internal BlowfishCryptography(BlowfishAlgorithm algorithm)
{
_algorithm = algorithm;
_encryptIv = new byte[8] { 0, 0, 0, 0, 0, 0, 0, 0 };
_decryptIv = new byte[8] { 0, 0, 0, 0, 0, 0, 0, 0 };
bf_key_st key = new bf_key_st();
key.P = new UInt32[16 + 2];
key.S = new UInt32[4 * 256];
_key = Marshal.AllocHGlobal(key.P.Length * sizeof(UInt32) + key.S.Length * sizeof(UInt32));
Marshal.StructureToPtr(key, _key, false);
_encryptNum = 0;
_decryptNum = 0;
}
public Blowfish(BlowfishAlgorithm algorithm)
{
_algorithm = algorithm;
_encryptIv = new byte[8] {
0, 0, 0, 0, 0, 0, 0, 0
};
_decryptIv = new byte[8] {
0, 0, 0, 0, 0, 0, 0, 0
};
bf_key_st key = new bf_key_st();
key.P = new UInt32[16 + 2];
key.S = new UInt32[4 * 256];
_key = Marshal.AllocHGlobal(key.P.Length * sizeof(UInt32) + key.S.Length * sizeof(UInt32));
Marshal.StructureToPtr(key, _key, false);
_encryptNum = 0;
_decryptNum = 0;
}
/// <summary>
/// Blowfish is a keyed, symmetric block cipher, designed in 1993 by Bruce Schneier and included in a large
/// number of cipher suites and encryption products. Blowfish provides a good encryption rate in software and no
/// effective cryptanalysis of it has been found to date. However, the Advanced Encryption Standard now receives
/// more attention. Schneier designed Blowfish as a general-purpose algorithm, intended as an alternative to the
/// aging DES and free of the problems and constraints associated with other algorithms. Schneier has stated that,
/// "Blowfish is unpatented, and will remain so in all countries. The algorithm is hereby placed in the public
/// domain, and can be freely used by anyone." The implementation type in use is CFB64.
/// </summary>
public BlowfishCipher()
{
_encryptIv = new byte[8] {
0, 0, 0, 0, 0, 0, 0, 0
};
_decryptIv = new byte[8] {
0, 0, 0, 0, 0, 0, 0, 0
};
bf_key_st key = new bf_key_st();
key.P = new UInt32[16 + 2];
key.S = new UInt32[4 * 256];
_key = Marshal.AllocHGlobal(key.P.Length * sizeof(UInt32) + key.S.Length * sizeof(UInt32));
Marshal.StructureToPtr(key, _key, false);
_encryptNum = 0;
_decryptNum = 0;
KeySchedule(InitialKey);
}