mirror of
https://github.com/vanhoefm/fragattacks.git
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Crypto build cleanup: remove CONFIG_NO_AES_DECRYPT
Instead of using a define and conditional building of AES parts, move the AES decryption routines into a separate file.
This commit is contained in:
Johannes Berg
Jouni Malinen
parent
18abe7acb0
commit
381fcbc9f4
@ -40,7 +40,7 @@ OBJS_both += ../src/crypto/ms_funcs.o
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ifeq ($(CONFIG_TLS), internal)
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OBJS_both += ../src/crypto/sha1-internal.o
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OBJS_both += ../src/crypto/des-internal.o
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OBJS_both += ../src/crypto/aes-internal.o
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OBJS_both += ../src/crypto/aes-internal.o ../src/crypto/aes-internal-dec.o
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endif
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SHA256OBJS = ../src/crypto/sha256.o
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@ -613,8 +613,11 @@ ifdef CONFIG_NO_AES_EXTRAS
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CFLAGS += -DCONFIG_NO_AES_UNWRAP
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CFLAGS += -DCONFIG_NO_AES_CTR -DCONFIG_NO_AES_OMAC1
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CFLAGS += -DCONFIG_NO_AES_EAX -DCONFIG_NO_AES_CBC
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CFLAGS += -DCONFIG_NO_AES_DECRYPT
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CFLAGS += -DCONFIG_NO_AES_ENCRYPT_BLOCK
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else
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ifdef CONFIG_INTERNAL_AES
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AESOBJS += ../src/crypto/aes-internal-dec.o
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endif
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endif
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OBJS += $(SHA1OBJS)
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@ -696,7 +699,8 @@ clean-docs:
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rm -rf doc/latex doc/html
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rm -f doc/hostapd.{eps,png} hostapd-devel.pdf
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TEST_SRC_MILENAGE = ../src/hlr_auc_gw/milenage.c ../src/crypto/aes_wrap.c ../src/crypto/aes-internal.c ../src/utils/common.c ../src/utils/wpa_debug.o ../src/utils/os_$(CONFIG_OS).c
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TEST_SRC_MILENAGE = ../src/hlr_auc_gw/milenage.c ../src/crypto/aes_wrap.c ../src/crypto/aes-internal.c ../src/crypto/aes-internal-dec.c \
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../src/utils/common.c ../src/utils/wpa_debug.o ../src/utils/os_$(CONFIG_OS).c
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test-milenage: $(TEST_SRC_MILENAGE)
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$(CC) -o test-milenage -Wall -Werror $(TEST_SRC_MILENAGE) \
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-DTEST_MAIN_MILENAGE -I. \
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151
src/crypto/aes-internal-dec.c
Normal file
151
src/crypto/aes-internal-dec.c
Normal file
@ -0,0 +1,151 @@
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/*
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* AES (Rijndael) cipher - decrypt
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*
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* Modifications to public domain implementation:
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* - support only 128-bit keys
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* - cleanup
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* - use C pre-processor to make it easier to change S table access
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* - added option (AES_SMALL_TABLES) for reducing code size by about 8 kB at
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* cost of reduced throughput (quite small difference on Pentium 4,
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* 10-25% when using -O1 or -O2 optimization)
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*
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* Copyright (c) 2003-2005, Jouni Malinen <j@w1.fi>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* Alternatively, this software may be distributed under the terms of BSD
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* license.
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*
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* See README and COPYING for more details.
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*/
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#include "includes.h"
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#include "common.h"
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#include "crypto.h"
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#include "aes_i.h"
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/**
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* Expand the cipher key into the decryption key schedule.
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*
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* @return the number of rounds for the given cipher key size.
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*/
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void rijndaelKeySetupDec(u32 rk[/*44*/], const u8 cipherKey[])
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{
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int Nr = 10, i, j;
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u32 temp;
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/* expand the cipher key: */
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rijndaelKeySetupEnc(rk, cipherKey);
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/* invert the order of the round keys: */
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for (i = 0, j = 4*Nr; i < j; i += 4, j -= 4) {
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temp = rk[i ]; rk[i ] = rk[j ]; rk[j ] = temp;
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temp = rk[i + 1]; rk[i + 1] = rk[j + 1]; rk[j + 1] = temp;
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temp = rk[i + 2]; rk[i + 2] = rk[j + 2]; rk[j + 2] = temp;
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temp = rk[i + 3]; rk[i + 3] = rk[j + 3]; rk[j + 3] = temp;
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}
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/* apply the inverse MixColumn transform to all round keys but the
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* first and the last: */
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for (i = 1; i < Nr; i++) {
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rk += 4;
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for (j = 0; j < 4; j++) {
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rk[j] = TD0_(TE4((rk[j] >> 24) )) ^
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TD1_(TE4((rk[j] >> 16) & 0xff)) ^
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TD2_(TE4((rk[j] >> 8) & 0xff)) ^
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TD3_(TE4((rk[j] ) & 0xff));
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}
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}
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}
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void * aes_decrypt_init(const u8 *key, size_t len)
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{
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u32 *rk;
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if (len != 16)
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return NULL;
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rk = os_malloc(AES_PRIV_SIZE);
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if (rk == NULL)
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return NULL;
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rijndaelKeySetupDec(rk, key);
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return rk;
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}
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static void rijndaelDecrypt(const u32 rk[/*44*/], const u8 ct[16], u8 pt[16])
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{
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u32 s0, s1, s2, s3, t0, t1, t2, t3;
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const int Nr = 10;
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#ifndef FULL_UNROLL
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int r;
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#endif /* ?FULL_UNROLL */
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/*
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* map byte array block to cipher state
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* and add initial round key:
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*/
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s0 = GETU32(ct ) ^ rk[0];
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s1 = GETU32(ct + 4) ^ rk[1];
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s2 = GETU32(ct + 8) ^ rk[2];
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s3 = GETU32(ct + 12) ^ rk[3];
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#define ROUND(i,d,s) \
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d##0 = TD0(s##0) ^ TD1(s##3) ^ TD2(s##2) ^ TD3(s##1) ^ rk[4 * i]; \
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d##1 = TD0(s##1) ^ TD1(s##0) ^ TD2(s##3) ^ TD3(s##2) ^ rk[4 * i + 1]; \
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d##2 = TD0(s##2) ^ TD1(s##1) ^ TD2(s##0) ^ TD3(s##3) ^ rk[4 * i + 2]; \
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d##3 = TD0(s##3) ^ TD1(s##2) ^ TD2(s##1) ^ TD3(s##0) ^ rk[4 * i + 3]
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#ifdef FULL_UNROLL
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ROUND(1,t,s);
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ROUND(2,s,t);
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ROUND(3,t,s);
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ROUND(4,s,t);
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ROUND(5,t,s);
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ROUND(6,s,t);
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ROUND(7,t,s);
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ROUND(8,s,t);
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ROUND(9,t,s);
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rk += Nr << 2;
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#else /* !FULL_UNROLL */
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/* Nr - 1 full rounds: */
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r = Nr >> 1;
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for (;;) {
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ROUND(1,t,s);
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rk += 8;
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if (--r == 0)
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break;
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ROUND(0,s,t);
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}
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#endif /* ?FULL_UNROLL */
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#undef ROUND
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/*
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* apply last round and
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* map cipher state to byte array block:
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*/
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s0 = TD41(t0) ^ TD42(t3) ^ TD43(t2) ^ TD44(t1) ^ rk[0];
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PUTU32(pt , s0);
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s1 = TD41(t1) ^ TD42(t0) ^ TD43(t3) ^ TD44(t2) ^ rk[1];
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PUTU32(pt + 4, s1);
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s2 = TD41(t2) ^ TD42(t1) ^ TD43(t0) ^ TD44(t3) ^ rk[2];
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PUTU32(pt + 8, s2);
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s3 = TD41(t3) ^ TD42(t2) ^ TD43(t1) ^ TD44(t0) ^ rk[3];
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PUTU32(pt + 12, s3);
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}
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void aes_decrypt(void *ctx, const u8 *crypt, u8 *plain)
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{
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rijndaelDecrypt(ctx, crypt, plain);
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}
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void aes_decrypt_deinit(void *ctx)
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{
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os_memset(ctx, 0, AES_PRIV_SIZE);
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os_free(ctx);
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}
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@ -25,6 +25,7 @@
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#include "common.h"
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#include "crypto.h"
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#include "aes_i.h"
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/*
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* rijndael-alg-fst.c
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@ -52,9 +53,6 @@
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* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/* #define FULL_UNROLL */
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#define AES_SMALL_TABLES
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/*
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Te0[x] = S [x].[02, 01, 01, 03];
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@ -70,7 +68,7 @@ Td3[x] = Si[x].[09, 0d, 0b, 0e];
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Td4[x] = Si[x].[01, 01, 01, 01];
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*/
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static const u32 Te0[256] = {
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const u32 Te0[256] = {
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0xc66363a5U, 0xf87c7c84U, 0xee777799U, 0xf67b7b8dU,
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0xfff2f20dU, 0xd66b6bbdU, 0xde6f6fb1U, 0x91c5c554U,
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0x60303050U, 0x02010103U, 0xce6767a9U, 0x562b2b7dU,
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@ -137,7 +135,7 @@ static const u32 Te0[256] = {
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0x7bb0b0cbU, 0xa85454fcU, 0x6dbbbbd6U, 0x2c16163aU,
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};
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#ifndef AES_SMALL_TABLES
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static const u32 Te1[256] = {
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const u32 Te1[256] = {
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0xa5c66363U, 0x84f87c7cU, 0x99ee7777U, 0x8df67b7bU,
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0x0dfff2f2U, 0xbdd66b6bU, 0xb1de6f6fU, 0x5491c5c5U,
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0x50603030U, 0x03020101U, 0xa9ce6767U, 0x7d562b2bU,
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@ -203,7 +201,7 @@ static const u32 Te1[256] = {
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0xc3824141U, 0xb0299999U, 0x775a2d2dU, 0x111e0f0fU,
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0xcb7bb0b0U, 0xfca85454U, 0xd66dbbbbU, 0x3a2c1616U,
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};
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static const u32 Te2[256] = {
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const u32 Te2[256] = {
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0x63a5c663U, 0x7c84f87cU, 0x7799ee77U, 0x7b8df67bU,
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0xf20dfff2U, 0x6bbdd66bU, 0x6fb1de6fU, 0xc55491c5U,
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0x30506030U, 0x01030201U, 0x67a9ce67U, 0x2b7d562bU,
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@ -269,7 +267,7 @@ static const u32 Te2[256] = {
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0x41c38241U, 0x99b02999U, 0x2d775a2dU, 0x0f111e0fU,
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0xb0cb7bb0U, 0x54fca854U, 0xbbd66dbbU, 0x163a2c16U,
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};
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static const u32 Te3[256] = {
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const u32 Te3[256] = {
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0x6363a5c6U, 0x7c7c84f8U, 0x777799eeU, 0x7b7b8df6U,
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0xf2f20dffU, 0x6b6bbdd6U, 0x6f6fb1deU, 0xc5c55491U,
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@ -336,7 +334,7 @@ static const u32 Te3[256] = {
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0x4141c382U, 0x9999b029U, 0x2d2d775aU, 0x0f0f111eU,
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0xb0b0cb7bU, 0x5454fca8U, 0xbbbbd66dU, 0x16163a2cU,
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};
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static const u32 Te4[256] = {
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const u32 Te4[256] = {
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0x63636363U, 0x7c7c7c7cU, 0x77777777U, 0x7b7b7b7bU,
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0xf2f2f2f2U, 0x6b6b6b6bU, 0x6f6f6f6fU, 0xc5c5c5c5U,
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0x30303030U, 0x01010101U, 0x67676767U, 0x2b2b2b2bU,
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@ -403,7 +401,7 @@ static const u32 Te4[256] = {
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0xb0b0b0b0U, 0x54545454U, 0xbbbbbbbbU, 0x16161616U,
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};
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#endif /* AES_SMALL_TABLES */
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static const u32 Td0[256] = {
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const u32 Td0[256] = {
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0x51f4a750U, 0x7e416553U, 0x1a17a4c3U, 0x3a275e96U,
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0x3bab6bcbU, 0x1f9d45f1U, 0xacfa58abU, 0x4be30393U,
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0x2030fa55U, 0xad766df6U, 0x88cc7691U, 0xf5024c25U,
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@ -470,7 +468,7 @@ static const u32 Td0[256] = {
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0x7bcb8461U, 0xd532b670U, 0x486c5c74U, 0xd0b85742U,
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};
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#ifndef AES_SMALL_TABLES
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static const u32 Td1[256] = {
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const u32 Td1[256] = {
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0x5051f4a7U, 0x537e4165U, 0xc31a17a4U, 0x963a275eU,
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0xcb3bab6bU, 0xf11f9d45U, 0xabacfa58U, 0x934be303U,
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0x552030faU, 0xf6ad766dU, 0x9188cc76U, 0x25f5024cU,
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@ -536,7 +534,7 @@ static const u32 Td1[256] = {
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0x7139a801U, 0xde080cb3U, 0x9cd8b4e4U, 0x906456c1U,
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0x617bcb84U, 0x70d532b6U, 0x74486c5cU, 0x42d0b857U,
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};
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static const u32 Td2[256] = {
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const u32 Td2[256] = {
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0xa75051f4U, 0x65537e41U, 0xa4c31a17U, 0x5e963a27U,
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0x6bcb3babU, 0x45f11f9dU, 0x58abacfaU, 0x03934be3U,
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0xfa552030U, 0x6df6ad76U, 0x769188ccU, 0x4c25f502U,
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@ -603,7 +601,7 @@ static const u32 Td2[256] = {
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0x017139a8U, 0xb3de080cU, 0xe49cd8b4U, 0xc1906456U,
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0x84617bcbU, 0xb670d532U, 0x5c74486cU, 0x5742d0b8U,
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};
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static const u32 Td3[256] = {
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const u32 Td3[256] = {
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0xf4a75051U, 0x4165537eU, 0x17a4c31aU, 0x275e963aU,
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0xab6bcb3bU, 0x9d45f11fU, 0xfa58abacU, 0xe303934bU,
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0x30fa5520U, 0x766df6adU, 0xcc769188U, 0x024c25f5U,
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@ -669,7 +667,7 @@ static const u32 Td3[256] = {
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0xa8017139U, 0x0cb3de08U, 0xb4e49cd8U, 0x56c19064U,
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0xcb84617bU, 0x32b670d5U, 0x6c5c7448U, 0xb85742d0U,
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};
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static const u32 Td4[256] = {
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const u32 Td4[256] = {
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0x52525252U, 0x09090909U, 0x6a6a6a6aU, 0xd5d5d5d5U,
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0x30303030U, 0x36363636U, 0xa5a5a5a5U, 0x38383838U,
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0xbfbfbfbfU, 0x40404040U, 0xa3a3a3a3U, 0x9e9e9e9eU,
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@ -735,13 +733,13 @@ static const u32 Td4[256] = {
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0xe1e1e1e1U, 0x69696969U, 0x14141414U, 0x63636363U,
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0x55555555U, 0x21212121U, 0x0c0c0c0cU, 0x7d7d7d7dU,
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};
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static const u32 rcon[] = {
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const u32 rcon[] = {
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0x01000000, 0x02000000, 0x04000000, 0x08000000,
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0x10000000, 0x20000000, 0x40000000, 0x80000000,
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0x1B000000, 0x36000000, /* for 128-bit blocks, Rijndael never uses more than 10 rcon values */
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};
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#else /* AES_SMALL_TABLES */
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static const u8 Td4s[256] = {
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const u8 Td4s[256] = {
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0x52U, 0x09U, 0x6aU, 0xd5U, 0x30U, 0x36U, 0xa5U, 0x38U,
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0xbfU, 0x40U, 0xa3U, 0x9eU, 0x81U, 0xf3U, 0xd7U, 0xfbU,
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0x7cU, 0xe3U, 0x39U, 0x82U, 0x9bU, 0x2fU, 0xffU, 0x87U,
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@ -775,95 +773,11 @@ static const u8 Td4s[256] = {
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0x17U, 0x2bU, 0x04U, 0x7eU, 0xbaU, 0x77U, 0xd6U, 0x26U,
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0xe1U, 0x69U, 0x14U, 0x63U, 0x55U, 0x21U, 0x0cU, 0x7dU,
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};
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static const u8 rcons[] = {
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const u8 rcons[] = {
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0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1B, 0x36
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/* for 128-bit blocks, Rijndael never uses more than 10 rcon values */
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};
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#endif /* AES_SMALL_TABLES */
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#ifndef AES_SMALL_TABLES
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#define RCON(i) rcon[(i)]
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#define TE0(i) Te0[((i) >> 24) & 0xff]
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#define TE1(i) Te1[((i) >> 16) & 0xff]
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#define TE2(i) Te2[((i) >> 8) & 0xff]
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#define TE3(i) Te3[(i) & 0xff]
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#define TE41(i) (Te4[((i) >> 24) & 0xff] & 0xff000000)
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#define TE42(i) (Te4[((i) >> 16) & 0xff] & 0x00ff0000)
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#define TE43(i) (Te4[((i) >> 8) & 0xff] & 0x0000ff00)
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#define TE44(i) (Te4[(i) & 0xff] & 0x000000ff)
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#define TE421(i) (Te4[((i) >> 16) & 0xff] & 0xff000000)
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#define TE432(i) (Te4[((i) >> 8) & 0xff] & 0x00ff0000)
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#define TE443(i) (Te4[(i) & 0xff] & 0x0000ff00)
|
||||
#define TE414(i) (Te4[((i) >> 24) & 0xff] & 0x000000ff)
|
||||
#define TE4(i) (Te4[(i)] & 0x000000ff)
|
||||
|
||||
#define TD0(i) Td0[((i) >> 24) & 0xff]
|
||||
#define TD1(i) Td1[((i) >> 16) & 0xff]
|
||||
#define TD2(i) Td2[((i) >> 8) & 0xff]
|
||||
#define TD3(i) Td3[(i) & 0xff]
|
||||
#define TD41(i) (Td4[((i) >> 24) & 0xff] & 0xff000000)
|
||||
#define TD42(i) (Td4[((i) >> 16) & 0xff] & 0x00ff0000)
|
||||
#define TD43(i) (Td4[((i) >> 8) & 0xff] & 0x0000ff00)
|
||||
#define TD44(i) (Td4[(i) & 0xff] & 0x000000ff)
|
||||
#define TD0_(i) Td0[(i) & 0xff]
|
||||
#define TD1_(i) Td1[(i) & 0xff]
|
||||
#define TD2_(i) Td2[(i) & 0xff]
|
||||
#define TD3_(i) Td3[(i) & 0xff]
|
||||
|
||||
#else /* AES_SMALL_TABLES */
|
||||
|
||||
#define RCON(i) (rcons[(i)] << 24)
|
||||
|
||||
static inline u32 rotr(u32 val, int bits)
|
||||
{
|
||||
return (val >> bits) | (val << (32 - bits));
|
||||
}
|
||||
|
||||
#define TE0(i) Te0[((i) >> 24) & 0xff]
|
||||
#define TE1(i) rotr(Te0[((i) >> 16) & 0xff], 8)
|
||||
#define TE2(i) rotr(Te0[((i) >> 8) & 0xff], 16)
|
||||
#define TE3(i) rotr(Te0[(i) & 0xff], 24)
|
||||
#define TE41(i) ((Te0[((i) >> 24) & 0xff] << 8) & 0xff000000)
|
||||
#define TE42(i) (Te0[((i) >> 16) & 0xff] & 0x00ff0000)
|
||||
#define TE43(i) (Te0[((i) >> 8) & 0xff] & 0x0000ff00)
|
||||
#define TE44(i) ((Te0[(i) & 0xff] >> 8) & 0x000000ff)
|
||||
#define TE421(i) ((Te0[((i) >> 16) & 0xff] << 8) & 0xff000000)
|
||||
#define TE432(i) (Te0[((i) >> 8) & 0xff] & 0x00ff0000)
|
||||
#define TE443(i) (Te0[(i) & 0xff] & 0x0000ff00)
|
||||
#define TE414(i) ((Te0[((i) >> 24) & 0xff] >> 8) & 0x000000ff)
|
||||
#define TE4(i) ((Te0[(i)] >> 8) & 0x000000ff)
|
||||
|
||||
#define TD0(i) Td0[((i) >> 24) & 0xff]
|
||||
#define TD1(i) rotr(Td0[((i) >> 16) & 0xff], 8)
|
||||
#define TD2(i) rotr(Td0[((i) >> 8) & 0xff], 16)
|
||||
#define TD3(i) rotr(Td0[(i) & 0xff], 24)
|
||||
#define TD41(i) (Td4s[((i) >> 24) & 0xff] << 24)
|
||||
#define TD42(i) (Td4s[((i) >> 16) & 0xff] << 16)
|
||||
#define TD43(i) (Td4s[((i) >> 8) & 0xff] << 8)
|
||||
#define TD44(i) (Td4s[(i) & 0xff])
|
||||
#define TD0_(i) Td0[(i) & 0xff]
|
||||
#define TD1_(i) rotr(Td0[(i) & 0xff], 8)
|
||||
#define TD2_(i) rotr(Td0[(i) & 0xff], 16)
|
||||
#define TD3_(i) rotr(Td0[(i) & 0xff], 24)
|
||||
|
||||
#endif /* AES_SMALL_TABLES */
|
||||
|
||||
#define SWAP(x) (_lrotl(x, 8) & 0x00ff00ff | _lrotr(x, 8) & 0xff00ff00)
|
||||
|
||||
#ifdef _MSC_VER
|
||||
#define GETU32(p) SWAP(*((u32 *)(p)))
|
||||
#define PUTU32(ct, st) { *((u32 *)(ct)) = SWAP((st)); }
|
||||
#else
|
||||
#define GETU32(pt) (((u32)(pt)[0] << 24) ^ ((u32)(pt)[1] << 16) ^ \
|
||||
((u32)(pt)[2] << 8) ^ ((u32)(pt)[3]))
|
||||
#define PUTU32(ct, st) { \
|
||||
(ct)[0] = (u8)((st) >> 24); (ct)[1] = (u8)((st) >> 16); \
|
||||
(ct)[2] = (u8)((st) >> 8); (ct)[3] = (u8)(st); }
|
||||
#endif
|
||||
|
||||
/**
|
||||
* Expand the cipher key into the encryption key schedule.
|
||||
*
|
||||
@ -890,40 +804,6 @@ void rijndaelKeySetupEnc(u32 rk[/*44*/], const u8 cipherKey[])
|
||||
}
|
||||
}
|
||||
|
||||
#ifndef CONFIG_NO_AES_DECRYPT
|
||||
/**
|
||||
* Expand the cipher key into the decryption key schedule.
|
||||
*
|
||||
* @return the number of rounds for the given cipher key size.
|
||||
*/
|
||||
void rijndaelKeySetupDec(u32 rk[/*44*/], const u8 cipherKey[])
|
||||
{
|
||||
int Nr = 10, i, j;
|
||||
u32 temp;
|
||||
|
||||
/* expand the cipher key: */
|
||||
rijndaelKeySetupEnc(rk, cipherKey);
|
||||
/* invert the order of the round keys: */
|
||||
for (i = 0, j = 4*Nr; 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 < Nr; i++) {
|
||||
rk += 4;
|
||||
for (j = 0; j < 4; j++) {
|
||||
rk[j] = TD0_(TE4((rk[j] >> 24) )) ^
|
||||
TD1_(TE4((rk[j] >> 16) & 0xff)) ^
|
||||
TD2_(TE4((rk[j] >> 8) & 0xff)) ^
|
||||
TD3_(TE4((rk[j] ) & 0xff));
|
||||
}
|
||||
}
|
||||
}
|
||||
#endif /* CONFIG_NO_AES_DECRYPT */
|
||||
|
||||
#ifndef CONFIG_NO_AES_ENCRYPT
|
||||
void rijndaelEncrypt(const u32 rk[/*44*/], const u8 pt[16], u8 ct[16])
|
||||
{
|
||||
@ -991,82 +871,7 @@ d##3 = TE0(s##3) ^ TE1(s##0) ^ TE2(s##1) ^ TE3(s##2) ^ rk[4 * i + 3]
|
||||
s3 = TE41(t3) ^ TE42(t0) ^ TE43(t1) ^ TE44(t2) ^ rk[3];
|
||||
PUTU32(ct + 12, s3);
|
||||
}
|
||||
#endif /* CONFIG_NO_AES_ENCRYPT */
|
||||
|
||||
void rijndaelDecrypt(const u32 rk[/*44*/], const u8 ct[16], u8 pt[16])
|
||||
{
|
||||
u32 s0, s1, s2, s3, t0, t1, t2, t3;
|
||||
const int Nr = 10;
|
||||
#ifndef FULL_UNROLL
|
||||
int r;
|
||||
#endif /* ?FULL_UNROLL */
|
||||
|
||||
/*
|
||||
* map byte array block to cipher state
|
||||
* and add initial round key:
|
||||
*/
|
||||
s0 = GETU32(ct ) ^ rk[0];
|
||||
s1 = GETU32(ct + 4) ^ rk[1];
|
||||
s2 = GETU32(ct + 8) ^ rk[2];
|
||||
s3 = GETU32(ct + 12) ^ rk[3];
|
||||
|
||||
#define ROUND(i,d,s) \
|
||||
d##0 = TD0(s##0) ^ TD1(s##3) ^ TD2(s##2) ^ TD3(s##1) ^ rk[4 * i]; \
|
||||
d##1 = TD0(s##1) ^ TD1(s##0) ^ TD2(s##3) ^ TD3(s##2) ^ rk[4 * i + 1]; \
|
||||
d##2 = TD0(s##2) ^ TD1(s##1) ^ TD2(s##0) ^ TD3(s##3) ^ rk[4 * i + 2]; \
|
||||
d##3 = TD0(s##3) ^ TD1(s##2) ^ TD2(s##1) ^ TD3(s##0) ^ rk[4 * i + 3]
|
||||
|
||||
#ifdef FULL_UNROLL
|
||||
|
||||
ROUND(1,t,s);
|
||||
ROUND(2,s,t);
|
||||
ROUND(3,t,s);
|
||||
ROUND(4,s,t);
|
||||
ROUND(5,t,s);
|
||||
ROUND(6,s,t);
|
||||
ROUND(7,t,s);
|
||||
ROUND(8,s,t);
|
||||
ROUND(9,t,s);
|
||||
|
||||
rk += Nr << 2;
|
||||
|
||||
#else /* !FULL_UNROLL */
|
||||
|
||||
/* Nr - 1 full rounds: */
|
||||
r = Nr >> 1;
|
||||
for (;;) {
|
||||
ROUND(1,t,s);
|
||||
rk += 8;
|
||||
if (--r == 0)
|
||||
break;
|
||||
ROUND(0,s,t);
|
||||
}
|
||||
|
||||
#endif /* ?FULL_UNROLL */
|
||||
|
||||
#undef ROUND
|
||||
|
||||
/*
|
||||
* apply last round and
|
||||
* map cipher state to byte array block:
|
||||
*/
|
||||
s0 = TD41(t0) ^ TD42(t3) ^ TD43(t2) ^ TD44(t1) ^ rk[0];
|
||||
PUTU32(pt , s0);
|
||||
s1 = TD41(t1) ^ TD42(t0) ^ TD43(t3) ^ TD44(t2) ^ rk[1];
|
||||
PUTU32(pt + 4, s1);
|
||||
s2 = TD41(t2) ^ TD42(t1) ^ TD43(t0) ^ TD44(t3) ^ rk[2];
|
||||
PUTU32(pt + 8, s2);
|
||||
s3 = TD41(t3) ^ TD42(t2) ^ TD43(t1) ^ TD44(t0) ^ rk[3];
|
||||
PUTU32(pt + 12, s3);
|
||||
}
|
||||
|
||||
|
||||
|
||||
/* Generic wrapper functions for AES functions */
|
||||
|
||||
#define AES_PRIV_SIZE (4 * 44)
|
||||
|
||||
#ifndef CONFIG_NO_AES_ENCRYPT
|
||||
void * aes_encrypt_init(const u8 *key, size_t len)
|
||||
{
|
||||
u32 *rk;
|
||||
@ -1092,31 +897,3 @@ void aes_encrypt_deinit(void *ctx)
|
||||
os_free(ctx);
|
||||
}
|
||||
#endif /* CONFIG_NO_AES_ENCRYPT */
|
||||
|
||||
|
||||
#ifndef CONFIG_NO_AES_DECRYPT
|
||||
void * aes_decrypt_init(const u8 *key, size_t len)
|
||||
{
|
||||
u32 *rk;
|
||||
if (len != 16)
|
||||
return NULL;
|
||||
rk = os_malloc(AES_PRIV_SIZE);
|
||||
if (rk == NULL)
|
||||
return NULL;
|
||||
rijndaelKeySetupDec(rk, key);
|
||||
return rk;
|
||||
}
|
||||
|
||||
|
||||
void aes_decrypt(void *ctx, const u8 *crypt, u8 *plain)
|
||||
{
|
||||
rijndaelDecrypt(ctx, crypt, plain);
|
||||
}
|
||||
|
||||
|
||||
void aes_decrypt_deinit(void *ctx)
|
||||
{
|
||||
os_memset(ctx, 0, AES_PRIV_SIZE);
|
||||
os_free(ctx);
|
||||
}
|
||||
#endif /* CONFIG_NO_AES_DECRYPT */
|
||||
|
||||
122
src/crypto/aes_i.h
Normal file
122
src/crypto/aes_i.h
Normal file
@ -0,0 +1,122 @@
|
||||
/*
|
||||
* AES (Rijndael) cipher
|
||||
* Copyright (c) 2003-2005, Jouni Malinen <j@w1.fi>
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License version 2 as
|
||||
* published by the Free Software Foundation.
|
||||
*
|
||||
* Alternatively, this software may be distributed under the terms of BSD
|
||||
* license.
|
||||
*
|
||||
* See README and COPYING for more details.
|
||||
*/
|
||||
|
||||
#ifndef AES_I_H
|
||||
#define AES_I_H
|
||||
|
||||
#include "aes.h"
|
||||
|
||||
/* #define FULL_UNROLL */
|
||||
#define AES_SMALL_TABLES
|
||||
|
||||
extern const u32 Te0[256];
|
||||
extern const u32 Te1[256];
|
||||
extern const u32 Te2[256];
|
||||
extern const u32 Te3[256];
|
||||
extern const u32 Te4[256];
|
||||
extern const u32 Td0[256];
|
||||
extern const u32 Td1[256];
|
||||
extern const u32 Td2[256];
|
||||
extern const u32 Td3[256];
|
||||
extern const u32 Td4[256];
|
||||
extern const u32 rcon[10];
|
||||
extern const u8 Td4s[256];
|
||||
extern const u8 rcons[10];
|
||||
|
||||
#ifndef AES_SMALL_TABLES
|
||||
|
||||
#define RCON(i) rcon[(i)]
|
||||
|
||||
#define TE0(i) Te0[((i) >> 24) & 0xff]
|
||||
#define TE1(i) Te1[((i) >> 16) & 0xff]
|
||||
#define TE2(i) Te2[((i) >> 8) & 0xff]
|
||||
#define TE3(i) Te3[(i) & 0xff]
|
||||
#define TE41(i) (Te4[((i) >> 24) & 0xff] & 0xff000000)
|
||||
#define TE42(i) (Te4[((i) >> 16) & 0xff] & 0x00ff0000)
|
||||
#define TE43(i) (Te4[((i) >> 8) & 0xff] & 0x0000ff00)
|
||||
#define TE44(i) (Te4[(i) & 0xff] & 0x000000ff)
|
||||
#define TE421(i) (Te4[((i) >> 16) & 0xff] & 0xff000000)
|
||||
#define TE432(i) (Te4[((i) >> 8) & 0xff] & 0x00ff0000)
|
||||
#define TE443(i) (Te4[(i) & 0xff] & 0x0000ff00)
|
||||
#define TE414(i) (Te4[((i) >> 24) & 0xff] & 0x000000ff)
|
||||
#define TE4(i) (Te4[(i)] & 0x000000ff)
|
||||
|
||||
#define TD0(i) Td0[((i) >> 24) & 0xff]
|
||||
#define TD1(i) Td1[((i) >> 16) & 0xff]
|
||||
#define TD2(i) Td2[((i) >> 8) & 0xff]
|
||||
#define TD3(i) Td3[(i) & 0xff]
|
||||
#define TD41(i) (Td4[((i) >> 24) & 0xff] & 0xff000000)
|
||||
#define TD42(i) (Td4[((i) >> 16) & 0xff] & 0x00ff0000)
|
||||
#define TD43(i) (Td4[((i) >> 8) & 0xff] & 0x0000ff00)
|
||||
#define TD44(i) (Td4[(i) & 0xff] & 0x000000ff)
|
||||
#define TD0_(i) Td0[(i) & 0xff]
|
||||
#define TD1_(i) Td1[(i) & 0xff]
|
||||
#define TD2_(i) Td2[(i) & 0xff]
|
||||
#define TD3_(i) Td3[(i) & 0xff]
|
||||
|
||||
#else /* AES_SMALL_TABLES */
|
||||
|
||||
#define RCON(i) (rcons[(i)] << 24)
|
||||
|
||||
static inline u32 rotr(u32 val, int bits)
|
||||
{
|
||||
return (val >> bits) | (val << (32 - bits));
|
||||
}
|
||||
|
||||
#define TE0(i) Te0[((i) >> 24) & 0xff]
|
||||
#define TE1(i) rotr(Te0[((i) >> 16) & 0xff], 8)
|
||||
#define TE2(i) rotr(Te0[((i) >> 8) & 0xff], 16)
|
||||
#define TE3(i) rotr(Te0[(i) & 0xff], 24)
|
||||
#define TE41(i) ((Te0[((i) >> 24) & 0xff] << 8) & 0xff000000)
|
||||
#define TE42(i) (Te0[((i) >> 16) & 0xff] & 0x00ff0000)
|
||||
#define TE43(i) (Te0[((i) >> 8) & 0xff] & 0x0000ff00)
|
||||
#define TE44(i) ((Te0[(i) & 0xff] >> 8) & 0x000000ff)
|
||||
#define TE421(i) ((Te0[((i) >> 16) & 0xff] << 8) & 0xff000000)
|
||||
#define TE432(i) (Te0[((i) >> 8) & 0xff] & 0x00ff0000)
|
||||
#define TE443(i) (Te0[(i) & 0xff] & 0x0000ff00)
|
||||
#define TE414(i) ((Te0[((i) >> 24) & 0xff] >> 8) & 0x000000ff)
|
||||
#define TE4(i) ((Te0[(i)] >> 8) & 0x000000ff)
|
||||
|
||||
#define TD0(i) Td0[((i) >> 24) & 0xff]
|
||||
#define TD1(i) rotr(Td0[((i) >> 16) & 0xff], 8)
|
||||
#define TD2(i) rotr(Td0[((i) >> 8) & 0xff], 16)
|
||||
#define TD3(i) rotr(Td0[(i) & 0xff], 24)
|
||||
#define TD41(i) (Td4s[((i) >> 24) & 0xff] << 24)
|
||||
#define TD42(i) (Td4s[((i) >> 16) & 0xff] << 16)
|
||||
#define TD43(i) (Td4s[((i) >> 8) & 0xff] << 8)
|
||||
#define TD44(i) (Td4s[(i) & 0xff])
|
||||
#define TD0_(i) Td0[(i) & 0xff]
|
||||
#define TD1_(i) rotr(Td0[(i) & 0xff], 8)
|
||||
#define TD2_(i) rotr(Td0[(i) & 0xff], 16)
|
||||
#define TD3_(i) rotr(Td0[(i) & 0xff], 24)
|
||||
|
||||
#endif /* AES_SMALL_TABLES */
|
||||
|
||||
#ifdef _MSC_VER
|
||||
#define SWAP(x) (_lrotl(x, 8) & 0x00ff00ff | _lrotr(x, 8) & 0xff00ff00)
|
||||
#define GETU32(p) SWAP(*((u32 *)(p)))
|
||||
#define PUTU32(ct, st) { *((u32 *)(ct)) = SWAP((st)); }
|
||||
#else
|
||||
#define GETU32(pt) (((u32)(pt)[0] << 24) ^ ((u32)(pt)[1] << 16) ^ \
|
||||
((u32)(pt)[2] << 8) ^ ((u32)(pt)[3]))
|
||||
#define PUTU32(ct, st) { \
|
||||
(ct)[0] = (u8)((st) >> 24); (ct)[1] = (u8)((st) >> 16); \
|
||||
(ct)[2] = (u8)((st) >> 8); (ct)[3] = (u8)(st); }
|
||||
#endif
|
||||
|
||||
#define AES_PRIV_SIZE (4 * 44)
|
||||
|
||||
void rijndaelKeySetupEnc(u32 rk[/*44*/], const u8 cipherKey[]);
|
||||
|
||||
#endif /* AES_I_H */
|
||||
@ -910,7 +910,7 @@ CONFIG_INTERNAL_MD5=y
|
||||
endif
|
||||
|
||||
ifdef CONFIG_INTERNAL_AES
|
||||
AESOBJS += ../src/crypto/aes-internal.o
|
||||
AESOBJS += ../src/crypto/aes-internal.o ../src/crypto/aes-internal-dec.o
|
||||
endif
|
||||
ifdef CONFIG_INTERNAL_SHA1
|
||||
SHA1OBJS += ../src/crypto/sha1-internal.o
|
||||
|
||||
Loading…
Reference in New Issue
Block a user