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Windows: Add implementation of ChaCha20 based random generator. Use it for driver need of random bytes (currently only wipe bytes but more to come later).

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This commit is contained in:
Mounir IDRASSI
2019-02-08 01:48:12 +01:00
parent e5b9cee868
commit ba5da0946c
17 changed files with 1015 additions and 37 deletions
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102
src/Crypto/chacha_u1.h Normal file
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/*
u1.h version $Date: 2014/09/08 17:44:28 $
D. J. Bernstein
Romain Dolbeau
Public domain.
*/
// Modified by kerukuro for use in cppcrypto.
// if (!bytes) return;
while (bytes >=64) {
__m128i x_0, x_1, x_2, x_3;
__m128i t_1;
const __m128i rot16 = _mm_set_epi8(13,12,15,14,9,8,11,10,5,4,7,6,1,0,3,2);
const __m128i rot8 = _mm_set_epi8(14,13,12,15,10,9,8,11,6,5,4,7,2,1,0,3);
uint32 in12, in13;
x_0 = _mm_load_si128((__m128i*)(x + 0));
x_1 = _mm_load_si128((__m128i*)(x + 4));
x_2 = _mm_load_si128((__m128i*)(x + 8));
x_3 = _mm_load_si128((__m128i*)(x + 12));
for (i = 0 ; i < r ; ++i) {
x_0 = _mm_add_epi32(x_0, x_1);
x_3 = _mm_xor_si128(x_3, x_0);
x_3 = _mm_shuffle_epi8(x_3, rot16);
x_2 = _mm_add_epi32(x_2, x_3);
x_1 = _mm_xor_si128(x_1, x_2);
t_1 = x_1;
x_1 = _mm_slli_epi32(x_1, 12);
t_1 = _mm_srli_epi32(t_1, 20);
x_1 = _mm_xor_si128(x_1, t_1);
x_0 = _mm_add_epi32(x_0, x_1);
x_3 = _mm_xor_si128(x_3, x_0);
x_0 = _mm_shuffle_epi32(x_0, 0x93);
x_3 = _mm_shuffle_epi8(x_3, rot8);
x_2 = _mm_add_epi32(x_2, x_3);
x_3 = _mm_shuffle_epi32(x_3, 0x4e);
x_1 = _mm_xor_si128(x_1, x_2);
x_2 = _mm_shuffle_epi32(x_2, 0x39);
t_1 = x_1;
x_1 = _mm_slli_epi32(x_1, 7);
t_1 = _mm_srli_epi32(t_1, 25);
x_1 = _mm_xor_si128(x_1, t_1);
x_0 = _mm_add_epi32(x_0, x_1);
x_3 = _mm_xor_si128(x_3, x_0);
x_3 = _mm_shuffle_epi8(x_3, rot16);
x_2 = _mm_add_epi32(x_2, x_3);
x_1 = _mm_xor_si128(x_1, x_2);
t_1 = x_1;
x_1 = _mm_slli_epi32(x_1, 12);
t_1 = _mm_srli_epi32(t_1, 20);
x_1 = _mm_xor_si128(x_1, t_1);
x_0 = _mm_add_epi32(x_0, x_1);
x_3 = _mm_xor_si128(x_3, x_0);
x_0 = _mm_shuffle_epi32(x_0, 0x39);
x_3 = _mm_shuffle_epi8(x_3, rot8);
x_2 = _mm_add_epi32(x_2, x_3);
x_3 = _mm_shuffle_epi32(x_3, 0x4e);
x_1 = _mm_xor_si128(x_1, x_2);
x_2 = _mm_shuffle_epi32(x_2, 0x93);
t_1 = x_1;
x_1 = _mm_slli_epi32(x_1, 7);
t_1 = _mm_srli_epi32(t_1, 25);
x_1 = _mm_xor_si128(x_1, t_1);
}
x_0 = _mm_add_epi32(x_0, _mm_loadu_si128((__m128i*)(x + 0)));
x_1 = _mm_add_epi32(x_1, _mm_loadu_si128((__m128i*)(x + 4)));
x_2 = _mm_add_epi32(x_2, _mm_loadu_si128((__m128i*)(x + 8)));
x_3 = _mm_add_epi32(x_3, _mm_loadu_si128((__m128i*)(x + 12)));
x_0 = _mm_xor_si128(x_0, _mm_loadu_si128((__m128i*)(m + 0)));
x_1 = _mm_xor_si128(x_1, _mm_loadu_si128((__m128i*)(m + 16)));
x_2 = _mm_xor_si128(x_2, _mm_loadu_si128((__m128i*)(m + 32)));
x_3 = _mm_xor_si128(x_3, _mm_loadu_si128((__m128i*)(m + 48)));
_mm_storeu_si128((__m128i*)(out + 0), x_0);
_mm_storeu_si128((__m128i*)(out + 16), x_1);
_mm_storeu_si128((__m128i*)(out + 32), x_2);
_mm_storeu_si128((__m128i*)(out + 48), x_3);
in12 = x[12];
in13 = x[13];
in12 ++;
if (in12 == 0)
in13 ++;
x[12] = in12;
x[13] = in13;
bytes -= 64;
out += 64;
m += 64;
}