Ejemplo n.º 1
0
        public static byte[] WhatsappEncrypt(byte[] key, byte[] data, bool appendHash)
        {
            if (encryptionOutgoing == null)
            {
                encryptionOutgoing = new RC4(key, 256);
            }
            HMACSHA1 h = new HMACSHA1(key);

            byte[] buff = new byte[data.Length];
            Buffer.BlockCopy(data, 0, buff, 0, data.Length);

            encryptionOutgoing.Cipher(buff);
            byte[] hashByte = h.ComputeHash(buff);
            byte[] response = new byte[4 + buff.Length];
            if (appendHash)
            {
                Buffer.BlockCopy(buff, 0, response, 0, buff.Length);
                Buffer.BlockCopy(hashByte, 0, response, buff.Length, 4);
            }
            else
            {
                Buffer.BlockCopy(hashByte, 0, response, 0, 4);
                Buffer.BlockCopy(buff, 0, response, 4, buff.Length);
            }

            return(response);
        }
Ejemplo n.º 2
0
 public static byte[] WhatsappDecrypt(byte[] key, byte[] data)
 {
     if (encryptionIncoming == null)
     {
         encryptionIncoming = new RC4(key, 256);
     }
     byte[] buff = new byte[data.Length];
     Buffer.BlockCopy(data, 0, buff, 0, data.Length);
     encryptionIncoming.Cipher(buff);
     return(buff);
 }
Ejemplo n.º 3
0
 public KeyStream(byte[] key, byte[] macKey)
 {
     this.rc4 = new RC4(key, 768);
     this.mac = new HMACSHA1(macKey);
 }