public async Task EmbedMessage(
string fileInputLocation,
string fileOutputLocation,
string message,
string password)
{
try
{
ConsoleLogger.LogMessage("Creating encoder instance...");
ImageEncoder imageEncoder = new ImageEncoder(
format: ImageFormat.Png,
encryptionConfiguration: new EncryptionConfiguration(EncryptionType.Aes256, 20000),
compressionConfiguration: new CompressionConfiguration(CompressionType.Gzip, CompressionLevel.Standard),
embeddedImage: new EmbeddedImage(Image.FromFile(fileInputLocation), EmbeddedImage.PixelStorage.Auto)
);
ConsoleLogger.LogMessage("Reading message bytes...");
byte[] contentBytes = Encoding.UTF8.GetBytes(message);
string outputDirectory = Path.GetDirectoryName(fileOutputLocation);
if (!Directory.Exists(outputDirectory))
{
Directory.CreateDirectory(outputDirectory);
}
ConsoleLogger.LogMessage("Appending message bytes into a memory stream...");
MemoryStream contentStream = new MemoryStream();
await contentStream.WriteAsync(contentBytes, 0, contentBytes.Length);
ConsoleLogger.LogMessage("Adding memory stream object into encoder...");
imageEncoder.AddDirectory(new Input.Directory("\\", new[]
{
new Input.File("__payload__.bin", contentStream)
}));
using (FileStream outputStream = new FileStream(fileOutputLocation, FileMode.OpenOrCreate, FileAccess.ReadWrite))
{
ConsoleLogger.LogMessage("Encoding data into target image...");
ConsoleLogger.LogMessage("Creating output image...");
await imageEncoder.SaveAsync(
outputStream : outputStream,
encodingConfiguration : new EncodingConfiguration
(
password: password,
tempStorageProvider: new MemoryStorageProvider(),
bufferSize: 81920,
fileGroupSize: 1024 * 1024
));
ConsoleLogger.LogMessage($"Operation succeeded. File saved at {fileOutputLocation}");
}
}
catch (Exception ex)
{
ConsoleLogger.ShowErrorMessage(ex.Message);
}
}
public async Task EmbedFiles(
string fileInputLocation,
string fileOutputLocation,
string[] fileAttachments,
string password)
{
try
{
ConsoleLogger.LogMessage("Creating encoder instance...");
ImageEncoder imageEncoder = new ImageEncoder(
format: ImageFormat.Png,
encryptionConfiguration: new EncryptionConfiguration(EncryptionType.Aes256, 20000),
compressionConfiguration: new CompressionConfiguration(CompressionType.Gzip, CompressionLevel.Standard),
embeddedImage: new EmbeddedImage(Image.FromFile(fileInputLocation), EmbeddedImage.PixelStorage.Auto)
);
string outputDirectory = Path.GetDirectoryName(fileOutputLocation);
if (!Directory.Exists(outputDirectory))
{
Directory.CreateDirectory(outputDirectory);
}
string attachmentDirectory = Path.GetDirectoryName(fileAttachments.FirstOrDefault());
ConsoleLogger.LogMessage("Adding file(s) into encoder instance...");
List <Input.File> files = new List <Input.File>();
foreach (string file in fileAttachments)
{
files.Add(new Input.File(new System.IO.FileInfo(file)));
}
imageEncoder.AddDirectory(new Input.Directory("\\", files));
using (FileStream outputStream = new FileStream(fileOutputLocation, FileMode.OpenOrCreate, FileAccess.ReadWrite))
{
ConsoleLogger.LogMessage("Encoding data into target image...");
ConsoleLogger.LogMessage("Creating output image...");
await imageEncoder.SaveAsync(
outputStream : outputStream,
encodingConfiguration : new EncodingConfiguration
(
password: password,
tempStorageProvider: new MemoryStorageProvider(),
bufferSize: 81920,
fileGroupSize: 1024 * 1024
));
ConsoleLogger.LogMessage($"Operation succeeded. File saved at {fileOutputLocation}");
}
}
catch (Exception ex)
{
ConsoleLogger.ShowErrorMessage(ex.ToString());
}
}
private async Task CreateVersionCompatData(
ImageFormat format,
FileInfo inputZipFIle,
EncryptionConfiguration encryption,
CompressionConfiguration compression,
EmbeddedImage embeddedImage)
{
var inputFileName = Path.GetFileNameWithoutExtension(inputZipFIle.Name);
string outputName = inputFileName.Substring(0, Math.Min(inputFileName.Length, 10)) + "-" + Enum.GetName(typeof(ImageFormat), format);
if (embeddedImage != null)
{
outputName += "-E";
}
if (encryption != null)
{
outputName += "-" + Enum.GetName(typeof(EncryptionType), encryption.Type).Substring(0, 3);
}
if (compression != null)
{
outputName += "-" + Enum.GetName(typeof(CompressionType), compression.Type).Substring(0, 3);
}
var tempInputDataDirectory = _ouputTempVersionDataDirectory.CreateSubdirectory(outputName + "_original_data");
using (var zipFile = ZipFile.Read(inputZipFIle.FullName))
{
zipFile.ExtractAll(tempInputDataDirectory.FullName);
}
DirectoryInfo outputDirectory = _ouputTempVersionDataDirectory.CreateSubdirectory(outputName);
var encoder = new ImageEncoder(format, encryption, compression, embeddedImage);
using (Stream encodedImageFile = File.Create(Path.Combine(outputDirectory.FullName, inputFileName + "." + encoder.Extension)))
{
encoder.AddDirectory(tempInputDataDirectory);
await encoder.SaveAsync(encodedImageFile, new EncodingConfiguration(
password : "******",
tempStorageProvider : new MemoryStorageProvider(),
bufferSize : 4096,
fileGroupSize : 1024 * 500));
inputZipFIle.CopyTo(Path.Combine(outputDirectory.FullName, "Original_Data.zip"), true);
}
tempInputDataDirectory.Delete(true);
}
public async Task EncodingThenDecoding_ProducesEquivalentResults(
ImageFormat format,
FileInfo inputZipFile,
EncryptionConfiguration encryption,
CompressionConfiguration compression,
EmbeddedImage embeddedImage,
IDictionary <string, string> metadata)
{
DirectoryInfo inputDirectory = null;
DirectoryInfo outputDirectory = null;
try
{
using (var storageStream = new MemoryStream())
{
inputDirectory = _inputRootDirectory.CreateSubdirectory(Path.GetFileNameWithoutExtension(inputZipFile.Name));
using (var zipFile = ZipFile.Read(inputZipFile.FullName))
{
zipFile.ExtractAll(inputDirectory.FullName);
}
var encoder = new ImageEncoder(format, encryption, compression, embeddedImage);
encoder.Metadata = metadata;
encoder.AddDirectory(inputDirectory);
await encoder.SaveAsync(storageStream, ImageConfigurations.EncodingConfiguration);
storageStream.Position = 0;
var decoder = await ImageDecoder.LoadAsync(storageStream, ImageConfigurations.DecodingConfiguration);
outputDirectory = _ouputRootDirectory.CreateSubdirectory(inputDirectory.Name);
await decoder.DecodeAsync(outputDirectory);
AssertEx.AreEqualByJson(metadata, decoder.Metadata);
DirectoryAssert.AreEquivalent(inputDirectory, outputDirectory);
}
}
finally
{
foreach (var directory in new[] { inputDirectory, outputDirectory })
{
if (directory != null)
{
directory.Delete(true);
}
}
}
}
