1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
|
/* Rijndael (AES) for GnuPG - PowerPC Vector Crypto AES implementation
* Copyright (C) 2019 Shawn Landden <shawn@git.icu>
* Copyright (C) 2019-2020 Jussi Kivilinna <jussi.kivilinna@iki.fi>
*
* This file is part of Libgcrypt.
*
* Libgcrypt is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* Libgcrypt 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this program; if not, see <http://www.gnu.org/licenses/>.
*
* Alternatively, this code may be used in OpenSSL from The OpenSSL Project,
* and Cryptogams by Andy Polyakov, and if made part of a release of either
* or both projects, is thereafter dual-licensed under the license said project
* is released under.
*/
#include <config.h>
#include "rijndael-internal.h"
#include "cipher-internal.h"
#include "bufhelp.h"
#ifdef USE_PPC_CRYPTO
#include "rijndael-ppc-common.h"
#ifdef WORDS_BIGENDIAN
static const block vec_bswap32_const =
{ 3, 2, 1, 0, 7, 6, 5, 4, 11, 10, 9, 8, 15, 14, 13, 12 };
#else
static const block vec_bswap32_const_neg =
{ ~3, ~2, ~1, ~0, ~7, ~6, ~5, ~4, ~11, ~10, ~9, ~8, ~15, ~14, ~13, ~12 };
#endif
static ASM_FUNC_ATTR_INLINE block
asm_load_be_const(void)
{
#ifndef WORDS_BIGENDIAN
return ALIGNED_LOAD (&vec_bswap32_const_neg, 0);
#else
static const block vec_dummy = { 0 };
return vec_dummy;
#endif
}
static ASM_FUNC_ATTR_INLINE block
asm_be_swap(block vec, block be_bswap_const)
{
(void)be_bswap_const;
#ifndef WORDS_BIGENDIAN
return asm_vperm1 (vec, be_bswap_const);
#else
return vec;
#endif
}
static ASM_FUNC_ATTR_INLINE block
asm_load_be_noswap(unsigned long offset, const void *ptr)
{
block vec;
#if __GNUC__ >= 4
if (__builtin_constant_p (offset) && offset == 0)
__asm__ volatile ("lxvw4x %x0,0,%1\n\t"
: "=wa" (vec)
: "r" ((uintptr_t)ptr)
: "memory");
else
#endif
__asm__ volatile ("lxvw4x %x0,%1,%2\n\t"
: "=wa" (vec)
: "r" (offset), "r" ((uintptr_t)ptr)
: "memory", "r0");
/* NOTE: vec needs to be be-swapped using 'asm_be_swap' by caller */
return vec;
}
static ASM_FUNC_ATTR_INLINE void
asm_store_be_noswap(block vec, unsigned long offset, void *ptr)
{
/* NOTE: vec be-swapped using 'asm_be_swap' by caller */
#if __GNUC__ >= 4
if (__builtin_constant_p (offset) && offset == 0)
__asm__ volatile ("stxvw4x %x0,0,%1\n\t"
:
: "wa" (vec), "r" ((uintptr_t)ptr)
: "memory");
else
#endif
__asm__ volatile ("stxvw4x %x0,%1,%2\n\t"
:
: "wa" (vec), "r" (offset), "r" ((uintptr_t)ptr)
: "memory", "r0");
}
static ASM_FUNC_ATTR_INLINE u32
_gcry_aes_sbox4_ppc8(u32 fourbytes)
{
union
{
PROPERLY_ALIGNED_TYPE dummy;
block data_vec;
u32 data32[4];
} u;
u.data32[0] = fourbytes;
u.data_vec = vec_sbox_be(u.data_vec);
return u.data32[0];
}
void
_gcry_aes_ppc8_setkey (RIJNDAEL_context *ctx, const byte *key)
{
const block bige_const = asm_load_be_const();
union
{
PROPERLY_ALIGNED_TYPE dummy;
byte data[MAXKC][4];
u32 data32[MAXKC];
} tkk[2];
unsigned int rounds = ctx->rounds;
int KC = rounds - 6;
unsigned int keylen = KC * 4;
u128_t *ekey = (u128_t *)(void *)ctx->keyschenc;
unsigned int i, r, t;
byte rcon = 1;
int j;
#define k tkk[0].data
#define k_u32 tkk[0].data32
#define tk tkk[1].data
#define tk_u32 tkk[1].data32
#define W (ctx->keyschenc)
#define W_u32 (ctx->keyschenc32)
for (i = 0; i < keylen; i++)
{
k[i >> 2][i & 3] = key[i];
}
for (j = KC-1; j >= 0; j--)
{
tk_u32[j] = k_u32[j];
}
r = 0;
t = 0;
/* Copy values into round key array. */
for (j = 0; (j < KC) && (r < rounds + 1); )
{
for (; (j < KC) && (t < 4); j++, t++)
{
W_u32[r][t] = le_bswap32(tk_u32[j]);
}
if (t == 4)
{
r++;
t = 0;
}
}
while (r < rounds + 1)
{
tk_u32[0] ^=
le_bswap32(
_gcry_aes_sbox4_ppc8(rol(le_bswap32(tk_u32[KC - 1]), 24)) ^ rcon);
if (KC != 8)
{
for (j = 1; j < KC; j++)
{
tk_u32[j] ^= tk_u32[j-1];
}
}
else
{
for (j = 1; j < KC/2; j++)
{
tk_u32[j] ^= tk_u32[j-1];
}
tk_u32[KC/2] ^=
le_bswap32(_gcry_aes_sbox4_ppc8(le_bswap32(tk_u32[KC/2 - 1])));
for (j = KC/2 + 1; j < KC; j++)
{
tk_u32[j] ^= tk_u32[j-1];
}
}
/* Copy values into round key array. */
for (j = 0; (j < KC) && (r < rounds + 1); )
{
for (; (j < KC) && (t < 4); j++, t++)
{
W_u32[r][t] = le_bswap32(tk_u32[j]);
}
if (t == 4)
{
r++;
t = 0;
}
}
rcon = (rcon << 1) ^ (-(rcon >> 7) & 0x1b);
}
/* Store in big-endian order. */
for (r = 0; r <= rounds; r++)
{
#ifndef WORDS_BIGENDIAN
VEC_STORE_BE(ekey, r, ALIGNED_LOAD (ekey, r), bige_const);
#else
block rvec = ALIGNED_LOAD (ekey, r);
ALIGNED_STORE (ekey, r,
vec_perm(rvec, rvec, vec_bswap32_const));
(void)bige_const;
#endif
}
#undef W
#undef tk
#undef k
#undef W_u32
#undef tk_u32
#undef k_u32
wipememory(&tkk, sizeof(tkk));
}
void
_gcry_aes_ppc8_prepare_decryption (RIJNDAEL_context *ctx)
{
internal_aes_ppc_prepare_decryption (ctx);
}
#define GCRY_AES_PPC8 1
#define ENCRYPT_BLOCK_FUNC _gcry_aes_ppc8_encrypt
#define DECRYPT_BLOCK_FUNC _gcry_aes_ppc8_decrypt
#define CFB_ENC_FUNC _gcry_aes_ppc8_cfb_enc
#define CFB_DEC_FUNC _gcry_aes_ppc8_cfb_dec
#define CBC_ENC_FUNC _gcry_aes_ppc8_cbc_enc
#define CBC_DEC_FUNC _gcry_aes_ppc8_cbc_dec
#define CTR_ENC_FUNC _gcry_aes_ppc8_ctr_enc
#define OCB_CRYPT_FUNC _gcry_aes_ppc8_ocb_crypt
#define OCB_AUTH_FUNC _gcry_aes_ppc8_ocb_auth
#define XTS_CRYPT_FUNC _gcry_aes_ppc8_xts_crypt
#include <rijndael-ppc-functions.h>
#endif /* USE_PPC_CRYPTO */
|
