public static void DecryptData(string fileName, RSAKey key)
{
string[] temp = fileName.Split('.');
string saveFileName = temp[0] + "_decryptedECB";
if (temp.Length == 2)
{
saveFileName = temp[0] + "_decryptedECB." + temp[1];
}
FileStream readStream = new FileStream(fileName, FileMode.Open, FileAccess.Read);
FileStream writeStream = new FileStream(saveFileName, FileMode.Create, FileAccess.Write);
using (StreamWriter writer = new StreamWriter(writeStream))
{
using (StreamReader sr = new StreamReader(readStream))
{
string line;
while ((line = sr.ReadLine()) != null)
{
byte[] bytes = Encoding.UTF8.GetBytes(line);
string testowy = Encoding.UTF8.GetString(bytes);
BigInteger decryptedFormString = new BigInteger(Convert.FromBase64String(testowy));
BigInteger modPowValue = BigInteger.ModPow(decryptedFormString, key.d, key.n);
byte[] decryptedData = modPowValue.ToByteArray();
writer.Write(Encoding.UTF8.GetString(decryptedData));
}
}
}
readStream.Close();
writeStream.Close();
}
public static void DecryptData(string fileName, RSAKey key)
{
string[] temp = fileName.Split('.');
string saveFileName = temp[0] + "_decryptedCBC";
if (temp.Length == 2)
{
saveFileName = temp[0] + "_decryptedCBC." + temp[1];
}
FileStream readStream = new FileStream(fileName, FileMode.Open, FileAccess.Read);
FileStream writeStream = new FileStream(saveFileName, FileMode.Create, FileAccess.Write);
int fileBytesToRead = (int)readStream.Length;
BitArray CBC_seed = m_initializationVector;
using (StreamWriter writer = new StreamWriter(writeStream))
{
using (StreamReader sr = new StreamReader(readStream))
{
string line;
while ((line = sr.ReadLine()) != null)
{
byte[] bytes;
int readCount = line.Length;
fileBytesToRead -= readCount;
bytes = Encoding.UTF8.GetBytes(line);
string testowy = Encoding.UTF8.GetString(bytes);
BigInteger decryptedFormString = new BigInteger(Convert.FromBase64String(testowy));
BigInteger modPowValue = BigInteger.ModPow(decryptedFormString, key.d, key.n);
BitArray decryptedData = new BitArray(modPowValue.ToByteArray());
if (decryptedData.Length != CBC_seed.Length)
{
BitArray seedCopy = new BitArray(CBC_seed);
CBC_seed = new BitArray(decryptedData.Length);
for (int i = 0; i < decryptedData.Length; i++)
{
CBC_seed.Set(i, seedCopy.Get(i));
}
}
decryptedData.Xor(CBC_seed);
bytes = new byte[decryptedData.Length / 8];
decryptedData.CopyTo(bytes, 0);
CBC_seed = new BitArray(Convert.FromBase64String(testowy));
if (bytes[bytes.Length - 1] == 0)
{
int lastNonZeroIndex = Array.FindLastIndex(bytes, x => x != 0);
Array.Resize(ref bytes, lastNonZeroIndex + 1);
}
writer.Write(Encoding.UTF8.GetString(bytes));
}
}
}
readStream.Close();
writeStream.Close();
}
public static void EncryptData(string fileName, RSAKey key)
{
string[] temp = fileName.Split('.');
string saveFileName = temp[0] + "_encryptedECB";
if (temp.Length == 2)
{
saveFileName = temp[0] + "_encryptedECB." + temp[1];
}
SetByteCount(key);
FileStream readStream = new FileStream(fileName, FileMode.Open, FileAccess.Read);
FileStream writeStream = new FileStream(saveFileName, FileMode.Create, FileAccess.Write);
FileStream writeStream2 = new FileStream(saveFileName + "microsoft", FileMode.Create, FileAccess.Write);
int fileBytesToRead = (int)readStream.Length;
using (StreamWriter writer = new StreamWriter(writeStream))
{
using (StreamWriter writer2 = new StreamWriter(writeStream2))
{
using (RSACryptoServiceProvider crypto = new RSACryptoServiceProvider())
{
RSAParameters rsaKey = new RSAParameters();
rsaKey.Modulus = key.n.ToByteArray();
rsaKey.Exponent = key.e.ToByteArray();
crypto.ImportParameters(rsaKey);
while (fileBytesToRead > 0)
{
byte[] bytes = new byte[byteCount];
int readCount = readStream.Read(bytes, 0, byteCount); //przeczytaj n-bytów
fileBytesToRead -= readCount; //pomiejsz liczbę do przeczytania
BigInteger numberFromBytes = new BigInteger(bytes);
BigInteger encryptedData = BigInteger.ModPow(numberFromBytes, key.e, key.n);
byte[] bytesToSave = encryptedData.ToByteArray();
//if (bytesToSave.Length != key.n.ToByteArray().Length)
//bytesToSave = new byte[key.n.ToByteArray().Length - bytesToSave.Length].Concat(bytesToSave).ToArray();
string base64 = Convert.ToBase64String(bytesToSave);
writer.Write(base64 + "\n");
bytesToSave = crypto.Encrypt(bytes, RSAEncryptionPadding.Pkcs1);
base64 = Convert.ToBase64String(bytesToSave);
writer2.Write(base64 + "\n");
}
}
}
}
readStream.Close();
writeStream.Close();
writeStream2.Close();
}
public static void EncryptData(string fileName, RSAKey key)
{
string[] temp = fileName.Split('.');
string saveFileName = temp[0] + "_encryptedCBC";
if (temp.Length == 2)
{
saveFileName = temp[0] + "_encryptedCBC." + temp[1];
}
SetByteCount(key);
FileStream readStream = new FileStream(fileName, FileMode.Open, FileAccess.Read);
FileStream writeStream = new FileStream(saveFileName, FileMode.Create, FileAccess.Write);
int fileBytesToRead = (int)readStream.Length;
m_initializationVector = GenerateInitializationVector((uint)byteCount);
BitArray CBC_seed = m_initializationVector;
using (StreamWriter writer = new StreamWriter(writeStream))
{
while (fileBytesToRead > 0)
{
byte[] bytes = new byte[byteCount];
int readCount = readStream.Read(bytes, 0, byteCount); //przeczytaj n-bytów
fileBytesToRead -= readCount; //pomiejsz liczbę do przeczytania
BitArray array = new BitArray(bytes);
if (CBC_seed.Length != array.Length)
{
BitArray seedCopy = new BitArray(CBC_seed);
CBC_seed = new BitArray(array.Length);
for (int i = 0; i < array.Length; i++)
{
CBC_seed.Set(i, seedCopy.Get(i));
}
}
array.Xor(CBC_seed);
array.CopyTo(bytes, 0);
BigInteger numberFromBytes = new BigInteger(bytes);
BigInteger encryptedData = BigInteger.ModPow(numberFromBytes, key.e, key.n);
byte[] bytesToSave = encryptedData.ToByteArray();
CBC_seed = new BitArray(bytesToSave);
string base64 = Convert.ToBase64String(bytesToSave);
writer.Write(base64 + "\n");
}
writer.Close();
}
readStream.Close();
writeStream.Close();
}
public static void DecryptDataWithMicrosoft(string fileName, RSAKey key)
{
string[] temp = fileName.Split('.');
string saveFileName = temp[0] + "_decryptedECB";
if (temp.Length == 2)
{
saveFileName = temp[0] + "_decryptedECB." + temp[1];
}
FileStream readStream = new FileStream(fileName, FileMode.Open, FileAccess.Read);
FileStream writeStream = new FileStream(saveFileName + "microsoft", FileMode.Create, FileAccess.Write);
using (StreamWriter writer = new StreamWriter(writeStream))
{
using (StreamReader sr = new StreamReader(readStream))
{
using (RSACryptoServiceProvider crypto = new RSACryptoServiceProvider())
{
RSAParameters rsaKey = new RSAParameters();
rsaKey.Modulus = key.n.ToByteArray();
rsaKey.Exponent = key.e.ToByteArray();
rsaKey.D = key.d.ToByteArray();
rsaKey.P = key.p.ToByteArray();
rsaKey.Q = key.q.ToByteArray();
rsaKey.DQ = (key.d % (key.q - 1)).ToByteArray();
rsaKey.DP = (key.d % (key.p - 1)).ToByteArray();
rsaKey.InverseQ = RSAKeyGenerator.ModularInverse(key.q, key.p).ToByteArray();
crypto.ImportParameters(rsaKey);
string line;
while ((line = sr.ReadLine()) != null)
{
byte[] bytes = Encoding.UTF8.GetBytes(line);
string testowy = Encoding.UTF8.GetString(bytes);
byte[] decryptedData = crypto.Decrypt(Convert.FromBase64String(testowy), RSAEncryptionPadding.Pkcs1);
writer.Write(Encoding.UTF8.GetString(decryptedData));
}
}
}
}
readStream.Close();
writeStream.Close();
}
private static void SetByteCount(RSAKey key)
{
var rand = new Random();
byteCount = rand.Next(25, key.n.GetByteCount() - 1);
}
