  transform: scale(1.05);
}
#code {
  grid-column: 1 / -1;
  font-size: 3rem;
  background: #f1f3f6;
  color: #333;
  border-radius: 16px;
  padding: 20px 0;
  user-select: all;
  letter-spacing: 10px;
  text-align: center;
  box-shadow: inset 0 0 8px #ddd;
  margin: 0;

  /* Animasi pulse */
}
#code.pulse {
  animation: pulse 1.2s ease-in-out;
}
@keyframes pulse {
  0%,
  100% {
    box-shadow: 0 0 8px 3px rgba(0, 123, 255, 0.5);
  }
  50% {
    box-shadow: 0 0 12px 6px rgba(0, 123, 255, 0.9);
  }
}
#qr {
  grid-column: 1 / 2;
  justify-self: center;
  border-radius: 16px;
  background: white;
  box-shadow: 0 6px 20px rgba(29, 43, 100, 0.15);
  width: 200px;
  height: 200px;
}
#userCodeInput {
  grid-column: 2 / 3;
  justify-self: stretch;
}
#btnValidateCode {
  grid-column: 2 / 3;
  justify-self: center;
  max-width: 180px;
}
#validationResult {
  grid-column: 1 / -1;
  text-align: center;
  font-weight: 700;
  font-size: 1.3rem;
  min-height: 1.5rem;
  margin-top: 10px;
  user-select: none;
}
#validationResult.blink {
  animation: blink 1s ease-in-out 2;
}
@keyframes blink {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.4;
  }
}

/* Responsive for smaller screens */
@media (max-width: 480px) {
  .container {
    grid-template-columns: 1fr;
    grid-template-rows: auto auto auto auto auto auto auto;
  }
  #qr,
  #userCodeInput,
  #btnValidateCode {
    grid-column: 1 / 2 !important;
    justify-self: center !important;
    width: 200px;
    max-width: 100%;
  }
  .btn-group {
    flex-direction: column;
  }
  button {
    max-width: 100%;
    flex: none;
  }
}