C# Account File Enc/Dec

[The Cowboy 28]

        public byte[] DecryptAccount(byte[] AccountData)        {            byte[] buffer = new byte[404];            byte[] firstbytes = new byte[16];            Array.Copy(AccountData, firstbytes, 16);            Array.Resize(ref buffer, 16);            Array.Copy(firstbytes, buffer, 16);            System.Security.Cryptography.HMACSHA1 h = new System.Security.Cryptography.HMACSHA1(hmackey);            byte[] rckey = h.ComputeHash(buffer);            Array.Resize(ref rckey, 0x10);            byte[] decrypteddata = new byte[388];            Array.Resize(ref buffer, 388);            Array.Copy(AccountData, 0x10, buffer, 0, 388);            RC4(ref buffer, rckey);            Array.Copy(buffer, decrypteddata, 388);            return decrypteddata;        }        public byte[] EncryptAccount(byte[] AccountData)        {            byte[] buffer = new byte[404];            Array.Copy(AccountData, 0, buffer, 0x10, AccountData.Length);            System.Security.Cryptography.HMACSHA1 hs1 = new System.Security.Cryptography.HMACSHA1(hmackey);            byte[] firstbytes = new byte[16];            Array.Copy(hs1.ComputeHash(AccountData), firstbytes, 16);            Array.Copy(firstbytes, 0, buffer, 0, 16);            byte[] rckey = hs1.ComputeHash(firstbytes);            Array.Resize(ref rckey, 0x10);            byte[] buffertwo = new byte[388];            Array.Copy(buffer, 0x10, buffertwo, 0, 388);            RC4(ref buffertwo, rckey);            Array.Copy(buffertwo, 0, buffer, 0x10, buffertwo.Length);            return buffer;        }        public void RC4(ref Byte[] bytes, Byte[] key)        {            Byte[] s = new Byte[256];            Byte[] k = new Byte[256];            Byte temp;            int i, j;            for (i = 0; i < 256; i++)            {                s[i] = (Byte)i;                k[i] = key[i % key.GetLength(0)];            }            j = 0;            for (i = 0; i < 256; i++)            {                j = (j + s[i] + k[i]) % 256;                temp = s[i];                s[i] = s[j];                s[j] = temp;            }            i = j = 0;            for (int x = 0; x < bytes.GetLength(0); x++)            {                i = (i + 1) % 256;                j = (j + s[i]) % 256;                temp = s[i];                s[i] = s[j];                s[j] = temp;                int t = (s[i] + s[j]) % 256;                bytes[x] ^= s[t];            }        }

I wanted to share it to help other people and i'd like to improve my code so i shared it.

[Swizzy 2083]

http://www.sendspace.com/file/4gdqi3 <--- an old project of mine that i made for a friend, a little over a year ago... might help

[The Cowboy 28]

http://www.sendspace.com/file/4gdqi3 <--- an old project of mine that i made for a friend, a little over a year ago... might help

OMG! Perfect code.Gonna use this for my next app, thanks a lot !

[Swizzy 2083]

OMG! Perfect code.Gonna use this for my next app, thanks a lot !

My code for this project is REALLY bad... xD it's nowhere near clean or even optimized...

[The Cowboy 28]

My code for this project is REALLY bad... xD it's nowhere near clean or even optimized...

Well, since it is the best codding ive ever seen, i can think it is good.

[Swizzy 2083]

Well, since it is the best codding ive ever seen, i can think it is good.

Thanks if you want i can clean it up for ya, make it easier to read and optimize it...

[The Cowboy 28]

Thanks if you want i can clean it up for ya, make it easier to read and optimize it...

if I understand it that way, it would be a lesson for me

[Swizzy 2083]

if I understand it that way, it would be a lesson for me

http://www.sendspace.com/file/s90pp9 <--- there you go, much cleaner/better code i didn't change the RC4 implementation tho, your implementation of that is probably better (less code) but... i cba to verify that changes made to that actually work atm...