passInts[i] = (uint)reader.ReadInt32();
Quote:
Hello people,
Does someone know how to decrypt the password?
RC5 Layer gives me the following error:
The arithmetic operation resulted in an overflow.
On this line:
Thanks in advanced,Code:passInts[i] = (uint)reader.ReadInt32();
Jobdvh!
passInts[i] = reader.ReadUInt32();
passInts[i] = Convert.ToUInt32(reader.ReadUInt32());
temp2 = RightRotate(temp2 - _key[j * 2 + 6], temp1) ^ temp1;
public static string Decrypt(byte[] bytes)
{
BinaryReader reader = new BinaryReader(new MemoryStream(bytes, false));
uint[] passInts = new uint[4];
for (uint i = 0; i < 4; i++)
passInts[i] = Convert.ToUInt32(reader.ReadUInt32());
uint temp1, temp2;
for (int i = 1; i >= 0; i--)
{
temp1 = passInts[(i * 2) + 1];
temp2 = passInts[i * 2];
for (int j = 11; j >= 0; j--)
{
temp1 = RightRotate(temp1 - _key[j * 2 + 7], temp2) ^ temp2;
temp2 = RightRotate(temp2 - _key[j * 2 + 6], temp1) ^ temp1;
}
passInts[i * 2 + 1] = temp1 - _key[5];
passInts[i * 2] = temp2 - _key[4];
}
BinaryWriter writer = new BinaryWriter(new MemoryStream(bytes, true));
for (uint i = 0; i < 4; i++)
writer.Write((int)passInts[i]);
for (int i = 0; i < 16; i++)
if (bytes[i] == 0)
return Encoding.ASCII.GetString(bytes, 0, i);
return Encoding.ASCII.GetString(bytes);
}
The old password encryption is RC5...Quote:
Quote:
Does someone know how to decrypt the password?
RC5 Layer gives me the following error:
The arithmetic operation resulted in an overflow.
On this line:
Thanks in advanced,Code:passInts[i] = (uint)reader.ReadInt32();
Jobdvh!
Accoding to e*pvp you posted the second error within 2 hours of fixing the first one, you have NOT tryed very hard at ALL.Quote:
Now I get the same error on another line:
Heres my decrypt void:Code:temp2 = RightRotate(temp2 - _key[j * 2 + 6], temp1) ^ temp1;
Code:public static string Decrypt(byte[] bytes) { BinaryReader reader = new BinaryReader(new MemoryStream(bytes, false)); uint[] passInts = new uint[4]; for (uint i = 0; i < 4; i++) passInts[i] = Convert.ToUInt32(reader.ReadUInt32()); uint temp1, temp2; for (int i = 1; i >= 0; i--) { temp1 = passInts[(i * 2) + 1]; temp2 = passInts[i * 2]; for (int j = 11; j >= 0; j--) { temp1 = RightRotate(temp1 - _key[j * 2 + 7], temp2) ^ temp2; temp2 = RightRotate(temp2 - _key[j * 2 + 6], temp1) ^ temp1; } passInts[i * 2 + 1] = temp1 - _key[5]; passInts[i * 2] = temp2 - _key[4]; } BinaryWriter writer = new BinaryWriter(new MemoryStream(bytes, true)); for (uint i = 0; i < 4; i++) writer.Write((int)passInts[i]); for (int i = 0; i < 16; i++) if (bytes[i] == 0) return Encoding.ASCII.GetString(bytes, 0, i); return Encoding.ASCII.GetString(bytes); }
Really? Didn't know that. I only saw the word "RC5" appearing in relation to the password decryption after the new password encryption came along so figured that the old one didn't use it.Quote:
N.B. Maybe you can check my public implementation.
using System.Runtime.InteropServices;
public unsafe class PasswordCipher
{
private static uint[] _key = new uint[] {
0xebe854bc, 0xb04998f7, 0xfffaa88c, 0x96e854bb, 0xa9915556, 0x48e44110,
0x9f32308f, 0x27f41d3e, 0xcf4f3523, 0xeac3c6b4, 0xe9ea5e03, 0xe5974bba,
0x334d7692, 0x2c6bcf2e, 0xdc53b74, 0x995c92a6, 0x7e4f6d77, 0x1eb2b79f,
0x1d348d89, 0xed641354, 0x15e04a9d, 0x488da159, 0x647817d3, 0x8ca0bc20,
0x9264f7fe, 0x91e78c6c, 0x5c9a07fb, 0xabd4dcce, 0x6416f98d, 0x6642ab5b
};
public static sbyte* Decrypt(uint* password)
{
for (int i = 1; i >= 0; i--)
{
uint temp1 = *((uint*)(password + (i * 2) + 1));
uint temp2 = *((uint*)(password + (i * 2)));
for (int j = 11; j >= 0; j--)
{
temp1 = (uint)RollRight(temp1 - _key[(j * 2) + 7], (byte)temp2) ^ temp2;
temp2 = (uint)RollRight(temp2 - _key[(j * 2) + 6], (byte)temp1) ^ temp1;
}
password[(i * 2) + 1] = temp1 - _key[5];
password[i * 2] = temp2 - _key[4];
}
return (sbyte*)password;
}
public static sbyte* Encrypt(uint* password)
{
for (int i = 1; i >= 0; i--)
{
uint temp1 = _key[5] + password[(i * 2) + 1];
uint temp2 = _key[4] + password[i * 2];
for (int j = 0; j < 12; j++)
{
temp2 = (uint)RollLeft(temp1 ^ temp2, (byte)temp1) + _key[(j * 2) + 6];
temp1 = (uint)RollLeft(temp1 ^ temp2, (byte)temp2) + _key[(j * 2) + 7];
}
password[i * 2] = temp2;
password[i * 3] = temp1;
}
return (sbyte*)password;
}
public static int RollLeft(uint value, byte roll)
{
roll = (byte)(roll & 0x1f);
return (int)((value << roll) | (value >> (0x20 - roll)));
}
public static int RollRight(uint value, byte roll)
{
roll = (byte)(roll & 0x1f);
return (int)((value << (0x20 - roll)) | (value >> roll));
}
}
Because before that, the password encryption wasn't really known by the public. When TQ added a new layer over the RC5 and that the RC5 was seeded with a random seed, it became less important to keep the information private. Also, the only public implementation was really badly implemented.Quote:
RC5 is used since the beta of Eudemon Online for the password. At patch 5180, TQ added a new layer over this crypto, plus they added a random seed.Quote: