private void executeButton_Click(object sender, EventArgs e)
{
try
{
if (!CheckInput())
return;
logger.Clear();
#region Read settings from UI
var version = (BranchCacheVersion)branchCacheVersionComboBox.SelectedItem;
var operationMode = (OperationMode)operationModeComboBox.SelectedItem;
var transport = (ContentInformationTransport)transportComboBox.SelectedItem;
var serverSecret = serverSecretTextBox.Text;
var filePath = filePathTextBox.Text;
var hashAlgoValue = (dwHashAlgo_Values)hashAlgorithmComboBox.SelectedItem;
HashAlgorithm hashAlgorithm;
HMAC hmacAlgorithm;
int hashBlockSize;
string server = null;
string file = null;
string sharedFolder = null;
Match filePathMatch = null;
switch (transport)
{
case ContentInformationTransport.PCCRTP:
filePathMatch = Regex.Match(filePath, httpFilePathPattern);
server = filePathMatch.Groups["Server"].Value;
file = filePathMatch.Groups["FileName"].Value;
break;
case ContentInformationTransport.SMB2:
filePathMatch = Regex.Match(filePath, smb2FilePathPattern);
server = filePathMatch.Groups["Server"].Value;
sharedFolder = filePathMatch.Groups["SharedFolder"].Value;
file = filePathMatch.Groups["FileName"].Value;
break;
default:
throw new NotImplementedException();
}
SecurityPackageType securityPackageType = (SecurityPackageType)smb2AuthenticationComboBox.SelectedItem;
string domainName = domainNameTextBox.Text;
string userName = userNameTextBox.Text;
string userPassword = userPasswordTextBox.Text;
#endregion
var timeout = TimeSpan.FromSeconds(60);
byte[] content;
byte[] contentInformation;
Content_Information_Data_Structure contentInformationStructure = new Content_Information_Data_Structure();
Content_Information_Data_Structure_V2 contentInformationStructureV2 = new Content_Information_Data_Structure_V2();
#region Read content and content information
if (operationMode == OperationMode.RemoteHashVerification)
{
switch (transport)
{
case ContentInformationTransport.PCCRTP:
PccrtpClient pccrtpClient = new PccrtpClient();
PccrtpRequest pccrtpRequest = pccrtpClient.CreatePccrtpRequest(
server,
80,
file,
version);
PccrtpResponse pccrtpResponse = pccrtpClient.SendHttpRequest(
HttpVersionType.HttpVersion11,
pccrtpRequest,
(int)timeout.TotalMilliseconds);
if (pccrtpResponse.HttpResponse.ContentEncoding == "peerdist")
{
contentInformation = pccrtpResponse.PayloadData;
content = Utility.DownloadHTTPFile(server, file);
}
else
{
content = pccrtpResponse.PayloadData;
Thread.Sleep(5000); // Wait for hash generation
pccrtpResponse = pccrtpClient.SendHttpRequest(
HttpVersionType.HttpVersion11,
pccrtpRequest,
(int)timeout.TotalMilliseconds);
contentInformation = pccrtpResponse.PayloadData;
}
break;
case ContentInformationTransport.SMB2:
using (Smb2ClientTransport smb2Client = new Smb2ClientTransport(timeout))
{
smb2Client.OpenFile(
server,
sharedFolder,
file,
securityPackageType,
domainName,
userName,
userPassword,
AccessMask.GENERIC_READ);
content = smb2Client.ReadAllBytes();
Thread.Sleep(5000); // Wait for hash generation
HASH_HEADER hashHeader;
smb2Client.ReadHash(
SRV_READ_HASH_Request_HashType_Values.SRV_HASH_TYPE_PEER_DIST,
version == BranchCacheVersion.V1 ? SRV_READ_HASH_Request_HashVersion_Values.SRV_HASH_VER_1 : SRV_READ_HASH_Request_HashVersion_Values.SRV_HASH_VER_2,
version == BranchCacheVersion.V1 ? SRV_READ_HASH_Request_HashRetrievalType_Values.SRV_HASH_RETRIEVE_HASH_BASED : SRV_READ_HASH_Request_HashRetrievalType_Values.SRV_HASH_RETRIEVE_FILE_BASED,
0,
uint.MaxValue,
out hashHeader,
out contentInformation);
}
break;
default:
throw new NotImplementedException();
}
switch (version)
{
case BranchCacheVersion.V1:
contentInformationStructure = PccrcUtility.ParseContentInformation(contentInformation);
break;
case BranchCacheVersion.V2:
contentInformationStructureV2 = PccrcUtility.ParseContentInformationV2(contentInformation);
break;
default:
throw new NotImplementedException();
}
}
else
{
content = File.ReadAllBytes(filePath);
}
#endregion
#region Calculate hash and execute verification
switch (version)
{
case BranchCacheVersion.V1:
if (operationMode == OperationMode.RemoteHashVerification)
PccrcUtility.GetHashAlgorithm(contentInformationStructure.dwHashAlgo, out hashAlgorithm, out hmacAlgorithm, out hashBlockSize);
else
PccrcUtility.GetHashAlgorithm(hashAlgoValue, out hashAlgorithm, out hmacAlgorithm, out hashBlockSize);
hmacAlgorithm.Key = hashAlgorithm.ComputeHash(Encoding.Unicode.GetBytes(serverSecret));
logger.LogInfo(
"Ks = Hash(ServerSecret): {0}",
Utility.ToHexString(hmacAlgorithm.Key));
logger.NewLine();
int blockTotalCount = content.Length / BLOCKBYTECOUNT;
if (content.Length > BLOCKBYTECOUNT * blockTotalCount)
{
blockTotalCount = blockTotalCount + 1;
}
int segmentCount = blockTotalCount / SEGMENTBLOCKCOUNT;
if (blockTotalCount > SEGMENTBLOCKCOUNT * segmentCount)
{
segmentCount = segmentCount + 1;
}
for (int segmentIndex = 0; segmentIndex < segmentCount; segmentIndex++)
{
logger.LogInfo("Segment{0}", segmentIndex);
logger.NewLine();
logger.Indent();
List<byte> blockHashList = new List<byte>();
List<byte> tempList = new List<byte>();
int blockCount = (segmentIndex == segmentCount - 1) ? (blockTotalCount % SEGMENTBLOCKCOUNT) : (SEGMENTBLOCKCOUNT);
for (int blockIndex = 0; blockIndex < blockCount; blockIndex++)
{
logger.LogInfo(
"Block{0} Offset {1} Length {2}",
blockIndex,
BLOCKBYTECOUNT * SEGMENTBLOCKCOUNT * segmentIndex + BLOCKBYTECOUNT * blockIndex,
BLOCKBYTECOUNT);
logger.NewLine();
logger.Indent();
var block = content.Skip(BLOCKBYTECOUNT * SEGMENTBLOCKCOUNT * segmentIndex + BLOCKBYTECOUNT * blockIndex).Take(BLOCKBYTECOUNT).ToArray();
byte[] blockHash = hashAlgorithm.ComputeHash(block);
logger.LogInfo("BlockHash{0} = Hash(Block): {1}", blockIndex, Utility.ToHexString(blockHash));
if (operationMode == OperationMode.RemoteHashVerification &&
!blockHash.SequenceEqual(contentInformationStructure.blocks[segmentIndex].BlockHashes.Skip(blockIndex * hashBlockSize).Take(hashBlockSize)))
{
logger.LogError("Server Returned: {0}", Utility.ToHexString(contentInformationStructure.blocks[segmentIndex].BlockHashes.Skip(blockIndex * hashBlockSize).Take(hashBlockSize).ToArray()));
}
blockHashList.AddRange(blockHash);
logger.Unindent();
logger.NewLine();
}
byte[] hod = hashAlgorithm.ComputeHash(blockHashList.ToArray());
logger.LogInfo(
"HoD = Hash(BlockHash0 + BlockHash1 + ... + BlockHashN): {0}",
Utility.ToHexString(hod));
if (operationMode == OperationMode.RemoteHashVerification &&
!hod.SequenceEqual(contentInformationStructure.segments[segmentIndex].SegmentHashOfData))
{
logger.LogError("Server Returned: {0}", Utility.ToHexString(contentInformationStructure.segments[segmentIndex].SegmentHashOfData));
}
logger.NewLine();
byte[] kp = hmacAlgorithm.ComputeHash(hod);
logger.LogInfo(
"Kp = HMAC(Ks, HoD): {0}",
Utility.ToHexString(kp));
if (operationMode == OperationMode.RemoteHashVerification &&
!kp.SequenceEqual(contentInformationStructure.segments[segmentIndex].SegmentSecret))
{
logger.LogError("Server Returned: {0}", Utility.ToHexString(contentInformationStructure.segments[segmentIndex].SegmentSecret));
}
logger.NewLine();
tempList.AddRange(hod);
tempList.AddRange(Encoding.Unicode.GetBytes(HOHODK_APPEND_STRING));
byte[] hoHoDK = hashAlgorithm.ComputeHash(tempList.ToArray());
logger.LogInfo(
"hoHoDK = HMAC(HoD + \"MS_P2P_CACHING\"): {0}",
Utility.ToHexString(hoHoDK));
logger.NewLine();
logger.Unindent();
}
break;
case BranchCacheVersion.V2:
PccrcUtility.GetHashAlgorithm(dwHashAlgoV2_Values.TRUNCATED_SHA512, out hashAlgorithm, out hmacAlgorithm);
hmacAlgorithm.Key = hashAlgorithm.ComputeHash(Encoding.Unicode.GetBytes(serverSecret)).Take(32).ToArray();
logger.LogInfo(
"Ks = Hash(ServerSecret): {0}",
Utility.ToHexString(hmacAlgorithm.Key));
logger.NewLine();
int segmentLength = BLOCKBYTECOUNT;
int chunkCount = 1;
if (operationMode == OperationMode.RemoteHashVerification)
chunkCount = contentInformationStructureV2.chunks.Length;
int segmentOffset = 0;
for (int chunkIndex = 0; chunkIndex < chunkCount; chunkIndex++)
{
logger.LogInfo("Chunk{0}", chunkIndex);
logger.NewLine();
logger.Indent();
segmentCount = content.Length / segmentLength;
if (content.Length > segmentCount * segmentLength)
segmentCount++;
if (operationMode == OperationMode.RemoteHashVerification)
segmentCount = contentInformationStructureV2.chunks[chunkIndex].chunkData.Length;
for (int segmentIndex = 0; segmentIndex < segmentCount; ++segmentIndex)
{
logger.LogInfo(
"Segment{0} Offset {1} Length {2}",
segmentIndex,
segmentOffset,
BLOCKBYTECOUNT);
logger.NewLine();
logger.Indent();
if (operationMode == OperationMode.RemoteHashVerification)
segmentLength = (int)contentInformationStructureV2.chunks[chunkIndex].chunkData[segmentIndex].cbSegment;
List<byte> tempList = new List<byte>();
var segment = content.Skip(segmentOffset).Take(segmentLength).ToArray();
segmentOffset += segmentLength;
//TRANCATED_SHA_512
byte[] hod = hashAlgorithm.ComputeHash(segment).Take(32).ToArray();
logger.LogInfo(
"HoD = Hash(Segment): {0}",
Utility.ToHexString(hod));
if (operationMode == OperationMode.RemoteHashVerification &&
!hod.SequenceEqual(contentInformationStructureV2.chunks[chunkIndex].chunkData[segmentIndex].SegmentHashOfData))
{
logger.LogError("Server Returned: {0}", Utility.ToHexString(contentInformationStructureV2.chunks[chunkIndex].chunkData[segmentIndex].SegmentHashOfData));
}
logger.NewLine();
byte[] kp = hmacAlgorithm.ComputeHash(hod).Take(32).ToArray();
logger.LogInfo(
"Kp = HMAC(Ks, HoD): {0}",
Utility.ToHexString(kp));
if (operationMode == OperationMode.RemoteHashVerification &&
!kp.SequenceEqual(contentInformationStructureV2.chunks[chunkIndex].chunkData[segmentIndex].SegmentSecret))
{
logger.LogError("Server Returned: {0}", Utility.ToHexString(contentInformationStructureV2.chunks[chunkIndex].chunkData[segmentIndex].SegmentSecret));
}
logger.NewLine();
tempList.AddRange(hod);
tempList.AddRange(Encoding.Unicode.GetBytes(HOHODK_APPEND_STRING));
byte[] hoHoDK = hashAlgorithm.ComputeHash(tempList.ToArray());
logger.LogInfo(
"hoHoDK = HMAC(HoD + \"MS_P2P_CACHING\"): {0}",
Utility.ToHexString(hoHoDK));
logger.NewLine();
logger.Unindent();
}
}
break;
default:
throw new NotImplementedException();
}
if (operationMode == OperationMode.RemoteHashVerification)
{
if (logger.HasError)
{
Utility.ShowMessageBox("Hash verification error found!", MessageBoxIcon.Error);
}
else
{
Utility.ShowMessageBox("Hash verification passed!", MessageBoxIcon.Information);
}
}
#endregion
}
catch (Exception ex)
{
Utility.ShowMessageBox(ex.Message + "\r\n\r\n" + ex.StackTrace, MessageBoxIcon.Error);
}
}
/// <summary>
/// Create BATCHED_OFFER_MESSAGE package.
/// </summary>
/// <param name="connectionInfoPort">
/// A 16-bit unsigned integer that MUST be set by the client to the port
/// on which it is listening as a server-role peer, for use with the retrieval protocol.
/// </param>
/// <param name="contentInfo">A Content Information V2 data structure.</param>
/// <returns>Return the BATCHED_OFFER_MESSAGE.</returns>
public BATCHED_OFFER_MESSAGE CreateBatchedOfferMessage(
int connectionInfoPort,
Content_Information_Data_Structure_V2 contentInfo)
{
MESSAGE_HEADER messageHeader;
messageHeader.MajorVersion = 2;
messageHeader.MinorVersion = 0;
messageHeader.MsgType = PCHC_MESSAGE_TYPE.BATCHED_OFFER_MESSAGE;
messageHeader.Padding = new byte[4];
CONNECTION_INFORMATION connectionInfo;
connectionInfo.Padding = new byte[6];
connectionInfo.Port = (ushort)connectionInfoPort;
BATCHED_OFFER_MESSAGE batchedOfferMessage;
batchedOfferMessage.MessageHeader = messageHeader;
batchedOfferMessage.ConnectionInfo = connectionInfo;
List<SegmentDescriptor> segmentDescriptors = new List<SegmentDescriptor>();
for (int i = 0; i < contentInfo.chunks.Length; i++)
{
var chunk = contentInfo.chunks[i];
for (int j = 0; j < chunk.chunkData.Length; j++)
{
var segment = chunk.chunkData[j];
SegmentDescriptor segmentDescriptor = new SegmentDescriptor();
segmentDescriptor.BlockSize = segment.cbSegment;
segmentDescriptor.SegmentSize = segment.cbSegment;
segmentDescriptor.SizeOfContentTag = 16;
segmentDescriptor.ContentTag = new byte[16];
segmentDescriptor.HashAlgorithm = (byte)contentInfo.dwHashAlgo;
segmentDescriptor.SegmentHoHoDk = contentInfo.GetSegmentId(i, j);
segmentDescriptors.Add(segmentDescriptor);
}
}
batchedOfferMessage.SegmentDescriptors = segmentDescriptors.ToArray();
return batchedOfferMessage;
}
public Content_Information_Data_Structure_V2 CreateContentInformationV2()
{
var contentInformation = new Content_Information_Data_Structure_V2
{
bMajorVersion = 2,
bMinorVersion = 0,
ullIndexOfFirstSegment = 0,
ullLengthOfRange = DefaultBlockSize,
dwOffsetInFirstSegment = 0,
ullStartInContent = 0,
dwHashAlgo = dwHashAlgoV2_Values.TRUNCATED_SHA512,
chunks = new ChunkDescription[]
{
new ChunkDescription
{
dwChunkDataLength = DefaultBlockSize,
chunkData = new SegmentDescriptionV2[]
{
new SegmentDescriptionV2
{
cbSegment = DefaultBlockSize,
SegmentHashOfData = TestUtility.GenerateRandomArray(32),
SegmentSecret = TestUtility.GenerateRandomArray(32)
}
}
}
}
};
return contentInformation;
}
public void Start(int port, CryptoAlgoId_Values cryptoAlgoId, Content_Information_Data_Structure_V2 contentInformationV2, byte[] content, EventQueue eventQueue)
{
this.contentInformationV2 = contentInformationV2;
base.Start(port, cryptoAlgoId, content, eventQueue);
}
public void VerifyHashGenerationV2(byte[] content, Content_Information_Data_Structure_V2 contentInfoV2)
{
dwHashAlgoV2_Values hashAlgo = contentInfoV2.dwHashAlgo;
HashAlgorithm hashAlgorithm;
HMAC hmacAlgorithm;
PccrcUtility.GetHashAlgorithm(hashAlgo, out hashAlgorithm, out hmacAlgorithm);
hmacAlgorithm.Key = hashAlgorithm.ComputeHash(testConfig.ServerSecret).Take(32).ToArray();
// Local calculate SegmentHashOfData and SegmentSecret
ChunkDescription[] chunkDescription = contentInfoV2.chunks;
int chunkCount = contentInfoV2.chunks.Length;
int segmentOffset = 0;
for (int chunkIndex = 0; chunkIndex < chunkCount; chunkIndex++)
{
SegmentDescriptionV2[] segmentDescription = chunkDescription[chunkIndex].chunkData;
int segmentCount = segmentDescription.Length;
for (int segmentIndex = 0; segmentIndex < segmentCount; ++segmentIndex)
{
var segment = content.Skip(segmentOffset).Take((int)(segmentDescription[segmentIndex].cbSegment)).ToArray();
segmentOffset += (int)(segmentDescription[segmentIndex].cbSegment);
//TRANCATED_SHA_512
byte[] hod = hashAlgorithm.ComputeHash(segment).Take(32).ToArray();
testSite.Assert.IsTrue(
hod.SequenceEqual((chunkDescription[chunkIndex].chunkData)[segmentIndex].SegmentHashOfData),
"The local calculated Hod should cosistent with the received value.");
byte[] kp = hmacAlgorithm.ComputeHash(hod).Take(32).ToArray();
testSite.Assert.IsTrue(
kp.SequenceEqual((chunkDescription[chunkIndex].chunkData)[segmentIndex].SegmentSecret),
"The local calculated Kp should be consistent with the received value.");
}
}
}
