public EncryptingResultModel Encrypt(byte[] input, byte[] keyInput, int w, int r, int b)
{
var key = GetKey(keyInput, b);
for (int i = 0; i < keyInput.Length; i++)
{
keyInput[i] = 0;
}
var helper = new RC5Helper(w, r, key);
input = GetFullInput(input, helper.BlockSize);
var IV = GetInitializeVector(helper.BlockSize);
var resultData = new byte[input.Length];
var result = new EncryptingResultModel {
IV = EncryptInitializeVector(IV, key, w, r)
};
for (int i = 0; i < input.Length; i += helper.BlockSize)
{
var currentBlock = new byte[helper.BlockSize];
Array.Copy(input, i, currentBlock, 0, helper.BlockSize);
currentBlock = XOR(IV, currentBlock, helper.W);
IV = EncryptBlock(currentBlock, helper);
Array.Copy(IV, 0, resultData, i, helper.BlockSize);
}
result.EncryptedData = resultData;
return(result);
}
private EncryptingResultModel GetEncryptingResultModel(byte[] input, int blockSize)
{
var result = new EncryptingResultModel();
result.IV = new byte[blockSize];
result.EncryptedData = new byte[input.Length - blockSize];
Array.Copy(input, 0, result.IV, 0, blockSize);
Array.Copy(input, blockSize, result.EncryptedData, 0, result.EncryptedData.Length);
return(result);
}
public void SaveEncriptingResut(EncryptingResultModel encryptingResult, FileInfo file)
{
var fileData = new byte[encryptingResult.IV.Length + encryptingResult.EncryptedData.Length];
Array.Copy(encryptingResult.IV, 0, fileData, 0, encryptingResult.IV.Length);
Array.Copy(encryptingResult.EncryptedData, 0, fileData, encryptingResult.IV.Length, encryptingResult.EncryptedData.Length);
var encodedFilePath = file.FullName.Insert(file.FullName.Length - file.Extension.Length, "_encrypted");
File.WriteAllBytes(encodedFilePath, fileData);
}