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Remove unopt_gf_mul

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This commit is contained in:
Olivier Chéron 2019-05-19 09:08:06 +02:00
parent 76ba39fc95
commit cddbc2cef9
1 changed files with 2 additions and 23 deletions
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25
cbits/aes/x86ni.c
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@ -35,6 +35,7 @@
#include <string.h>
#include <cryptonite_aes.h>
#include <cryptonite_cpu.h>
#include <aes/gf.h>
#include <aes/x86ni.h>
#include <aes/block128.h>
@ -157,28 +158,6 @@ static __m128i gfmulx(__m128i v)
return v;
}
static void unopt_gf_mul(block128 *a, block128 *b)
{
uint64_t a0, a1, v0, v1;
int i, j;
a0 = a1 = 0;
v0 = cpu_to_be64(a->q[0]);
v1 = cpu_to_be64(a->q[1]);
for (i = 0; i < 16; i++)
for (j = 0x80; j != 0; j >>= 1) {
uint8_t x = b->b[i] & j;
a0 ^= x ? v0 : 0;
a1 ^= x ? v1 : 0;
x = (uint8_t) v1 & 1;
v1 = (v1 >> 1) | (v0 << 63);
v0 = (v0 >> 1) ^ (x ? (0xe1ULL << 56) : 0);
}
a->q[0] = cpu_to_be64(a0);
a->q[1] = cpu_to_be64(a1);
}
static __m128i ghash_add(__m128i tag, __m128i h, __m128i m)
{
aes_block _t, _h;
@ -186,7 +165,7 @@ static __m128i ghash_add(__m128i tag, __m128i h, __m128i m)
_mm_store_si128((__m128i *) &_t, tag);
_mm_store_si128((__m128i *) &_h, h);
unopt_gf_mul(&_t, &_h);
cryptonite_gf_mul(&_t, &_h);
tag = _mm_load_si128((__m128i *) &_t);
return tag;
}