arch/x86/crypto/sha1_ni

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   1 /*
   2  * Intel SHA Extensions optimized implementation of a SHA-1 update function
   3  *
   4  * This file is provided under a dual BSD/GPLv2 license.  When using or
   5  * redistributing this file, you may do so under either license.
   6  *
   7  * GPL LICENSE SUMMARY
   8  *
   9  * Copyright(c) 2015 Intel Corporation.
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of version 2 of the GNU General Public License as
  13  * published by the Free Software Foundation.
  14  *
  15  * This program is distributed in the hope that it will be useful, but
  16  * WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  18  * General Public License for more details.
  19  *
  20  * Contact Information:
  21  *      Sean Gulley <sean.m.gulley@intel.com>
  22  *      Tim Chen <tim.c.chen@linux.intel.com>
  23  *
  24  * BSD LICENSE
  25  *
  26  * Copyright(c) 2015 Intel Corporation.
  27  *
  28  * Redistribution and use in source and binary forms, with or without
  29  * modification, are permitted provided that the following conditions
  30  * are met:
  31  *
  32  *      * Redistributions of source code must retain the above copyright
  33  *        notice, this list of conditions and the following disclaimer.
  34  *      * Redistributions in binary form must reproduce the above copyright
  35  *        notice, this list of conditions and the following disclaimer in
  36  *        the documentation and/or other materials provided with the
  37  *        distribution.
  38  *      * Neither the name of Intel Corporation nor the names of its
  39  *        contributors may be used to endorse or promote products derived
  40  *        from this software without specific prior written permission.
  41  *
  42  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  43  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  44  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  45  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  46  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  47  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  48  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  49  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  50  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  51  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  52  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  53  *
  54  */
  55 
  56 #include <linux/linkage.h>
  57 
  58 #define DIGEST_PTR      %rdi    /* 1st arg */
  59 #define DATA_PTR        %rsi    /* 2nd arg */
  60 #define NUM_BLKS        %rdx    /* 3rd arg */
  61 
  62 #define RSPSAVE         %rax
  63 
  64 /* gcc conversion */
  65 #define FRAME_SIZE      32      /* space for 2x16 bytes */
  66 
  67 #define ABCD            %xmm0
  68 #define E0              %xmm1   /* Need two E's b/c they ping pong */
  69 #define E1              %xmm2
  70 #define MSG0            %xmm3
  71 #define MSG1            %xmm4
  72 #define MSG2            %xmm5
  73 #define MSG3            %xmm6
  74 #define SHUF_MASK       %xmm7
  75 
  76 
  77 /*
  78  * Intel SHA Extensions optimized implementation of a SHA-1 update function
  79  *
  80  * The function takes a pointer to the current hash values, a pointer to the
  81  * input data, and a number of 64 byte blocks to process.  Once all blocks have
  82  * been processed, the digest pointer is  updated with the resulting hash value.
  83  * The function only processes complete blocks, there is no functionality to
  84  * store partial blocks. All message padding and hash value initialization must
  85  * be done outside the update function.
  86  *
  87  * The indented lines in the loop are instructions related to rounds processing.
  88  * The non-indented lines are instructions related to the message schedule.
  89  *
  90  * void sha1_ni_transform(uint32_t *digest, const void *data,
  91                 uint32_t numBlocks)
  92  * digest : pointer to digest
  93  * data: pointer to input data
  94  * numBlocks: Number of blocks to process
  95  */
  96 .text
  97 .align 32
  98 ENTRY(sha1_ni_transform)
  99         mov             %rsp, RSPSAVE
 100         sub             $FRAME_SIZE, %rsp
 101         and             $~0xF, %rsp
 102 
 103         shl             $6, NUM_BLKS            /* convert to bytes */
 104         jz              .Ldone_hash
 105         add             DATA_PTR, NUM_BLKS      /* pointer to end of data */
 106 
 107         /* load initial hash values */
 108         pinsrd          $3, 1*16(DIGEST_PTR), E0
 109         movdqu          0*16(DIGEST_PTR), ABCD
 110         pand            UPPER_WORD_MASK(%rip), E0
 111         pshufd          $0x1B, ABCD, ABCD
 112 
 113         movdqa          PSHUFFLE_BYTE_FLIP_MASK(%rip), SHUF_MASK
 114 
 115 .Lloop0:
 116         /* Save hash values for addition after rounds */
 117         movdqa          E0, (0*16)(%rsp)
 118         movdqa          ABCD, (1*16)(%rsp)
 119 
 120         /* Rounds 0-3 */
 121         movdqu          0*16(DATA_PTR), MSG0
 122         pshufb          SHUF_MASK, MSG0
 123                 paddd           MSG0, E0
 124                 movdqa          ABCD, E1
 125                 sha1rnds4       $0, E0, ABCD
 126 
 127         /* Rounds 4-7 */
 128         movdqu          1*16(DATA_PTR), MSG1
 129         pshufb          SHUF_MASK, MSG1
 130                 sha1nexte       MSG1, E1
 131                 movdqa          ABCD, E0
 132                 sha1rnds4       $0, E1, ABCD
 133         sha1msg1        MSG1, MSG0
 134 
 135         /* Rounds 8-11 */
 136         movdqu          2*16(DATA_PTR), MSG2
 137         pshufb          SHUF_MASK, MSG2
 138                 sha1nexte       MSG2, E0
 139                 movdqa          ABCD, E1
 140                 sha1rnds4       $0, E0, ABCD
 141         sha1msg1        MSG2, MSG1
 142         pxor            MSG2, MSG0
 143 
 144         /* Rounds 12-15 */
 145         movdqu          3*16(DATA_PTR), MSG3
 146         pshufb          SHUF_MASK, MSG3
 147                 sha1nexte       MSG3, E1
 148                 movdqa          ABCD, E0
 149         sha1msg2        MSG3, MSG0
 150                 sha1rnds4       $0, E1, ABCD
 151         sha1msg1        MSG3, MSG2
 152         pxor            MSG3, MSG1
 153 
 154         /* Rounds 16-19 */
 155                 sha1nexte       MSG0, E0
 156                 movdqa          ABCD, E1
 157         sha1msg2        MSG0, MSG1
 158                 sha1rnds4       $0, E0, ABCD
 159         sha1msg1        MSG0, MSG3
 160         pxor            MSG0, MSG2
 161 
 162         /* Rounds 20-23 */
 163                 sha1nexte       MSG1, E1
 164                 movdqa          ABCD, E0
 165         sha1msg2        MSG1, MSG2
 166                 sha1rnds4       $1, E1, ABCD
 167         sha1msg1        MSG1, MSG0
 168         pxor            MSG1, MSG3
 169 
 170         /* Rounds 24-27 */
 171                 sha1nexte       MSG2, E0
 172                 movdqa          ABCD, E1
 173         sha1msg2        MSG2, MSG3
 174                 sha1rnds4       $1, E0, ABCD
 175         sha1msg1        MSG2, MSG1
 176         pxor            MSG2, MSG0
 177 
 178         /* Rounds 28-31 */
 179                 sha1nexte       MSG3, E1
 180                 movdqa          ABCD, E0
 181         sha1msg2        MSG3, MSG0
 182                 sha1rnds4       $1, E1, ABCD
 183         sha1msg1        MSG3, MSG2
 184         pxor            MSG3, MSG1
 185 
 186         /* Rounds 32-35 */
 187                 sha1nexte       MSG0, E0
 188                 movdqa          ABCD, E1
 189         sha1msg2        MSG0, MSG1
 190                 sha1rnds4       $1, E0, ABCD
 191         sha1msg1        MSG0, MSG3
 192         pxor            MSG0, MSG2
 193 
 194         /* Rounds 36-39 */
 195                 sha1nexte       MSG1, E1
 196                 movdqa          ABCD, E0
 197         sha1msg2        MSG1, MSG2
 198                 sha1rnds4       $1, E1, ABCD
 199         sha1msg1        MSG1, MSG0
 200         pxor            MSG1, MSG3
 201 
 202         /* Rounds 40-43 */
 203                 sha1nexte       MSG2, E0
 204                 movdqa          ABCD, E1
 205         sha1msg2        MSG2, MSG3
 206                 sha1rnds4       $2, E0, ABCD
 207         sha1msg1        MSG2, MSG1
 208         pxor            MSG2, MSG0
 209 
 210         /* Rounds 44-47 */
 211                 sha1nexte       MSG3, E1
 212                 movdqa          ABCD, E0
 213         sha1msg2        MSG3, MSG0
 214                 sha1rnds4       $2, E1, ABCD
 215         sha1msg1        MSG3, MSG2
 216         pxor            MSG3, MSG1
 217 
 218         /* Rounds 48-51 */
 219                 sha1nexte       MSG0, E0
 220                 movdqa          ABCD, E1
 221         sha1msg2        MSG0, MSG1
 222                 sha1rnds4       $2, E0, ABCD
 223         sha1msg1        MSG0, MSG3
 224         pxor            MSG0, MSG2
 225 
 226         /* Rounds 52-55 */
 227                 sha1nexte       MSG1, E1
 228                 movdqa          ABCD, E0
 229         sha1msg2        MSG1, MSG2
 230                 sha1rnds4       $2, E1, ABCD
 231         sha1msg1        MSG1, MSG0
 232         pxor            MSG1, MSG3
 233 
 234         /* Rounds 56-59 */
 235                 sha1nexte       MSG2, E0
 236                 movdqa          ABCD, E1
 237         sha1msg2        MSG2, MSG3
 238                 sha1rnds4       $2, E0, ABCD
 239         sha1msg1        MSG2, MSG1
 240         pxor            MSG2, MSG0
 241 
 242         /* Rounds 60-63 */
 243                 sha1nexte       MSG3, E1
 244                 movdqa          ABCD, E0
 245         sha1msg2        MSG3, MSG0
 246                 sha1rnds4       $3, E1, ABCD
 247         sha1msg1        MSG3, MSG2
 248         pxor            MSG3, MSG1
 249 
 250         /* Rounds 64-67 */
 251                 sha1nexte       MSG0, E0
 252                 movdqa          ABCD, E1
 253         sha1msg2        MSG0, MSG1
 254                 sha1rnds4       $3, E0, ABCD
 255         sha1msg1        MSG0, MSG3
 256         pxor            MSG0, MSG2
 257 
 258         /* Rounds 68-71 */
 259                 sha1nexte       MSG1, E1
 260                 movdqa          ABCD, E0
 261         sha1msg2        MSG1, MSG2
 262                 sha1rnds4       $3, E1, ABCD
 263         pxor            MSG1, MSG3
 264 
 265         /* Rounds 72-75 */
 266                 sha1nexte       MSG2, E0
 267                 movdqa          ABCD, E1
 268         sha1msg2        MSG2, MSG3
 269                 sha1rnds4       $3, E0, ABCD
 270 
 271         /* Rounds 76-79 */
 272                 sha1nexte       MSG3, E1
 273                 movdqa          ABCD, E0
 274                 sha1rnds4       $3, E1, ABCD
 275 
 276         /* Add current hash values with previously saved */
 277         sha1nexte       (0*16)(%rsp), E0
 278         paddd           (1*16)(%rsp), ABCD
 279 
 280         /* Increment data pointer and loop if more to process */
 281         add             $64, DATA_PTR
 282         cmp             NUM_BLKS, DATA_PTR
 283         jne             .Lloop0
 284 
 285         /* Write hash values back in the correct order */
 286         pshufd          $0x1B, ABCD, ABCD
 287         movdqu          ABCD, 0*16(DIGEST_PTR)
 288         pextrd          $3, E0, 1*16(DIGEST_PTR)
 289 
 290 .Ldone_hash:
 291         mov             RSPSAVE, %rsp
 292 
 293         ret
 294 ENDPROC(sha1_ni_transform)
 295 
 296 .section        .rodata.cst16.PSHUFFLE_BYTE_FLIP_MASK, "aM", @progbits, 16
 297 .align 16
 298 PSHUFFLE_BYTE_FLIP_MASK:
 299         .octa 0x000102030405060708090a0b0c0d0e0f
 300 
 301 .section        .rodata.cst16.UPPER_WORD_MASK, "aM", @progbits, 16
 302 .align 16
 303 UPPER_WORD_MASK:
 304         .octa 0xFFFFFFFF000000000000000000000000
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root/arch/x86/crypto/sha1_ni_asm.S
