1 /* 2 * Copyright (c) 2016 Thomas Pornin <pornin (at) bolet.org> 3 * 4 * Permission is hereby granted, free of charge, to any person obtaining 5 * a copy of this software and associated documentation files (the 6 * "Software"), to deal in the Software without restriction, including 7 * without limitation the rights to use, copy, modify, merge, publish, 8 * distribute, sublicense, and/or sell copies of the Software, and to 9 * permit persons to whom the Software is furnished to do so, subject to 10 * the following conditions: 11 * 12 * The above copyright notice and this permission notice shall be 13 * included in all copies or substantial portions of the Software. 14 * 15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 16 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 18 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 19 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 20 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 21 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 22 * SOFTWARE. 23 */ 24 25 #include <sys/cdefs.h> 26 __KERNEL_RCSID(1, "$NetBSD: aes_sse2.c,v 1.2 2020/06/30 20:32:11 riastradh Exp $"); 27 28 #include <sys/types.h> 29 30 #ifdef _KERNEL 31 #include <lib/libkern/libkern.h> 32 #else 33 #include <stdint.h> 34 #include <string.h> 35 #endif 36 37 #include "aes_sse2_impl.h" 38 39 static void 40 br_range_dec32le(uint32_t *p32, size_t nwords, const void *v) 41 { 42 const uint8_t *p8 = v; 43 44 while (nwords --> 0) { 45 uint32_t x0 = *p8++; 46 uint32_t x1 = *p8++; 47 uint32_t x2 = *p8++; 48 uint32_t x3 = *p8++; 49 50 *p32++ = x0 | (x1 << 8) | (x2 << 16) | (x3 << 24); 51 } 52 } 53 54 void 55 aes_sse2_bitslice_Sbox(__m128i q[static 4]) 56 { 57 __m128i x0, x1, x2, x3, x4, x5, x6, x7; 58 __m128i y1, y2, y3, y4, y5, y6, y7, y8, y9; 59 __m128i y10, y11, y12, y13, y14, y15, y16, y17, y18, y19; 60 __m128i y20, y21; 61 __m128i z0, z1, z2, z3, z4, z5, z6, z7, z8, z9; 62 __m128i z10, z11, z12, z13, z14, z15, z16, z17; 63 __m128i t0, t1, t2, t3, t4, t5, t6, t7, t8, t9; 64 __m128i t10, t11, t12, t13, t14, t15, t16, t17, t18, t19; 65 __m128i t20, t21, t22, t23, t24, t25, t26, t27, t28, t29; 66 __m128i t30, t31, t32, t33, t34, t35, t36, t37, t38, t39; 67 __m128i t40, t41, t42, t43, t44, t45, t46, t47, t48, t49; 68 __m128i t50, t51, t52, t53, t54, t55, t56, t57, t58, t59; 69 __m128i t60, t61, t62, t63, t64, t65, t66, t67; 70 __m128i s0, s1, s2, s3, s4, s5, s6, s7; 71 72 x0 = _mm_shuffle_epi32(q[3], 0x0e); 73 x1 = _mm_shuffle_epi32(q[2], 0x0e); 74 x2 = _mm_shuffle_epi32(q[1], 0x0e); 75 x3 = _mm_shuffle_epi32(q[0], 0x0e); 76 x4 = q[3]; 77 x5 = q[2]; 78 x6 = q[1]; 79 x7 = q[0]; 80 81 /* 82 * Top linear transformation. 83 */ 84 y14 = x3 ^ x5; 85 y13 = x0 ^ x6; 86 y9 = x0 ^ x3; 87 y8 = x0 ^ x5; 88 t0 = x1 ^ x2; 89 y1 = t0 ^ x7; 90 y4 = y1 ^ x3; 91 y12 = y13 ^ y14; 92 y2 = y1 ^ x0; 93 y5 = y1 ^ x6; 94 y3 = y5 ^ y8; 95 t1 = x4 ^ y12; 96 y15 = t1 ^ x5; 97 y20 = t1 ^ x1; 98 y6 = y15 ^ x7; 99 y10 = y15 ^ t0; 100 y11 = y20 ^ y9; 101 y7 = x7 ^ y11; 102 y17 = y10 ^ y11; 103 y19 = y10 ^ y8; 104 y16 = t0 ^ y11; 105 y21 = y13 ^ y16; 106 y18 = x0 ^ y16; 107 108 /* 109 * Non-linear section. 110 */ 111 t2 = y12 & y15; 112 t3 = y3 & y6; 113 t4 = t3 ^ t2; 114 t5 = y4 & x7; 115 t6 = t5 ^ t2; 116 t7 = y13 & y16; 117 t8 = y5 & y1; 118 t9 = t8 ^ t7; 119 t10 = y2 & y7; 120 t11 = t10 ^ t7; 121 t12 = y9 & y11; 122 t13 = y14 & y17; 123 t14 = t13 ^ t12; 124 t15 = y8 & y10; 125 t16 = t15 ^ t12; 126 t17 = t4 ^ t14; 127 t18 = t6 ^ t16; 128 t19 = t9 ^ t14; 129 t20 = t11 ^ t16; 130 t21 = t17 ^ y20; 131 t22 = t18 ^ y19; 132 t23 = t19 ^ y21; 133 t24 = t20 ^ y18; 134 135 t25 = t21 ^ t22; 136 t26 = t21 & t23; 137 t27 = t24 ^ t26; 138 t28 = t25 & t27; 139 t29 = t28 ^ t22; 140 t30 = t23 ^ t24; 141 t31 = t22 ^ t26; 142 t32 = t31 & t30; 143 t33 = t32 ^ t24; 144 t34 = t23 ^ t33; 145 t35 = t27 ^ t33; 146 t36 = t24 & t35; 147 t37 = t36 ^ t34; 148 t38 = t27 ^ t36; 149 t39 = t29 & t38; 150 t40 = t25 ^ t39; 151 152 t41 = t40 ^ t37; 153 t42 = t29 ^ t33; 154 t43 = t29 ^ t40; 155 t44 = t33 ^ t37; 156 t45 = t42 ^ t41; 157 z0 = t44 & y15; 158 z1 = t37 & y6; 159 z2 = t33 & x7; 160 z3 = t43 & y16; 161 z4 = t40 & y1; 162 z5 = t29 & y7; 163 z6 = t42 & y11; 164 z7 = t45 & y17; 165 z8 = t41 & y10; 166 z9 = t44 & y12; 167 z10 = t37 & y3; 168 z11 = t33 & y4; 169 z12 = t43 & y13; 170 z13 = t40 & y5; 171 z14 = t29 & y2; 172 z15 = t42 & y9; 173 z16 = t45 & y14; 174 z17 = t41 & y8; 175 176 /* 177 * Bottom linear transformation. 178 */ 179 t46 = z15 ^ z16; 180 t47 = z10 ^ z11; 181 t48 = z5 ^ z13; 182 t49 = z9 ^ z10; 183 t50 = z2 ^ z12; 184 t51 = z2 ^ z5; 185 t52 = z7 ^ z8; 186 t53 = z0 ^ z3; 187 t54 = z6 ^ z7; 188 t55 = z16 ^ z17; 189 t56 = z12 ^ t48; 190 t57 = t50 ^ t53; 191 t58 = z4 ^ t46; 192 t59 = z3 ^ t54; 193 t60 = t46 ^ t57; 194 t61 = z14 ^ t57; 195 t62 = t52 ^ t58; 196 t63 = t49 ^ t58; 197 t64 = z4 ^ t59; 198 t65 = t61 ^ t62; 199 t66 = z1 ^ t63; 200 s0 = t59 ^ t63; 201 s6 = t56 ^ ~t62; 202 s7 = t48 ^ ~t60; 203 t67 = t64 ^ t65; 204 s3 = t53 ^ t66; 205 s4 = t51 ^ t66; 206 s5 = t47 ^ t65; 207 s1 = t64 ^ ~s3; 208 s2 = t55 ^ ~t67; 209 210 q[3] = _mm_unpacklo_epi64(s4, s0); 211 q[2] = _mm_unpacklo_epi64(s5, s1); 212 q[1] = _mm_unpacklo_epi64(s6, s2); 213 q[0] = _mm_unpacklo_epi64(s7, s3); 214 } 215 216 void 217 aes_sse2_ortho(__m128i q[static 4]) 218 { 219 #define SWAPN(cl, ch, s, x, y) do { \ 220 __m128i a, b; \ 221 a = (x); \ 222 b = (y); \ 223 (x) = (a & _mm_set1_epi64x(cl)) | \ 224 _mm_slli_epi64(b & _mm_set1_epi64x(cl), (s)); \ 225 (y) = _mm_srli_epi64(a & _mm_set1_epi64x(ch), (s)) | \ 226 (b & _mm_set1_epi64x(ch)); \ 227 } while (0) 228 229 #define SWAP2(x, y) SWAPN(0x5555555555555555, 0xAAAAAAAAAAAAAAAA, 1, x, y) 230 #define SWAP4(x, y) SWAPN(0x3333333333333333, 0xCCCCCCCCCCCCCCCC, 2, x, y) 231 #define SWAP8(x, y) SWAPN(0x0F0F0F0F0F0F0F0F, 0xF0F0F0F0F0F0F0F0, 4, x, y) 232 233 SWAP2(q[0], q[1]); 234 SWAP2(q[2], q[3]); 235 236 SWAP4(q[0], q[2]); 237 SWAP4(q[1], q[3]); 238 239 __m128i q0 = q[0]; 240 __m128i q1 = q[1]; 241 __m128i q2 = q[2]; 242 __m128i q3 = q[3]; 243 __m128i q4 = _mm_shuffle_epi32(q[0], 0x0e); 244 __m128i q5 = _mm_shuffle_epi32(q[1], 0x0e); 245 __m128i q6 = _mm_shuffle_epi32(q[2], 0x0e); 246 __m128i q7 = _mm_shuffle_epi32(q[3], 0x0e); 247 SWAP8(q0, q4); 248 SWAP8(q1, q5); 249 SWAP8(q2, q6); 250 SWAP8(q3, q7); 251 q[0] = _mm_unpacklo_epi64(q0, q4); 252 q[1] = _mm_unpacklo_epi64(q1, q5); 253 q[2] = _mm_unpacklo_epi64(q2, q6); 254 q[3] = _mm_unpacklo_epi64(q3, q7); 255 } 256 257 __m128i 258 aes_sse2_interleave_in(__m128i w) 259 { 260 __m128i lo, hi; 261 262 lo = _mm_shuffle_epi32(w, 0x10); 263 hi = _mm_shuffle_epi32(w, 0x32); 264 lo &= _mm_set1_epi64x(0x00000000FFFFFFFF); 265 hi &= _mm_set1_epi64x(0x00000000FFFFFFFF); 266 lo |= _mm_slli_epi64(lo, 16); 267 hi |= _mm_slli_epi64(hi, 16); 268 lo &= _mm_set1_epi32(0x0000FFFF); 269 hi &= _mm_set1_epi32(0x0000FFFF); 270 lo |= _mm_slli_epi64(lo, 8); 271 hi |= _mm_slli_epi64(hi, 8); 272 lo &= _mm_set1_epi16(0x00FF); 273 hi &= _mm_set1_epi16(0x00FF); 274 return lo | _mm_slli_epi64(hi, 8); 275 } 276 277 __m128i 278 aes_sse2_interleave_out(__m128i q) 279 { 280 __m128i lo, hi; 281 282 lo = q; 283 hi = _mm_srli_si128(q, 1); 284 lo &= _mm_set1_epi16(0x00FF); 285 hi &= _mm_set1_epi16(0x00FF); 286 lo |= _mm_srli_epi64(lo, 8); 287 hi |= _mm_srli_epi64(hi, 8); 288 lo &= _mm_set1_epi32(0x0000FFFF); 289 hi &= _mm_set1_epi32(0x0000FFFF); 290 lo |= _mm_srli_epi64(lo, 16); 291 hi |= _mm_srli_epi64(hi, 16); 292 return (__m128i)_mm_shuffle_ps((__m128)lo, (__m128)hi, 0x88); 293 } 294 295 static const unsigned char Rcon[] = { 296 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1B, 0x36 297 }; 298 299 static uint32_t 300 sub_word(uint32_t x) 301 { 302 __m128i q[4]; 303 uint32_t y; 304 305 memset(q, 0, sizeof(q)); 306 q[0] = _mm_loadu_si32(&x); 307 aes_sse2_ortho(q); 308 aes_sse2_bitslice_Sbox(q); 309 aes_sse2_ortho(q); 310 _mm_storeu_si32(&y, q[0]); 311 return y; 312 } 313 314 unsigned 315 aes_sse2_keysched(uint64_t *comp_skey, const void *key, size_t key_len) 316 { 317 unsigned num_rounds; 318 int i, j, k, nk, nkf; 319 uint32_t tmp; 320 uint32_t skey[60]; 321 322 switch (key_len) { 323 case 16: 324 num_rounds = 10; 325 break; 326 case 24: 327 num_rounds = 12; 328 break; 329 case 32: 330 num_rounds = 14; 331 break; 332 default: 333 /* abort(); */ 334 return 0; 335 } 336 nk = (int)(key_len >> 2); 337 nkf = (int)((num_rounds + 1) << 2); 338 br_range_dec32le(skey, (key_len >> 2), key); 339 tmp = skey[(key_len >> 2) - 1]; 340 for (i = nk, j = 0, k = 0; i < nkf; i ++) { 341 if (j == 0) { 342 tmp = (tmp << 24) | (tmp >> 8); 343 tmp = sub_word(tmp) ^ Rcon[k]; 344 } else if (nk > 6 && j == 4) { 345 tmp = sub_word(tmp); 346 } 347 tmp ^= skey[i - nk]; 348 skey[i] = tmp; 349 if (++ j == nk) { 350 j = 0; 351 k ++; 352 } 353 } 354 355 for (i = 0, j = 0; i < nkf; i += 4, j += 2) { 356 __m128i q[4], q0, q1, q2, q3, q4, q5, q6, q7; 357 __m128i w; 358 359 w = _mm_loadu_epi8(skey + i); 360 q[0] = q[1] = q[2] = q[3] = aes_sse2_interleave_in(w); 361 aes_sse2_ortho(q); 362 q0 = q[0] & _mm_set1_epi64x(0x1111111111111111); 363 q1 = q[1] & _mm_set1_epi64x(0x2222222222222222); 364 q2 = q[2] & _mm_set1_epi64x(0x4444444444444444); 365 q3 = q[3] & _mm_set1_epi64x(0x8888888888888888); 366 q4 = _mm_shuffle_epi32(q0, 0x0e); 367 q5 = _mm_shuffle_epi32(q1, 0x0e); 368 q6 = _mm_shuffle_epi32(q2, 0x0e); 369 q7 = _mm_shuffle_epi32(q3, 0x0e); 370 _mm_storeu_si64(&comp_skey[j + 0], q0 | q1 | q2 | q3); 371 _mm_storeu_si64(&comp_skey[j + 1], q4 | q5 | q6 | q7); 372 } 373 return num_rounds; 374 } 375 376 void 377 aes_sse2_skey_expand(uint64_t *skey, 378 unsigned num_rounds, const uint64_t *comp_skey) 379 { 380 unsigned u, v, n; 381 382 n = (num_rounds + 1) << 1; 383 for (u = 0, v = 0; u < n; u ++, v += 4) { 384 __m128i x0, x1, x2, x3; 385 386 x0 = x1 = x2 = x3 = _mm_loadu_si64(&comp_skey[u]); 387 x0 &= 0x1111111111111111; 388 x1 &= 0x2222222222222222; 389 x2 &= 0x4444444444444444; 390 x3 &= 0x8888888888888888; 391 x1 = _mm_srli_epi64(x1, 1); 392 x2 = _mm_srli_epi64(x2, 2); 393 x3 = _mm_srli_epi64(x3, 3); 394 x0 = _mm_sub_epi64(_mm_slli_epi64(x0, 4), x0); 395 x1 = _mm_sub_epi64(_mm_slli_epi64(x1, 4), x1); 396 x2 = _mm_sub_epi64(_mm_slli_epi64(x2, 4), x2); 397 x3 = _mm_sub_epi64(_mm_slli_epi64(x3, 4), x3); 398 _mm_storeu_si64(&skey[v + 0], x0); 399 _mm_storeu_si64(&skey[v + 1], x1); 400 _mm_storeu_si64(&skey[v + 2], x2); 401 _mm_storeu_si64(&skey[v + 3], x3); 402 } 403 } 404
Indexes created Sat Sep 27 14:09:57 GMT 2025