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rijndael.cpp
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// rijndael.cpp - modified by Chris Morgan <[email protected]>
// and Wei Dai from Paulo Baretto's Rijndael implementation
// The original code and all modifications are in the public domain.
// use "cl /EP /P /DCRYPTOPP_GENERATE_X64_MASM rijndael.cpp" to generate MASM code
/*
July 2010: Added support for AES-NI instructions via compiler intrinsics.
*/
/*
Feb 2009: The x86/x64 assembly code was rewritten in by Wei Dai to do counter mode
caching, which was invented by Hongjun Wu and popularized by Daniel J. Bernstein
and Peter Schwabe in their paper "New AES software speed records". The round
function was also modified to include a trick similar to one in Brian Gladman's
x86 assembly code, doing an 8-bit register move to minimize the number of
register spills. Also switched to compressed tables and copying round keys to
the stack.
The C++ implementation now uses compressed tables if
CRYPTOPP_ALLOW_UNALIGNED_DATA_ACCESS is defined.
*/
/*
July 2006: Defense against timing attacks was added in by Wei Dai.
The code now uses smaller tables in the first and last rounds,
and preloads them into L1 cache before usage (by loading at least
one element in each cache line).
We try to delay subsequent accesses to each table (used in the first
and last rounds) until all of the table has been preloaded. Hopefully
the compiler isn't smart enough to optimize that code away.
After preloading the table, we also try not to access any memory location
other than the table and the stack, in order to prevent table entries from
being unloaded from L1 cache, until that round is finished.
(Some popular CPUs have 2-way associative caches.)
*/
// This is the original introductory comment:
/**
* version 3.0 (December 2000)
*
* Optimised ANSI C code for the Rijndael cipher (now AES)
*
* author Vincent Rijmen <[email protected]>
* author Antoon Bosselaers <[email protected]>
* author Paulo Barreto <[email protected]>
*
* This code is hereby placed in the public domain.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHORS ''AS IS'' AND ANY EXPRESS
* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "pch.h"
#include "config.h"
#ifndef CRYPTOPP_IMPORTS
#ifndef CRYPTOPP_GENERATE_X64_MASM
#include "rijndael.h"
#include "misc.h"
#include "cpu.h"
NAMESPACE_BEGIN(CryptoPP)
// Hack for http://github.com/weidai11/cryptopp/issues/42 and http://github.com/weidai11/cryptopp/issues/132
#if (CRYPTOPP_BOOL_SSE2_ASM_AVAILABLE || defined(CRYPTOPP_X64_MASM_AVAILABLE)) && !defined(CRYPTOPP_ALLOW_UNALIGNED_DATA_ACCESS)
# define CRYPTOPP_ALLOW_RIJNDAEL_UNALIGNED_DATA_ACCESS 1
#endif
// Hack for SunCC, http://github.com/weidai11/cryptopp/issues/224
#if (__SUNPRO_CC >= 0x5130)
# define MAYBE_CONST
#else
# define MAYBE_CONST const
#endif
#if defined(CRYPTOPP_ALLOW_UNALIGNED_DATA_ACCESS) || defined(CRYPTOPP_ALLOW_RIJNDAEL_UNALIGNED_DATA_ACCESS)
# if (CRYPTOPP_BOOL_SSE2_ASM_AVAILABLE || defined(CRYPTOPP_X64_MASM_AVAILABLE)) && !defined(CRYPTOPP_DISABLE_RIJNDAEL_ASM)
namespace rdtable {CRYPTOPP_ALIGN_DATA(16) word64 Te[256+2];}
using namespace rdtable;
# else
static word64 Te[256];
# endif
static word64 Td[256];
#else // Not CRYPTOPP_ALLOW_UNALIGNED_DATA_ACCESS
# if defined(CRYPTOPP_X64_MASM_AVAILABLE)
// Unused; avoids linker error on Microsoft X64 non-AESNI platforms
namespace rdtable {CRYPTOPP_ALIGN_DATA(16) word64 Te[256+2];}
# endif
CRYPTOPP_ALIGN_DATA(16) static word32 Te[256*4];
CRYPTOPP_ALIGN_DATA(16) static word32 Td[256*4];
#endif // CRYPTOPP_ALLOW_UNALIGNED_DATA_ACCESS
static volatile bool s_TeFilled = false, s_TdFilled = false;
// ************************* Portable Code ************************************
#define QUARTER_ROUND(L, T, t, a, b, c, d) \
a ^= L(T, 3, byte(t)); t >>= 8;\
b ^= L(T, 2, byte(t)); t >>= 8;\
c ^= L(T, 1, byte(t)); t >>= 8;\
d ^= L(T, 0, t);
#define QUARTER_ROUND_LE(t, a, b, c, d) \
tempBlock[a] = ((byte *)(Te+byte(t)))[1]; t >>= 8;\
tempBlock[b] = ((byte *)(Te+byte(t)))[1]; t >>= 8;\
tempBlock[c] = ((byte *)(Te+byte(t)))[1]; t >>= 8;\
tempBlock[d] = ((byte *)(Te+t))[1];
#if defined(CRYPTOPP_ALLOW_UNALIGNED_DATA_ACCESS) || defined(CRYPTOPP_ALLOW_RIJNDAEL_UNALIGNED_DATA_ACCESS)
#define QUARTER_ROUND_LD(t, a, b, c, d) \
tempBlock[a] = ((byte *)(Td+byte(t)))[GetNativeByteOrder()*7]; t >>= 8;\
tempBlock[b] = ((byte *)(Td+byte(t)))[GetNativeByteOrder()*7]; t >>= 8;\
tempBlock[c] = ((byte *)(Td+byte(t)))[GetNativeByteOrder()*7]; t >>= 8;\
tempBlock[d] = ((byte *)(Td+t))[GetNativeByteOrder()*7];
#else
#define QUARTER_ROUND_LD(t, a, b, c, d) \
tempBlock[a] = Sd[byte(t)]; t >>= 8;\
tempBlock[b] = Sd[byte(t)]; t >>= 8;\
tempBlock[c] = Sd[byte(t)]; t >>= 8;\
tempBlock[d] = Sd[t];
#endif
#define QUARTER_ROUND_E(t, a, b, c, d) QUARTER_ROUND(TL_M, Te, t, a, b, c, d)
#define QUARTER_ROUND_D(t, a, b, c, d) QUARTER_ROUND(TL_M, Td, t, a, b, c, d)
#ifdef IS_LITTLE_ENDIAN
#define QUARTER_ROUND_FE(t, a, b, c, d) QUARTER_ROUND(TL_F, Te, t, d, c, b, a)
#define QUARTER_ROUND_FD(t, a, b, c, d) QUARTER_ROUND(TL_F, Td, t, d, c, b, a)
#if defined(CRYPTOPP_ALLOW_UNALIGNED_DATA_ACCESS) || defined(CRYPTOPP_ALLOW_RIJNDAEL_UNALIGNED_DATA_ACCESS)
#define TL_F(T, i, x) (*(word32 *)(void *)((byte *)T + x*8 + (6-i)%4+1))
#define TL_M(T, i, x) (*(word32 *)(void *)((byte *)T + x*8 + (i+3)%4+1))
#else
#define TL_F(T, i, x) rotrFixed(T[x], (3-i)*8)
#define TL_M(T, i, x) T[i*256 + x]
#endif
#else
#define QUARTER_ROUND_FE(t, a, b, c, d) QUARTER_ROUND(TL_F, Te, t, a, b, c, d)
#define QUARTER_ROUND_FD(t, a, b, c, d) QUARTER_ROUND(TL_F, Td, t, a, b, c, d)
#if defined(CRYPTOPP_ALLOW_UNALIGNED_DATA_ACCESS) || defined(CRYPTOPP_ALLOW_RIJNDAEL_UNALIGNED_DATA_ACCESS)
#define TL_F(T, i, x) (*(word32 *)(void *)((byte *)T + x*8 + (4-i)%4))
#define TL_M TL_F
#else
#define TL_F(T, i, x) rotrFixed(T[x], i*8)
#define TL_M(T, i, x) T[i*256 + x]
#endif
#endif
#define f2(x) ((x<<1)^(((x>>7)&1)*0x11b))
#define f4(x) ((x<<2)^(((x>>6)&1)*0x11b)^(((x>>6)&2)*0x11b))
#define f8(x) ((x<<3)^(((x>>5)&1)*0x11b)^(((x>>5)&2)*0x11b)^(((x>>5)&4)*0x11b))
#define f3(x) (f2(x) ^ x)
#define f9(x) (f8(x) ^ x)
#define fb(x) (f8(x) ^ f2(x) ^ x)
#define fd(x) (f8(x) ^ f4(x) ^ x)
#define fe(x) (f8(x) ^ f4(x) ^ f2(x))
void Rijndael::Base::FillEncTable()
{
for (int i=0; i<256; i++)
{
byte x = Se[i];
#if defined(CRYPTOPP_ALLOW_UNALIGNED_DATA_ACCESS) || defined(CRYPTOPP_ALLOW_RIJNDAEL_UNALIGNED_DATA_ACCESS)
word32 y = word32(x)<<8 | word32(x)<<16 | word32(f2(x))<<24;
Te[i] = word64(y | f3(x))<<32 | y;
#else
word32 y = f3(x) | word32(x)<<8 | word32(x)<<16 | word32(f2(x))<<24;
for (int j=0; j<4; j++)
{
Te[i+j*256] = y;
y = rotrFixed(y, 8);
}
#endif
}
#if (CRYPTOPP_BOOL_SSE2_ASM_AVAILABLE || defined(CRYPTOPP_X64_MASM_AVAILABLE)) && !defined(CRYPTOPP_DISABLE_RIJNDAEL_ASM)
Te[256] = Te[257] = 0;
#endif
s_TeFilled = true;
}
void Rijndael::Base::FillDecTable()
{
for (int i=0; i<256; i++)
{
byte x = Sd[i];
#if defined(CRYPTOPP_ALLOW_UNALIGNED_DATA_ACCESS) || defined(CRYPTOPP_ALLOW_RIJNDAEL_UNALIGNED_DATA_ACCESS)
word32 y = word32(fd(x))<<8 | word32(f9(x))<<16 | word32(fe(x))<<24;
Td[i] = word64(y | fb(x))<<32 | y | x;
#else
word32 y = fb(x) | word32(fd(x))<<8 | word32(f9(x))<<16 | word32(fe(x))<<24;;
for (int j=0; j<4; j++)
{
Td[i+j*256] = y;
y = rotrFixed(y, 8);
}
#endif
}
s_TdFilled = true;
}
void Rijndael::Base::UncheckedSetKey(const byte *userKey, unsigned int keylen, const NameValuePairs &)
{
AssertValidKeyLength(keylen);
m_rounds = keylen/4 + 6;
m_key.New(4*(m_rounds+1));
word32 *rk = m_key;
#if (CRYPTOPP_BOOL_AESNI_INTRINSICS_AVAILABLE && CRYPTOPP_BOOL_SSE4_INTRINSICS_AVAILABLE && (!defined(_MSC_VER) || _MSC_VER >= 1600 || CRYPTOPP_BOOL_X86 || CRYPTOPP_BOOL_X32))
// MSVC 2008 SP1 generates bad code for _mm_extract_epi32() when compiling for X64
if (HasAESNI() && HasSSE4())
{
static const word32 rcLE[] = {
0x01, 0x02, 0x04, 0x08,
0x10, 0x20, 0x40, 0x80,
0x1B, 0x36, /* for 128-bit blocks, Rijndael never uses more than 10 rcon values */
};
// Coverity finding, appears to be false positive. Assert the condition.
const word32 *ro = rcLE, *rc = rcLE;
CRYPTOPP_UNUSED(ro);
__m128i temp = _mm_loadu_si128((__m128i *)(void *)(userKey+keylen-16));
memcpy(rk, userKey, keylen);
while (true)
{
// Coverity finding, appears to be false positive. Assert the condition.
CRYPTOPP_ASSERT(rc < ro + COUNTOF(rcLE));
rk[keylen/4] = rk[0] ^ _mm_extract_epi32(_mm_aeskeygenassist_si128(temp, 0), 3) ^ *(rc++);
rk[keylen/4+1] = rk[1] ^ rk[keylen/4];
rk[keylen/4+2] = rk[2] ^ rk[keylen/4+1];
rk[keylen/4+3] = rk[3] ^ rk[keylen/4+2];
if (rk + keylen/4 + 4 == m_key.end())
break;
if (keylen == 24)
{
rk[10] = rk[ 4] ^ rk[ 9];
rk[11] = rk[ 5] ^ rk[10];
// Coverity finding, appears to be false positive. Assert the condition.
CRYPTOPP_ASSERT(m_key.size() >= 12);
temp = _mm_insert_epi32(temp, rk[11], 3);
}
else if (keylen == 32)
{
// Coverity finding, appears to be false positive. Assert the condition.
CRYPTOPP_ASSERT(m_key.size() >= 12);
temp = _mm_insert_epi32(temp, rk[11], 3);
rk[12] = rk[ 4] ^ _mm_extract_epi32(_mm_aeskeygenassist_si128(temp, 0), 2);
rk[13] = rk[ 5] ^ rk[12];
rk[14] = rk[ 6] ^ rk[13];
rk[15] = rk[ 7] ^ rk[14];
// Coverity finding, appears to be false positive. Assert the condition.
CRYPTOPP_ASSERT(m_key.size() >= 16);
temp = _mm_insert_epi32(temp, rk[15], 3);
}
else
{
// Coverity finding, appears to be false positive. Assert the condition.
CRYPTOPP_ASSERT(m_key.size() >= 8);
temp = _mm_insert_epi32(temp, rk[7], 3);
}
rk += keylen/4;
}
if (!IsForwardTransformation())
{
rk = m_key;
unsigned int i, j;
#if defined(__SUNPRO_CC) && (__SUNPRO_CC <= 0x5120)
// __m128i is an unsigned long long[2], and support for swapping it was not added until C++11.
// SunCC 12.1 - 12.3 fail to consume the swap; while SunCC 12.4 consumes it without -std=c++11.
vec_swap(*(__m128i *)(rk), *(__m128i *)(rk+4*m_rounds));
#else
std::swap(*(__m128i *)(void *)(rk), *(__m128i *)(void *)(rk+4*m_rounds));
#endif
for (i = 4, j = 4*m_rounds-4; i < j; i += 4, j -= 4)
{
temp = _mm_aesimc_si128(*(__m128i *)(void *)(rk+i));
*(__m128i *)(void *)(rk+i) = _mm_aesimc_si128(*(__m128i *)(void *)(rk+j));
*(__m128i *)(void *)(rk+j) = temp;
}
*(__m128i *)(void *)(rk+i) = _mm_aesimc_si128(*(__m128i *)(void *)(rk+i));
}
return;
}
#endif
GetUserKey(BIG_ENDIAN_ORDER, rk, keylen/4, userKey, keylen);
const word32 *rc = rcon;
word32 temp;
while (true)
{
temp = rk[keylen/4-1];
word32 x = (word32(Se[GETBYTE(temp, 2)]) << 24) ^ (word32(Se[GETBYTE(temp, 1)]) << 16) ^ (word32(Se[GETBYTE(temp, 0)]) << 8) ^ Se[GETBYTE(temp, 3)];
rk[keylen/4] = rk[0] ^ x ^ *(rc++);
rk[keylen/4+1] = rk[1] ^ rk[keylen/4];
rk[keylen/4+2] = rk[2] ^ rk[keylen/4+1];
rk[keylen/4+3] = rk[3] ^ rk[keylen/4+2];
if (rk + keylen/4 + 4 == m_key.end())
break;
if (keylen == 24)
{
rk[10] = rk[ 4] ^ rk[ 9];
rk[11] = rk[ 5] ^ rk[10];
}
else if (keylen == 32)
{
temp = rk[11];
rk[12] = rk[ 4] ^ (word32(Se[GETBYTE(temp, 3)]) << 24) ^ (word32(Se[GETBYTE(temp, 2)]) << 16) ^ (word32(Se[GETBYTE(temp, 1)]) << 8) ^ Se[GETBYTE(temp, 0)];
rk[13] = rk[ 5] ^ rk[12];
rk[14] = rk[ 6] ^ rk[13];
rk[15] = rk[ 7] ^ rk[14];
}
rk += keylen/4;
}
rk = m_key;
if (IsForwardTransformation())
{
if (!s_TeFilled)
FillEncTable();
ConditionalByteReverse(BIG_ENDIAN_ORDER, rk, rk, 16);
ConditionalByteReverse(BIG_ENDIAN_ORDER, rk + m_rounds*4, rk + m_rounds*4, 16);
}
else
{
if (!s_TdFilled)
FillDecTable();
unsigned int i, j;
#define InverseMixColumn(x) TL_M(Td, 0, Se[GETBYTE(x, 3)]) ^ TL_M(Td, 1, Se[GETBYTE(x, 2)]) ^ TL_M(Td, 2, Se[GETBYTE(x, 1)]) ^ TL_M(Td, 3, Se[GETBYTE(x, 0)])
for (i = 4, j = 4*m_rounds-4; i < j; i += 4, j -= 4)
{
temp = InverseMixColumn(rk[i ]); rk[i ] = InverseMixColumn(rk[j ]); rk[j ] = temp;
temp = InverseMixColumn(rk[i + 1]); rk[i + 1] = InverseMixColumn(rk[j + 1]); rk[j + 1] = temp;
temp = InverseMixColumn(rk[i + 2]); rk[i + 2] = InverseMixColumn(rk[j + 2]); rk[j + 2] = temp;
temp = InverseMixColumn(rk[i + 3]); rk[i + 3] = InverseMixColumn(rk[j + 3]); rk[j + 3] = temp;
}
rk[i+0] = InverseMixColumn(rk[i+0]);
rk[i+1] = InverseMixColumn(rk[i+1]);
rk[i+2] = InverseMixColumn(rk[i+2]);
rk[i+3] = InverseMixColumn(rk[i+3]);
temp = ConditionalByteReverse(BIG_ENDIAN_ORDER, rk[0]); rk[0] = ConditionalByteReverse(BIG_ENDIAN_ORDER, rk[4*m_rounds+0]); rk[4*m_rounds+0] = temp;
temp = ConditionalByteReverse(BIG_ENDIAN_ORDER, rk[1]); rk[1] = ConditionalByteReverse(BIG_ENDIAN_ORDER, rk[4*m_rounds+1]); rk[4*m_rounds+1] = temp;
temp = ConditionalByteReverse(BIG_ENDIAN_ORDER, rk[2]); rk[2] = ConditionalByteReverse(BIG_ENDIAN_ORDER, rk[4*m_rounds+2]); rk[4*m_rounds+2] = temp;
temp = ConditionalByteReverse(BIG_ENDIAN_ORDER, rk[3]); rk[3] = ConditionalByteReverse(BIG_ENDIAN_ORDER, rk[4*m_rounds+3]); rk[4*m_rounds+3] = temp;
}
#if CRYPTOPP_BOOL_AESNI_INTRINSICS_AVAILABLE
if (HasAESNI())
ConditionalByteReverse(BIG_ENDIAN_ORDER, rk+4, rk+4, (m_rounds-1)*16);
#endif
}
void Rijndael::Enc::ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const
{
#if CRYPTOPP_BOOL_SSE2_ASM_AVAILABLE || defined(CRYPTOPP_X64_MASM_AVAILABLE) || CRYPTOPP_BOOL_AESNI_INTRINSICS_AVAILABLE
#if (CRYPTOPP_BOOL_SSE2_ASM_AVAILABLE || defined(CRYPTOPP_X64_MASM_AVAILABLE)) && !defined(CRYPTOPP_DISABLE_RIJNDAEL_ASM)
if (HasSSE2())
#else
if (HasAESNI())
#endif
{
return (void)Rijndael::Enc::AdvancedProcessBlocks(inBlock, xorBlock, outBlock, 16, 0);
}
#endif
typedef BlockGetAndPut<word32, NativeByteOrder> Block;
word32 s0, s1, s2, s3, t0, t1, t2, t3;
Block::Get(inBlock)(s0)(s1)(s2)(s3);
const word32 *rk = m_key;
s0 ^= rk[0];
s1 ^= rk[1];
s2 ^= rk[2];
s3 ^= rk[3];
t0 = rk[4];
t1 = rk[5];
t2 = rk[6];
t3 = rk[7];
rk += 8;
// timing attack countermeasure. see comments at top for more details.
// also see http://github.com/weidai11/cryptopp/issues/146
const int cacheLineSize = GetCacheLineSize();
unsigned int i;
volatile word32 _u = 0;
word32 u = _u;
#if defined(CRYPTOPP_ALLOW_UNALIGNED_DATA_ACCESS) || defined(CRYPTOPP_ALLOW_RIJNDAEL_UNALIGNED_DATA_ACCESS)
for (i=0; i<2048; i+=cacheLineSize)
#else
for (i=0; i<1024; i+=cacheLineSize)
#endif
u &= *(const word32 *)(const void *)(((const byte *)Te)+i);
u &= Te[255];
s0 |= u; s1 |= u; s2 |= u; s3 |= u;
QUARTER_ROUND_FE(s3, t0, t1, t2, t3)
QUARTER_ROUND_FE(s2, t3, t0, t1, t2)
QUARTER_ROUND_FE(s1, t2, t3, t0, t1)
QUARTER_ROUND_FE(s0, t1, t2, t3, t0)
// Nr - 2 full rounds:
unsigned int r = m_rounds/2 - 1;
do
{
s0 = rk[0]; s1 = rk[1]; s2 = rk[2]; s3 = rk[3];
QUARTER_ROUND_E(t3, s0, s1, s2, s3)
QUARTER_ROUND_E(t2, s3, s0, s1, s2)
QUARTER_ROUND_E(t1, s2, s3, s0, s1)
QUARTER_ROUND_E(t0, s1, s2, s3, s0)
t0 = rk[4]; t1 = rk[5]; t2 = rk[6]; t3 = rk[7];
QUARTER_ROUND_E(s3, t0, t1, t2, t3)
QUARTER_ROUND_E(s2, t3, t0, t1, t2)
QUARTER_ROUND_E(s1, t2, t3, t0, t1)
QUARTER_ROUND_E(s0, t1, t2, t3, t0)
rk += 8;
} while (--r);
word32 tbw[4];
byte *const tempBlock = (byte *)tbw;
QUARTER_ROUND_LE(t2, 15, 2, 5, 8)
QUARTER_ROUND_LE(t1, 11, 14, 1, 4)
QUARTER_ROUND_LE(t0, 7, 10, 13, 0)
QUARTER_ROUND_LE(t3, 3, 6, 9, 12)
Block::Put(xorBlock, outBlock)(tbw[0]^rk[0])(tbw[1]^rk[1])(tbw[2]^rk[2])(tbw[3]^rk[3]);
}
void Rijndael::Dec::ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const
{
#if CRYPTOPP_BOOL_AESNI_INTRINSICS_AVAILABLE
if (HasAESNI())
{
Rijndael::Dec::AdvancedProcessBlocks(inBlock, xorBlock, outBlock, 16, 0);
return;
}
#endif
typedef BlockGetAndPut<word32, NativeByteOrder> Block;
word32 s0, s1, s2, s3, t0, t1, t2, t3;
Block::Get(inBlock)(s0)(s1)(s2)(s3);
const word32 *rk = m_key;
s0 ^= rk[0];
s1 ^= rk[1];
s2 ^= rk[2];
s3 ^= rk[3];
t0 = rk[4];
t1 = rk[5];
t2 = rk[6];
t3 = rk[7];
rk += 8;
// timing attack countermeasure. see comments at top for more details.
// also see http://github.com/weidai11/cryptopp/issues/146
const int cacheLineSize = GetCacheLineSize();
unsigned int i;
volatile word32 _u = 0;
word32 u = _u;
#if defined(CRYPTOPP_ALLOW_UNALIGNED_DATA_ACCESS) || defined(CRYPTOPP_ALLOW_RIJNDAEL_UNALIGNED_DATA_ACCESS)
for (i=0; i<2048; i+=cacheLineSize)
#else
for (i=0; i<1024; i+=cacheLineSize)
#endif
u &= *(const word32 *)(const void *)(((const byte *)Td)+i);
u &= Td[255];
s0 |= u; s1 |= u; s2 |= u; s3 |= u;
QUARTER_ROUND_FD(s3, t2, t1, t0, t3)
QUARTER_ROUND_FD(s2, t1, t0, t3, t2)
QUARTER_ROUND_FD(s1, t0, t3, t2, t1)
QUARTER_ROUND_FD(s0, t3, t2, t1, t0)
// Nr - 2 full rounds:
unsigned int r = m_rounds/2 - 1;
do
{
s0 = rk[0]; s1 = rk[1]; s2 = rk[2]; s3 = rk[3];
QUARTER_ROUND_D(t3, s2, s1, s0, s3)
QUARTER_ROUND_D(t2, s1, s0, s3, s2)
QUARTER_ROUND_D(t1, s0, s3, s2, s1)
QUARTER_ROUND_D(t0, s3, s2, s1, s0)
t0 = rk[4]; t1 = rk[5]; t2 = rk[6]; t3 = rk[7];
QUARTER_ROUND_D(s3, t2, t1, t0, t3)
QUARTER_ROUND_D(s2, t1, t0, t3, t2)
QUARTER_ROUND_D(s1, t0, t3, t2, t1)
QUARTER_ROUND_D(s0, t3, t2, t1, t0)
rk += 8;
} while (--r);
#if !(defined(CRYPTOPP_ALLOW_UNALIGNED_DATA_ACCESS) || defined(CRYPTOPP_ALLOW_RIJNDAEL_UNALIGNED_DATA_ACCESS))
// timing attack countermeasure. see comments at top for more details
// If CRYPTOPP_ALLOW_UNALIGNED_DATA_ACCESS is defined,
// QUARTER_ROUND_LD will use Td, which is already preloaded.
u = _u;
for (i=0; i<256; i+=cacheLineSize)
u &= *(const word32 *)(const void *)(Sd+i);
u &= *(const word32 *)(const void *)(Sd+252);
t0 |= u; t1 |= u; t2 |= u; t3 |= u;
#endif
word32 tbw[4];
byte *const tempBlock = (byte *)tbw;
QUARTER_ROUND_LD(t2, 7, 2, 13, 8)
QUARTER_ROUND_LD(t1, 3, 14, 9, 4)
QUARTER_ROUND_LD(t0, 15, 10, 5, 0)
QUARTER_ROUND_LD(t3, 11, 6, 1, 12)
Block::Put(xorBlock, outBlock)(tbw[0]^rk[0])(tbw[1]^rk[1])(tbw[2]^rk[2])(tbw[3]^rk[3]);
}
// ************************* Assembly Code ************************************
#if CRYPTOPP_MSC_VERSION
# pragma warning(disable: 4731) // frame pointer register 'ebp' modified by inline assembly code
#endif
#endif // #ifndef CRYPTOPP_GENERATE_X64_MASM
#if CRYPTOPP_BOOL_SSE2_ASM_AVAILABLE && !defined(CRYPTOPP_DISABLE_RIJNDAEL_ASM)
CRYPTOPP_NAKED void CRYPTOPP_FASTCALL Rijndael_Enc_AdvancedProcessBlocks(void *locals, const word32 *k)
{
CRYPTOPP_UNUSED(locals); CRYPTOPP_UNUSED(k);
#if CRYPTOPP_BOOL_X86 || CRYPTOPP_BOOL_X32
#define L_REG esp
#define L_INDEX(i) (L_REG+768+i)
#define L_INXORBLOCKS L_INBLOCKS+4
#define L_OUTXORBLOCKS L_INBLOCKS+8
#define L_OUTBLOCKS L_INBLOCKS+12
#define L_INCREMENTS L_INDEX(16*15)
#define L_SP L_INDEX(16*16)
#define L_LENGTH L_INDEX(16*16+4)
#define L_KEYS_BEGIN L_INDEX(16*16+8)
#define MOVD movd
#define MM(i) mm##i
#define MXOR(a,b,c) \
AS2( movzx esi, b)\
AS2( movd mm7, DWORD PTR [AS_REG_7+8*WORD_REG(si)+MAP0TO4(c)])\
AS2( pxor MM(a), mm7)\
#define MMOV(a,b,c) \
AS2( movzx esi, b)\
AS2( movd MM(a), DWORD PTR [AS_REG_7+8*WORD_REG(si)+MAP0TO4(c)])\
#else
#define L_REG r8
#define L_INDEX(i) (L_REG+i)
#define L_INXORBLOCKS L_INBLOCKS+8
#define L_OUTXORBLOCKS L_INBLOCKS+16
#define L_OUTBLOCKS L_INBLOCKS+24
#define L_INCREMENTS L_INDEX(16*16)
#define L_LENGTH L_INDEX(16*18+8)
#define L_KEYS_BEGIN L_INDEX(16*19)
#define MOVD mov
#define MM_0 r9d
#define MM_1 r12d
#ifdef __GNUC__
#define MM_2 r11d
#else
#define MM_2 r10d
#endif
#define MM(i) MM_##i
#define MXOR(a,b,c) \
AS2( movzx esi, b)\
AS2( xor MM(a), DWORD PTR [AS_REG_7+8*WORD_REG(si)+MAP0TO4(c)])\
#define MMOV(a,b,c) \
AS2( movzx esi, b)\
AS2( mov MM(a), DWORD PTR [AS_REG_7+8*WORD_REG(si)+MAP0TO4(c)])\
#endif
#define L_SUBKEYS L_INDEX(0)
#define L_SAVED_X L_SUBKEYS
#define L_KEY12 L_INDEX(16*12)
#define L_LASTROUND L_INDEX(16*13)
#define L_INBLOCKS L_INDEX(16*14)
#define MAP0TO4(i) (ASM_MOD(i+3,4)+1)
#define XOR(a,b,c) \
AS2( movzx esi, b)\
AS2( xor a, DWORD PTR [AS_REG_7+8*WORD_REG(si)+MAP0TO4(c)])\
#define MOV(a,b,c) \
AS2( movzx esi, b)\
AS2( mov a, DWORD PTR [AS_REG_7+8*WORD_REG(si)+MAP0TO4(c)])\
#ifdef CRYPTOPP_GENERATE_X64_MASM
ALIGN 8
Rijndael_Enc_AdvancedProcessBlocks PROC FRAME
rex_push_reg rsi
push_reg rdi
push_reg rbx
push_reg r12
.endprolog
mov L_REG, rcx
mov AS_REG_7, ?Te@rdtable@CryptoPP@@3PA_KA
mov edi, DWORD PTR [?g_cacheLineSize@CryptoPP@@3IA]
#elif defined(__GNUC__)
__asm__ __volatile__
(
INTEL_NOPREFIX
#if CRYPTOPP_BOOL_X64
AS2( mov L_REG, rcx)
#endif
AS_PUSH_IF86(bx)
AS_PUSH_IF86(bp)
AS2( mov AS_REG_7, WORD_REG(si))
#else
AS_PUSH_IF86(si)
AS_PUSH_IF86(di)
AS_PUSH_IF86(bx)
AS_PUSH_IF86(bp)
AS2( lea AS_REG_7, [Te])
AS2( mov edi, [g_cacheLineSize])
#endif
#if CRYPTOPP_BOOL_X86 || CRYPTOPP_BOOL_X32
AS2( mov [ecx+16*12+16*4], esp) // save esp to L_SP
AS2( lea esp, [ecx-768])
#endif
// copy subkeys to stack
AS2( mov WORD_REG(si), [L_KEYS_BEGIN])
AS2( mov WORD_REG(ax), 16)
AS2( and WORD_REG(ax), WORD_REG(si))
AS2( movdqa xmm3, XMMWORD_PTR [WORD_REG(dx)+16+WORD_REG(ax)]) // subkey 1 (non-counter) or 2 (counter)
AS2( movdqa [L_KEY12], xmm3)
AS2( lea WORD_REG(ax), [WORD_REG(dx)+WORD_REG(ax)+2*16])
AS2( sub WORD_REG(ax), WORD_REG(si))
ASL(0)
AS2( movdqa xmm0, [WORD_REG(ax)+WORD_REG(si)])
AS2( movdqa XMMWORD_PTR [L_SUBKEYS+WORD_REG(si)], xmm0)
AS2( add WORD_REG(si), 16)
AS2( cmp WORD_REG(si), 16*12)
ATT_NOPREFIX
ASJ( jl, 0, b)
INTEL_NOPREFIX
// read subkeys 0, 1 and last
AS2( movdqa xmm4, [WORD_REG(ax)+WORD_REG(si)]) // last subkey
AS2( movdqa xmm1, [WORD_REG(dx)]) // subkey 0
AS2( MOVD MM(1), [WORD_REG(dx)+4*4]) // 0,1,2,3
AS2( mov ebx, [WORD_REG(dx)+5*4]) // 4,5,6,7
AS2( mov ecx, [WORD_REG(dx)+6*4]) // 8,9,10,11
AS2( mov edx, [WORD_REG(dx)+7*4]) // 12,13,14,15
// load table into cache
AS2( xor WORD_REG(ax), WORD_REG(ax))
ASL(9)
AS2( mov esi, [AS_REG_7+WORD_REG(ax)])
AS2( add WORD_REG(ax), WORD_REG(di))
AS2( mov esi, [AS_REG_7+WORD_REG(ax)])
AS2( add WORD_REG(ax), WORD_REG(di))
AS2( mov esi, [AS_REG_7+WORD_REG(ax)])
AS2( add WORD_REG(ax), WORD_REG(di))
AS2( mov esi, [AS_REG_7+WORD_REG(ax)])
AS2( add WORD_REG(ax), WORD_REG(di))
AS2( cmp WORD_REG(ax), 2048)
ATT_NOPREFIX
ASJ( jl, 9, b)
INTEL_NOPREFIX
AS1( lfence)
AS2( test DWORD PTR [L_LENGTH], 1)
ATT_NOPREFIX
ASJ( jz, 8, f)
INTEL_NOPREFIX
// counter mode one-time setup
AS2( mov WORD_REG(si), [L_INBLOCKS])
AS2( movdqu xmm2, [WORD_REG(si)]) // counter
AS2( pxor xmm2, xmm1)
AS2( psrldq xmm1, 14)
AS2( movd eax, xmm1)
AS2( mov al, BYTE PTR [WORD_REG(si)+15])
AS2( MOVD MM(2), eax)
#if CRYPTOPP_BOOL_X86 || CRYPTOPP_BOOL_X32
AS2( mov eax, 1)
AS2( movd mm3, eax)
#endif
// partial first round, in: xmm2(15,14,13,12;11,10,9,8;7,6,5,4;3,2,1,0), out: mm1, ebx, ecx, edx
AS2( movd eax, xmm2)
AS2( psrldq xmm2, 4)
AS2( movd edi, xmm2)
AS2( psrldq xmm2, 4)
MXOR( 1, al, 0) // 0
XOR( edx, ah, 1) // 1
AS2( shr eax, 16)
XOR( ecx, al, 2) // 2
XOR( ebx, ah, 3) // 3
AS2( mov eax, edi)
AS2( movd edi, xmm2)
AS2( psrldq xmm2, 4)
XOR( ebx, al, 0) // 4
MXOR( 1, ah, 1) // 5
AS2( shr eax, 16)
XOR( edx, al, 2) // 6
XOR( ecx, ah, 3) // 7
AS2( mov eax, edi)
AS2( movd edi, xmm2)
XOR( ecx, al, 0) // 8
XOR( ebx, ah, 1) // 9
AS2( shr eax, 16)
MXOR( 1, al, 2) // 10
XOR( edx, ah, 3) // 11
AS2( mov eax, edi)
XOR( edx, al, 0) // 12
XOR( ecx, ah, 1) // 13
AS2( shr eax, 16)
XOR( ebx, al, 2) // 14
AS2( psrldq xmm2, 3)
// partial second round, in: ebx(4,5,6,7), ecx(8,9,10,11), edx(12,13,14,15), out: eax, ebx, edi, mm0
AS2( mov eax, [L_KEY12+0*4])
AS2( mov edi, [L_KEY12+2*4])
AS2( MOVD MM(0), [L_KEY12+3*4])
MXOR( 0, cl, 3) /* 11 */
XOR( edi, bl, 3) /* 7 */
MXOR( 0, bh, 2) /* 6 */
AS2( shr ebx, 16) /* 4,5 */
XOR( eax, bl, 1) /* 5 */
MOV( ebx, bh, 0) /* 4 */
AS2( xor ebx, [L_KEY12+1*4])
XOR( eax, ch, 2) /* 10 */
AS2( shr ecx, 16) /* 8,9 */
XOR( eax, dl, 3) /* 15 */
XOR( ebx, dh, 2) /* 14 */
AS2( shr edx, 16) /* 12,13 */
XOR( edi, ch, 0) /* 8 */
XOR( ebx, cl, 1) /* 9 */
XOR( edi, dl, 1) /* 13 */
MXOR( 0, dh, 0) /* 12 */
AS2( movd ecx, xmm2)
AS2( MOVD edx, MM(1))
AS2( MOVD [L_SAVED_X+3*4], MM(0))
AS2( mov [L_SAVED_X+0*4], eax)
AS2( mov [L_SAVED_X+1*4], ebx)
AS2( mov [L_SAVED_X+2*4], edi)
ATT_NOPREFIX
ASJ( jmp, 5, f)
INTEL_NOPREFIX
ASL(3)
// non-counter mode per-block setup
AS2( MOVD MM(1), [L_KEY12+0*4]) // 0,1,2,3
AS2( mov ebx, [L_KEY12+1*4]) // 4,5,6,7
AS2( mov ecx, [L_KEY12+2*4]) // 8,9,10,11
AS2( mov edx, [L_KEY12+3*4]) // 12,13,14,15
ASL(8)
AS2( mov WORD_REG(ax), [L_INBLOCKS])
AS2( movdqu xmm2, [WORD_REG(ax)])
AS2( mov WORD_REG(si), [L_INXORBLOCKS])
AS2( movdqu xmm5, [WORD_REG(si)])
AS2( pxor xmm2, xmm1)
AS2( pxor xmm2, xmm5)
// first round, in: xmm2(15,14,13,12;11,10,9,8;7,6,5,4;3,2,1,0), out: eax, ebx, ecx, edx
AS2( movd eax, xmm2)
AS2( psrldq xmm2, 4)
AS2( movd edi, xmm2)
AS2( psrldq xmm2, 4)
MXOR( 1, al, 0) // 0
XOR( edx, ah, 1) // 1
AS2( shr eax, 16)
XOR( ecx, al, 2) // 2
XOR( ebx, ah, 3) // 3
AS2( mov eax, edi)
AS2( movd edi, xmm2)
AS2( psrldq xmm2, 4)
XOR( ebx, al, 0) // 4
MXOR( 1, ah, 1) // 5
AS2( shr eax, 16)
XOR( edx, al, 2) // 6
XOR( ecx, ah, 3) // 7
AS2( mov eax, edi)
AS2( movd edi, xmm2)
XOR( ecx, al, 0) // 8
XOR( ebx, ah, 1) // 9
AS2( shr eax, 16)
MXOR( 1, al, 2) // 10
XOR( edx, ah, 3) // 11
AS2( mov eax, edi)
XOR( edx, al, 0) // 12
XOR( ecx, ah, 1) // 13
AS2( shr eax, 16)
XOR( ebx, al, 2) // 14
MXOR( 1, ah, 3) // 15
AS2( MOVD eax, MM(1))
AS2( add L_REG, [L_KEYS_BEGIN])
AS2( add L_REG, 4*16)
ATT_NOPREFIX
ASJ( jmp, 2, f)
INTEL_NOPREFIX
ASL(1)
// counter-mode per-block setup
AS2( MOVD ecx, MM(2))
AS2( MOVD edx, MM(1))
AS2( mov eax, [L_SAVED_X+0*4])
AS2( mov ebx, [L_SAVED_X+1*4])
AS2( xor cl, ch)
AS2( and WORD_REG(cx), 255)
ASL(5)
#if CRYPTOPP_BOOL_X86 || CRYPTOPP_BOOL_X32
AS2( paddb MM(2), mm3)
#else
AS2( add MM(2), 1)
#endif
// remaining part of second round, in: edx(previous round),esi(keyed counter byte) eax,ebx,[L_SAVED_X+2*4],[L_SAVED_X+3*4], out: eax,ebx,ecx,edx
AS2( xor edx, DWORD PTR [AS_REG_7+WORD_REG(cx)*8+3])
XOR( ebx, dl, 3)
MOV( ecx, dh, 2)
AS2( shr edx, 16)
AS2( xor ecx, [L_SAVED_X+2*4])
XOR( eax, dh, 0)
MOV( edx, dl, 1)
AS2( xor edx, [L_SAVED_X+3*4])
AS2( add L_REG, [L_KEYS_BEGIN])
AS2( add L_REG, 3*16)
ATT_NOPREFIX
ASJ( jmp, 4, f)
INTEL_NOPREFIX
// in: eax(0,1,2,3), ebx(4,5,6,7), ecx(8,9,10,11), edx(12,13,14,15)
// out: eax, ebx, edi, mm0
#define ROUND() \
MXOR( 0, cl, 3) /* 11 */\
AS2( mov cl, al) /* 8,9,10,3 */\
XOR( edi, ah, 2) /* 2 */\
AS2( shr eax, 16) /* 0,1 */\
XOR( edi, bl, 3) /* 7 */\
MXOR( 0, bh, 2) /* 6 */\
AS2( shr ebx, 16) /* 4,5 */\
MXOR( 0, al, 1) /* 1 */\
MOV( eax, ah, 0) /* 0 */\
XOR( eax, bl, 1) /* 5 */\
MOV( ebx, bh, 0) /* 4 */\
XOR( eax, ch, 2) /* 10 */\
XOR( ebx, cl, 3) /* 3 */\
AS2( shr ecx, 16) /* 8,9 */\
XOR( eax, dl, 3) /* 15 */\
XOR( ebx, dh, 2) /* 14 */\
AS2( shr edx, 16) /* 12,13 */\
XOR( edi, ch, 0) /* 8 */\
XOR( ebx, cl, 1) /* 9 */\
XOR( edi, dl, 1) /* 13 */\
MXOR( 0, dh, 0) /* 12 */\
ASL(2) // 2-round loop
AS2( MOVD MM(0), [L_SUBKEYS-4*16+3*4])
AS2( mov edi, [L_SUBKEYS-4*16+2*4])
ROUND()
AS2( mov ecx, edi)
AS2( xor eax, [L_SUBKEYS-4*16+0*4])
AS2( xor ebx, [L_SUBKEYS-4*16+1*4])
AS2( MOVD edx, MM(0))
ASL(4)
AS2( MOVD MM(0), [L_SUBKEYS-4*16+7*4])
AS2( mov edi, [L_SUBKEYS-4*16+6*4])
ROUND()
AS2( mov ecx, edi)
AS2( xor eax, [L_SUBKEYS-4*16+4*4])
AS2( xor ebx, [L_SUBKEYS-4*16+5*4])
AS2( MOVD edx, MM(0))
AS2( add L_REG, 32)
AS2( test L_REG, 255)
ATT_NOPREFIX
ASJ( jnz, 2, b)
INTEL_NOPREFIX
AS2( sub L_REG, 16*16)
#define LAST(a, b, c) \
AS2( movzx esi, a )\
AS2( movzx edi, BYTE PTR [AS_REG_7+WORD_REG(si)*8+1] )\
AS2( movzx esi, b )\
AS2( xor edi, DWORD PTR [AS_REG_7+WORD_REG(si)*8+0] )\
AS2( mov WORD PTR [L_LASTROUND+c], di )\
// last round
LAST(ch, dl, 2)
LAST(dh, al, 6)
AS2( shr edx, 16)
LAST(ah, bl, 10)
AS2( shr eax, 16)
LAST(bh, cl, 14)
AS2( shr ebx, 16)
LAST(dh, al, 12)
AS2( shr ecx, 16)
LAST(ah, bl, 0)
LAST(bh, cl, 4)
LAST(ch, dl, 8)
AS2( mov WORD_REG(ax), [L_OUTXORBLOCKS])
AS2( mov WORD_REG(bx), [L_OUTBLOCKS])
AS2( mov WORD_REG(cx), [L_LENGTH])
AS2( sub WORD_REG(cx), 16)
AS2( movdqu xmm2, [WORD_REG(ax)])
AS2( pxor xmm2, xmm4)
#if CRYPTOPP_BOOL_X86 || CRYPTOPP_BOOL_X32
AS2( movdqa xmm0, [L_INCREMENTS])
AS2( paddd xmm0, [L_INBLOCKS])
AS2( movdqa [L_INBLOCKS], xmm0)
#else
AS2( movdqa xmm0, [L_INCREMENTS+16])
AS2( paddq xmm0, [L_INBLOCKS+16])
AS2( movdqa [L_INBLOCKS+16], xmm0)
#endif
AS2( pxor xmm2, [L_LASTROUND])
AS2( movdqu [WORD_REG(bx)], xmm2)
ATT_NOPREFIX
ASJ( jle, 7, f)
INTEL_NOPREFIX
AS2( mov [L_LENGTH], WORD_REG(cx))
AS2( test WORD_REG(cx), 1)
ATT_NOPREFIX
ASJ( jnz, 1, b)
INTEL_NOPREFIX
#if CRYPTOPP_BOOL_X64
AS2( movdqa xmm0, [L_INCREMENTS])
AS2( paddq xmm0, [L_INBLOCKS])
AS2( movdqa [L_INBLOCKS], xmm0)
#endif
ATT_NOPREFIX
ASJ( jmp, 3, b)
INTEL_NOPREFIX
ASL(7)
// erase keys on stack
AS2( xorps xmm0, xmm0)
AS2( lea WORD_REG(ax), [L_SUBKEYS+7*16])
AS2( movaps [WORD_REG(ax)-7*16], xmm0)
AS2( movaps [WORD_REG(ax)-6*16], xmm0)
AS2( movaps [WORD_REG(ax)-5*16], xmm0)
AS2( movaps [WORD_REG(ax)-4*16], xmm0)
AS2( movaps [WORD_REG(ax)-3*16], xmm0)
AS2( movaps [WORD_REG(ax)-2*16], xmm0)