byte[] _CreateAlert(Alert alert)
{
var buffer = new BufferOffsetSize(2);
buffer.Buffer [0] = (byte)alert.Level;
buffer.Buffer [1] = (byte)alert.Description;
return(EncodeRecord(ContentType.Alert, buffer));
}
public BufferOffsetSize[] GetBufferArray ()
{
int count = 0;
for (var ptr = first; ptr != null; ptr = ptr.next)
count++;
var array = new BufferOffsetSize [count];
count = 0;
for (var ptr = first; ptr != null; ptr = ptr.next)
array [count++] = ptr;
return array;
}
public BufferOffsetSize GetBuffer ()
{
int totalSize = 0;
for (var ptr = first; ptr != null; ptr = ptr.next)
totalSize += ptr.Size;
var outBuffer = new BufferOffsetSize (new byte [totalSize]);
int offset = 0;
for (var ptr = first; ptr != null; ptr = ptr.next) {
Buffer.BlockCopy (ptr.Buffer, ptr.Offset, outBuffer.Buffer, offset, ptr.Size);
offset += ptr.Size;
}
return outBuffer;
}
static void EncodeRecord_internal(TlsProtocolCode protocol, ContentType contentType, CryptoParameters crypto, IBufferOffsetSize buffer, TlsStream output,
int fragmentSize = MAX_FRAGMENT_SIZE)
{
var maxExtraBytes = crypto != null ? crypto.MaxExtraEncryptedBytes : 0;
var offset = buffer.Offset;
var remaining = buffer.Size;
#if !INSTRUMENTATION
fragmentSize = MAX_FRAGMENT_SIZE;
#endif
do
{
BufferOffsetSize fragment;
var encryptedSize = crypto != null?crypto.GetEncryptedSize(remaining) : remaining;
if (encryptedSize <= fragmentSize)
{
fragment = new BufferOffsetSize(buffer.Buffer, offset, remaining);
}
else
{
fragment = new BufferOffsetSize(buffer.Buffer, offset, fragmentSize - maxExtraBytes);
encryptedSize = crypto != null?crypto.GetEncryptedSize(fragment.Size) : fragment.Size;
}
// Write tls message
output.Write((byte)contentType);
output.Write((short)protocol);
output.Write((short)encryptedSize);
if (crypto != null)
{
output.MakeRoom(encryptedSize);
var ret = crypto.Encrypt(contentType, fragment, output.GetRemaining());
output.Position += ret;
}
else
{
output.Write(fragment.Buffer, fragment.Offset, fragment.Size);
}
offset += fragment.Size;
remaining -= fragment.Size;
} while (remaining > 0);
}
public BufferOffsetSize[] GetBufferArray()
{
int count = 0;
for (var ptr = first; ptr != null; ptr = ptr.next)
{
count++;
}
var array = new BufferOffsetSize [count];
count = 0;
for (var ptr = first; ptr != null; ptr = ptr.next)
{
array [count++] = ptr;
}
return(array);
}
public BufferOffsetSize GetBuffer()
{
int totalSize = 0;
for (var ptr = first; ptr != null; ptr = ptr.next)
{
totalSize += ptr.Size;
}
var outBuffer = new BufferOffsetSize(new byte [totalSize]);
int offset = 0;
for (var ptr = first; ptr != null; ptr = ptr.next)
{
Buffer.BlockCopy(ptr.Buffer, ptr.Offset, outBuffer.Buffer, offset, ptr.Size);
offset += ptr.Size;
}
return(outBuffer);
}
public void TestDecryptWithInvalidPadding2 (TestContext ctx, [TestHost] IEncryptionTestHost host)
{
var input = GetBuffer (Data11Result);
var modified = new TlsBuffer (input.Size);
modified.Write (input.Buffer);
// Flip a bit in the last byte, this will affect the padding size.
modified.Buffer [modified.Size - 1] ^= 0x01;
input = new BufferOffsetSize (modified.Buffer, 0, modified.Size);
try {
host.Decrypt (input);
ctx.AssertFail ("#1");
} catch (Exception ex) {
ctx.Assert (ex, Is.InstanceOf<TlsException> (), "#2");
var tlsEx = (TlsException)ex;
ctx.Assert (tlsEx.Alert.Level, Is.EqualTo (AlertLevel.Fatal), "#3");
ctx.Assert (tlsEx.Alert.Description, Is.EqualTo (AlertDescription.BadRecordMAC), "#4");
}
}
public void TestDecryptWithInvalidPadding (TestContext ctx, [TestHost] IEncryptionTestHost host)
{
var input = GetBuffer (ExtraPaddingResult);
var modified = new TlsBuffer (input.Size);
modified.Write (input.Buffer);
var theOffset = modified.Size - (2 * host.BlockSize) - 5;
modified.Buffer [theOffset] ^= 0x01;
input = new BufferOffsetSize (modified.Buffer, 0, modified.Size);
try {
host.Decrypt (input);
ctx.AssertFail ("#1");
} catch (Exception ex) {
ctx.Assert (ex, Is.InstanceOf<TlsException> (), "#2");
var tlsEx = (TlsException)ex;
ctx.Assert (tlsEx.Alert.Level, Is.EqualTo (AlertLevel.Fatal), "#3");
ctx.Assert (tlsEx.Alert.Description, Is.EqualTo (AlertDescription.BadRecordMAC), "#4");
}
}
