mirror of https://github.com/openzfs/zfs.git
581 lines
15 KiB
C
581 lines
15 KiB
C
/*
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* ---------------------------------------------------------------------------
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* Copyright (c) 1998-2007, Brian Gladman, Worcester, UK. All rights reserved.
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*
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* LICENSE TERMS
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*
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* The free distribution and use of this software is allowed (with or without
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* changes) provided that:
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*
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* 1. source code distributions include the above copyright notice, this
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* list of conditions and the following disclaimer;
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*
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* 2. binary distributions include the above copyright notice, this list
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* of conditions and the following disclaimer in their documentation;
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*
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* 3. the name of the copyright holder is not used to endorse products
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* built using this software without specific written permission.
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*
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* DISCLAIMER
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*
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* This software is provided 'as is' with no explicit or implied warranties
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* in respect of its properties, including, but not limited to, correctness
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* and/or fitness for purpose.
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* ---------------------------------------------------------------------------
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* Issue Date: 20/12/2007
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*/
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#include <aes/aes_impl.h>
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#include "aesopt.h"
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#include "aestab.h"
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#include "aestab2.h"
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/*
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* Initialise the key schedule from the user supplied key. The key
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* length can be specified in bytes, with legal values of 16, 24
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* and 32, or in bits, with legal values of 128, 192 and 256. These
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* values correspond with Nk values of 4, 6 and 8 respectively.
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*
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* The following macros implement a single cycle in the key
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* schedule generation process. The number of cycles needed
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* for each cx->n_col and nk value is:
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*
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* nk = 4 5 6 7 8
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* ------------------------------
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* cx->n_col = 4 10 9 8 7 7
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* cx->n_col = 5 14 11 10 9 9
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* cx->n_col = 6 19 15 12 11 11
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* cx->n_col = 7 21 19 16 13 14
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* cx->n_col = 8 29 23 19 17 14
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*/
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/*
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* OpenSolaris changes
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* 1. Added header files aes_impl.h and aestab2.h
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* 2. Changed uint_8t and uint_32t to uint8_t and uint32_t
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* 3. Remove code under ifdef USE_VIA_ACE_IF_PRESENT (always undefined)
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* 4. Removed always-defined ifdefs FUNCS_IN_C, ENC_KEYING_IN_C,
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* AES_128, AES_192, AES_256, AES_VAR defines
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* 5. Changed aes_encrypt_key* aes_decrypt_key* functions to "static void"
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* 6. Changed N_COLS to MAX_AES_NB
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* 7. Replaced functions aes_encrypt_key and aes_decrypt_key with
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* OpenSolaris-compatible functions rijndael_key_setup_enc_amd64 and
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* rijndael_key_setup_dec_amd64
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* 8. cstyled code and removed lint warnings
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*/
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#if defined(REDUCE_CODE_SIZE)
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#define ls_box ls_sub
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uint32_t ls_sub(const uint32_t t, const uint32_t n);
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#define inv_mcol im_sub
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uint32_t im_sub(const uint32_t x);
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#ifdef ENC_KS_UNROLL
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#undef ENC_KS_UNROLL
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#endif
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#ifdef DEC_KS_UNROLL
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#undef DEC_KS_UNROLL
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#endif
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#endif /* REDUCE_CODE_SIZE */
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#define ke4(k, i) \
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{ k[4 * (i) + 4] = ss[0] ^= ls_box(ss[3], 3) ^ t_use(r, c)[i]; \
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k[4 * (i) + 5] = ss[1] ^= ss[0]; \
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k[4 * (i) + 6] = ss[2] ^= ss[1]; \
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k[4 * (i) + 7] = ss[3] ^= ss[2]; \
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}
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static void
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aes_encrypt_key128(const unsigned char *key, uint32_t rk[])
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{
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uint32_t ss[4];
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rk[0] = ss[0] = word_in(key, 0);
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rk[1] = ss[1] = word_in(key, 1);
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rk[2] = ss[2] = word_in(key, 2);
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rk[3] = ss[3] = word_in(key, 3);
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#ifdef ENC_KS_UNROLL
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ke4(rk, 0); ke4(rk, 1);
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ke4(rk, 2); ke4(rk, 3);
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ke4(rk, 4); ke4(rk, 5);
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ke4(rk, 6); ke4(rk, 7);
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ke4(rk, 8);
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#else
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{
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uint32_t i;
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for (i = 0; i < 9; ++i)
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ke4(rk, i);
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}
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#endif /* ENC_KS_UNROLL */
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ke4(rk, 9);
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}
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#define kef6(k, i) \
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{ k[6 * (i) + 6] = ss[0] ^= ls_box(ss[5], 3) ^ t_use(r, c)[i]; \
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k[6 * (i) + 7] = ss[1] ^= ss[0]; \
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k[6 * (i) + 8] = ss[2] ^= ss[1]; \
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k[6 * (i) + 9] = ss[3] ^= ss[2]; \
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}
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#define ke6(k, i) \
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{ kef6(k, i); \
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k[6 * (i) + 10] = ss[4] ^= ss[3]; \
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k[6 * (i) + 11] = ss[5] ^= ss[4]; \
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}
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static void
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aes_encrypt_key192(const unsigned char *key, uint32_t rk[])
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{
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uint32_t ss[6];
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rk[0] = ss[0] = word_in(key, 0);
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rk[1] = ss[1] = word_in(key, 1);
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rk[2] = ss[2] = word_in(key, 2);
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rk[3] = ss[3] = word_in(key, 3);
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rk[4] = ss[4] = word_in(key, 4);
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rk[5] = ss[5] = word_in(key, 5);
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#ifdef ENC_KS_UNROLL
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ke6(rk, 0); ke6(rk, 1);
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ke6(rk, 2); ke6(rk, 3);
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ke6(rk, 4); ke6(rk, 5);
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ke6(rk, 6);
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#else
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{
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uint32_t i;
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for (i = 0; i < 7; ++i)
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ke6(rk, i);
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}
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#endif /* ENC_KS_UNROLL */
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kef6(rk, 7);
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}
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#define kef8(k, i) \
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{ k[8 * (i) + 8] = ss[0] ^= ls_box(ss[7], 3) ^ t_use(r, c)[i]; \
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k[8 * (i) + 9] = ss[1] ^= ss[0]; \
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k[8 * (i) + 10] = ss[2] ^= ss[1]; \
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k[8 * (i) + 11] = ss[3] ^= ss[2]; \
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}
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#define ke8(k, i) \
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{ kef8(k, i); \
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k[8 * (i) + 12] = ss[4] ^= ls_box(ss[3], 0); \
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k[8 * (i) + 13] = ss[5] ^= ss[4]; \
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k[8 * (i) + 14] = ss[6] ^= ss[5]; \
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k[8 * (i) + 15] = ss[7] ^= ss[6]; \
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}
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static void
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aes_encrypt_key256(const unsigned char *key, uint32_t rk[])
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{
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uint32_t ss[8];
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rk[0] = ss[0] = word_in(key, 0);
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rk[1] = ss[1] = word_in(key, 1);
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rk[2] = ss[2] = word_in(key, 2);
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rk[3] = ss[3] = word_in(key, 3);
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rk[4] = ss[4] = word_in(key, 4);
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rk[5] = ss[5] = word_in(key, 5);
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rk[6] = ss[6] = word_in(key, 6);
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rk[7] = ss[7] = word_in(key, 7);
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#ifdef ENC_KS_UNROLL
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ke8(rk, 0); ke8(rk, 1);
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ke8(rk, 2); ke8(rk, 3);
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ke8(rk, 4); ke8(rk, 5);
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#else
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{
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uint32_t i;
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for (i = 0; i < 6; ++i)
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ke8(rk, i);
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}
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#endif /* ENC_KS_UNROLL */
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kef8(rk, 6);
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}
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/*
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* Expand the cipher key into the encryption 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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* The size of the key schedule depends on the number of rounds
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* (which can be computed from the size of the key), i.e. 4 * (Nr + 1).
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*
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* Parameters:
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* rk AES key schedule 32-bit array to be initialized
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* cipherKey User key
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* keyBits AES key size (128, 192, or 256 bits)
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*/
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int
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rijndael_key_setup_enc_amd64(uint32_t rk[], const uint32_t cipherKey[],
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int keyBits)
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{
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switch (keyBits) {
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case 128:
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aes_encrypt_key128((unsigned char *)&cipherKey[0], rk);
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return (10);
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case 192:
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aes_encrypt_key192((unsigned char *)&cipherKey[0], rk);
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return (12);
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case 256:
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aes_encrypt_key256((unsigned char *)&cipherKey[0], rk);
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return (14);
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default: /* should never get here */
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break;
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}
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return (0);
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}
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/* this is used to store the decryption round keys */
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/* in forward or reverse order */
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#ifdef AES_REV_DKS
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#define v(n, i) ((n) - (i) + 2 * ((i) & 3))
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#else
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#define v(n, i) (i)
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#endif
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#if DEC_ROUND == NO_TABLES
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#define ff(x) (x)
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#else
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#define ff(x) inv_mcol(x)
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#if defined(dec_imvars)
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#define d_vars dec_imvars
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#endif
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#endif /* FUNCS_IN_C & DEC_KEYING_IN_C */
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#define k4e(k, i) \
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{ k[v(40, (4 * (i)) + 4)] = ss[0] ^= ls_box(ss[3], 3) ^ t_use(r, c)[i]; \
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k[v(40, (4 * (i)) + 5)] = ss[1] ^= ss[0]; \
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k[v(40, (4 * (i)) + 6)] = ss[2] ^= ss[1]; \
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k[v(40, (4 * (i)) + 7)] = ss[3] ^= ss[2]; \
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}
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#if 1
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#define kdf4(k, i) \
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{ ss[0] = ss[0] ^ ss[2] ^ ss[1] ^ ss[3]; \
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ss[1] = ss[1] ^ ss[3]; \
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ss[2] = ss[2] ^ ss[3]; \
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ss[4] = ls_box(ss[(i + 3) % 4], 3) ^ t_use(r, c)[i]; \
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ss[i % 4] ^= ss[4]; \
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ss[4] ^= k[v(40, (4 * (i)))]; k[v(40, (4 * (i)) + 4)] = ff(ss[4]); \
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ss[4] ^= k[v(40, (4 * (i)) + 1)]; k[v(40, (4 * (i)) + 5)] = ff(ss[4]); \
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ss[4] ^= k[v(40, (4 * (i)) + 2)]; k[v(40, (4 * (i)) + 6)] = ff(ss[4]); \
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ss[4] ^= k[v(40, (4 * (i)) + 3)]; k[v(40, (4 * (i)) + 7)] = ff(ss[4]); \
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}
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#define kd4(k, i) \
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{ ss[4] = ls_box(ss[(i + 3) % 4], 3) ^ t_use(r, c)[i]; \
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ss[i % 4] ^= ss[4]; ss[4] = ff(ss[4]); \
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k[v(40, (4 * (i)) + 4)] = ss[4] ^= k[v(40, (4 * (i)))]; \
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k[v(40, (4 * (i)) + 5)] = ss[4] ^= k[v(40, (4 * (i)) + 1)]; \
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k[v(40, (4 * (i)) + 6)] = ss[4] ^= k[v(40, (4 * (i)) + 2)]; \
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k[v(40, (4 * (i)) + 7)] = ss[4] ^= k[v(40, (4 * (i)) + 3)]; \
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}
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#define kdl4(k, i) \
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{ ss[4] = ls_box(ss[(i + 3) % 4], 3) ^ t_use(r, c)[i]; \
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ss[i % 4] ^= ss[4]; \
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k[v(40, (4 * (i)) + 4)] = (ss[0] ^= ss[1]) ^ ss[2] ^ ss[3]; \
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k[v(40, (4 * (i)) + 5)] = ss[1] ^ ss[3]; \
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k[v(40, (4 * (i)) + 6)] = ss[0]; \
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k[v(40, (4 * (i)) + 7)] = ss[1]; \
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}
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#else
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#define kdf4(k, i) \
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{ ss[0] ^= ls_box(ss[3], 3) ^ t_use(r, c)[i]; \
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k[v(40, (4 * (i)) + 4)] = ff(ss[0]); \
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ss[1] ^= ss[0]; k[v(40, (4 * (i)) + 5)] = ff(ss[1]); \
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ss[2] ^= ss[1]; k[v(40, (4 * (i)) + 6)] = ff(ss[2]); \
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ss[3] ^= ss[2]; k[v(40, (4 * (i)) + 7)] = ff(ss[3]); \
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}
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#define kd4(k, i) \
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{ ss[4] = ls_box(ss[3], 3) ^ t_use(r, c)[i]; \
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ss[0] ^= ss[4]; \
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ss[4] = ff(ss[4]); \
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k[v(40, (4 * (i)) + 4)] = ss[4] ^= k[v(40, (4 * (i)))]; \
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ss[1] ^= ss[0]; \
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k[v(40, (4 * (i)) + 5)] = ss[4] ^= k[v(40, (4 * (i)) + 1)]; \
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ss[2] ^= ss[1]; \
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k[v(40, (4 * (i)) + 6)] = ss[4] ^= k[v(40, (4 * (i)) + 2)]; \
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ss[3] ^= ss[2]; \
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k[v(40, (4 * (i)) + 7)] = ss[4] ^= k[v(40, (4 * (i)) + 3)]; \
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}
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#define kdl4(k, i) \
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{ ss[0] ^= ls_box(ss[3], 3) ^ t_use(r, c)[i]; \
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k[v(40, (4 * (i)) + 4)] = ss[0]; \
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ss[1] ^= ss[0]; k[v(40, (4 * (i)) + 5)] = ss[1]; \
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ss[2] ^= ss[1]; k[v(40, (4 * (i)) + 6)] = ss[2]; \
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ss[3] ^= ss[2]; k[v(40, (4 * (i)) + 7)] = ss[3]; \
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}
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#endif
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static void
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aes_decrypt_key128(const unsigned char *key, uint32_t rk[])
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{
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uint32_t ss[5];
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#if defined(d_vars)
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d_vars;
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#endif
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rk[v(40, (0))] = ss[0] = word_in(key, 0);
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rk[v(40, (1))] = ss[1] = word_in(key, 1);
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rk[v(40, (2))] = ss[2] = word_in(key, 2);
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rk[v(40, (3))] = ss[3] = word_in(key, 3);
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#ifdef DEC_KS_UNROLL
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kdf4(rk, 0); kd4(rk, 1);
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kd4(rk, 2); kd4(rk, 3);
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kd4(rk, 4); kd4(rk, 5);
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kd4(rk, 6); kd4(rk, 7);
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kd4(rk, 8); kdl4(rk, 9);
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#else
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{
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uint32_t i;
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for (i = 0; i < 10; ++i)
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k4e(rk, i);
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#if !(DEC_ROUND == NO_TABLES)
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for (i = MAX_AES_NB; i < 10 * MAX_AES_NB; ++i)
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rk[i] = inv_mcol(rk[i]);
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#endif
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}
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#endif /* DEC_KS_UNROLL */
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}
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#define k6ef(k, i) \
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{ k[v(48, (6 * (i)) + 6)] = ss[0] ^= ls_box(ss[5], 3) ^ t_use(r, c)[i]; \
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k[v(48, (6 * (i)) + 7)] = ss[1] ^= ss[0]; \
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k[v(48, (6 * (i)) + 8)] = ss[2] ^= ss[1]; \
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k[v(48, (6 * (i)) + 9)] = ss[3] ^= ss[2]; \
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}
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#define k6e(k, i) \
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{ k6ef(k, i); \
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k[v(48, (6 * (i)) + 10)] = ss[4] ^= ss[3]; \
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k[v(48, (6 * (i)) + 11)] = ss[5] ^= ss[4]; \
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}
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#define kdf6(k, i) \
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{ ss[0] ^= ls_box(ss[5], 3) ^ t_use(r, c)[i]; \
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k[v(48, (6 * (i)) + 6)] = ff(ss[0]); \
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ss[1] ^= ss[0]; k[v(48, (6 * (i)) + 7)] = ff(ss[1]); \
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ss[2] ^= ss[1]; k[v(48, (6 * (i)) + 8)] = ff(ss[2]); \
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ss[3] ^= ss[2]; k[v(48, (6 * (i)) + 9)] = ff(ss[3]); \
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ss[4] ^= ss[3]; k[v(48, (6 * (i)) + 10)] = ff(ss[4]); \
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ss[5] ^= ss[4]; k[v(48, (6 * (i)) + 11)] = ff(ss[5]); \
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}
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#define kd6(k, i) \
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{ ss[6] = ls_box(ss[5], 3) ^ t_use(r, c)[i]; \
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ss[0] ^= ss[6]; ss[6] = ff(ss[6]); \
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k[v(48, (6 * (i)) + 6)] = ss[6] ^= k[v(48, (6 * (i)))]; \
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ss[1] ^= ss[0]; \
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k[v(48, (6 * (i)) + 7)] = ss[6] ^= k[v(48, (6 * (i)) + 1)]; \
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ss[2] ^= ss[1]; \
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k[v(48, (6 * (i)) + 8)] = ss[6] ^= k[v(48, (6 * (i)) + 2)]; \
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ss[3] ^= ss[2]; \
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k[v(48, (6 * (i)) + 9)] = ss[6] ^= k[v(48, (6 * (i)) + 3)]; \
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ss[4] ^= ss[3]; \
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k[v(48, (6 * (i)) + 10)] = ss[6] ^= k[v(48, (6 * (i)) + 4)]; \
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ss[5] ^= ss[4]; \
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k[v(48, (6 * (i)) + 11)] = ss[6] ^= k[v(48, (6 * (i)) + 5)]; \
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}
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#define kdl6(k, i) \
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{ ss[0] ^= ls_box(ss[5], 3) ^ t_use(r, c)[i]; \
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k[v(48, (6 * (i)) + 6)] = ss[0]; \
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ss[1] ^= ss[0]; k[v(48, (6 * (i)) + 7)] = ss[1]; \
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ss[2] ^= ss[1]; k[v(48, (6 * (i)) + 8)] = ss[2]; \
|
|
ss[3] ^= ss[2]; k[v(48, (6 * (i)) + 9)] = ss[3]; \
|
|
}
|
|
|
|
static void
|
|
aes_decrypt_key192(const unsigned char *key, uint32_t rk[])
|
|
{
|
|
uint32_t ss[7];
|
|
#if defined(d_vars)
|
|
d_vars;
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|
#endif
|
|
rk[v(48, (0))] = ss[0] = word_in(key, 0);
|
|
rk[v(48, (1))] = ss[1] = word_in(key, 1);
|
|
rk[v(48, (2))] = ss[2] = word_in(key, 2);
|
|
rk[v(48, (3))] = ss[3] = word_in(key, 3);
|
|
|
|
#ifdef DEC_KS_UNROLL
|
|
ss[4] = word_in(key, 4);
|
|
rk[v(48, (4))] = ff(ss[4]);
|
|
ss[5] = word_in(key, 5);
|
|
rk[v(48, (5))] = ff(ss[5]);
|
|
kdf6(rk, 0); kd6(rk, 1);
|
|
kd6(rk, 2); kd6(rk, 3);
|
|
kd6(rk, 4); kd6(rk, 5);
|
|
kd6(rk, 6); kdl6(rk, 7);
|
|
#else
|
|
rk[v(48, (4))] = ss[4] = word_in(key, 4);
|
|
rk[v(48, (5))] = ss[5] = word_in(key, 5);
|
|
{
|
|
uint32_t i;
|
|
|
|
for (i = 0; i < 7; ++i)
|
|
k6e(rk, i);
|
|
k6ef(rk, 7);
|
|
#if !(DEC_ROUND == NO_TABLES)
|
|
for (i = MAX_AES_NB; i < 12 * MAX_AES_NB; ++i)
|
|
rk[i] = inv_mcol(rk[i]);
|
|
#endif
|
|
}
|
|
#endif
|
|
}
|
|
|
|
|
|
|
|
#define k8ef(k, i) \
|
|
{ k[v(56, (8 * (i)) + 8)] = ss[0] ^= ls_box(ss[7], 3) ^ t_use(r, c)[i]; \
|
|
k[v(56, (8 * (i)) + 9)] = ss[1] ^= ss[0]; \
|
|
k[v(56, (8 * (i)) + 10)] = ss[2] ^= ss[1]; \
|
|
k[v(56, (8 * (i)) + 11)] = ss[3] ^= ss[2]; \
|
|
}
|
|
|
|
#define k8e(k, i) \
|
|
{ k8ef(k, i); \
|
|
k[v(56, (8 * (i)) + 12)] = ss[4] ^= ls_box(ss[3], 0); \
|
|
k[v(56, (8 * (i)) + 13)] = ss[5] ^= ss[4]; \
|
|
k[v(56, (8 * (i)) + 14)] = ss[6] ^= ss[5]; \
|
|
k[v(56, (8 * (i)) + 15)] = ss[7] ^= ss[6]; \
|
|
}
|
|
|
|
#define kdf8(k, i) \
|
|
{ ss[0] ^= ls_box(ss[7], 3) ^ t_use(r, c)[i]; \
|
|
k[v(56, (8 * (i)) + 8)] = ff(ss[0]); \
|
|
ss[1] ^= ss[0]; k[v(56, (8 * (i)) + 9)] = ff(ss[1]); \
|
|
ss[2] ^= ss[1]; k[v(56, (8 * (i)) + 10)] = ff(ss[2]); \
|
|
ss[3] ^= ss[2]; k[v(56, (8 * (i)) + 11)] = ff(ss[3]); \
|
|
ss[4] ^= ls_box(ss[3], 0); k[v(56, (8 * (i)) + 12)] = ff(ss[4]); \
|
|
ss[5] ^= ss[4]; k[v(56, (8 * (i)) + 13)] = ff(ss[5]); \
|
|
ss[6] ^= ss[5]; k[v(56, (8 * (i)) + 14)] = ff(ss[6]); \
|
|
ss[7] ^= ss[6]; k[v(56, (8 * (i)) + 15)] = ff(ss[7]); \
|
|
}
|
|
|
|
#define kd8(k, i) \
|
|
{ ss[8] = ls_box(ss[7], 3) ^ t_use(r, c)[i]; \
|
|
ss[0] ^= ss[8]; \
|
|
ss[8] = ff(ss[8]); \
|
|
k[v(56, (8 * (i)) + 8)] = ss[8] ^= k[v(56, (8 * (i)))]; \
|
|
ss[1] ^= ss[0]; \
|
|
k[v(56, (8 * (i)) + 9)] = ss[8] ^= k[v(56, (8 * (i)) + 1)]; \
|
|
ss[2] ^= ss[1]; \
|
|
k[v(56, (8 * (i)) + 10)] = ss[8] ^= k[v(56, (8 * (i)) + 2)]; \
|
|
ss[3] ^= ss[2]; \
|
|
k[v(56, (8 * (i)) + 11)] = ss[8] ^= k[v(56, (8 * (i)) + 3)]; \
|
|
ss[8] = ls_box(ss[3], 0); \
|
|
ss[4] ^= ss[8]; \
|
|
ss[8] = ff(ss[8]); \
|
|
k[v(56, (8 * (i)) + 12)] = ss[8] ^= k[v(56, (8 * (i)) + 4)]; \
|
|
ss[5] ^= ss[4]; \
|
|
k[v(56, (8 * (i)) + 13)] = ss[8] ^= k[v(56, (8 * (i)) + 5)]; \
|
|
ss[6] ^= ss[5]; \
|
|
k[v(56, (8 * (i)) + 14)] = ss[8] ^= k[v(56, (8 * (i)) + 6)]; \
|
|
ss[7] ^= ss[6]; \
|
|
k[v(56, (8 * (i)) + 15)] = ss[8] ^= k[v(56, (8 * (i)) + 7)]; \
|
|
}
|
|
|
|
#define kdl8(k, i) \
|
|
{ ss[0] ^= ls_box(ss[7], 3) ^ t_use(r, c)[i]; \
|
|
k[v(56, (8 * (i)) + 8)] = ss[0]; \
|
|
ss[1] ^= ss[0]; k[v(56, (8 * (i)) + 9)] = ss[1]; \
|
|
ss[2] ^= ss[1]; k[v(56, (8 * (i)) + 10)] = ss[2]; \
|
|
ss[3] ^= ss[2]; k[v(56, (8 * (i)) + 11)] = ss[3]; \
|
|
}
|
|
|
|
static void
|
|
aes_decrypt_key256(const unsigned char *key, uint32_t rk[])
|
|
{
|
|
uint32_t ss[9];
|
|
#if defined(d_vars)
|
|
d_vars;
|
|
#endif
|
|
rk[v(56, (0))] = ss[0] = word_in(key, 0);
|
|
rk[v(56, (1))] = ss[1] = word_in(key, 1);
|
|
rk[v(56, (2))] = ss[2] = word_in(key, 2);
|
|
rk[v(56, (3))] = ss[3] = word_in(key, 3);
|
|
|
|
#ifdef DEC_KS_UNROLL
|
|
ss[4] = word_in(key, 4);
|
|
rk[v(56, (4))] = ff(ss[4]);
|
|
ss[5] = word_in(key, 5);
|
|
rk[v(56, (5))] = ff(ss[5]);
|
|
ss[6] = word_in(key, 6);
|
|
rk[v(56, (6))] = ff(ss[6]);
|
|
ss[7] = word_in(key, 7);
|
|
rk[v(56, (7))] = ff(ss[7]);
|
|
kdf8(rk, 0); kd8(rk, 1);
|
|
kd8(rk, 2); kd8(rk, 3);
|
|
kd8(rk, 4); kd8(rk, 5);
|
|
kdl8(rk, 6);
|
|
#else
|
|
rk[v(56, (4))] = ss[4] = word_in(key, 4);
|
|
rk[v(56, (5))] = ss[5] = word_in(key, 5);
|
|
rk[v(56, (6))] = ss[6] = word_in(key, 6);
|
|
rk[v(56, (7))] = ss[7] = word_in(key, 7);
|
|
{
|
|
uint32_t i;
|
|
|
|
for (i = 0; i < 6; ++i)
|
|
k8e(rk, i);
|
|
k8ef(rk, 6);
|
|
#if !(DEC_ROUND == NO_TABLES)
|
|
for (i = MAX_AES_NB; i < 14 * MAX_AES_NB; ++i)
|
|
rk[i] = inv_mcol(rk[i]);
|
|
#endif
|
|
}
|
|
#endif /* DEC_KS_UNROLL */
|
|
}
|
|
|
|
|
|
/*
|
|
* Expand the cipher key into the decryption key schedule.
|
|
*
|
|
* Return the number of rounds for the given cipher key size.
|
|
* The size of the key schedule depends on the number of rounds
|
|
* (which can be computed from the size of the key), i.e. 4 * (Nr + 1).
|
|
*
|
|
* Parameters:
|
|
* rk AES key schedule 32-bit array to be initialized
|
|
* cipherKey User key
|
|
* keyBits AES key size (128, 192, or 256 bits)
|
|
*/
|
|
int
|
|
rijndael_key_setup_dec_amd64(uint32_t rk[], const uint32_t cipherKey[],
|
|
int keyBits)
|
|
{
|
|
switch (keyBits) {
|
|
case 128:
|
|
aes_decrypt_key128((unsigned char *)&cipherKey[0], rk);
|
|
return (10);
|
|
case 192:
|
|
aes_decrypt_key192((unsigned char *)&cipherKey[0], rk);
|
|
return (12);
|
|
case 256:
|
|
aes_decrypt_key256((unsigned char *)&cipherKey[0], rk);
|
|
return (14);
|
|
default: /* should never get here */
|
|
break;
|
|
}
|
|
|
|
return (0);
|
|
}
|