public void EncryptSegments()
{
var ciphertextActual = new byte[_plaintext.Length + XSalsa20Poly1305.MacSizeInBytes].Pad();
XSalsa20Poly1305.Encrypt(ciphertextActual, _plaintext.Pad(), _key.Pad(), _nonce.Pad());
TestHelpers.AssertEqualBytes(_ciphertext, ciphertextActual.UnPad());
}
PullMsgResult ProduceWelcome(ref Msg msg)
{
Span <byte> cookieNonce = stackalloc byte[Curve25519XSalsa20Poly1305.NonceLength];
Span <byte> cookiePlaintext = stackalloc byte[64];
Span <byte> cookieCiphertext = stackalloc byte[64 + XSalsa20Poly1305.TagLength];
// Create full nonce for encryption
// 8-byte prefix plus 16-byte random nonce
CookieNoncePrefix.CopyTo(cookieNonce);
using var rng = RandomNumberGenerator.Create();
#if NETSTANDARD2_1
rng.GetBytes(cookieNonce.Slice(8));
#else
byte[] temp = new byte[16];
rng.GetBytes(temp);
temp.CopyTo(cookieNonce.Slice(8));
#endif
// Generate cookie = Box [C' + s'](t)
m_cnClientKey.CopyTo(cookiePlaintext);
m_cnSecretKey.CopyTo(cookiePlaintext.Slice(32));
// Generate fresh cookie key
rng.GetBytes(m_cookieKey);
// Encrypt using symmetric cookie key
using var secretBox = new XSalsa20Poly1305(m_cookieKey);
secretBox.Encrypt(cookieCiphertext, cookiePlaintext, cookieNonce);
cookiePlaintext.Clear();
Span <byte> welcomeNonce = stackalloc byte[Curve25519XSalsa20Poly1305.NonceLength];
Span <byte> welcomePlaintext = stackalloc byte[128];
Span <byte> welcomeCiphertext = stackalloc byte[128 + Curve25519XSalsa20Poly1305.TagLength];
// Create full nonce for encryption
// 8-byte prefix plus 16-byte random nonce
WelcomeNoncePrefix.CopyTo(welcomeNonce);
#if NETSTANDARD2_1
rng.GetBytes(welcomeNonce.Slice(8));
#else
rng.GetBytes(temp);
temp.CopyTo(welcomeNonce.Slice(8));
#endif
// Create 144-byte Box [S' + cookie](S->C')
m_cnPublicKey.CopyTo(welcomePlaintext);
cookieNonce.Slice(8).CopyTo(welcomePlaintext.Slice(32));
cookieCiphertext.CopyTo(welcomePlaintext.Slice(48));
using var box = new Curve25519XSalsa20Poly1305(m_secretKey, m_cnClientKey);
box.Encrypt(welcomeCiphertext, welcomePlaintext, welcomeNonce);
welcomePlaintext.Clear();
msg.InitPool(168); // TODO: we can save some allocation here by allocating this earlier
Span <byte> welcome = msg;
WelcomeLiteral.CopyTo(welcome);
welcomeNonce.Slice(8, 16).CopyTo(welcome.Slice(8));
welcomeCiphertext.CopyTo(welcome.Slice(24));
return(PullMsgResult.Ok);
}
public void RoundTripSuccessWithManyLengths()
{
for (int length = 0; length < 1000; length++)
{
var plaintextExpected = Enumerable.Range(0, length).Select(i => (byte)i).ToArray();
var ciphertext = XSalsa20Poly1305.Encrypt(plaintextExpected.ToArray(), _key, _nonce);
var plaintextActual = XSalsa20Poly1305.TryDecrypt(ciphertext, _key, _nonce);
TestHelpers.AssertEqualBytes(plaintextExpected, plaintextActual);
}
}
public void RoundTripFailWithManyLengths()
{
for (int length = 0; length < 130; length++)//130 bytes exceeds two blocks
{
var originalPlaintext = Enumerable.Range(0, length).Select(i => (byte)i).ToArray();
var ciphertext = XSalsa20Poly1305.Encrypt(originalPlaintext.ToArray(), _key, _nonce);
foreach (var brokenCiphertext in ciphertext.WithChangedBit())
{
var plaintextActual = XSalsa20Poly1305.TryDecrypt(brokenCiphertext, _key, _nonce);
Assert.AreEqual(null, plaintextActual);
}
}
}
public void RoundTripSuccessWithManyLengthsSegments()
{
for (int length = 0; length < 1000; length++)
{
var plaintextExpected = Enumerable.Range(0, length).Select(i => (byte)i).ToArray();
var ciphertext = new byte[plaintextExpected.Length + XSalsa20Poly1305.MacSizeInBytes].Pad();
var plaintextActual = new byte[plaintextExpected.Length].Pad();
XSalsa20Poly1305.Encrypt(ciphertext, plaintextExpected.ToArray().Pad(), _key.Pad(), _nonce.Pad());
ciphertext.UnPad();//verify padding
XSalsa20Poly1305.TryDecrypt(plaintextActual, ciphertext, _key.Pad(), _nonce.Pad());
TestHelpers.AssertEqualBytes(plaintextExpected, plaintextActual.UnPad());
}
}
public void TestPerformanceSmallPayload()
{
var firstkey = new byte[]
{
0x1b, 0x27, 0x55, 0x64, 0x73, 0xe9, 0x85,
0xd4, 0x62, 0xcd, 0x51, 0x19, 0x7a, 0x9a,
0x46, 0xc7, 0x60, 0x09, 0x54, 0x9e, 0xac,
0x64, 0x74, 0xf2, 0x06, 0xc4, 0xee, 0x08,
0x44, 0xf6, 0x83, 0x89
};
var nonce = new byte[]
{
0x69, 0x69, 0x6e, 0xe9, 0x55, 0xb6,
0x2b, 0x73, 0xcd, 0x62, 0xbd, 0xa8,
0x75, 0xfc, 0x73, 0xd6, 0x82, 0x19,
0xe0, 0x03, 0x6b, 0x7a, 0x0b, 0x37
};
var message = new byte[128];
message[0] = 1;
var message2 = new byte[message.Length];
var cipher = new byte[message.Length + XSalsa20Poly1305.TagLength];
var xSalsa20Poly1305 = new XSalsa20Poly1305(firstkey);
var sw = Stopwatch.StartNew();
int counter = 0;
do
{
xSalsa20Poly1305.Encrypt(cipher, message, nonce);
xSalsa20Poly1305.TryDecrypt(message2, cipher, nonce);
counter++;
} while (sw.ElapsedMilliseconds < 10000);
Console.WriteLine("iterations " + counter);
}
public void TestPerformance()
{
var firstkey = new byte[]
{
0x1b, 0x27, 0x55, 0x64, 0x73, 0xe9, 0x85,
0xd4, 0x62, 0xcd, 0x51, 0x19, 0x7a, 0x9a,
0x46, 0xc7, 0x60, 0x09, 0x54, 0x9e, 0xac,
0x64, 0x74, 0xf2, 0x06, 0xc4, 0xee, 0x08,
0x44, 0xf6, 0x83, 0x89
};
var nonce = new byte[]
{
0x69, 0x69, 0x6e, 0xe9, 0x55, 0xb6,
0x2b, 0x73, 0xcd, 0x62, 0xbd, 0xa8,
0x75, 0xfc, 0x73, 0xd6, 0x82, 0x19,
0xe0, 0x03, 0x6b, 0x7a, 0x0b, 0x37
};
var message = new byte[1000000];
message[0] = 1;
var message2 = new byte[message.Length];
var cipher = new byte[message.Length + XSalsa20Poly1305.TagLength];
var xSalsa20Poly1305 = new XSalsa20Poly1305(firstkey);
var sw = Stopwatch.StartNew();
for (int i = 0; i < 100; i++)
{
xSalsa20Poly1305.Encrypt(cipher, message, nonce);
xSalsa20Poly1305.TryDecrypt(message2, cipher, nonce);
}
Console.WriteLine("Encrypt + Decrypt took " + sw.ElapsedMilliseconds);
Assert.AreEqual(message, message2);
}
public void Test1()
{
var firstkey = new byte[]
{
0x1b, 0x27, 0x55, 0x64, 0x73, 0xe9, 0x85,
0xd4, 0x62, 0xcd, 0x51, 0x19, 0x7a, 0x9a,
0x46, 0xc7, 0x60, 0x09, 0x54, 0x9e, 0xac,
0x64, 0x74, 0xf2, 0x06, 0xc4, 0xee, 0x08,
0x44, 0xf6, 0x83, 0x89
};
var nonce = new byte[]
{
0x69, 0x69, 0x6e, 0xe9, 0x55, 0xb6,
0x2b, 0x73, 0xcd, 0x62, 0xbd, 0xa8,
0x75, 0xfc, 0x73, 0xd6, 0x82, 0x19,
0xe0, 0x03, 0x6b, 0x7a, 0x0b, 0x37
};
var message = new byte[]
{
0xbe, 0x07, 0x5f, 0xc5, 0x3c, 0x81, 0xf2, 0xd5, 0xcf, 0x14, 0x13, 0x16,
0xeb, 0xeb, 0x0c, 0x7b, 0x52, 0x28, 0xc5, 0x2a, 0x4c, 0x62, 0xcb, 0xd4,
0x4b, 0x66, 0x84, 0x9b, 0x64, 0x24, 0x4f, 0xfc, 0xe5, 0xec, 0xba, 0xaf,
0x33, 0xbd, 0x75, 0x1a, 0x1a, 0xc7, 0x28, 0xd4, 0x5e, 0x6c, 0x61, 0x29,
0x6c, 0xdc, 0x3c, 0x01, 0x23, 0x35, 0x61, 0xf4, 0x1d, 0xb6, 0x6c, 0xce,
0x31, 0x4a, 0xdb, 0x31, 0x0e, 0x3b, 0xe8, 0x25, 0x0c, 0x46, 0xf0, 0x6d,
0xce, 0xea, 0x3a, 0x7f, 0xa1, 0x34, 0x80, 0x57, 0xe2, 0xf6, 0x55, 0x6a,
0xd6, 0xb1, 0x31, 0x8a, 0x02, 0x4a, 0x83, 0x8f, 0x21, 0xaf, 0x1f, 0xde,
0x04, 0x89, 0x77, 0xeb, 0x48, 0xf5, 0x9f, 0xfd, 0x49, 0x24, 0xca, 0x1c,
0x60, 0x90, 0x2e, 0x52, 0xf0, 0xa0, 0x89, 0xbc, 0x76, 0x89, 0x70, 0x40,
0xe0, 0x82, 0xf9, 0x37, 0x76, 0x38, 0x48, 0x64, 0x5e, 0x07, 0x05
};
var expected = new byte[]
{
0xf3, 0xff, 0xc7, 0x70, 0x3f, 0x94, 0x00, 0xe5, 0x2a, 0x7d, 0xfb, 0x4b, 0x3d, 0x33, 0x05, 0xd9, 0x8e,
0x99, 0x3b, 0x9f, 0x48, 0x68, 0x12, 0x73, 0xc2, 0x96, 0x50, 0xba, 0x32, 0xfc, 0x76, 0xce, 0x48, 0x33,
0x2e, 0xa7, 0x16, 0x4d, 0x96, 0xa4, 0x47, 0x6f, 0xb8, 0xc5, 0x31, 0xa1, 0x18, 0x6a, 0xc0, 0xdf, 0xc1,
0x7c, 0x98, 0xdc, 0xe8, 0x7b, 0x4d, 0xa7, 0xf0, 0x11, 0xec, 0x48, 0xc9, 0x72, 0x71, 0xd2, 0xc2, 0x0f,
0x9b, 0x92, 0x8f, 0xe2, 0x27, 0x0d, 0x6f, 0xb8, 0x63, 0xd5, 0x17, 0x38, 0xb4, 0x8e, 0xee, 0xe3, 0x14,
0xa7, 0xcc, 0x8a, 0xb9, 0x32, 0x16, 0x45, 0x48, 0xe5, 0x26, 0xae, 0x90, 0x22, 0x43, 0x68, 0x51, 0x7a,
0xcf, 0xea, 0xbd, 0x6b, 0xb3, 0x73, 0x2b, 0xc0, 0xe9, 0xda, 0x99, 0x83, 0x2b, 0x61, 0xca, 0x01, 0xb6,
0xde, 0x56, 0x24, 0x4a, 0x9e, 0x88, 0xd5, 0xf9, 0xb3, 0x79, 0x73, 0xf6, 0x22, 0xa4, 0x3d, 0x14, 0xa6,
0x59, 0x9b, 0x1f, 0x65, 0x4c, 0xb4, 0x5a, 0x74, 0xe3, 0x55, 0xa5
};
var cipher = new byte[message.Length + XSalsa20Poly1305.TagLength];
XSalsa20Poly1305 xSalsa20Poly1305 = new XSalsa20Poly1305(firstkey);
xSalsa20Poly1305.Encrypt(cipher, message, nonce);
Assert.AreEqual(expected, cipher);
var message2 = new byte[message.Length];
var result = xSalsa20Poly1305.TryDecrypt(message2, cipher, nonce);
Assert.AreEqual(message, message2);
Assert.IsTrue(result);
}
public static byte[] EncryptSymmetric(byte[] message, byte[] nonce, byte[] sharedKey)
{
return(XSalsa20Poly1305.Encrypt(message, sharedKey, nonce));
}
public (byte[] ciphertext, byte[] nonce) Encrypt(byte[] plaintext, byte[] key, byte[] nonce = default)
{
nonce ??= PrivateKey.GetSecureRandomeBytes(XSalsa20Poly1305.NonceSizeInBytes);
return(XSalsa20Poly1305.Encrypt(plaintext, key, nonce), nonce);
}
public static long EncryptFile(System.IO.FileInfo SourceFile, FileStream DestinationFile, string[] Recipients, Keys SenderKeys)
{
// crypto variables
// THESE SHOULD BE RANDOM!
byte[] fileNonce = Utilities.GenerateRandomBytes(16);
byte[] fileKey = Utilities.GenerateRandomBytes(32);
Keys ephemeral = new Keys(true);
// these are dependant on recipients
byte[] sharedKey = null;
// validate parameters
//process chunks
Blake2sCSharp.Hasher b2s = Blake2sCSharp.Blake2S.Create();
UTF8Encoding utf8 = new UTF8Encoding();
// use cache file instead of a memory stream to conserve used memory MemoryStream ms = new MemoryStream(); // processed chunks go here
string tempFile = null;
FileStream cacheFs = GetTempFileStream(out tempFile);
FileStream fs = new FileStream(SourceFile.FullName, FileMode.Open, FileAccess.Read);
long fileCursor = 0;
byte[] chunk = null;
UInt64 chunkCount = 0;
byte[] chunkNonce = new byte[24]; // always a constant length
// this part of the nonce doesn't change
Array.Copy(fileNonce, chunkNonce, fileNonce.Length); // copy it once and be done with it
do
{
if (chunkCount == 0) // first chunk is always '\0'-padded filename
{
chunk = new byte[256];
byte[] filename = utf8.GetBytes(SourceFile.Name);
Array.Copy(filename, chunk, filename.Length);
filename.Wipe(); // DON'T LEAK!!!
}
else
{
if (fileCursor + MAX_CHUNK_SIZE >= SourceFile.Length)
{
// last chunk
chunkNonce[23] |= 0x80;
chunk = new byte[SourceFile.Length - fileCursor];
}
else
{
chunk = new byte[MAX_CHUNK_SIZE];
}
if (fs.Read(chunk, 0, chunk.Length) != chunk.Length)
{
// read error!
fs.Close();
fs.Dispose();
TrashTempFileStream(cacheFs, tempFile);
throw new System.IO.IOException("Abrupt end of file / read error from source.");
}
fileCursor += chunk.Length;
}
byte[] outBuffer = XSalsa20Poly1305.Encrypt(chunk, fileKey, chunkNonce);
byte[] chunkLengthBytes = Utilities.UInt32ToBytes((uint)chunk.Length);
cacheFs.Write(chunkLengthBytes, 0, 4); // use cache file
b2s.Update(chunkLengthBytes); // hash as we go
cacheFs.Write(outBuffer, 0, outBuffer.Length); // use cache file
b2s.Update(outBuffer); // hash as we go
// since the first chunkNonce is just the fileNonce and a bunch of 0x00's,
// it's safe to do the chunk counter as a post-process update
Utilities.UInt64ToBytes(++chunkCount, chunkNonce, 16);
} while (fileCursor < SourceFile.Length);
cacheFs.Flush(true); // make sure everything is flushed to the disk cache
cacheFs.Position = 0; // leave it open so that we can read it back into the destination
// get the ciphertext hash for the header
byte[] cipherTextHash = b2s.Finish();
// done encrypting to the cache, now to build the header
//build header (fileInfo needed first, but same for all recipients)...
FileInfo fi = new FileInfo(
fileKey.ToBase64String(),
fileNonce.ToBase64String(),
cipherTextHash.ToBase64String());
byte[] fiBytes = utf8.GetBytes(fi.ToJSON()); // encrypt this to the recipients next...
//build inner headers next (one for each recipient)
Dictionary <string, string> innerHeaders = new Dictionary <string, string>(Recipients.Length);
foreach (string recip in Recipients)
{
// each recipient is not identified in the outer header, only a random NONCE
byte[] recipientNonce = Utilities.GenerateRandomBytes(24);
sharedKey = // INNER SHARED KEY (Sender Secret + Recipient Public)
SenderKeys.GetShared(recip);
InnerHeaderInfo ih = new InnerHeaderInfo(
SenderKeys.PublicID,
recip,
XSalsa20Poly1305.Encrypt(fiBytes, sharedKey, recipientNonce).ToBase64String()); // fileInfo JSON object encrypted, Base64
sharedKey = // OUTER SHARED KEY (Ephemeral Secret + Recipient Public)
ephemeral.GetShared(recip);
string encryptedInnerHeader = ih.ToJSON();
encryptedInnerHeader = XSalsa20Poly1305.Encrypt(utf8.GetBytes(encryptedInnerHeader), sharedKey, recipientNonce).ToBase64String();
innerHeaders.Add(recipientNonce.ToBase64String(), encryptedInnerHeader);
}
// finally the outer header, ready for stuffing into the file
HeaderInfo hi = new HeaderInfo(1, ephemeral.PublicKey.ToBase64String(), innerHeaders);
string fileHeader = hi.ToJSON();
// build the final file...
DestinationFile.Write(utf8.GetBytes("miniLock"), 0, 8); // file identifier (aka "magic bytes")
DestinationFile.Write(Utilities.UInt32ToBytes((uint)fileHeader.Length), 0, 4); // header length in 4 little endian bytes
DestinationFile.Write(utf8.GetBytes(fileHeader), 0, fileHeader.Length); // the full JSON header object
// read back from the cache file into the destination file...
byte[] buffer;
for (int i = 0; i < cacheFs.Length; i += buffer.Length)
{
if (i + MAX_CHUNK_SIZE >= cacheFs.Length)
{
buffer = new byte[cacheFs.Length - i];
}
else
{
buffer = new byte[MAX_CHUNK_SIZE];
}
if (cacheFs.Read(buffer, 0, buffer.Length) != buffer.Length)
{
throw new System.IO.IOException("Abrupt end of cache file");
}
DestinationFile.Write(buffer, 0, buffer.Length); // the ciphertext
}
// now flush and close, and grab length for reporting to caller
DestinationFile.Flush();
long tempOutputFileLength = DestinationFile.Length;
DestinationFile.Close();
DestinationFile.Dispose();
// kill the cache and the directory created for it
TrashTempFileStream(cacheFs, tempFile);
return(tempOutputFileLength);
}
public void Encrypt()
{
var ciphertextActual = XSalsa20Poly1305.Encrypt(_plaintext, _key, _nonce);
TestHelpers.AssertEqualBytes(_ciphertext, ciphertextActual);
}
public static void Main()
{
const int n = 10000;
Thread.CurrentThread.CurrentCulture = CultureInfo.InvariantCulture;
Console.WriteLine("Architecture: {0} bit", IntPtr.Size * 8);
Console.WriteLine("CPU-Frequency: {0} MHz", Cpu.CpuFreq);
Cpu.Setup();
Console.WriteLine();
Console.ReadKey();
var m = new byte[100];
var seed = new byte[32];
byte[] privateKey;
byte[] publicKey;
Ed25519.KeyPairFromSeed(out publicKey, out privateKey, seed);
var sig = Ed25519.Sign(m, privateKey);
Ed25519.Sign(m, privateKey);
if (!Ed25519.Verify(sig, m, publicKey))
{
throw new Exception("Bug");
}
if (Ed25519.Verify(sig, m.Concat(new byte[] { 1 }).ToArray(), publicKey))
{
throw new Exception("Bug");
}
Console.BackgroundColor = ConsoleColor.Black;
{
Console.ForegroundColor = ConsoleColor.Yellow;
Console.WriteLine("=== Edwards ===");
Benchmark("KeyGen", () => Ed25519.KeyPairFromSeed(out publicKey, out privateKey, seed), n);
Benchmark("Sign", () => Ed25519.Sign(m, privateKey), n);
Benchmark("Verify", () => Ed25519.Verify(sig, m, publicKey), n);
Benchmark("KeyExchange", () => Ed25519.KeyExchange(publicKey, privateKey), n);
Console.WriteLine();
}
{
Console.ForegroundColor = ConsoleColor.Yellow;
Console.WriteLine("=== Montgomery ===");
Benchmark("KeyGen", () => MontgomeryCurve25519.GetPublicKey(seed), n);
Benchmark("KeyExchange", () => MontgomeryCurve25519.KeyExchange(publicKey, seed), n);
Console.WriteLine();
}
foreach (var size in new[] { 1, 128 * 1024 })
{
Console.ForegroundColor = ConsoleColor.Yellow;
Console.WriteLine("=== Symmetric ({0}) ===", SizeToString(size));
var message = new byte[size];
var ciphertext = new byte[message.Length + 16];
var key = new byte[32];
var nonce = new byte[24];
Benchmark("HSalsa20Core", () => HSalsa20Core(size), n, size);
Benchmark("XSalsa20Poly1305 Encrypt", () => XSalsa20Poly1305.Encrypt(new ArraySegment <byte>(ciphertext), new ArraySegment <byte>(message), new ArraySegment <byte>(key), new ArraySegment <byte>(nonce)), n, size);
Benchmark("SHA512Managed", () => new SHA512Managed().ComputeHash(message), n, size);
Benchmark("SHA512Cng", () => new SHA512Cng().ComputeHash(message), n, size);
Benchmark("SHA512CSP", () => new SHA512CryptoServiceProvider().ComputeHash(message), n, size);
Benchmark("SHA512Chaos", () => Sha512.Hash(message), n, size);
}
}