private List <Chunk> ReadAndParseChunks()
{
List <Chunk> chunks = PNGFile.Read(FilepathTextBox.Text);
List <Chunk> parsedChunks = ChunkParser.Parse(chunks);
return(parsedChunks);
}
private void FillChunkInfo(string imagePath)
{
List <Chunk> chunks = ChunkParser.Parse(PNGFile.Read(imagePath));
string chunkInfo = GetChunksInfo(chunks);
InfoText.Text = chunkInfo;
}
public void ShouldDecipherImageWithoutFiltering()
{
string filePathToRead = @"../../../Data/square_wave_encrypted.png";
string filePathToWrite = @"../../../Data/square_wave_decrypted.png";
List <Chunk> chunks = PNGFile.Read(filePathToRead);
List <Chunk> parsedChunks = ChunkParser.Parse(chunks);
List <Chunk> decipheredChunks = imageBlockCipher.DecipherWithoutFiltering(parsedChunks);
PNGFile.Write(filePathToWrite, decipheredChunks);
}
public void ShouldParseChunks()
{
string filePath = @"../../../Data/kostki.png";
List <Chunk> chunks = PNGFile.Read(filePath);
List <Chunk> result = ChunkParser.Parse(chunks);
cHRM expected = new cHRM(PNGFile.Read(filePath)[2]);
cHRM chrm = (cHRM)result[2];
Assert.AreEqual(expected.WhitePointX, chrm.WhitePointX);
}
public void ShouldCipherLenaImageWithoutFiltering()
{
string filePathToRead = @"../../../Data/Lena.png";
string filePathToWrite = @"../../../Data/Lena_encrypted.png";
List <Chunk> chunks = PNGFile.Read(filePathToRead);
List <Chunk> parsedChunks = ChunkParser.Parse(chunks);
List <Chunk> cipheredChunks = imageBlockCipher.CipherWithoutFiltering(parsedChunks);
PNGFile.Write(filePathToWrite, cipheredChunks);
}
public void ShouldConcatAndThenSplitImage()
{
string filePath = @"../../../Data/lena.png";
List <Chunk> chunks = PNGFile.Read(filePath);
List <Chunk> parsedChunks = ChunkParser.Parse(chunks);
int firstIdatIndex = parsedChunks.TakeWhile(chunk => !IsIDAT(chunk)).Count();
List <IDAT> idats = parsedChunks.Where(IsIDAT).Select(chunk => (IDAT)chunk).ToList();
byte[] bytes = IDATConverter.ConcatToBytes(idats);
List <Chunk> resultIdats = IDATConverter.SplitToIDATs(bytes).Select(idat => (Chunk)idat).ToList();
List <Chunk> resultChunks = parsedChunks.Where(chunk => !IsIDAT(chunk)).ToList();
resultChunks.InsertRange(firstIdatIndex, resultIdats);
PNGFile.Write(@"../../../Data/lenaConverted.png", resultChunks);
}
