/// <summary>
/// Used to decrypt something encrypted in AES
/// </summary>
/// <param name="key">AES Key received from the server</param>
/// <param name="result">Encrypted byte array you want to decrypt</param>
/// <returns>Decrypted version of "result"</returns>
public static byte[] DecryptAES(byte[] key, byte[] result)
{
OpenSSL.Crypto.CipherContext d_ctx = new OpenSSL.Crypto.CipherContext(OpenSSL.Crypto.Cipher.AES_128_CBC);
byte[] var = new byte[16];
for (int i = 0; i < 16; i++)
{
var[i] = key[i + 16];
}
return(d_ctx.Decrypt(result, key, var));
}
/// <summary>
/// EncryptAES is being used for encrypting the password sent to the authentication server
/// </summary>
/// <param name="key">AES Key received from the server</param>
/// <param name="hash">Actually the string you want to encrypt</param>
/// <returns>Encrypted byte[] of hash</returns>
public static byte[] EncryptAES(byte[] key, string hash)
{
OpenSSL.Crypto.CipherContext d_ctx = new OpenSSL.Crypto.CipherContext(OpenSSL.Crypto.Cipher.AES_128_CBC);
byte[] var = new byte[16];
for (int i = 0; i < 16; i++)
{
var[i] = key[i + 16];
}
return(d_ctx.Encrypt(Encoding.Default.GetBytes(hash), key, var));
}
static void Main(string[] args)
{
if (args.Length == 0)
{
System.Console.WriteLine("Please enter a numeric argument.");
Environment.Exit(0);
}
Console.WriteLine("Encrypt = 0 | Decrypt = 1: ");
int mode = int.Parse(Console.ReadLine());
Console.WriteLine("key: " + args[0]);
string s = args[0];
if (s.Length > 16 || s.Length == 0)
{
Console.WriteLine("Too looooooooooooong! (or short)");
Environment.Exit(0);
}
byte[] key = System.Text.Encoding.ASCII.GetBytes(s);
Console.WriteLine("vector: " + args[1]);
s = args[1];
if (s.Length > 16 || s.Length == 0)
{
Console.WriteLine("Too looooooooooooong! (or short)");
Environment.Exit(0);
}
byte[] vec = System.Text.Encoding.ASCII.GetBytes(s);
Console.Write("path: ");
s = @Console.ReadLine();
OpenSSL.Crypto.CipherContext ctx = new OpenSSL.Crypto.CipherContext(OpenSSL.Crypto.Cipher.AES_128_CTR);
String line;
using (StreamReader sr = new StreamReader(s))
{
line = sr.ReadToEnd();
//Console.WriteLine(line);
}
string answer = "mode error";
if (mode == 1)
{
byte[] msg = Convert.FromBase64String(line);
byte[] dec = ctx.Decrypt(msg, key, vec);
answer = new string(System.Text.Encoding.ASCII.GetChars(dec));
//Console.WriteLine(kak);
}
else if (mode == 0)
{
byte[] msg = System.Text.Encoding.ASCII.GetBytes(line);
byte[] enc = ctx.Encrypt(msg, key, vec);
answer = Convert.ToBase64String(enc);
}
Console.WriteLine(answer);
Console.ReadKey();
}
static void Main(string[] args)
{
int mode = (args[0] == "e" ? 0 : 1);
string key_string = args[1];
if (key_string.Length > 16 || key_string.Length == 0)
{
Console.WriteLine("Key length must be in range [1, 16], not " + args[1].Length);
Environment.Exit(0);
}
byte[] key = Encoding.ASCII.GetBytes(key_string);
key_string = args[2];
if (key_string.Length > 16 || key_string.Length == 0)
{
Console.WriteLine("Vector length must be in range [1, 16]" + args[2].Length);
Environment.Exit(0);
}
byte[] vector = Encoding.ASCII.GetBytes(key_string);
string path = @"D:\Универ\Захист\Lab_5\Lab_5\Text\1.txt";
OpenSSL.Crypto.CipherContext ctx = new OpenSSL.Crypto.CipherContext(OpenSSL.Crypto.Cipher.AES_128_CTR);
string line;
using (StreamReader sr = new StreamReader(path))
{
line = sr.ReadToEnd();
}
string answer = "";
if (mode == 1) // decryption
{
byte[] msg = Convert.FromBase64String(line);
byte[] decrypted = ctx.Decrypt(msg, key, vector);
answer = new string(System.Text.Encoding.ASCII.GetChars(decrypted));
}
else if (mode == 0) // encryption
{
byte[] msg = Encoding.ASCII.GetBytes(line);
byte[] enc = ctx.Encrypt(msg, key, vector);
answer = Convert.ToBase64String(enc);
}
Console.WriteLine(answer);
Console.ReadKey();
}
/// <summary>
/// EncryptAES is being used for encrypting the password sent to the authentication server
/// </summary>
/// <param name="key">AES Key received from the server</param>
/// <param name="hash">Actually the string you want to encrypt</param>
/// <returns>Encrypted byte[] of hash</returns>
public static byte[] EncryptAES(byte[] key, string hash)
{
OpenSSL.Crypto.CipherContext d_ctx = new OpenSSL.Crypto.CipherContext( OpenSSL.Crypto.Cipher.AES_128_CBC );
byte[] var = new byte[16];
for ( int i = 0; i < 16; i++ ) {
var[i] = key[i + 16];
}
return d_ctx.Encrypt( Encoding.Default.GetBytes( hash ), key, var );
}
/// <summary>
/// Used to decrypt something encrypted in AES
/// </summary>
/// <param name="key">AES Key received from the server</param>
/// <param name="result">Encrypted byte array you want to decrypt</param>
/// <returns>Decrypted version of "result"</returns>
public static byte[] DecryptAES(byte[] key, byte[] result)
{
OpenSSL.Crypto.CipherContext d_ctx = new OpenSSL.Crypto.CipherContext( OpenSSL.Crypto.Cipher.AES_128_CBC );
byte[] var = new byte[16];
for ( int i = 0; i < 16; i++ ) {
var[i] = key[i + 16];
}
return d_ctx.Decrypt( result, key, var );
}
