Austin Blackstone / Mbed 2 deprecated client-lwip-lightswitch-demo-expanded

mbed client lightswitch demo

Dependencies:   mbed Socket lwip-eth lwip-sys lwip

Fork of mbed-client-classic-example-lwip by Austin Blackstone

mbedtls/source/aesni.c@11:cada08fc8a70, 2016-06-09 (annotated)

Committer:
mbedAustin
Date:
Thu Jun 09 17:08:36 2016 +0000
Revision:
11:cada08fc8a70
Commit for public Consumption

Who changed what in which revision?

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mbedAustin 11:cada08fc8a70 1 /*
mbedAustin 11:cada08fc8a70 2 * AES-NI support functions
mbedAustin 11:cada08fc8a70 3 *
mbedAustin 11:cada08fc8a70 4 * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
mbedAustin 11:cada08fc8a70 5 * SPDX-License-Identifier: Apache-2.0
mbedAustin 11:cada08fc8a70 6 *
mbedAustin 11:cada08fc8a70 7 * Licensed under the Apache License, Version 2.0 (the "License"); you may
mbedAustin 11:cada08fc8a70 8 * not use this file except in compliance with the License.
mbedAustin 11:cada08fc8a70 9 * You may obtain a copy of the License at
mbedAustin 11:cada08fc8a70 10 *
mbedAustin 11:cada08fc8a70 11 * http://www.apache.org/licenses/LICENSE-2.0
mbedAustin 11:cada08fc8a70 12 *
mbedAustin 11:cada08fc8a70 13 * Unless required by applicable law or agreed to in writing, software
mbedAustin 11:cada08fc8a70 14 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
mbedAustin 11:cada08fc8a70 15 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
mbedAustin 11:cada08fc8a70 16 * See the License for the specific language governing permissions and
mbedAustin 11:cada08fc8a70 17 * limitations under the License.
mbedAustin 11:cada08fc8a70 18 *
mbedAustin 11:cada08fc8a70 19 * This file is part of mbed TLS (https://tls.mbed.org)
mbedAustin 11:cada08fc8a70 20 */
mbedAustin 11:cada08fc8a70 21
mbedAustin 11:cada08fc8a70 22 /*
mbedAustin 11:cada08fc8a70 23 * [AES-WP] http://software.intel.com/en-us/articles/intel-advanced-encryption-standard-aes-instructions-set
mbedAustin 11:cada08fc8a70 24 * [CLMUL-WP] http://software.intel.com/en-us/articles/intel-carry-less-multiplication-instruction-and-its-usage-for-computing-the-gcm-mode/
mbedAustin 11:cada08fc8a70 25 */
mbedAustin 11:cada08fc8a70 26
mbedAustin 11:cada08fc8a70 27 #if !defined(MBEDTLS_CONFIG_FILE)
mbedAustin 11:cada08fc8a70 28 #include "mbedtls/config.h"
mbedAustin 11:cada08fc8a70 29 #else
mbedAustin 11:cada08fc8a70 30 #include MBEDTLS_CONFIG_FILE
mbedAustin 11:cada08fc8a70 31 #endif
mbedAustin 11:cada08fc8a70 32
mbedAustin 11:cada08fc8a70 33 #if defined(MBEDTLS_AESNI_C)
mbedAustin 11:cada08fc8a70 34
mbedAustin 11:cada08fc8a70 35 #include "mbedtls/aesni.h"
mbedAustin 11:cada08fc8a70 36
mbedAustin 11:cada08fc8a70 37 #include <string.h>
mbedAustin 11:cada08fc8a70 38
mbedAustin 11:cada08fc8a70 39 #ifndef asm
mbedAustin 11:cada08fc8a70 40 #define asm __asm
mbedAustin 11:cada08fc8a70 41 #endif
mbedAustin 11:cada08fc8a70 42
mbedAustin 11:cada08fc8a70 43 #if defined(MBEDTLS_HAVE_X86_64)
mbedAustin 11:cada08fc8a70 44
mbedAustin 11:cada08fc8a70 45 /*
mbedAustin 11:cada08fc8a70 46 * AES-NI support detection routine
mbedAustin 11:cada08fc8a70 47 */
mbedAustin 11:cada08fc8a70 48 int mbedtls_aesni_has_support( unsigned int what )
mbedAustin 11:cada08fc8a70 49 {
mbedAustin 11:cada08fc8a70 50 static int done = 0;
mbedAustin 11:cada08fc8a70 51 static unsigned int c = 0;
mbedAustin 11:cada08fc8a70 52
mbedAustin 11:cada08fc8a70 53 if( ! done )
mbedAustin 11:cada08fc8a70 54 {
mbedAustin 11:cada08fc8a70 55 asm( "movl $1, %%eax \n\t"
mbedAustin 11:cada08fc8a70 56 "cpuid \n\t"
mbedAustin 11:cada08fc8a70 57 : "=c" (c)
mbedAustin 11:cada08fc8a70 58 :
mbedAustin 11:cada08fc8a70 59 : "eax", "ebx", "edx" );
mbedAustin 11:cada08fc8a70 60 done = 1;
mbedAustin 11:cada08fc8a70 61 }
mbedAustin 11:cada08fc8a70 62
mbedAustin 11:cada08fc8a70 63 return( ( c & what ) != 0 );
mbedAustin 11:cada08fc8a70 64 }
mbedAustin 11:cada08fc8a70 65
mbedAustin 11:cada08fc8a70 66 /*
mbedAustin 11:cada08fc8a70 67 * Binutils needs to be at least 2.19 to support AES-NI instructions.
mbedAustin 11:cada08fc8a70 68 * Unfortunately, a lot of users have a lower version now (2014-04).
mbedAustin 11:cada08fc8a70 69 * Emit bytecode directly in order to support "old" version of gas.
mbedAustin 11:cada08fc8a70 70 *
mbedAustin 11:cada08fc8a70 71 * Opcodes from the Intel architecture reference manual, vol. 3.
mbedAustin 11:cada08fc8a70 72 * We always use registers, so we don't need prefixes for memory operands.
mbedAustin 11:cada08fc8a70 73 * Operand macros are in gas order (src, dst) as opposed to Intel order
mbedAustin 11:cada08fc8a70 74 * (dst, src) in order to blend better into the surrounding assembly code.
mbedAustin 11:cada08fc8a70 75 */
mbedAustin 11:cada08fc8a70 76 #define AESDEC ".byte 0x66,0x0F,0x38,0xDE,"
mbedAustin 11:cada08fc8a70 77 #define AESDECLAST ".byte 0x66,0x0F,0x38,0xDF,"
mbedAustin 11:cada08fc8a70 78 #define AESENC ".byte 0x66,0x0F,0x38,0xDC,"
mbedAustin 11:cada08fc8a70 79 #define AESENCLAST ".byte 0x66,0x0F,0x38,0xDD,"
mbedAustin 11:cada08fc8a70 80 #define AESIMC ".byte 0x66,0x0F,0x38,0xDB,"
mbedAustin 11:cada08fc8a70 81 #define AESKEYGENA ".byte 0x66,0x0F,0x3A,0xDF,"
mbedAustin 11:cada08fc8a70 82 #define PCLMULQDQ ".byte 0x66,0x0F,0x3A,0x44,"
mbedAustin 11:cada08fc8a70 83
mbedAustin 11:cada08fc8a70 84 #define xmm0_xmm0 "0xC0"
mbedAustin 11:cada08fc8a70 85 #define xmm0_xmm1 "0xC8"
mbedAustin 11:cada08fc8a70 86 #define xmm0_xmm2 "0xD0"
mbedAustin 11:cada08fc8a70 87 #define xmm0_xmm3 "0xD8"
mbedAustin 11:cada08fc8a70 88 #define xmm0_xmm4 "0xE0"
mbedAustin 11:cada08fc8a70 89 #define xmm1_xmm0 "0xC1"
mbedAustin 11:cada08fc8a70 90 #define xmm1_xmm2 "0xD1"
mbedAustin 11:cada08fc8a70 91
mbedAustin 11:cada08fc8a70 92 /*
mbedAustin 11:cada08fc8a70 93 * AES-NI AES-ECB block en(de)cryption
mbedAustin 11:cada08fc8a70 94 */
mbedAustin 11:cada08fc8a70 95 int mbedtls_aesni_crypt_ecb( mbedtls_aes_context *ctx,
mbedAustin 11:cada08fc8a70 96 int mode,
mbedAustin 11:cada08fc8a70 97 const unsigned char input[16],
mbedAustin 11:cada08fc8a70 98 unsigned char output[16] )
mbedAustin 11:cada08fc8a70 99 {
mbedAustin 11:cada08fc8a70 100 asm( "movdqu (%3), %%xmm0 \n\t" // load input
mbedAustin 11:cada08fc8a70 101 "movdqu (%1), %%xmm1 \n\t" // load round key 0
mbedAustin 11:cada08fc8a70 102 "pxor %%xmm1, %%xmm0 \n\t" // round 0
mbedAustin 11:cada08fc8a70 103 "addq $16, %1 \n\t" // point to next round key
mbedAustin 11:cada08fc8a70 104 "subl $1, %0 \n\t" // normal rounds = nr - 1
mbedAustin 11:cada08fc8a70 105 "test %2, %2 \n\t" // mode?
mbedAustin 11:cada08fc8a70 106 "jz 2f \n\t" // 0 = decrypt
mbedAustin 11:cada08fc8a70 107
mbedAustin 11:cada08fc8a70 108 "1: \n\t" // encryption loop
mbedAustin 11:cada08fc8a70 109 "movdqu (%1), %%xmm1 \n\t" // load round key
mbedAustin 11:cada08fc8a70 110 AESENC xmm1_xmm0 "\n\t" // do round
mbedAustin 11:cada08fc8a70 111 "addq $16, %1 \n\t" // point to next round key
mbedAustin 11:cada08fc8a70 112 "subl $1, %0 \n\t" // loop
mbedAustin 11:cada08fc8a70 113 "jnz 1b \n\t"
mbedAustin 11:cada08fc8a70 114 "movdqu (%1), %%xmm1 \n\t" // load round key
mbedAustin 11:cada08fc8a70 115 AESENCLAST xmm1_xmm0 "\n\t" // last round
mbedAustin 11:cada08fc8a70 116 "jmp 3f \n\t"
mbedAustin 11:cada08fc8a70 117
mbedAustin 11:cada08fc8a70 118 "2: \n\t" // decryption loop
mbedAustin 11:cada08fc8a70 119 "movdqu (%1), %%xmm1 \n\t"
mbedAustin 11:cada08fc8a70 120 AESDEC xmm1_xmm0 "\n\t" // do round
mbedAustin 11:cada08fc8a70 121 "addq $16, %1 \n\t"
mbedAustin 11:cada08fc8a70 122 "subl $1, %0 \n\t"
mbedAustin 11:cada08fc8a70 123 "jnz 2b \n\t"
mbedAustin 11:cada08fc8a70 124 "movdqu (%1), %%xmm1 \n\t" // load round key
mbedAustin 11:cada08fc8a70 125 AESDECLAST xmm1_xmm0 "\n\t" // last round
mbedAustin 11:cada08fc8a70 126
mbedAustin 11:cada08fc8a70 127 "3: \n\t"
mbedAustin 11:cada08fc8a70 128 "movdqu %%xmm0, (%4) \n\t" // export output
mbedAustin 11:cada08fc8a70 129 :
mbedAustin 11:cada08fc8a70 130 : "r" (ctx->nr), "r" (ctx->rk), "r" (mode), "r" (input), "r" (output)
mbedAustin 11:cada08fc8a70 131 : "memory", "cc", "xmm0", "xmm1" );
mbedAustin 11:cada08fc8a70 132
mbedAustin 11:cada08fc8a70 133
mbedAustin 11:cada08fc8a70 134 return( 0 );
mbedAustin 11:cada08fc8a70 135 }
mbedAustin 11:cada08fc8a70 136
mbedAustin 11:cada08fc8a70 137 /*
mbedAustin 11:cada08fc8a70 138 * GCM multiplication: c = a times b in GF(2^128)
mbedAustin 11:cada08fc8a70 139 * Based on [CLMUL-WP] algorithms 1 (with equation 27) and 5.
mbedAustin 11:cada08fc8a70 140 */
mbedAustin 11:cada08fc8a70 141 void mbedtls_aesni_gcm_mult( unsigned char c[16],
mbedAustin 11:cada08fc8a70 142 const unsigned char a[16],
mbedAustin 11:cada08fc8a70 143 const unsigned char b[16] )
mbedAustin 11:cada08fc8a70 144 {
mbedAustin 11:cada08fc8a70 145 unsigned char aa[16], bb[16], cc[16];
mbedAustin 11:cada08fc8a70 146 size_t i;
mbedAustin 11:cada08fc8a70 147
mbedAustin 11:cada08fc8a70 148 /* The inputs are in big-endian order, so byte-reverse them */
mbedAustin 11:cada08fc8a70 149 for( i = 0; i < 16; i++ )
mbedAustin 11:cada08fc8a70 150 {
mbedAustin 11:cada08fc8a70 151 aa[i] = a[15 - i];
mbedAustin 11:cada08fc8a70 152 bb[i] = b[15 - i];
mbedAustin 11:cada08fc8a70 153 }
mbedAustin 11:cada08fc8a70 154
mbedAustin 11:cada08fc8a70 155 asm( "movdqu (%0), %%xmm0 \n\t" // a1:a0
mbedAustin 11:cada08fc8a70 156 "movdqu (%1), %%xmm1 \n\t" // b1:b0
mbedAustin 11:cada08fc8a70 157
mbedAustin 11:cada08fc8a70 158 /*
mbedAustin 11:cada08fc8a70 159 * Caryless multiplication xmm2:xmm1 = xmm0 * xmm1
mbedAustin 11:cada08fc8a70 160 * using [CLMUL-WP] algorithm 1 (p. 13).
mbedAustin 11:cada08fc8a70 161 */
mbedAustin 11:cada08fc8a70 162 "movdqa %%xmm1, %%xmm2 \n\t" // copy of b1:b0
mbedAustin 11:cada08fc8a70 163 "movdqa %%xmm1, %%xmm3 \n\t" // same
mbedAustin 11:cada08fc8a70 164 "movdqa %%xmm1, %%xmm4 \n\t" // same
mbedAustin 11:cada08fc8a70 165 PCLMULQDQ xmm0_xmm1 ",0x00 \n\t" // a0*b0 = c1:c0
mbedAustin 11:cada08fc8a70 166 PCLMULQDQ xmm0_xmm2 ",0x11 \n\t" // a1*b1 = d1:d0
mbedAustin 11:cada08fc8a70 167 PCLMULQDQ xmm0_xmm3 ",0x10 \n\t" // a0*b1 = e1:e0
mbedAustin 11:cada08fc8a70 168 PCLMULQDQ xmm0_xmm4 ",0x01 \n\t" // a1*b0 = f1:f0
mbedAustin 11:cada08fc8a70 169 "pxor %%xmm3, %%xmm4 \n\t" // e1+f1:e0+f0
mbedAustin 11:cada08fc8a70 170 "movdqa %%xmm4, %%xmm3 \n\t" // same
mbedAustin 11:cada08fc8a70 171 "psrldq $8, %%xmm4 \n\t" // 0:e1+f1
mbedAustin 11:cada08fc8a70 172 "pslldq $8, %%xmm3 \n\t" // e0+f0:0
mbedAustin 11:cada08fc8a70 173 "pxor %%xmm4, %%xmm2 \n\t" // d1:d0+e1+f1
mbedAustin 11:cada08fc8a70 174 "pxor %%xmm3, %%xmm1 \n\t" // c1+e0+f1:c0
mbedAustin 11:cada08fc8a70 175
mbedAustin 11:cada08fc8a70 176 /*
mbedAustin 11:cada08fc8a70 177 * Now shift the result one bit to the left,
mbedAustin 11:cada08fc8a70 178 * taking advantage of [CLMUL-WP] eq 27 (p. 20)
mbedAustin 11:cada08fc8a70 179 */
mbedAustin 11:cada08fc8a70 180 "movdqa %%xmm1, %%xmm3 \n\t" // r1:r0
mbedAustin 11:cada08fc8a70 181 "movdqa %%xmm2, %%xmm4 \n\t" // r3:r2
mbedAustin 11:cada08fc8a70 182 "psllq $1, %%xmm1 \n\t" // r1<<1:r0<<1
mbedAustin 11:cada08fc8a70 183 "psllq $1, %%xmm2 \n\t" // r3<<1:r2<<1
mbedAustin 11:cada08fc8a70 184 "psrlq $63, %%xmm3 \n\t" // r1>>63:r0>>63
mbedAustin 11:cada08fc8a70 185 "psrlq $63, %%xmm4 \n\t" // r3>>63:r2>>63
mbedAustin 11:cada08fc8a70 186 "movdqa %%xmm3, %%xmm5 \n\t" // r1>>63:r0>>63
mbedAustin 11:cada08fc8a70 187 "pslldq $8, %%xmm3 \n\t" // r0>>63:0
mbedAustin 11:cada08fc8a70 188 "pslldq $8, %%xmm4 \n\t" // r2>>63:0
mbedAustin 11:cada08fc8a70 189 "psrldq $8, %%xmm5 \n\t" // 0:r1>>63
mbedAustin 11:cada08fc8a70 190 "por %%xmm3, %%xmm1 \n\t" // r1<<1|r0>>63:r0<<1
mbedAustin 11:cada08fc8a70 191 "por %%xmm4, %%xmm2 \n\t" // r3<<1|r2>>62:r2<<1
mbedAustin 11:cada08fc8a70 192 "por %%xmm5, %%xmm2 \n\t" // r3<<1|r2>>62:r2<<1|r1>>63
mbedAustin 11:cada08fc8a70 193
mbedAustin 11:cada08fc8a70 194 /*
mbedAustin 11:cada08fc8a70 195 * Now reduce modulo the GCM polynomial x^128 + x^7 + x^2 + x + 1
mbedAustin 11:cada08fc8a70 196 * using [CLMUL-WP] algorithm 5 (p. 20).
mbedAustin 11:cada08fc8a70 197 * Currently xmm2:xmm1 holds x3:x2:x1:x0 (already shifted).
mbedAustin 11:cada08fc8a70 198 */
mbedAustin 11:cada08fc8a70 199 /* Step 2 (1) */
mbedAustin 11:cada08fc8a70 200 "movdqa %%xmm1, %%xmm3 \n\t" // x1:x0
mbedAustin 11:cada08fc8a70 201 "movdqa %%xmm1, %%xmm4 \n\t" // same
mbedAustin 11:cada08fc8a70 202 "movdqa %%xmm1, %%xmm5 \n\t" // same
mbedAustin 11:cada08fc8a70 203 "psllq $63, %%xmm3 \n\t" // x1<<63:x0<<63 = stuff:a
mbedAustin 11:cada08fc8a70 204 "psllq $62, %%xmm4 \n\t" // x1<<62:x0<<62 = stuff:b
mbedAustin 11:cada08fc8a70 205 "psllq $57, %%xmm5 \n\t" // x1<<57:x0<<57 = stuff:c
mbedAustin 11:cada08fc8a70 206
mbedAustin 11:cada08fc8a70 207 /* Step 2 (2) */
mbedAustin 11:cada08fc8a70 208 "pxor %%xmm4, %%xmm3 \n\t" // stuff:a+b
mbedAustin 11:cada08fc8a70 209 "pxor %%xmm5, %%xmm3 \n\t" // stuff:a+b+c
mbedAustin 11:cada08fc8a70 210 "pslldq $8, %%xmm3 \n\t" // a+b+c:0
mbedAustin 11:cada08fc8a70 211 "pxor %%xmm3, %%xmm1 \n\t" // x1+a+b+c:x0 = d:x0
mbedAustin 11:cada08fc8a70 212
mbedAustin 11:cada08fc8a70 213 /* Steps 3 and 4 */
mbedAustin 11:cada08fc8a70 214 "movdqa %%xmm1,%%xmm0 \n\t" // d:x0
mbedAustin 11:cada08fc8a70 215 "movdqa %%xmm1,%%xmm4 \n\t" // same
mbedAustin 11:cada08fc8a70 216 "movdqa %%xmm1,%%xmm5 \n\t" // same
mbedAustin 11:cada08fc8a70 217 "psrlq $1, %%xmm0 \n\t" // e1:x0>>1 = e1:e0'
mbedAustin 11:cada08fc8a70 218 "psrlq $2, %%xmm4 \n\t" // f1:x0>>2 = f1:f0'
mbedAustin 11:cada08fc8a70 219 "psrlq $7, %%xmm5 \n\t" // g1:x0>>7 = g1:g0'
mbedAustin 11:cada08fc8a70 220 "pxor %%xmm4, %%xmm0 \n\t" // e1+f1:e0'+f0'
mbedAustin 11:cada08fc8a70 221 "pxor %%xmm5, %%xmm0 \n\t" // e1+f1+g1:e0'+f0'+g0'
mbedAustin 11:cada08fc8a70 222 // e0'+f0'+g0' is almost e0+f0+g0, ex\tcept for some missing
mbedAustin 11:cada08fc8a70 223 // bits carried from d. Now get those\t bits back in.
mbedAustin 11:cada08fc8a70 224 "movdqa %%xmm1,%%xmm3 \n\t" // d:x0
mbedAustin 11:cada08fc8a70 225 "movdqa %%xmm1,%%xmm4 \n\t" // same
mbedAustin 11:cada08fc8a70 226 "movdqa %%xmm1,%%xmm5 \n\t" // same
mbedAustin 11:cada08fc8a70 227 "psllq $63, %%xmm3 \n\t" // d<<63:stuff
mbedAustin 11:cada08fc8a70 228 "psllq $62, %%xmm4 \n\t" // d<<62:stuff
mbedAustin 11:cada08fc8a70 229 "psllq $57, %%xmm5 \n\t" // d<<57:stuff
mbedAustin 11:cada08fc8a70 230 "pxor %%xmm4, %%xmm3 \n\t" // d<<63+d<<62:stuff
mbedAustin 11:cada08fc8a70 231 "pxor %%xmm5, %%xmm3 \n\t" // missing bits of d:stuff
mbedAustin 11:cada08fc8a70 232 "psrldq $8, %%xmm3 \n\t" // 0:missing bits of d
mbedAustin 11:cada08fc8a70 233 "pxor %%xmm3, %%xmm0 \n\t" // e1+f1+g1:e0+f0+g0
mbedAustin 11:cada08fc8a70 234 "pxor %%xmm1, %%xmm0 \n\t" // h1:h0
mbedAustin 11:cada08fc8a70 235 "pxor %%xmm2, %%xmm0 \n\t" // x3+h1:x2+h0
mbedAustin 11:cada08fc8a70 236
mbedAustin 11:cada08fc8a70 237 "movdqu %%xmm0, (%2) \n\t" // done
mbedAustin 11:cada08fc8a70 238 :
mbedAustin 11:cada08fc8a70 239 : "r" (aa), "r" (bb), "r" (cc)
mbedAustin 11:cada08fc8a70 240 : "memory", "cc", "xmm0", "xmm1", "xmm2", "xmm3", "xmm4", "xmm5" );
mbedAustin 11:cada08fc8a70 241
mbedAustin 11:cada08fc8a70 242 /* Now byte-reverse the outputs */
mbedAustin 11:cada08fc8a70 243 for( i = 0; i < 16; i++ )
mbedAustin 11:cada08fc8a70 244 c[i] = cc[15 - i];
mbedAustin 11:cada08fc8a70 245
mbedAustin 11:cada08fc8a70 246 return;
mbedAustin 11:cada08fc8a70 247 }
mbedAustin 11:cada08fc8a70 248
mbedAustin 11:cada08fc8a70 249 /*
mbedAustin 11:cada08fc8a70 250 * Compute decryption round keys from encryption round keys
mbedAustin 11:cada08fc8a70 251 */
mbedAustin 11:cada08fc8a70 252 void mbedtls_aesni_inverse_key( unsigned char *invkey,
mbedAustin 11:cada08fc8a70 253 const unsigned char *fwdkey, int nr )
mbedAustin 11:cada08fc8a70 254 {
mbedAustin 11:cada08fc8a70 255 unsigned char *ik = invkey;
mbedAustin 11:cada08fc8a70 256 const unsigned char *fk = fwdkey + 16 * nr;
mbedAustin 11:cada08fc8a70 257
mbedAustin 11:cada08fc8a70 258 memcpy( ik, fk, 16 );
mbedAustin 11:cada08fc8a70 259
mbedAustin 11:cada08fc8a70 260 for( fk -= 16, ik += 16; fk > fwdkey; fk -= 16, ik += 16 )
mbedAustin 11:cada08fc8a70 261 asm( "movdqu (%0), %%xmm0 \n\t"
mbedAustin 11:cada08fc8a70 262 AESIMC xmm0_xmm0 "\n\t"
mbedAustin 11:cada08fc8a70 263 "movdqu %%xmm0, (%1) \n\t"
mbedAustin 11:cada08fc8a70 264 :
mbedAustin 11:cada08fc8a70 265 : "r" (fk), "r" (ik)
mbedAustin 11:cada08fc8a70 266 : "memory", "xmm0" );
mbedAustin 11:cada08fc8a70 267
mbedAustin 11:cada08fc8a70 268 memcpy( ik, fk, 16 );
mbedAustin 11:cada08fc8a70 269 }
mbedAustin 11:cada08fc8a70 270
mbedAustin 11:cada08fc8a70 271 /*
mbedAustin 11:cada08fc8a70 272 * Key expansion, 128-bit case
mbedAustin 11:cada08fc8a70 273 */
mbedAustin 11:cada08fc8a70 274 static void aesni_setkey_enc_128( unsigned char *rk,
mbedAustin 11:cada08fc8a70 275 const unsigned char *key )
mbedAustin 11:cada08fc8a70 276 {
mbedAustin 11:cada08fc8a70 277 asm( "movdqu (%1), %%xmm0 \n\t" // copy the original key
mbedAustin 11:cada08fc8a70 278 "movdqu %%xmm0, (%0) \n\t" // as round key 0
mbedAustin 11:cada08fc8a70 279 "jmp 2f \n\t" // skip auxiliary routine
mbedAustin 11:cada08fc8a70 280
mbedAustin 11:cada08fc8a70 281 /*
mbedAustin 11:cada08fc8a70 282 * Finish generating the next round key.
mbedAustin 11:cada08fc8a70 283 *
mbedAustin 11:cada08fc8a70 284 * On entry xmm0 is r3:r2:r1:r0 and xmm1 is X:stuff:stuff:stuff
mbedAustin 11:cada08fc8a70 285 * with X = rot( sub( r3 ) ) ^ RCON.
mbedAustin 11:cada08fc8a70 286 *
mbedAustin 11:cada08fc8a70 287 * On exit, xmm0 is r7:r6:r5:r4
mbedAustin 11:cada08fc8a70 288 * with r4 = X + r0, r5 = r4 + r1, r6 = r5 + r2, r7 = r6 + r3
mbedAustin 11:cada08fc8a70 289 * and those are written to the round key buffer.
mbedAustin 11:cada08fc8a70 290 */
mbedAustin 11:cada08fc8a70 291 "1: \n\t"
mbedAustin 11:cada08fc8a70 292 "pshufd $0xff, %%xmm1, %%xmm1 \n\t" // X:X:X:X
mbedAustin 11:cada08fc8a70 293 "pxor %%xmm0, %%xmm1 \n\t" // X+r3:X+r2:X+r1:r4
mbedAustin 11:cada08fc8a70 294 "pslldq $4, %%xmm0 \n\t" // r2:r1:r0:0
mbedAustin 11:cada08fc8a70 295 "pxor %%xmm0, %%xmm1 \n\t" // X+r3+r2:X+r2+r1:r5:r4
mbedAustin 11:cada08fc8a70 296 "pslldq $4, %%xmm0 \n\t" // etc
mbedAustin 11:cada08fc8a70 297 "pxor %%xmm0, %%xmm1 \n\t"
mbedAustin 11:cada08fc8a70 298 "pslldq $4, %%xmm0 \n\t"
mbedAustin 11:cada08fc8a70 299 "pxor %%xmm1, %%xmm0 \n\t" // update xmm0 for next time!
mbedAustin 11:cada08fc8a70 300 "add $16, %0 \n\t" // point to next round key
mbedAustin 11:cada08fc8a70 301 "movdqu %%xmm0, (%0) \n\t" // write it
mbedAustin 11:cada08fc8a70 302 "ret \n\t"
mbedAustin 11:cada08fc8a70 303
mbedAustin 11:cada08fc8a70 304 /* Main "loop" */
mbedAustin 11:cada08fc8a70 305 "2: \n\t"
mbedAustin 11:cada08fc8a70 306 AESKEYGENA xmm0_xmm1 ",0x01 \n\tcall 1b \n\t"
mbedAustin 11:cada08fc8a70 307 AESKEYGENA xmm0_xmm1 ",0x02 \n\tcall 1b \n\t"
mbedAustin 11:cada08fc8a70 308 AESKEYGENA xmm0_xmm1 ",0x04 \n\tcall 1b \n\t"
mbedAustin 11:cada08fc8a70 309 AESKEYGENA xmm0_xmm1 ",0x08 \n\tcall 1b \n\t"
mbedAustin 11:cada08fc8a70 310 AESKEYGENA xmm0_xmm1 ",0x10 \n\tcall 1b \n\t"
mbedAustin 11:cada08fc8a70 311 AESKEYGENA xmm0_xmm1 ",0x20 \n\tcall 1b \n\t"
mbedAustin 11:cada08fc8a70 312 AESKEYGENA xmm0_xmm1 ",0x40 \n\tcall 1b \n\t"
mbedAustin 11:cada08fc8a70 313 AESKEYGENA xmm0_xmm1 ",0x80 \n\tcall 1b \n\t"
mbedAustin 11:cada08fc8a70 314 AESKEYGENA xmm0_xmm1 ",0x1B \n\tcall 1b \n\t"
mbedAustin 11:cada08fc8a70 315 AESKEYGENA xmm0_xmm1 ",0x36 \n\tcall 1b \n\t"
mbedAustin 11:cada08fc8a70 316 :
mbedAustin 11:cada08fc8a70 317 : "r" (rk), "r" (key)
mbedAustin 11:cada08fc8a70 318 : "memory", "cc", "0" );
mbedAustin 11:cada08fc8a70 319 }
mbedAustin 11:cada08fc8a70 320
mbedAustin 11:cada08fc8a70 321 /*
mbedAustin 11:cada08fc8a70 322 * Key expansion, 192-bit case
mbedAustin 11:cada08fc8a70 323 */
mbedAustin 11:cada08fc8a70 324 static void aesni_setkey_enc_192( unsigned char *rk,
mbedAustin 11:cada08fc8a70 325 const unsigned char *key )
mbedAustin 11:cada08fc8a70 326 {
mbedAustin 11:cada08fc8a70 327 asm( "movdqu (%1), %%xmm0 \n\t" // copy original round key
mbedAustin 11:cada08fc8a70 328 "movdqu %%xmm0, (%0) \n\t"
mbedAustin 11:cada08fc8a70 329 "add $16, %0 \n\t"
mbedAustin 11:cada08fc8a70 330 "movq 16(%1), %%xmm1 \n\t"
mbedAustin 11:cada08fc8a70 331 "movq %%xmm1, (%0) \n\t"
mbedAustin 11:cada08fc8a70 332 "add $8, %0 \n\t"
mbedAustin 11:cada08fc8a70 333 "jmp 2f \n\t" // skip auxiliary routine
mbedAustin 11:cada08fc8a70 334
mbedAustin 11:cada08fc8a70 335 /*
mbedAustin 11:cada08fc8a70 336 * Finish generating the next 6 quarter-keys.
mbedAustin 11:cada08fc8a70 337 *
mbedAustin 11:cada08fc8a70 338 * On entry xmm0 is r3:r2:r1:r0, xmm1 is stuff:stuff:r5:r4
mbedAustin 11:cada08fc8a70 339 * and xmm2 is stuff:stuff:X:stuff with X = rot( sub( r3 ) ) ^ RCON.
mbedAustin 11:cada08fc8a70 340 *
mbedAustin 11:cada08fc8a70 341 * On exit, xmm0 is r9:r8:r7:r6 and xmm1 is stuff:stuff:r11:r10
mbedAustin 11:cada08fc8a70 342 * and those are written to the round key buffer.
mbedAustin 11:cada08fc8a70 343 */
mbedAustin 11:cada08fc8a70 344 "1: \n\t"
mbedAustin 11:cada08fc8a70 345 "pshufd $0x55, %%xmm2, %%xmm2 \n\t" // X:X:X:X
mbedAustin 11:cada08fc8a70 346 "pxor %%xmm0, %%xmm2 \n\t" // X+r3:X+r2:X+r1:r4
mbedAustin 11:cada08fc8a70 347 "pslldq $4, %%xmm0 \n\t" // etc
mbedAustin 11:cada08fc8a70 348 "pxor %%xmm0, %%xmm2 \n\t"
mbedAustin 11:cada08fc8a70 349 "pslldq $4, %%xmm0 \n\t"
mbedAustin 11:cada08fc8a70 350 "pxor %%xmm0, %%xmm2 \n\t"
mbedAustin 11:cada08fc8a70 351 "pslldq $4, %%xmm0 \n\t"
mbedAustin 11:cada08fc8a70 352 "pxor %%xmm2, %%xmm0 \n\t" // update xmm0 = r9:r8:r7:r6
mbedAustin 11:cada08fc8a70 353 "movdqu %%xmm0, (%0) \n\t"
mbedAustin 11:cada08fc8a70 354 "add $16, %0 \n\t"
mbedAustin 11:cada08fc8a70 355 "pshufd $0xff, %%xmm0, %%xmm2 \n\t" // r9:r9:r9:r9
mbedAustin 11:cada08fc8a70 356 "pxor %%xmm1, %%xmm2 \n\t" // stuff:stuff:r9+r5:r10
mbedAustin 11:cada08fc8a70 357 "pslldq $4, %%xmm1 \n\t" // r2:r1:r0:0
mbedAustin 11:cada08fc8a70 358 "pxor %%xmm2, %%xmm1 \n\t" // xmm1 = stuff:stuff:r11:r10
mbedAustin 11:cada08fc8a70 359 "movq %%xmm1, (%0) \n\t"
mbedAustin 11:cada08fc8a70 360 "add $8, %0 \n\t"
mbedAustin 11:cada08fc8a70 361 "ret \n\t"
mbedAustin 11:cada08fc8a70 362
mbedAustin 11:cada08fc8a70 363 "2: \n\t"
mbedAustin 11:cada08fc8a70 364 AESKEYGENA xmm1_xmm2 ",0x01 \n\tcall 1b \n\t"
mbedAustin 11:cada08fc8a70 365 AESKEYGENA xmm1_xmm2 ",0x02 \n\tcall 1b \n\t"
mbedAustin 11:cada08fc8a70 366 AESKEYGENA xmm1_xmm2 ",0x04 \n\tcall 1b \n\t"
mbedAustin 11:cada08fc8a70 367 AESKEYGENA xmm1_xmm2 ",0x08 \n\tcall 1b \n\t"
mbedAustin 11:cada08fc8a70 368 AESKEYGENA xmm1_xmm2 ",0x10 \n\tcall 1b \n\t"
mbedAustin 11:cada08fc8a70 369 AESKEYGENA xmm1_xmm2 ",0x20 \n\tcall 1b \n\t"
mbedAustin 11:cada08fc8a70 370 AESKEYGENA xmm1_xmm2 ",0x40 \n\tcall 1b \n\t"
mbedAustin 11:cada08fc8a70 371 AESKEYGENA xmm1_xmm2 ",0x80 \n\tcall 1b \n\t"
mbedAustin 11:cada08fc8a70 372
mbedAustin 11:cada08fc8a70 373 :
mbedAustin 11:cada08fc8a70 374 : "r" (rk), "r" (key)
mbedAustin 11:cada08fc8a70 375 : "memory", "cc", "0" );
mbedAustin 11:cada08fc8a70 376 }
mbedAustin 11:cada08fc8a70 377
mbedAustin 11:cada08fc8a70 378 /*
mbedAustin 11:cada08fc8a70 379 * Key expansion, 256-bit case
mbedAustin 11:cada08fc8a70 380 */
mbedAustin 11:cada08fc8a70 381 static void aesni_setkey_enc_256( unsigned char *rk,
mbedAustin 11:cada08fc8a70 382 const unsigned char *key )
mbedAustin 11:cada08fc8a70 383 {
mbedAustin 11:cada08fc8a70 384 asm( "movdqu (%1), %%xmm0 \n\t"
mbedAustin 11:cada08fc8a70 385 "movdqu %%xmm0, (%0) \n\t"
mbedAustin 11:cada08fc8a70 386 "add $16, %0 \n\t"
mbedAustin 11:cada08fc8a70 387 "movdqu 16(%1), %%xmm1 \n\t"
mbedAustin 11:cada08fc8a70 388 "movdqu %%xmm1, (%0) \n\t"
mbedAustin 11:cada08fc8a70 389 "jmp 2f \n\t" // skip auxiliary routine
mbedAustin 11:cada08fc8a70 390
mbedAustin 11:cada08fc8a70 391 /*
mbedAustin 11:cada08fc8a70 392 * Finish generating the next two round keys.
mbedAustin 11:cada08fc8a70 393 *
mbedAustin 11:cada08fc8a70 394 * On entry xmm0 is r3:r2:r1:r0, xmm1 is r7:r6:r5:r4 and
mbedAustin 11:cada08fc8a70 395 * xmm2 is X:stuff:stuff:stuff with X = rot( sub( r7 )) ^ RCON
mbedAustin 11:cada08fc8a70 396 *
mbedAustin 11:cada08fc8a70 397 * On exit, xmm0 is r11:r10:r9:r8 and xmm1 is r15:r14:r13:r12
mbedAustin 11:cada08fc8a70 398 * and those have been written to the output buffer.
mbedAustin 11:cada08fc8a70 399 */
mbedAustin 11:cada08fc8a70 400 "1: \n\t"
mbedAustin 11:cada08fc8a70 401 "pshufd $0xff, %%xmm2, %%xmm2 \n\t"
mbedAustin 11:cada08fc8a70 402 "pxor %%xmm0, %%xmm2 \n\t"
mbedAustin 11:cada08fc8a70 403 "pslldq $4, %%xmm0 \n\t"
mbedAustin 11:cada08fc8a70 404 "pxor %%xmm0, %%xmm2 \n\t"
mbedAustin 11:cada08fc8a70 405 "pslldq $4, %%xmm0 \n\t"
mbedAustin 11:cada08fc8a70 406 "pxor %%xmm0, %%xmm2 \n\t"
mbedAustin 11:cada08fc8a70 407 "pslldq $4, %%xmm0 \n\t"
mbedAustin 11:cada08fc8a70 408 "pxor %%xmm2, %%xmm0 \n\t"
mbedAustin 11:cada08fc8a70 409 "add $16, %0 \n\t"
mbedAustin 11:cada08fc8a70 410 "movdqu %%xmm0, (%0) \n\t"
mbedAustin 11:cada08fc8a70 411
mbedAustin 11:cada08fc8a70 412 /* Set xmm2 to stuff:Y:stuff:stuff with Y = subword( r11 )
mbedAustin 11:cada08fc8a70 413 * and proceed to generate next round key from there */
mbedAustin 11:cada08fc8a70 414 AESKEYGENA xmm0_xmm2 ",0x00 \n\t"
mbedAustin 11:cada08fc8a70 415 "pshufd $0xaa, %%xmm2, %%xmm2 \n\t"
mbedAustin 11:cada08fc8a70 416 "pxor %%xmm1, %%xmm2 \n\t"
mbedAustin 11:cada08fc8a70 417 "pslldq $4, %%xmm1 \n\t"
mbedAustin 11:cada08fc8a70 418 "pxor %%xmm1, %%xmm2 \n\t"
mbedAustin 11:cada08fc8a70 419 "pslldq $4, %%xmm1 \n\t"
mbedAustin 11:cada08fc8a70 420 "pxor %%xmm1, %%xmm2 \n\t"
mbedAustin 11:cada08fc8a70 421 "pslldq $4, %%xmm1 \n\t"
mbedAustin 11:cada08fc8a70 422 "pxor %%xmm2, %%xmm1 \n\t"
mbedAustin 11:cada08fc8a70 423 "add $16, %0 \n\t"
mbedAustin 11:cada08fc8a70 424 "movdqu %%xmm1, (%0) \n\t"
mbedAustin 11:cada08fc8a70 425 "ret \n\t"
mbedAustin 11:cada08fc8a70 426
mbedAustin 11:cada08fc8a70 427 /*
mbedAustin 11:cada08fc8a70 428 * Main "loop" - Generating one more key than necessary,
mbedAustin 11:cada08fc8a70 429 * see definition of mbedtls_aes_context.buf
mbedAustin 11:cada08fc8a70 430 */
mbedAustin 11:cada08fc8a70 431 "2: \n\t"
mbedAustin 11:cada08fc8a70 432 AESKEYGENA xmm1_xmm2 ",0x01 \n\tcall 1b \n\t"
mbedAustin 11:cada08fc8a70 433 AESKEYGENA xmm1_xmm2 ",0x02 \n\tcall 1b \n\t"
mbedAustin 11:cada08fc8a70 434 AESKEYGENA xmm1_xmm2 ",0x04 \n\tcall 1b \n\t"
mbedAustin 11:cada08fc8a70 435 AESKEYGENA xmm1_xmm2 ",0x08 \n\tcall 1b \n\t"
mbedAustin 11:cada08fc8a70 436 AESKEYGENA xmm1_xmm2 ",0x10 \n\tcall 1b \n\t"
mbedAustin 11:cada08fc8a70 437 AESKEYGENA xmm1_xmm2 ",0x20 \n\tcall 1b \n\t"
mbedAustin 11:cada08fc8a70 438 AESKEYGENA xmm1_xmm2 ",0x40 \n\tcall 1b \n\t"
mbedAustin 11:cada08fc8a70 439 :
mbedAustin 11:cada08fc8a70 440 : "r" (rk), "r" (key)
mbedAustin 11:cada08fc8a70 441 : "memory", "cc", "0" );
mbedAustin 11:cada08fc8a70 442 }
mbedAustin 11:cada08fc8a70 443
mbedAustin 11:cada08fc8a70 444 /*
mbedAustin 11:cada08fc8a70 445 * Key expansion, wrapper
mbedAustin 11:cada08fc8a70 446 */
mbedAustin 11:cada08fc8a70 447 int mbedtls_aesni_setkey_enc( unsigned char *rk,
mbedAustin 11:cada08fc8a70 448 const unsigned char *key,
mbedAustin 11:cada08fc8a70 449 size_t bits )
mbedAustin 11:cada08fc8a70 450 {
mbedAustin 11:cada08fc8a70 451 switch( bits )
mbedAustin 11:cada08fc8a70 452 {
mbedAustin 11:cada08fc8a70 453 case 128: aesni_setkey_enc_128( rk, key ); break;
mbedAustin 11:cada08fc8a70 454 case 192: aesni_setkey_enc_192( rk, key ); break;
mbedAustin 11:cada08fc8a70 455 case 256: aesni_setkey_enc_256( rk, key ); break;
mbedAustin 11:cada08fc8a70 456 default : return( MBEDTLS_ERR_AES_INVALID_KEY_LENGTH );
mbedAustin 11:cada08fc8a70 457 }
mbedAustin 11:cada08fc8a70 458
mbedAustin 11:cada08fc8a70 459 return( 0 );
mbedAustin 11:cada08fc8a70 460 }
mbedAustin 11:cada08fc8a70 461
mbedAustin 11:cada08fc8a70 462 #endif /* MBEDTLS_HAVE_X86_64 */
mbedAustin 11:cada08fc8a70 463
mbedAustin 11:cada08fc8a70 464 #endif /* MBEDTLS_AESNI_C */