587 lines
16 KiB
C
587 lines
16 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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LICENSE TERMS
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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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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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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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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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DISCLAIMER
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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 "Aesopt.h"
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#include "Aestab.h"
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#include "Common/Tcdefs.h"
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#ifdef USE_VIA_ACE_IF_PRESENT
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# include "aes_via_ace.h"
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#endif
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#if defined(__cplusplus)
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extern "C"
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{
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#endif
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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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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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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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#if (FUNCS_IN_C & ENC_KEYING_IN_C)
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#if defined(AES_128) || defined(AES_VAR)
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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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AES_RETURN aes_encrypt_key128(const unsigned char *key, aes_encrypt_ctx cx[1])
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{ uint_32t ss[4];
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cx->ks[0] = ss[0] = word_in(key, 0);
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cx->ks[1] = ss[1] = word_in(key, 1);
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cx->ks[2] = ss[2] = word_in(key, 2);
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cx->ks[3] = ss[3] = word_in(key, 3);
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#if ENC_UNROLL == NONE
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{ uint_32t i;
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for(i = 0; i < 9; ++i)
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ke4(cx->ks, i);
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}
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#else
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ke4(cx->ks, 0); ke4(cx->ks, 1);
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ke4(cx->ks, 2); ke4(cx->ks, 3);
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ke4(cx->ks, 4); ke4(cx->ks, 5);
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ke4(cx->ks, 6); ke4(cx->ks, 7);
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ke4(cx->ks, 8);
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#endif
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ke4(cx->ks, 9);
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cx->inf.l = 0;
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cx->inf.b[0] = 10 * 16;
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#ifdef USE_VIA_ACE_IF_PRESENT
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if(VIA_ACE_AVAILABLE)
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cx->inf.b[1] = 0xff;
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#endif
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burn(ss, sizeof(ss));
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#if defined( AES_ERR_CHK )
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return EXIT_SUCCESS;
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#endif
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}
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#endif
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#if defined(AES_192) || defined(AES_VAR)
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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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AES_RETURN aes_encrypt_key192(const unsigned char *key, aes_encrypt_ctx cx[1])
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{ uint_32t ss[6];
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cx->ks[0] = ss[0] = word_in(key, 0);
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cx->ks[1] = ss[1] = word_in(key, 1);
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cx->ks[2] = ss[2] = word_in(key, 2);
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cx->ks[3] = ss[3] = word_in(key, 3);
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cx->ks[4] = ss[4] = word_in(key, 4);
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cx->ks[5] = ss[5] = word_in(key, 5);
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#if ENC_UNROLL == NONE
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{ uint_32t i;
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for(i = 0; i < 7; ++i)
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ke6(cx->ks, i);
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}
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#else
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ke6(cx->ks, 0); ke6(cx->ks, 1);
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ke6(cx->ks, 2); ke6(cx->ks, 3);
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ke6(cx->ks, 4); ke6(cx->ks, 5);
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ke6(cx->ks, 6);
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#endif
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kef6(cx->ks, 7);
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cx->inf.l = 0;
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cx->inf.b[0] = 12 * 16;
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#ifdef USE_VIA_ACE_IF_PRESENT
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if(VIA_ACE_AVAILABLE)
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cx->inf.b[1] = 0xff;
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#endif
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burn(ss, sizeof(ss));
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#if defined( AES_ERR_CHK )
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return EXIT_SUCCESS;
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#endif
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}
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#endif
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#if defined(AES_256) || defined(AES_VAR)
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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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AES_RETURN aes_encrypt_key256(const unsigned char *key, aes_encrypt_ctx cx[1])
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{ uint_32t ss[8];
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cx->ks[0] = ss[0] = word_in(key, 0);
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cx->ks[1] = ss[1] = word_in(key, 1);
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cx->ks[2] = ss[2] = word_in(key, 2);
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cx->ks[3] = ss[3] = word_in(key, 3);
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cx->ks[4] = ss[4] = word_in(key, 4);
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cx->ks[5] = ss[5] = word_in(key, 5);
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cx->ks[6] = ss[6] = word_in(key, 6);
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cx->ks[7] = ss[7] = word_in(key, 7);
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#if ENC_UNROLL == NONE
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{ uint_32t i;
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for(i = 0; i < 6; ++i)
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ke8(cx->ks, i);
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}
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#else
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ke8(cx->ks, 0); ke8(cx->ks, 1);
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ke8(cx->ks, 2); ke8(cx->ks, 3);
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ke8(cx->ks, 4); ke8(cx->ks, 5);
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#endif
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kef8(cx->ks, 6);
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cx->inf.l = 0;
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cx->inf.b[0] = 14 * 16;
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#ifdef USE_VIA_ACE_IF_PRESENT
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if(VIA_ACE_AVAILABLE)
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cx->inf.b[1] = 0xff;
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#endif
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burn(ss, sizeof(ss));
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#if defined( AES_ERR_CHK )
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return EXIT_SUCCESS;
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#endif
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}
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#endif
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#if defined(AES_VAR)
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AES_RETURN aes_encrypt_key(const unsigned char *key, int key_len, aes_encrypt_ctx cx[1])
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{
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switch(key_len)
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{
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#if defined( AES_ERR_CHK )
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case 16: case 128: return aes_encrypt_key128(key, cx);
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case 24: case 192: return aes_encrypt_key192(key, cx);
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case 32: case 256: return aes_encrypt_key256(key, cx);
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default: return EXIT_FAILURE;
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#else
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case 16: case 128: aes_encrypt_key128(key, cx); return;
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case 24: case 192: aes_encrypt_key192(key, cx); return;
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case 32: case 256: aes_encrypt_key256(key, cx); return;
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#endif
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}
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}
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#endif
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#endif
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#if (FUNCS_IN_C & DEC_KEYING_IN_C)
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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
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#if defined(AES_128) || defined(AES_VAR)
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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]; 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]; 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]; ss[4] = ff(ss[4]); k[v(40,(4*(i))+ 4)] = ss[4] ^= k[v(40,(4*(i)))]; \
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ss[1] ^= ss[0]; k[v(40,(4*(i))+ 5)] = ss[4] ^= k[v(40,(4*(i))+ 1)]; \
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ss[2] ^= ss[1]; k[v(40,(4*(i))+ 6)] = ss[4] ^= k[v(40,(4*(i))+ 2)]; \
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ss[3] ^= ss[2]; 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]; 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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AES_RETURN aes_decrypt_key128(const unsigned char *key, aes_decrypt_ctx cx[1])
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{ uint_32t 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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cx->ks[v(40,(0))] = ss[0] = word_in(key, 0);
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cx->ks[v(40,(1))] = ss[1] = word_in(key, 1);
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cx->ks[v(40,(2))] = ss[2] = word_in(key, 2);
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cx->ks[v(40,(3))] = ss[3] = word_in(key, 3);
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#if DEC_UNROLL == NONE
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{ uint_32t i;
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for(i = 0; i < 10; ++i)
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k4e(cx->ks, i);
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#if !(DEC_ROUND == NO_TABLES)
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for(i = N_COLS; i < 10 * N_COLS; ++i)
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cx->ks[i] = inv_mcol(cx->ks[i]);
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#endif
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}
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#else
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kdf4(cx->ks, 0); kd4(cx->ks, 1);
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kd4(cx->ks, 2); kd4(cx->ks, 3);
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kd4(cx->ks, 4); kd4(cx->ks, 5);
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kd4(cx->ks, 6); kd4(cx->ks, 7);
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kd4(cx->ks, 8); kdl4(cx->ks, 9);
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#endif
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cx->inf.l = 0;
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cx->inf.b[0] = 10 * 16;
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#ifdef USE_VIA_ACE_IF_PRESENT
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if(VIA_ACE_AVAILABLE)
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cx->inf.b[1] = 0xff;
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#endif
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burn(ss, sizeof(ss));
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#if defined( AES_ERR_CHK )
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return EXIT_SUCCESS;
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#endif
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}
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#endif
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#if defined(AES_192) || defined(AES_VAR)
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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]; 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]); k[v(48,(6*(i))+ 6)] = ss[6] ^= k[v(48,(6*(i)))]; \
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ss[1] ^= ss[0]; k[v(48,(6*(i))+ 7)] = ss[6] ^= k[v(48,(6*(i))+ 1)]; \
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ss[2] ^= ss[1]; k[v(48,(6*(i))+ 8)] = ss[6] ^= k[v(48,(6*(i))+ 2)]; \
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ss[3] ^= ss[2]; k[v(48,(6*(i))+ 9)] = ss[6] ^= k[v(48,(6*(i))+ 3)]; \
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ss[4] ^= ss[3]; k[v(48,(6*(i))+10)] = ss[6] ^= k[v(48,(6*(i))+ 4)]; \
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ss[5] ^= ss[4]; 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]; 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]; \
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ss[3] ^= ss[2]; k[v(48,(6*(i))+ 9)] = ss[3]; \
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}
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AES_RETURN aes_decrypt_key192(const unsigned char *key, aes_decrypt_ctx cx[1])
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{ uint_32t ss[7];
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#if defined( d_vars )
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d_vars;
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#endif
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cx->ks[v(48,(0))] = ss[0] = word_in(key, 0);
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cx->ks[v(48,(1))] = ss[1] = word_in(key, 1);
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cx->ks[v(48,(2))] = ss[2] = word_in(key, 2);
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cx->ks[v(48,(3))] = ss[3] = word_in(key, 3);
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|
|
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#if DEC_UNROLL == NONE
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cx->ks[v(48,(4))] = ss[4] = word_in(key, 4);
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cx->ks[v(48,(5))] = ss[5] = word_in(key, 5);
|
|
{ uint_32t i;
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|
|
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for(i = 0; i < 7; ++i)
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|
k6e(cx->ks, i);
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|
k6ef(cx->ks, 7);
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|
#if !(DEC_ROUND == NO_TABLES)
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|
for(i = N_COLS; i < 12 * N_COLS; ++i)
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|
cx->ks[i] = inv_mcol(cx->ks[i]);
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#endif
|
|
}
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#else
|
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cx->ks[v(48,(4))] = ff(ss[4] = word_in(key, 4));
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|
cx->ks[v(48,(5))] = ff(ss[5] = word_in(key, 5));
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|
kdf6(cx->ks, 0); kd6(cx->ks, 1);
|
|
kd6(cx->ks, 2); kd6(cx->ks, 3);
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|
kd6(cx->ks, 4); kd6(cx->ks, 5);
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|
kd6(cx->ks, 6); kdl6(cx->ks, 7);
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|
#endif
|
|
cx->inf.l = 0;
|
|
cx->inf.b[0] = 12 * 16;
|
|
|
|
#ifdef USE_VIA_ACE_IF_PRESENT
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|
if(VIA_ACE_AVAILABLE)
|
|
cx->inf.b[1] = 0xff;
|
|
#endif
|
|
|
|
burn(ss, sizeof(ss));
|
|
|
|
#if defined( AES_ERR_CHK )
|
|
return EXIT_SUCCESS;
|
|
#endif
|
|
}
|
|
|
|
#endif
|
|
|
|
#if defined(AES_256) || defined(AES_VAR)
|
|
|
|
#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]; \
|
|
}
|
|
|
|
AES_RETURN aes_decrypt_key256(const unsigned char *key, aes_decrypt_ctx cx[1])
|
|
{ uint_32t ss[9];
|
|
#if defined( d_vars )
|
|
d_vars;
|
|
#endif
|
|
cx->ks[v(56,(0))] = ss[0] = word_in(key, 0);
|
|
cx->ks[v(56,(1))] = ss[1] = word_in(key, 1);
|
|
cx->ks[v(56,(2))] = ss[2] = word_in(key, 2);
|
|
cx->ks[v(56,(3))] = ss[3] = word_in(key, 3);
|
|
|
|
#if DEC_UNROLL == NONE
|
|
cx->ks[v(56,(4))] = ss[4] = word_in(key, 4);
|
|
cx->ks[v(56,(5))] = ss[5] = word_in(key, 5);
|
|
cx->ks[v(56,(6))] = ss[6] = word_in(key, 6);
|
|
cx->ks[v(56,(7))] = ss[7] = word_in(key, 7);
|
|
{ uint_32t i;
|
|
|
|
for(i = 0; i < 6; ++i)
|
|
k8e(cx->ks, i);
|
|
k8ef(cx->ks, 6);
|
|
#if !(DEC_ROUND == NO_TABLES)
|
|
for(i = N_COLS; i < 14 * N_COLS; ++i)
|
|
cx->ks[i] = inv_mcol(cx->ks[i]);
|
|
|
|
#endif
|
|
}
|
|
#else
|
|
ss[4] = word_in(key, 4); cx->ks[v(56,(4))] = ff(ss[4]);
|
|
ss[5] = word_in(key, 5); cx->ks[v(56,(5))] = ff(ss[5]);
|
|
ss[6] = word_in(key, 6); cx->ks[v(56,(6))] = ff(ss[6]);
|
|
ss[7] = word_in(key, 7); cx->ks[v(56,(7))] = ff(ss[7]);
|
|
kdf8(cx->ks, 0); kd8(cx->ks, 1);
|
|
kd8(cx->ks, 2); kd8(cx->ks, 3);
|
|
kd8(cx->ks, 4); kd8(cx->ks, 5);
|
|
kdl8(cx->ks, 6);
|
|
#endif
|
|
cx->inf.l = 0;
|
|
cx->inf.b[0] = 14 * 16;
|
|
|
|
#ifdef USE_VIA_ACE_IF_PRESENT
|
|
if(VIA_ACE_AVAILABLE)
|
|
cx->inf.b[1] = 0xff;
|
|
#endif
|
|
|
|
burn(ss, sizeof(ss));
|
|
|
|
#if defined( AES_ERR_CHK )
|
|
return EXIT_SUCCESS;
|
|
#endif
|
|
}
|
|
|
|
#endif
|
|
|
|
#if defined(AES_VAR)
|
|
|
|
AES_RETURN aes_decrypt_key(const unsigned char *key, int key_len, aes_decrypt_ctx cx[1])
|
|
{
|
|
switch(key_len)
|
|
{
|
|
#if defined( AES_ERR_CHK )
|
|
case 16: case 128: return aes_decrypt_key128(key, cx);
|
|
case 24: case 192: return aes_decrypt_key192(key, cx);
|
|
case 32: case 256: return aes_decrypt_key256(key, cx);
|
|
default: return EXIT_FAILURE;
|
|
#else
|
|
case 16: case 128: aes_decrypt_key128(key, cx); return;
|
|
case 24: case 192: aes_decrypt_key192(key, cx); return;
|
|
case 32: case 256: aes_decrypt_key256(key, cx); return;
|
|
#endif
|
|
}
|
|
}
|
|
|
|
#endif
|
|
|
|
#endif
|
|
|
|
#if defined(__cplusplus)
|
|
}
|
|
#endif
|