public void FileData_ComputeHashes()
{
string filePath = Path.GetTempFileName();
string fileContents = Guid.NewGuid().ToString();
Uri uri = new Uri(filePath);
try
{
File.WriteAllText(filePath, fileContents);
FileData fileData = FileData.Create(uri, OptionallyEmittedData.Hashes);
fileData.FileLocation.Should().Be(null);
HashData hashes = HashUtilities.ComputeHashes(filePath);
fileData.MimeType.Should().Be(MimeType.Binary);
fileData.Contents.Should().BeNull();
fileData.Hashes.Count.Should().Be(3);
foreach (Hash hash in fileData.Hashes)
{
switch (hash.Algorithm)
{
case "md5": { hash.Value.Should().Be(hashes.MD5); break; }
case "sha-1": { hash.Value.Should().Be(hashes.Sha1); break; }
case "sha-256": { hash.Value.Should().Be(hashes.Sha256); break; }
default: { true.Should().BeFalse(); break; /* unexpected algorithm kind */ }
}
}
}
finally
{
if (File.Exists(filePath))
{
File.Delete(filePath);
}
}
}
public static FileData Create(
Uri uri,
OptionallyEmittedData dataToInsert = OptionallyEmittedData.None,
string mimeType = null,
Encoding encoding = null,
IFileSystem fileSystem = null)
{
if (uri == null)
{
throw new ArgumentNullException(nameof(uri));
}
mimeType = mimeType ?? SarifWriters.MimeType.DetermineFromFileExtension(uri);
fileSystem = fileSystem ?? new FileSystem();
var fileData = new FileData()
{
MimeType = mimeType
};
// Attempt to persist file contents and/or compute file hash and persist
// this information to the log file. In the event that there is some issue
// accessing the file, for example, due to ACLs applied to a directory,
// we currently swallow these exceptions without populating any requested
// data or putting a notification in the log file that a problem
// occurred. Something to discuss moving forward.
try
{
if (!uri.IsAbsoluteUri || !uri.IsFile || !fileSystem.FileExists(uri.LocalPath))
{
return(fileData);
}
string filePath = uri.LocalPath;
if (dataToInsert.Includes(OptionallyEmittedData.BinaryFiles) &&
SarifWriters.MimeType.IsBinaryMimeType(mimeType))
{
fileData.Contents = GetEncodedFileContents(fileSystem, filePath, mimeType, encoding);
}
if (dataToInsert.Includes(OptionallyEmittedData.TextFiles) &&
SarifWriters.MimeType.IsTextualMimeType(mimeType))
{
fileData.Contents = GetEncodedFileContents(fileSystem, filePath, mimeType, encoding);
}
if (dataToInsert.Includes(OptionallyEmittedData.Hashes))
{
HashData hashes = HashUtilities.ComputeHashes(filePath);
fileData.Hashes = new List <Hash>
{
new Hash()
{
Value = hashes.MD5,
Algorithm = "md5",
},
new Hash()
{
Value = hashes.Sha1,
Algorithm = "sha-1",
},
new Hash()
{
Value = hashes.Sha256,
Algorithm = "sha-256",
},
};
}
}
catch (Exception e) when(e is IOException || e is UnauthorizedAccessException)
{
}
return(fileData);
}
public static Artifact Create(
Uri uri,
OptionallyEmittedData dataToInsert = OptionallyEmittedData.None,
Encoding encoding = null,
HashData hashData = null,
IFileSystem fileSystem = null)
{
if (uri == null)
{
throw new ArgumentNullException(nameof(uri));
}
fileSystem = fileSystem ?? new FileSystem();
var artifact = new Artifact()
{
Encoding = encoding?.WebName,
};
string mimeType = SarifWriters.MimeType.DetermineFromFileExtension(uri);
// Attempt to persist file contents and/or compute file hash and persist
// this information to the log file. In the event that there is some issue
// accessing the file, for example, due to ACLs applied to a directory,
// we currently swallow these exceptions without populating any requested
// data or putting a notification in the log file that a problem
// occurred. Something to discuss moving forward.
try
{
bool workTodo = dataToInsert.HasFlag(OptionallyEmittedData.Hashes) ||
dataToInsert.HasFlag(OptionallyEmittedData.TextFiles) ||
dataToInsert.HasFlag(OptionallyEmittedData.BinaryFiles);
if (!workTodo ||
!uri.IsAbsoluteUri ||
!uri.IsFile ||
!fileSystem.FileExists(uri.LocalPath))
{
return(artifact);
}
string filePath = uri.LocalPath;
if (dataToInsert.HasFlag(OptionallyEmittedData.BinaryFiles) &&
SarifWriters.MimeType.IsBinaryMimeType(mimeType))
{
artifact.Contents = GetEncodedFileContents(fileSystem, filePath, mimeType, encoding);
}
if (dataToInsert.HasFlag(OptionallyEmittedData.TextFiles) &&
SarifWriters.MimeType.IsTextualMimeType(mimeType))
{
artifact.Contents = GetEncodedFileContents(fileSystem, filePath, mimeType, encoding);
}
if (dataToInsert.HasFlag(OptionallyEmittedData.Hashes))
{
HashData hashes = hashData ?? HashUtilities.ComputeHashes(filePath);
artifact.Hashes = new Dictionary <string, string>
{
{ "md5", hashes.MD5 },
{ "sha-1", hashes.Sha1 },
{ "sha-256", hashes.Sha256 },
};
}
}
catch (Exception e) when(e is IOException || e is UnauthorizedAccessException)
{
}
return(artifact);
}