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429 lines (371 loc) · 10.3 KB
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/* Aes.c -- AES encryption / decryption
2024-03-01 : Igor Pavlov : Public domain */
#include "Precomp.h"
#include "CpuArch.h"
#include "Aes.h"
AES_CODE_FUNC g_AesCbc_Decode;
#ifndef Z7_SFX
AES_CODE_FUNC g_AesCbc_Encode;
AES_CODE_FUNC g_AesCtr_Code;
UInt32 g_Aes_SupportedFunctions_Flags;
#endif
MY_ALIGN(64)
static UInt32 T[256 * 4];
MY_ALIGN(64)
static const Byte Sbox[256] = {
0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5, 0x30, 0x01, 0x67, 0x2b, 0xfe, 0xd7, 0xab, 0x76,
0xca, 0x82, 0xc9, 0x7d, 0xfa, 0x59, 0x47, 0xf0, 0xad, 0xd4, 0xa2, 0xaf, 0x9c, 0xa4, 0x72, 0xc0,
0xb7, 0xfd, 0x93, 0x26, 0x36, 0x3f, 0xf7, 0xcc, 0x34, 0xa5, 0xe5, 0xf1, 0x71, 0xd8, 0x31, 0x15,
0x04, 0xc7, 0x23, 0xc3, 0x18, 0x96, 0x05, 0x9a, 0x07, 0x12, 0x80, 0xe2, 0xeb, 0x27, 0xb2, 0x75,
0x09, 0x83, 0x2c, 0x1a, 0x1b, 0x6e, 0x5a, 0xa0, 0x52, 0x3b, 0xd6, 0xb3, 0x29, 0xe3, 0x2f, 0x84,
0x53, 0xd1, 0x00, 0xed, 0x20, 0xfc, 0xb1, 0x5b, 0x6a, 0xcb, 0xbe, 0x39, 0x4a, 0x4c, 0x58, 0xcf,
0xd0, 0xef, 0xaa, 0xfb, 0x43, 0x4d, 0x33, 0x85, 0x45, 0xf9, 0x02, 0x7f, 0x50, 0x3c, 0x9f, 0xa8,
0x51, 0xa3, 0x40, 0x8f, 0x92, 0x9d, 0x38, 0xf5, 0xbc, 0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3, 0xd2,
0xcd, 0x0c, 0x13, 0xec, 0x5f, 0x97, 0x44, 0x17, 0xc4, 0xa7, 0x7e, 0x3d, 0x64, 0x5d, 0x19, 0x73,
0x60, 0x81, 0x4f, 0xdc, 0x22, 0x2a, 0x90, 0x88, 0x46, 0xee, 0xb8, 0x14, 0xde, 0x5e, 0x0b, 0xdb,
0xe0, 0x32, 0x3a, 0x0a, 0x49, 0x06, 0x24, 0x5c, 0xc2, 0xd3, 0xac, 0x62, 0x91, 0x95, 0xe4, 0x79,
0xe7, 0xc8, 0x37, 0x6d, 0x8d, 0xd5, 0x4e, 0xa9, 0x6c, 0x56, 0xf4, 0xea, 0x65, 0x7a, 0xae, 0x08,
0xba, 0x78, 0x25, 0x2e, 0x1c, 0xa6, 0xb4, 0xc6, 0xe8, 0xdd, 0x74, 0x1f, 0x4b, 0xbd, 0x8b, 0x8a,
0x70, 0x3e, 0xb5, 0x66, 0x48, 0x03, 0xf6, 0x0e, 0x61, 0x35, 0x57, 0xb9, 0x86, 0xc1, 0x1d, 0x9e,
0xe1, 0xf8, 0x98, 0x11, 0x69, 0xd9, 0x8e, 0x94, 0x9b, 0x1e, 0x87, 0xe9, 0xce, 0x55, 0x28, 0xdf,
0x8c, 0xa1, 0x89, 0x0d, 0xbf, 0xe6, 0x42, 0x68, 0x41, 0x99, 0x2d, 0x0f, 0xb0, 0x54, 0xbb, 0x16};
MY_ALIGN(64)
static UInt32 D[256 * 4];
MY_ALIGN(64)
static Byte InvS[256];
#define xtime(x) ((((x) << 1) ^ (((x) & 0x80) != 0 ? 0x1B : 0)) & 0xFF)
#define Ui32(a0, a1, a2, a3) ((UInt32)(a0) | ((UInt32)(a1) << 8) | ((UInt32)(a2) << 16) | ((UInt32)(a3) << 24))
#define gb0(x) ( (x) & 0xFF)
#define gb1(x) (((x) >> ( 8)) & 0xFF)
#define gb2(x) (((x) >> (16)) & 0xFF)
#define gb3(x) (((x) >> (24)))
#define gb(n, x) gb ## n(x)
#define TT(x) (T + (x << 8))
#define DD(x) (D + (x << 8))
// #define Z7_SHOW_AES_STATUS
#ifdef MY_CPU_X86_OR_AMD64
#if defined(__INTEL_COMPILER)
#if (__INTEL_COMPILER >= 1110)
#define USE_HW_AES
#if (__INTEL_COMPILER >= 1900)
#define USE_HW_VAES
#endif
#endif
#elif defined(Z7_CLANG_VERSION) && (Z7_CLANG_VERSION >= 30800) \
|| defined(Z7_GCC_VERSION) && (Z7_GCC_VERSION >= 40400)
#define USE_HW_AES
#if defined(__clang__) && (__clang_major__ >= 8) \
|| defined(__GNUC__) && (__GNUC__ >= 8)
#define USE_HW_VAES
#endif
#elif defined(_MSC_VER)
#define USE_HW_AES
#define USE_HW_VAES
#endif
#elif defined(MY_CPU_ARM_OR_ARM64) && defined(MY_CPU_LE)
#if defined(__ARM_FEATURE_AES) \
|| defined(__ARM_FEATURE_CRYPTO)
#define USE_HW_AES
#else
#if defined(MY_CPU_ARM64) \
|| defined(__ARM_ARCH) && (__ARM_ARCH >= 4) \
|| defined(Z7_MSC_VER_ORIGINAL)
#if defined(__ARM_FP) && \
( defined(Z7_CLANG_VERSION) && (Z7_CLANG_VERSION >= 30800) \
|| defined(__GNUC__) && (__GNUC__ >= 6) \
) \
|| defined(Z7_MSC_VER_ORIGINAL) && (_MSC_VER >= 1910)
#if defined(MY_CPU_ARM64) \
|| !defined(Z7_CLANG_VERSION) \
|| defined(__ARM_NEON) && \
(Z7_CLANG_VERSION < 170000 || \
Z7_CLANG_VERSION > 170001)
#define USE_HW_AES
#endif
#endif
#endif
#endif
#endif
#ifdef USE_HW_AES
// #pragma message("=== Aes.c USE_HW_AES === ")
#ifdef Z7_SHOW_AES_STATUS
#include <stdio.h>
#define PRF(x) x
#else
#define PRF(x)
#endif
#endif
void AesGenTables(void)
{
unsigned i;
for (i = 0; i < 256; i++)
InvS[Sbox[i]] = (Byte)i;
for (i = 0; i < 256; i++)
{
{
const UInt32 a1 = Sbox[i];
const UInt32 a2 = xtime(a1);
const UInt32 a3 = a2 ^ a1;
TT(0)[i] = Ui32(a2, a1, a1, a3);
TT(1)[i] = Ui32(a3, a2, a1, a1);
TT(2)[i] = Ui32(a1, a3, a2, a1);
TT(3)[i] = Ui32(a1, a1, a3, a2);
}
{
const UInt32 a1 = InvS[i];
const UInt32 a2 = xtime(a1);
const UInt32 a4 = xtime(a2);
const UInt32 a8 = xtime(a4);
const UInt32 a9 = a8 ^ a1;
const UInt32 aB = a8 ^ a2 ^ a1;
const UInt32 aD = a8 ^ a4 ^ a1;
const UInt32 aE = a8 ^ a4 ^ a2;
DD(0)[i] = Ui32(aE, a9, aD, aB);
DD(1)[i] = Ui32(aB, aE, a9, aD);
DD(2)[i] = Ui32(aD, aB, aE, a9);
DD(3)[i] = Ui32(a9, aD, aB, aE);
}
}
{
AES_CODE_FUNC d = AesCbc_Decode;
#ifndef Z7_SFX
AES_CODE_FUNC e = AesCbc_Encode;
AES_CODE_FUNC c = AesCtr_Code;
UInt32 flags = 0;
#endif
#ifdef USE_HW_AES
if (CPU_IsSupported_AES())
{
// #pragma message ("AES HW")
PRF(printf("\n===AES HW\n"));
d = AesCbc_Decode_HW;
#ifndef Z7_SFX
e = AesCbc_Encode_HW;
c = AesCtr_Code_HW;
flags = k_Aes_SupportedFunctions_HW;
#endif
#ifdef MY_CPU_X86_OR_AMD64
#ifdef USE_HW_VAES
if (CPU_IsSupported_VAES_AVX2())
{
PRF(printf("\n===vaes avx2\n"));
d = AesCbc_Decode_HW_256;
#ifndef Z7_SFX
c = AesCtr_Code_HW_256;
flags |= k_Aes_SupportedFunctions_HW_256;
#endif
}
#endif
#endif
}
#endif
g_AesCbc_Decode = d;
#ifndef Z7_SFX
g_AesCbc_Encode = e;
g_AesCtr_Code = c;
g_Aes_SupportedFunctions_Flags = flags;
#endif
}
}
#define HT(i, x, s) TT(x)[gb(x, s[(i + x) & 3])]
#define HT4(m, i, s, p) m[i] = \
HT(i, 0, s) ^ \
HT(i, 1, s) ^ \
HT(i, 2, s) ^ \
HT(i, 3, s) ^ w[p + i]
#define HT16(m, s, p) \
HT4(m, 0, s, p); \
HT4(m, 1, s, p); \
HT4(m, 2, s, p); \
HT4(m, 3, s, p); \
#define FT(i, x) Sbox[gb(x, m[(i + x) & 3])]
#define FT4(i) dest[i] = Ui32(FT(i, 0), FT(i, 1), FT(i, 2), FT(i, 3)) ^ w[i];
#define HD(i, x, s) DD(x)[gb(x, s[(i - x) & 3])]
#define HD4(m, i, s, p) m[i] = \
HD(i, 0, s) ^ \
HD(i, 1, s) ^ \
HD(i, 2, s) ^ \
HD(i, 3, s) ^ w[p + i];
#define HD16(m, s, p) \
HD4(m, 0, s, p); \
HD4(m, 1, s, p); \
HD4(m, 2, s, p); \
HD4(m, 3, s, p); \
#define FD(i, x) InvS[gb(x, m[(i - x) & 3])]
#define FD4(i) dest[i] = Ui32(FD(i, 0), FD(i, 1), FD(i, 2), FD(i, 3)) ^ w[i];
void Z7_FASTCALL Aes_SetKey_Enc(UInt32 *w, const Byte *key, unsigned keySize)
{
unsigned i, m;
const UInt32 *wLim;
UInt32 t;
UInt32 rcon = 1;
keySize /= 4;
w[0] = ((UInt32)keySize / 2) + 3;
w += 4;
for (i = 0; i < keySize; i++, key += 4)
w[i] = GetUi32(key);
t = w[(size_t)keySize - 1];
wLim = w + (size_t)keySize * 3 + 28;
m = 0;
do
{
if (m == 0)
{
t = Ui32(Sbox[gb1(t)] ^ rcon, Sbox[gb2(t)], Sbox[gb3(t)], Sbox[gb0(t)]);
rcon <<= 1;
if (rcon & 0x100)
rcon = 0x1b;
m = keySize;
}
else if (m == 4 && keySize > 6)
t = Ui32(Sbox[gb0(t)], Sbox[gb1(t)], Sbox[gb2(t)], Sbox[gb3(t)]);
m--;
t ^= w[0];
w[keySize] = t;
}
while (++w != wLim);
}
void Z7_FASTCALL Aes_SetKey_Dec(UInt32 *w, const Byte *key, unsigned keySize)
{
unsigned i, num;
Aes_SetKey_Enc(w, key, keySize);
num = keySize + 20;
w += 8;
for (i = 0; i < num; i++)
{
UInt32 r = w[i];
w[i] =
DD(0)[Sbox[gb0(r)]] ^
DD(1)[Sbox[gb1(r)]] ^
DD(2)[Sbox[gb2(r)]] ^
DD(3)[Sbox[gb3(r)]];
}
}
/* Aes_Encode and Aes_Decode functions work with little-endian words.
src and dest are pointers to 4 UInt32 words.
src and dest can point to same block */
// Z7_FORCE_INLINE
static void Aes_Encode(const UInt32 *w, UInt32 *dest, const UInt32 *src)
{
UInt32 s[4];
UInt32 m[4];
UInt32 numRounds2 = w[0];
w += 4;
s[0] = src[0] ^ w[0];
s[1] = src[1] ^ w[1];
s[2] = src[2] ^ w[2];
s[3] = src[3] ^ w[3];
w += 4;
for (;;)
{
HT16(m, s, 0)
if (--numRounds2 == 0)
break;
HT16(s, m, 4)
w += 8;
}
w += 4;
FT4(0)
FT4(1)
FT4(2)
FT4(3)
}
Z7_FORCE_INLINE
static void Aes_Decode(const UInt32 *w, UInt32 *dest, const UInt32 *src)
{
UInt32 s[4];
UInt32 m[4];
UInt32 numRounds2 = w[0];
w += 4 + numRounds2 * 8;
s[0] = src[0] ^ w[0];
s[1] = src[1] ^ w[1];
s[2] = src[2] ^ w[2];
s[3] = src[3] ^ w[3];
for (;;)
{
w -= 8;
HD16(m, s, 4)
if (--numRounds2 == 0)
break;
HD16(s, m, 0)
}
FD4(0)
FD4(1)
FD4(2)
FD4(3)
}
void AesCbc_Init(UInt32 *p, const Byte *iv)
{
unsigned i;
for (i = 0; i < 4; i++)
p[i] = GetUi32(iv + i * 4);
}
void Z7_FASTCALL AesCbc_Encode(UInt32 *p, Byte *data, size_t numBlocks)
{
for (; numBlocks != 0; numBlocks--, data += AES_BLOCK_SIZE)
{
p[0] ^= GetUi32(data);
p[1] ^= GetUi32(data + 4);
p[2] ^= GetUi32(data + 8);
p[3] ^= GetUi32(data + 12);
Aes_Encode(p + 4, p, p);
SetUi32(data, p[0])
SetUi32(data + 4, p[1])
SetUi32(data + 8, p[2])
SetUi32(data + 12, p[3])
}
}
void Z7_FASTCALL AesCbc_Decode(UInt32 *p, Byte *data, size_t numBlocks)
{
UInt32 in[4], out[4];
for (; numBlocks != 0; numBlocks--, data += AES_BLOCK_SIZE)
{
in[0] = GetUi32(data);
in[1] = GetUi32(data + 4);
in[2] = GetUi32(data + 8);
in[3] = GetUi32(data + 12);
Aes_Decode(p + 4, out, in);
SetUi32(data, p[0] ^ out[0])
SetUi32(data + 4, p[1] ^ out[1])
SetUi32(data + 8, p[2] ^ out[2])
SetUi32(data + 12, p[3] ^ out[3])
p[0] = in[0];
p[1] = in[1];
p[2] = in[2];
p[3] = in[3];
}
}
void Z7_FASTCALL AesCtr_Code(UInt32 *p, Byte *data, size_t numBlocks)
{
for (; numBlocks != 0; numBlocks--)
{
UInt32 temp[4];
unsigned i;
if (++p[0] == 0)
p[1]++;
Aes_Encode(p + 4, temp, p);
for (i = 0; i < 4; i++, data += 4)
{
const UInt32 t = temp[i];
#ifdef MY_CPU_LE_UNALIGN
*((UInt32 *)(void *)data) ^= t;
#else
data[0] = (Byte)(data[0] ^ (t & 0xFF));
data[1] = (Byte)(data[1] ^ ((t >> 8) & 0xFF));
data[2] = (Byte)(data[2] ^ ((t >> 16) & 0xFF));
data[3] = (Byte)(data[3] ^ ((t >> 24)));
#endif
}
}
}
#undef xtime
#undef Ui32
#undef gb0
#undef gb1
#undef gb2
#undef gb3
#undef gb
#undef TT
#undef DD
#undef USE_HW_AES
#undef PRF