1/* 2 * sha2-ce-core.S - core SHA-224/SHA-256 transform using v8 Crypto Extensions 3 * 4 * Copyright (C) 2014 Linaro Ltd <ard.biesheuvel@linaro.org> 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License version 2 as 8 * published by the Free Software Foundation. 9 */ 10 11#include <linux/linkage.h> 12#include <asm/assembler.h> 13 14 .text 15 .arch armv8-a+crypto 16 17 dga .req q20 18 dgav .req v20 19 dgb .req q21 20 dgbv .req v21 21 22 t0 .req v22 23 t1 .req v23 24 25 dg0q .req q24 26 dg0v .req v24 27 dg1q .req q25 28 dg1v .req v25 29 dg2q .req q26 30 dg2v .req v26 31 32 .macro add_only, ev, rc, s0 33 mov dg2v.16b, dg0v.16b 34 .ifeq \ev 35 add t1.4s, v\s0\().4s, \rc\().4s 36 sha256h dg0q, dg1q, t0.4s 37 sha256h2 dg1q, dg2q, t0.4s 38 .else 39 .ifnb \s0 40 add t0.4s, v\s0\().4s, \rc\().4s 41 .endif 42 sha256h dg0q, dg1q, t1.4s 43 sha256h2 dg1q, dg2q, t1.4s 44 .endif 45 .endm 46 47 .macro add_update, ev, rc, s0, s1, s2, s3 48 sha256su0 v\s0\().4s, v\s1\().4s 49 add_only \ev, \rc, \s1 50 sha256su1 v\s0\().4s, v\s2\().4s, v\s3\().4s 51 .endm 52 53 /* 54 * The SHA-256 round constants 55 */ 56 .align 4 57.Lsha2_rcon: 58 .word 0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5 59 .word 0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5 60 .word 0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3 61 .word 0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174 62 .word 0xe49b69c1, 0xefbe4786, 0x0fc19dc6, 0x240ca1cc 63 .word 0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da 64 .word 0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7 65 .word 0xc6e00bf3, 0xd5a79147, 0x06ca6351, 0x14292967 66 .word 0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13 67 .word 0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85 68 .word 0xa2bfe8a1, 0xa81a664b, 0xc24b8b70, 0xc76c51a3 69 .word 0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070 70 .word 0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5 71 .word 0x391c0cb3, 0x4ed8aa4a, 0x5b9cca4f, 0x682e6ff3 72 .word 0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208 73 .word 0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2 74 75 /* 76 * void sha2_ce_transform(int blocks, u8 const *src, u32 *state, 77 * u8 *head, long bytes) 78 */ 79ENTRY(sha2_ce_transform) 80 /* load round constants */ 81 adr x8, .Lsha2_rcon 82 ld1 { v0.4s- v3.4s}, [x8], #64 83 ld1 { v4.4s- v7.4s}, [x8], #64 84 ld1 { v8.4s-v11.4s}, [x8], #64 85 ld1 {v12.4s-v15.4s}, [x8] 86 87 /* load state */ 88 ldp dga, dgb, [x2] 89 90 /* load partial input (if supplied) */ 91 cbz x3, 0f 92 ld1 {v16.4s-v19.4s}, [x3] 93 b 1f 94 95 /* load input */ 960: ld1 {v16.4s-v19.4s}, [x1], #64 97 sub w0, w0, #1 98 991: 100CPU_LE( rev32 v16.16b, v16.16b ) 101CPU_LE( rev32 v17.16b, v17.16b ) 102CPU_LE( rev32 v18.16b, v18.16b ) 103CPU_LE( rev32 v19.16b, v19.16b ) 104 1052: add t0.4s, v16.4s, v0.4s 106 mov dg0v.16b, dgav.16b 107 mov dg1v.16b, dgbv.16b 108 109 add_update 0, v1, 16, 17, 18, 19 110 add_update 1, v2, 17, 18, 19, 16 111 add_update 0, v3, 18, 19, 16, 17 112 add_update 1, v4, 19, 16, 17, 18 113 114 add_update 0, v5, 16, 17, 18, 19 115 add_update 1, v6, 17, 18, 19, 16 116 add_update 0, v7, 18, 19, 16, 17 117 add_update 1, v8, 19, 16, 17, 18 118 119 add_update 0, v9, 16, 17, 18, 19 120 add_update 1, v10, 17, 18, 19, 16 121 add_update 0, v11, 18, 19, 16, 17 122 add_update 1, v12, 19, 16, 17, 18 123 124 add_only 0, v13, 17 125 add_only 1, v14, 18 126 add_only 0, v15, 19 127 add_only 1 128 129 /* update state */ 130 add dgav.4s, dgav.4s, dg0v.4s 131 add dgbv.4s, dgbv.4s, dg1v.4s 132 133 /* handled all input blocks? */ 134 cbnz w0, 0b 135 136 /* 137 * Final block: add padding and total bit count. 138 * Skip if we have no total byte count in x4. In that case, the input 139 * size was not a round multiple of the block size, and the padding is 140 * handled by the C code. 141 */ 142 cbz x4, 3f 143 movi v17.2d, #0 144 mov x8, #0x80000000 145 movi v18.2d, #0 146 ror x7, x4, #29 // ror(lsl(x4, 3), 32) 147 fmov d16, x8 148 mov x4, #0 149 mov v19.d[0], xzr 150 mov v19.d[1], x7 151 b 2b 152 153 /* store new state */ 1543: stp dga, dgb, [x2] 155 ret 156ENDPROC(sha2_ce_transform) 157