| blob | be6d9e365a800a8569fb4915fccbfc50b0793a09 |
1 /*
2 * Implement AES algorithm in Intel AES-NI instructions.
3 *
4 * The white paper of AES-NI instructions can be downloaded from:
5 * http://softwarecommunity.intel.com/isn/downloads/intelavx/AES-Instructions-Set_WP.pdf
6 *
7 * Copyright (C) 2008, Intel Corp.
8 * Author: Huang Ying <ying.huang@intel.com>
9 * Vinodh Gopal <vinodh.gopal@intel.com>
10 * Kahraman Akdemir
11 *
12 * Added RFC4106 AES-GCM support for 128-bit keys under the AEAD
13 * interface for 64-bit kernels.
14 * Authors: Erdinc Ozturk (erdinc.ozturk@intel.com)
15 * Aidan O'Mahony (aidan.o.mahony@intel.com)
16 * Adrian Hoban <adrian.hoban@intel.com>
17 * James Guilford (james.guilford@intel.com)
18 * Gabriele Paoloni <gabriele.paoloni@intel.com>
19 * Tadeusz Struk (tadeusz.struk@intel.com)
20 * Wajdi Feghali (wajdi.k.feghali@intel.com)
21 * Copyright (c) 2010, Intel Corporation.
22 *
23 * Ported x86_64 version to x86:
24 * Author: Mathias Krause <minipli@googlemail.com>
25 *
26 * This program is free software; you can redistribute it and/or modify
27 * it under the terms of the GNU General Public License as published by
28 * the Free Software Foundation; either version 2 of the License, or
29 * (at your option) any later version.
30 */
32 #include <linux/linkage.h>
33 #include <asm/inst.h>
35 #ifdef __x86_64__
36 .data
37 POLY: .octa 0xC2000000000000000000000000000001
38 TWOONE: .octa 0x00000001000000000000000000000001
40 # order of these constants should not change.
41 # more specifically, ALL_F should follow SHIFT_MASK,
42 # and ZERO should follow ALL_F
44 SHUF_MASK: .octa 0x000102030405060708090A0B0C0D0E0F
45 MASK1: .octa 0x0000000000000000ffffffffffffffff
46 MASK2: .octa 0xffffffffffffffff0000000000000000
47 SHIFT_MASK: .octa 0x0f0e0d0c0b0a09080706050403020100
48 ALL_F: .octa 0xffffffffffffffffffffffffffffffff
49 ZERO: .octa 0x00000000000000000000000000000000
50 ONE: .octa 0x00000000000000000000000000000001
51 F_MIN_MASK: .octa 0xf1f2f3f4f5f6f7f8f9fafbfcfdfeff0
52 dec: .octa 0x1
53 enc: .octa 0x2
56 .text
59 #define STACK_OFFSET 8*3
60 #define HashKey 16*0 // store HashKey <<1 mod poly here
61 #define HashKey_2 16*1 // store HashKey^2 <<1 mod poly here
62 #define HashKey_3 16*2 // store HashKey^3 <<1 mod poly here
63 #define HashKey_4 16*3 // store HashKey^4 <<1 mod poly here
64 #define HashKey_k 16*4 // store XOR of High 64 bits and Low 64
65 // bits of HashKey <<1 mod poly here
66 //(for Karatsuba purposes)
67 #define HashKey_2_k 16*5 // store XOR of High 64 bits and Low 64
68 // bits of HashKey^2 <<1 mod poly here
69 // (for Karatsuba purposes)
70 #define HashKey_3_k 16*6 // store XOR of High 64 bits and Low 64
71 // bits of HashKey^3 <<1 mod poly here
72 // (for Karatsuba purposes)
73 #define HashKey_4_k 16*7 // store XOR of High 64 bits and Low 64
74 // bits of HashKey^4 <<1 mod poly here
75 // (for Karatsuba purposes)
76 #define VARIABLE_OFFSET 16*8
78 #define arg1 rdi
79 #define arg2 rsi
80 #define arg3 rdx
81 #define arg4 rcx
82 #define arg5 r8
83 #define arg6 r9
84 #define arg7 STACK_OFFSET+8(%r14)
85 #define arg8 STACK_OFFSET+16(%r14)
86 #define arg9 STACK_OFFSET+24(%r14)
87 #define arg10 STACK_OFFSET+32(%r14)
88 #endif
91 #define STATE1 %xmm0
92 #define STATE2 %xmm4
93 #define STATE3 %xmm5
94 #define STATE4 %xmm6
95 #define STATE STATE1
96 #define IN1 %xmm1
97 #define IN2 %xmm7
98 #define IN3 %xmm8
99 #define IN4 %xmm9
100 #define IN IN1
101 #define KEY %xmm2
102 #define IV %xmm3
104 #define BSWAP_MASK %xmm10
105 #define CTR %xmm11
106 #define INC %xmm12
108 #ifdef __x86_64__
109 #define AREG %rax
110 #define KEYP %rdi
111 #define OUTP %rsi
112 #define UKEYP OUTP
113 #define INP %rdx
114 #define LEN %rcx
115 #define IVP %r8
116 #define KLEN %r9d
117 #define T1 %r10
118 #define TKEYP T1
119 #define T2 %r11
120 #define TCTR_LOW T2
121 #else
122 #define AREG %eax
123 #define KEYP %edi
124 #define OUTP AREG
125 #define UKEYP OUTP
126 #define INP %edx
127 #define LEN %esi
128 #define IVP %ebp
129 #define KLEN %ebx
130 #define T1 %ecx
131 #define TKEYP T1
132 #endif
135 #ifdef __x86_64__
136 /* GHASH_MUL MACRO to implement: Data*HashKey mod (128,127,126,121,0)
137 *
138 *
139 * Input: A and B (128-bits each, bit-reflected)
140 * Output: C = A*B*x mod poly, (i.e. >>1 )
141 * To compute GH = GH*HashKey mod poly, give HK = HashKey<<1 mod poly as input
142 * GH = GH * HK * x mod poly which is equivalent to GH*HashKey mod poly.
143 *
144 */
145 .macro GHASH_MUL GH HK TMP1 TMP2 TMP3 TMP4 TMP5
146 movdqa \GH, \TMP1
147 pshufd $78, \GH, \TMP2
148 pshufd $78, \HK, \TMP3
149 pxor \GH, \TMP2 # TMP2 = a1+a0
150 pxor \HK, \TMP3 # TMP3 = b1+b0
151 PCLMULQDQ 0x11, \HK, \TMP1 # TMP1 = a1*b1
152 PCLMULQDQ 0x00, \HK, \GH # GH = a0*b0
153 PCLMULQDQ 0x00, \TMP3, \TMP2 # TMP2 = (a0+a1)*(b1+b0)
154 pxor \GH, \TMP2
155 pxor \TMP1, \TMP2 # TMP2 = (a0*b0)+(a1*b0)
156 movdqa \TMP2, \TMP3
157 pslldq $8, \TMP3 # left shift TMP3 2 DWs
158 psrldq $8, \TMP2 # right shift TMP2 2 DWs
159 pxor \TMP3, \GH
160 pxor \TMP2, \TMP1 # TMP2:GH holds the result of GH*HK
162 # first phase of the reduction
164 movdqa \GH, \TMP2
165 movdqa \GH, \TMP3
166 movdqa \GH, \TMP4 # copy GH into TMP2,TMP3 and TMP4
167 # in in order to perform
168 # independent shifts
169 pslld $31, \TMP2 # packed right shift <<31
170 pslld $30, \TMP3 # packed right shift <<30
171 pslld $25, \TMP4 # packed right shift <<25
172 pxor \TMP3, \TMP2 # xor the shifted versions
173 pxor \TMP4, \TMP2
174 movdqa \TMP2, \TMP5
175 psrldq $4, \TMP5 # right shift TMP5 1 DW
176 pslldq $12, \TMP2 # left shift TMP2 3 DWs
177 pxor \TMP2, \GH
179 # second phase of the reduction
181 movdqa \GH,\TMP2 # copy GH into TMP2,TMP3 and TMP4
182 # in in order to perform
183 # independent shifts
184 movdqa \GH,\TMP3
185 movdqa \GH,\TMP4
186 psrld $1,\TMP2 # packed left shift >>1
187 psrld $2,\TMP3 # packed left shift >>2
188 psrld $7,\TMP4 # packed left shift >>7
189 pxor \TMP3,\TMP2 # xor the shifted versions
190 pxor \TMP4,\TMP2
191 pxor \TMP5, \TMP2
192 pxor \TMP2, \GH
193 pxor \TMP1, \GH # result is in TMP1
194 .endm
196 /*
197 * if a = number of total plaintext bytes
198 * b = floor(a/16)
199 * num_initial_blocks = b mod 4
200 * encrypt the initial num_initial_blocks blocks and apply ghash on
201 * the ciphertext
202 * %r10, %r11, %r12, %rax, %xmm5, %xmm6, %xmm7, %xmm8, %xmm9 registers
203 * are clobbered
204 * arg1, %arg2, %arg3, %r14 are used as a pointer only, not modified
205 */
208 .macro INITIAL_BLOCKS_DEC num_initial_blocks TMP1 TMP2 TMP3 TMP4 TMP5 XMM0 XMM1 \
209 XMM2 XMM3 XMM4 XMMDst TMP6 TMP7 i i_seq operation
210 mov arg7, %r10 # %r10 = AAD
211 mov arg8, %r12 # %r12 = aadLen
212 mov %r12, %r11
213 pxor %xmm\i, %xmm\i
214 _get_AAD_loop\num_initial_blocks\operation:
215 movd (%r10), \TMP1
216 pslldq $12, \TMP1
217 psrldq $4, %xmm\i
218 pxor \TMP1, %xmm\i
219 add $4, %r10
220 sub $4, %r12
221 jne _get_AAD_loop\num_initial_blocks\operation
222 cmp $16, %r11
223 je _get_AAD_loop2_done\num_initial_blocks\operation
224 mov $16, %r12
225 _get_AAD_loop2\num_initial_blocks\operation:
226 psrldq $4, %xmm\i
227 sub $4, %r12
228 cmp %r11, %r12
229 jne _get_AAD_loop2\num_initial_blocks\operation
230 _get_AAD_loop2_done\num_initial_blocks\operation:
231 movdqa SHUF_MASK(%rip), %xmm14
232 PSHUFB_XMM %xmm14, %xmm\i # byte-reflect the AAD data
234 xor %r11, %r11 # initialise the data pointer offset as zero
236 # start AES for num_initial_blocks blocks
238 mov %arg5, %rax # %rax = *Y0
239 movdqu (%rax), \XMM0 # XMM0 = Y0
240 movdqa SHUF_MASK(%rip), %xmm14
241 PSHUFB_XMM %xmm14, \XMM0
243 .if (\i == 5) || (\i == 6) || (\i == 7)
244 .irpc index, \i_seq
245 paddd ONE(%rip), \XMM0 # INCR Y0
246 movdqa \XMM0, %xmm\index
247 movdqa SHUF_MASK(%rip), %xmm14
248 PSHUFB_XMM %xmm14, %xmm\index # perform a 16 byte swap
250 .endr
251 .irpc index, \i_seq
252 pxor 16*0(%arg1), %xmm\index
253 .endr
254 .irpc index, \i_seq
255 movaps 0x10(%rdi), \TMP1
256 AESENC \TMP1, %xmm\index # Round 1
257 .endr
258 .irpc index, \i_seq
259 movaps 0x20(%arg1), \TMP1
260 AESENC \TMP1, %xmm\index # Round 2
261 .endr
262 .irpc index, \i_seq
263 movaps 0x30(%arg1), \TMP1
264 AESENC \TMP1, %xmm\index # Round 2
265 .endr
266 .irpc index, \i_seq
267 movaps 0x40(%arg1), \TMP1
268 AESENC \TMP1, %xmm\index # Round 2
269 .endr
270 .irpc index, \i_seq
271 movaps 0x50(%arg1), \TMP1
272 AESENC \TMP1, %xmm\index # Round 2
273 .endr
274 .irpc index, \i_seq
275 movaps 0x60(%arg1), \TMP1
276 AESENC \TMP1, %xmm\index # Round 2
277 .endr
278 .irpc index, \i_seq
279 movaps 0x70(%arg1), \TMP1
280 AESENC \TMP1, %xmm\index # Round 2
281 .endr
282 .irpc index, \i_seq
283 movaps 0x80(%arg1), \TMP1
284 AESENC \TMP1, %xmm\index # Round 2
285 .endr
286 .irpc index, \i_seq
287 movaps 0x90(%arg1), \TMP1
288 AESENC \TMP1, %xmm\index # Round 2
289 .endr
290 .irpc index, \i_seq
291 movaps 0xa0(%arg1), \TMP1
292 AESENCLAST \TMP1, %xmm\index # Round 10
293 .endr
294 .irpc index, \i_seq
295 movdqu (%arg3 , %r11, 1), \TMP1
296 pxor \TMP1, %xmm\index
297 movdqu %xmm\index, (%arg2 , %r11, 1)
298 # write back plaintext/ciphertext for num_initial_blocks
299 add $16, %r11
301 movdqa \TMP1, %xmm\index
302 movdqa SHUF_MASK(%rip), %xmm14
303 PSHUFB_XMM %xmm14, %xmm\index
305 # prepare plaintext/ciphertext for GHASH computation
306 .endr
307 .endif
308 GHASH_MUL %xmm\i, \TMP3, \TMP1, \TMP2, \TMP4, \TMP5, \XMM1
309 # apply GHASH on num_initial_blocks blocks
311 .if \i == 5
312 pxor %xmm5, %xmm6
313 GHASH_MUL %xmm6, \TMP3, \TMP1, \TMP2, \TMP4, \TMP5, \XMM1
314 pxor %xmm6, %xmm7
315 GHASH_MUL %xmm7, \TMP3, \TMP1, \TMP2, \TMP4, \TMP5, \XMM1
316 pxor %xmm7, %xmm8
317 GHASH_MUL %xmm8, \TMP3, \TMP1, \TMP2, \TMP4, \TMP5, \XMM1
318 .elseif \i == 6
319 pxor %xmm6, %xmm7
320 GHASH_MUL %xmm7, \TMP3, \TMP1, \TMP2, \TMP4, \TMP5, \XMM1
321 pxor %xmm7, %xmm8
322 GHASH_MUL %xmm8, \TMP3, \TMP1, \TMP2, \TMP4, \TMP5, \XMM1
323 .elseif \i == 7
324 pxor %xmm7, %xmm8
325 GHASH_MUL %xmm8, \TMP3, \TMP1, \TMP2, \TMP4, \TMP5, \XMM1
326 .endif
327 cmp $64, %r13
328 jl _initial_blocks_done\num_initial_blocks\operation
329 # no need for precomputed values
330 /*
331 *
332 * Precomputations for HashKey parallel with encryption of first 4 blocks.
333 * Haskey_i_k holds XORed values of the low and high parts of the Haskey_i
334 */
335 paddd ONE(%rip), \XMM0 # INCR Y0
336 movdqa \XMM0, \XMM1
337 movdqa SHUF_MASK(%rip), %xmm14
338 PSHUFB_XMM %xmm14, \XMM1 # perform a 16 byte swap
340 paddd ONE(%rip), \XMM0 # INCR Y0
341 movdqa \XMM0, \XMM2
342 movdqa SHUF_MASK(%rip), %xmm14
343 PSHUFB_XMM %xmm14, \XMM2 # perform a 16 byte swap
345 paddd ONE(%rip), \XMM0 # INCR Y0
346 movdqa \XMM0, \XMM3
347 movdqa SHUF_MASK(%rip), %xmm14
348 PSHUFB_XMM %xmm14, \XMM3 # perform a 16 byte swap
350 paddd ONE(%rip), \XMM0 # INCR Y0
351 movdqa \XMM0, \XMM4
352 movdqa SHUF_MASK(%rip), %xmm14
353 PSHUFB_XMM %xmm14, \XMM4 # perform a 16 byte swap
355 pxor 16*0(%arg1), \XMM1
356 pxor 16*0(%arg1), \XMM2
357 pxor 16*0(%arg1), \XMM3
358 pxor 16*0(%arg1), \XMM4
359 movdqa \TMP3, \TMP5
360 pshufd $78, \TMP3, \TMP1
361 pxor \TMP3, \TMP1
362 movdqa \TMP1, HashKey_k(%rsp)
363 GHASH_MUL \TMP5, \TMP3, \TMP1, \TMP2, \TMP4, \TMP6, \TMP7
364 # TMP5 = HashKey^2<<1 (mod poly)
365 movdqa \TMP5, HashKey_2(%rsp)
366 # HashKey_2 = HashKey^2<<1 (mod poly)
367 pshufd $78, \TMP5, \TMP1
368 pxor \TMP5, \TMP1
369 movdqa \TMP1, HashKey_2_k(%rsp)
370 .irpc index, 1234 # do 4 rounds
371 movaps 0x10*\index(%arg1), \TMP1
372 AESENC \TMP1, \XMM1
373 AESENC \TMP1, \XMM2
374 AESENC \TMP1, \XMM3
375 AESENC \TMP1, \XMM4
376 .endr
377 GHASH_MUL \TMP5, \TMP3, \TMP1, \TMP2, \TMP4, \TMP6, \TMP7
378 # TMP5 = HashKey^3<<1 (mod poly)
379 movdqa \TMP5, HashKey_3(%rsp)
380 pshufd $78, \TMP5, \TMP1
381 pxor \TMP5, \TMP1
382 movdqa \TMP1, HashKey_3_k(%rsp)
383 .irpc index, 56789 # do next 5 rounds
384 movaps 0x10*\index(%arg1), \TMP1
385 AESENC \TMP1, \XMM1
386 AESENC \TMP1, \XMM2
387 AESENC \TMP1, \XMM3
388 AESENC \TMP1, \XMM4
389 .endr
390 GHASH_MUL \TMP5, \TMP3, \TMP1, \TMP2, \TMP4, \TMP6, \TMP7
391 # TMP5 = HashKey^3<<1 (mod poly)
392 movdqa \TMP5, HashKey_4(%rsp)
393 pshufd $78, \TMP5, \TMP1
394 pxor \TMP5, \TMP1
395 movdqa \TMP1, HashKey_4_k(%rsp)
396 movaps 0xa0(%arg1), \TMP2
397 AESENCLAST \TMP2, \XMM1
398 AESENCLAST \TMP2, \XMM2
399 AESENCLAST \TMP2, \XMM3
400 AESENCLAST \TMP2, \XMM4
401 movdqu 16*0(%arg3 , %r11 , 1), \TMP1
402 pxor \TMP1, \XMM1
403 movdqu \XMM1, 16*0(%arg2 , %r11 , 1)
404 movdqa \TMP1, \XMM1
405 movdqu 16*1(%arg3 , %r11 , 1), \TMP1
406 pxor \TMP1, \XMM2
407 movdqu \XMM2, 16*1(%arg2 , %r11 , 1)
408 movdqa \TMP1, \XMM2
409 movdqu 16*2(%arg3 , %r11 , 1), \TMP1
410 pxor \TMP1, \XMM3
411 movdqu \XMM3, 16*2(%arg2 , %r11 , 1)
412 movdqa \TMP1, \XMM3
413 movdqu 16*3(%arg3 , %r11 , 1), \TMP1
414 pxor \TMP1, \XMM4
415 movdqu \XMM4, 16*3(%arg2 , %r11 , 1)
416 movdqa \TMP1, \XMM4
417 add $64, %r11
418 movdqa SHUF_MASK(%rip), %xmm14
419 PSHUFB_XMM %xmm14, \XMM1 # perform a 16 byte swap
420 pxor \XMMDst, \XMM1
421 # combine GHASHed value with the corresponding ciphertext
422 movdqa SHUF_MASK(%rip), %xmm14
423 PSHUFB_XMM %xmm14, \XMM2 # perform a 16 byte swap
424 movdqa SHUF_MASK(%rip), %xmm14
425 PSHUFB_XMM %xmm14, \XMM3 # perform a 16 byte swap
426 movdqa SHUF_MASK(%rip), %xmm14
427 PSHUFB_XMM %xmm14, \XMM4 # perform a 16 byte swap
429 _initial_blocks_done\num_initial_blocks\operation:
431 .endm
434 /*
435 * if a = number of total plaintext bytes
436 * b = floor(a/16)
437 * num_initial_blocks = b mod 4
438 * encrypt the initial num_initial_blocks blocks and apply ghash on
439 * the ciphertext
440 * %r10, %r11, %r12, %rax, %xmm5, %xmm6, %xmm7, %xmm8, %xmm9 registers
441 * are clobbered
442 * arg1, %arg2, %arg3, %r14 are used as a pointer only, not modified
443 */
446 .macro INITIAL_BLOCKS_ENC num_initial_blocks TMP1 TMP2 TMP3 TMP4 TMP5 XMM0 XMM1 \
447 XMM2 XMM3 XMM4 XMMDst TMP6 TMP7 i i_seq operation
448 mov arg7, %r10 # %r10 = AAD
449 mov arg8, %r12 # %r12 = aadLen
450 mov %r12, %r11
451 pxor %xmm\i, %xmm\i
452 _get_AAD_loop\num_initial_blocks\operation:
453 movd (%r10), \TMP1
454 pslldq $12, \TMP1
455 psrldq $4, %xmm\i
456 pxor \TMP1, %xmm\i
457 add $4, %r10
458 sub $4, %r12
459 jne _get_AAD_loop\num_initial_blocks\operation
460 cmp $16, %r11
461 je _get_AAD_loop2_done\num_initial_blocks\operation
462 mov $16, %r12
463 _get_AAD_loop2\num_initial_blocks\operation:
464 psrldq $4, %xmm\i
465 sub $4, %r12
466 cmp %r11, %r12
467 jne _get_AAD_loop2\num_initial_blocks\operation
468 _get_AAD_loop2_done\num_initial_blocks\operation:
469 movdqa SHUF_MASK(%rip), %xmm14
470 PSHUFB_XMM %xmm14, %xmm\i # byte-reflect the AAD data
472 xor %r11, %r11 # initialise the data pointer offset as zero
474 # start AES for num_initial_blocks blocks
476 mov %arg5, %rax # %rax = *Y0
477 movdqu (%rax), \XMM0 # XMM0 = Y0
478 movdqa SHUF_MASK(%rip), %xmm14
479 PSHUFB_XMM %xmm14, \XMM0
481 .if (\i == 5) || (\i == 6) || (\i == 7)
482 .irpc index, \i_seq
483 paddd ONE(%rip), \XMM0 # INCR Y0
484 movdqa \XMM0, %xmm\index
485 movdqa SHUF_MASK(%rip), %xmm14
486 PSHUFB_XMM %xmm14, %xmm\index # perform a 16 byte swap
488 .endr
489 .irpc index, \i_seq
490 pxor 16*0(%arg1), %xmm\index
491 .endr
492 .irpc index, \i_seq
493 movaps 0x10(%rdi), \TMP1
494 AESENC \TMP1, %xmm\index # Round 1
495 .endr
496 .irpc index, \i_seq
497 movaps 0x20(%arg1), \TMP1
498 AESENC \TMP1, %xmm\index # Round 2
499 .endr
500 .irpc index, \i_seq
501 movaps 0x30(%arg1), \TMP1
502 AESENC \TMP1, %xmm\index # Round 2
503 .endr
504 .irpc index, \i_seq
505 movaps 0x40(%arg1), \TMP1
506 AESENC \TMP1, %xmm\index # Round 2
507 .endr
508 .irpc index, \i_seq
509 movaps 0x50(%arg1), \TMP1
510 AESENC \TMP1, %xmm\index # Round 2
511 .endr
512 .irpc index, \i_seq
513 movaps 0x60(%arg1), \TMP1
514 AESENC \TMP1, %xmm\index # Round 2
515 .endr
516 .irpc index, \i_seq
517 movaps 0x70(%arg1), \TMP1
518 AESENC \TMP1, %xmm\index # Round 2
519 .endr
520 .irpc index, \i_seq
521 movaps 0x80(%arg1), \TMP1
522 AESENC \TMP1, %xmm\index # Round 2
523 .endr
524 .irpc index, \i_seq
525 movaps 0x90(%arg1), \TMP1
526 AESENC \TMP1, %xmm\index # Round 2
527 .endr
528 .irpc index, \i_seq
529 movaps 0xa0(%arg1), \TMP1
530 AESENCLAST \TMP1, %xmm\index # Round 10
531 .endr
532 .irpc index, \i_seq
533 movdqu (%arg3 , %r11, 1), \TMP1
534 pxor \TMP1, %xmm\index
535 movdqu %xmm\index, (%arg2 , %r11, 1)
536 # write back plaintext/ciphertext for num_initial_blocks
537 add $16, %r11
539 movdqa SHUF_MASK(%rip), %xmm14
540 PSHUFB_XMM %xmm14, %xmm\index
542 # prepare plaintext/ciphertext for GHASH computation
543 .endr
544 .endif
545 GHASH_MUL %xmm\i, \TMP3, \TMP1, \TMP2, \TMP4, \TMP5, \XMM1
546 # apply GHASH on num_initial_blocks blocks
548 .if \i == 5
549 pxor %xmm5, %xmm6
550 GHASH_MUL %xmm6, \TMP3, \TMP1, \TMP2, \TMP4, \TMP5, \XMM1
551 pxor %xmm6, %xmm7
552 GHASH_MUL %xmm7, \TMP3, \TMP1, \TMP2, \TMP4, \TMP5, \XMM1
553 pxor %xmm7, %xmm8
554 GHASH_MUL %xmm8, \TMP3, \TMP1, \TMP2, \TMP4, \TMP5, \XMM1
555 .elseif \i == 6
556 pxor %xmm6, %xmm7
557 GHASH_MUL %xmm7, \TMP3, \TMP1, \TMP2, \TMP4, \TMP5, \XMM1
558 pxor %xmm7, %xmm8
559 GHASH_MUL %xmm8, \TMP3, \TMP1, \TMP2, \TMP4, \TMP5, \XMM1
560 .elseif \i == 7
561 pxor %xmm7, %xmm8
562 GHASH_MUL %xmm8, \TMP3, \TMP1, \TMP2, \TMP4, \TMP5, \XMM1
563 .endif
564 cmp $64, %r13
565 jl _initial_blocks_done\num_initial_blocks\operation
566 # no need for precomputed values
567 /*
568 *
569 * Precomputations for HashKey parallel with encryption of first 4 blocks.
570 * Haskey_i_k holds XORed values of the low and high parts of the Haskey_i
571 */
572 paddd ONE(%rip), \XMM0 # INCR Y0
573 movdqa \XMM0, \XMM1
574 movdqa SHUF_MASK(%rip), %xmm14
575 PSHUFB_XMM %xmm14, \XMM1 # perform a 16 byte swap
577 paddd ONE(%rip), \XMM0 # INCR Y0
578 movdqa \XMM0, \XMM2
579 movdqa SHUF_MASK(%rip), %xmm14
580 PSHUFB_XMM %xmm14, \XMM2 # perform a 16 byte swap
582 paddd ONE(%rip), \XMM0 # INCR Y0
583 movdqa \XMM0, \XMM3
584 movdqa SHUF_MASK(%rip), %xmm14
585 PSHUFB_XMM %xmm14, \XMM3 # perform a 16 byte swap
587 paddd ONE(%rip), \XMM0 # INCR Y0
588 movdqa \XMM0, \XMM4
589 movdqa SHUF_MASK(%rip), %xmm14
590 PSHUFB_XMM %xmm14, \XMM4 # perform a 16 byte swap
592 pxor 16*0(%arg1), \XMM1
593 pxor 16*0(%arg1), \XMM2
594 pxor 16*0(%arg1), \XMM3
595 pxor 16*0(%arg1), \XMM4
596 movdqa \TMP3, \TMP5
597 pshufd $78, \TMP3, \TMP1
598 pxor \TMP3, \TMP1
599 movdqa \TMP1, HashKey_k(%rsp)
600 GHASH_MUL \TMP5, \TMP3, \TMP1, \TMP2, \TMP4, \TMP6, \TMP7
601 # TMP5 = HashKey^2<<1 (mod poly)
602 movdqa \TMP5, HashKey_2(%rsp)
603 # HashKey_2 = HashKey^2<<1 (mod poly)
604 pshufd $78, \TMP5, \TMP1
605 pxor \TMP5, \TMP1
606 movdqa \TMP1, HashKey_2_k(%rsp)
607 .irpc index, 1234 # do 4 rounds
608 movaps 0x10*\index(%arg1), \TMP1
609 AESENC \TMP1, \XMM1
610 AESENC \TMP1, \XMM2
611 AESENC \TMP1, \XMM3
612 AESENC \TMP1, \XMM4
613 .endr
614 GHASH_MUL \TMP5, \TMP3, \TMP1, \TMP2, \TMP4, \TMP6, \TMP7
615 # TMP5 = HashKey^3<<1 (mod poly)
616 movdqa \TMP5, HashKey_3(%rsp)
617 pshufd $78, \TMP5, \TMP1
618 pxor \TMP5, \TMP1
619 movdqa \TMP1, HashKey_3_k(%rsp)
620 .irpc index, 56789 # do next 5 rounds
621 movaps 0x10*\index(%arg1), \TMP1
622 AESENC \TMP1, \XMM1
623 AESENC \TMP1, \XMM2
624 AESENC \TMP1, \XMM3
625 AESENC \TMP1, \XMM4
626 .endr
627 GHASH_MUL \TMP5, \TMP3, \TMP1, \TMP2, \TMP4, \TMP6, \TMP7
628 # TMP5 = HashKey^3<<1 (mod poly)
629 movdqa \TMP5, HashKey_4(%rsp)
630 pshufd $78, \TMP5, \TMP1
631 pxor \TMP5, \TMP1
632 movdqa \TMP1, HashKey_4_k(%rsp)
633 movaps 0xa0(%arg1), \TMP2
634 AESENCLAST \TMP2, \XMM1
635 AESENCLAST \TMP2, \XMM2
636 AESENCLAST \TMP2, \XMM3
637 AESENCLAST \TMP2, \XMM4
638 movdqu 16*0(%arg3 , %r11 , 1), \TMP1
639 pxor \TMP1, \XMM1
640 movdqu 16*1(%arg3 , %r11 , 1), \TMP1
641 pxor \TMP1, \XMM2
642 movdqu 16*2(%arg3 , %r11 , 1), \TMP1
643 pxor \TMP1, \XMM3
644 movdqu 16*3(%arg3 , %r11 , 1), \TMP1
645 pxor \TMP1, \XMM4
646 movdqu \XMM1, 16*0(%arg2 , %r11 , 1)
647 movdqu \XMM2, 16*1(%arg2 , %r11 , 1)
648 movdqu \XMM3, 16*2(%arg2 , %r11 , 1)
649 movdqu \XMM4, 16*3(%arg2 , %r11 , 1)
651 add $64, %r11
652 movdqa SHUF_MASK(%rip), %xmm14
653 PSHUFB_XMM %xmm14, \XMM1 # perform a 16 byte swap
654 pxor \XMMDst, \XMM1
655 # combine GHASHed value with the corresponding ciphertext
656 movdqa SHUF_MASK(%rip), %xmm14
657 PSHUFB_XMM %xmm14, \XMM2 # perform a 16 byte swap
658 movdqa SHUF_MASK(%rip), %xmm14
659 PSHUFB_XMM %xmm14, \XMM3 # perform a 16 byte swap
660 movdqa SHUF_MASK(%rip), %xmm14
661 PSHUFB_XMM %xmm14, \XMM4 # perform a 16 byte swap
663 _initial_blocks_done\num_initial_blocks\operation:
665 .endm
667 /*
668 * encrypt 4 blocks at a time
669 * ghash the 4 previously encrypted ciphertext blocks
670 * arg1, %arg2, %arg3 are used as pointers only, not modified
671 * %r11 is the data offset value
672 */
673 .macro GHASH_4_ENCRYPT_4_PARALLEL_ENC TMP1 TMP2 TMP3 TMP4 TMP5 \
674 TMP6 XMM0 XMM1 XMM2 XMM3 XMM4 XMM5 XMM6 XMM7 XMM8 operation
676 movdqa \XMM1, \XMM5
677 movdqa \XMM2, \XMM6
678 movdqa \XMM3, \XMM7
679 movdqa \XMM4, \XMM8
681 movdqa SHUF_MASK(%rip), %xmm15
682 # multiply TMP5 * HashKey using karatsuba
684 movdqa \XMM5, \TMP4
685 pshufd $78, \XMM5, \TMP6
686 pxor \XMM5, \TMP6
687 paddd ONE(%rip), \XMM0 # INCR CNT
688 movdqa HashKey_4(%rsp), \TMP5
689 PCLMULQDQ 0x11, \TMP5, \TMP4 # TMP4 = a1*b1
690 movdqa \XMM0, \XMM1
691 paddd ONE(%rip), \XMM0 # INCR CNT
692 movdqa \XMM0, \XMM2
693 paddd ONE(%rip), \XMM0 # INCR CNT
694 movdqa \XMM0, \XMM3
695 paddd ONE(%rip), \XMM0 # INCR CNT
696 movdqa \XMM0, \XMM4
697 PSHUFB_XMM %xmm15, \XMM1 # perform a 16 byte swap
698 PCLMULQDQ 0x00, \TMP5, \XMM5 # XMM5 = a0*b0
699 PSHUFB_XMM %xmm15, \XMM2 # perform a 16 byte swap
700 PSHUFB_XMM %xmm15, \XMM3 # perform a 16 byte swap
701 PSHUFB_XMM %xmm15, \XMM4 # perform a 16 byte swap
703 pxor (%arg1), \XMM1
704 pxor (%arg1), \XMM2
705 pxor (%arg1), \XMM3
706 pxor (%arg1), \XMM4
707 movdqa HashKey_4_k(%rsp), \TMP5
708 PCLMULQDQ 0x00, \TMP5, \TMP6 # TMP6 = (a1+a0)*(b1+b0)
709 movaps 0x10(%arg1), \TMP1
710 AESENC \TMP1, \XMM1 # Round 1
711 AESENC \TMP1, \XMM2
712 AESENC \TMP1, \XMM3
713 AESENC \TMP1, \XMM4
714 movaps 0x20(%arg1), \TMP1
715 AESENC \TMP1, \XMM1 # Round 2
716 AESENC \TMP1, \XMM2
717 AESENC \TMP1, \XMM3
718 AESENC \TMP1, \XMM4
719 movdqa \XMM6, \TMP1
720 pshufd $78, \XMM6, \TMP2
721 pxor \XMM6, \TMP2
722 movdqa HashKey_3(%rsp), \TMP5
723 PCLMULQDQ 0x11, \TMP5, \TMP1 # TMP1 = a1 * b1
724 movaps 0x30(%arg1), \TMP3
725 AESENC \TMP3, \XMM1 # Round 3
726 AESENC \TMP3, \XMM2
727 AESENC \TMP3, \XMM3
728 AESENC \TMP3, \XMM4
729 PCLMULQDQ 0x00, \TMP5, \XMM6 # XMM6 = a0*b0
730 movaps 0x40(%arg1), \TMP3
731 AESENC \TMP3, \XMM1 # Round 4
732 AESENC \TMP3, \XMM2
733 AESENC \TMP3, \XMM3
734 AESENC \TMP3, \XMM4
735 movdqa HashKey_3_k(%rsp), \TMP5
736 PCLMULQDQ 0x00, \TMP5, \TMP2 # TMP2 = (a1+a0)*(b1+b0)
737 movaps 0x50(%arg1), \TMP3
738 AESENC \TMP3, \XMM1 # Round 5
739 AESENC \TMP3, \XMM2
740 AESENC \TMP3, \XMM3
741 AESENC \TMP3, \XMM4
742 pxor \TMP1, \TMP4
743 # accumulate the results in TMP4:XMM5, TMP6 holds the middle part
744 pxor \XMM6, \XMM5
745 pxor \TMP2, \TMP6
746 movdqa \XMM7, \TMP1
747 pshufd $78, \XMM7, \TMP2
748 pxor \XMM7, \TMP2
749 movdqa HashKey_2(%rsp ), \TMP5
751 # Multiply TMP5 * HashKey using karatsuba
753 PCLMULQDQ 0x11, \TMP5, \TMP1 # TMP1 = a1*b1
754 movaps 0x60(%arg1), \TMP3
755 AESENC \TMP3, \XMM1 # Round 6
756 AESENC \TMP3, \XMM2
757 AESENC \TMP3, \XMM3
758 AESENC \TMP3, \XMM4
759 PCLMULQDQ 0x00, \TMP5, \XMM7 # XMM7 = a0*b0
760 movaps 0x70(%arg1), \TMP3
761 AESENC \TMP3, \XMM1 # Round 7
762 AESENC \TMP3, \XMM2
763 AESENC \TMP3, \XMM3
764 AESENC \TMP3, \XMM4
765 movdqa HashKey_2_k(%rsp), \TMP5
766 PCLMULQDQ 0x00, \TMP5, \TMP2 # TMP2 = (a1+a0)*(b1+b0)
767 movaps 0x80(%arg1), \TMP3
768 AESENC \TMP3, \XMM1 # Round 8
769 AESENC \TMP3, \XMM2
770 AESENC \TMP3, \XMM3
771 AESENC \TMP3, \XMM4
772 pxor \TMP1, \TMP4
773 # accumulate the results in TMP4:XMM5, TMP6 holds the middle part
774 pxor \XMM7, \XMM5
775 pxor \TMP2, \TMP6
777 # Multiply XMM8 * HashKey
778 # XMM8 and TMP5 hold the values for the two operands
780 movdqa \XMM8, \TMP1
781 pshufd $78, \XMM8, \TMP2
782 pxor \XMM8, \TMP2
783 movdqa HashKey(%rsp), \TMP5
784 PCLMULQDQ 0x11, \TMP5, \TMP1 # TMP1 = a1*b1
785 movaps 0x90(%arg1), \TMP3
786 AESENC \TMP3, \XMM1 # Round 9
787 AESENC \TMP3, \XMM2
788 AESENC \TMP3, \XMM3
789 AESENC \TMP3, \XMM4
790 PCLMULQDQ 0x00, \TMP5, \XMM8 # XMM8 = a0*b0
791 movaps 0xa0(%arg1), \TMP3
792 AESENCLAST \TMP3, \XMM1 # Round 10
793 AESENCLAST \TMP3, \XMM2
794 AESENCLAST \TMP3, \XMM3
795 AESENCLAST \TMP3, \XMM4
796 movdqa HashKey_k(%rsp), \TMP5
797 PCLMULQDQ 0x00, \TMP5, \TMP2 # TMP2 = (a1+a0)*(b1+b0)
798 movdqu (%arg3,%r11,1), \TMP3
799 pxor \TMP3, \XMM1 # Ciphertext/Plaintext XOR EK
800 movdqu 16(%arg3,%r11,1), \TMP3
801 pxor \TMP3, \XMM2 # Ciphertext/Plaintext XOR EK
802 movdqu 32(%arg3,%r11,1), \TMP3
803 pxor \TMP3, \XMM3 # Ciphertext/Plaintext XOR EK
804 movdqu 48(%arg3,%r11,1), \TMP3
805 pxor \TMP3, \XMM4 # Ciphertext/Plaintext XOR EK
806 movdqu \XMM1, (%arg2,%r11,1) # Write to the ciphertext buffer
807 movdqu \XMM2, 16(%arg2,%r11,1) # Write to the ciphertext buffer
808 movdqu \XMM3, 32(%arg2,%r11,1) # Write to the ciphertext buffer
809 movdqu \XMM4, 48(%arg2,%r11,1) # Write to the ciphertext buffer
810 PSHUFB_XMM %xmm15, \XMM1 # perform a 16 byte swap
811 PSHUFB_XMM %xmm15, \XMM2 # perform a 16 byte swap
812 PSHUFB_XMM %xmm15, \XMM3 # perform a 16 byte swap
813 PSHUFB_XMM %xmm15, \XMM4 # perform a 16 byte swap
815 pxor \TMP4, \TMP1
816 pxor \XMM8, \XMM5
817 pxor \TMP6, \TMP2
818 pxor \TMP1, \TMP2
819 pxor \XMM5, \TMP2
820 movdqa \TMP2, \TMP3
821 pslldq $8, \TMP3 # left shift TMP3 2 DWs
822 psrldq $8, \TMP2 # right shift TMP2 2 DWs
823 pxor \TMP3, \XMM5
824 pxor \TMP2, \TMP1 # accumulate the results in TMP1:XMM5
826 # first phase of reduction
828 movdqa \XMM5, \TMP2
829 movdqa \XMM5, \TMP3
830 movdqa \XMM5, \TMP4
831 # move XMM5 into TMP2, TMP3, TMP4 in order to perform shifts independently
832 pslld $31, \TMP2 # packed right shift << 31
833 pslld $30, \TMP3 # packed right shift << 30
834 pslld $25, \TMP4 # packed right shift << 25
835 pxor \TMP3, \TMP2 # xor the shifted versions
836 pxor \TMP4, \TMP2
837 movdqa \TMP2, \TMP5
838 psrldq $4, \TMP5 # right shift T5 1 DW
839 pslldq $12, \TMP2 # left shift T2 3 DWs
840 pxor \TMP2, \XMM5
842 # second phase of reduction
844 movdqa \XMM5,\TMP2 # make 3 copies of XMM5 into TMP2, TMP3, TMP4
845 movdqa \XMM5,\TMP3
846 movdqa \XMM5,\TMP4
847 psrld $1, \TMP2 # packed left shift >>1
848 psrld $2, \TMP3 # packed left shift >>2
849 psrld $7, \TMP4 # packed left shift >>7
850 pxor \TMP3,\TMP2 # xor the shifted versions
851 pxor \TMP4,\TMP2
852 pxor \TMP5, \TMP2
853 pxor \TMP2, \XMM5
854 pxor \TMP1, \XMM5 # result is in TMP1
856 pxor \XMM5, \XMM1
857 .endm
859 /*
860 * decrypt 4 blocks at a time
861 * ghash the 4 previously decrypted ciphertext blocks
862 * arg1, %arg2, %arg3 are used as pointers only, not modified
863 * %r11 is the data offset value
864 */
865 .macro GHASH_4_ENCRYPT_4_PARALLEL_DEC TMP1 TMP2 TMP3 TMP4 TMP5 \
866 TMP6 XMM0 XMM1 XMM2 XMM3 XMM4 XMM5 XMM6 XMM7 XMM8 operation
868 movdqa \XMM1, \XMM5
869 movdqa \XMM2, \XMM6
870 movdqa \XMM3, \XMM7
871 movdqa \XMM4, \XMM8
873 movdqa SHUF_MASK(%rip), %xmm15
874 # multiply TMP5 * HashKey using karatsuba
876 movdqa \XMM5, \TMP4
877 pshufd $78, \XMM5, \TMP6
878 pxor \XMM5, \TMP6
879 paddd ONE(%rip), \XMM0 # INCR CNT
880 movdqa HashKey_4(%rsp), \TMP5
881 PCLMULQDQ 0x11, \TMP5, \TMP4 # TMP4 = a1*b1
882 movdqa \XMM0, \XMM1
883 paddd ONE(%rip), \XMM0 # INCR CNT
884 movdqa \XMM0, \XMM2
885 paddd ONE(%rip), \XMM0 # INCR CNT
886 movdqa \XMM0, \XMM3
887 paddd ONE(%rip), \XMM0 # INCR CNT
888 movdqa \XMM0, \XMM4
889 PSHUFB_XMM %xmm15, \XMM1 # perform a 16 byte swap
890 PCLMULQDQ 0x00, \TMP5, \XMM5 # XMM5 = a0*b0
891 PSHUFB_XMM %xmm15, \XMM2 # perform a 16 byte swap
892 PSHUFB_XMM %xmm15, \XMM3 # perform a 16 byte swap
893 PSHUFB_XMM %xmm15, \XMM4 # perform a 16 byte swap
895 pxor (%arg1), \XMM1
896 pxor (%arg1), \XMM2
897 pxor (%arg1), \XMM3
898 pxor (%arg1), \XMM4
899 movdqa HashKey_4_k(%rsp), \TMP5
900 PCLMULQDQ 0x00, \TMP5, \TMP6 # TMP6 = (a1+a0)*(b1+b0)
901 movaps 0x10(%arg1), \TMP1
902 AESENC \TMP1, \XMM1 # Round 1
903 AESENC \TMP1, \XMM2
904 AESENC \TMP1, \XMM3
905 AESENC \TMP1, \XMM4
906 movaps 0x20(%arg1), \TMP1
907 AESENC \TMP1, \XMM1 # Round 2
908 AESENC \TMP1, \XMM2
909 AESENC \TMP1, \XMM3
910 AESENC \TMP1, \XMM4
911 movdqa \XMM6, \TMP1
912 pshufd $78, \XMM6, \TMP2
913 pxor \XMM6, \TMP2
914 movdqa HashKey_3(%rsp), \TMP5
915 PCLMULQDQ 0x11, \TMP5, \TMP1 # TMP1 = a1 * b1
916 movaps 0x30(%arg1), \TMP3
917 AESENC \TMP3, \XMM1 # Round 3
918 AESENC \TMP3, \XMM2
919 AESENC \TMP3, \XMM3
920 AESENC \TMP3, \XMM4
921 PCLMULQDQ 0x00, \TMP5, \XMM6 # XMM6 = a0*b0
922 movaps 0x40(%arg1), \TMP3
923 AESENC \TMP3, \XMM1 # Round 4
924 AESENC \TMP3, \XMM2
925 AESENC \TMP3, \XMM3
926 AESENC \TMP3, \XMM4
927 movdqa HashKey_3_k(%rsp), \TMP5
928 PCLMULQDQ 0x00, \TMP5, \TMP2 # TMP2 = (a1+a0)*(b1+b0)
929 movaps 0x50(%arg1), \TMP3
930 AESENC \TMP3, \XMM1 # Round 5
931 AESENC \TMP3, \XMM2
932 AESENC \TMP3, \XMM3
933 AESENC \TMP3, \XMM4
934 pxor \TMP1, \TMP4
935 # accumulate the results in TMP4:XMM5, TMP6 holds the middle part
936 pxor \XMM6, \XMM5
937 pxor \TMP2, \TMP6
938 movdqa \XMM7, \TMP1
939 pshufd $78, \XMM7, \TMP2
940 pxor \XMM7, \TMP2
941 movdqa HashKey_2(%rsp ), \TMP5
943 # Multiply TMP5 * HashKey using karatsuba
945 PCLMULQDQ 0x11, \TMP5, \TMP1 # TMP1 = a1*b1
946 movaps 0x60(%arg1), \TMP3
947 AESENC \TMP3, \XMM1 # Round 6
948 AESENC \TMP3, \XMM2
949 AESENC \TMP3, \XMM3
950 AESENC \TMP3, \XMM4
951 PCLMULQDQ 0x00, \TMP5, \XMM7 # XMM7 = a0*b0
952 movaps 0x70(%arg1), \TMP3
953 AESENC \TMP3, \XMM1 # Round 7
954 AESENC \TMP3, \XMM2
955 AESENC \TMP3, \XMM3
956 AESENC \TMP3, \XMM4
957 movdqa HashKey_2_k(%rsp), \TMP5
958 PCLMULQDQ 0x00, \TMP5, \TMP2 # TMP2 = (a1+a0)*(b1+b0)
959 movaps 0x80(%arg1), \TMP3
960 AESENC \TMP3, \XMM1 # Round 8
961 AESENC \TMP3, \XMM2
962 AESENC \TMP3, \XMM3
963 AESENC \TMP3, \XMM4
964 pxor \TMP1, \TMP4
965 # accumulate the results in TMP4:XMM5, TMP6 holds the middle part
966 pxor \XMM7, \XMM5
967 pxor \TMP2, \TMP6
969 # Multiply XMM8 * HashKey
970 # XMM8 and TMP5 hold the values for the two operands
972 movdqa \XMM8, \TMP1
973 pshufd $78, \XMM8, \TMP2
974 pxor \XMM8, \TMP2
975 movdqa HashKey(%rsp), \TMP5
976 PCLMULQDQ 0x11, \TMP5, \TMP1 # TMP1 = a1*b1
977 movaps 0x90(%arg1), \TMP3
978 AESENC \TMP3, \XMM1 # Round 9
979 AESENC \TMP3, \XMM2
980 AESENC \TMP3, \XMM3
981 AESENC \TMP3, \XMM4
982 PCLMULQDQ 0x00, \TMP5, \XMM8 # XMM8 = a0*b0
983 movaps 0xa0(%arg1), \TMP3
984 AESENCLAST \TMP3, \XMM1 # Round 10
985 AESENCLAST \TMP3, \XMM2
986 AESENCLAST \TMP3, \XMM3
987 AESENCLAST \TMP3, \XMM4
988 movdqa HashKey_k(%rsp), \TMP5
989 PCLMULQDQ 0x00, \TMP5, \TMP2 # TMP2 = (a1+a0)*(b1+b0)
990 movdqu (%arg3,%r11,1), \TMP3
991 pxor \TMP3, \XMM1 # Ciphertext/Plaintext XOR EK
992 movdqu \XMM1, (%arg2,%r11,1) # Write to plaintext buffer
993 movdqa \TMP3, \XMM1
994 movdqu 16(%arg3,%r11,1), \TMP3
995 pxor \TMP3, \XMM2 # Ciphertext/Plaintext XOR EK
996 movdqu \XMM2, 16(%arg2,%r11,1) # Write to plaintext buffer
997 movdqa \TMP3, \XMM2
998 movdqu 32(%arg3,%r11,1), \TMP3
999 pxor \TMP3, \XMM3 # Ciphertext/Plaintext XOR EK
1000 movdqu \XMM3, 32(%arg2,%r11,1) # Write to plaintext buffer
1001 movdqa \TMP3, \XMM3
1002 movdqu 48(%arg3,%r11,1), \TMP3
1003 pxor \TMP3, \XMM4 # Ciphertext/Plaintext XOR EK
1004 movdqu \XMM4, 48(%arg2,%r11,1) # Write to plaintext buffer
1005 movdqa \TMP3, \XMM4
1006 PSHUFB_XMM %xmm15, \XMM1 # perform a 16 byte swap
1007 PSHUFB_XMM %xmm15, \XMM2 # perform a 16 byte swap
1008 PSHUFB_XMM %xmm15, \XMM3 # perform a 16 byte swap
1009 PSHUFB_XMM %xmm15, \XMM4 # perform a 16 byte swap
1011 pxor \TMP4, \TMP1
1012 pxor \XMM8, \XMM5
1013 pxor \TMP6, \TMP2
1014 pxor \TMP1, \TMP2
1015 pxor \XMM5, \TMP2
1016 movdqa \TMP2, \TMP3
1017 pslldq $8, \TMP3 # left shift TMP3 2 DWs
1018 psrldq $8, \TMP2 # right shift TMP2 2 DWs
1019 pxor \TMP3, \XMM5
1020 pxor \TMP2, \TMP1 # accumulate the results in TMP1:XMM5
1022 # first phase of reduction
1024 movdqa \XMM5, \TMP2
1025 movdqa \XMM5, \TMP3
1026 movdqa \XMM5, \TMP4
1027 # move XMM5 into TMP2, TMP3, TMP4 in order to perform shifts independently
1028 pslld $31, \TMP2 # packed right shift << 31
1029 pslld $30, \TMP3 # packed right shift << 30
1030 pslld $25, \TMP4 # packed right shift << 25
1031 pxor \TMP3, \TMP2 # xor the shifted versions
1032 pxor \TMP4, \TMP2
1033 movdqa \TMP2, \TMP5
1034 psrldq $4, \TMP5 # right shift T5 1 DW
1035 pslldq $12, \TMP2 # left shift T2 3 DWs
1036 pxor \TMP2, \XMM5
1038 # second phase of reduction
1040 movdqa \XMM5,\TMP2 # make 3 copies of XMM5 into TMP2, TMP3, TMP4
1041 movdqa \XMM5,\TMP3
1042 movdqa \XMM5,\TMP4
1043 psrld $1, \TMP2 # packed left shift >>1
1044 psrld $2, \TMP3 # packed left shift >>2
1045 psrld $7, \TMP4 # packed left shift >>7
1046 pxor \TMP3,\TMP2 # xor the shifted versions
1047 pxor \TMP4,\TMP2
1048 pxor \TMP5, \TMP2
1049 pxor \TMP2, \XMM5
1050 pxor \TMP1, \XMM5 # result is in TMP1
1052 pxor \XMM5, \XMM1
1053 .endm
1055 /* GHASH the last 4 ciphertext blocks. */
1056 .macro GHASH_LAST_4 TMP1 TMP2 TMP3 TMP4 TMP5 TMP6 \
1057 TMP7 XMM1 XMM2 XMM3 XMM4 XMMDst
1059 # Multiply TMP6 * HashKey (using Karatsuba)
1061 movdqa \XMM1, \TMP6
1062 pshufd $78, \XMM1, \TMP2
1063 pxor \XMM1, \TMP2
1064 movdqa HashKey_4(%rsp), \TMP5
1065 PCLMULQDQ 0x11, \TMP5, \TMP6 # TMP6 = a1*b1
1066 PCLMULQDQ 0x00, \TMP5, \XMM1 # XMM1 = a0*b0
1067 movdqa HashKey_4_k(%rsp), \TMP4
1068 PCLMULQDQ 0x00, \TMP4, \TMP2 # TMP2 = (a1+a0)*(b1+b0)
1069 movdqa \XMM1, \XMMDst
1070 movdqa \TMP2, \XMM1 # result in TMP6, XMMDst, XMM1
1072 # Multiply TMP1 * HashKey (using Karatsuba)
1074 movdqa \XMM2, \TMP1
1075 pshufd $78, \XMM2, \TMP2
1076 pxor \XMM2, \TMP2
1077 movdqa HashKey_3(%rsp), \TMP5
1078 PCLMULQDQ 0x11, \TMP5, \TMP1 # TMP1 = a1*b1
1079 PCLMULQDQ 0x00, \TMP5, \XMM2 # XMM2 = a0*b0
1080 movdqa HashKey_3_k(%rsp), \TMP4
1081 PCLMULQDQ 0x00, \TMP4, \TMP2 # TMP2 = (a1+a0)*(b1+b0)
1082 pxor \TMP1, \TMP6
1083 pxor \XMM2, \XMMDst
1084 pxor \TMP2, \XMM1
1085 # results accumulated in TMP6, XMMDst, XMM1
1087 # Multiply TMP1 * HashKey (using Karatsuba)
1089 movdqa \XMM3, \TMP1
1090 pshufd $78, \XMM3, \TMP2
1091 pxor \XMM3, \TMP2
1092 movdqa HashKey_2(%rsp), \TMP5
1093 PCLMULQDQ 0x11, \TMP5, \TMP1 # TMP1 = a1*b1
1094 PCLMULQDQ 0x00, \TMP5, \XMM3 # XMM3 = a0*b0
1095 movdqa HashKey_2_k(%rsp), \TMP4
1096 PCLMULQDQ 0x00, \TMP4, \TMP2 # TMP2 = (a1+a0)*(b1+b0)
1097 pxor \TMP1, \TMP6
1098 pxor \XMM3, \XMMDst
1099 pxor \TMP2, \XMM1 # results accumulated in TMP6, XMMDst, XMM1
1101 # Multiply TMP1 * HashKey (using Karatsuba)
1102 movdqa \XMM4, \TMP1
1103 pshufd $78, \XMM4, \TMP2
1104 pxor \XMM4, \TMP2
1105 movdqa HashKey(%rsp), \TMP5
1106 PCLMULQDQ 0x11, \TMP5, \TMP1 # TMP1 = a1*b1
1107 PCLMULQDQ 0x00, \TMP5, \XMM4 # XMM4 = a0*b0
1108 movdqa HashKey_k(%rsp), \TMP4
1109 PCLMULQDQ 0x00, \TMP4, \TMP2 # TMP2 = (a1+a0)*(b1+b0)
1110 pxor \TMP1, \TMP6
1111 pxor \XMM4, \XMMDst
1112 pxor \XMM1, \TMP2
1113 pxor \TMP6, \TMP2
1114 pxor \XMMDst, \TMP2
1115 # middle section of the temp results combined as in karatsuba algorithm
1116 movdqa \TMP2, \TMP4
1117 pslldq $8, \TMP4 # left shift TMP4 2 DWs
1118 psrldq $8, \TMP2 # right shift TMP2 2 DWs
1119 pxor \TMP4, \XMMDst
1120 pxor \TMP2, \TMP6
1121 # TMP6:XMMDst holds the result of the accumulated carry-less multiplications
1122 # first phase of the reduction
1123 movdqa \XMMDst, \TMP2
1124 movdqa \XMMDst, \TMP3
1125 movdqa \XMMDst, \TMP4
1126 # move XMMDst into TMP2, TMP3, TMP4 in order to perform 3 shifts independently
1127 pslld $31, \TMP2 # packed right shifting << 31
1128 pslld $30, \TMP3 # packed right shifting << 30
1129 pslld $25, \TMP4 # packed right shifting << 25
1130 pxor \TMP3, \TMP2 # xor the shifted versions
1131 pxor \TMP4, \TMP2
1132 movdqa \TMP2, \TMP7
1133 psrldq $4, \TMP7 # right shift TMP7 1 DW
1134 pslldq $12, \TMP2 # left shift TMP2 3 DWs
1135 pxor \TMP2, \XMMDst
1137 # second phase of the reduction
1138 movdqa \XMMDst, \TMP2
1139 # make 3 copies of XMMDst for doing 3 shift operations
1140 movdqa \XMMDst, \TMP3
1141 movdqa \XMMDst, \TMP4
1142 psrld $1, \TMP2 # packed left shift >> 1
1143 psrld $2, \TMP3 # packed left shift >> 2
1144 psrld $7, \TMP4 # packed left shift >> 7
1145 pxor \TMP3, \TMP2 # xor the shifted versions
1146 pxor \TMP4, \TMP2
1147 pxor \TMP7, \TMP2
1148 pxor \TMP2, \XMMDst
1149 pxor \TMP6, \XMMDst # reduced result is in XMMDst
1150 .endm
1152 /* Encryption of a single block done*/
1153 .macro ENCRYPT_SINGLE_BLOCK XMM0 TMP1
1155 pxor (%arg1), \XMM0
1156 movaps 16(%arg1), \TMP1
1157 AESENC \TMP1, \XMM0
1158 movaps 32(%arg1), \TMP1
1159 AESENC \TMP1, \XMM0
1160 movaps 48(%arg1), \TMP1
1161 AESENC \TMP1, \XMM0
1162 movaps 64(%arg1), \TMP1
1163 AESENC \TMP1, \XMM0
1164 movaps 80(%arg1), \TMP1
1165 AESENC \TMP1, \XMM0
1166 movaps 96(%arg1), \TMP1
1167 AESENC \TMP1, \XMM0
1168 movaps 112(%arg1), \TMP1
1169 AESENC \TMP1, \XMM0
1170 movaps 128(%arg1), \TMP1
1171 AESENC \TMP1, \XMM0
1172 movaps 144(%arg1), \TMP1
1173 AESENC \TMP1, \XMM0
1174 movaps 160(%arg1), \TMP1
1175 AESENCLAST \TMP1, \XMM0
1176 .endm
1179 /*****************************************************************************
1180 * void aesni_gcm_dec(void *aes_ctx, // AES Key schedule. Starts on a 16 byte boundary.
1181 * u8 *out, // Plaintext output. Encrypt in-place is allowed.
1182 * const u8 *in, // Ciphertext input
1183 * u64 plaintext_len, // Length of data in bytes for decryption.
1184 * u8 *iv, // Pre-counter block j0: 4 byte salt (from Security Association)
1185 * // concatenated with 8 byte Initialisation Vector (from IPSec ESP Payload)
1186 * // concatenated with 0x00000001. 16-byte aligned pointer.
1187 * u8 *hash_subkey, // H, the Hash sub key input. Data starts on a 16-byte boundary.
1188 * const u8 *aad, // Additional Authentication Data (AAD)
1189 * u64 aad_len, // Length of AAD in bytes. With RFC4106 this is going to be 8 or 12 bytes
1190 * u8 *auth_tag, // Authenticated Tag output. The driver will compare this to the
1191 * // given authentication tag and only return the plaintext if they match.
1192 * u64 auth_tag_len); // Authenticated Tag Length in bytes. Valid values are 16
1193 * // (most likely), 12 or 8.
1194 *
1195 * Assumptions:
1196 *
1197 * keys:
1198 * keys are pre-expanded and aligned to 16 bytes. we are using the first
1199 * set of 11 keys in the data structure void *aes_ctx
1200 *
1201 * iv:
1202 * 0 1 2 3
1203 * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
1204 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
1205 * | Salt (From the SA) |
1206 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
1207 * | Initialization Vector |
1208 * | (This is the sequence number from IPSec header) |
1209 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
1210 * | 0x1 |
1211 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
1212 *
1213 *
1214 *
1215 * AAD:
1216 * AAD padded to 128 bits with 0
1217 * for example, assume AAD is a u32 vector
1218 *
1219 * if AAD is 8 bytes:
1220 * AAD[3] = {A0, A1};
1221 * padded AAD in xmm register = {A1 A0 0 0}
1222 *
1223 * 0 1 2 3
1224 * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
1225 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
1226 * | SPI (A1) |
1227 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
1228 * | 32-bit Sequence Number (A0) |
1229 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
1230 * | 0x0 |
1231 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
1232 *
1233 * AAD Format with 32-bit Sequence Number
1234 *
1235 * if AAD is 12 bytes:
1236 * AAD[3] = {A0, A1, A2};
1237 * padded AAD in xmm register = {A2 A1 A0 0}
1238 *
1239 * 0 1 2 3
1240 * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
1241 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
1242 * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
1243 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
1244 * | SPI (A2) |
1245 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
1246 * | 64-bit Extended Sequence Number {A1,A0} |
1247 * | |
1248 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
1249 * | 0x0 |
1250 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
1251 *
1252 * AAD Format with 64-bit Extended Sequence Number
1253 *
1254 * aadLen:
1255 * from the definition of the spec, aadLen can only be 8 or 12 bytes.
1256 * The code supports 16 too but for other sizes, the code will fail.
1257 *
1258 * TLen:
1259 * from the definition of the spec, TLen can only be 8, 12 or 16 bytes.
1260 * For other sizes, the code will fail.
1261 *
1262 * poly = x^128 + x^127 + x^126 + x^121 + 1
1263 *
1264 *****************************************************************************/
1266 ENTRY(aesni_gcm_dec)
1267 push %r12
1268 push %r13
1269 push %r14
1270 mov %rsp, %r14
1271 /*
1272 * states of %xmm registers %xmm6:%xmm15 not saved
1273 * all %xmm registers are clobbered
1274 */
1275 sub $VARIABLE_OFFSET, %rsp
1276 and $~63, %rsp # align rsp to 64 bytes
1277 mov %arg6, %r12
1278 movdqu (%r12), %xmm13 # %xmm13 = HashKey
1279 movdqa SHUF_MASK(%rip), %xmm2
1280 PSHUFB_XMM %xmm2, %xmm13
1283 # Precompute HashKey<<1 (mod poly) from the hash key (required for GHASH)
1285 movdqa %xmm13, %xmm2
1286 psllq $1, %xmm13
1287 psrlq $63, %xmm2
1288 movdqa %xmm2, %xmm1
1289 pslldq $8, %xmm2
1290 psrldq $8, %xmm1
1291 por %xmm2, %xmm13
1293 # Reduction
1295 pshufd $0x24, %xmm1, %xmm2
1296 pcmpeqd TWOONE(%rip), %xmm2
1297 pand POLY(%rip), %xmm2
1298 pxor %xmm2, %xmm13 # %xmm13 holds the HashKey<<1 (mod poly)
1301 # Decrypt first few blocks
1303 movdqa %xmm13, HashKey(%rsp) # store HashKey<<1 (mod poly)
1304 mov %arg4, %r13 # save the number of bytes of plaintext/ciphertext
1305 and $-16, %r13 # %r13 = %r13 - (%r13 mod 16)
1306 mov %r13, %r12
1307 and $(3<<4), %r12
1308 jz _initial_num_blocks_is_0_decrypt
1309 cmp $(2<<4), %r12
1310 jb _initial_num_blocks_is_1_decrypt
1311 je _initial_num_blocks_is_2_decrypt
1312 _initial_num_blocks_is_3_decrypt:
1313 INITIAL_BLOCKS_DEC 3, %xmm9, %xmm10, %xmm13, %xmm11, %xmm12, %xmm0, \
1314 %xmm1, %xmm2, %xmm3, %xmm4, %xmm8, %xmm5, %xmm6, 5, 678, dec
1315 sub $48, %r13
1316 jmp _initial_blocks_decrypted
1317 _initial_num_blocks_is_2_decrypt:
1318 INITIAL_BLOCKS_DEC 2, %xmm9, %xmm10, %xmm13, %xmm11, %xmm12, %xmm0, \
1319 %xmm1, %xmm2, %xmm3, %xmm4, %xmm8, %xmm5, %xmm6, 6, 78, dec
1320 sub $32, %r13
1321 jmp _initial_blocks_decrypted
1322 _initial_num_blocks_is_1_decrypt:
1323 INITIAL_BLOCKS_DEC 1, %xmm9, %xmm10, %xmm13, %xmm11, %xmm12, %xmm0, \
1324 %xmm1, %xmm2, %xmm3, %xmm4, %xmm8, %xmm5, %xmm6, 7, 8, dec
1325 sub $16, %r13
1326 jmp _initial_blocks_decrypted
1327 _initial_num_blocks_is_0_decrypt:
1328 INITIAL_BLOCKS_DEC 0, %xmm9, %xmm10, %xmm13, %xmm11, %xmm12, %xmm0, \
1329 %xmm1, %xmm2, %xmm3, %xmm4, %xmm8, %xmm5, %xmm6, 8, 0, dec
1330 _initial_blocks_decrypted:
1331 cmp $0, %r13
1332 je _zero_cipher_left_decrypt
1333 sub $64, %r13
1334 je _four_cipher_left_decrypt
1335 _decrypt_by_4:
1336 GHASH_4_ENCRYPT_4_PARALLEL_DEC %xmm9, %xmm10, %xmm11, %xmm12, %xmm13, \
1337 %xmm14, %xmm0, %xmm1, %xmm2, %xmm3, %xmm4, %xmm5, %xmm6, %xmm7, %xmm8, dec
1338 add $64, %r11
1339 sub $64, %r13
1340 jne _decrypt_by_4
1341 _four_cipher_left_decrypt:
1342 GHASH_LAST_4 %xmm9, %xmm10, %xmm11, %xmm12, %xmm13, %xmm14, \
1343 %xmm15, %xmm1, %xmm2, %xmm3, %xmm4, %xmm8
1344 _zero_cipher_left_decrypt:
1345 mov %arg4, %r13
1346 and $15, %r13 # %r13 = arg4 (mod 16)
1347 je _multiple_of_16_bytes_decrypt
1349 # Handle the last <16 byte block separately
1351 paddd ONE(%rip), %xmm0 # increment CNT to get Yn
1352 movdqa SHUF_MASK(%rip), %xmm10
1353 PSHUFB_XMM %xmm10, %xmm0
1355 ENCRYPT_SINGLE_BLOCK %xmm0, %xmm1 # E(K, Yn)
1356 sub $16, %r11
1357 add %r13, %r11
1358 movdqu (%arg3,%r11,1), %xmm1 # receive the last <16 byte block
1359 lea SHIFT_MASK+16(%rip), %r12
1360 sub %r13, %r12
1361 # adjust the shuffle mask pointer to be able to shift 16-%r13 bytes
1362 # (%r13 is the number of bytes in plaintext mod 16)
1363 movdqu (%r12), %xmm2 # get the appropriate shuffle mask
1364 PSHUFB_XMM %xmm2, %xmm1 # right shift 16-%r13 butes
1366 movdqa %xmm1, %xmm2
1367 pxor %xmm1, %xmm0 # Ciphertext XOR E(K, Yn)
1368 movdqu ALL_F-SHIFT_MASK(%r12), %xmm1
1369 # get the appropriate mask to mask out top 16-%r13 bytes of %xmm0
1370 pand %xmm1, %xmm0 # mask out top 16-%r13 bytes of %xmm0
1371 pand %xmm1, %xmm2
1372 movdqa SHUF_MASK(%rip), %xmm10
1373 PSHUFB_XMM %xmm10 ,%xmm2
1375 pxor %xmm2, %xmm8
1376 GHASH_MUL %xmm8, %xmm13, %xmm9, %xmm10, %xmm11, %xmm5, %xmm6
1377 # GHASH computation for the last <16 byte block
1378 sub %r13, %r11
1379 add $16, %r11
1381 # output %r13 bytes
1382 MOVQ_R64_XMM %xmm0, %rax
1383 cmp $8, %r13
1384 jle _less_than_8_bytes_left_decrypt
1385 mov %rax, (%arg2 , %r11, 1)
1386 add $8, %r11
1387 psrldq $8, %xmm0
1388 MOVQ_R64_XMM %xmm0, %rax
1389 sub $8, %r13
1390 _less_than_8_bytes_left_decrypt:
1391 mov %al, (%arg2, %r11, 1)
1392 add $1, %r11
1393 shr $8, %rax
1394 sub $1, %r13
1395 jne _less_than_8_bytes_left_decrypt
1396 _multiple_of_16_bytes_decrypt:
1397 mov arg8, %r12 # %r13 = aadLen (number of bytes)
1398 shl $3, %r12 # convert into number of bits
1399 movd %r12d, %xmm15 # len(A) in %xmm15
1400 shl $3, %arg4 # len(C) in bits (*128)
1401 MOVQ_R64_XMM %arg4, %xmm1
1402 pslldq $8, %xmm15 # %xmm15 = len(A)||0x0000000000000000
1403 pxor %xmm1, %xmm15 # %xmm15 = len(A)||len(C)
1404 pxor %xmm15, %xmm8
1405 GHASH_MUL %xmm8, %xmm13, %xmm9, %xmm10, %xmm11, %xmm5, %xmm6
1406 # final GHASH computation
1407 movdqa SHUF_MASK(%rip), %xmm10
1408 PSHUFB_XMM %xmm10, %xmm8
1410 mov %arg5, %rax # %rax = *Y0
1411 movdqu (%rax), %xmm0 # %xmm0 = Y0
1412 ENCRYPT_SINGLE_BLOCK %xmm0, %xmm1 # E(K, Y0)
1413 pxor %xmm8, %xmm0
1414 _return_T_decrypt:
1415 mov arg9, %r10 # %r10 = authTag
1416 mov arg10, %r11 # %r11 = auth_tag_len
1417 cmp $16, %r11
1418 je _T_16_decrypt
1419 cmp $12, %r11
1420 je _T_12_decrypt
1421 _T_8_decrypt:
1422 MOVQ_R64_XMM %xmm0, %rax
1423 mov %rax, (%r10)
1424 jmp _return_T_done_decrypt
1425 _T_12_decrypt:
1426 MOVQ_R64_XMM %xmm0, %rax
1427 mov %rax, (%r10)
1428 psrldq $8, %xmm0
1429 movd %xmm0, %eax
1430 mov %eax, 8(%r10)
1431 jmp _return_T_done_decrypt
1432 _T_16_decrypt:
1433 movdqu %xmm0, (%r10)
1434 _return_T_done_decrypt:
1435 mov %r14, %rsp
1436 pop %r14
1437 pop %r13
1438 pop %r12
1439 ret
1442 /*****************************************************************************
1443 * void aesni_gcm_enc(void *aes_ctx, // AES Key schedule. Starts on a 16 byte boundary.
1444 * u8 *out, // Ciphertext output. Encrypt in-place is allowed.
1445 * const u8 *in, // Plaintext input
1446 * u64 plaintext_len, // Length of data in bytes for encryption.
1447 * u8 *iv, // Pre-counter block j0: 4 byte salt (from Security Association)
1448 * // concatenated with 8 byte Initialisation Vector (from IPSec ESP Payload)
1449 * // concatenated with 0x00000001. 16-byte aligned pointer.
1450 * u8 *hash_subkey, // H, the Hash sub key input. Data starts on a 16-byte boundary.
1451 * const u8 *aad, // Additional Authentication Data (AAD)
1452 * u64 aad_len, // Length of AAD in bytes. With RFC4106 this is going to be 8 or 12 bytes
1453 * u8 *auth_tag, // Authenticated Tag output.
1454 * u64 auth_tag_len); // Authenticated Tag Length in bytes. Valid values are 16 (most likely),
1455 * // 12 or 8.
1456 *
1457 * Assumptions:
1458 *
1459 * keys:
1460 * keys are pre-expanded and aligned to 16 bytes. we are using the
1461 * first set of 11 keys in the data structure void *aes_ctx
1462 *
1463 *
1464 * iv:
1465 * 0 1 2 3
1466 * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
1467 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
1468 * | Salt (From the SA) |
1469 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
1470 * | Initialization Vector |
1471 * | (This is the sequence number from IPSec header) |
1472 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
1473 * | 0x1 |
1474 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
1475 *
1476 *
1477 *
1478 * AAD:
1479 * AAD padded to 128 bits with 0
1480 * for example, assume AAD is a u32 vector
1481 *
1482 * if AAD is 8 bytes:
1483 * AAD[3] = {A0, A1};
1484 * padded AAD in xmm register = {A1 A0 0 0}
1485 *
1486 * 0 1 2 3
1487 * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
1488 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
1489 * | SPI (A1) |
1490 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
1491 * | 32-bit Sequence Number (A0) |
1492 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
1493 * | 0x0 |
1494 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
1495 *
1496 * AAD Format with 32-bit Sequence Number
1497 *
1498 * if AAD is 12 bytes:
1499 * AAD[3] = {A0, A1, A2};
1500 * padded AAD in xmm register = {A2 A1 A0 0}
1501 *
1502 * 0 1 2 3
1503 * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
1504 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
1505 * | SPI (A2) |
1506 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
1507 * | 64-bit Extended Sequence Number {A1,A0} |
1508 * | |
1509 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
1510 * | 0x0 |
1511 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
1512 *
1513 * AAD Format with 64-bit Extended Sequence Number
1514 *
1515 * aadLen:
1516 * from the definition of the spec, aadLen can only be 8 or 12 bytes.
1517 * The code supports 16 too but for other sizes, the code will fail.
1518 *
1519 * TLen:
1520 * from the definition of the spec, TLen can only be 8, 12 or 16 bytes.
1521 * For other sizes, the code will fail.
1522 *
1523 * poly = x^128 + x^127 + x^126 + x^121 + 1
1524 ***************************************************************************/
1525 ENTRY(aesni_gcm_enc)
1526 push %r12
1527 push %r13
1528 push %r14
1529 mov %rsp, %r14
1530 #
1531 # states of %xmm registers %xmm6:%xmm15 not saved
1532 # all %xmm registers are clobbered
1533 #
1534 sub $VARIABLE_OFFSET, %rsp
1535 and $~63, %rsp
1536 mov %arg6, %r12
1537 movdqu (%r12), %xmm13
1538 movdqa SHUF_MASK(%rip), %xmm2
1539 PSHUFB_XMM %xmm2, %xmm13
1542 # precompute HashKey<<1 mod poly from the HashKey (required for GHASH)
1544 movdqa %xmm13, %xmm2
1545 psllq $1, %xmm13
1546 psrlq $63, %xmm2
1547 movdqa %xmm2, %xmm1
1548 pslldq $8, %xmm2
1549 psrldq $8, %xmm1
1550 por %xmm2, %xmm13
1552 # reduce HashKey<<1
1554 pshufd $0x24, %xmm1, %xmm2
1555 pcmpeqd TWOONE(%rip), %xmm2
1556 pand POLY(%rip), %xmm2
1557 pxor %xmm2, %xmm13
1558 movdqa %xmm13, HashKey(%rsp)
1559 mov %arg4, %r13 # %xmm13 holds HashKey<<1 (mod poly)
1560 and $-16, %r13
1561 mov %r13, %r12
1563 # Encrypt first few blocks
1565 and $(3<<4), %r12
1566 jz _initial_num_blocks_is_0_encrypt
1567 cmp $(2<<4), %r12
1568 jb _initial_num_blocks_is_1_encrypt
1569 je _initial_num_blocks_is_2_encrypt
1570 _initial_num_blocks_is_3_encrypt:
1571 INITIAL_BLOCKS_ENC 3, %xmm9, %xmm10, %xmm13, %xmm11, %xmm12, %xmm0, \
1572 %xmm1, %xmm2, %xmm3, %xmm4, %xmm8, %xmm5, %xmm6, 5, 678, enc
1573 sub $48, %r13
1574 jmp _initial_blocks_encrypted
1575 _initial_num_blocks_is_2_encrypt:
1576 INITIAL_BLOCKS_ENC 2, %xmm9, %xmm10, %xmm13, %xmm11, %xmm12, %xmm0, \
1577 %xmm1, %xmm2, %xmm3, %xmm4, %xmm8, %xmm5, %xmm6, 6, 78, enc
1578 sub $32, %r13
1579 jmp _initial_blocks_encrypted
1580 _initial_num_blocks_is_1_encrypt:
1581 INITIAL_BLOCKS_ENC 1, %xmm9, %xmm10, %xmm13, %xmm11, %xmm12, %xmm0, \
1582 %xmm1, %xmm2, %xmm3, %xmm4, %xmm8, %xmm5, %xmm6, 7, 8, enc
1583 sub $16, %r13
1584 jmp _initial_blocks_encrypted
1585 _initial_num_blocks_is_0_encrypt:
1586 INITIAL_BLOCKS_ENC 0, %xmm9, %xmm10, %xmm13, %xmm11, %xmm12, %xmm0, \
1587 %xmm1, %xmm2, %xmm3, %xmm4, %xmm8, %xmm5, %xmm6, 8, 0, enc
1588 _initial_blocks_encrypted:
1590 # Main loop - Encrypt remaining blocks
1592 cmp $0, %r13
1593 je _zero_cipher_left_encrypt
1594 sub $64, %r13
1595 je _four_cipher_left_encrypt
1596 _encrypt_by_4_encrypt:
1597 GHASH_4_ENCRYPT_4_PARALLEL_ENC %xmm9, %xmm10, %xmm11, %xmm12, %xmm13, \
1598 %xmm14, %xmm0, %xmm1, %xmm2, %xmm3, %xmm4, %xmm5, %xmm6, %xmm7, %xmm8, enc
1599 add $64, %r11
1600 sub $64, %r13
1601 jne _encrypt_by_4_encrypt
1602 _four_cipher_left_encrypt:
1603 GHASH_LAST_4 %xmm9, %xmm10, %xmm11, %xmm12, %xmm13, %xmm14, \
1604 %xmm15, %xmm1, %xmm2, %xmm3, %xmm4, %xmm8
1605 _zero_cipher_left_encrypt:
1606 mov %arg4, %r13
1607 and $15, %r13 # %r13 = arg4 (mod 16)
1608 je _multiple_of_16_bytes_encrypt
1610 # Handle the last <16 Byte block separately
1611 paddd ONE(%rip), %xmm0 # INCR CNT to get Yn
1612 movdqa SHUF_MASK(%rip), %xmm10
1613 PSHUFB_XMM %xmm10, %xmm0
1616 ENCRYPT_SINGLE_BLOCK %xmm0, %xmm1 # Encrypt(K, Yn)
1617 sub $16, %r11
1618 add %r13, %r11
1619 movdqu (%arg3,%r11,1), %xmm1 # receive the last <16 byte blocks
1620 lea SHIFT_MASK+16(%rip), %r12
1621 sub %r13, %r12
1622 # adjust the shuffle mask pointer to be able to shift 16-r13 bytes
1623 # (%r13 is the number of bytes in plaintext mod 16)
1624 movdqu (%r12), %xmm2 # get the appropriate shuffle mask
1625 PSHUFB_XMM %xmm2, %xmm1 # shift right 16-r13 byte
1626 pxor %xmm1, %xmm0 # Plaintext XOR Encrypt(K, Yn)
1627 movdqu ALL_F-SHIFT_MASK(%r12), %xmm1
1628 # get the appropriate mask to mask out top 16-r13 bytes of xmm0
1629 pand %xmm1, %xmm0 # mask out top 16-r13 bytes of xmm0
1630 movdqa SHUF_MASK(%rip), %xmm10
1631 PSHUFB_XMM %xmm10,%xmm0
1633 pxor %xmm0, %xmm8
1634 GHASH_MUL %xmm8, %xmm13, %xmm9, %xmm10, %xmm11, %xmm5, %xmm6
1635 # GHASH computation for the last <16 byte block
1636 sub %r13, %r11
1637 add $16, %r11
1639 movdqa SHUF_MASK(%rip), %xmm10
1640 PSHUFB_XMM %xmm10, %xmm0
1642 # shuffle xmm0 back to output as ciphertext
1644 # Output %r13 bytes
1645 MOVQ_R64_XMM %xmm0, %rax
1646 cmp $8, %r13
1647 jle _less_than_8_bytes_left_encrypt
1648 mov %rax, (%arg2 , %r11, 1)
1649 add $8, %r11
1650 psrldq $8, %xmm0
1651 MOVQ_R64_XMM %xmm0, %rax
1652 sub $8, %r13
1653 _less_than_8_bytes_left_encrypt:
1654 mov %al, (%arg2, %r11, 1)
1655 add $1, %r11
1656 shr $8, %rax
1657 sub $1, %r13
1658 jne _less_than_8_bytes_left_encrypt
1659 _multiple_of_16_bytes_encrypt:
1660 mov arg8, %r12 # %r12 = addLen (number of bytes)
1661 shl $3, %r12
1662 movd %r12d, %xmm15 # len(A) in %xmm15
1663 shl $3, %arg4 # len(C) in bits (*128)
1664 MOVQ_R64_XMM %arg4, %xmm1
1665 pslldq $8, %xmm15 # %xmm15 = len(A)||0x0000000000000000
1666 pxor %xmm1, %xmm15 # %xmm15 = len(A)||len(C)
1667 pxor %xmm15, %xmm8
1668 GHASH_MUL %xmm8, %xmm13, %xmm9, %xmm10, %xmm11, %xmm5, %xmm6
1669 # final GHASH computation
1670 movdqa SHUF_MASK(%rip), %xmm10
1671 PSHUFB_XMM %xmm10, %xmm8 # perform a 16 byte swap
1673 mov %arg5, %rax # %rax = *Y0
1674 movdqu (%rax), %xmm0 # %xmm0 = Y0
1675 ENCRYPT_SINGLE_BLOCK %xmm0, %xmm15 # Encrypt(K, Y0)
1676 pxor %xmm8, %xmm0
1677 _return_T_encrypt:
1678 mov arg9, %r10 # %r10 = authTag
1679 mov arg10, %r11 # %r11 = auth_tag_len
1680 cmp $16, %r11
1681 je _T_16_encrypt
1682 cmp $12, %r11
1683 je _T_12_encrypt
1684 _T_8_encrypt:
1685 MOVQ_R64_XMM %xmm0, %rax
1686 mov %rax, (%r10)
1687 jmp _return_T_done_encrypt
1688 _T_12_encrypt:
1689 MOVQ_R64_XMM %xmm0, %rax
1690 mov %rax, (%r10)
1691 psrldq $8, %xmm0
1692 movd %xmm0, %eax
1693 mov %eax, 8(%r10)
1694 jmp _return_T_done_encrypt
1695 _T_16_encrypt:
1696 movdqu %xmm0, (%r10)
1697 _return_T_done_encrypt:
1698 mov %r14, %rsp
1699 pop %r14
1700 pop %r13
1701 pop %r12
1702 ret
1704 #endif
1707 _key_expansion_128:
1708 _key_expansion_256a:
1709 pshufd $0b11111111, %xmm1, %xmm1
1710 shufps $0b00010000, %xmm0, %xmm4
1711 pxor %xmm4, %xmm0
1712 shufps $0b10001100, %xmm0, %xmm4
1713 pxor %xmm4, %xmm0
1714 pxor %xmm1, %xmm0
1715 movaps %xmm0, (TKEYP)
1716 add $0x10, TKEYP
1717 ret
1719 .align 4
1720 _key_expansion_192a:
1721 pshufd $0b01010101, %xmm1, %xmm1
1722 shufps $0b00010000, %xmm0, %xmm4
1723 pxor %xmm4, %xmm0
1724 shufps $0b10001100, %xmm0, %xmm4
1725 pxor %xmm4, %xmm0
1726 pxor %xmm1, %xmm0
1728 movaps %xmm2, %xmm5
1729 movaps %xmm2, %xmm6
1730 pslldq $4, %xmm5
1731 pshufd $0b11111111, %xmm0, %xmm3
1732 pxor %xmm3, %xmm2
1733 pxor %xmm5, %xmm2
1735 movaps %xmm0, %xmm1
1736 shufps $0b01000100, %xmm0, %xmm6
1737 movaps %xmm6, (TKEYP)
1738 shufps $0b01001110, %xmm2, %xmm1
1739 movaps %xmm1, 0x10(TKEYP)
1740 add $0x20, TKEYP
1741 ret
1743 .align 4
1744 _key_expansion_192b:
1745 pshufd $0b01010101, %xmm1, %xmm1
1746 shufps $0b00010000, %xmm0, %xmm4
1747 pxor %xmm4, %xmm0
1748 shufps $0b10001100, %xmm0, %xmm4
1749 pxor %xmm4, %xmm0
1750 pxor %xmm1, %xmm0
1752 movaps %xmm2, %xmm5
1753 pslldq $4, %xmm5
1754 pshufd $0b11111111, %xmm0, %xmm3
1755 pxor %xmm3, %xmm2
1756 pxor %xmm5, %xmm2
1758 movaps %xmm0, (TKEYP)
1759 add $0x10, TKEYP
1760 ret
1762 .align 4
1763 _key_expansion_256b:
1764 pshufd $0b10101010, %xmm1, %xmm1
1765 shufps $0b00010000, %xmm2, %xmm4
1766 pxor %xmm4, %xmm2
1767 shufps $0b10001100, %xmm2, %xmm4
1768 pxor %xmm4, %xmm2
1769 pxor %xmm1, %xmm2
1770 movaps %xmm2, (TKEYP)
1771 add $0x10, TKEYP
1772 ret
1774 /*
1775 * int aesni_set_key(struct crypto_aes_ctx *ctx, const u8 *in_key,
1776 * unsigned int key_len)
1777 */
1778 ENTRY(aesni_set_key)
1779 #ifndef __x86_64__
1780 pushl KEYP
1781 movl 8(%esp), KEYP # ctx
1782 movl 12(%esp), UKEYP # in_key
1783 movl 16(%esp), %edx # key_len
1784 #endif
1785 movups (UKEYP), %xmm0 # user key (first 16 bytes)
1786 movaps %xmm0, (KEYP)
1787 lea 0x10(KEYP), TKEYP # key addr
1788 movl %edx, 480(KEYP)
1789 pxor %xmm4, %xmm4 # xmm4 is assumed 0 in _key_expansion_x
1790 cmp $24, %dl
1791 jb .Lenc_key128
1792 je .Lenc_key192
1793 movups 0x10(UKEYP), %xmm2 # other user key
1794 movaps %xmm2, (TKEYP)
1795 add $0x10, TKEYP
1796 AESKEYGENASSIST 0x1 %xmm2 %xmm1 # round 1
1797 call _key_expansion_256a
1798 AESKEYGENASSIST 0x1 %xmm0 %xmm1
1799 call _key_expansion_256b
1800 AESKEYGENASSIST 0x2 %xmm2 %xmm1 # round 2
1801 call _key_expansion_256a
1802 AESKEYGENASSIST 0x2 %xmm0 %xmm1
1803 call _key_expansion_256b
1804 AESKEYGENASSIST 0x4 %xmm2 %xmm1 # round 3
1805 call _key_expansion_256a
1806 AESKEYGENASSIST 0x4 %xmm0 %xmm1
1807 call _key_expansion_256b
1808 AESKEYGENASSIST 0x8 %xmm2 %xmm1 # round 4
1809 call _key_expansion_256a
1810 AESKEYGENASSIST 0x8 %xmm0 %xmm1
1811 call _key_expansion_256b
1812 AESKEYGENASSIST 0x10 %xmm2 %xmm1 # round 5
1813 call _key_expansion_256a
1814 AESKEYGENASSIST 0x10 %xmm0 %xmm1
1815 call _key_expansion_256b
1816 AESKEYGENASSIST 0x20 %xmm2 %xmm1 # round 6
1817 call _key_expansion_256a
1818 AESKEYGENASSIST 0x20 %xmm0 %xmm1
1819 call _key_expansion_256b
1820 AESKEYGENASSIST 0x40 %xmm2 %xmm1 # round 7
1821 call _key_expansion_256a
1822 jmp .Ldec_key
1823 .Lenc_key192:
1824 movq 0x10(UKEYP), %xmm2 # other user key
1825 AESKEYGENASSIST 0x1 %xmm2 %xmm1 # round 1
1826 call _key_expansion_192a
1827 AESKEYGENASSIST 0x2 %xmm2 %xmm1 # round 2
1828 call _key_expansion_192b
1829 AESKEYGENASSIST 0x4 %xmm2 %xmm1 # round 3
1830 call _key_expansion_192a
1831 AESKEYGENASSIST 0x8 %xmm2 %xmm1 # round 4
1832 call _key_expansion_192b
1833 AESKEYGENASSIST 0x10 %xmm2 %xmm1 # round 5
1834 call _key_expansion_192a
1835 AESKEYGENASSIST 0x20 %xmm2 %xmm1 # round 6
1836 call _key_expansion_192b
1837 AESKEYGENASSIST 0x40 %xmm2 %xmm1 # round 7
1838 call _key_expansion_192a
1839 AESKEYGENASSIST 0x80 %xmm2 %xmm1 # round 8
1840 call _key_expansion_192b
1841 jmp .Ldec_key
1842 .Lenc_key128:
1843 AESKEYGENASSIST 0x1 %xmm0 %xmm1 # round 1
1844 call _key_expansion_128
1845 AESKEYGENASSIST 0x2 %xmm0 %xmm1 # round 2
1846 call _key_expansion_128
1847 AESKEYGENASSIST 0x4 %xmm0 %xmm1 # round 3
1848 call _key_expansion_128
1849 AESKEYGENASSIST 0x8 %xmm0 %xmm1 # round 4
1850 call _key_expansion_128
1851 AESKEYGENASSIST 0x10 %xmm0 %xmm1 # round 5
1852 call _key_expansion_128
1853 AESKEYGENASSIST 0x20 %xmm0 %xmm1 # round 6
1854 call _key_expansion_128
1855 AESKEYGENASSIST 0x40 %xmm0 %xmm1 # round 7
1856 call _key_expansion_128
1857 AESKEYGENASSIST 0x80 %xmm0 %xmm1 # round 8
1858 call _key_expansion_128
1859 AESKEYGENASSIST 0x1b %xmm0 %xmm1 # round 9
1860 call _key_expansion_128
1861 AESKEYGENASSIST 0x36 %xmm0 %xmm1 # round 10
1862 call _key_expansion_128
1863 .Ldec_key:
1864 sub $0x10, TKEYP
1865 movaps (KEYP), %xmm0
1866 movaps (TKEYP), %xmm1
1867 movaps %xmm0, 240(TKEYP)
1868 movaps %xmm1, 240(KEYP)
1869 add $0x10, KEYP
1870 lea 240-16(TKEYP), UKEYP
1871 .align 4
1872 .Ldec_key_loop:
1873 movaps (KEYP), %xmm0
1874 AESIMC %xmm0 %xmm1
1875 movaps %xmm1, (UKEYP)
1876 add $0x10, KEYP
1877 sub $0x10, UKEYP
1878 cmp TKEYP, KEYP
1879 jb .Ldec_key_loop
1880 xor AREG, AREG
1881 #ifndef __x86_64__
1882 popl KEYP
1883 #endif
1884 ret
1886 /*
1887 * void aesni_enc(struct crypto_aes_ctx *ctx, u8 *dst, const u8 *src)
1888 */
1889 ENTRY(aesni_enc)
1890 #ifndef __x86_64__
1891 pushl KEYP
1892 pushl KLEN
1893 movl 12(%esp), KEYP
1894 movl 16(%esp), OUTP
1895 movl 20(%esp), INP
1896 #endif
1897 movl 480(KEYP), KLEN # key length
1898 movups (INP), STATE # input
1899 call _aesni_enc1
1900 movups STATE, (OUTP) # output
1901 #ifndef __x86_64__
1902 popl KLEN
1903 popl KEYP
1904 #endif
1905 ret
1907 /*
1908 * _aesni_enc1: internal ABI
1909 * input:
1910 * KEYP: key struct pointer
1911 * KLEN: round count
1912 * STATE: initial state (input)
1913 * output:
1914 * STATE: finial state (output)
1915 * changed:
1916 * KEY
1917 * TKEYP (T1)
1918 */
1919 .align 4
1920 _aesni_enc1:
1921 movaps (KEYP), KEY # key
1922 mov KEYP, TKEYP
1923 pxor KEY, STATE # round 0
1924 add $0x30, TKEYP
1925 cmp $24, KLEN
1926 jb .Lenc128
1927 lea 0x20(TKEYP), TKEYP
1928 je .Lenc192
1929 add $0x20, TKEYP
1930 movaps -0x60(TKEYP), KEY
1931 AESENC KEY STATE
1932 movaps -0x50(TKEYP), KEY
1933 AESENC KEY STATE
1934 .align 4
1935 .Lenc192:
1936 movaps -0x40(TKEYP), KEY
1937 AESENC KEY STATE
1938 movaps -0x30(TKEYP), KEY
1939 AESENC KEY STATE
1940 .align 4
1941 .Lenc128:
1942 movaps -0x20(TKEYP), KEY
1943 AESENC KEY STATE
1944 movaps -0x10(TKEYP), KEY
1945 AESENC KEY STATE
1946 movaps (TKEYP), KEY
1947 AESENC KEY STATE
1948 movaps 0x10(TKEYP), KEY
1949 AESENC KEY STATE
1950 movaps 0x20(TKEYP), KEY
1951 AESENC KEY STATE
1952 movaps 0x30(TKEYP), KEY
1953 AESENC KEY STATE
1954 movaps 0x40(TKEYP), KEY
1955 AESENC KEY STATE
1956 movaps 0x50(TKEYP), KEY
1957 AESENC KEY STATE
1958 movaps 0x60(TKEYP), KEY
1959 AESENC KEY STATE
1960 movaps 0x70(TKEYP), KEY
1961 AESENCLAST KEY STATE
1962 ret
1964 /*
1965 * _aesni_enc4: internal ABI
1966 * input:
1967 * KEYP: key struct pointer
1968 * KLEN: round count
1969 * STATE1: initial state (input)
1970 * STATE2
1971 * STATE3
1972 * STATE4
1973 * output:
1974 * STATE1: finial state (output)
1975 * STATE2
1976 * STATE3
1977 * STATE4
1978 * changed:
1979 * KEY
1980 * TKEYP (T1)
1981 */
1982 .align 4
1983 _aesni_enc4:
1984 movaps (KEYP), KEY # key
1985 mov KEYP, TKEYP
1986 pxor KEY, STATE1 # round 0
1987 pxor KEY, STATE2
1988 pxor KEY, STATE3
1989 pxor KEY, STATE4
1990 add $0x30, TKEYP
1991 cmp $24, KLEN
1992 jb .L4enc128
1993 lea 0x20(TKEYP), TKEYP
1994 je .L4enc192
1995 add $0x20, TKEYP
1996 movaps -0x60(TKEYP), KEY
1997 AESENC KEY STATE1
1998 AESENC KEY STATE2
1999 AESENC KEY STATE3
2000 AESENC KEY STATE4
2001 movaps -0x50(TKEYP), KEY
2002 AESENC KEY STATE1
2003 AESENC KEY STATE2
2004 AESENC KEY STATE3
2005 AESENC KEY STATE4
2006 #.align 4
2007 .L4enc192:
2008 movaps -0x40(TKEYP), KEY
2009 AESENC KEY STATE1
2010 AESENC KEY STATE2
2011 AESENC KEY STATE3
2012 AESENC KEY STATE4
2013 movaps -0x30(TKEYP), KEY
2014 AESENC KEY STATE1
2015 AESENC KEY STATE2
2016 AESENC KEY STATE3
2017 AESENC KEY STATE4
2018 #.align 4
2019 .L4enc128:
2020 movaps -0x20(TKEYP), KEY
2021 AESENC KEY STATE1
2022 AESENC KEY STATE2
2023 AESENC KEY STATE3
2024 AESENC KEY STATE4
2025 movaps -0x10(TKEYP), KEY
2026 AESENC KEY STATE1
2027 AESENC KEY STATE2
2028 AESENC KEY STATE3
2029 AESENC KEY STATE4
2030 movaps (TKEYP), KEY
2031 AESENC KEY STATE1
2032 AESENC KEY STATE2
2033 AESENC KEY STATE3
2034 AESENC KEY STATE4
2035 movaps 0x10(TKEYP), KEY
2036 AESENC KEY STATE1
2037 AESENC KEY STATE2
2038 AESENC KEY STATE3
2039 AESENC KEY STATE4
2040 movaps 0x20(TKEYP), KEY
2041 AESENC KEY STATE1
2042 AESENC KEY STATE2
2043 AESENC KEY STATE3
2044 AESENC KEY STATE4
2045 movaps 0x30(TKEYP), KEY
2046 AESENC KEY STATE1
2047 AESENC KEY STATE2
2048 AESENC KEY STATE3
2049 AESENC KEY STATE4
2050 movaps 0x40(TKEYP), KEY
2051 AESENC KEY STATE1
2052 AESENC KEY STATE2
2053 AESENC KEY STATE3
2054 AESENC KEY STATE4
2055 movaps 0x50(TKEYP), KEY
2056 AESENC KEY STATE1
2057 AESENC KEY STATE2
2058 AESENC KEY STATE3
2059 AESENC KEY STATE4
2060 movaps 0x60(TKEYP), KEY
2061 AESENC KEY STATE1
2062 AESENC KEY STATE2
2063 AESENC KEY STATE3
2064 AESENC KEY STATE4
2065 movaps 0x70(TKEYP), KEY
2066 AESENCLAST KEY STATE1 # last round
2067 AESENCLAST KEY STATE2
2068 AESENCLAST KEY STATE3
2069 AESENCLAST KEY STATE4
2070 ret
2072 /*
2073 * void aesni_dec (struct crypto_aes_ctx *ctx, u8 *dst, const u8 *src)
2074 */
2075 ENTRY(aesni_dec)
2076 #ifndef __x86_64__
2077 pushl KEYP
2078 pushl KLEN
2079 movl 12(%esp), KEYP
2080 movl 16(%esp), OUTP
2081 movl 20(%esp), INP
2082 #endif
2083 mov 480(KEYP), KLEN # key length
2084 add $240, KEYP
2085 movups (INP), STATE # input
2086 call _aesni_dec1
2087 movups STATE, (OUTP) #output
2088 #ifndef __x86_64__
2089 popl KLEN
2090 popl KEYP
2091 #endif
2092 ret
2094 /*
2095 * _aesni_dec1: internal ABI
2096 * input:
2097 * KEYP: key struct pointer
2098 * KLEN: key length
2099 * STATE: initial state (input)
2100 * output:
2101 * STATE: finial state (output)
2102 * changed:
2103 * KEY
2104 * TKEYP (T1)
2105 */
2106 .align 4
2107 _aesni_dec1:
2108 movaps (KEYP), KEY # key
2109 mov KEYP, TKEYP
2110 pxor KEY, STATE # round 0
2111 add $0x30, TKEYP
2112 cmp $24, KLEN
2113 jb .Ldec128
2114 lea 0x20(TKEYP), TKEYP
2115 je .Ldec192
2116 add $0x20, TKEYP
2117 movaps -0x60(TKEYP), KEY
2118 AESDEC KEY STATE
2119 movaps -0x50(TKEYP), KEY
2120 AESDEC KEY STATE
2121 .align 4
2122 .Ldec192:
2123 movaps -0x40(TKEYP), KEY
2124 AESDEC KEY STATE
2125 movaps -0x30(TKEYP), KEY
2126 AESDEC KEY STATE
2127 .align 4
2128 .Ldec128:
2129 movaps -0x20(TKEYP), KEY
2130 AESDEC KEY STATE
2131 movaps -0x10(TKEYP), KEY
2132 AESDEC KEY STATE
2133 movaps (TKEYP), KEY
2134 AESDEC KEY STATE
2135 movaps 0x10(TKEYP), KEY
2136 AESDEC KEY STATE
2137 movaps 0x20(TKEYP), KEY
2138 AESDEC KEY STATE
2139 movaps 0x30(TKEYP), KEY
2140 AESDEC KEY STATE
2141 movaps 0x40(TKEYP), KEY
2142 AESDEC KEY STATE
2143 movaps 0x50(TKEYP), KEY
2144 AESDEC KEY STATE
2145 movaps 0x60(TKEYP), KEY
2146 AESDEC KEY STATE
2147 movaps 0x70(TKEYP), KEY
2148 AESDECLAST KEY STATE
2149 ret
2151 /*
2152 * _aesni_dec4: internal ABI
2153 * input:
2154 * KEYP: key struct pointer
2155 * KLEN: key length
2156 * STATE1: initial state (input)
2157 * STATE2
2158 * STATE3
2159 * STATE4
2160 * output:
2161 * STATE1: finial state (output)
2162 * STATE2
2163 * STATE3
2164 * STATE4
2165 * changed:
2166 * KEY
2167 * TKEYP (T1)
2168 */
2169 .align 4
2170 _aesni_dec4:
2171 movaps (KEYP), KEY # key
2172 mov KEYP, TKEYP
2173 pxor KEY, STATE1 # round 0
2174 pxor KEY, STATE2
2175 pxor KEY, STATE3
2176 pxor KEY, STATE4
2177 add $0x30, TKEYP
2178 cmp $24, KLEN
2179 jb .L4dec128
2180 lea 0x20(TKEYP), TKEYP
2181 je .L4dec192
2182 add $0x20, TKEYP
2183 movaps -0x60(TKEYP), KEY
2184 AESDEC KEY STATE1
2185 AESDEC KEY STATE2
2186 AESDEC KEY STATE3
2187 AESDEC KEY STATE4
2188 movaps -0x50(TKEYP), KEY
2189 AESDEC KEY STATE1
2190 AESDEC KEY STATE2
2191 AESDEC KEY STATE3
2192 AESDEC KEY STATE4
2193 .align 4
2194 .L4dec192:
2195 movaps -0x40(TKEYP), KEY
2196 AESDEC KEY STATE1
2197 AESDEC KEY STATE2
2198 AESDEC KEY STATE3
2199 AESDEC KEY STATE4
2200 movaps -0x30(TKEYP), KEY
2201 AESDEC KEY STATE1
2202 AESDEC KEY STATE2
2203 AESDEC KEY STATE3
2204 AESDEC KEY STATE4
2205 .align 4
2206 .L4dec128:
2207 movaps -0x20(TKEYP), KEY
2208 AESDEC KEY STATE1
2209 AESDEC KEY STATE2
2210 AESDEC KEY STATE3
2211 AESDEC KEY STATE4
2212 movaps -0x10(TKEYP), KEY
2213 AESDEC KEY STATE1
2214 AESDEC KEY STATE2
2215 AESDEC KEY STATE3
2216 AESDEC KEY STATE4
2217 movaps (TKEYP), KEY
2218 AESDEC KEY STATE1
2219 AESDEC KEY STATE2
2220 AESDEC KEY STATE3
2221 AESDEC KEY STATE4
2222 movaps 0x10(TKEYP), KEY
2223 AESDEC KEY STATE1
2224 AESDEC KEY STATE2
2225 AESDEC KEY STATE3
2226 AESDEC KEY STATE4
2227 movaps 0x20(TKEYP), KEY
2228 AESDEC KEY STATE1
2229 AESDEC KEY STATE2
2230 AESDEC KEY STATE3
2231 AESDEC KEY STATE4
2232 movaps 0x30(TKEYP), KEY
2233 AESDEC KEY STATE1
2234 AESDEC KEY STATE2
2235 AESDEC KEY STATE3
2236 AESDEC KEY STATE4
2237 movaps 0x40(TKEYP), KEY
2238 AESDEC KEY STATE1
2239 AESDEC KEY STATE2
2240 AESDEC KEY STATE3
2241 AESDEC KEY STATE4
2242 movaps 0x50(TKEYP), KEY
2243 AESDEC KEY STATE1
2244 AESDEC KEY STATE2
2245 AESDEC KEY STATE3
2246 AESDEC KEY STATE4
2247 movaps 0x60(TKEYP), KEY
2248 AESDEC KEY STATE1
2249 AESDEC KEY STATE2
2250 AESDEC KEY STATE3
2251 AESDEC KEY STATE4
2252 movaps 0x70(TKEYP), KEY
2253 AESDECLAST KEY STATE1 # last round
2254 AESDECLAST KEY STATE2
2255 AESDECLAST KEY STATE3
2256 AESDECLAST KEY STATE4
2257 ret
2259 /*
2260 * void aesni_ecb_enc(struct crypto_aes_ctx *ctx, const u8 *dst, u8 *src,
2261 * size_t len)
2262 */
2263 ENTRY(aesni_ecb_enc)
2264 #ifndef __x86_64__
2265 pushl LEN
2266 pushl KEYP
2267 pushl KLEN
2268 movl 16(%esp), KEYP
2269 movl 20(%esp), OUTP
2270 movl 24(%esp), INP
2271 movl 28(%esp), LEN
2272 #endif
2273 test LEN, LEN # check length
2274 jz .Lecb_enc_ret
2275 mov 480(KEYP), KLEN
2276 cmp $16, LEN
2277 jb .Lecb_enc_ret
2278 cmp $64, LEN
2279 jb .Lecb_enc_loop1
2280 .align 4
2281 .Lecb_enc_loop4:
2282 movups (INP), STATE1
2283 movups 0x10(INP), STATE2
2284 movups 0x20(INP), STATE3
2285 movups 0x30(INP), STATE4
2286 call _aesni_enc4
2287 movups STATE1, (OUTP)
2288 movups STATE2, 0x10(OUTP)
2289 movups STATE3, 0x20(OUTP)
2290 movups STATE4, 0x30(OUTP)
2291 sub $64, LEN
2292 add $64, INP
2293 add $64, OUTP
2294 cmp $64, LEN
2295 jge .Lecb_enc_loop4
2296 cmp $16, LEN
2297 jb .Lecb_enc_ret
2298 .align 4
2299 .Lecb_enc_loop1:
2300 movups (INP), STATE1
2301 call _aesni_enc1
2302 movups STATE1, (OUTP)
2303 sub $16, LEN
2304 add $16, INP
2305 add $16, OUTP
2306 cmp $16, LEN
2307 jge .Lecb_enc_loop1
2308 .Lecb_enc_ret:
2309 #ifndef __x86_64__
2310 popl KLEN
2311 popl KEYP
2312 popl LEN
2313 #endif
2314 ret
2316 /*
2317 * void aesni_ecb_dec(struct crypto_aes_ctx *ctx, const u8 *dst, u8 *src,
2318 * size_t len);
2319 */
2320 ENTRY(aesni_ecb_dec)
2321 #ifndef __x86_64__
2322 pushl LEN
2323 pushl KEYP
2324 pushl KLEN
2325 movl 16(%esp), KEYP
2326 movl 20(%esp), OUTP
2327 movl 24(%esp), INP
2328 movl 28(%esp), LEN
2329 #endif
2330 test LEN, LEN
2331 jz .Lecb_dec_ret
2332 mov 480(KEYP), KLEN
2333 add $240, KEYP
2334 cmp $16, LEN
2335 jb .Lecb_dec_ret
2336 cmp $64, LEN
2337 jb .Lecb_dec_loop1
2338 .align 4
2339 .Lecb_dec_loop4:
2340 movups (INP), STATE1
2341 movups 0x10(INP), STATE2
2342 movups 0x20(INP), STATE3
2343 movups 0x30(INP), STATE4
2344 call _aesni_dec4
2345 movups STATE1, (OUTP)
2346 movups STATE2, 0x10(OUTP)
2347 movups STATE3, 0x20(OUTP)
2348 movups STATE4, 0x30(OUTP)
2349 sub $64, LEN
2350 add $64, INP
2351 add $64, OUTP
2352 cmp $64, LEN
2353 jge .Lecb_dec_loop4
2354 cmp $16, LEN
2355 jb .Lecb_dec_ret
2356 .align 4
2357 .Lecb_dec_loop1:
2358 movups (INP), STATE1
2359 call _aesni_dec1
2360 movups STATE1, (OUTP)
2361 sub $16, LEN
2362 add $16, INP
2363 add $16, OUTP
2364 cmp $16, LEN
2365 jge .Lecb_dec_loop1
2366 .Lecb_dec_ret:
2367 #ifndef __x86_64__
2368 popl KLEN
2369 popl KEYP
2370 popl LEN
2371 #endif
2372 ret
2374 /*
2375 * void aesni_cbc_enc(struct crypto_aes_ctx *ctx, const u8 *dst, u8 *src,
2376 * size_t len, u8 *iv)
2377 */
2378 ENTRY(aesni_cbc_enc)
2379 #ifndef __x86_64__
2380 pushl IVP
2381 pushl LEN
2382 pushl KEYP
2383 pushl KLEN
2384 movl 20(%esp), KEYP
2385 movl 24(%esp), OUTP
2386 movl 28(%esp), INP
2387 movl 32(%esp), LEN
2388 movl 36(%esp), IVP
2389 #endif
2390 cmp $16, LEN
2391 jb .Lcbc_enc_ret
2392 mov 480(KEYP), KLEN
2393 movups (IVP), STATE # load iv as initial state
2394 .align 4
2395 .Lcbc_enc_loop:
2396 movups (INP), IN # load input
2397 pxor IN, STATE
2398 call _aesni_enc1
2399 movups STATE, (OUTP) # store output
2400 sub $16, LEN
2401 add $16, INP
2402 add $16, OUTP
2403 cmp $16, LEN
2404 jge .Lcbc_enc_loop
2405 movups STATE, (IVP)
2406 .Lcbc_enc_ret:
2407 #ifndef __x86_64__
2408 popl KLEN
2409 popl KEYP
2410 popl LEN
2411 popl IVP
2412 #endif
2413 ret
2415 /*
2416 * void aesni_cbc_dec(struct crypto_aes_ctx *ctx, const u8 *dst, u8 *src,
2417 * size_t len, u8 *iv)
2418 */
2419 ENTRY(aesni_cbc_dec)
2420 #ifndef __x86_64__
2421 pushl IVP
2422 pushl LEN
2423 pushl KEYP
2424 pushl KLEN
2425 movl 20(%esp), KEYP
2426 movl 24(%esp), OUTP
2427 movl 28(%esp), INP
2428 movl 32(%esp), LEN
2429 movl 36(%esp), IVP
2430 #endif
2431 cmp $16, LEN
2432 jb .Lcbc_dec_just_ret
2433 mov 480(KEYP), KLEN
2434 add $240, KEYP
2435 movups (IVP), IV
2436 cmp $64, LEN
2437 jb .Lcbc_dec_loop1
2438 .align 4
2439 .Lcbc_dec_loop4:
2440 movups (INP), IN1
2441 movaps IN1, STATE1
2442 movups 0x10(INP), IN2
2443 movaps IN2, STATE2
2444 #ifdef __x86_64__
2445 movups 0x20(INP), IN3
2446 movaps IN3, STATE3
2447 movups 0x30(INP), IN4
2448 movaps IN4, STATE4
2449 #else
2450 movups 0x20(INP), IN1
2451 movaps IN1, STATE3
2452 movups 0x30(INP), IN2
2453 movaps IN2, STATE4
2454 #endif
2455 call _aesni_dec4
2456 pxor IV, STATE1
2457 #ifdef __x86_64__
2458 pxor IN1, STATE2
2459 pxor IN2, STATE3
2460 pxor IN3, STATE4
2461 movaps IN4, IV
2462 #else
2463 pxor (INP), STATE2
2464 pxor 0x10(INP), STATE3
2465 pxor IN1, STATE4
2466 movaps IN2, IV
2467 #endif
2468 movups STATE1, (OUTP)
2469 movups STATE2, 0x10(OUTP)
2470 movups STATE3, 0x20(OUTP)
2471 movups STATE4, 0x30(OUTP)
2472 sub $64, LEN
2473 add $64, INP
2474 add $64, OUTP
2475 cmp $64, LEN
2476 jge .Lcbc_dec_loop4
2477 cmp $16, LEN
2478 jb .Lcbc_dec_ret
2479 .align 4
2480 .Lcbc_dec_loop1:
2481 movups (INP), IN
2482 movaps IN, STATE
2483 call _aesni_dec1
2484 pxor IV, STATE
2485 movups STATE, (OUTP)
2486 movaps IN, IV
2487 sub $16, LEN
2488 add $16, INP
2489 add $16, OUTP
2490 cmp $16, LEN
2491 jge .Lcbc_dec_loop1
2492 .Lcbc_dec_ret:
2493 movups IV, (IVP)
2494 .Lcbc_dec_just_ret:
2495 #ifndef __x86_64__
2496 popl KLEN
2497 popl KEYP
2498 popl LEN
2499 popl IVP
2500 #endif
2501 ret
2503 #ifdef __x86_64__
2504 .align 16
2505 .Lbswap_mask:
2506 .byte 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0
2508 /*
2509 * _aesni_inc_init: internal ABI
2510 * setup registers used by _aesni_inc
2511 * input:
2512 * IV
2513 * output:
2514 * CTR: == IV, in little endian
2515 * TCTR_LOW: == lower qword of CTR
2516 * INC: == 1, in little endian
2517 * BSWAP_MASK == endian swapping mask
2518 */
2519 .align 4
2520 _aesni_inc_init:
2521 movaps .Lbswap_mask, BSWAP_MASK
2522 movaps IV, CTR
2523 PSHUFB_XMM BSWAP_MASK CTR
2524 mov $1, TCTR_LOW
2525 MOVQ_R64_XMM TCTR_LOW INC
2526 MOVQ_R64_XMM CTR TCTR_LOW
2527 ret
2529 /*
2530 * _aesni_inc: internal ABI
2531 * Increase IV by 1, IV is in big endian
2532 * input:
2533 * IV
2534 * CTR: == IV, in little endian
2535 * TCTR_LOW: == lower qword of CTR
2536 * INC: == 1, in little endian
2537 * BSWAP_MASK == endian swapping mask
2538 * output:
2539 * IV: Increase by 1
2540 * changed:
2541 * CTR: == output IV, in little endian
2542 * TCTR_LOW: == lower qword of CTR
2543 */
2544 .align 4
2545 _aesni_inc:
2546 paddq INC, CTR
2547 add $1, TCTR_LOW
2548 jnc .Linc_low
2549 pslldq $8, INC
2550 paddq INC, CTR
2551 psrldq $8, INC
2552 .Linc_low:
2553 movaps CTR, IV
2554 PSHUFB_XMM BSWAP_MASK IV
2555 ret
2557 /*
2558 * void aesni_ctr_enc(struct crypto_aes_ctx *ctx, const u8 *dst, u8 *src,
2559 * size_t len, u8 *iv)
2560 */
2561 ENTRY(aesni_ctr_enc)
2562 cmp $16, LEN
2563 jb .Lctr_enc_just_ret
2564 mov 480(KEYP), KLEN
2565 movups (IVP), IV
2566 call _aesni_inc_init
2567 cmp $64, LEN
2568 jb .Lctr_enc_loop1
2569 .align 4
2570 .Lctr_enc_loop4:
2571 movaps IV, STATE1
2572 call _aesni_inc
2573 movups (INP), IN1
2574 movaps IV, STATE2
2575 call _aesni_inc
2576 movups 0x10(INP), IN2
2577 movaps IV, STATE3
2578 call _aesni_inc
2579 movups 0x20(INP), IN3
2580 movaps IV, STATE4
2581 call _aesni_inc
2582 movups 0x30(INP), IN4
2583 call _aesni_enc4
2584 pxor IN1, STATE1
2585 movups STATE1, (OUTP)
2586 pxor IN2, STATE2
2587 movups STATE2, 0x10(OUTP)
2588 pxor IN3, STATE3
2589 movups STATE3, 0x20(OUTP)
2590 pxor IN4, STATE4
2591 movups STATE4, 0x30(OUTP)
2592 sub $64, LEN
2593 add $64, INP
2594 add $64, OUTP
2595 cmp $64, LEN
2596 jge .Lctr_enc_loop4
2597 cmp $16, LEN
2598 jb .Lctr_enc_ret
2599 .align 4
2600 .Lctr_enc_loop1:
2601 movaps IV, STATE
2602 call _aesni_inc
2603 movups (INP), IN
2604 call _aesni_enc1
2605 pxor IN, STATE
2606 movups STATE, (OUTP)
2607 sub $16, LEN
2608 add $16, INP
2609 add $16, OUTP
2610 cmp $16, LEN
2611 jge .Lctr_enc_loop1
2612 .Lctr_enc_ret:
2613 movups IV, (IVP)
2614 .Lctr_enc_just_ret:
2615 ret
2616 #endif