1 | /* misc.h
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2 | *
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3 | * Copyright (C) 2006-2020 wolfSSL Inc.
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4 | *
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5 | * This file is part of wolfSSL.
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6 | *
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7 | * wolfSSL is free software; you can redistribute it and/or modify
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8 | * it under the terms of the GNU General Public License as published by
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9 | * the Free Software Foundation; either version 2 of the License, or
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10 | * (at your option) any later version.
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11 | *
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12 | * wolfSSL is distributed in the hope that it will be useful,
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13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 | * GNU General Public License for more details.
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16 | *
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17 | * You should have received a copy of the GNU General Public License
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18 | * along with this program; if not, write to the Free Software
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19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
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20 | */
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21 | /*
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22 |
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23 | DESCRIPTION
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24 | This module implements the arithmetic-shift right, left, byte swapping, XOR,
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25 | masking and clearing memory logic.
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26 |
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27 | */
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28 | #ifndef WOLF_CRYPT_MISC_H
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29 | #define WOLF_CRYPT_MISC_H
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30 |
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31 |
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32 | #include <wolfssl/wolfcrypt/types.h>
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33 |
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34 |
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35 | #ifdef __cplusplus
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36 | extern "C" {
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37 | #endif
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38 |
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39 |
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40 | #ifdef NO_INLINE
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41 | WOLFSSL_LOCAL
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42 | word32 rotlFixed(word32, word32);
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43 | WOLFSSL_LOCAL
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44 | word32 rotrFixed(word32, word32);
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45 |
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46 | #ifdef WC_RC2
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47 | WOLFSSL_LOCAL
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48 | word16 rotlFixed16(word16, word16);
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49 | WOLFSSL_LOCAL
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50 | word16 rotrFixed16(word16, word16);
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51 | #endif
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52 |
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53 | WOLFSSL_LOCAL
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54 | word32 ByteReverseWord32(word32);
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55 | WOLFSSL_LOCAL
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56 | void ByteReverseWords(word32*, const word32*, word32);
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57 |
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58 | WOLFSSL_LOCAL
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59 | void XorWordsOut(wolfssl_word* r, const wolfssl_word* a, const wolfssl_word* b,
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60 | word32 n);
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61 | WOLFSSL_LOCAL
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62 | void xorbufout(void*, const void*, const void*, word32);
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63 | WOLFSSL_LOCAL
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64 | void XorWords(wolfssl_word*, const wolfssl_word*, word32);
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65 | WOLFSSL_LOCAL
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66 | void xorbuf(void*, const void*, word32);
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67 |
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68 | WOLFSSL_LOCAL
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69 | void ForceZero(const void*, word32);
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70 |
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71 | WOLFSSL_LOCAL
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72 | int ConstantCompare(const byte*, const byte*, int);
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73 |
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74 | #ifdef WORD64_AVAILABLE
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75 | WOLFSSL_LOCAL
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76 | word64 rotlFixed64(word64, word64);
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77 | WOLFSSL_LOCAL
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78 | word64 rotrFixed64(word64, word64);
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79 |
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80 | WOLFSSL_LOCAL
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81 | word64 ByteReverseWord64(word64);
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82 | WOLFSSL_LOCAL
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83 | void ByteReverseWords64(word64*, const word64*, word32);
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84 | #endif /* WORD64_AVAILABLE */
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85 |
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86 | #ifndef WOLFSSL_HAVE_MIN
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87 | #if defined(HAVE_FIPS) && !defined(min) /* so ifdef check passes */
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88 | #define min min
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89 | #endif
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90 | WOLFSSL_LOCAL word32 min(word32 a, word32 b);
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91 | #endif
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92 |
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93 | #ifndef WOLFSSL_HAVE_MAX
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94 | #if defined(HAVE_FIPS) && !defined(max) /* so ifdef check passes */
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95 | #define max max
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96 | #endif
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97 | WOLFSSL_LOCAL word32 max(word32 a, word32 b);
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98 | #endif /* WOLFSSL_HAVE_MAX */
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99 |
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100 |
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101 | void c32to24(word32 in, word24 out);
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102 | void c16toa(word16 u16, byte* c);
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103 | void c32toa(word32 u32, byte* c);
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104 | void c24to32(const word24 u24, word32* u32);
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105 | void ato16(const byte* c, word16* u16);
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106 | void ato24(const byte* c, word32* u24);
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107 | void ato32(const byte* c, word32* u32);
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108 | word32 btoi(byte b);
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109 |
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110 |
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111 | WOLFSSL_LOCAL byte ctMaskGT(int a, int b);
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112 | WOLFSSL_LOCAL byte ctMaskGTE(int a, int b);
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113 | WOLFSSL_LOCAL int ctMaskIntGTE(int a, int b);
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114 | WOLFSSL_LOCAL byte ctMaskLT(int a, int b);
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115 | WOLFSSL_LOCAL byte ctMaskLTE(int a, int b);
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116 | WOLFSSL_LOCAL byte ctMaskEq(int a, int b);
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117 | WOLFSSL_LOCAL word16 ctMask16GT(int a, int b);
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118 | WOLFSSL_LOCAL word16 ctMask16GTE(int a, int b);
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119 | WOLFSSL_LOCAL word16 ctMask16LT(int a, int b);
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120 | WOLFSSL_LOCAL word16 ctMask16LTE(int a, int b);
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121 | WOLFSSL_LOCAL word16 ctMask16Eq(int a, int b);
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122 | WOLFSSL_LOCAL byte ctMaskNotEq(int a, int b);
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123 | WOLFSSL_LOCAL byte ctMaskSel(byte m, byte a, byte b);
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124 | WOLFSSL_LOCAL int ctMaskSelInt(byte m, int a, int b);
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125 | WOLFSSL_LOCAL byte ctSetLTE(int a, int b);
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126 |
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127 | #endif /* NO_INLINE */
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128 |
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129 |
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130 | #ifdef __cplusplus
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131 | } /* extern "C" */
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132 | #endif
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133 |
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134 |
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135 | #endif /* WOLF_CRYPT_MISC_H */
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136 |
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