1 /* misc.h 2 * 3 * Copyright (C) 2006-2021 wolfSSL Inc. 4 * 5 * This file is part of wolfSSL. 6 * 7 * wolfSSL is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License as published by 9 * the Free Software Foundation; either version 2 of the License, or 10 * (at your option) any later version. 11 * 12 * wolfSSL is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 * GNU General Public License for more details. 16 * 17 * You should have received a copy of the GNU General Public License 18 * along with this program; if not, write to the Free Software 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA 20 */ 21 /* 22 23 DESCRIPTION 24 This module implements the arithmetic-shift right, left, byte swapping, XOR, 25 masking and clearing memory logic. 26 27 */ 28 #ifndef WOLF_CRYPT_MISC_H 29 #define WOLF_CRYPT_MISC_H 30 31 32 #include <wolfssl/wolfcrypt/types.h> 33 34 35 #ifdef __cplusplus 36 extern "C" { 37 #endif 38 39 40 #ifdef NO_INLINE 41 WOLFSSL_LOCAL 42 word32 rotlFixed(word32, word32); 43 WOLFSSL_LOCAL 44 word32 rotrFixed(word32, word32); 45 46 #ifdef WC_RC2 47 WOLFSSL_LOCAL 48 word16 rotlFixed16(word16, word16); 49 WOLFSSL_LOCAL 50 word16 rotrFixed16(word16, word16); 51 #endif 52 53 WOLFSSL_LOCAL 54 word32 ByteReverseWord32(word32); 55 WOLFSSL_LOCAL 56 void ByteReverseWords(word32*, const word32*, word32); 57 58 WOLFSSL_LOCAL 59 void XorWordsOut(wolfssl_word* r, const wolfssl_word* a, const wolfssl_word* b, 60 word32 n); 61 WOLFSSL_LOCAL 62 void xorbufout(void*, const void*, const void*, word32); 63 WOLFSSL_LOCAL 64 void XorWords(wolfssl_word*, const wolfssl_word*, word32); 65 WOLFSSL_LOCAL 66 void xorbuf(void*, const void*, word32); 67 68 WOLFSSL_LOCAL 69 void ForceZero(void*, word32); 70 71 WOLFSSL_LOCAL 72 int ConstantCompare(const byte*, const byte*, int); 73 74 #ifdef WORD64_AVAILABLE 75 WOLFSSL_LOCAL 76 word64 rotlFixed64(word64, word64); 77 WOLFSSL_LOCAL 78 word64 rotrFixed64(word64, word64); 79 80 WOLFSSL_LOCAL 81 word64 ByteReverseWord64(word64); 82 WOLFSSL_LOCAL 83 void ByteReverseWords64(word64*, const word64*, word32); 84 #endif /* WORD64_AVAILABLE */ 85 86 #ifndef WOLFSSL_HAVE_MIN 87 #if defined(HAVE_FIPS) && !defined(min) /* so ifdef check passes */ 88 #define min min 89 #endif 90 WOLFSSL_LOCAL word32 min(word32 a, word32 b); 91 #endif 92 93 #ifndef WOLFSSL_HAVE_MAX 94 #if defined(HAVE_FIPS) && !defined(max) /* so ifdef check passes */ 95 #define max max 96 #endif 97 WOLFSSL_LOCAL word32 max(word32 a, word32 b); 98 #endif /* WOLFSSL_HAVE_MAX */ 99 100 101 void c32to24(word32 in, word24 out); 102 void c16toa(word16 u16, byte* c); 103 void c32toa(word32 u32, byte* c); 104 void c24to32(const word24 u24, word32* u32); 105 void ato16(const byte* c, word16* u16); 106 void ato24(const byte* c, word32* u24); 107 void ato32(const byte* c, word32* u32); 108 word32 btoi(byte b); 109 110 WOLFSSL_LOCAL signed char HexCharToByte(char ch); 111 WOLFSSL_LOCAL char ByteToHex(byte in); 112 WOLFSSL_LOCAL int ByteToHexStr(byte in, char* out); 113 114 WOLFSSL_LOCAL byte ctMaskGT(int a, int b); 115 WOLFSSL_LOCAL byte ctMaskGTE(int a, int b); 116 WOLFSSL_LOCAL int ctMaskIntGTE(int a, int b); 117 WOLFSSL_LOCAL byte ctMaskLT(int a, int b); 118 WOLFSSL_LOCAL byte ctMaskLTE(int a, int b); 119 WOLFSSL_LOCAL byte ctMaskEq(int a, int b); 120 WOLFSSL_LOCAL word16 ctMask16GT(int a, int b); 121 WOLFSSL_LOCAL word16 ctMask16GTE(int a, int b); 122 WOLFSSL_LOCAL word16 ctMask16LT(int a, int b); 123 WOLFSSL_LOCAL word16 ctMask16LTE(int a, int b); 124 WOLFSSL_LOCAL word16 ctMask16Eq(int a, int b); 125 WOLFSSL_LOCAL byte ctMaskNotEq(int a, int b); 126 WOLFSSL_LOCAL byte ctMaskSel(byte m, byte a, byte b); 127 WOLFSSL_LOCAL int ctMaskSelInt(byte m, int a, int b); 128 WOLFSSL_LOCAL byte ctSetLTE(int a, int b); 129 130 #endif /* NO_INLINE */ 131 132 133 #ifdef __cplusplus 134 } /* extern "C" */ 135 #endif 136 137 138 #endif /* WOLF_CRYPT_MISC_H */ 139 140