| /* |
| * (C) Copyright 2011 |
| * NVIDIA Corporation <www.nvidia.com> |
| * |
| * See file CREDITS for list of people who contributed to this |
| * project. |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License as |
| * published by the Free Software Foundation; either version 2 of |
| * the License, or (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 59 Temple Place, Suite 330, Boston, |
| * MA 02111-1307 USA |
| */ |
| |
| /* advanced encryption standard |
| * author: karl malbrain, malbrain@yahoo.com |
| */ |
| |
| /* |
| This work, including the source code, documentation |
| and related data, is placed into the public domain. |
| |
| The orginal author is Karl Malbrain. |
| |
| THIS SOFTWARE IS PROVIDED AS-IS WITHOUT WARRANTY |
| OF ANY KIND, NOT EVEN THE IMPLIED WARRANTY OF |
| MERCHANTABILITY. THE AUTHOR OF THIS SOFTWARE, |
| ASSUMES _NO_ RESPONSIBILITY FOR ANY CONSEQUENCE |
| RESULTING FROM THE USE, MODIFICATION, OR |
| REDISTRIBUTION OF THIS SOFTWARE. |
| */ |
| |
| /* |
| * Modifications by NVIDIA: |
| * - Created nvaes_ref.h header. |
| * - Replaced type definitions with NVIDIA standard types. |
| * - Removed unneeded code that turns this source file into an executable. |
| * - Created function prototypes for some of the functions. |
| * - Reformatted the code to conform to coding conventions. |
| */ |
| |
| #include "nvaes_ref.h" |
| |
| static void shift_rows(u_int8_t *state); |
| static void mix_sub_columns(u_int8_t *state); |
| static void add_round_key(u_int32_t *state, u_int32_t *key); |
| |
| static u_int8_t s_Sbox[256] = |
| { /* forward s-box */ |
| 0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5, |
| 0x30, 0x01, 0x67, 0x2b, 0xfe, 0xd7, 0xab, 0x76, |
| 0xca, 0x82, 0xc9, 0x7d, 0xfa, 0x59, 0x47, 0xf0, |
| 0xad, 0xd4, 0xa2, 0xaf, 0x9c, 0xa4, 0x72, 0xc0, |
| 0xb7, 0xfd, 0x93, 0x26, 0x36, 0x3f, 0xf7, 0xcc, |
| 0x34, 0xa5, 0xe5, 0xf1, 0x71, 0xd8, 0x31, 0x15, |
| 0x04, 0xc7, 0x23, 0xc3, 0x18, 0x96, 0x05, 0x9a, |
| 0x07, 0x12, 0x80, 0xe2, 0xeb, 0x27, 0xb2, 0x75, |
| 0x09, 0x83, 0x2c, 0x1a, 0x1b, 0x6e, 0x5a, 0xa0, |
| 0x52, 0x3b, 0xd6, 0xb3, 0x29, 0xe3, 0x2f, 0x84, |
| 0x53, 0xd1, 0x00, 0xed, 0x20, 0xfc, 0xb1, 0x5b, |
| 0x6a, 0xcb, 0xbe, 0x39, 0x4a, 0x4c, 0x58, 0xcf, |
| 0xd0, 0xef, 0xaa, 0xfb, 0x43, 0x4d, 0x33, 0x85, |
| 0x45, 0xf9, 0x02, 0x7f, 0x50, 0x3c, 0x9f, 0xa8, |
| 0x51, 0xa3, 0x40, 0x8f, 0x92, 0x9d, 0x38, 0xf5, |
| 0xbc, 0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3, 0xd2, |
| 0xcd, 0x0c, 0x13, 0xec, 0x5f, 0x97, 0x44, 0x17, |
| 0xc4, 0xa7, 0x7e, 0x3d, 0x64, 0x5d, 0x19, 0x73, |
| 0x60, 0x81, 0x4f, 0xdc, 0x22, 0x2a, 0x90, 0x88, |
| 0x46, 0xee, 0xb8, 0x14, 0xde, 0x5e, 0x0b, 0xdb, |
| 0xe0, 0x32, 0x3a, 0x0a, 0x49, 0x06, 0x24, 0x5c, |
| 0xc2, 0xd3, 0xac, 0x62, 0x91, 0x95, 0xe4, 0x79, |
| 0xe7, 0xc8, 0x37, 0x6d, 0x8d, 0xd5, 0x4e, 0xa9, |
| 0x6c, 0x56, 0xf4, 0xea, 0x65, 0x7a, 0xae, 0x08, |
| 0xba, 0x78, 0x25, 0x2e, 0x1c, 0xa6, 0xb4, 0xc6, |
| 0xe8, 0xdd, 0x74, 0x1f, 0x4b, 0xbd, 0x8b, 0x8a, |
| 0x70, 0x3e, 0xb5, 0x66, 0x48, 0x03, 0xf6, 0x0e, |
| 0x61, 0x35, 0x57, 0xb9, 0x86, 0xc1, 0x1d, 0x9e, |
| 0xe1, 0xf8, 0x98, 0x11, 0x69, 0xd9, 0x8e, 0x94, |
| 0x9b, 0x1e, 0x87, 0xe9, 0xce, 0x55, 0x28, 0xdf, |
| 0x8c, 0xa1, 0x89, 0x0d, 0xbf, 0xe6, 0x42, 0x68, |
| 0x41, 0x99, 0x2d, 0x0f, 0xb0, 0x54, 0xbb, 0x16 |
| }; |
| |
| /* combined Xtimes2[Sbox[]] */ |
| static u_int8_t s_Xtime2Sbox[256] = |
| { |
| 0xc6, 0xf8, 0xee, 0xf6, 0xff, 0xd6, 0xde, 0x91, |
| 0x60, 0x02, 0xce, 0x56, 0xe7, 0xb5, 0x4d, 0xec, |
| 0x8f, 0x1f, 0x89, 0xfa, 0xef, 0xb2, 0x8e, 0xfb, |
| 0x41, 0xb3, 0x5f, 0x45, 0x23, 0x53, 0xe4, 0x9b, |
| 0x75, 0xe1, 0x3d, 0x4c, 0x6c, 0x7e, 0xf5, 0x83, |
| 0x68, 0x51, 0xd1, 0xf9, 0xe2, 0xab, 0x62, 0x2a, |
| 0x08, 0x95, 0x46, 0x9d, 0x30, 0x37, 0x0a, 0x2f, |
| 0x0e, 0x24, 0x1b, 0xdf, 0xcd, 0x4e, 0x7f, 0xea, |
| 0x12, 0x1d, 0x58, 0x34, 0x36, 0xdc, 0xb4, 0x5b, |
| 0xa4, 0x76, 0xb7, 0x7d, 0x52, 0xdd, 0x5e, 0x13, |
| 0xa6, 0xb9, 0x00, 0xc1, 0x40, 0xe3, 0x79, 0xb6, |
| 0xd4, 0x8d, 0x67, 0x72, 0x94, 0x98, 0xb0, 0x85, |
| 0xbb, 0xc5, 0x4f, 0xed, 0x86, 0x9a, 0x66, 0x11, |
| 0x8a, 0xe9, 0x04, 0xfe, 0xa0, 0x78, 0x25, 0x4b, |
| 0xa2, 0x5d, 0x80, 0x05, 0x3f, 0x21, 0x70, 0xf1, |
| 0x63, 0x77, 0xaf, 0x42, 0x20, 0xe5, 0xfd, 0xbf, |
| 0x81, 0x18, 0x26, 0xc3, 0xbe, 0x35, 0x88, 0x2e, |
| 0x93, 0x55, 0xfc, 0x7a, 0xc8, 0xba, 0x32, 0xe6, |
| 0xc0, 0x19, 0x9e, 0xa3, 0x44, 0x54, 0x3b, 0x0b, |
| 0x8c, 0xc7, 0x6b, 0x28, 0xa7, 0xbc, 0x16, 0xad, |
| 0xdb, 0x64, 0x74, 0x14, 0x92, 0x0c, 0x48, 0xb8, |
| 0x9f, 0xbd, 0x43, 0xc4, 0x39, 0x31, 0xd3, 0xf2, |
| 0xd5, 0x8b, 0x6e, 0xda, 0x01, 0xb1, 0x9c, 0x49, |
| 0xd8, 0xac, 0xf3, 0xcf, 0xca, 0xf4, 0x47, 0x10, |
| 0x6f, 0xf0, 0x4a, 0x5c, 0x38, 0x57, 0x73, 0x97, |
| 0xcb, 0xa1, 0xe8, 0x3e, 0x96, 0x61, 0x0d, 0x0f, |
| 0xe0, 0x7c, 0x71, 0xcc, 0x90, 0x06, 0xf7, 0x1c, |
| 0xc2, 0x6a, 0xae, 0x69, 0x17, 0x99, 0x3a, 0x27, |
| 0xd9, 0xeb, 0x2b, 0x22, 0xd2, 0xa9, 0x07, 0x33, |
| 0x2d, 0x3c, 0x15, 0xc9, 0x87, 0xaa, 0x50, 0xa5, |
| 0x03, 0x59, 0x09, 0x1a, 0x65, 0xd7, 0x84, 0xd0, |
| 0x82, 0x29, 0x5a, 0x1e, 0x7b, 0xa8, 0x6d, 0x2c |
| }; |
| |
| /* combined Xtimes3[Sbox[]] */ |
| static u_int8_t s_Xtime3Sbox[256] = |
| { |
| 0xa5, 0x84, 0x99, 0x8d, 0x0d, 0xbd, 0xb1, 0x54, |
| 0x50, 0x03, 0xa9, 0x7d, 0x19, 0x62, 0xe6, 0x9a, |
| 0x45, 0x9d, 0x40, 0x87, 0x15, 0xeb, 0xc9, 0x0b, |
| 0xec, 0x67, 0xfd, 0xea, 0xbf, 0xf7, 0x96, 0x5b, |
| 0xc2, 0x1c, 0xae, 0x6a, 0x5a, 0x41, 0x02, 0x4f, |
| 0x5c, 0xf4, 0x34, 0x08, 0x93, 0x73, 0x53, 0x3f, |
| 0x0c, 0x52, 0x65, 0x5e, 0x28, 0xa1, 0x0f, 0xb5, |
| 0x09, 0x36, 0x9b, 0x3d, 0x26, 0x69, 0xcd, 0x9f, |
| 0x1b, 0x9e, 0x74, 0x2e, 0x2d, 0xb2, 0xee, 0xfb, |
| 0xf6, 0x4d, 0x61, 0xce, 0x7b, 0x3e, 0x71, 0x97, |
| 0xf5, 0x68, 0x00, 0x2c, 0x60, 0x1f, 0xc8, 0xed, |
| 0xbe, 0x46, 0xd9, 0x4b, 0xde, 0xd4, 0xe8, 0x4a, |
| 0x6b, 0x2a, 0xe5, 0x16, 0xc5, 0xd7, 0x55, 0x94, |
| 0xcf, 0x10, 0x06, 0x81, 0xf0, 0x44, 0xba, 0xe3, |
| 0xf3, 0xfe, 0xc0, 0x8a, 0xad, 0xbc, 0x48, 0x04, |
| 0xdf, 0xc1, 0x75, 0x63, 0x30, 0x1a, 0x0e, 0x6d, |
| 0x4c, 0x14, 0x35, 0x2f, 0xe1, 0xa2, 0xcc, 0x39, |
| 0x57, 0xf2, 0x82, 0x47, 0xac, 0xe7, 0x2b, 0x95, |
| 0xa0, 0x98, 0xd1, 0x7f, 0x66, 0x7e, 0xab, 0x83, |
| 0xca, 0x29, 0xd3, 0x3c, 0x79, 0xe2, 0x1d, 0x76, |
| 0x3b, 0x56, 0x4e, 0x1e, 0xdb, 0x0a, 0x6c, 0xe4, |
| 0x5d, 0x6e, 0xef, 0xa6, 0xa8, 0xa4, 0x37, 0x8b, |
| 0x32, 0x43, 0x59, 0xb7, 0x8c, 0x64, 0xd2, 0xe0, |
| 0xb4, 0xfa, 0x07, 0x25, 0xaf, 0x8e, 0xe9, 0x18, |
| 0xd5, 0x88, 0x6f, 0x72, 0x24, 0xf1, 0xc7, 0x51, |
| 0x23, 0x7c, 0x9c, 0x21, 0xdd, 0xdc, 0x86, 0x85, |
| 0x90, 0x42, 0xc4, 0xaa, 0xd8, 0x05, 0x01, 0x12, |
| 0xa3, 0x5f, 0xf9, 0xd0, 0x91, 0x58, 0x27, 0xb9, |
| 0x38, 0x13, 0xb3, 0x33, 0xbb, 0x70, 0x89, 0xa7, |
| 0xb6, 0x22, 0x92, 0x20, 0x49, 0xff, 0x78, 0x7a, |
| 0x8f, 0xf8, 0x80, 0x17, 0xda, 0x31, 0xc6, 0xb8, |
| 0xc3, 0xb0, 0x77, 0x11, 0xcb, 0xfc, 0xd6, 0x3a |
| }; |
| |
| /* exchanges columns in each of 4 rows |
| * row0 - unchanged, row1- shifted left 1, |
| * row2 - shifted left 2 and row3 - shifted left 3 |
| */ |
| static void |
| shift_rows(u_int8_t *state) |
| { |
| u_int8_t tmp; |
| |
| /* just substitute row 0 */ |
| state[ 0] = s_Sbox[state[ 0]]; |
| state[ 4] = s_Sbox[state[ 4]]; |
| state[ 8] = s_Sbox[state[ 8]]; |
| state[12] = s_Sbox[state[12]]; |
| |
| /* rotate row 1 */ |
| tmp = s_Sbox[state[ 1]]; |
| state[ 1] = s_Sbox[state[ 5]]; |
| state[ 5] = s_Sbox[state[ 9]]; |
| state[ 9] = s_Sbox[state[13]]; |
| state[13] = tmp; |
| |
| /* rotate row 2 */ |
| tmp = s_Sbox[state[ 2]]; |
| state[ 2] = s_Sbox[state[10]]; |
| state[10] = tmp; |
| tmp = s_Sbox[state[ 6]]; |
| state[ 6] = s_Sbox[state[14]]; |
| state[14] = tmp; |
| |
| /* rotate row 3 */ |
| tmp = s_Sbox[state[15]]; |
| state[15] = s_Sbox[state[11]]; |
| state[11] = s_Sbox[state[ 7]]; |
| state[ 7] = s_Sbox[state[ 3]]; |
| state[ 3] = tmp; |
| } |
| |
| /* recombine and mix each row in a column */ |
| static void |
| mix_sub_columns(u_int8_t *state) |
| { |
| u_int8_t tmp[4 * NVAES_STATECOLS]; |
| |
| /* mixing column 0 */ |
| tmp[ 0] = s_Xtime2Sbox[state[ 0]] ^ s_Xtime3Sbox[state[ 5]] ^ |
| s_Sbox[state[10]] ^ s_Sbox[state[15]]; |
| tmp[ 1] = s_Sbox[state[ 0]] ^ s_Xtime2Sbox[state[ 5]] ^ |
| s_Xtime3Sbox[state[10]] ^ s_Sbox[state[15]]; |
| tmp[ 2] = s_Sbox[state[ 0]] ^ s_Sbox[state[ 5]] ^ |
| s_Xtime2Sbox[state[10]] ^ s_Xtime3Sbox[state[15]]; |
| tmp[ 3] = s_Xtime3Sbox[state[ 0]] ^ s_Sbox[state[ 5]] ^ |
| s_Sbox[state[10]] ^ s_Xtime2Sbox[state[15]]; |
| |
| /* mixing column 1 */ |
| tmp[ 4] = s_Xtime2Sbox[state[ 4]] ^ s_Xtime3Sbox[state[ 9]] ^ |
| s_Sbox[state[14]] ^ s_Sbox[state[ 3]]; |
| tmp[ 5] = s_Sbox[state[ 4]] ^ s_Xtime2Sbox[state[ 9]] ^ |
| s_Xtime3Sbox[state[14]] ^ s_Sbox[state[ 3]]; |
| tmp[ 6] = s_Sbox[state[ 4]] ^ s_Sbox[state[ 9]] ^ |
| s_Xtime2Sbox[state[14]] ^ s_Xtime3Sbox[state[ 3]]; |
| tmp[ 7] = s_Xtime3Sbox[state[ 4]] ^ s_Sbox[state[ 9]] ^ |
| s_Sbox[state[14]] ^ s_Xtime2Sbox[state[ 3]]; |
| |
| /* mixing column 2 */ |
| tmp[ 8] = s_Xtime2Sbox[state[ 8]] ^ s_Xtime3Sbox[state[13]] ^ |
| s_Sbox[state[ 2]] ^ s_Sbox[state[ 7]]; |
| tmp[ 9] = s_Sbox[state[ 8]] ^ s_Xtime2Sbox[state[13]] ^ |
| s_Xtime3Sbox[state[ 2]] ^ s_Sbox[state[ 7]]; |
| tmp[10] = s_Sbox[state[ 8]] ^ s_Sbox[state[13]] ^ |
| s_Xtime2Sbox[state[ 2]] ^ s_Xtime3Sbox[state[ 7]]; |
| tmp[11] = s_Xtime3Sbox[state[ 8]] ^ s_Sbox[state[13]] ^ |
| s_Sbox[state[ 2]] ^ s_Xtime2Sbox[state[ 7]]; |
| |
| /* mixing column 3 */ |
| tmp[12] = s_Xtime2Sbox[state[12]] ^ s_Xtime3Sbox[state[ 1]] ^ |
| s_Sbox[state[ 6]] ^ s_Sbox[state[11]]; |
| tmp[13] = s_Sbox[state[12]] ^ s_Xtime2Sbox[state[ 1]] ^ |
| s_Xtime3Sbox[state[ 6]] ^ s_Sbox[state[11]]; |
| tmp[14] = s_Sbox[state[12]] ^ s_Sbox[state[ 1]] ^ |
| s_Xtime2Sbox[state[ 6]] ^ s_Xtime3Sbox[state[11]]; |
| tmp[15] = s_Xtime3Sbox[state[12]] ^ s_Sbox[state[ 1]] ^ |
| s_Sbox[state[ 6]] ^ s_Xtime2Sbox[state[11]]; |
| |
| memcpy (state, tmp, sizeof(tmp)); |
| } |
| |
| /* encrypt/decrypt columns of the key |
| * n.b. you can replace this with |
| * byte-wise xor if you wish. |
| */ |
| |
| static void |
| add_round_key(u_int32_t *state, u_int32_t *key) |
| { |
| int idx; |
| |
| for (idx = 0; idx < 4; idx++) |
| state[idx] ^= key[idx]; |
| } |
| |
| static u_int8_t s_Rcon[11] = |
| { |
| 0x00, 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36 |
| }; |
| |
| /* produce NVAES_STATECOLS bytes for each round */ |
| void |
| nv_aes_expand_key(u_int8_t *key, u_int8_t *expkey) |
| { |
| u_int8_t tmp0, tmp1, tmp2, tmp3, tmp4; |
| u_int32_t idx; |
| |
| memcpy(expkey, key, NVAES_KEYCOLS * 4); |
| |
| for (idx = NVAES_KEYCOLS; |
| idx < NVAES_STATECOLS * (NVAES_ROUNDS + 1); |
| idx++) { |
| tmp0 = expkey[4*idx - 4]; |
| tmp1 = expkey[4*idx - 3]; |
| tmp2 = expkey[4*idx - 2]; |
| tmp3 = expkey[4*idx - 1]; |
| if (!(idx % NVAES_KEYCOLS)) { |
| tmp4 = tmp3; |
| tmp3 = s_Sbox[tmp0]; |
| tmp0 = s_Sbox[tmp1] ^ s_Rcon[idx/NVAES_KEYCOLS]; |
| tmp1 = s_Sbox[tmp2]; |
| tmp2 = s_Sbox[tmp4]; |
| } else if (NVAES_KEYCOLS > 6 && idx % NVAES_KEYCOLS == 4 ) { |
| tmp0 = s_Sbox[tmp0]; |
| tmp1 = s_Sbox[tmp1]; |
| tmp2 = s_Sbox[tmp2]; |
| tmp3 = s_Sbox[tmp3]; |
| } |
| |
| expkey[4*idx+0] = expkey[4*idx - 4*NVAES_KEYCOLS + 0] ^ tmp0; |
| expkey[4*idx+1] = expkey[4*idx - 4*NVAES_KEYCOLS + 1] ^ tmp1; |
| expkey[4*idx+2] = expkey[4*idx - 4*NVAES_KEYCOLS + 2] ^ tmp2; |
| expkey[4*idx+3] = expkey[4*idx - 4*NVAES_KEYCOLS + 3] ^ tmp3; |
| } |
| } |
| |
| /* encrypt one 128 bit block */ |
| void |
| nv_aes_encrypt(u_int8_t *in, u_int8_t *expkey, u_int8_t *out) |
| { |
| u_int8_t state[NVAES_STATECOLS * 4]; |
| u_int32_t round; |
| |
| memcpy(state, in, NVAES_STATECOLS * 4); |
| add_round_key((u_int32_t *)state, (u_int32_t *)expkey); |
| |
| for (round = 1; round < NVAES_ROUNDS + 1; round++) { |
| if (round < NVAES_ROUNDS) |
| mix_sub_columns (state); |
| else |
| shift_rows (state); |
| |
| add_round_key((u_int32_t *)state, (u_int32_t *)expkey + |
| round * NVAES_STATECOLS); |
| } |
| |
| memcpy(out, state, sizeof(state)); |
| } |