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 DES_set_key_unchecked(byte[] key, DES_key_schedule schedule)
{
ulong c = 0, d = 0, t = 0, s = 0, t2 = 0;
byte[] in_Key;
ulong[] k;
int i;
in_Key = key;
int c2l_in_Key_startIdx = 0;
CryptUtil.c2l(in_Key, ref c, ref c2l_in_Key_startIdx);
CryptUtil.c2l(in_Key, ref d, ref c2l_in_Key_startIdx);
/*
* do PC1 in 47 simple operations :-) Thanks to John Fletcher
* ([email protected]) for the inspiration. :-)
*/
CryptUtil.PERM_OP(ref d, ref c, ref t, 4, 0x0f0f0f0fL);
CryptUtil.HPERM_OP(ref c, t, -2, 0xcccc0000L);
CryptUtil.HPERM_OP(ref d, t, -2, 0xcccc0000L);
CryptUtil.PERM_OP(ref d, ref c, ref t, 1, 0x55555555L);
CryptUtil.PERM_OP(ref c, ref d, ref t, 8, 0x00ff00ffL);
CryptUtil.PERM_OP(ref d, ref c, ref t, 1, 0x55555555L);
d = (((d & 0x000000ffL) << (int)16L) | (d & 0x0000ff00L) |
((d & 0x00ff0000L) >> (int)16L) | ((c & 0xf0000000L) >> (int)4L));
c &= 0x0fffffffL;
for (i = 0; i < ITERATIONS; i++)
{
k = schedule.ks[i].deslong;
if (shifts2[i] != 0)
{
c = ((c >> (int)2L) | (c << (int)26L));
d = ((d >> (int)2L) | (d << (int)26L));
}
else
{
c = ((c >> (int)1L) | (c << (int)27L));
d = ((d >> (int)1L) | (d << (int)27L));
}
c &= 0x0fffffffL;
d &= 0x0fffffffL;
/*
* could be a few less shifts but I am to lazy at this point in time
* to investigate
*/
s = des_skb[0, (c) & 0x3f] |
des_skb[1, ((c >> (int)6L) & 0x03) | ((c >> (int)7L) & 0x3c)] |
des_skb[2, ((c >> (int)13L) & 0x0f) | ((c >> (int)14L) & 0x30)] |
des_skb[3, ((c >> (int)20L) & 0x01) | ((c >> (int)21L) & 0x06) |
((c >> (int)22L) & 0x38)];
t = des_skb[4, (d) & 0x3f] |
des_skb[5, ((d >> (int)7L) & 0x03) | ((d >> (int)8L) & 0x3c)] |
des_skb[6, (d >> (int)15L) & 0x3f] |
des_skb[7, ((d >> (int)21L) & 0x0f) | ((d >> (int)22L) & 0x30)];
/* table contained 0213 4657 */
t2 = ((t << (int)16L) | (s & 0x0000ffffL)) & 0xffffffffL;
k[0] = CryptUtil.ROTATE(t2, 30) & 0xffffffffL;
t2 = ((s >> (int)16L) | (t & 0xffff0000L));
k[1] = CryptUtil.ROTATE(t2, 26) & 0xffffffffL;
}
}
public static void RC5_32_set_key(RC5_32_KEY key, int len, byte[] data,
int rounds)
{
int c2l_data_startIdx = 0;
ulong[] L = new ulong[64];
ulong l = 0, ll = 0, A = 0, B = 0, k = 0;
ulong[] S = null;
int i = 0, j = 0, m = 0, c = 0, t = 0, ii = 0, jj = 0;
if ((rounds != RC5_16_ROUNDS) &&
(rounds != RC5_12_ROUNDS) && (rounds != RC5_8_ROUNDS))
{
rounds = RC5_16_ROUNDS;
}
key.rounds = rounds;
S = key.data;
j = 0;
for (i = 0; i <= (len - 8); i += 8)
{
CryptUtil.c2l(data, ref l, ref c2l_data_startIdx);
L[j++] = l;
CryptUtil.c2l(data, ref l, ref c2l_data_startIdx);
L[j++] = l;
}
ii = len - i;
if (ii != 0)
{
k = (ulong)(len & 0x07);
CryptUtil.c2ln(data, ref l, ref ll, (long)k, ref c2l_data_startIdx);
L[j + 0] = l;
L[j + 1] = ll;
}
c = (len + 3) / 4;
t = (rounds + 1) * 2;
S[0] = RC5_32_P;
for (i = 1; i < t; i++)
{
S[i] = (S[i - 1] + RC5_32_Q) & RC5_32_MASK;
}
j = (t > c) ? t : c;
j *= 3;
ii = jj = 0;
A = B = 0;
for (i = 0; i < j; i++)
{
k = (S[ii] + A + B) & RC5_32_MASK;
A = S[ii] = ROTATE_l32(k, 3);
m = (int)(A + B);
k = (L[jj] + A + B) & RC5_32_MASK;
B = L[jj] = ROTATE_l32(k, (ulong)m);
if (++ii >= t)
{
ii = 0;
}
if (++jj >= c)
{
jj = 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;
}