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Merge pull request #890 from matrix/aesMods

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OpenCL AES optimizations
This commit is contained in:
Jens Steube 2016-11-29 21:18:45 +01:00 committed by GitHub
commit b60a335482
1 changed files with 37 additions and 46 deletions
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65
OpenCL/inc_cipher_aes256.cl
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@ -704,39 +704,34 @@ static void aes256_ExpandKey (u32 *ks, const u32 *ukey)
int i;
int j;
i = 0;
j = 0;
while (1)
for (int i = 0, j = 0; i < 7; i += 1, j += 8)
{
u32 temp = ks[j + 7];
const u32 temp1 = ks[j + 7];
ks[j + 8] = ks[j + 0]
^ (te2[(temp >> 16) & 0xff] & 0xff000000)
^ (te3[(temp >> 8) & 0xff] & 0x00ff0000)
^ (te0[(temp >> 0) & 0xff] & 0x0000ff00)
^ (te1[(temp >> 24) & 0xff] & 0x000000ff)
^ (te2[(temp1 >> 16) & 0xff] & 0xff000000)
^ (te3[(temp1 >> 8) & 0xff] & 0x00ff0000)
^ (te0[(temp1 >> 0) & 0xff] & 0x0000ff00)
^ (te1[(temp1 >> 24) & 0xff] & 0x000000ff)
^ rcon[i];
ks[j + 9] = ks[j + 1] ^ ks[j + 8];
ks[j + 10] = ks[j + 2] ^ ks[j + 9];
ks[j + 11] = ks[j + 3] ^ ks[j + 10];
if (++i == 7) break;
if (i == 6) continue;
temp = ks[j + 11];
const u32 temp2 = ks[j + 11];
ks[j + 12] = ks[j + 4]
^ (te2[(temp >> 24) & 0xff] & 0xff000000)
^ (te3[(temp >> 16) & 0xff] & 0x00ff0000)
^ (te0[(temp >> 8) & 0xff] & 0x0000ff00)
^ (te1[(temp >> 0) & 0xff] & 0x000000ff);
^ (te2[(temp2 >> 24) & 0xff] & 0xff000000)
^ (te3[(temp2 >> 16) & 0xff] & 0x00ff0000)
^ (te0[(temp2 >> 8) & 0xff] & 0x0000ff00)
^ (te1[(temp2 >> 0) & 0xff] & 0x000000ff);
ks[j + 13] = ks[j + 5] ^ ks[j + 12];
ks[j + 14] = ks[j + 6] ^ ks[j + 13];
ks[j + 15] = ks[j + 7] ^ ks[j + 14];
j += 8;
}
}
@ -816,17 +811,15 @@ static void aes256_set_decrypt_key (u32 *ks, const u32 *ukey)
static void aes256_decrypt (const u32 *ks, const u32 *in, u32 *out)
{
u32 in_s[4];
u32 s0 = swap32 (in[0]);
u32 s1 = swap32 (in[1]);
u32 s2 = swap32 (in[2]);
u32 s3 = swap32 (in[3]);
in_s[0] = swap32 (in[0]);
in_s[1] = swap32 (in[1]);
in_s[2] = swap32 (in[2]);
in_s[3] = swap32 (in[3]);
u32 s0 = in_s[0] ^ ks[0];
u32 s1 = in_s[1] ^ ks[1];
u32 s2 = in_s[2] ^ ks[2];
u32 s3 = in_s[3] ^ ks[3];
s0 ^= ks[0];
s1 ^= ks[1];
s2 ^= ks[2];
s3 ^= ks[3];
u32 t0;
u32 t1;
@ -918,17 +911,15 @@ static void aes256_decrypt (const u32 *ks, const u32 *in, u32 *out)
static void aes256_encrypt (const u32 *ks, const u32 *in, u32 *out)
{
u32 in_s[4];
u32 s0 = swap32 (in[0]);
u32 s1 = swap32 (in[1]);
u32 s2 = swap32 (in[2]);
u32 s3 = swap32 (in[3]);
in_s[0] = swap32 (in[0]);
in_s[1] = swap32 (in[1]);
in_s[2] = swap32 (in[2]);
in_s[3] = swap32 (in[3]);
u32 s0 = in_s[0] ^ ks[0];
u32 s1 = in_s[1] ^ ks[1];
u32 s2 = in_s[2] ^ ks[2];
u32 s3 = in_s[3] ^ ks[3];
s0 ^= ks[0];
s1 ^= ks[1];
s2 ^= ks[2];
s3 ^= ks[3];
u32 t0;
u32 t1;