diff options
Diffstat (limited to 'plugins/CryptoPP/crypto/rijndael.cpp')
| -rw-r--r-- | plugins/CryptoPP/crypto/rijndael.cpp | 722 |
1 files changed, 722 insertions, 0 deletions
diff --git a/plugins/CryptoPP/crypto/rijndael.cpp b/plugins/CryptoPP/crypto/rijndael.cpp new file mode 100644 index 0000000000..c1682d8399 --- /dev/null +++ b/plugins/CryptoPP/crypto/rijndael.cpp @@ -0,0 +1,722 @@ +// rijndael.cpp - modified by Chris Morgan <cmorgan@wpi.edu>
+// 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
+
+/*
+Defense against timing attacks was added in July 2006 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 <vincent.rijmen@esat.kuleuven.ac.be>
+ * author Antoon Bosselaers <antoon.bosselaers@esat.kuleuven.ac.be>
+ * author Paulo Barreto <paulo.barreto@terra.com.br>
+ *
+ * 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"
+
+#ifndef CRYPTOPP_IMPORTS
+#ifndef CRYPTOPP_GENERATE_X64_MASM
+
+#include "rijndael.h"
+#include "misc.h"
+#include "cpu.h"
+
+NAMESPACE_BEGIN(CryptoPP)
+
+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 temp, *rk = m_key;
+ const word32 *rc = rcon;
+
+ GetUserKey(BIG_ENDIAN_ORDER, rk, keylen/4, userKey, keylen);
+
+ while (true)
+ {
+ temp = rk[keylen/4-1];
+ rk[keylen/4] = rk[0] ^
+ (word32(Se[GETBYTE(temp, 2)]) << 24) ^
+ (word32(Se[GETBYTE(temp, 1)]) << 16) ^
+ (word32(Se[GETBYTE(temp, 0)]) << 8) ^
+ Se[GETBYTE(temp, 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];
+ }
+ 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;
+ }
+
+ if (!IsForwardTransformation())
+ {
+ unsigned int i, j;
+ rk = m_key;
+
+ /* invert the order of the round keys: */
+ for (i = 0, j = 4*m_rounds; i < j; i += 4, j -= 4) {
+ temp = rk[i ]; rk[i ] = rk[j ]; rk[j ] = temp;
+ temp = rk[i + 1]; rk[i + 1] = rk[j + 1]; rk[j + 1] = temp;
+ temp = rk[i + 2]; rk[i + 2] = rk[j + 2]; rk[j + 2] = temp;
+ temp = rk[i + 3]; rk[i + 3] = rk[j + 3]; rk[j + 3] = temp;
+ }
+ /* apply the inverse MixColumn transform to all round keys but the first and the last: */
+ for (i = 1; i < m_rounds; i++) {
+ rk += 4;
+ rk[0] =
+ Td[0*256+Se[GETBYTE(rk[0], 3)]] ^
+ Td[1*256+Se[GETBYTE(rk[0], 2)]] ^
+ Td[2*256+Se[GETBYTE(rk[0], 1)]] ^
+ Td[3*256+Se[GETBYTE(rk[0], 0)]];
+ rk[1] =
+ Td[0*256+Se[GETBYTE(rk[1], 3)]] ^
+ Td[1*256+Se[GETBYTE(rk[1], 2)]] ^
+ Td[2*256+Se[GETBYTE(rk[1], 1)]] ^
+ Td[3*256+Se[GETBYTE(rk[1], 0)]];
+ rk[2] =
+ Td[0*256+Se[GETBYTE(rk[2], 3)]] ^
+ Td[1*256+Se[GETBYTE(rk[2], 2)]] ^
+ Td[2*256+Se[GETBYTE(rk[2], 1)]] ^
+ Td[3*256+Se[GETBYTE(rk[2], 0)]];
+ rk[3] =
+ Td[0*256+Se[GETBYTE(rk[3], 3)]] ^
+ Td[1*256+Se[GETBYTE(rk[3], 2)]] ^
+ Td[2*256+Se[GETBYTE(rk[3], 1)]] ^
+ Td[3*256+Se[GETBYTE(rk[3], 0)]];
+ }
+ }
+
+ ConditionalByteReverse(BIG_ENDIAN_ORDER, m_key.begin(), m_key.begin(), 16);
+ ConditionalByteReverse(BIG_ENDIAN_ORDER, m_key + m_rounds*4, m_key + m_rounds*4, 16);
+}
+
+#ifdef CRYPTOPP_X64_MASM_AVAILABLE
+extern "C" {
+void Rijndael_Enc_ProcessAndXorBlock(const word32 *table, word32 cacheLineSize, const word32 *k, const word32 *kLoopEnd, const byte *inBlock, const byte *xorBlock, byte *outBlock);
+}
+#endif
+
+#pragma warning(disable: 4731) // frame pointer register 'ebp' modified by inline assembly code
+
+void Rijndael::Enc::ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const
+{
+#endif // #ifdef CRYPTOPP_GENERATE_X64_MASM
+
+#ifdef CRYPTOPP_X64_MASM_AVAILABLE
+ Rijndael_Enc_ProcessAndXorBlock(Te, g_cacheLineSize, m_key, m_key + m_rounds*4, inBlock, xorBlock, outBlock);
+ return;
+#endif
+
+#if defined(CRYPTOPP_X86_ASM_AVAILABLE)
+ #ifdef CRYPTOPP_GENERATE_X64_MASM
+ ALIGN 8
+ Rijndael_Enc_ProcessAndXorBlock PROC FRAME
+ rex_push_reg rbx
+ push_reg rsi
+ push_reg rdi
+ push_reg r12
+ push_reg r13
+ push_reg r14
+ push_reg r15
+ .endprolog
+ mov AS_REG_7, rcx
+ mov rdi, [rsp + 5*8 + 7*8] ; inBlock
+ #else
+ if (HasMMX())
+ {
+ const word32 *k = m_key;
+ const word32 *kLoopEnd = k + m_rounds*4;
+ #endif
+
+ #if CRYPTOPP_BOOL_X64
+ #define K_REG r8
+ #define K_END_REG r9
+ #define SAVE_K
+ #define RESTORE_K
+ #define RESTORE_K_END
+ #define SAVE_0(x) AS2(mov r13d, x)
+ #define SAVE_1(x) AS2(mov r14d, x)
+ #define SAVE_2(x) AS2(mov r15d, x)
+ #define RESTORE_0(x) AS2(mov x, r13d)
+ #define RESTORE_1(x) AS2(mov x, r14d)
+ #define RESTORE_2(x) AS2(mov x, r15d)
+ #else
+ #define K_REG esi
+ #define K_END_REG edi
+ #define SAVE_K AS2(movd mm4, esi)
+ #define RESTORE_K AS2(movd esi, mm4)
+ #define RESTORE_K_END AS2(movd edi, mm5)
+ #define SAVE_0(x) AS2(movd mm0, x)
+ #define SAVE_1(x) AS2(movd mm1, x)
+ #define SAVE_2(x) AS2(movd mm2, x)
+ #define RESTORE_0(x) AS2(movd x, mm0)
+ #define RESTORE_1(x) AS2(movd x, mm1)
+ #define RESTORE_2(x) AS2(movd x, mm2)
+ #endif
+#ifdef __GNUC__
+ word32 t0, t1, t2, t3;
+ __asm__ __volatile__
+ (
+ ".intel_syntax noprefix;"
+ #if CRYPTOPP_BOOL_X64
+ AS2( mov K_REG, rsi)
+ AS2( mov K_END_REG, rcx)
+ #else
+ AS1( push ebx)
+ AS1( push ebp)
+ AS2( movd mm5, ecx)
+ #endif
+ AS2( mov AS_REG_7, WORD_REG(ax))
+#elif CRYPTOPP_BOOL_X86
+ #if _MSC_VER < 1300
+ const word32 *t = Te;
+ AS2( mov eax, t)
+ #endif
+ AS2( mov edx, g_cacheLineSize)
+ AS2( mov WORD_REG(di), inBlock)
+ AS2( mov K_REG, k)
+ AS2( movd mm5, kLoopEnd)
+ #if _MSC_VER < 1300
+ AS1( push ebx)
+ AS1( push ebp)
+ AS2( mov AS_REG_7, eax)
+ #else
+ AS1( push ebp)
+ AS2( lea AS_REG_7, Te)
+ #endif
+#endif
+ AS2( mov eax, [K_REG+0*4]) // s0
+ AS2( xor eax, [WORD_REG(di)+0*4])
+ SAVE_0(eax)
+ AS2( mov ebx, [K_REG+1*4])
+ AS2( xor ebx, [WORD_REG(di)+1*4])
+ SAVE_1(ebx)
+ AS2( and ebx, eax)
+ AS2( mov eax, [K_REG+2*4])
+ AS2( xor eax, [WORD_REG(di)+2*4])
+ SAVE_2(eax)
+ AS2( and ebx, eax)
+ AS2( mov ecx, [K_REG+3*4])
+ AS2( xor ecx, [WORD_REG(di)+3*4])
+ AS2( and ebx, ecx)
+
+ // read Te0 into L1 cache. this code could be simplifed by using lfence, but that is an SSE2 instruction
+ AS2( and ebx, 0)
+ AS2( mov edi, ebx) // make index depend on previous loads to simulate lfence
+ ASL(2)
+ AS2( and ebx, [AS_REG_7+WORD_REG(di)])
+ AS2( add edi, edx)
+ AS2( and ebx, [AS_REG_7+WORD_REG(di)])
+ AS2( add edi, edx)
+ AS2( and ebx, [AS_REG_7+WORD_REG(di)])
+ AS2( add edi, edx)
+ AS2( and ebx, [AS_REG_7+WORD_REG(di)])
+ AS2( add edi, edx)
+ AS2( cmp edi, 1024)
+ ASJ( jl, 2, b)
+ AS2( and ebx, [AS_REG_7+1020])
+#if CRYPTOPP_BOOL_X64
+ AS2( xor r13d, ebx)
+ AS2( xor r14d, ebx)
+ AS2( xor r15d, ebx)
+#else
+ AS2( movd mm6, ebx)
+ AS2( pxor mm2, mm6)
+ AS2( pxor mm1, mm6)
+ AS2( pxor mm0, mm6)
+#endif
+ AS2( xor ecx, ebx)
+
+ AS2( mov edi, [K_REG+4*4]) // t0
+ AS2( mov eax, [K_REG+5*4])
+ AS2( mov ebx, [K_REG+6*4])
+ AS2( mov edx, [K_REG+7*4])
+ AS2( add K_REG, 8*4)
+ SAVE_K
+
+#define QUARTER_ROUND(t, a, b, c, d) \
+ AS2(movzx esi, t##l)\
+ AS2(d, [AS_REG_7+0*1024+4*WORD_REG(si)])\
+ AS2(movzx esi, t##h)\
+ AS2(c, [AS_REG_7+1*1024+4*WORD_REG(si)])\
+ AS2(shr e##t##x, 16)\
+ AS2(movzx esi, t##l)\
+ AS2(b, [AS_REG_7+2*1024+4*WORD_REG(si)])\
+ AS2(movzx esi, t##h)\
+ AS2(a, [AS_REG_7+3*1024+4*WORD_REG(si)])
+
+#define s0 xor edi
+#define s1 xor eax
+#define s2 xor ebx
+#define s3 xor ecx
+#define t0 xor edi
+#define t1 xor eax
+#define t2 xor ebx
+#define t3 xor edx
+
+ QUARTER_ROUND(c, t0, t1, t2, t3)
+ RESTORE_2(ecx)
+ QUARTER_ROUND(c, t3, t0, t1, t2)
+ RESTORE_1(ecx)
+ QUARTER_ROUND(c, t2, t3, t0, t1)
+ RESTORE_0(ecx)
+ QUARTER_ROUND(c, t1, t2, t3, t0)
+ SAVE_2(ebx)
+ SAVE_1(eax)
+ SAVE_0(edi)
+#undef QUARTER_ROUND
+
+ RESTORE_K
+
+ ASL(0)
+ AS2( mov edi, [K_REG+0*4])
+ AS2( mov eax, [K_REG+1*4])
+ AS2( mov ebx, [K_REG+2*4])
+ AS2( mov ecx, [K_REG+3*4])
+
+#define QUARTER_ROUND(t, a, b, c, d) \
+ AS2(movzx esi, t##l)\
+ AS2(a, [AS_REG_7+3*1024+4*WORD_REG(si)])\
+ AS2(movzx esi, t##h)\
+ AS2(b, [AS_REG_7+2*1024+4*WORD_REG(si)])\
+ AS2(shr e##t##x, 16)\
+ AS2(movzx esi, t##l)\
+ AS2(c, [AS_REG_7+1*1024+4*WORD_REG(si)])\
+ AS2(movzx esi, t##h)\
+ AS2(d, [AS_REG_7+0*1024+4*WORD_REG(si)])
+
+ QUARTER_ROUND(d, s0, s1, s2, s3)
+ RESTORE_2(edx)
+ QUARTER_ROUND(d, s3, s0, s1, s2)
+ RESTORE_1(edx)
+ QUARTER_ROUND(d, s2, s3, s0, s1)
+ RESTORE_0(edx)
+ QUARTER_ROUND(d, s1, s2, s3, s0)
+ RESTORE_K
+ SAVE_2(ebx)
+ SAVE_1(eax)
+ SAVE_0(edi)
+
+ AS2( mov edi, [K_REG+4*4])
+ AS2( mov eax, [K_REG+5*4])
+ AS2( mov ebx, [K_REG+6*4])
+ AS2( mov edx, [K_REG+7*4])
+
+ QUARTER_ROUND(c, t0, t1, t2, t3)
+ RESTORE_2(ecx)
+ QUARTER_ROUND(c, t3, t0, t1, t2)
+ RESTORE_1(ecx)
+ QUARTER_ROUND(c, t2, t3, t0, t1)
+ RESTORE_0(ecx)
+ QUARTER_ROUND(c, t1, t2, t3, t0)
+ SAVE_2(ebx)
+ SAVE_1(eax)
+ SAVE_0(edi)
+
+ RESTORE_K
+ RESTORE_K_END
+ AS2( add K_REG, 8*4)
+ SAVE_K
+ AS2( cmp K_END_REG, K_REG)
+ ASJ( jne, 0, b)
+
+#undef QUARTER_ROUND
+#undef s0
+#undef s1
+#undef s2
+#undef s3
+#undef t0
+#undef t1
+#undef t2
+#undef t3
+
+ AS2( mov eax, [K_END_REG+0*4])
+ AS2( mov ecx, [K_END_REG+1*4])
+ AS2( mov esi, [K_END_REG+2*4])
+ AS2( mov edi, [K_END_REG+3*4])
+
+#define QUARTER_ROUND(a, b, c, d) \
+ AS2( movzx ebx, dl)\
+ AS2( movzx ebx, BYTE PTR [AS_REG_7+1+4*WORD_REG(bx)])\
+ AS2( shl ebx, 3*8)\
+ AS2( xor a, ebx)\
+ AS2( movzx ebx, dh)\
+ AS2( movzx ebx, BYTE PTR [AS_REG_7+1+4*WORD_REG(bx)])\
+ AS2( shl ebx, 2*8)\
+ AS2( xor b, ebx)\
+ AS2( shr edx, 16)\
+ AS2( movzx ebx, dl)\
+ AS2( shr edx, 8)\
+ AS2( movzx ebx, BYTE PTR [AS_REG_7+1+4*WORD_REG(bx)])\
+ AS2( shl ebx, 1*8)\
+ AS2( xor c, ebx)\
+ AS2( movzx ebx, BYTE PTR [AS_REG_7+1+4*WORD_REG(dx)])\
+ AS2( xor d, ebx)
+
+ QUARTER_ROUND(eax, ecx, esi, edi)
+ RESTORE_2(edx)
+ QUARTER_ROUND(edi, eax, ecx, esi)
+ RESTORE_1(edx)
+ QUARTER_ROUND(esi, edi, eax, ecx)
+ RESTORE_0(edx)
+ QUARTER_ROUND(ecx, esi, edi, eax)
+
+#undef QUARTER_ROUND
+
+#if CRYPTOPP_BOOL_X86
+ AS1(emms)
+ AS1(pop ebp)
+ #if defined(__GNUC__) || (defined(_MSC_VER) && _MSC_VER < 1300)
+ AS1(pop ebx)
+ #endif
+#endif
+
+#ifdef __GNUC__
+ ".att_syntax prefix;"
+ : "=a" (t0), "=c" (t1), "=S" (t2), "=D" (t3)
+ : "a" (Te), "D" (inBlock), "S" (k), "c" (kLoopEnd), "d" (g_cacheLineSize)
+ : "memory", "cc"
+ #if CRYPTOPP_BOOL_X64
+ , "%ebx", "%r8", "%r9", "%r10", "%r11", "%r12", "%r13", "%r14", "%r15"
+ #endif
+ );
+
+ if (xorBlock)
+ {
+ t0 ^= ((const word32 *)xorBlock)[0];
+ t1 ^= ((const word32 *)xorBlock)[1];
+ t2 ^= ((const word32 *)xorBlock)[2];
+ t3 ^= ((const word32 *)xorBlock)[3];
+ }
+ ((word32 *)outBlock)[0] = t0;
+ ((word32 *)outBlock)[1] = t1;
+ ((word32 *)outBlock)[2] = t2;
+ ((word32 *)outBlock)[3] = t3;
+#else
+ #if CRYPTOPP_BOOL_X64
+ mov rbx, [rsp + 6*8 + 7*8] ; xorBlock
+ #else
+ AS2( mov ebx, xorBlock)
+ #endif
+ AS2( test WORD_REG(bx), WORD_REG(bx))
+ ASJ( jz, 1, f)
+ AS2( xor eax, [WORD_REG(bx)+0*4])
+ AS2( xor ecx, [WORD_REG(bx)+1*4])
+ AS2( xor esi, [WORD_REG(bx)+2*4])
+ AS2( xor edi, [WORD_REG(bx)+3*4])
+ ASL(1)
+ #if CRYPTOPP_BOOL_X64
+ mov rbx, [rsp + 7*8 + 7*8] ; outBlock
+ #else
+ AS2( mov ebx, outBlock)
+ #endif
+ AS2( mov [WORD_REG(bx)+0*4], eax)
+ AS2( mov [WORD_REG(bx)+1*4], ecx)
+ AS2( mov [WORD_REG(bx)+2*4], esi)
+ AS2( mov [WORD_REG(bx)+3*4], edi)
+#endif
+
+#if CRYPTOPP_GENERATE_X64_MASM
+ pop r15
+ pop r14
+ pop r13
+ pop r12
+ pop rdi
+ pop rsi
+ pop rbx
+ ret
+ Rijndael_Enc_ProcessAndXorBlock ENDP
+#else
+ }
+ else
+#endif
+#endif // #ifdef CRYPTOPP_X86_ASM_AVAILABLE
+#ifndef CRYPTOPP_GENERATE_X64_MASM
+ {
+ word32 s0, s1, s2, s3, t0, t1, t2, t3;
+ const word32 *rk = m_key;
+
+ s0 = ((const word32 *)inBlock)[0] ^ rk[0];
+ s1 = ((const word32 *)inBlock)[1] ^ rk[1];
+ s2 = ((const word32 *)inBlock)[2] ^ rk[2];
+ s3 = ((const word32 *)inBlock)[3] ^ 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
+ const int cacheLineSize = GetCacheLineSize();
+ unsigned int i;
+ word32 u = 0;
+ for (i=0; i<1024; i+=cacheLineSize)
+ u &= *(const word32 *)(((const byte *)Te)+i);
+ u &= Te[255];
+ s0 |= u; s1 |= u; s2 |= u; s3 |= u;
+
+ // first round
+#ifdef IS_BIG_ENDIAN
+#define QUARTER_ROUND(t, a, b, c, d) \
+ a ^= rotrFixed(Te[byte(t)], 24); t >>= 8;\
+ b ^= rotrFixed(Te[byte(t)], 16); t >>= 8;\
+ c ^= rotrFixed(Te[byte(t)], 8); t >>= 8;\
+ d ^= Te[t];
+#else
+#define QUARTER_ROUND(t, a, b, c, d) \
+ d ^= Te[byte(t)]; t >>= 8;\
+ c ^= rotrFixed(Te[byte(t)], 8); t >>= 8;\
+ b ^= rotrFixed(Te[byte(t)], 16); t >>= 8;\
+ a ^= rotrFixed(Te[t], 24);
+#endif
+
+ QUARTER_ROUND(s3, t0, t1, t2, t3)
+ QUARTER_ROUND(s2, t3, t0, t1, t2)
+ QUARTER_ROUND(s1, t2, t3, t0, t1)
+ QUARTER_ROUND(s0, t1, t2, t3, t0)
+#undef QUARTER_ROUND
+
+ // Nr - 2 full rounds:
+ unsigned int r = m_rounds/2 - 1;
+ do
+ {
+#define QUARTER_ROUND(t, a, b, c, d) \
+ a ^= Te[3*256+byte(t)]; t >>= 8;\
+ b ^= Te[2*256+byte(t)]; t >>= 8;\
+ c ^= Te[1*256+byte(t)]; t >>= 8;\
+ d ^= Te[t];
+
+ s0 = rk[0]; s1 = rk[1]; s2 = rk[2]; s3 = rk[3];
+
+ QUARTER_ROUND(t3, s0, s1, s2, s3)
+ QUARTER_ROUND(t2, s3, s0, s1, s2)
+ QUARTER_ROUND(t1, s2, s3, s0, s1)
+ QUARTER_ROUND(t0, s1, s2, s3, s0)
+
+ t0 = rk[4]; t1 = rk[5]; t2 = rk[6]; t3 = rk[7];
+
+ QUARTER_ROUND(s3, t0, t1, t2, t3)
+ QUARTER_ROUND(s2, t3, t0, t1, t2)
+ QUARTER_ROUND(s1, t2, t3, t0, t1)
+ QUARTER_ROUND(s0, t1, t2, t3, t0)
+#undef QUARTER_ROUND
+
+ rk += 8;
+ } while (--r);
+
+ // timing attack countermeasure. see comments at top for more details
+ u = 0;
+ for (i=0; i<256; i+=cacheLineSize)
+ u &= *(const word32 *)(Se+i);
+ u &= *(const word32 *)(Se+252);
+ t0 |= u; t1 |= u; t2 |= u; t3 |= u;
+
+ word32 tbw[4];
+ byte *const tempBlock = (byte *)tbw;
+ word32 *const obw = (word32 *)outBlock;
+ const word32 *const xbw = (const word32 *)xorBlock;
+
+#define QUARTER_ROUND(t, a, b, c, d) \
+ tempBlock[a] = Se[byte(t)]; t >>= 8;\
+ tempBlock[b] = Se[byte(t)]; t >>= 8;\
+ tempBlock[c] = Se[byte(t)]; t >>= 8;\
+ tempBlock[d] = Se[t];
+
+ QUARTER_ROUND(t2, 15, 2, 5, 8)
+ QUARTER_ROUND(t1, 11, 14, 1, 4)
+ QUARTER_ROUND(t0, 7, 10, 13, 0)
+ QUARTER_ROUND(t3, 3, 6, 9, 12)
+#undef QUARTER_ROUND
+
+ if (xbw)
+ {
+ obw[0] = tbw[0] ^ xbw[0] ^ rk[0];
+ obw[1] = tbw[1] ^ xbw[1] ^ rk[1];
+ obw[2] = tbw[2] ^ xbw[2] ^ rk[2];
+ obw[3] = tbw[3] ^ xbw[3] ^ rk[3];
+ }
+ else
+ {
+ obw[0] = tbw[0] ^ rk[0];
+ obw[1] = tbw[1] ^ rk[1];
+ obw[2] = tbw[2] ^ rk[2];
+ obw[3] = tbw[3] ^ rk[3];
+ }
+ }
+}
+
+void Rijndael::Dec::ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const
+{
+ word32 s0, s1, s2, s3, t0, t1, t2, t3;
+ const word32 *rk = m_key;
+
+ s0 = ((const word32 *)inBlock)[0] ^ rk[0];
+ s1 = ((const word32 *)inBlock)[1] ^ rk[1];
+ s2 = ((const word32 *)inBlock)[2] ^ rk[2];
+ s3 = ((const word32 *)inBlock)[3] ^ 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
+ const int cacheLineSize = GetCacheLineSize();
+ unsigned int i;
+ word32 u = 0;
+ for (i=0; i<1024; i+=cacheLineSize)
+ u &= *(const word32 *)(((const byte *)Td)+i);
+ u &= Td[255];
+ s0 |= u; s1 |= u; s2 |= u; s3 |= u;
+
+ // first round
+#ifdef IS_BIG_ENDIAN
+#define QUARTER_ROUND(t, a, b, c, d) \
+ a ^= rotrFixed(Td[byte(t)], 24); t >>= 8;\
+ b ^= rotrFixed(Td[byte(t)], 16); t >>= 8;\
+ c ^= rotrFixed(Td[byte(t)], 8); t >>= 8;\
+ d ^= Td[t];
+#else
+#define QUARTER_ROUND(t, a, b, c, d) \
+ d ^= Td[byte(t)]; t >>= 8;\
+ c ^= rotrFixed(Td[byte(t)], 8); t >>= 8;\
+ b ^= rotrFixed(Td[byte(t)], 16); t >>= 8;\
+ a ^= rotrFixed(Td[t], 24);
+#endif
+
+ QUARTER_ROUND(s3, t2, t1, t0, t3)
+ QUARTER_ROUND(s2, t1, t0, t3, t2)
+ QUARTER_ROUND(s1, t0, t3, t2, t1)
+ QUARTER_ROUND(s0, t3, t2, t1, t0)
+#undef QUARTER_ROUND
+
+ // Nr - 2 full rounds:
+ unsigned int r = m_rounds/2 - 1;
+ do
+ {
+#define QUARTER_ROUND(t, a, b, c, d) \
+ a ^= Td[3*256+byte(t)]; t >>= 8;\
+ b ^= Td[2*256+byte(t)]; t >>= 8;\
+ c ^= Td[1*256+byte(t)]; t >>= 8;\
+ d ^= Td[t];
+
+ s0 = rk[0]; s1 = rk[1]; s2 = rk[2]; s3 = rk[3];
+
+ QUARTER_ROUND(t3, s2, s1, s0, s3)
+ QUARTER_ROUND(t2, s1, s0, s3, s2)
+ QUARTER_ROUND(t1, s0, s3, s2, s1)
+ QUARTER_ROUND(t0, s3, s2, s1, s0)
+
+ t0 = rk[4]; t1 = rk[5]; t2 = rk[6]; t3 = rk[7];
+
+ QUARTER_ROUND(s3, t2, t1, t0, t3)
+ QUARTER_ROUND(s2, t1, t0, t3, t2)
+ QUARTER_ROUND(s1, t0, t3, t2, t1)
+ QUARTER_ROUND(s0, t3, t2, t1, t0)
+#undef QUARTER_ROUND
+
+ rk += 8;
+ } while (--r);
+
+ // timing attack countermeasure. see comments at top for more details
+ u = 0;
+ for (i=0; i<256; i+=cacheLineSize)
+ u &= *(const word32 *)(Sd+i);
+ u &= *(const word32 *)(Sd+252);
+ t0 |= u; t1 |= u; t2 |= u; t3 |= u;
+
+ word32 tbw[4];
+ byte *const tempBlock = (byte *)tbw;
+ word32 *const obw = (word32 *)outBlock;
+ const word32 *const xbw = (const word32 *)xorBlock;
+
+#define QUARTER_ROUND(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];
+
+ QUARTER_ROUND(t2, 7, 2, 13, 8)
+ QUARTER_ROUND(t1, 3, 14, 9, 4)
+ QUARTER_ROUND(t0, 15, 10, 5, 0)
+ QUARTER_ROUND(t3, 11, 6, 1, 12)
+#undef QUARTER_ROUND
+
+ if (xbw)
+ {
+ obw[0] = tbw[0] ^ xbw[0] ^ rk[0];
+ obw[1] = tbw[1] ^ xbw[1] ^ rk[1];
+ obw[2] = tbw[2] ^ xbw[2] ^ rk[2];
+ obw[3] = tbw[3] ^ xbw[3] ^ rk[3];
+ }
+ else
+ {
+ obw[0] = tbw[0] ^ rk[0];
+ obw[1] = tbw[1] ^ rk[1];
+ obw[2] = tbw[2] ^ rk[2];
+ obw[3] = tbw[3] ^ rk[3];
+ }
+}
+
+NAMESPACE_END
+
+#endif
+#endif
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