int IComparable <BufLen> .CompareTo(BufLen other)
{
return(Compare(this, other));
}
public BufRefLen(BufLen src, int offset, int len) : base(src, offset)
{
LengthDef = Math.Min(len, src.Length - offset);
}
public static ParametersWithIV ToParametersWithIV(this BufLen key, BufLen iv)
{
return(new ParametersWithIV(key.ToKeyParameter(), iv.BaseArray, iv.BaseArrayOffset, iv.Length));
}
public static void Randomize(this BufLen buf)
{
Rnd.NextBytes(buf.BaseArray, buf.BaseArrayOffset, buf.Length);
}
public void Poke(BufLen src, int offset, int maxlen)
{
Array.Copy(src.BaseArray, src.BaseArrayOffset, Data, Position + offset, Math.Min(maxlen, src.Length));
}
public static KeyParameter ToKeyParameter(this BufLen key)
{
return(new KeyParameter(key.BaseArray, key.BaseArrayOffset, key.Length));
}
public static void Decrypt(this BufferedBlockCipher cipher, BufLen key, BufLen iv, BufLen data)
{
cipher.Init(false, new ParametersWithIV(new KeyParameter(key.BaseArray, key.BaseArrayOffset, key.Length), iv.BaseArray, iv.BaseArrayOffset, iv.Length));
cipher.ProcessBytes(data);
}
public BufLen(BufLen src) : base(src)
{
LengthDef = src.LengthDef;
}
public static void AesEcbDecrypt(this BufLen buf, byte[] key)
{
AesEcbCipher.Init(false, new KeyParameter(key));
AesEcbCipher.ProcessBytes(buf);
}
public static void AesEcbDecrypt(this BufLen buf, BufLen key)
{
AesEcbCipher.Init(false, new KeyParameter(key.BaseArray, key.BaseArrayOffset, key.Length));
AesEcbCipher.ProcessBytes(buf);
}
public static BufLen BCGZipDecompressNew(BufLen buf)
{
var reader = new BufRefLen(buf);
// Skip gzip header
var gzheader = reader.ReadBufLen(10);
var flag = gzheader.Peek8(3);
if ((flag & 0x04) != 0)
{
reader.Seek(reader.Read16()); // "Extra"
}
if ((flag & 0x08) != 0)
{
while (reader.Read8() != 0)
{
; // "Name"
}
}
if ((flag & 0x10) != 0)
{
while (reader.Read8() != 0)
{
; // "Comment"
}
}
if ((flag & 0x02) != 0)
{
reader.Read16(); // "CRC16"
}
var z = new ZStream();
z.inflateInit(true);
var dest = new byte[buf.Length * 2];
var destix = 0;
z.next_in_index = reader.BaseArrayOffset;
z.next_in = reader.BaseArray;
z.avail_in = reader.Length - 8;
bigger_dest:
z.next_out = dest;
z.next_out_index = destix;
z.avail_out = dest.Length - destix;
var err = z.inflate(JZlib.Z_FINISH);
if (err != JZlib.Z_BUF_ERROR && err != JZlib.Z_OK && err != JZlib.Z_STREAM_END)
{
throw new IOException("inflating: " + z.msg);
}
if (z.avail_out == 0)
{
var newdest = new byte[dest.Length * 2];
Array.Copy(dest, newdest, dest.Length);
destix = dest.Length;
dest = newdest;
goto bigger_dest;
}
var result = new BufLen(dest, 0, dest.Length - z.avail_out);
z.inflateEnd();
return(result);
}
public static UInt32 Adler32(UInt32 adler, BufLen data)
{
const Int32 BASE = 65521; /* largest prime smaller than 65536 */
const Int32 NMAX = 5552;
UInt32 sum2;
UInt32 n;
int len = data.Length;
/* split Adler-32 into component sums */
sum2 = (adler >> 16) & 0xffff;
adler &= 0xffff;
/* in case user likes doing a byte at a time, keep it fast */
if (data.Length == 1)
{
adler += data[0];
if (adler >= BASE)
{
adler -= BASE;
}
sum2 += adler;
if (sum2 >= BASE)
{
sum2 -= BASE;
}
return(adler | (sum2 << 16));
}
/* initial Adler-32 value (deferred check for len == 1 speed) */
if (data == null)
{
return(1);
}
/* in case short lengths are provided, keep it somewhat fast */
if (data.Length < 16)
{
int ix = 0;
while (len-- > 0)
{
adler += data[ix++];
sum2 += adler;
}
if (adler >= BASE)
{
adler -= BASE;
}
sum2 %= BASE; /* only added so many BASE's */
return(adler | (sum2 << 16));
}
Int32 i = 0;
/* do length NMAX blocks -- requires just one modulo operation */
while (len >= NMAX)
{
len -= NMAX;
n = NMAX / 16; /* NMAX is divisible by 16 */
do
{
//DO16(data); /* 16 sums unrolled */
adler += data[i]; sum2 += adler;
adler += data[i + 1]; sum2 += adler;
adler += data[i + 2]; sum2 += adler;
adler += data[i + 3]; sum2 += adler;
adler += data[i + 4]; sum2 += adler;
adler += data[i + 5]; sum2 += adler;
adler += data[i + 6]; sum2 += adler;
adler += data[i + 7]; sum2 += adler;
adler += data[i + 8]; sum2 += adler;
adler += data[i + 9]; sum2 += adler;
adler += data[i + 10]; sum2 += adler;
adler += data[i + 11]; sum2 += adler;
adler += data[i + 12]; sum2 += adler;
adler += data[i + 13]; sum2 += adler;
adler += data[i + 14]; sum2 += adler;
adler += data[i + 15]; sum2 += adler;
i += 16;
} while (--n > 0);
adler %= BASE;
sum2 %= BASE;
}
/* do remaining bytes (less than NMAX, still just one modulo) */
if (len > 0)
{ /* avoid modulos if none remaining */
while (len >= 16)
{
len -= 16;
adler += data[i]; sum2 += adler;
adler += data[i + 1]; sum2 += adler;
adler += data[i + 2]; sum2 += adler;
adler += data[i + 3]; sum2 += adler;
adler += data[i + 4]; sum2 += adler;
adler += data[i + 5]; sum2 += adler;
adler += data[i + 6]; sum2 += adler;
adler += data[i + 7]; sum2 += adler;
adler += data[i + 8]; sum2 += adler;
adler += data[i + 9]; sum2 += adler;
adler += data[i + 10]; sum2 += adler;
adler += data[i + 11]; sum2 += adler;
adler += data[i + 12]; sum2 += adler;
adler += data[i + 13]; sum2 += adler;
adler += data[i + 14]; sum2 += adler;
adler += data[i + 15]; sum2 += adler;
i += 16;
}
while (len-- > 0)
{
adler += data[i++];
sum2 += adler;
}
adler %= BASE;
sum2 %= BASE;
}
/* return recombined sums */
return(adler | (sum2 << 16));
}
public static BufLen BCGZipCompressNew(BufLen buf)
{
var crc = LZUtils.CRC32(buf);
var dest = new byte[buf.Length + 4096];
var destix = 0;
dest[destix++] = 0x1f;
dest[destix++] = 0x8b;
dest[destix++] = 0x08;
dest[destix++] = 0x00;
dest[destix++] = 0x00;
dest[destix++] = 0x00;
dest[destix++] = 0x00;
dest[destix++] = 0x00;
dest[destix++] = 0x02;
dest[destix++] = 0xFF;
var z = new ZStream();
z.deflateInit(6, true);
z.next_in_index = buf.BaseArrayOffset;
z.next_in = buf.BaseArray;
z.avail_in = buf.Length;
bigger_dest:
z.next_out = dest;
z.next_out_index = destix;
z.avail_out = dest.Length - destix;
var err = z.deflate(JZlib.Z_FINISH);
if (err != JZlib.Z_OK && err != JZlib.Z_STREAM_END)
{
throw new IOException("deflating: " + z.msg);
}
if (z.avail_out == 0)
{
var newdest = new byte[dest.Length * 2];
Array.Copy(dest, newdest, dest.Length);
destix = dest.Length;
dest = newdest;
goto bigger_dest;
}
if (z.avail_out < 8)
{
var newdest = new byte[dest.Length + 8];
Array.Copy(dest, newdest, dest.Length);
destix = dest.Length;
dest = newdest;
goto bigger_dest;
}
var result = new BufLen(dest, 0, 10 + dest.Length - z.avail_out + 8);
result.Poke32(crc, result.Length - 8);
result.Poke32((uint)buf.Length, result.Length - 4);
z.deflateEnd();
/*
* using ( var foos = new FileStream( "test.gz", FileMode.Create, FileAccess.Write ) )
* {
* foos.Write( msb );
* }
*/
return(result);
}
public void Poke(BufLen src)
{
PreWriteCheck(src.Length);
Array.Copy(src.BaseArray, src.BaseArrayOffset, Data, Position, src.Length);
}
public static void Decrypt(this CbcBlockCipher cipher, BufLen key, BufLen iv, BufLen data)
{
cipher.Init(false, key.ToParametersWithIV(iv));
cipher.ProcessBytes(data);
}
public void Poke(BufLen src, int offset)
{
PreWriteCheck(offset + src.Length);
Array.Copy(src.BaseArray, src.BaseArrayOffset, Data, Position + offset, src.Length);
}
public static void ProcessBytes(this BufferedBlockCipher cipher, BufLen data)
{
cipher.ProcessBytes(data.BaseArray, data.BaseArrayOffset, data.Length, data.BaseArray, data.BaseArrayOffset);
}
public BufLen(BufLen src, int offset)
: base(src, offset)
{
LengthDef = src.LengthDef - offset;
}
public void Poke(BufLen src, int offset)
{
Array.Copy(src.BaseArray, src.BaseArrayOffset, Data, Position + offset, src.Length);
}
