Esempio n. 1
0
        public override void SetParameter(Octets param)
        {
            Octets k_ipad = new Octets(64);
            int keylen = param.size();

            if (keylen > 64)
            {
                Octets key = MD5Hash.Digest(param);
                k_ipad.replace(key);
                k_opad.replace(key);
                keylen = key.size();
            }
            else
            {
                k_ipad.replace(param);
                k_opad.replace(param);
            }

            int i = 0;
            for (; i < keylen; i++)
            {
                k_ipad.setByte(i, (byte)(k_ipad.getByte(i) ^ 0x36));
                k_opad.setByte(i, (byte)(k_opad.getByte(i) ^ 0x5c));
            }
            for (; i < 64; i++)
            {
                k_ipad.setByte(i, (byte)0x36);
                k_opad.setByte(i, (byte)0x5c);
            }
            k_ipad.resize(64);
            k_opad.resize(64);            
            md5hash.Update(k_ipad);
        }
Esempio n. 2
0
 public override Octets Update(Octets o)
 {
     int len = o.size();
     for (int i = 0; i < len; i++)
     {
         index2 += perm[(++index1) & 0xff];
         byte k = perm[index1 & 0xff]; perm[index1 & 0xff] = perm[index2 & 0xff]; perm[index2 & 0xff] = k;
         byte j = (byte)(perm[index1 & 0xff] + perm[index2 & 0xff]);
         o.setByte(i, (byte)(o.getByte(i) ^ perm[j & 0xff]));
     }
     return o;
 }
Esempio n. 3
0
 public override void SetParameter(Octets o)
 {
     int keylen = o.size();
     byte j = 0;
     for (int i = 0; i < 256; i++) perm[i] = (byte)i;
     for (int i = 0; i < 256; i++)
     {
         j += perm[i];
         j += o.getByte(i % keylen);
         byte k; k = perm[i]; perm[i] = perm[j & 0xff]; perm[j & 0xff] = k;
     }
     index1 = index2 = 0;
 }