mirror of
https://github.com/QuasarApp/Qt-AES.git
synced 2025-04-28 06:34:33 +00:00
0ddf76d59a
* Pass expKey parameter of addRoundKey() by const reference to avoid unnecessary copy. * Use C++11 nullptr instead of NULL, make it clear that default value of iv parameter in encode() and decode() is empty QByteArray instead of implicit conversion from null pointer via QByteArray(const char *, int = -1) constructor. * Change parameter names in declarations of cipher(), invCipher() and byteXor() to match definitions. * Convert AES-NI-related files to headers, place functions with internal linkage to anonymous namespace to avoid exporting them, don't use inline specifier (inline keyword have different meaning in C++ rather than in C). * Use char literals instead of implementation-defined int-to-signed-char conversions where possible. * Set default value for padding argument in static RemovePadding() to match sample in README.
200 lines
7.1 KiB
C
200 lines
7.1 KiB
C
#ifndef AESNIKEYEXP_H
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#define AESNIKEYEXP_H
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#include <wmmintrin.h>
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#define cpuid(func, ax, bx, cx, dx)\
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__asm__ __volatile__("cpuid": "=a" (ax), "=b" (bx), "=c" (cx), "=d" (dx) : "a" (func));
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namespace {
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bool check_aesni_support()
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{
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unsigned int a,b,c,d;
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cpuid(1, a,b,c,d);
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return (c & 0x2000000);
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}
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__m128i AES_128_ASSIST (__m128i temp1, __m128i temp2)
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{
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__m128i temp3;
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temp2 = _mm_shuffle_epi32 (temp2 ,0xff);
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temp3 = _mm_slli_si128 (temp1, 0x4);
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temp1 = _mm_xor_si128 (temp1, temp3);
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temp3 = _mm_slli_si128 (temp3, 0x4);
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temp1 = _mm_xor_si128 (temp1, temp3);
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temp3 = _mm_slli_si128 (temp3, 0x4);
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temp1 = _mm_xor_si128 (temp1, temp3);
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temp1 = _mm_xor_si128 (temp1, temp2);
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return temp1;
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}
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void AES_128_Key_Expansion (const unsigned char *userkey,
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unsigned char *key)
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{
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__m128i temp1, temp2;
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__m128i *Key_Schedule = (__m128i*)key;
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temp1 = _mm_loadu_si128((__m128i*)userkey);
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Key_Schedule[0] = temp1;
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temp2 = _mm_aeskeygenassist_si128 (temp1 ,0x1);
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temp1 = AES_128_ASSIST(temp1, temp2);
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Key_Schedule[1] = temp1;
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temp2 = _mm_aeskeygenassist_si128 (temp1,0x2);
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temp1 = AES_128_ASSIST(temp1, temp2);
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Key_Schedule[2] = temp1;
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temp2 = _mm_aeskeygenassist_si128 (temp1,0x4);
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temp1 = AES_128_ASSIST(temp1, temp2);
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Key_Schedule[3] = temp1;
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temp2 = _mm_aeskeygenassist_si128 (temp1,0x8);
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temp1 = AES_128_ASSIST(temp1, temp2);
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Key_Schedule[4] = temp1;
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temp2 = _mm_aeskeygenassist_si128 (temp1,0x10);
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temp1 = AES_128_ASSIST(temp1, temp2);
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Key_Schedule[5] = temp1;
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temp2 = _mm_aeskeygenassist_si128 (temp1,0x20);
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temp1 = AES_128_ASSIST(temp1, temp2);
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Key_Schedule[6] = temp1;
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temp2 = _mm_aeskeygenassist_si128 (temp1,0x40);
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temp1 = AES_128_ASSIST(temp1, temp2);
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Key_Schedule[7] = temp1;
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temp2 = _mm_aeskeygenassist_si128 (temp1,0x80);
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temp1 = AES_128_ASSIST(temp1, temp2);
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Key_Schedule[8] = temp1;
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temp2 = _mm_aeskeygenassist_si128 (temp1,0x1b);
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temp1 = AES_128_ASSIST(temp1, temp2);
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Key_Schedule[9] = temp1;
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temp2 = _mm_aeskeygenassist_si128 (temp1,0x36);
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temp1 = AES_128_ASSIST(temp1, temp2);
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Key_Schedule[10] = temp1;
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}
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void KEY_192_ASSIST(__m128i* temp1, __m128i * temp2, __m128i * temp3)
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{
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__m128i temp4;
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*temp2 = _mm_shuffle_epi32 (*temp2, 0x55);
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temp4 = _mm_slli_si128 (*temp1, 0x4);
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*temp1 = _mm_xor_si128 (*temp1, temp4);
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temp4 = _mm_slli_si128 (temp4, 0x4);
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*temp1 = _mm_xor_si128 (*temp1, temp4);
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temp4 = _mm_slli_si128 (temp4, 0x4);
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*temp1 = _mm_xor_si128 (*temp1, temp4);
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*temp1 = _mm_xor_si128 (*temp1, *temp2);
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*temp2 = _mm_shuffle_epi32(*temp1, 0xff);
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temp4 = _mm_slli_si128 (*temp3, 0x4);
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*temp3 = _mm_xor_si128 (*temp3, temp4);
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*temp3 = _mm_xor_si128 (*temp3, *temp2);
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}
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void AES_192_Key_Expansion (const unsigned char *userkey, unsigned char *key)
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{
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__m128i temp1, temp2, temp3;
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__m128i *Key_Schedule = (__m128i*)key;
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temp1 = _mm_loadu_si128((__m128i*)userkey);
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temp3 = _mm_loadu_si128((__m128i*)(userkey+16));
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Key_Schedule[0]=temp1; Key_Schedule[1]=temp3;
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temp2=_mm_aeskeygenassist_si128 (temp3,0x1);
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KEY_192_ASSIST(&temp1, &temp2, &temp3);
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Key_Schedule[1] = (__m128i)_mm_shuffle_pd((__m128d)Key_Schedule[1], (__m128d)temp1,0);
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Key_Schedule[2] = (__m128i)_mm_shuffle_pd((__m128d)temp1,(__m128d)temp3,1);
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temp2=_mm_aeskeygenassist_si128 (temp3,0x2);
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KEY_192_ASSIST(&temp1, &temp2, &temp3);
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Key_Schedule[3]=temp1;
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Key_Schedule[4]=temp3;
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temp2=_mm_aeskeygenassist_si128 (temp3,0x4);
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KEY_192_ASSIST(&temp1, &temp2, &temp3);
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Key_Schedule[4] = (__m128i)_mm_shuffle_pd((__m128d)Key_Schedule[4], (__m128d)temp1,0);
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Key_Schedule[5] = (__m128i)_mm_shuffle_pd((__m128d)temp1,(__m128d)temp3,1);
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temp2=_mm_aeskeygenassist_si128 (temp3,0x8);
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KEY_192_ASSIST(&temp1, &temp2, &temp3);
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Key_Schedule[6]=temp1;
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Key_Schedule[7]=temp3;
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temp2=_mm_aeskeygenassist_si128 (temp3,0x10);
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KEY_192_ASSIST(&temp1, &temp2, &temp3);
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Key_Schedule[7] = (__m128i)_mm_shuffle_pd((__m128d)Key_Schedule[7], (__m128d)temp1,0);
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Key_Schedule[8] = (__m128i)_mm_shuffle_pd((__m128d)temp1,(__m128d)temp3,1);
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temp2=_mm_aeskeygenassist_si128 (temp3,0x20);
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KEY_192_ASSIST(&temp1, &temp2, &temp3);
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Key_Schedule[9]=temp1;
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Key_Schedule[10]=temp3;
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temp2=_mm_aeskeygenassist_si128 (temp3,0x40);
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KEY_192_ASSIST(&temp1, &temp2, &temp3);
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Key_Schedule[10] = (__m128i)_mm_shuffle_pd((__m128d)Key_Schedule[10], (__m128d)temp1,0);
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Key_Schedule[11] = (__m128i)_mm_shuffle_pd((__m128d)temp1,(__m128d)temp3,1);
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temp2=_mm_aeskeygenassist_si128 (temp3,0x80);
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KEY_192_ASSIST(&temp1, &temp2, &temp3);
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Key_Schedule[12]=temp1;
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}
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void KEY_256_ASSIST_1(__m128i* temp1, __m128i * temp2)
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{
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__m128i temp4;
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*temp2 = _mm_shuffle_epi32(*temp2, 0xff);
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temp4 = _mm_slli_si128 (*temp1, 0x4);
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*temp1 = _mm_xor_si128 (*temp1, temp4);
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temp4 = _mm_slli_si128 (temp4, 0x4);
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*temp1 = _mm_xor_si128 (*temp1, temp4);
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temp4 = _mm_slli_si128 (temp4, 0x4);
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*temp1 = _mm_xor_si128 (*temp1, temp4);
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*temp1 = _mm_xor_si128 (*temp1, *temp2);
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}
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void KEY_256_ASSIST_2(__m128i* temp1, __m128i * temp3)
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{
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__m128i temp2,temp4;
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temp4 = _mm_aeskeygenassist_si128 (*temp1, 0x0);
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temp2 = _mm_shuffle_epi32(temp4, 0xaa);
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temp4 = _mm_slli_si128 (*temp3, 0x4);
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*temp3 = _mm_xor_si128 (*temp3, temp4);
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temp4 = _mm_slli_si128 (temp4, 0x4);
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*temp3 = _mm_xor_si128 (*temp3, temp4);
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temp4 = _mm_slli_si128 (temp4, 0x4);
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*temp3 = _mm_xor_si128 (*temp3, temp4);
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*temp3 = _mm_xor_si128 (*temp3, temp2);
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}
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void AES_256_Key_Expansion (const unsigned char *userkey, unsigned char *key)
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{
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__m128i temp1, temp2, temp3;
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__m128i *Key_Schedule = (__m128i*)key;
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temp1 = _mm_loadu_si128((__m128i*)userkey);
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temp3 = _mm_loadu_si128((__m128i*)(userkey+16));
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Key_Schedule[0] = temp1; Key_Schedule[1] = temp3;
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temp2 = _mm_aeskeygenassist_si128 (temp3,0x01);
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KEY_256_ASSIST_1(&temp1, &temp2);
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Key_Schedule[2]=temp1;
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KEY_256_ASSIST_2(&temp1, &temp3);
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Key_Schedule[3]=temp3;
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temp2 = _mm_aeskeygenassist_si128 (temp3,0x02);
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KEY_256_ASSIST_1(&temp1, &temp2);
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Key_Schedule[4]=temp1;
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KEY_256_ASSIST_2(&temp1, &temp3);
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Key_Schedule[5]=temp3;
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temp2 = _mm_aeskeygenassist_si128 (temp3,0x04);
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KEY_256_ASSIST_1(&temp1, &temp2);
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Key_Schedule[6]=temp1;
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KEY_256_ASSIST_2(&temp1, &temp3);
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Key_Schedule[7]=temp3;
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temp2 = _mm_aeskeygenassist_si128 (temp3,0x08);
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KEY_256_ASSIST_1(&temp1, &temp2);
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Key_Schedule[8]=temp1;
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KEY_256_ASSIST_2(&temp1, &temp3);
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Key_Schedule[9]=temp3;
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temp2 = _mm_aeskeygenassist_si128 (temp3,0x10);
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KEY_256_ASSIST_1(&temp1, &temp2);
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Key_Schedule[10]=temp1;
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KEY_256_ASSIST_2(&temp1, &temp3);
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Key_Schedule[11]=temp3;
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temp2 = _mm_aeskeygenassist_si128 (temp3,0x20);
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KEY_256_ASSIST_1(&temp1, &temp2);
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Key_Schedule[12]=temp1;
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KEY_256_ASSIST_2(&temp1, &temp3);
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Key_Schedule[13]=temp3;
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temp2 = _mm_aeskeygenassist_si128 (temp3,0x40);
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KEY_256_ASSIST_1(&temp1, &temp2);
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Key_Schedule[14]=temp1;
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}
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}
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#endif // AESNIKEYEXP_H
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