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SftpFileStream:

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Only allow Append mode when combined with write-only access.
Fixes issue #267.
This commit is contained in:
Gert Driesen
2017-08-13 10:54:40 +02:00
parent ea36b240aa
commit c2552e4e4b
3 changed files with 21 additions and 129 deletions
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src/Renci.SshNet.Tests/Classes/Sftp/SftpFileStreamTest_Ctor_FileModeAppend_FileAccessRead.cs
+1 -1
View File
@@ -48,7 +48,7 @@ namespace Renci.SshNet.Tests.Classes.Sftp
{
Assert.IsNotNull(_actualException);
Assert.IsNull(_actualException.InnerException);
Assert.AreEqual(string.Format("Combining {0}: {1} with {2}: {3} is invalid.", typeof(FileMode).Name, _fileMode, typeof(FileAccess).Name, _fileAccess), _actualException.Message);
Assert.AreEqual(string.Format("{0} mode can be requested only when combined with write-only access.", _fileMode), _actualException.Message);
Assert.IsNull(_actualException.ParamName);
}
}
src/Renci.SshNet.Tests/Classes/Sftp/SftpFileStreamTest_Ctor_FileModeAppend_FileAccessReadWrite.cs
+15 -128
View File
@@ -1,10 +1,7 @@
using System;
using System.IO;
using System.Threading;
using Microsoft.VisualStudio.TestTools.UnitTesting;
using Moq;
using Renci.SshNet.Sftp;
using Renci.SshNet.Tests.Common;
namespace Renci.SshNet.Tests.Classes.Sftp
{
@@ -16,11 +13,7 @@ namespace Renci.SshNet.Tests.Classes.Sftp
private FileMode _fileMode;
private FileAccess _fileAccess;
private int _bufferSize;
private uint _readBufferSize;
private uint _writeBufferSize;
private byte[] _handle;
private SftpFileStream _target;
private SftpFileAttributes _fileAttributes;
private ArgumentException _actualException;
protected override void SetupData()
{
@@ -31,138 +24,32 @@ namespace Renci.SshNet.Tests.Classes.Sftp
_fileMode = FileMode.Append;
_fileAccess = FileAccess.ReadWrite;
_bufferSize = _random.Next(5, 1000);
_readBufferSize = (uint) _random.Next(5, 1000);
_writeBufferSize = (uint) _random.Next(5, 1000);
_handle = GenerateRandom(_random.Next(1, 10), _random);
_fileAttributes = new SftpFileAttributesBuilder().WithLastAccessTime(DateTime.Now.AddSeconds(_random.Next()))
.WithLastWriteTime(DateTime.Now.AddSeconds(_random.Next()))
.WithSize(_random.Next())
.WithUserId(_random.Next())
.WithGroupId(_random.Next())
.WithPermissions((uint)_random.Next())
.Build();
}
protected override void SetupMocks()
{
SftpSessionMock.InSequence(MockSequence)
.Setup(p => p.RequestOpen(_path, Flags.Read | Flags.Write | Flags.Append, false))
.Returns(_handle);
SftpSessionMock.InSequence(MockSequence)
.Setup(p => p.CalculateOptimalReadLength((uint)_bufferSize))
.Returns(_readBufferSize);
SftpSessionMock.InSequence(MockSequence)
.Setup(p => p.CalculateOptimalWriteLength((uint)_bufferSize, _handle))
.Returns(_writeBufferSize);
SftpSessionMock.InSequence(MockSequence)
.Setup(p => p.RequestFStat(_handle, false))
.Returns(_fileAttributes);
}
protected override void Act()
{
_target = new SftpFileStream(SftpSessionMock.Object,
_path,
_fileMode,
_fileAccess,
_bufferSize);
try
{
new SftpFileStream(SftpSessionMock.Object, _path, _fileMode, _fileAccess, _bufferSize);
Assert.Fail();
}
catch (ArgumentException ex)
{
_actualException = ex;
}
}
[TestMethod]
public void CanReadShouldReturnTrue()
public void CtorShouldHaveThrownArgumentException()
{
Assert.IsTrue(_target.CanRead);
}
[TestMethod]
public void CanSeekShouldReturnTrue()
{
Assert.IsTrue(_target.CanSeek);
}
[TestMethod]
public void CanWriteShouldReturnTrue()
{
Assert.IsTrue(_target.CanWrite);
}
[TestMethod]
public void CanTimeoutShouldReturnTrue()
{
Assert.IsTrue(_target.CanTimeout);
}
[TestMethod]
public void PositionShouldReturnSizeOfFile()
{
SftpSessionMock.InSequence(MockSequence).Setup(p => p.IsOpen).Returns(true);
var actual = _target.Position;
Assert.AreEqual(_fileAttributes.Size, actual);
SftpSessionMock.Verify(p => p.IsOpen, Times.Exactly(1));
}
[TestMethod]
public void ReadShouldStartReadingAtEndOfFile()
{
var buffer = new byte[8];
var data = new byte[] {5, 4, 3, 2, 1};
var expected = new byte[] {0, 5, 4, 3, 2, 1, 0, 0};
SftpSessionMock.InSequence(MockSequence).Setup(p => p.IsOpen).Returns(true);
SftpSessionMock.InSequence(MockSequence).Setup(p => p.RequestRead(_handle, (ulong)_fileAttributes.Size, _readBufferSize)).Returns(data);
var actual = _target.Read(buffer, 1, data.Length);
Assert.AreEqual(data.Length, actual);
Assert.IsTrue(buffer.IsEqualTo(expected));
SftpSessionMock.Verify(p => p.IsOpen, Times.Exactly(1));
SftpSessionMock.Verify(p => p.RequestRead(_handle, (ulong)_fileAttributes.Size, _readBufferSize), Times.Once);
}
[TestMethod]
public void ReadByteShouldStartReadingAtEndOfFile()
{
var data = GenerateRandom(5, _random);
SftpSessionMock.InSequence(MockSequence).Setup(p => p.IsOpen).Returns(true);
SftpSessionMock.InSequence(MockSequence).Setup(p => p.RequestRead(_handle, (ulong) _fileAttributes.Size, _readBufferSize)).Returns(data);
var actual = _target.ReadByte();
Assert.AreEqual(data[0], actual);
SftpSessionMock.Verify(p => p.IsOpen, Times.Exactly(1));
SftpSessionMock.Verify(p => p.RequestRead(_handle, (ulong) _fileAttributes.Size, _readBufferSize), Times.Once);
}
[TestMethod]
public void WriteShouldStartWritingAtEndOfFile()
{
var buffer = new byte[_writeBufferSize];
SftpSessionMock.InSequence(MockSequence).Setup(p => p.IsOpen).Returns(true);
SftpSessionMock.InSequence(MockSequence).Setup(p => p.RequestWrite(_handle, (ulong) _fileAttributes.Size, buffer, 0, buffer.Length, It.IsNotNull<AutoResetEvent>(), null));
_target.Write(buffer, 0, buffer.Length);
SftpSessionMock.Verify(p => p.IsOpen, Times.Exactly(1));
SftpSessionMock.Verify(p => p.RequestWrite(_handle, (ulong) _fileAttributes.Size, buffer, 0, buffer.Length, It.IsNotNull<AutoResetEvent>(), null), Times.Once);
}
[TestMethod]
public void RequestOpenOnSftpSessionShouldBeInvokedOnce()
{
SftpSessionMock.Verify(p => p.RequestOpen(_path, Flags.Read | Flags.Write | Flags.Append, false), Times.Once);
}
[TestMethod]
public void RequestFStatOnSftpSessionShouldBeInvokedOnce()
{
SftpSessionMock.Verify(p => p.RequestFStat(_handle, false), Times.Once);
Assert.IsNotNull(_actualException);
Assert.IsNull(_actualException.InnerException);
Assert.AreEqual(string.Format("{0} mode can be requested only when combined with write-only access.", _fileMode), _actualException.Message);
Assert.IsNull(_actualException.ParamName);
}
}
}
src/Renci.SshNet/Sftp/SftpFileStream.cs
+5
View File
@@ -202,6 +202,11 @@ namespace Renci.SshNet.Sftp
throw new ArgumentOutOfRangeException("access");
}
if ((access & FileAccess.Read) != 0 && mode == FileMode.Append)
{
throw new ArgumentException(string.Format("{0} mode can be requested only when combined with write-only access.", mode.ToString("G")));
}
if ((access & FileAccess.Write) == 0)
{
if (mode == FileMode.Create || mode == FileMode.CreateNew || mode == FileMode.Truncate || mode == FileMode.Append)