public static void HashTagFile(string path, G2Protocol protocol, ref byte[] hash, ref long size)
{
using (FileStream file = new FileStream(path, FileMode.Open, FileAccess.ReadWrite, FileShare.Read))
{
// record size of file
long originalSize = file.Length;
// sha hash 128k chunks of file
SHA1CryptoServiceProvider sha = new SHA1CryptoServiceProvider();
int read = 0;
int chunkSize = 128; // 128kb chunks
int chunkBytes = chunkSize * 1024;
int buffSize = file.Length > chunkBytes ? chunkBytes : (int)file.Length;
byte[] chunk = new byte[buffSize];
List<byte[]> hashes = new List<byte[]>();
read = 1;
while (read > 0)
{
read = file.Read(chunk, 0, buffSize);
if (read > 0)
hashes.Add(sha.ComputeHash(chunk, 0, read));
}
// write packets - 200 sub-hashes per packet
int writePos = 0;
int hashesLeft = hashes.Count;
while (hashesLeft > 0)
{
int writeCount = (hashesLeft > 100) ? 100 : hashesLeft;
hashesLeft -= writeCount;
SubHashPacket packet = new SubHashPacket();
packet.ChunkSize = chunkSize;
packet.TotalCount = hashes.Count;
packet.SubHashes = new byte[20 * writeCount];
for (int i = 0; i < writeCount; i++)
hashes[writePos++].CopyTo(packet.SubHashes, 20 * i);
byte[] encoded = packet.Encode(protocol);
file.Write(encoded, 0, encoded.Length);
}
// write null - end packets
file.WriteByte(0);
// attach original size to end of file
byte[] sizeBytes = BitConverter.GetBytes(originalSize);
file.Write(sizeBytes, 0, sizeBytes.Length);
// sha1 hash tagged file
file.Seek(0, SeekOrigin.Begin);
hash = sha.ComputeHash(file);
size = file.Length;
}
}
public static void HashTagFile(string path, G2Protocol protocol, ref byte[] hash, ref long size)
{
using (FileStream file = new FileStream(path, FileMode.Open, FileAccess.ReadWrite, FileShare.Read))
{
// record size of file
long originalSize = file.Length;
// sha hash 128k chunks of file
SHA1CryptoServiceProvider sha = new SHA1CryptoServiceProvider();
int read = 0;
int chunkSize = 128; // 128kb chunks
int chunkBytes = chunkSize * 1024;
int buffSize = file.Length > chunkBytes ? chunkBytes : (int)file.Length;
byte[] chunk = new byte[buffSize];
List <byte[]> hashes = new List <byte[]>();
read = 1;
while (read > 0)
{
read = file.Read(chunk, 0, buffSize);
if (read > 0)
{
hashes.Add(sha.ComputeHash(chunk, 0, read));
}
}
// write packets - 200 sub-hashes per packet
int writePos = 0;
int hashesLeft = hashes.Count;
while (hashesLeft > 0)
{
int writeCount = (hashesLeft > 100) ? 100 : hashesLeft;
hashesLeft -= writeCount;
SubHashPacket packet = new SubHashPacket();
packet.ChunkSize = chunkSize;
packet.TotalCount = hashes.Count;
packet.SubHashes = new byte[20 * writeCount];
for (int i = 0; i < writeCount; i++)
{
hashes[writePos++].CopyTo(packet.SubHashes, 20 * i);
}
byte[] encoded = packet.Encode(protocol);
file.Write(encoded, 0, encoded.Length);
}
// write null - end packets
file.WriteByte(0);
// attach original size to end of file
byte[] sizeBytes = BitConverter.GetBytes(originalSize);
file.Write(sizeBytes, 0, sizeBytes.Length);
// sha1 hash tagged file
file.Seek(0, SeekOrigin.Begin);
hash = sha.ComputeHash(file);
size = file.Length;
}
}
