diff options
author | Allen Martin <amartin@nvidia.com> | 2011-01-25 12:56:10 -0800 |
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committer | Allen Martin <amartin@nvidia.com> | 2011-01-25 12:56:10 -0800 |
commit | a5e100250148eb5ca3a8de06b4f136f8097c8d23 (patch) | |
tree | d0471989ebb23a9107bca9e04b9ab7125b19a25e /aes_ref.c | |
parent | 8d782eec336359bb3a694e1a71b85cb3f0a3440f (diff) | |
download | nvidia-cbootimage-a5e100250148eb5ca3a8de06b4f136f8097c8d23.tar.gz |
Remove extra path element.
Remove extra path element that came as part of the git I cloned
this from.
Diffstat (limited to 'aes_ref.c')
-rw-r--r-- | aes_ref.c | 330 |
1 files changed, 330 insertions, 0 deletions
diff --git a/aes_ref.c b/aes_ref.c new file mode 100644 index 0000000..e86f237 --- /dev/null +++ b/aes_ref.c @@ -0,0 +1,330 @@ +/* + * (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)); +} |