//GET-query to http://127.0.0.1:7346/api/run-nbpack/-u|upload%2FMORE-secrets-inside.png|nano3|upload%2Fposts.json
//or POST-query to http://127.0.0.1:7346/api/run-nbpack/ with four parameters - saving the JSON-file.
//dataURL of PNG is supporting in containerPath.
private static void Unpack(string containerPath, string key, string outputPath)
{
try
{
var encrypted = new PngStegoUtil().ReadHiddenBytesFromPng(containerPath);
var decrypted = ByteEncryptionUtil.DecryptSalsa20(encrypted, key);
var nposts = NanoPostPackUtil.Unpack(decrypted);
var posts = nposts.Select(
np => new NDB.Post
{
replyto = np.SerializedString().Substring(0, 32),
message = Convert.ToBase64String(Encoding.UTF8.GetBytes(np.SerializedString().Substring(32)))
}).ToArray();
Validate(posts);
//from the sources of client 3.1
for (int i = 0; i < posts.Length; i++)
{
posts[i].message = NDB.PostsValidator.FromB64(posts[i].message);
}
var result = JsonConvert.SerializeObject(posts, Formatting.Indented);
File.WriteAllText(outputPath, result);
}
catch
{
var posts = new Posts();
posts.posts = new Post[0];
var result = JsonConvert.SerializeObject(posts);
File.WriteAllText(outputPath, result);
}
return;
}
public static NDB.Post[] Unpack(Image container, string key) //this Unpack using Image from RAM, as parameter.
{
try
{
//Console.WriteLine("Start read hidden bytes");
var encrypted = new PngStegoUtil().ReadHiddenBytesFromPng(container); //here can be catch
//Console.WriteLine("readhiddenbytesFromPNG..........");
var decrypted = ByteEncryptionUtil.DecryptSalsa20(encrypted, key); //here can be catch
//Console.WriteLine("decrypted...........");
var nposts = NanoPostPackUtil.Unpack(decrypted); //here can be catch
//Console.WriteLine("nposts...........");
var posts = nposts.Select( //here can be catch
np => new NDB.Post
{
replyto = np.SerializedString().Substring(0, 32),
message = Convert.ToBase64String(Encoding.UTF8.GetBytes(np.SerializedString().Substring(32)))
}).ToArray();
//Console.WriteLine("posts...........");
Validate(posts); //AND HERE reason of for lagging containers
//Console.WriteLine("Validate...........");
return(posts);
}
catch // (Exception e) fix compile warning
{
//Console.WriteLine("Unpack catch"); //here can be catch.
return(new NDB.Post[0]);
}
}
private static void Pack(string postsPath, string templatePath, string key, string outputPath)
{
var json = File.ReadAllText(postsPath);
var posts = JsonConvert.DeserializeObject <NDB.Post[]>(json);
Validate(posts);
var nposts = new List <NanoPost>();
foreach (var p in posts)
{
nposts.Add(new NanoPost(p.replyto + Encoding.UTF8.GetString(Convert.FromBase64String(p.message))));
}
var packed = NanoPostPackUtil.Pack(nposts.ToArray());
var encrypted = ByteEncryptionUtil.EncryptSalsa20(packed, key);
Image bmp;
if (
templatePath.IndexOf("data:") != -1 &&
templatePath.IndexOf("base64,") != -1 &&
nbpack.NBPackMain.IsBase64Encoded(templatePath.Split(',')[1])
)
{
Console.WriteLine("Image uploaded and dataURL found. Create bitmap from dataURL.");
//create bitmap from dataURL, and save this as PNG-file to Upload folder.
var base64Data = Regex.Match(templatePath, @"data:image/(?<type>.+?),(?<data>.+)").Groups["data"].Value;
var binData = Convert.FromBase64String(base64Data);
using (var stream = new MemoryStream(binData))
{
bmp = new Bitmap(stream); //create image from dataURL
//save this image as PNG-file to the folder "upload"
//Console.WriteLine(bmp);
//bmp.Save("upload/" + Guid.NewGuid().ToString() + ".png", ImageFormat.Png);
//bmp.Dispose();
//Console.WriteLine("saved to \"upload\"");
}
//working...
}
else
{
Console.WriteLine("DataURL not found. Create bitmap from templatePath = {0}", templatePath);
bmp = Bitmap.FromFile(templatePath);
}
var capacity = (bmp.Width * bmp.Height * 3) / 8 - 32;
if (encrypted.Length > capacity)
{
float scale = (encrypted.Length / (float)capacity);
Console.WriteLine("Warning: scaling image to increase capacity: " + scale.ToString("n2") + "x");
scale = (float)Math.Sqrt(scale);
bmp = new Bitmap(bmp, (int)(bmp.Width * scale + 1), (int)(bmp.Height * scale + 1));
}
new PngStegoUtil().HideBytesInPng(bmp, outputPath, encrypted);
return;
}
public string AddSignatureToThePost(string post, string guess)
{
var dec_seed = ByteEncryptionUtil.WrappedXor(_encryptedSeed, guess + _publicKey.Stringify());
var privateKey = Ed25519.ExpandedPrivateKeyFromSeed(dec_seed);
var signature = Ed25519.Sign(Encoding.UTF8.GetBytes(post), privateKey);
return(post + "[" + SignatureTag + "=" + signature.Stringify() + "]");
}
public bool CheckGuess(string guess)
{
var dec_seed = ByteEncryptionUtil.WrappedXor(_encryptedSeed, guess + _publicKey.Stringify());
var privateKey = Ed25519.ExpandedPrivateKeyFromSeed(dec_seed);
var dummyMessage = new byte[] { (byte)0 };
var signature = Ed25519.Sign(dummyMessage, privateKey);
return(Ed25519.Verify(signature, dummyMessage, _publicKey));
}
//GET-query to http://127.0.0.1:7346/api/run-nbpack/-u|upload%2FMORE-secrets-inside.png|nano3
//or POST-query to http://127.0.0.1:7346/api/run-nbpack/ with three two parameters - return JSON.
//dataURL of PNG is supporting in containerPath.
public static NDB.Post[] Unpack(string containerPath, string key) //containerPath - pathway to container, as file
{
try
{
//Console.WriteLine("Start read hidden bytes");
var encrypted = new PngStegoUtil().ReadHiddenBytesFromPng(containerPath);
//Console.WriteLine("readhiddenbytesFromPNG..........");
var decrypted = ByteEncryptionUtil.DecryptSalsa20(encrypted, key); //here is reason of catch for some files
//Console.WriteLine("decrypted...........");
var nposts = NanoPostPackUtil.Unpack(decrypted); //or here
//Console.WriteLine("nposts...........");
var posts = nposts.Select( //or here
np => new NDB.Post
{
replyto = np.SerializedString().Substring(0, 32),
message = Convert.ToBase64String(Encoding.UTF8.GetBytes(np.SerializedString().Substring(32)))
}).ToArray();
//Console.WriteLine("posts...........");
Validate(posts); //in the most cases this not working, then catch
//Console.WriteLine("Validate...........");
return(posts);
}
catch // (Exception e) //fix compile warning
{
Console.WriteLine("Unpack catch: " +
(
(containerPath.IndexOf("data:") != -1 &&
containerPath.IndexOf("base64,") != -1 &&
nbpack.NBPackMain.IsBase64Encoded(containerPath.Split(',')[1])
)
? containerPath.Substring(0, 40) + "..."
: containerPath
)
); //here catch for some files.
return(new NDB.Post[0]);
}
}
private static void Pack(NDB.Post[] posts, string templatePath, string key, string outputPath, string address = "")
{
var @set = new HashSet <string>();
Validate(posts);
var nposts = new List <NanoPost>();
string add_notif = ((address == "CreatePNG_on_lite_server")?address + ". ":"") + "Showing posts that will go to the container:";
//NServer.NotificationHandler.Instance.Messages.Enqueue(add_notif); //do not add notif, and add this from response.
NServer.DbApiHandler.notifications_with_filename += add_notif + "|||";
foreach (var p in posts)
{
var mess = Encoding.UTF8.GetString(Convert.FromBase64String(p.message));
var hash = p.hash;
if ([email protected](hash))
{
@set.Add(hash); /*add_notif = ((address == "CreatePNG_on_lite_server")?address+". ":"")+mess; //do not define this, because nothing to do with this.
* NServer.NotificationHandler.Instance.Messages.Enqueue(add_notif); //do not add notif, and add this from response*/ /* NServer.DbApiHandler.notifications_with_filename += add_notif + "|||";// don't add posts-content - to returned string */
}
nposts.Add(new NanoPost(p.replyto + mess));
}
var packed = NanoPostPackUtil.Pack(nposts.ToArray());
var encrypted = ByteEncryptionUtil.EncryptSalsa20(packed, key);
Image bmp;
if (
templatePath.IndexOf("data:") != -1 &&
templatePath.IndexOf("base64,") != -1 &&
nbpack.NBPackMain.IsBase64Encoded(templatePath.Split(',')[1])
)
{
Console.WriteLine("Image uploaded and dataURL found. Create bitmap from dataURL.");
//create bitmap from dataURL, and save this as PNG-file to Upload folder.
var base64Data = Regex.Match(templatePath, @"data:image/(?<type>.+?),(?<data>.+)").Groups["data"].Value;
var binData = Convert.FromBase64String(base64Data);
using (var stream = new MemoryStream(binData))
{
bmp = new Bitmap(stream); //create image from dataURL
//save this image as PNG-file to the folder "upload"
//Console.WriteLine(bmp);
//bmp.Save("upload/" + Guid.NewGuid().ToString() + ".png", ImageFormat.Png);
//bmp.Dispose();
//Console.WriteLine("saved to \"upload\"");
}
//working...
}
else
{
//Console.WriteLine("DataURL not found. Create bitmap from templatePath = {0}", templatePath);
bmp = Bitmap.FromFile(templatePath);
}
var capacity = (bmp.Width * bmp.Height * 3) / 8 - 32;
if (encrypted.Length > capacity)
{
float scale = (encrypted.Length / (float)capacity);
Console.WriteLine("Warning: scaling image to increase capacity: " + scale.ToString("n2") + "x");
scale = (float)Math.Sqrt(scale);
bmp = new Bitmap(bmp, (int)(bmp.Width * scale + 1), (int)(bmp.Height * scale + 1));
}
new PngStegoUtil().HideBytesInPng(bmp, outputPath, encrypted);
return;
}
