1 /*- 2 * Copyright (c) 2021 The FreeBSD Foundation 3 * 4 * This software was developed by Andrew Turner under sponsorship from 5 * the FreeBSD Foundation. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __FBSDID("$FreeBSD$"); 31 32 #include <sys/types.h> 33 34 #include <arm_neon.h> 35 36 #include "sha256c_impl.h" 37 38 void __hidden 39 SHA256_Transform_arm64_impl(uint32_t * state, const unsigned char block[64], 40 const uint32_t K[64]) 41 { 42 uint32x4_t W[4]; 43 uint32x4_t S[2]; 44 uint32x4_t S_start[2]; 45 uint32x4_t K_tmp, S_tmp; 46 int i; 47 48 #define A64_LOAD_W(x) \ 49 W[x] = vld1q_u32((const uint32_t *)(&block[(x) * 16])); \ 50 W[x] = vreinterpretq_u32_u8(vrev32q_u8(vreinterpretq_u8_u32(W[x]))) 51 52 /* 1. Prepare the first part of the message schedule W. */ 53 A64_LOAD_W(0); 54 A64_LOAD_W(1); 55 A64_LOAD_W(2); 56 A64_LOAD_W(3); 57 58 /* 2. Initialize working variables. */ 59 S[0] = vld1q_u32(&state[0]); 60 S[1] = vld1q_u32(&state[4]); 61 62 S_start[0] = S[0]; 63 S_start[1] = S[1]; 64 65 /* 3. Mix. */ 66 for (i = 0; i < 64; i += 16) { 67 #define A64_RNDr(i, ii) \ 68 K_tmp = vaddq_u32(W[i], vld1q_u32(&K[ii + i * 4])); \ 69 S_tmp = vsha256hq_u32(S[0], S[1], K_tmp); \ 70 S[1] = vsha256h2q_u32(S[1], S[0], K_tmp); \ 71 S[0] = S_tmp 72 73 A64_RNDr(0, i); 74 A64_RNDr(1, i); 75 A64_RNDr(2, i); 76 A64_RNDr(3, i); 77 78 if (i == 48) 79 break; 80 81 #define A64_MSCH(x) \ 82 W[x] = vsha256su0q_u32(W[x], W[(x + 1) % 4]); \ 83 W[x] = vsha256su1q_u32(W[x], W[(x + 2) % 4], W[(x + 3) % 4]) 84 85 A64_MSCH(0); 86 A64_MSCH(1); 87 A64_MSCH(2); 88 A64_MSCH(3); 89 } 90 91 /* 4. Mix local working variables into global state */ 92 S[0] = vaddq_u32(S[0], S_start[0]); 93 S[1] = vaddq_u32(S[1], S_start[1]); 94 95 vst1q_u32(&state[0], S[0]); 96 vst1q_u32(&state[4], S[1]); 97 } 98