public void HexToBytesBadChars()
{
const string GoodChars = "0123456789ABCDEFabcdef";
var badCharactersMistakenlyAllowed = new List <char>();
for (char c = '!'; c <= '~'; c++)
{
if (GoodChars.IndexOf(c) == -1)
{
try
{
HexHelper.HexToBytes(new string(new[] { c, c }));
// Should not get here.
badCharactersMistakenlyAllowed.Add(c);
}
catch (ArgumentException)
{
}
}
}
Assert.Equal(0, badCharactersMistakenlyAllowed.Count);
}
public void HexToBytesBasics()
{
byte[] bytes = HexHelper.HexToBytes("0123456789ABCDEFabcdef");
AssertBytes(new byte[] { 0x01, 0x23, 0x45, 0x67, 0x89, 0xAB, 0xCD, 0xEF, 0xAB, 0xCD, 0xEF, },
bytes);
bytes = HexHelper.HexToBytes(string.Empty);
AssertBytes(Array.Empty <byte>(), bytes);
// 0x prefix.
bytes = HexHelper.HexToBytes("0x1234");
AssertBytes(new byte[] { 0x12, 0x34 }, bytes);
// Odd number of hex digits - last should be ignored.
bytes = HexHelper.HexToBytes("fAbCd");
AssertBytes(new byte[] { 0xFA, 0xBC }, bytes);
// Whitespace - should be trimmed.
bytes = HexHelper.HexToBytes(" ABCD\t\t");
AssertBytes(new byte[] { 0xAB, 0xCD }, bytes);
// Whitespace + 0x
bytes = HexHelper.HexToBytes(" 0x9876");
AssertBytes(new byte[] { 0x98, 0x76 }, bytes);
}
/// <summary>
/// Creates a new info hash.
/// </summary>
/// <param name="hex">The hash as an hexadecimal string.</param>
public InfoHash(string hex)
{
if (hex == null)
{
throw new ArgumentNullException("hex");
}
else if (hex.Length != 40)
{
throw new ArgumentException("The hash must be 20 bytes in size (40 hexadecimal characters).", "hex");
}
this.hash = HexHelper.HexToBytes(hex);
}
public void BytesToHexNull()
{
byte[] result = HexHelper.HexToBytes(null);
Assert.NotNull(result);
Assert.Equal(0, result.Length);
}
private void Load(BEncoding.Dictionary torrentInfo)
{
ClearInfo();
BEncoding.List announceList;
if (torrentInfo.TryGetList("announce-list", out announceList))
{
int announceCount = announceList.Count;
var newAnnounceList = new List <AnnounceItem>(announceCount);
for (int i = 0; i < announceCount; i++)
{
var urlList = (announceList[i] as BEncoding.List);
if (urlList != null)
{
int urlCount = urlList.Count;
var newUrlList = new List <string>(urlCount);
for (int j = 0; j < urlCount; j++)
{
string url = urlList.GetString(j);
if (!string.IsNullOrEmpty(url))
{
newUrlList.Add(url);
}
}
if (newUrlList.Count > 0)
{
newAnnounceList.Add(new AnnounceItem(newUrlList.ToArray()));
}
}
}
announces = newAnnounceList.ToArray();
}
else
{
string announceUrl;
if (torrentInfo.TryGetString("announce", out announceUrl))
{
announces = new AnnounceItem[]
{
new AnnounceItem(announceUrl)
};
}
}
long creationDateTimestamp;
if (!torrentInfo.TryGetString("comment", out comment))
{
comment = null;
}
if (!torrentInfo.TryGetString("created by", out createdBy))
{
createdBy = null;
}
if (torrentInfo.TryGetInteger("creation date", out creationDateTimestamp))
{
creationDate = TimeHelper.GetDateFromUnixTimestamp(creationDateTimestamp);
}
else
{
creationDate = DateTime.MinValue;
}
BEncoding.Dictionary info;
if (!torrentInfo.TryGetDictionary("info", out info))
{
throw new InvalidDataException("The info dictionary is missing in the torrent meta-data.");
}
infoHash = ComputeInfoHash(info);
long pieceSize;
if (!info.TryGetInteger("piece length", out pieceSize))
{
throw new InvalidDataException("The piece length is missing in the torrent meta-data. But it is required for all torrents.");
}
byte[] pieceHashData;
if (!info.TryGetByteArray("pieces", out pieceHashData))
{
throw new InvalidDataException("The piece hashes are missing in the torrent meta-data. But it is required for all torrents.");
}
else if ((pieceHashData.Length % 20) != 0)
{
throw new InvalidDataException("The piece hashes are invalid in the torrent meta-data. It must be a multiple of 20 (for SHA1 hashes).");
}
int pieceCount = (pieceHashData.Length / 20);
pieceHashes = new PieceHash[pieceCount];
for (int i = 0; i < pieceCount; i++)
{
byte[] pieceHashBytes = new byte[20];
Buffer.BlockCopy(pieceHashData, (i * 20), pieceHashBytes, 0, 20);
pieceHashes[i] = new PieceHash(pieceHashBytes);
}
long isPrivate;
if (info.TryGetInteger("private", out isPrivate) && isPrivate == 1)
{
this.isPrivate = true;
}
if (!info.TryGetString("source", out source))
{
source = null;
}
if (!info.TryGetString("name", out name) || string.IsNullOrEmpty(name))
{
throw new InvalidDataException("The name string is missing in the torrent meta-data. But it is required for all torrents.");
}
this.pieceSize = (int)pieceSize;
BEncoding.List fileList;
if (info.TryGetList("files", out fileList))
{
int fileCount = fileList.Count;
files = new FileItem[fileCount];
for (int i = 0; i < fileCount; i++)
{
var fileItem = fileList[i] as BEncoding.Dictionary;
if (fileItem == null)
{
throw new InvalidDataException("The format of the torrent meta-data is invalid. Expected a dictionary of file information.");
}
long fileSize;
if (!fileItem.TryGetInteger("length", out fileSize))
{
throw new InvalidDataException("The format of the torrent meta-data is invalid. Expected a file size.");
}
string fileMD5HashHex;
byte[] fileMD5Hash = null;
if (fileItem.TryGetString("md5sum", out fileMD5HashHex) && fileMD5HashHex.Length == 32)
{
fileMD5Hash = HexHelper.HexToBytes(fileMD5HashHex);
}
BEncoding.List pathList;
if (!fileItem.TryGetList("path", out pathList))
{
throw new InvalidDataException("The format of the torrent meta-data is invalid. Expected a file path.");
}
int pathPartCount = pathList.Count;
string[] pathParts = new string[pathPartCount];
for (int j = 0; j < pathPartCount; j++)
{
string pathPart = pathList.GetString(j);
if (string.IsNullOrEmpty(pathPart))
{
throw new InvalidDataException("The format of the torrent meta-data is invalid. Expected a file path.");
}
pathParts[j] = pathPart;
}
string filePath = string.Join("/", pathParts);
files[i] = new FileItem(filePath, fileSize, fileMD5Hash);
}
}
else
{
long fileSize;
if (!info.TryGetInteger("length", out fileSize))
{
throw new InvalidDataException("The file length is missing in the torrent meta-data. But it is required for single-file torrents.");
}
string fileMD5HashHex;
byte[] fileMD5Hash = null;
if (info.TryGetString("md5sum", out fileMD5HashHex) && fileMD5HashHex.Length == 32)
{
fileMD5Hash = HexHelper.HexToBytes(fileMD5HashHex);
}
files = new FileItem[]
{
new FileItem(name, fileSize, fileMD5Hash)
};
}
totalSize = ComputeTotalSize();
int expectedPieceCount = (int)((totalSize - 1) / pieceSize) + 1;
if (expectedPieceCount != pieceHashes.Length)
{
throw new InvalidOperationException(string.Format("The calculated number of pieces is {0} while there are {1} piece hashes.", expectedPieceCount, pieceHashes.Length));
}
}
public void TestCreateNtlmChallengeMessage()
{
const string originHex = "4e544c4d53535000020000000c000c0030000000010281000123456789abcdef0000000000000000620062003c00000044004f004d00410049004e0002000c0044004f004d00410049004e0001000c005300450052005600450052000400140064006f006d00610069006e002e0063006f006d00030022007300650072007600650072002e0064006f006d00610069006e002e0063006f006d0000000000";
var messageStruct = new ChallengeMessageStruct
{
Signature = Constants.NtlmsspBytes,
Type = MessageType.Challenge,
Flags = MessageFlag.NegotiateUnicode
| MessageFlag.NegotiateNtlm
| MessageFlag.TargetTypeDomain
| MessageFlag.NegotiateTargetInfo,
Challenge = HexHelper.HexToBytes("0123456789abcdef"),
Context = HexHelper.HexToBytes("0000000000000000")
};
var message = new NtlmChallengeMessage(messageStruct, "DOMAIN");
message.TargetInfoList.Add(new NtlmTargetInfo(TargetInfoType.DomainName, "DOMAIN", Encoding.Unicode));
message.TargetInfoList.Add(new NtlmTargetInfo(TargetInfoType.ServerName, "SERVER", Encoding.Unicode));
message.TargetInfoList.Add(new NtlmTargetInfo(TargetInfoType.DnsDomainName, "domain.com", Encoding.Unicode));
message.TargetInfoList.Add(new NtlmTargetInfo(TargetInfoType.FQDN, "server.domain.com", Encoding.Unicode));
message.TargetInfoList.Add(new NtlmTargetInfo(TargetInfoType.Terminator));
message.Rectify();
Assert.IsTrue(message.Signature == Constants.Ntlmssp);
Assert.IsTrue(message.Type == MessageType.Challenge);
Assert.IsTrue(message.Flags == (MessageFlag.NegotiateUnicode
| MessageFlag.NegotiateNtlm
| MessageFlag.TargetTypeDomain
| MessageFlag.NegotiateTargetInfo));
const string challengeHex = "0123456789abcdef";
Assert.IsTrue(message.Message.Challenge.BytesToHex()
.Equals(challengeHex, StringComparison.InvariantCultureIgnoreCase));
Assert.IsTrue(message.Message.TargetNameLength == 12);
Assert.IsTrue(message.Message.TargetNameSpace == 12);
Assert.IsTrue(message.Message.TargetNameOffset == 48);
Assert.IsTrue(message.TargetName == "DOMAIN");
Assert.IsTrue(message.Message.TargetInfosLength == 98);
Assert.IsTrue(message.Message.TargetInfosSpace == 98);
Assert.IsTrue(message.Message.TargetInfosOffset == 60);
var info = message.TargetInfoList;
Assert.IsTrue(info.Count == 5);
Assert.IsTrue(info[0].TargetInfoType == TargetInfoType.DomainName);
Assert.IsTrue(info[0].TargetContent == "DOMAIN");
Assert.IsTrue(info[1].TargetInfoType == TargetInfoType.ServerName);
Assert.IsTrue(info[1].TargetContent == "SERVER");
Assert.IsTrue(info[2].TargetInfoType == TargetInfoType.DnsDomainName);
Assert.IsTrue(info[2].TargetContent == "domain.com");
Assert.IsTrue(info[3].TargetInfoType == TargetInfoType.FQDN);
Assert.IsTrue(info[3].TargetContent == "server.domain.com");
Assert.IsTrue(info[4].TargetInfoType == TargetInfoType.Terminator);
Assert.IsTrue(info[4].TargetContent == null);
var actualHex = message.ToBytes().BytesToHex();
Assert.IsTrue(originHex.Equals(actualHex, StringComparison.InvariantCultureIgnoreCase));
}