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Updated old RC4 code in Kerberos 5, increased performance

Browse Source
pull/36/head
jsteube 9 years ago
parent a849313093
commit 87095191d7
3 changed files with 225 additions and 243 deletions
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156
OpenCL/m07500_a0.cl
Unescape View File

@ -23,8 +23,7 @@ typedef struct
{
u8 S[256];
u8 i;
u8 j;
u32 wtf_its_faster;
} RC4_KEY;
@ -39,137 +38,132 @@ static void swap (__local RC4_KEY *rc4_key, const u8 i, const u8 j)
static void rc4_init_16 (__local RC4_KEY *rc4_key, const u32 data[4])
{
u32 i;
u32 v = 0x03020100;
u32 a = 0x04040404;
#pragma unroll 256
for (i = 0; i < 256; i += 1) rc4_key->S[i] = i;
__local u32 *ptr = (__local u32 *) rc4_key->S;
u8 j = 0;
#pragma unroll
for (u32 i = 0; i < 64; i++)
{
*ptr++ = v; v += a;
}
#pragma unroll 16
for (i = 0; i < 256; i += 16)
u32 j = 0;
for (u32 i = 0; i < 16; i++)
{
u32 idx = i;
u32 idx = i * 16;
u32 v;
v = data[0];
j += rc4_key->S[idx] + (v >> 0); swap (rc4_key, idx, j); idx++;
j += rc4_key->S[idx] + (v >> 8); swap (rc4_key, idx, j); idx++;
j += rc4_key->S[idx] + (v >> 16); swap (rc4_key, idx, j); idx++;
j += rc4_key->S[idx] + (v >> 24); swap (rc4_key, idx, j); idx++;
j += rc4_key->S[idx] + (v >> 0); swap (rc4_key, idx, j); idx++;
j += rc4_key->S[idx] + (v >> 8); swap (rc4_key, idx, j); idx++;
j += rc4_key->S[idx] + (v >> 16); swap (rc4_key, idx, j); idx++;
j += rc4_key->S[idx] + (v >> 24); swap (rc4_key, idx, j); idx++;
v = data[1];
j += rc4_key->S[idx] + (v >> 0); swap (rc4_key, idx, j); idx++;
j += rc4_key->S[idx] + (v >> 8); swap (rc4_key, idx, j); idx++;
j += rc4_key->S[idx] + (v >> 16); swap (rc4_key, idx, j); idx++;
j += rc4_key->S[idx] + (v >> 24); swap (rc4_key, idx, j); idx++;
j += rc4_key->S[idx] + (v >> 0); swap (rc4_key, idx, j); idx++;
j += rc4_key->S[idx] + (v >> 8); swap (rc4_key, idx, j); idx++;
j += rc4_key->S[idx] + (v >> 16); swap (rc4_key, idx, j); idx++;
j += rc4_key->S[idx] + (v >> 24); swap (rc4_key, idx, j); idx++;
v = data[2];
j += rc4_key->S[idx] + (v >> 0); swap (rc4_key, idx, j); idx++;
j += rc4_key->S[idx] + (v >> 8); swap (rc4_key, idx, j); idx++;
j += rc4_key->S[idx] + (v >> 16); swap (rc4_key, idx, j); idx++;
j += rc4_key->S[idx] + (v >> 24); swap (rc4_key, idx, j); idx++;
j += rc4_key->S[idx] + (v >> 0); swap (rc4_key, idx, j); idx++;
j += rc4_key->S[idx] + (v >> 8); swap (rc4_key, idx, j); idx++;
j += rc4_key->S[idx] + (v >> 16); swap (rc4_key, idx, j); idx++;
j += rc4_key->S[idx] + (v >> 24); swap (rc4_key, idx, j); idx++;
v = data[3];
j += rc4_key->S[idx] + (v >> 0); swap (rc4_key, idx, j); idx++;
j += rc4_key->S[idx] + (v >> 8); swap (rc4_key, idx, j); idx++;
j += rc4_key->S[idx] + (v >> 16); swap (rc4_key, idx, j); idx++;
j += rc4_key->S[idx] + (v >> 24); swap (rc4_key, idx, j); idx++;
j += rc4_key->S[idx] + (v >> 0); swap (rc4_key, idx, j); idx++;
j += rc4_key->S[idx] + (v >> 8); swap (rc4_key, idx, j); idx++;
j += rc4_key->S[idx] + (v >> 16); swap (rc4_key, idx, j); idx++;
j += rc4_key->S[idx] + (v >> 24); swap (rc4_key, idx, j); idx++;
}
rc4_key->i = 0;
rc4_key->j = 0;
}
static u32 rc4_next_4 (__local RC4_KEY *rc4_key, const u32 ct)
static u8 rc4_next_16 (__local RC4_KEY *rc4_key, u8 i, u8 j, const u32 in[4], u32 out[4])
{
u8 idx;
u32 xor4 = 0;
#pragma unroll
for (u32 k = 0; k < 4; k++)
{
u32 xor4 = 0;
u8 i = rc4_key->i;
u8 j = rc4_key->j;
u8 idx;
i += 1;
j += rc4_key->S[i];
i += 1;
j += rc4_key->S[i];
swap (rc4_key, i, j);
swap (rc4_key, i, j);
idx = rc4_key->S[i] + rc4_key->S[j];
idx = rc4_key->S[i] + rc4_key->S[j];
xor4 |= rc4_key->S[idx] << 0;
xor4 |= rc4_key->S[idx] << 0;
i += 1;
j += rc4_key->S[i];
i += 1;
j += rc4_key->S[i];
swap (rc4_key, i, j);
swap (rc4_key, i, j);
idx = rc4_key->S[i] + rc4_key->S[j];
idx = rc4_key->S[i] + rc4_key->S[j];
xor4 |= rc4_key->S[idx] << 8;
xor4 |= rc4_key->S[idx] << 8;
i += 1;
j += rc4_key->S[i];
i += 1;
j += rc4_key->S[i];
swap (rc4_key, i, j);
swap (rc4_key, i, j);
idx = rc4_key->S[i] + rc4_key->S[j];
idx = rc4_key->S[i] + rc4_key->S[j];
xor4 |= rc4_key->S[idx] << 16;
xor4 |= rc4_key->S[idx] << 16;
i += 1;
j += rc4_key->S[i];
i += 1;
j += rc4_key->S[i];
swap (rc4_key, i, j);
swap (rc4_key, i, j);
idx = rc4_key->S[i] + rc4_key->S[j];
idx = rc4_key->S[i] + rc4_key->S[j];
xor4 |= rc4_key->S[idx] << 24;
xor4 |= rc4_key->S[idx] << 24;
rc4_key->i = i;
rc4_key->j = j;
out[k] = in[k] ^ xor4;
}
return ct ^ xor4;
return j;
}
static int decrypt_and_check (__local RC4_KEY *rc4_key, u32 data[4], u32 timestamp_ct[8])
{
u32 pt;
rc4_init_16 (rc4_key, data);
pt = rc4_next_4 (rc4_key, timestamp_ct[0]);
pt = rc4_next_4 (rc4_key, timestamp_ct[1]);
pt = rc4_next_4 (rc4_key, timestamp_ct[2]);
pt = rc4_next_4 (rc4_key, timestamp_ct[3]);
u32 out[4];
if ((pt & 0xffff0000) != 0x30320000) return 0;
pt = rc4_next_4 (rc4_key, timestamp_ct[4]);
if (((pt & 0xff) < '0') || ((pt & 0xff) > '9')) return 0; pt >>= 8;
if (((pt & 0xff) < '0') || ((pt & 0xff) > '9')) return 0; pt >>= 8;
if (((pt & 0xff) < '0') || ((pt & 0xff) > '9')) return 0; pt >>= 8;
if (((pt & 0xff) < '0') || ((pt & 0xff) > '9')) return 0;
u8 j = 0;
pt = rc4_next_4 (rc4_key, timestamp_ct[5]);
j = rc4_next_16 (rc4_key, 0, j, timestamp_ct + 0, out);
if (((pt & 0xff) < '0') || ((pt & 0xff) > '9')) return 0; pt >>= 8;
if (((pt & 0xff) < '0') || ((pt & 0xff) > '9')) return 0; pt >>= 8;
if (((pt & 0xff) < '0') || ((pt & 0xff) > '9')) return 0; pt >>= 8;
if (((pt & 0xff) < '0') || ((pt & 0xff) > '9')) return 0;
if ((out[3] & 0xffff0000) != 0x30320000) return 0;
pt = rc4_next_4 (rc4_key, timestamp_ct[6]);
j = rc4_next_16 (rc4_key, 16, j, timestamp_ct + 4, out);
if (((pt & 0xff) < '0') || ((pt & 0xff) > '9')) return 0; pt >>= 8;
if (((pt & 0xff) < '0') || ((pt & 0xff) > '9')) return 0; pt >>= 8;
if (((pt & 0xff) < '0') || ((pt & 0xff) > '9')) return 0; pt >>= 8;
if (((pt & 0xff) < '0') || ((pt & 0xff) > '9')) return 0;
if (((out[0] & 0xff) < '0') || ((out[0] & 0xff) > '9')) return 0; out[0] >>= 8;
if (((out[0] & 0xff) < '0') || ((out[0] & 0xff) > '9')) return 0; out[0] >>= 8;
if (((out[0] & 0xff) < '0') || ((out[0] & 0xff) > '9')) return 0; out[0] >>= 8;
if (((out[0] & 0xff) < '0') || ((out[0] & 0xff) > '9')) return 0;
if (((out[1] & 0xff) < '0') || ((out[1] & 0xff) > '9')) return 0; out[1] >>= 8;
if (((out[1] & 0xff) < '0') || ((out[1] & 0xff) > '9')) return 0; out[1] >>= 8;
if (((out[1] & 0xff) < '0') || ((out[1] & 0xff) > '9')) return 0; out[1] >>= 8;
if (((out[1] & 0xff) < '0') || ((out[1] & 0xff) > '9')) return 0;
if (((out[2] & 0xff) < '0') || ((out[2] & 0xff) > '9')) return 0; out[2] >>= 8;
if (((out[2] & 0xff) < '0') || ((out[2] & 0xff) > '9')) return 0; out[2] >>= 8;
if (((out[2] & 0xff) < '0') || ((out[2] & 0xff) > '9')) return 0; out[2] >>= 8;
if (((out[2] & 0xff) < '0') || ((out[2] & 0xff) > '9')) return 0;
return 1;
}

156
OpenCL/m07500_a1.cl
Unescape View File

@ -21,8 +21,7 @@ typedef struct
{
u8 S[256];
u8 i;
u8 j;
u32 wtf_its_faster;
} RC4_KEY;
@ -37,137 +36,132 @@ static void swap (__local RC4_KEY *rc4_key, const u8 i, const u8 j)
static void rc4_init_16 (__local RC4_KEY *rc4_key, const u32 data[4])
{
u32 i;
u32 v = 0x03020100;
u32 a = 0x04040404;
#pragma unroll 256
for (i = 0; i < 256; i += 1) rc4_key->S[i] = i;
__local u32 *ptr = (__local u32 *) rc4_key->S;
u8 j = 0;
#pragma unroll
for (u32 i = 0; i < 64; i++)
{
*ptr++ = v; v += a;
}
#pragma unroll 16
for (i = 0; i < 256; i += 16)
u32 j = 0;
for (u32 i = 0; i < 16; i++)
{
u32 idx = i;
u32 idx = i * 16;
u32 v;
v = data[0];
j += rc4_key->S[idx] + (v >> 0); swap (rc4_key, idx, j); idx++;
j += rc4_key->S[idx] + (v >> 8); swap (rc4_key, idx, j); idx++;
j += rc4_key->S[idx] + (v >> 16); swap (rc4_key, idx, j); idx++;
j += rc4_key->S[idx] + (v >> 24); swap (rc4_key, idx, j); idx++;
j += rc4_key->S[idx] + (v >> 0); swap (rc4_key, idx, j); idx++;
j += rc4_key->S[idx] + (v >> 8); swap (rc4_key, idx, j); idx++;
j += rc4_key->S[idx] + (v >> 16); swap (rc4_key, idx, j); idx++;
j += rc4_key->S[idx] + (v >> 24); swap (rc4_key, idx, j); idx++;
v = data[1];
j += rc4_key->S[idx] + (v >> 0); swap (rc4_key, idx, j); idx++;
j += rc4_key->S[idx] + (v >> 8); swap (rc4_key, idx, j); idx++;
j += rc4_key->S[idx] + (v >> 16); swap (rc4_key, idx, j); idx++;
j += rc4_key->S[idx] + (v >> 24); swap (rc4_key, idx, j); idx++;
j += rc4_key->S[idx] + (v >> 0); swap (rc4_key, idx, j); idx++;
j += rc4_key->S[idx] + (v >> 8); swap (rc4_key, idx, j); idx++;
j += rc4_key->S[idx] + (v >> 16); swap (rc4_key, idx, j); idx++;
j += rc4_key->S[idx] + (v >> 24); swap (rc4_key, idx, j); idx++;
v = data[2];
j += rc4_key->S[idx] + (v >> 0); swap (rc4_key, idx, j); idx++;
j += rc4_key->S[idx] + (v >> 8); swap (rc4_key, idx, j); idx++;
j += rc4_key->S[idx] + (v >> 16); swap (rc4_key, idx, j); idx++;
j += rc4_key->S[idx] + (v >> 24); swap (rc4_key, idx, j); idx++;
j += rc4_key->S[idx] + (v >> 0); swap (rc4_key, idx, j); idx++;
j += rc4_key->S[idx] + (v >> 8); swap (rc4_key, idx, j); idx++;
j += rc4_key->S[idx] + (v >> 16); swap (rc4_key, idx, j); idx++;
j += rc4_key->S[idx] + (v >> 24); swap (rc4_key, idx, j); idx++;
v = data[3];
j += rc4_key->S[idx] + (v >> 0); swap (rc4_key, idx, j); idx++;
j += rc4_key->S[idx] + (v >> 8); swap (rc4_key, idx, j); idx++;
j += rc4_key->S[idx] + (v >> 16); swap (rc4_key, idx, j); idx++;
j += rc4_key->S[idx] + (v >> 24); swap (rc4_key, idx, j); idx++;
j += rc4_key->S[idx] + (v >> 0); swap (rc4_key, idx, j); idx++;
j += rc4_key->S[idx] + (v >> 8); swap (rc4_key, idx, j); idx++;
j += rc4_key->S[idx] + (v >> 16); swap (rc4_key, idx, j); idx++;
j += rc4_key->S[idx] + (v >> 24); swap (rc4_key, idx, j); idx++;
}
rc4_key->i = 0;
rc4_key->j = 0;
}
static u32 rc4_next_4 (__local RC4_KEY *rc4_key, const u32 ct)
static u8 rc4_next_16 (__local RC4_KEY *rc4_key, u8 i, u8 j, const u32 in[4], u32 out[4])
{
u8 idx;
u32 xor4 = 0;
#pragma unroll
for (u32 k = 0; k < 4; k++)
{
u32 xor4 = 0;
u8 i = rc4_key->i;
u8 j = rc4_key->j;
u8 idx;
i += 1;
j += rc4_key->S[i];
i += 1;
j += rc4_key->S[i];
swap (rc4_key, i, j);
swap (rc4_key, i, j);
idx = rc4_key->S[i] + rc4_key->S[j];
idx = rc4_key->S[i] + rc4_key->S[j];
xor4 |= rc4_key->S[idx] << 0;
xor4 |= rc4_key->S[idx] << 0;
i += 1;
j += rc4_key->S[i];
i += 1;
j += rc4_key->S[i];
swap (rc4_key, i, j);
swap (rc4_key, i, j);
idx = rc4_key->S[i] + rc4_key->S[j];
idx = rc4_key->S[i] + rc4_key->S[j];
xor4 |= rc4_key->S[idx] << 8;
xor4 |= rc4_key->S[idx] << 8;
i += 1;
j += rc4_key->S[i];
i += 1;
j += rc4_key->S[i];
swap (rc4_key, i, j);
swap (rc4_key, i, j);
idx = rc4_key->S[i] + rc4_key->S[j];
idx = rc4_key->S[i] + rc4_key->S[j];
xor4 |= rc4_key->S[idx] << 16;
xor4 |= rc4_key->S[idx] << 16;
i += 1;
j += rc4_key->S[i];
i += 1;
j += rc4_key->S[i];
swap (rc4_key, i, j);
swap (rc4_key, i, j);
idx = rc4_key->S[i] + rc4_key->S[j];
idx = rc4_key->S[i] + rc4_key->S[j];
xor4 |= rc4_key->S[idx] << 24;
xor4 |= rc4_key->S[idx] << 24;
rc4_key->i = i;
rc4_key->j = j;
out[k] = in[k] ^ xor4;
}
return ct ^ xor4;
return j;
}
static int decrypt_and_check (__local RC4_KEY *rc4_key, u32 data[4], u32 timestamp_ct[8])
{
u32 pt;
rc4_init_16 (rc4_key, data);
pt = rc4_next_4 (rc4_key, timestamp_ct[0]);
pt = rc4_next_4 (rc4_key, timestamp_ct[1]);
pt = rc4_next_4 (rc4_key, timestamp_ct[2]);
pt = rc4_next_4 (rc4_key, timestamp_ct[3]);
u32 out[4];
if ((pt & 0xffff0000) != 0x30320000) return 0;
pt = rc4_next_4 (rc4_key, timestamp_ct[4]);
if (((pt & 0xff) < '0') || ((pt & 0xff) > '9')) return 0; pt >>= 8;
if (((pt & 0xff) < '0') || ((pt & 0xff) > '9')) return 0; pt >>= 8;
if (((pt & 0xff) < '0') || ((pt & 0xff) > '9')) return 0; pt >>= 8;
if (((pt & 0xff) < '0') || ((pt & 0xff) > '9')) return 0;
u8 j = 0;
pt = rc4_next_4 (rc4_key, timestamp_ct[5]);
j = rc4_next_16 (rc4_key, 0, j, timestamp_ct + 0, out);
if (((pt & 0xff) < '0') || ((pt & 0xff) > '9')) return 0; pt >>= 8;
if (((pt & 0xff) < '0') || ((pt & 0xff) > '9')) return 0; pt >>= 8;
if (((pt & 0xff) < '0') || ((pt & 0xff) > '9')) return 0; pt >>= 8;
if (((pt & 0xff) < '0') || ((pt & 0xff) > '9')) return 0;
if ((out[3] & 0xffff0000) != 0x30320000) return 0;
pt = rc4_next_4 (rc4_key, timestamp_ct[6]);
j = rc4_next_16 (rc4_key, 16, j, timestamp_ct + 4, out);
if (((pt & 0xff) < '0') || ((pt & 0xff) > '9')) return 0; pt >>= 8;
if (((pt & 0xff) < '0') || ((pt & 0xff) > '9')) return 0; pt >>= 8;
if (((pt & 0xff) < '0') || ((pt & 0xff) > '9')) return 0; pt >>= 8;
if (((pt & 0xff) < '0') || ((pt & 0xff) > '9')) return 0;
if (((out[0] & 0xff) < '0') || ((out[0] & 0xff) > '9')) return 0; out[0] >>= 8;
if (((out[0] & 0xff) < '0') || ((out[0] & 0xff) > '9')) return 0; out[0] >>= 8;
if (((out[0] & 0xff) < '0') || ((out[0] & 0xff) > '9')) return 0; out[0] >>= 8;
if (((out[0] & 0xff) < '0') || ((out[0] & 0xff) > '9')) return 0;
if (((out[1] & 0xff) < '0') || ((out[1] & 0xff) > '9')) return 0; out[1] >>= 8;
if (((out[1] & 0xff) < '0') || ((out[1] & 0xff) > '9')) return 0; out[1] >>= 8;
if (((out[1] & 0xff) < '0') || ((out[1] & 0xff) > '9')) return 0; out[1] >>= 8;
if (((out[1] & 0xff) < '0') || ((out[1] & 0xff) > '9')) return 0;
if (((out[2] & 0xff) < '0') || ((out[2] & 0xff) > '9')) return 0; out[2] >>= 8;
if (((out[2] & 0xff) < '0') || ((out[2] & 0xff) > '9')) return 0; out[2] >>= 8;
if (((out[2] & 0xff) < '0') || ((out[2] & 0xff) > '9')) return 0; out[2] >>= 8;
if (((out[2] & 0xff) < '0') || ((out[2] & 0xff) > '9')) return 0;
return 1;
}

156
OpenCL/m07500_a3.cl
Unescape View File

@ -21,8 +21,7 @@ typedef struct
{
u8 S[256];
u8 i;
u8 j;
u32 wtf_its_faster;
} RC4_KEY;
@ -37,137 +36,132 @@ static void swap (__local RC4_KEY *rc4_key, const u8 i, const u8 j)
static void rc4_init_16 (__local RC4_KEY *rc4_key, const u32 data[4])
{
u32 i;
u32 v = 0x03020100;
u32 a = 0x04040404;
#pragma unroll 256
for (i = 0; i < 256; i += 1) rc4_key->S[i] = i;
__local u32 *ptr = (__local u32 *) rc4_key->S;
u8 j = 0;
#pragma unroll
for (u32 i = 0; i < 64; i++)
{
*ptr++ = v; v += a;
}
#pragma unroll 16
for (i = 0; i < 256; i += 16)
u32 j = 0;
for (u32 i = 0; i < 16; i++)
{
u32 idx = i;
u32 idx = i * 16;
u32 v;
v = data[0];
j += rc4_key->S[idx] + (v >> 0); swap (rc4_key, idx, j); idx++;
j += rc4_key->S[idx] + (v >> 8); swap (rc4_key, idx, j); idx++;
j += rc4_key->S[idx] + (v >> 16); swap (rc4_key, idx, j); idx++;
j += rc4_key->S[idx] + (v >> 24); swap (rc4_key, idx, j); idx++;
j += rc4_key->S[idx] + (v >> 0); swap (rc4_key, idx, j); idx++;
j += rc4_key->S[idx] + (v >> 8); swap (rc4_key, idx, j); idx++;
j += rc4_key->S[idx] + (v >> 16); swap (rc4_key, idx, j); idx++;
j += rc4_key->S[idx] + (v >> 24); swap (rc4_key, idx, j); idx++;
v = data[1];
j += rc4_key->S[idx] + (v >> 0); swap (rc4_key, idx, j); idx++;
j += rc4_key->S[idx] + (v >> 8); swap (rc4_key, idx, j); idx++;
j += rc4_key->S[idx] + (v >> 16); swap (rc4_key, idx, j); idx++;
j += rc4_key->S[idx] + (v >> 24); swap (rc4_key, idx, j); idx++;
j += rc4_key->S[idx] + (v >> 0); swap (rc4_key, idx, j); idx++;
j += rc4_key->S[idx] + (v >> 8); swap (rc4_key, idx, j); idx++;
j += rc4_key->S[idx] + (v >> 16); swap (rc4_key, idx, j); idx++;
j += rc4_key->S[idx] + (v >> 24); swap (rc4_key, idx, j); idx++;
v = data[2];
j += rc4_key->S[idx] + (v >> 0); swap (rc4_key, idx, j); idx++;
j += rc4_key->S[idx] + (v >> 8); swap (rc4_key, idx, j); idx++;
j += rc4_key->S[idx] + (v >> 16); swap (rc4_key, idx, j); idx++;
j += rc4_key->S[idx] + (v >> 24); swap (rc4_key, idx, j); idx++;
j += rc4_key->S[idx] + (v >> 0); swap (rc4_key, idx, j); idx++;
j += rc4_key->S[idx] + (v >> 8); swap (rc4_key, idx, j); idx++;
j += rc4_key->S[idx] + (v >> 16); swap (rc4_key, idx, j); idx++;
j += rc4_key->S[idx] + (v >> 24); swap (rc4_key, idx, j); idx++;
v = data[3];
j += rc4_key->S[idx] + (v >> 0); swap (rc4_key, idx, j); idx++;
j += rc4_key->S[idx] + (v >> 8); swap (rc4_key, idx, j); idx++;
j += rc4_key->S[idx] + (v >> 16); swap (rc4_key, idx, j); idx++;
j += rc4_key->S[idx] + (v >> 24); swap (rc4_key, idx, j); idx++;
j += rc4_key->S[idx] + (v >> 0); swap (rc4_key, idx, j); idx++;
j += rc4_key->S[idx] + (v >> 8); swap (rc4_key, idx, j); idx++;
j += rc4_key->S[idx] + (v >> 16); swap (rc4_key, idx, j); idx++;
j += rc4_key->S[idx] + (v >> 24); swap (rc4_key, idx, j); idx++;
}
rc4_key->i = 0;
rc4_key->j = 0;
}
static u32 rc4_next_4 (__local RC4_KEY *rc4_key, const u32 ct)
static u8 rc4_next_16 (__local RC4_KEY *rc4_key, u8 i, u8 j, const u32 in[4], u32 out[4])
{
u8 idx;
u32 xor4 = 0;
#pragma unroll
for (u32 k = 0; k < 4; k++)
{
u32 xor4 = 0;
u8 i = rc4_key->i;
u8 j = rc4_key->j;
u8 idx;
i += 1;
j += rc4_key->S[i];
i += 1;
j += rc4_key->S[i];
swap (rc4_key, i, j);
swap (rc4_key, i, j);
idx = rc4_key->S[i] + rc4_key->S[j];
idx = rc4_key->S[i] + rc4_key->S[j];
xor4 |= rc4_key->S[idx] << 0;
xor4 |= rc4_key->S[idx] << 0;
i += 1;
j += rc4_key->S[i];
i += 1;
j += rc4_key->S[i];
swap (rc4_key, i, j);
swap (rc4_key, i, j);
idx = rc4_key->S[i] + rc4_key->S[j];
idx = rc4_key->S[i] + rc4_key->S[j];
xor4 |= rc4_key->S[idx] << 8;
xor4 |= rc4_key->S[idx] << 8;
i += 1;
j += rc4_key->S[i];
i += 1;
j += rc4_key->S[i];
swap (rc4_key, i, j);
swap (rc4_key, i, j);
idx = rc4_key->S[i] + rc4_key->S[j];
idx = rc4_key->S[i] + rc4_key->S[j];
xor4 |= rc4_key->S[idx] << 16;
xor4 |= rc4_key->S[idx] << 16;
i += 1;
j += rc4_key->S[i];
i += 1;
j += rc4_key->S[i];
swap (rc4_key, i, j);
swap (rc4_key, i, j);
idx = rc4_key->S[i] + rc4_key->S[j];
idx = rc4_key->S[i] + rc4_key->S[j];
xor4 |= rc4_key->S[idx] << 24;
xor4 |= rc4_key->S[idx] << 24;
rc4_key->i = i;
rc4_key->j = j;
out[k] = in[k] ^ xor4;
}
return ct ^ xor4;
return j;
}
static int decrypt_and_check (__local RC4_KEY *rc4_key, u32 data[4], u32 timestamp_ct[8])
{
u32 pt;
rc4_init_16 (rc4_key, data);
pt = rc4_next_4 (rc4_key, timestamp_ct[0]);
pt = rc4_next_4 (rc4_key, timestamp_ct[1]);
pt = rc4_next_4 (rc4_key, timestamp_ct[2]);
pt = rc4_next_4 (rc4_key, timestamp_ct[3]);
u32 out[4];
if ((pt & 0xffff0000) != 0x30320000) return 0;
pt = rc4_next_4 (rc4_key, timestamp_ct[4]);
if (((pt & 0xff) < '0') || ((pt & 0xff) > '9')) return 0; pt >>= 8;
if (((pt & 0xff) < '0') || ((pt & 0xff) > '9')) return 0; pt >>= 8;
if (((pt & 0xff) < '0') || ((pt & 0xff) > '9')) return 0; pt >>= 8;
if (((pt & 0xff) < '0') || ((pt & 0xff) > '9')) return 0;
u8 j = 0;
pt = rc4_next_4 (rc4_key, timestamp_ct[5]);
j = rc4_next_16 (rc4_key, 0, j, timestamp_ct + 0, out);
if (((pt & 0xff) < '0') || ((pt & 0xff) > '9')) return 0; pt >>= 8;
if (((pt & 0xff) < '0') || ((pt & 0xff) > '9')) return 0; pt >>= 8;
if (((pt & 0xff) < '0') || ((pt & 0xff) > '9')) return 0; pt >>= 8;
if (((pt & 0xff) < '0') || ((pt & 0xff) > '9')) return 0;
if ((out[3] & 0xffff0000) != 0x30320000) return 0;
pt = rc4_next_4 (rc4_key, timestamp_ct[6]);
j = rc4_next_16 (rc4_key, 16, j, timestamp_ct + 4, out);
if (((pt & 0xff) < '0') || ((pt & 0xff) > '9')) return 0; pt >>= 8;
if (((pt & 0xff) < '0') || ((pt & 0xff) > '9')) return 0; pt >>= 8;
if (((pt & 0xff) < '0') || ((pt & 0xff) > '9')) return 0; pt >>= 8;
if (((pt & 0xff) < '0') || ((pt & 0xff) > '9')) return 0;
if (((out[0] & 0xff) < '0') || ((out[0] & 0xff) > '9')) return 0; out[0] >>= 8;
if (((out[0] & 0xff) < '0') || ((out[0] & 0xff) > '9')) return 0; out[0] >>= 8;
if (((out[0] & 0xff) < '0') || ((out[0] & 0xff) > '9')) return 0; out[0] >>= 8;
if (((out[0] & 0xff) < '0') || ((out[0] & 0xff) > '9')) return 0;
if (((out[1] & 0xff) < '0') || ((out[1] & 0xff) > '9')) return 0; out[1] >>= 8;
if (((out[1] & 0xff) < '0') || ((out[1] & 0xff) > '9')) return 0; out[1] >>= 8;
if (((out[1] & 0xff) < '0') || ((out[1] & 0xff) > '9')) return 0; out[1] >>= 8;
if (((out[1] & 0xff) < '0') || ((out[1] & 0xff) > '9')) return 0;
if (((out[2] & 0xff) < '0') || ((out[2] & 0xff) > '9')) return 0; out[2] >>= 8;
if (((out[2] & 0xff) < '0') || ((out[2] & 0xff) > '9')) return 0; out[2] >>= 8;
if (((out[2] & 0xff) < '0') || ((out[2] & 0xff) > '9')) return 0; out[2] >>= 8;
if (((out[2] & 0xff) < '0') || ((out[2] & 0xff) > '9')) return 0;
return 1;
}

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