/// <summary>
/// function compares two files to check whether they are the same
/// <para>Returns true if the files are the same</para>
/// </summary>
/// <param name="fileOne">First file to check</param>
/// <param name="compareFile">File to compare with</param>
/// <returns>returns true if the </returns>
static public bool CompareFile(string fileOne, string compareFile)
{
bool areEqual = false;
if (CheckFile.checkExtention(fileOne, compareFile))
{
var fileOneBytes = readFile(fileOne);
var fileTwoBytes = readFile(compareFile);
if (fileOneBytes.Length == fileTwoBytes.Length)
{
int pos = 0;
if (fileOneBytes.Length == fileTwoBytes.Length)
{
bool equal = true;
while (pos < fileOneBytes.Length && fileTwoBytes[pos] == fileTwoBytes[pos] && equal == true)
{
equal = checkBits(fileOneBytes[pos], fileTwoBytes[pos]);
pos++;
}
if (pos == fileOneBytes.Length && pos == fileTwoBytes.Length)
{
areEqual = true;
}
}
}
}
return(areEqual);
}
/// <summary>
/// Function decrypts the given string
/// <para> Returns a decrypted string</para>
/// </summary>
/// <param name="encryptedString"> the obj to decrypt</param>
/// <param name="keys"> Obj to store key and seed</param>
/// <returns>returns a decrypted string or the name of the decrypted file name</returns>
public string Decrypt(string encryptedString, KeyHolder keys)
{
string decryptedObj = "";
if (!CheckFile.checkHasExtention(encryptedString))
{
AesEncryption aes = new AesEncryption();
aes.Key = keys.Key;
aes.Seed = keys.Seed;
decryptedObj = aes.Decrypt(encryptedString);
}
else
{
Decrypt(encryptedString, encryptedString, keys);
}
return(decryptedObj);
}
/// <summary>
/// function encrypts the given str
/// <para/> function returns an encrypted string
/// </summary>
/// <param name="str"> str to encrypt</param>
/// <param name="keys">place to store encryption keys and Seed</param>
/// <param name="seed">user defined seed to run encryption on</param>
/// <returns>returns an encrypted string ro the name of the file where the file was encrypted</returns>
public string EncryptStr(string str, ref KeyHolder keys, string seed = null, string key = null)
{
if (!CheckFile.checkHasExtention(str))
{
int len = str.Length;
AesEncryption Aes = new AesEncryption();
if (seed == null && key == null)
{
str = Aes.Encrypt(str);
}
else
{
if (seed != null && key == null)
{
keys = SetSeed(seed, ref Aes);
Aes.Seed = keys.Seed;
str = Aes.Encrypt(str);
}
else if (seed == null && key != null)
{
keys = SetKey(key, ref Aes);
Aes.Key = keys.Key;
str = Aes.Encrypt(str);
}
else
{
keys = SetKey(key, ref Aes);
Aes.Key = keys.Key;
keys = SetSeed(seed, ref Aes);
Aes.Seed = keys.Seed;
str = Aes.Encrypt(str);
}
}
keys = new KeyHolder(Aes.Key, Aes.Seed);
Aes.FlushKeys();
}
return(str);
}
