2 * Intel SHA Extensions optimized implementation of a SHA-256 update function
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.
9 * Copyright(c) 2015 Intel Corporation.
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.
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.
20 * Contact Information:
21 * Sean Gulley <sean.m.gulley@intel.com>
22 * Tim Chen <tim.c.chen@linux.intel.com>
26 * Copyright(c) 2015 Intel Corporation.
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29 * modification, are permitted provided that the following conditions
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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
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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.
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56 #include <linux/linkage.h>
57 #include <linux/cfi_types.h>
59 #define DIGEST_PTR %rdi /* 1st arg */
60 #define DATA_PTR %rsi /* 2nd arg */
61 #define NUM_BLKS %rdx /* 3rd arg */
63 #define SHA256CONSTANTS %rax
65 #define MSG %xmm0 /* sha256rnds2 implicit operand */
74 #define SHUF_MASK %xmm8
76 #define ABEF_SAVE %xmm9
77 #define CDGH_SAVE %xmm10
79 .macro do_4rounds i, m0, m1, m2, m3
81 movdqu \i*4(DATA_PTR), \m0
84 movdqa (\i-32)*4(SHA256CONSTANTS), MSG
86 sha256rnds2 STATE0, STATE1
87 .if \i >= 12 && \i < 60
94 sha256rnds2 STATE1, STATE0
95 .if \i >= 4 && \i < 52
101 * Intel SHA Extensions optimized implementation of a SHA-256 update function
103 * The function takes a pointer to the current hash values, a pointer to the
104 * input data, and a number of 64 byte blocks to process. Once all blocks have
105 * been processed, the digest pointer is updated with the resulting hash value.
106 * The function only processes complete blocks, there is no functionality to
107 * store partial blocks. All message padding and hash value initialization must
108 * be done outside the update function.
110 * void sha256_ni_transform(uint32_t *digest, const void *data,
112 * digest : pointer to digest
113 * data: pointer to input data
114 * numBlocks: Number of blocks to process
118 SYM_TYPED_FUNC_START(sha256_ni_transform)
120 shl $6, NUM_BLKS /* convert to bytes */
122 add DATA_PTR, NUM_BLKS /* pointer to end of data */
125 * load initial hash values
126 * Need to reorder these appropriately
127 * DCBA, HGFE -> ABEF, CDGH
129 movdqu 0*16(DIGEST_PTR), STATE0 /* DCBA */
130 movdqu 1*16(DIGEST_PTR), STATE1 /* HGFE */
133 punpcklqdq STATE1, STATE0 /* FEBA */
134 punpckhqdq TMP, STATE1 /* DCHG */
135 pshufd $0x1B, STATE0, STATE0 /* ABEF */
136 pshufd $0xB1, STATE1, STATE1 /* CDGH */
138 movdqa PSHUFFLE_BYTE_FLIP_MASK(%rip), SHUF_MASK
139 lea K256+32*4(%rip), SHA256CONSTANTS
142 /* Save hash values for addition after rounds */
143 movdqa STATE0, ABEF_SAVE
144 movdqa STATE1, CDGH_SAVE
146 .irp i, 0, 16, 32, 48
147 do_4rounds (\i + 0), MSG0, MSG1, MSG2, MSG3
148 do_4rounds (\i + 4), MSG1, MSG2, MSG3, MSG0
149 do_4rounds (\i + 8), MSG2, MSG3, MSG0, MSG1
150 do_4rounds (\i + 12), MSG3, MSG0, MSG1, MSG2
153 /* Add current hash values with previously saved */
154 paddd ABEF_SAVE, STATE0
155 paddd CDGH_SAVE, STATE1
157 /* Increment data pointer and loop if more to process */
159 cmp NUM_BLKS, DATA_PTR
162 /* Write hash values back in the correct order */
164 punpcklqdq STATE1, STATE0 /* GHEF */
165 punpckhqdq TMP, STATE1 /* ABCD */
166 pshufd $0xB1, STATE0, STATE0 /* HGFE */
167 pshufd $0x1B, STATE1, STATE1 /* DCBA */
169 movdqu STATE1, 0*16(DIGEST_PTR)
170 movdqu STATE0, 1*16(DIGEST_PTR)
175 SYM_FUNC_END(sha256_ni_transform)
177 .section .rodata.cst256.K256, "aM", @progbits, 256
180 .long 0x428a2f98,0x71374491,0xb5c0fbcf,0xe9b5dba5
181 .long 0x3956c25b,0x59f111f1,0x923f82a4,0xab1c5ed5
182 .long 0xd807aa98,0x12835b01,0x243185be,0x550c7dc3
183 .long 0x72be5d74,0x80deb1fe,0x9bdc06a7,0xc19bf174
184 .long 0xe49b69c1,0xefbe4786,0x0fc19dc6,0x240ca1cc
185 .long 0x2de92c6f,0x4a7484aa,0x5cb0a9dc,0x76f988da
186 .long 0x983e5152,0xa831c66d,0xb00327c8,0xbf597fc7
187 .long 0xc6e00bf3,0xd5a79147,0x06ca6351,0x14292967
188 .long 0x27b70a85,0x2e1b2138,0x4d2c6dfc,0x53380d13
189 .long 0x650a7354,0x766a0abb,0x81c2c92e,0x92722c85
190 .long 0xa2bfe8a1,0xa81a664b,0xc24b8b70,0xc76c51a3
191 .long 0xd192e819,0xd6990624,0xf40e3585,0x106aa070
192 .long 0x19a4c116,0x1e376c08,0x2748774c,0x34b0bcb5
193 .long 0x391c0cb3,0x4ed8aa4a,0x5b9cca4f,0x682e6ff3
194 .long 0x748f82ee,0x78a5636f,0x84c87814,0x8cc70208
195 .long 0x90befffa,0xa4506ceb,0xbef9a3f7,0xc67178f2
197 .section .rodata.cst16.PSHUFFLE_BYTE_FLIP_MASK, "aM", @progbits, 16
199 PSHUFFLE_BYTE_FLIP_MASK:
200 .octa 0x0c0d0e0f08090a0b0405060700010203