| /* |
| * Copyright (c) 2018, The OpenThread Authors. |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * 3. Neither the name of the copyright holder nor the |
| * names of its contributors may be used to endorse or promote products |
| * derived from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE |
| * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| * POSSIBILITY OF SUCH DAMAGE. |
| */ |
| /* |
| * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved |
| * SPDX-License-Identifier: Apache-2.0 |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); you may |
| * not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT |
| * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #include "mbedtls/aes.h" |
| |
| #include "aes_alt_soft.h" |
| |
| #include <string.h> |
| |
| #ifdef MBEDTLS_AES_ALT |
| |
| #if NRF_MBEDTLS_AES_ALT_INTERRUPT_CONTEXT |
| |
| /* |
| * 32-bit integer manipulation macros (little endian) |
| */ |
| #define GET_UINT32_LE(n,b,i) \ |
| { \ |
| (n) = ( (uint32_t) (b)[(i) ] ) \ |
| | ( (uint32_t) (b)[(i) + 1] << 8 ) \ |
| | ( (uint32_t) (b)[(i) + 2] << 16 ) \ |
| | ( (uint32_t) (b)[(i) + 3] << 24 ); \ |
| } |
| |
| #define PUT_UINT32_LE(n,b,i) \ |
| { \ |
| (b)[(i) ] = (unsigned char) ( ( (n) ) & 0xFF ); \ |
| (b)[(i) + 1] = (unsigned char) ( ( (n) >> 8 ) & 0xFF ); \ |
| (b)[(i) + 2] = (unsigned char) ( ( (n) >> 16 ) & 0xFF ); \ |
| (b)[(i) + 3] = (unsigned char) ( ( (n) >> 24 ) & 0xFF ); \ |
| } |
| |
| /* |
| * Forward S-box |
| */ |
| static const unsigned char FSb[256] = |
| { |
| 0x63, 0x7C, 0x77, 0x7B, 0xF2, 0x6B, 0x6F, 0xC5, |
| 0x30, 0x01, 0x67, 0x2B, 0xFE, 0xD7, 0xAB, 0x76, |
| 0xCA, 0x82, 0xC9, 0x7D, 0xFA, 0x59, 0x47, 0xF0, |
| 0xAD, 0xD4, 0xA2, 0xAF, 0x9C, 0xA4, 0x72, 0xC0, |
| 0xB7, 0xFD, 0x93, 0x26, 0x36, 0x3F, 0xF7, 0xCC, |
| 0x34, 0xA5, 0xE5, 0xF1, 0x71, 0xD8, 0x31, 0x15, |
| 0x04, 0xC7, 0x23, 0xC3, 0x18, 0x96, 0x05, 0x9A, |
| 0x07, 0x12, 0x80, 0xE2, 0xEB, 0x27, 0xB2, 0x75, |
| 0x09, 0x83, 0x2C, 0x1A, 0x1B, 0x6E, 0x5A, 0xA0, |
| 0x52, 0x3B, 0xD6, 0xB3, 0x29, 0xE3, 0x2F, 0x84, |
| 0x53, 0xD1, 0x00, 0xED, 0x20, 0xFC, 0xB1, 0x5B, |
| 0x6A, 0xCB, 0xBE, 0x39, 0x4A, 0x4C, 0x58, 0xCF, |
| 0xD0, 0xEF, 0xAA, 0xFB, 0x43, 0x4D, 0x33, 0x85, |
| 0x45, 0xF9, 0x02, 0x7F, 0x50, 0x3C, 0x9F, 0xA8, |
| 0x51, 0xA3, 0x40, 0x8F, 0x92, 0x9D, 0x38, 0xF5, |
| 0xBC, 0xB6, 0xDA, 0x21, 0x10, 0xFF, 0xF3, 0xD2, |
| 0xCD, 0x0C, 0x13, 0xEC, 0x5F, 0x97, 0x44, 0x17, |
| 0xC4, 0xA7, 0x7E, 0x3D, 0x64, 0x5D, 0x19, 0x73, |
| 0x60, 0x81, 0x4F, 0xDC, 0x22, 0x2A, 0x90, 0x88, |
| 0x46, 0xEE, 0xB8, 0x14, 0xDE, 0x5E, 0x0B, 0xDB, |
| 0xE0, 0x32, 0x3A, 0x0A, 0x49, 0x06, 0x24, 0x5C, |
| 0xC2, 0xD3, 0xAC, 0x62, 0x91, 0x95, 0xE4, 0x79, |
| 0xE7, 0xC8, 0x37, 0x6D, 0x8D, 0xD5, 0x4E, 0xA9, |
| 0x6C, 0x56, 0xF4, 0xEA, 0x65, 0x7A, 0xAE, 0x08, |
| 0xBA, 0x78, 0x25, 0x2E, 0x1C, 0xA6, 0xB4, 0xC6, |
| 0xE8, 0xDD, 0x74, 0x1F, 0x4B, 0xBD, 0x8B, 0x8A, |
| 0x70, 0x3E, 0xB5, 0x66, 0x48, 0x03, 0xF6, 0x0E, |
| 0x61, 0x35, 0x57, 0xB9, 0x86, 0xC1, 0x1D, 0x9E, |
| 0xE1, 0xF8, 0x98, 0x11, 0x69, 0xD9, 0x8E, 0x94, |
| 0x9B, 0x1E, 0x87, 0xE9, 0xCE, 0x55, 0x28, 0xDF, |
| 0x8C, 0xA1, 0x89, 0x0D, 0xBF, 0xE6, 0x42, 0x68, |
| 0x41, 0x99, 0x2D, 0x0F, 0xB0, 0x54, 0xBB, 0x16 |
| }; |
| |
| /* |
| * Forward tables |
| */ |
| #define FT \ |
| \ |
| V(A5,63,63,C6), V(84,7C,7C,F8), V(99,77,77,EE), V(8D,7B,7B,F6), \ |
| V(0D,F2,F2,FF), V(BD,6B,6B,D6), V(B1,6F,6F,DE), V(54,C5,C5,91), \ |
| V(50,30,30,60), V(03,01,01,02), V(A9,67,67,CE), V(7D,2B,2B,56), \ |
| V(19,FE,FE,E7), V(62,D7,D7,B5), V(E6,AB,AB,4D), V(9A,76,76,EC), \ |
| V(45,CA,CA,8F), V(9D,82,82,1F), V(40,C9,C9,89), V(87,7D,7D,FA), \ |
| V(15,FA,FA,EF), V(EB,59,59,B2), V(C9,47,47,8E), V(0B,F0,F0,FB), \ |
| V(EC,AD,AD,41), V(67,D4,D4,B3), V(FD,A2,A2,5F), V(EA,AF,AF,45), \ |
| V(BF,9C,9C,23), V(F7,A4,A4,53), V(96,72,72,E4), V(5B,C0,C0,9B), \ |
| V(C2,B7,B7,75), V(1C,FD,FD,E1), V(AE,93,93,3D), V(6A,26,26,4C), \ |
| V(5A,36,36,6C), V(41,3F,3F,7E), V(02,F7,F7,F5), V(4F,CC,CC,83), \ |
| V(5C,34,34,68), V(F4,A5,A5,51), V(34,E5,E5,D1), V(08,F1,F1,F9), \ |
| V(93,71,71,E2), V(73,D8,D8,AB), V(53,31,31,62), V(3F,15,15,2A), \ |
| V(0C,04,04,08), V(52,C7,C7,95), V(65,23,23,46), V(5E,C3,C3,9D), \ |
| V(28,18,18,30), V(A1,96,96,37), V(0F,05,05,0A), V(B5,9A,9A,2F), \ |
| V(09,07,07,0E), V(36,12,12,24), V(9B,80,80,1B), V(3D,E2,E2,DF), \ |
| V(26,EB,EB,CD), V(69,27,27,4E), V(CD,B2,B2,7F), V(9F,75,75,EA), \ |
| V(1B,09,09,12), V(9E,83,83,1D), V(74,2C,2C,58), V(2E,1A,1A,34), \ |
| V(2D,1B,1B,36), V(B2,6E,6E,DC), V(EE,5A,5A,B4), V(FB,A0,A0,5B), \ |
| V(F6,52,52,A4), V(4D,3B,3B,76), V(61,D6,D6,B7), V(CE,B3,B3,7D), \ |
| V(7B,29,29,52), V(3E,E3,E3,DD), V(71,2F,2F,5E), V(97,84,84,13), \ |
| V(F5,53,53,A6), V(68,D1,D1,B9), V(00,00,00,00), V(2C,ED,ED,C1), \ |
| V(60,20,20,40), V(1F,FC,FC,E3), V(C8,B1,B1,79), V(ED,5B,5B,B6), \ |
| V(BE,6A,6A,D4), V(46,CB,CB,8D), V(D9,BE,BE,67), V(4B,39,39,72), \ |
| V(DE,4A,4A,94), V(D4,4C,4C,98), V(E8,58,58,B0), V(4A,CF,CF,85), \ |
| V(6B,D0,D0,BB), V(2A,EF,EF,C5), V(E5,AA,AA,4F), V(16,FB,FB,ED), \ |
| V(C5,43,43,86), V(D7,4D,4D,9A), V(55,33,33,66), V(94,85,85,11), \ |
| V(CF,45,45,8A), V(10,F9,F9,E9), V(06,02,02,04), V(81,7F,7F,FE), \ |
| V(F0,50,50,A0), V(44,3C,3C,78), V(BA,9F,9F,25), V(E3,A8,A8,4B), \ |
| V(F3,51,51,A2), V(FE,A3,A3,5D), V(C0,40,40,80), V(8A,8F,8F,05), \ |
| V(AD,92,92,3F), V(BC,9D,9D,21), V(48,38,38,70), V(04,F5,F5,F1), \ |
| V(DF,BC,BC,63), V(C1,B6,B6,77), V(75,DA,DA,AF), V(63,21,21,42), \ |
| V(30,10,10,20), V(1A,FF,FF,E5), V(0E,F3,F3,FD), V(6D,D2,D2,BF), \ |
| V(4C,CD,CD,81), V(14,0C,0C,18), V(35,13,13,26), V(2F,EC,EC,C3), \ |
| V(E1,5F,5F,BE), V(A2,97,97,35), V(CC,44,44,88), V(39,17,17,2E), \ |
| V(57,C4,C4,93), V(F2,A7,A7,55), V(82,7E,7E,FC), V(47,3D,3D,7A), \ |
| V(AC,64,64,C8), V(E7,5D,5D,BA), V(2B,19,19,32), V(95,73,73,E6), \ |
| V(A0,60,60,C0), V(98,81,81,19), V(D1,4F,4F,9E), V(7F,DC,DC,A3), \ |
| V(66,22,22,44), V(7E,2A,2A,54), V(AB,90,90,3B), V(83,88,88,0B), \ |
| V(CA,46,46,8C), V(29,EE,EE,C7), V(D3,B8,B8,6B), V(3C,14,14,28), \ |
| V(79,DE,DE,A7), V(E2,5E,5E,BC), V(1D,0B,0B,16), V(76,DB,DB,AD), \ |
| V(3B,E0,E0,DB), V(56,32,32,64), V(4E,3A,3A,74), V(1E,0A,0A,14), \ |
| V(DB,49,49,92), V(0A,06,06,0C), V(6C,24,24,48), V(E4,5C,5C,B8), \ |
| V(5D,C2,C2,9F), V(6E,D3,D3,BD), V(EF,AC,AC,43), V(A6,62,62,C4), \ |
| V(A8,91,91,39), V(A4,95,95,31), V(37,E4,E4,D3), V(8B,79,79,F2), \ |
| V(32,E7,E7,D5), V(43,C8,C8,8B), V(59,37,37,6E), V(B7,6D,6D,DA), \ |
| V(8C,8D,8D,01), V(64,D5,D5,B1), V(D2,4E,4E,9C), V(E0,A9,A9,49), \ |
| V(B4,6C,6C,D8), V(FA,56,56,AC), V(07,F4,F4,F3), V(25,EA,EA,CF), \ |
| V(AF,65,65,CA), V(8E,7A,7A,F4), V(E9,AE,AE,47), V(18,08,08,10), \ |
| V(D5,BA,BA,6F), V(88,78,78,F0), V(6F,25,25,4A), V(72,2E,2E,5C), \ |
| V(24,1C,1C,38), V(F1,A6,A6,57), V(C7,B4,B4,73), V(51,C6,C6,97), \ |
| V(23,E8,E8,CB), V(7C,DD,DD,A1), V(9C,74,74,E8), V(21,1F,1F,3E), \ |
| V(DD,4B,4B,96), V(DC,BD,BD,61), V(86,8B,8B,0D), V(85,8A,8A,0F), \ |
| V(90,70,70,E0), V(42,3E,3E,7C), V(C4,B5,B5,71), V(AA,66,66,CC), \ |
| V(D8,48,48,90), V(05,03,03,06), V(01,F6,F6,F7), V(12,0E,0E,1C), \ |
| V(A3,61,61,C2), V(5F,35,35,6A), V(F9,57,57,AE), V(D0,B9,B9,69), \ |
| V(91,86,86,17), V(58,C1,C1,99), V(27,1D,1D,3A), V(B9,9E,9E,27), \ |
| V(38,E1,E1,D9), V(13,F8,F8,EB), V(B3,98,98,2B), V(33,11,11,22), \ |
| V(BB,69,69,D2), V(70,D9,D9,A9), V(89,8E,8E,07), V(A7,94,94,33), \ |
| V(B6,9B,9B,2D), V(22,1E,1E,3C), V(92,87,87,15), V(20,E9,E9,C9), \ |
| V(49,CE,CE,87), V(FF,55,55,AA), V(78,28,28,50), V(7A,DF,DF,A5), \ |
| V(8F,8C,8C,03), V(F8,A1,A1,59), V(80,89,89,09), V(17,0D,0D,1A), \ |
| V(DA,BF,BF,65), V(31,E6,E6,D7), V(C6,42,42,84), V(B8,68,68,D0), \ |
| V(C3,41,41,82), V(B0,99,99,29), V(77,2D,2D,5A), V(11,0F,0F,1E), \ |
| V(CB,B0,B0,7B), V(FC,54,54,A8), V(D6,BB,BB,6D), V(3A,16,16,2C) |
| |
| #define V(a,b,c,d) 0x##a##b##c##d |
| static const uint32_t FT0[256] = { FT }; |
| #undef V |
| |
| #define V(a,b,c,d) 0x##b##c##d##a |
| static const uint32_t FT1[256] = { FT }; |
| #undef V |
| |
| #define V(a,b,c,d) 0x##c##d##a##b |
| static const uint32_t FT2[256] = { FT }; |
| #undef V |
| |
| #define V(a,b,c,d) 0x##d##a##b##c |
| static const uint32_t FT3[256] = { FT }; |
| #undef V |
| |
| #undef FT |
| |
| /* |
| * Round constants |
| */ |
| static const uint32_t RCON[10] = |
| { |
| 0x00000001, 0x00000002, 0x00000004, 0x00000008, |
| 0x00000010, 0x00000020, 0x00000040, 0x00000080, |
| 0x0000001B, 0x00000036 |
| }; |
| |
| #define AES_FROUND(X0,X1,X2,X3,Y0,Y1,Y2,Y3) \ |
| { \ |
| X0 = *RK++ ^ FT0[ ( Y0 ) & 0xFF ] ^ \ |
| FT1[ ( Y1 >> 8 ) & 0xFF ] ^ \ |
| FT2[ ( Y2 >> 16 ) & 0xFF ] ^ \ |
| FT3[ ( Y3 >> 24 ) & 0xFF ]; \ |
| \ |
| X1 = *RK++ ^ FT0[ ( Y1 ) & 0xFF ] ^ \ |
| FT1[ ( Y2 >> 8 ) & 0xFF ] ^ \ |
| FT2[ ( Y3 >> 16 ) & 0xFF ] ^ \ |
| FT3[ ( Y0 >> 24 ) & 0xFF ]; \ |
| \ |
| X2 = *RK++ ^ FT0[ ( Y2 ) & 0xFF ] ^ \ |
| FT1[ ( Y3 >> 8 ) & 0xFF ] ^ \ |
| FT2[ ( Y0 >> 16 ) & 0xFF ] ^ \ |
| FT3[ ( Y1 >> 24 ) & 0xFF ]; \ |
| \ |
| X3 = *RK++ ^ FT0[ ( Y3 ) & 0xFF ] ^ \ |
| FT1[ ( Y0 >> 8 ) & 0xFF ] ^ \ |
| FT2[ ( Y1 >> 16 ) & 0xFF ] ^ \ |
| FT3[ ( Y2 >> 24 ) & 0xFF ]; \ |
| } |
| |
| void aes_soft_init( mbedtls_aes_context *ctx ) |
| { |
| memset( ctx, 0, sizeof( mbedtls_aes_context ) ); |
| } |
| |
| void aes_soft_free( mbedtls_aes_context *ctx ) |
| { |
| memset( ctx, 0, sizeof( mbedtls_aes_context ) ); |
| } |
| |
| /* |
| * AES key schedule (encryption) |
| */ |
| int aes_soft_setkey_enc( mbedtls_aes_context *ctx, const unsigned char *key, |
| unsigned int keybits ) |
| { |
| unsigned int i; |
| uint32_t *RK; |
| |
| switch( keybits ) |
| { |
| case 128: ctx->software.nr = 10; break; |
| case 192: ctx->software.nr = 12; break; |
| case 256: ctx->software.nr = 14; break; |
| default : return( MBEDTLS_ERR_AES_INVALID_KEY_LENGTH ); |
| } |
| |
| ctx->software.rk = RK = ctx->software.buf; |
| |
| for( i = 0; i < ( keybits >> 5 ); i++ ) |
| { |
| GET_UINT32_LE( RK[i], key, i << 2 ); |
| } |
| |
| switch( ctx->software.nr ) |
| { |
| case 10: |
| |
| for( i = 0; i < 10; i++, RK += 4 ) |
| { |
| RK[4] = RK[0] ^ RCON[i] ^ |
| ( (uint32_t) FSb[ ( RK[3] >> 8 ) & 0xFF ] ) ^ |
| ( (uint32_t) FSb[ ( RK[3] >> 16 ) & 0xFF ] << 8 ) ^ |
| ( (uint32_t) FSb[ ( RK[3] >> 24 ) & 0xFF ] << 16 ) ^ |
| ( (uint32_t) FSb[ ( RK[3] ) & 0xFF ] << 24 ); |
| |
| RK[5] = RK[1] ^ RK[4]; |
| RK[6] = RK[2] ^ RK[5]; |
| RK[7] = RK[3] ^ RK[6]; |
| } |
| break; |
| |
| case 12: |
| |
| for( i = 0; i < 8; i++, RK += 6 ) |
| { |
| RK[6] = RK[0] ^ RCON[i] ^ |
| ( (uint32_t) FSb[ ( RK[5] >> 8 ) & 0xFF ] ) ^ |
| ( (uint32_t) FSb[ ( RK[5] >> 16 ) & 0xFF ] << 8 ) ^ |
| ( (uint32_t) FSb[ ( RK[5] >> 24 ) & 0xFF ] << 16 ) ^ |
| ( (uint32_t) FSb[ ( RK[5] ) & 0xFF ] << 24 ); |
| |
| RK[7] = RK[1] ^ RK[6]; |
| RK[8] = RK[2] ^ RK[7]; |
| RK[9] = RK[3] ^ RK[8]; |
| RK[10] = RK[4] ^ RK[9]; |
| RK[11] = RK[5] ^ RK[10]; |
| } |
| break; |
| |
| case 14: |
| |
| for( i = 0; i < 7; i++, RK += 8 ) |
| { |
| RK[8] = RK[0] ^ RCON[i] ^ |
| ( (uint32_t) FSb[ ( RK[7] >> 8 ) & 0xFF ] ) ^ |
| ( (uint32_t) FSb[ ( RK[7] >> 16 ) & 0xFF ] << 8 ) ^ |
| ( (uint32_t) FSb[ ( RK[7] >> 24 ) & 0xFF ] << 16 ) ^ |
| ( (uint32_t) FSb[ ( RK[7] ) & 0xFF ] << 24 ); |
| |
| RK[9] = RK[1] ^ RK[8]; |
| RK[10] = RK[2] ^ RK[9]; |
| RK[11] = RK[3] ^ RK[10]; |
| |
| RK[12] = RK[4] ^ |
| ( (uint32_t) FSb[ ( RK[11] ) & 0xFF ] ) ^ |
| ( (uint32_t) FSb[ ( RK[11] >> 8 ) & 0xFF ] << 8 ) ^ |
| ( (uint32_t) FSb[ ( RK[11] >> 16 ) & 0xFF ] << 16 ) ^ |
| ( (uint32_t) FSb[ ( RK[11] >> 24 ) & 0xFF ] << 24 ); |
| |
| RK[13] = RK[5] ^ RK[12]; |
| RK[14] = RK[6] ^ RK[13]; |
| RK[15] = RK[7] ^ RK[14]; |
| } |
| break; |
| } |
| |
| return( 0 ); |
| } |
| |
| /* |
| * AES-ECB block encryption |
| */ |
| int aes_encrypt( mbedtls_aes_context *ctx, |
| const unsigned char input[16], |
| unsigned char output[16] ) |
| { |
| int i; |
| uint32_t *RK, X0, X1, X2, X3, Y0, Y1, Y2, Y3; |
| |
| RK = ctx->software.rk; |
| |
| GET_UINT32_LE( X0, input, 0 ); X0 ^= *RK++; |
| GET_UINT32_LE( X1, input, 4 ); X1 ^= *RK++; |
| GET_UINT32_LE( X2, input, 8 ); X2 ^= *RK++; |
| GET_UINT32_LE( X3, input, 12 ); X3 ^= *RK++; |
| |
| for( i = ( ctx->software.nr >> 1 ) - 1; i > 0; i-- ) |
| { |
| AES_FROUND( Y0, Y1, Y2, Y3, X0, X1, X2, X3 ); |
| AES_FROUND( X0, X1, X2, X3, Y0, Y1, Y2, Y3 ); |
| } |
| |
| AES_FROUND( Y0, Y1, Y2, Y3, X0, X1, X2, X3 ); |
| |
| X0 = *RK++ ^ \ |
| ( (uint32_t) FSb[ ( Y0 ) & 0xFF ] ) ^ |
| ( (uint32_t) FSb[ ( Y1 >> 8 ) & 0xFF ] << 8 ) ^ |
| ( (uint32_t) FSb[ ( Y2 >> 16 ) & 0xFF ] << 16 ) ^ |
| ( (uint32_t) FSb[ ( Y3 >> 24 ) & 0xFF ] << 24 ); |
| |
| X1 = *RK++ ^ \ |
| ( (uint32_t) FSb[ ( Y1 ) & 0xFF ] ) ^ |
| ( (uint32_t) FSb[ ( Y2 >> 8 ) & 0xFF ] << 8 ) ^ |
| ( (uint32_t) FSb[ ( Y3 >> 16 ) & 0xFF ] << 16 ) ^ |
| ( (uint32_t) FSb[ ( Y0 >> 24 ) & 0xFF ] << 24 ); |
| |
| X2 = *RK++ ^ \ |
| ( (uint32_t) FSb[ ( Y2 ) & 0xFF ] ) ^ |
| ( (uint32_t) FSb[ ( Y3 >> 8 ) & 0xFF ] << 8 ) ^ |
| ( (uint32_t) FSb[ ( Y0 >> 16 ) & 0xFF ] << 16 ) ^ |
| ( (uint32_t) FSb[ ( Y1 >> 24 ) & 0xFF ] << 24 ); |
| |
| X3 = *RK++ ^ \ |
| ( (uint32_t) FSb[ ( Y3 ) & 0xFF ] ) ^ |
| ( (uint32_t) FSb[ ( Y0 >> 8 ) & 0xFF ] << 8 ) ^ |
| ( (uint32_t) FSb[ ( Y1 >> 16 ) & 0xFF ] << 16 ) ^ |
| ( (uint32_t) FSb[ ( Y2 >> 24 ) & 0xFF ] << 24 ); |
| |
| PUT_UINT32_LE( X0, output, 0 ); |
| PUT_UINT32_LE( X1, output, 4 ); |
| PUT_UINT32_LE( X2, output, 8 ); |
| PUT_UINT32_LE( X3, output, 12 ); |
| |
| return( 0 ); |
| } |
| |
| int aes_soft_crypt_ecb( mbedtls_aes_context *ctx, |
| int mode, |
| const unsigned char input[16], |
| unsigned char output[16] ) |
| { |
| // OpenThread uses MBEDTLS_AES_ENCRYPT mode only |
| (void)mode; |
| |
| return aes_encrypt( ctx, input, output ); |
| } |
| |
| #endif /* NRF_MBEDTLS_AES_ALT_INTERRUPT_CONTEXT */ |
| |
| #endif /* MBEDTLS_AES_ALT */ |
