1 /* Microsoft Reference Implementation for TPM 2.0 2 * 3 * The copyright in this software is being made available under the BSD License, 4 * included below. This software may be subject to other third party and 5 * contributor rights, including patent rights, and no such rights are granted 6 * under this license. 7 * 8 * Copyright (c) Microsoft Corporation 9 * 10 * All rights reserved. 11 * 12 * BSD License 13 * 14 * Redistribution and use in source and binary forms, with or without modification, 15 * are permitted provided that the following conditions are met: 16 * 17 * Redistributions of source code must retain the above copyright notice, this list 18 * of conditions and the following disclaimer. 19 * 20 * Redistributions in binary form must reproduce the above copyright notice, this 21 * list of conditions and the following disclaimer in the documentation and/or 22 * other materials provided with the distribution. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ""AS IS"" 25 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 27 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR 28 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 29 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 30 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON 31 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 32 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 34 */ 35 #ifndef _SWAP_H 36 #define _SWAP_H 37 38 #if LITTLE_ENDIAN_TPM 39 #define TO_BIG_ENDIAN_UINT16(i) REVERSE_ENDIAN_16(i) 40 #define FROM_BIG_ENDIAN_UINT16(i) REVERSE_ENDIAN_16(i) 41 #define TO_BIG_ENDIAN_UINT32(i) REVERSE_ENDIAN_32(i) 42 #define FROM_BIG_ENDIAN_UINT32(i) REVERSE_ENDIAN_32(i) 43 #define TO_BIG_ENDIAN_UINT64(i) REVERSE_ENDIAN_64(i) 44 #define FROM_BIG_ENDIAN_UINT64(i) REVERSE_ENDIAN_64(i) 45 #else 46 #define TO_BIG_ENDIAN_UINT16(i) (i) 47 #define FROM_BIG_ENDIAN_UINT16(i) (i) 48 #define TO_BIG_ENDIAN_UINT32(i) (i) 49 #define FROM_BIG_ENDIAN_UINT32(i) (i) 50 #define TO_BIG_ENDIAN_UINT64(i) (i) 51 #define FROM_BIG_ENDIAN_UINT64(i) (i) 52 #endif 53 54 #if AUTO_ALIGN == NO 55 56 // The aggregation macros for machines that do not allow unaligned access or for 57 // little-endian machines. 58 59 // Aggregate bytes into an UINT 60 61 #define BYTE_ARRAY_TO_UINT8(b) (uint8_t)((b)[0]) 62 #define BYTE_ARRAY_TO_UINT16(b) ByteArrayToUint16((BYTE *)(b)) 63 #define BYTE_ARRAY_TO_UINT32(b) ByteArrayToUint32((BYTE *)(b)) 64 #define BYTE_ARRAY_TO_UINT64(b) ByteArrayToUint64((BYTE *)(b)) 65 #define UINT8_TO_BYTE_ARRAY(i, b) ((b)[0] = (uint8_t)(i)) 66 #define UINT16_TO_BYTE_ARRAY(i, b) Uint16ToByteArray((i), (BYTE *)(b)) 67 #define UINT32_TO_BYTE_ARRAY(i, b) Uint32ToByteArray((i), (BYTE *)(b)) 68 #define UINT64_TO_BYTE_ARRAY(i, b) Uint64ToByteArray((i), (BYTE *)(b)) 69 70 71 #else // AUTO_ALIGN 72 73 #if BIG_ENDIAN_TPM 74 // the big-endian macros for machines that allow unaligned memory access 75 // Aggregate a byte array into a UINT 76 #define BYTE_ARRAY_TO_UINT8(b) *((uint8_t *)(b)) 77 #define BYTE_ARRAY_TO_UINT16(b) *((uint16_t *)(b)) 78 #define BYTE_ARRAY_TO_UINT32(b) *((uint32_t *)(b)) 79 #define BYTE_ARRAY_TO_UINT64(b) *((uint64_t *)(b)) 80 81 // Disaggregate a UINT into a byte array 82 83 #define UINT8_TO_BYTE_ARRAY(i, b) {*((uint8_t *)(b)) = (i);} 84 #define UINT16_TO_BYTE_ARRAY(i, b) {*((uint16_t *)(b)) = (i);} 85 #define UINT32_TO_BYTE_ARRAY(i, b) {*((uint32_t *)(b)) = (i);} 86 #define UINT64_TO_BYTE_ARRAY(i, b) {*((uint64_t *)(b)) = (i);} 87 #else 88 // the little endian macros for machines that allow unaligned memory access 89 // the big-endian macros for machines that allow unaligned memory access 90 // Aggregate a byte array into a UINT 91 #define BYTE_ARRAY_TO_UINT8(b) *((uint8_t *)(b)) 92 #define BYTE_ARRAY_TO_UINT16(b) REVERSE_ENDIAN_16(*((uint16_t *)(b))) 93 #define BYTE_ARRAY_TO_UINT32(b) REVERSE_ENDIAN_32(*((uint32_t *)(b))) 94 #define BYTE_ARRAY_TO_UINT64(b) REVERSE_ENDIAN_64(*((uint64_t *)(b))) 95 96 // Disaggregate a UINT into a byte array 97 98 #define UINT8_TO_BYTE_ARRAY(i, b) {*((uint8_t *)(b)) = (i);} 99 #define UINT16_TO_BYTE_ARRAY(i, b) {*((uint16_t *)(b)) = REVERSE_ENDIAN_16(i);} 100 #define UINT32_TO_BYTE_ARRAY(i, b) {*((uint32_t *)(b)) = REVERSE_ENDIAN_32(i);} 101 #define UINT64_TO_BYTE_ARRAY(i, b) {*((uint64_t *)(b)) = REVERSE_ENDIAN_64(i);} 102 #endif // BIG_ENDIAN_TPM 103 104 #endif // AUTO_ALIGN == NO 105 106 #endif // _SWAP_H 107