Cifrado Vernam

1// Cifrado Vernam (One-Time Pad) - TypeScript
2export function vernamEncrypt(plaintext: string, key: string): string {
3  let ciphertext = ""
4
5  for (let i = 0; i < plaintext.length; i++) {
6    // Obtenemos los caracteres
7    const plainChar = plaintext[i]
8    const keyChar = key[i % key.length]
9    // Los transformamos a ASCII
10    const plainBinary = plainChar.charCodeAt(0)
11    const keyBinary = keyChar.charCodeAt(0)
12    // Le aplicamos XOR
13    let resultBinary = plainBinary ^ keyBinary
14    // Lo convertimos a caracter
15    ciphertext += String.fromCharCode(resultBinary)
16  }
17
18  return ciphertext 
19}
20
21// --- Ejemplo de uso ---
22const plaintext = "HELLO"
23const key       = "XMCKL"
24const encrypted = vernamEncrypt(plaintext, key)
25const hex       = toHex(encrypted)
26const decrypted = vernamDecrypt(encrypted, key)
27
28console.log("Texto plano:", plaintext)
29console.log("Clave:      ", key)
30console.log("Cifrado hex:", hex)
31console.log("Descifrado: ", decrypted)