public static void RC5_32_ecb_encrypt(byte[] inBytes, byte[] outBytes,
RC5_32_KEY ks, int encrypt, CryptContext cryptContext)
{
ulong l = 0;
ulong[] d = new ulong[2];
int c2l_inBytes_startIdx = 0;
int l2c_outBytes_startIdx = 0;
CryptUtil.c2l(inBytes, ref l, ref c2l_inBytes_startIdx);
d[0] = l;
CryptUtil.c2l(inBytes, ref l, ref c2l_inBytes_startIdx);
d[1] = l;
if (encrypt > 0)
{
RC5_32_encrypt(ref d, ks);
}
else
{
RC5_32_decrypt(ref d, ks);
}
l = d[0];
CryptUtil.l2c(l, outBytes, ref l2c_outBytes_startIdx);
l = d[1];
CryptUtil.l2c(l, outBytes, ref l2c_outBytes_startIdx);
l = d[0] = d[1] = 0;
}
public static void DES_ecb_encrypt(byte[] input, byte[] output,
DES_key_schedule ks, int enc)
{
ulong l = 0;
ulong[] ll = new ulong[2];
byte[] in_input = input;
byte[] out_output = output;
int c2l_in_input_startIdx = 0;
int l2c_out_output_startIdx = 0;
CryptUtil.c2l(in_input, ref l, ref c2l_in_input_startIdx);
ll[0] = l;
CryptUtil.c2l(in_input, ref l, ref c2l_in_input_startIdx);
ll[1] = l;
DES_encrypt1(ll, ks, enc);
l = ll[0];
CryptUtil.l2c(l, out_output, ref l2c_out_output_startIdx);
l = ll[1];
CryptUtil.l2c(l, out_output, ref l2c_out_output_startIdx);
l = ll[0] = ll[1] = 0;
}
public static void RC5_32_cbc_encrypt(byte[] inBytes, byte[] outBytes,
long length, RC5_32_KEY ks, byte[] iv,
int encrypt)
{
ulong tin0 = 0, tin1 = 0;
ulong tout0 = 0, tout1 = 0, xor0 = 0, xor1 = 0;
long l = length;
ulong[] tin = new ulong[2];
int c2l_iv_startIdx = 0;
int c2l_inBytes_startIdx = 0;
int l2c_outBytes_startIdx = 0;
int l2c_iv_startIdx = 0;
if (encrypt > 0)
{
CryptUtil.c2l(iv, ref tout0, ref c2l_iv_startIdx);
CryptUtil.c2l(iv, ref tout1, ref c2l_iv_startIdx);
c2l_iv_startIdx -= 8;
for (l -= 8; l >= 0; l -= 8)
{
CryptUtil.c2l(inBytes, ref tin0, ref c2l_inBytes_startIdx);
CryptUtil.c2l(inBytes, ref tin1, ref c2l_inBytes_startIdx);
tin0 ^= tout0;
tin1 ^= tout1;
tin[0] = tin0;
tin[1] = tin1;
RC5_32_encrypt(ref tin, ks);
tout0 = tin[0];
CryptUtil.l2c(tout0, outBytes, ref l2c_outBytes_startIdx);
tout1 = tin[1];
CryptUtil.l2c(tout1, outBytes, ref l2c_outBytes_startIdx);
}
if (l != -8)
{
CryptUtil.c2ln(inBytes, ref tin0, ref tin1, l + 8, ref c2l_inBytes_startIdx);
tin0 ^= tout0;
tin1 ^= tout1;
tin[0] = tin0;
tin[1] = tin1;
RC5_32_encrypt(ref tin, ks);
tout0 = tin[0];
CryptUtil.l2c(tout0, outBytes, ref l2c_outBytes_startIdx);
tout1 = tin[1];
CryptUtil.l2c(tout1, outBytes, ref l2c_outBytes_startIdx);
}
CryptUtil.l2c(tout0, iv, ref l2c_iv_startIdx);
CryptUtil.l2c(tout1, iv, ref l2c_iv_startIdx);
}
else
{
CryptUtil.c2l(iv, ref xor0, ref c2l_iv_startIdx);
CryptUtil.c2l(iv, ref xor1, ref c2l_iv_startIdx);
c2l_iv_startIdx -= 8;
for (l -= 8; l >= 0; l -= 8)
{
CryptUtil.c2l(inBytes, ref tin0, ref c2l_inBytes_startIdx);
tin[0] = tin0;
CryptUtil.c2l(inBytes, ref tin1, ref c2l_inBytes_startIdx);
tin[1] = tin1;
RC5_32_decrypt(ref tin, ks);
tout0 = tin[0] ^ xor0;
tout1 = tin[1] ^ xor1;
CryptUtil.l2c(tout0, outBytes, ref l2c_outBytes_startIdx);
CryptUtil.l2c(tout1, outBytes, ref l2c_outBytes_startIdx);
xor0 = tin0;
xor1 = tin1;
}
if (l != -8)
{
CryptUtil.c2l(inBytes, ref tin0, ref c2l_inBytes_startIdx);
tin[0] = tin0;
CryptUtil.c2l(inBytes, ref tin1, ref c2l_inBytes_startIdx);
tin[1] = tin1;
RC5_32_decrypt(ref tin, ks);
tout0 = tin[0] ^ xor0;
tout1 = tin[1] ^ xor1;
CryptUtil.l2cn(tout0, tout1, outBytes, l + 8, ref l2c_outBytes_startIdx);
xor0 = tin0;
xor1 = tin1;
}
CryptUtil.l2c(xor0, iv, ref l2c_iv_startIdx);
CryptUtil.l2c(xor1, iv, ref l2c_iv_startIdx);
}
tin0 = tin1 = tout0 = tout1 = xor0 = xor1 = 0;
tin[0] = tin[1] = 0;
}
