public string Encode(string PlainTextString)
{
char[] Head = new char[5];
char[] Tail = new char[5];
char[] TempChar8 = new char[8];
char[] TempChar = new char[5];
long Time;
long CheckSum = 0;
long LongReverse = 0;
int PlainTxtLen = PlainTextString.Length;
int GroupsOf5Chars = (int)Math.Floor((double)(PlainTxtLen / 5));
int EncTxtStrLen;
int dx = (PlainTxtLen > 255) ? 8 : 0;
ArrayChar ArrayOut = new ArrayChar(8 * GroupsOf5Chars + 24 + dx);
String Out;
Time = ((long)DateTime.Now.Ticks);
Time = Time / 10000000L;
Time = Time - BaseTime;
Head = LongToCharArray(Time);
TempChar8 = ToBase32(Head);
ArrayOut.Add(TempChar8);
CheckSum = CalcChecksum(CheckSum, Head);
for (int Idx = 0; Idx < GroupsOf5Chars; Idx++)
{
TempChar = PlainTextString.ToCharArray(Idx * 5, 5);
ReverseChunk(TempChar);
LongReverse = CharArrayToLong(TempChar);
TempChar8 = ToBase32(TempChar);
ArrayOut.Add(TempChar8);
CheckSum = CalcChecksum(CheckSum, TempChar);
}
EncTxtStrLen = PlainTextString.Length % 5;
for (int Idx = 0; Idx < EncTxtStrLen; Idx++)
{
TempChar[Idx] = PlainTextString.ToCharArray()[((GroupsOf5Chars) * 5) + Idx];
}
for (int Idx = EncTxtStrLen; Idx < 5; Idx++)
{
TempChar[Idx] = (char)(5 - Idx);
}
ReverseChunk(TempChar);
TempChar8 = ToBase32(TempChar);
ArrayOut.Add(TempChar8);
CheckSum = CalcChecksum(CheckSum, TempChar);
Tail = LongToCharArray(CheckSum);
if (PlainTxtLen > 255)
{
Tail[4] = (char)0;
}
else
{
Tail[4] = (char)PlainTxtLen;
}
TempChar8 = ToBase32(Tail);
ArrayOut.Add(TempChar8);
if (PlainTxtLen > 255)
{
Tail = LongToCharArray(PlainTxtLen);
TempChar8 = ToBase32(Tail);
ArrayOut.Add(TempChar8);
}
Out = new String(ArrayOut.GetBuffer());
return(Out);
}
public string Encode(string PlainTextString)
{
char[] Head = new char[5];
char[] Tail = new char[5];
char[] TempChar8 = new char[8];
char[] TempChar = new char[5];
long Time;
long CheckSum = 0;
long LongReverse = 0;
int PlainTxtLen = PlainTextString.Length;
int GroupsOf5Chars = (int)Math.Floor((double)(PlainTxtLen / 5));
int EncTxtStrLen;
int dx = (PlainTxtLen > 255) ? 8 : 0;
ArrayChar ArrayOut = new ArrayChar(8 * GroupsOf5Chars + 24 + dx);
String Out;
Time = ((long)DateTime.Now.Ticks);
Time = Time / 10000000L;
Time = Time - BaseTime;
Head = LongToCharArray(Time);
TempChar8 = ToBase32(Head);
ArrayOut.Add(TempChar8);
CheckSum = CalcChecksum(CheckSum, Head);
for (int Idx = 0; Idx < GroupsOf5Chars; Idx++)
{
TempChar = PlainTextString.ToCharArray(Idx * 5, 5);
ReverseChunk(TempChar);
LongReverse = CharArrayToLong(TempChar);
TempChar8 = ToBase32(TempChar);
ArrayOut.Add(TempChar8);
CheckSum = CalcChecksum(CheckSum, TempChar);
}
EncTxtStrLen = PlainTextString.Length % 5;
for (int Idx = 0; Idx < EncTxtStrLen; Idx++)
{
TempChar[Idx] = PlainTextString.ToCharArray()[((GroupsOf5Chars) * 5) + Idx];
}
for (int Idx = EncTxtStrLen; Idx < 5; Idx++)
{
TempChar[Idx] = (char)(5 - Idx);
}
ReverseChunk(TempChar);
TempChar8 = ToBase32(TempChar);
ArrayOut.Add(TempChar8);
CheckSum = CalcChecksum(CheckSum, TempChar);
Tail = LongToCharArray(CheckSum);
if (PlainTxtLen > 255)
{
Tail[4] = (char)0;
}
else
{
Tail[4] = (char)PlainTxtLen;
}
TempChar8 = ToBase32(Tail);
ArrayOut.Add(TempChar8);
if (PlainTxtLen > 255)
{
Tail = LongToCharArray(PlainTxtLen);
TempChar8 = ToBase32(Tail);
ArrayOut.Add(TempChar8);
}
Out = new String(ArrayOut.GetBuffer());
return (Out);
}
public string Decode(string EncodedTxtString, long Expire)
{
char[] buff = new char[6];
char[] chunk = new char[5];
char[] head = new char[5];
char[] tail = new char[5];
char[] temp = new char[8];
long EncodedTxtLen = EncodedTxtString.Length;
long checksum = 0;
StringBuilder strBldr = new StringBuilder(512);
int dx = 0;
buff[5] = (char)0;
if (((EncodedTxtLen % 8) != 0) || (EncodedTxtLen < 16))
{
throw (new Exception("Checksum Invalid!"));
}
if (EncodedTxtLen > 432)
{
dx = 8;
}
ArrayChar IncAsChar = new ArrayChar((int)EncodedTxtLen);
IncAsChar.Add(EncodedTxtString.ToCharArray());
head = FromBase32(IncAsChar.Read(8));
long time = CharArrayToLong(head);
checksum = CalcChecksum(checksum, head);
EncodedTxtLen -= 8;
while (EncodedTxtLen > (8 + dx))
{
temp = IncAsChar.Read(8);
chunk = FromBase32(temp);
checksum = CalcChecksum(checksum, chunk);
ReverseChunk(chunk);
EncodedTxtLen -= 8;
strBldr.Append(chunk);
}
tail = FromBase32(IncAsChar.Read(8));
EncodedTxtLen -= 8;
int leng = (int)tail[4];
long CheckSum = CharArrayToLong(tail);
if (leng == 0 && EncodedTxtLen > 0)
{
tail = FromBase32(IncAsChar.Read(8));
leng = (int)CharArrayToLong(tail);
}
if (CheckSum != checksum)
{
throw (new Exception("Checksum Invalid!"));
}
if (System.DateTime.Now.Ticks > (long)(time + Expire + BaseTime) * 10000000L)
{
throw (new Exception("Time expired!"));
}
return(strBldr.ToString(0, leng));
}
public string Decode(string EncodedTxtString, long Expire)
{
char[] buff = new char[6];
char[] chunk = new char[5];
char[] head = new char[5];
char[] tail = new char[5];
char[] temp = new char[8];
long EncodedTxtLen = EncodedTxtString.Length;
long checksum = 0;
StringBuilder strBldr = new StringBuilder(512);
int dx = 0;
buff[5] = (char)0;
if (((EncodedTxtLen % 8) != 0) || (EncodedTxtLen < 16))
{
throw (new Exception("Checksum Invalid!"));
}
if (EncodedTxtLen > 432)
{
dx = 8;
}
ArrayChar IncAsChar = new ArrayChar((int)EncodedTxtLen);
IncAsChar.Add(EncodedTxtString.ToCharArray());
head = FromBase32(IncAsChar.Read(8));
long time = CharArrayToLong(head);
checksum = CalcChecksum(checksum, head);
EncodedTxtLen -= 8;
while (EncodedTxtLen > (8 + dx))
{
temp = IncAsChar.Read(8);
chunk = FromBase32(temp);
checksum = CalcChecksum(checksum, chunk);
ReverseChunk(chunk);
EncodedTxtLen -= 8;
strBldr.Append(chunk);
}
tail = FromBase32(IncAsChar.Read(8));
EncodedTxtLen -= 8;
int leng = (int)tail[4];
long CheckSum = CharArrayToLong(tail);
if (leng == 0 && EncodedTxtLen > 0)
{
tail = FromBase32(IncAsChar.Read(8));
leng = (int)CharArrayToLong(tail);
}
if (CheckSum != checksum)
{
throw (new Exception("Checksum Invalid!"));
}
if (System.DateTime.Now.Ticks > (long)(time + Expire + BaseTime) * 10000000L)
{
throw (new Exception("Time expired!"));
}
return (strBldr.ToString(0, leng));
}
