aes_sse2_impl.c revision 1.4
1 /* $NetBSD: aes_sse2_impl.c,v 1.4 2020/07/25 22:12:57 riastradh Exp $ */ 2 3 /*- 4 * Copyright (c) 2020 The NetBSD Foundation, Inc. 5 * All rights reserved. 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 NETBSD FOUNDATION, INC. AND CONTRIBUTORS 17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 18 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 * POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __KERNEL_RCSID(1, "$NetBSD: aes_sse2_impl.c,v 1.4 2020/07/25 22:12:57 riastradh Exp $"); 31 32 #include <sys/types.h> 33 #include <sys/endian.h> 34 35 #include <crypto/aes/aes.h> 36 #include <crypto/aes/aes_impl.h> 37 #include <crypto/aes/arch/x86/aes_sse2.h> 38 39 #ifdef _KERNEL 40 #include <x86/cpu.h> 41 #include <x86/cpuvar.h> 42 #include <x86/fpu.h> 43 #include <x86/specialreg.h> 44 #else 45 #include <cpuid.h> 46 #define fpu_kern_enter() ((void)0) 47 #define fpu_kern_leave() ((void)0) 48 #endif 49 50 static void 51 aes_sse2_setenckey_impl(struct aesenc *enc, const uint8_t *key, 52 uint32_t nrounds) 53 { 54 55 fpu_kern_enter(); 56 aes_sse2_setkey(enc->aese_aes.aes_rk64, key, nrounds); 57 fpu_kern_leave(); 58 } 59 60 static void 61 aes_sse2_setdeckey_impl(struct aesdec *dec, const uint8_t *key, 62 uint32_t nrounds) 63 { 64 65 fpu_kern_enter(); 66 /* 67 * BearSSL computes InvMixColumns on the fly -- no need for 68 * distinct decryption round keys. 69 */ 70 aes_sse2_setkey(dec->aesd_aes.aes_rk64, key, nrounds); 71 fpu_kern_leave(); 72 } 73 74 static void 75 aes_sse2_enc_impl(const struct aesenc *enc, const uint8_t in[static 16], 76 uint8_t out[static 16], uint32_t nrounds) 77 { 78 79 fpu_kern_enter(); 80 aes_sse2_enc(enc, in, out, nrounds); 81 fpu_kern_leave(); 82 } 83 84 static void 85 aes_sse2_dec_impl(const struct aesdec *dec, const uint8_t in[static 16], 86 uint8_t out[static 16], uint32_t nrounds) 87 { 88 89 fpu_kern_enter(); 90 aes_sse2_dec(dec, in, out, nrounds); 91 fpu_kern_leave(); 92 } 93 94 static void 95 aes_sse2_cbc_enc_impl(const struct aesenc *enc, const uint8_t in[static 16], 96 uint8_t out[static 16], size_t nbytes, uint8_t iv[static 16], 97 uint32_t nrounds) 98 { 99 100 if (nbytes == 0) 101 return; 102 fpu_kern_enter(); 103 aes_sse2_cbc_enc(enc, in, out, nbytes, iv, nrounds); 104 fpu_kern_leave(); 105 } 106 107 static void 108 aes_sse2_cbc_dec_impl(const struct aesdec *dec, const uint8_t in[static 16], 109 uint8_t out[static 16], size_t nbytes, uint8_t iv[static 16], 110 uint32_t nrounds) 111 { 112 113 if (nbytes == 0) 114 return; 115 fpu_kern_enter(); 116 aes_sse2_cbc_dec(dec, in, out, nbytes, iv, nrounds); 117 fpu_kern_leave(); 118 } 119 120 static void 121 aes_sse2_xts_enc_impl(const struct aesenc *enc, const uint8_t in[static 16], 122 uint8_t out[static 16], size_t nbytes, uint8_t tweak[static 16], 123 uint32_t nrounds) 124 { 125 126 if (nbytes == 0) 127 return; 128 fpu_kern_enter(); 129 aes_sse2_xts_enc(enc, in, out, nbytes, tweak, nrounds); 130 fpu_kern_leave(); 131 } 132 133 static void 134 aes_sse2_xts_dec_impl(const struct aesdec *dec, const uint8_t in[static 16], 135 uint8_t out[static 16], size_t nbytes, uint8_t tweak[static 16], 136 uint32_t nrounds) 137 { 138 139 if (nbytes == 0) 140 return; 141 fpu_kern_enter(); 142 aes_sse2_xts_dec(dec, in, out, nbytes, tweak, nrounds); 143 fpu_kern_leave(); 144 } 145 146 static int 147 aes_sse2_probe(void) 148 { 149 int result = 0; 150 151 /* Verify that the CPU supports SSE and SSE2. */ 152 #ifdef _KERNEL 153 if (!i386_has_sse) 154 return -1; 155 if (!i386_has_sse2) 156 return -1; 157 #else 158 unsigned eax, ebx, ecx, edx; 159 if (!__get_cpuid(1, &eax, &ebx, &ecx, &edx)) 160 return -1; 161 if ((edx & bit_SSE) == 0) 162 return -1; 163 if ((edx & bit_SSE2) == 0) 164 return -1; 165 #endif 166 167 fpu_kern_enter(); 168 result = aes_sse2_selftest(); 169 fpu_kern_leave(); 170 171 return result; 172 } 173 174 struct aes_impl aes_sse2_impl = { 175 .ai_name = "Intel SSE2 bitsliced", 176 .ai_probe = aes_sse2_probe, 177 .ai_setenckey = aes_sse2_setenckey_impl, 178 .ai_setdeckey = aes_sse2_setdeckey_impl, 179 .ai_enc = aes_sse2_enc_impl, 180 .ai_dec = aes_sse2_dec_impl, 181 .ai_cbc_enc = aes_sse2_cbc_enc_impl, 182 .ai_cbc_dec = aes_sse2_cbc_dec_impl, 183 .ai_xts_enc = aes_sse2_xts_enc_impl, 184 .ai_xts_dec = aes_sse2_xts_dec_impl, 185 }; 186
Indexes created Wed Oct 01 19:09:53 GMT 2025