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https://github.com/data61/MP-SPDZ.git
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110 lines
2.7 KiB
C++
110 lines
2.7 KiB
C++
// (C) 2016 University of Bristol. See License.txt
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/*
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* MMO.cpp
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*
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*
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*/
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#include "MMO.h"
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#include "Math/gf2n.h"
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#include "Math/gfp.h"
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#include "Math/bigint.h"
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#include <unistd.h>
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void MMO::zeroIV()
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{
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octet key[AES_BLK_SIZE];
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memset(key,0,AES_BLK_SIZE*sizeof(octet));
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setIV(key);
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}
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void MMO::setIV(octet key[AES_BLK_SIZE])
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{
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aes_schedule(IV,key);
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}
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template <>
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void MMO::hashOneBlock<gf2n>(octet* output, octet* input)
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{
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__m128i in = _mm_loadu_si128((__m128i*)input);
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__m128i ct = aes_encrypt(in, IV);
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// __m128i out = ct ^ in;
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_mm_storeu_si128((__m128i*)output, ct);
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}
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template <>
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void MMO::hashOneBlock<gfp>(octet* output, octet* input)
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{
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__m128i in = _mm_loadu_si128((__m128i*)input);
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__m128i ct = aes_encrypt(in, IV);
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while (mpn_cmp((mp_limb_t*)&ct, gfp::get_ZpD().get_prA(), gfp::t()) >= 0)
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ct = aes_encrypt(ct, IV);
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_mm_storeu_si128((__m128i*)output, ct);
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}
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template <>
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void MMO::hashBlockWise<gf2n,128>(octet* output, octet* input)
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{
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for (int i = 0; i < 16; i++)
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ecb_aes_128_encrypt<8>(&((__m128i*)output)[i*8], &((__m128i*)input)[i*8], IV);
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}
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template <>
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void MMO::hashBlockWise<gfp,128>(octet* output, octet* input)
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{
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for (int i = 0; i < 16; i++)
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{
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__m128i* in = &((__m128i*)input)[i*8];
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__m128i* out = &((__m128i*)output)[i*8];
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ecb_aes_128_encrypt<8>(out, in, IV);
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int left = 8;
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int indices[8] = {0, 1, 2, 3, 4, 5, 6, 7};
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while (left)
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{
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int now_left = 0;
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for (int j = 0; j < left; j++)
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if (mpn_cmp((mp_limb_t*)&out[indices[j]], gfp::get_ZpD().get_prA(), gfp::t()) >= 0)
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{
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indices[now_left] = indices[j];
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now_left++;
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}
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left = now_left;
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// and now my favorite hack
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switch (left) {
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case 8:
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ecb_aes_128_encrypt<8>(out, out, IV, indices);
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break;
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case 7:
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ecb_aes_128_encrypt<7>(out, out, IV, indices);
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break;
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case 6:
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ecb_aes_128_encrypt<6>(out, out, IV, indices);
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break;
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case 5:
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ecb_aes_128_encrypt<5>(out, out, IV, indices);
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break;
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case 4:
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ecb_aes_128_encrypt<4>(out, out, IV, indices);
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break;
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case 3:
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ecb_aes_128_encrypt<3>(out, out, IV, indices);
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break;
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case 2:
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ecb_aes_128_encrypt<2>(out, out, IV, indices);
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break;
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case 1:
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ecb_aes_128_encrypt<1>(out, out, IV, indices);
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break;
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default:
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break;
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}
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}
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}
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}
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