static byte[] Func1(byte[] s)
{
byte[] quotedS = Escape(s).ToArray();
byte[] concatenated = Utility.Concat(
Encoding.ASCII.GetBytes(PREFIX_STRING),
quotedS,
Encoding.ASCII.GetBytes(SUFFIX_STRING));
byte[] padded = Challenge9.Pkcs7(concatenated, 16);
return(Utility.Encrypt(padded, _keyBytes, _iv, CipherMode.CBC));
}
private static void Func1(out byte[] cipherText, out byte[] iv)
{
string[] textArray = Utility.GetResource("17.txt")
.Split('\r', '\n')
.Where(x => !string.IsNullOrWhiteSpace(x))
.ToArray();
string s = textArray[Utility.Random() % textArray.Length];
byte[] plainText = Encoding.ASCII.GetBytes(s);
byte[] paddedPlainText = Challenge9.Pkcs7(plainText, BLOCK_SIZE);
iv = Utility.CreateRandomKey();
cipherText = Utility.Encrypt(paddedPlainText, _keyBytes, iv, CipherMode.CBC);
}
