7 *%lze8^dJbѿ y_I|+ %/* * Copyright 2025 The OpenSSL Project Authors. All Rights Reserved. * * Licensed under the Apache License 2.0 (the "License"). You may not use * this file except in compliance with the License. You can obtain a copy * in the file LICENSE in the source distribution or at * https://www.openssl.org/source/license.html */ #ifndef OPENSSL_BYTEORDER_H #define OPENSSL_BYTEORDER_H #pragma once #include #include /* * "Modern" compilers do a decent job of optimising these functions to just a * couple of instruction ([swap +] store, or load [+ swap]) when either no * swapping is required, or a suitable swap instruction is available. */ #if defined(_MSC_VER) && _MSC_VER >= 1300 #include #pragma intrinsic(_byteswap_ushort) #pragma intrinsic(_byteswap_ulong) #pragma intrinsic(_byteswap_uint64) #define OSSL_HTOBE16(x) _byteswap_ushort(x) #define OSSL_HTOBE32(x) _byteswap_ulong(x) #define OSSL_HTOBE64(x) _byteswap_uint64(x) #define OSSL_BE16TOH(x) _byteswap_ushort(x) #define OSSL_BE32TOH(x) _byteswap_ulong(x) #define OSSL_BE64TOH(x) _byteswap_uint64(x) #define OSSL_HTOLE16(x) (x) #define OSSL_HTOLE32(x) (x) #define OSSL_HTOLE64(x) (x) #define OSSL_LE16TOH(x) (x) #define OSSL_LE32TOH(x) (x) #define OSSL_LE64TOH(x) (x) #elif defined(__GLIBC__) && defined(__GLIBC_PREREQ) #if (__GLIBC_PREREQ(2, 19)) && defined(_DEFAULT_SOURCE) #include #define OSSL_HTOBE16(x) htobe16(x) #define OSSL_HTOBE32(x) htobe32(x) #define OSSL_HTOBE64(x) htobe64(x) #define OSSL_BE16TOH(x) be16toh(x) #define OSSL_BE32TOH(x) be32toh(x) #define OSSL_BE64TOH(x) be64toh(x) #define OSSL_HTOLE16(x) htole16(x) #define OSSL_HTOLE32(x) htole32(x) #define OSSL_HTOLE64(x) htole64(x) #define OSSL_LE16TOH(x) le16toh(x) #define OSSL_LE32TOH(x) le32toh(x) #define OSSL_LE64TOH(x) le64toh(x) #endif #elif defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) #if defined(__OpenBSD__) #include #else #include #endif #define OSSL_HTOBE16(x) htobe16(x) #define OSSL_HTOBE32(x) htobe32(x) #define OSSL_HTOBE64(x) htobe64(x) #define OSSL_BE16TOH(x) be16toh(x) #define OSSL_BE32TOH(x) be32toh(x) #define OSSL_BE64TOH(x) be64toh(x) #define OSSL_HTOLE16(x) htole16(x) #define OSSL_HTOLE32(x) htole32(x) #define OSSL_HTOLE64(x) htole64(x) #define OSSL_LE16TOH(x) le16toh(x) #define OSSL_LE32TOH(x) le32toh(x) #define OSSL_LE64TOH(x) le64toh(x) #elif defined(__APPLE__) #include #define OSSL_HTOBE16(x) OSSwapHostToBigInt16(x) #define OSSL_HTOBE32(x) OSSwapHostToBigInt32(x) #define OSSL_HTOBE64(x) OSSwapHostToBigInt64(x) #define OSSL_BE16TOH(x) OSSwapBigToHostInt16(x) #define OSSL_BE32TOH(x) OSSwapBigToHostInt32(x) #define OSSL_BE64TOH(x) OSSwapBigToHostInt64(x) #define OSSL_HTOLE16(x) OSSwapHostToLittleInt16(x) #define OSSL_HTOLE32(x) OSSwapHostToLittleInt32(x) #define OSSL_HTOLE64(x) OSSwapHostToLittleInt64(x) #define OSSL_LE16TOH(x) OSSwapLittleToHostInt16(x) #define OSSL_LE32TOH(x) OSSwapLittleToHostInt32(x) #define OSSL_LE64TOH(x) OSSwapLittleToHostInt64(x) #endif static ossl_inline ossl_unused unsigned char * OPENSSL_store_u16_le(unsigned char *out, uint16_t val) { #ifdef OSSL_HTOLE16 uint16_t t = OSSL_HTOLE16(val); memcpy(out, (unsigned char *)&t, 2); return out + 2; #else *out++ = (val & 0xff); *out++ = (val >> 8) & 0xff; return out; #endif } static ossl_inline ossl_unused unsigned char * OPENSSL_store_u16_be(unsigned char *out, uint16_t val) { #ifdef OSSL_HTOBE16 uint16_t t = OSSL_HTOBE16(val); memcpy(out, (unsigned char *)&t, 2); return out + 2; #else *out++ = (val >> 8) & 0xff; *out++ = (val & 0xff); return out; #endif } static ossl_inline ossl_unused unsigned char * OPENSSL_store_u32_le(unsigned char *out, uint32_t val) { #ifdef OSSL_HTOLE32 uint32_t t = OSSL_HTOLE32(val); memcpy(out, (unsigned char *)&t, 4); return out + 4; #else *out++ = (val & 0xff); *out++ = (val >> 8) & 0xff; *out++ = (val >> 16) & 0xff; *out++