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annotate libtomcrypt/src/misc/crypt/crypt_constants.c @ 1885:5d8dbb6fdab7

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Fix SSH_PUBKEYINFO, limit characters, add tests We fix a bad_bufptr() failure from a previous commit. We now limit the allowed characters to those that will definitely be safe in a shell. Some scripts/programs may use arbitrary environment variables without escaping correctly - that could be a problem in a restricted environment. The current allowed set is a-z A-Z 0-9 .,_-+@ This also adds a test for SSH_PUBKEYINFO, by default it only runs under github actions (or "act -j build").
author Matt Johnston <matt@ucc.asn.au>
date Wed, 16 Mar 2022 17:17:23 +0800
parents e9dba7abd939
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1471
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1 /* LibTomCrypt, modular cryptographic library -- Tom St Denis
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2 *
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3 * LibTomCrypt is a library that provides various cryptographic
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4 * algorithms in a highly modular and flexible manner.
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5 *
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6 * The library is free for all purposes without any express
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7 * guarantee it works.
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8 */
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9 #include "tomcrypt.h"
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10
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11 /**
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12 @file crypt_constants.c
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13
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14 Make various constants available to dynamic languages
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15 like Python - Larry Bugbee, February 2013
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16
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17 LB - Dec 2013 - revised to include compiler define options
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18 LB - Mar 2014 - added endianness and word size
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19 */
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20
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21 typedef struct {
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22 const char *name;
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23 const int value;
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24 } crypt_constant;
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25
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26 #define _C_STRINGIFY(s) { #s, s }
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27
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28 static const crypt_constant _crypt_constants[] = {
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29
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30 _C_STRINGIFY(CRYPT_OK),
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31 _C_STRINGIFY(CRYPT_ERROR),
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32 _C_STRINGIFY(CRYPT_NOP),
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33 _C_STRINGIFY(CRYPT_INVALID_KEYSIZE),
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34 _C_STRINGIFY(CRYPT_INVALID_ROUNDS),
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35 _C_STRINGIFY(CRYPT_FAIL_TESTVECTOR),
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36 _C_STRINGIFY(CRYPT_BUFFER_OVERFLOW),
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37 _C_STRINGIFY(CRYPT_INVALID_PACKET),
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38 _C_STRINGIFY(CRYPT_INVALID_PRNGSIZE),
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39 _C_STRINGIFY(CRYPT_ERROR_READPRNG),
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40 _C_STRINGIFY(CRYPT_INVALID_CIPHER),
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41 _C_STRINGIFY(CRYPT_INVALID_HASH),
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42 _C_STRINGIFY(CRYPT_INVALID_PRNG),
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43 _C_STRINGIFY(CRYPT_MEM),
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44 _C_STRINGIFY(CRYPT_PK_TYPE_MISMATCH),
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45 _C_STRINGIFY(CRYPT_PK_NOT_PRIVATE),
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46 _C_STRINGIFY(CRYPT_INVALID_ARG),
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47 _C_STRINGIFY(CRYPT_FILE_NOTFOUND),
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48 _C_STRINGIFY(CRYPT_PK_INVALID_TYPE),
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49 _C_STRINGIFY(CRYPT_OVERFLOW),
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50 _C_STRINGIFY(CRYPT_UNUSED1),
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51 _C_STRINGIFY(CRYPT_INPUT_TOO_LONG),
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52 _C_STRINGIFY(CRYPT_PK_INVALID_SIZE),
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53 _C_STRINGIFY(CRYPT_INVALID_PRIME_SIZE),
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54 _C_STRINGIFY(CRYPT_PK_INVALID_PADDING),
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55 _C_STRINGIFY(CRYPT_HASH_OVERFLOW),
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56
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57 _C_STRINGIFY(PK_PUBLIC),
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58 _C_STRINGIFY(PK_PRIVATE),
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59
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60 _C_STRINGIFY(LTC_ENCRYPT),
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61 _C_STRINGIFY(LTC_DECRYPT),
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62
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63 #ifdef LTC_PKCS_1
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64 {"LTC_PKCS_1", 1},
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65 /* Block types */
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66 _C_STRINGIFY(LTC_PKCS_1_EMSA),
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67 _C_STRINGIFY(LTC_PKCS_1_EME),
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68
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69 /* Padding types */
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70 _C_STRINGIFY(LTC_PKCS_1_V1_5),
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71 _C_STRINGIFY(LTC_PKCS_1_OAEP),
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72 _C_STRINGIFY(LTC_PKCS_1_PSS),
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73 _C_STRINGIFY(LTC_PKCS_1_V1_5_NA1),
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74 #else
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75 {"LTC_PKCS_1", 0},
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76 #endif
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77
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78 #ifdef LTC_MRSA
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79 {"LTC_MRSA", 1},
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80 #else
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81 {"LTC_MRSA", 0},
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82 #endif
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83
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84 #ifdef LTC_MKAT
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85 {"LTC_MKAT", 1},
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86 _C_STRINGIFY(MIN_KAT_SIZE),
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87 _C_STRINGIFY(MAX_KAT_SIZE),
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88 #else
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89 {"LTC_MKAT", 0},
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90 #endif
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91
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92 #ifdef LTC_MECC
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93 {"LTC_MECC", 1},
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94 _C_STRINGIFY(ECC_BUF_SIZE),
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95 _C_STRINGIFY(ECC_MAXSIZE),
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96 #else
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97 {"LTC_MECC", 0},
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98 #endif
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99
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100 #ifdef LTC_MDSA
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101 {"LTC_MDSA", 1},
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102 _C_STRINGIFY(LTC_MDSA_DELTA),
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103 _C_STRINGIFY(LTC_MDSA_MAX_GROUP),
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104 #else
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105 {"LTC_MDSA", 0},
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106 #endif
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107
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108 #ifdef LTC_MILLER_RABIN_REPS
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109 _C_STRINGIFY(LTC_MILLER_RABIN_REPS),
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110 #endif
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111
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112 #ifdef LTC_DER
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113 /* DER handling */
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114 {"LTC_DER", 1},
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115 _C_STRINGIFY(LTC_ASN1_EOL),
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116 _C_STRINGIFY(LTC_ASN1_BOOLEAN),
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117 _C_STRINGIFY(LTC_ASN1_INTEGER),
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118 _C_STRINGIFY(LTC_ASN1_SHORT_INTEGER),
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119 _C_STRINGIFY(LTC_ASN1_BIT_STRING),
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120 _C_STRINGIFY(LTC_ASN1_OCTET_STRING),
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121 _C_STRINGIFY(LTC_ASN1_NULL),
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122 _C_STRINGIFY(LTC_ASN1_OBJECT_IDENTIFIER),
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123 _C_STRINGIFY(LTC_ASN1_IA5_STRING),
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124 _C_STRINGIFY(LTC_ASN1_PRINTABLE_STRING),
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125 _C_STRINGIFY(LTC_ASN1_UTF8_STRING),
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126 _C_STRINGIFY(LTC_ASN1_UTCTIME),
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127 _C_STRINGIFY(LTC_ASN1_CHOICE),
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128 _C_STRINGIFY(LTC_ASN1_SEQUENCE),
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129 _C_STRINGIFY(LTC_ASN1_SET),
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130 _C_STRINGIFY(LTC_ASN1_SETOF),
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131 _C_STRINGIFY(LTC_ASN1_RAW_BIT_STRING),
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132 _C_STRINGIFY(LTC_ASN1_TELETEX_STRING),
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133 _C_STRINGIFY(LTC_ASN1_CONSTRUCTED),
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134 _C_STRINGIFY(LTC_ASN1_CONTEXT_SPECIFIC),
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135 _C_STRINGIFY(LTC_ASN1_GENERALIZEDTIME),
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136 _C_STRINGIFY(LTC_DER_MAX_RECURSION),
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137 #else
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138 {"LTC_DER", 0},
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139 #endif
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140
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141 #ifdef LTC_CTR_MODE
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142 {"LTC_CTR_MODE", 1},
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143 _C_STRINGIFY(CTR_COUNTER_LITTLE_ENDIAN),
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144 _C_STRINGIFY(CTR_COUNTER_BIG_ENDIAN),
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145 _C_STRINGIFY(LTC_CTR_RFC3686),
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146 #else
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147 {"LTC_CTR_MODE", 0},
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148 #endif
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149 #ifdef LTC_GCM_MODE
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150 _C_STRINGIFY(LTC_GCM_MODE_IV),
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151 _C_STRINGIFY(LTC_GCM_MODE_AAD),
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152 _C_STRINGIFY(LTC_GCM_MODE_TEXT),
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153 #endif
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154
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155 _C_STRINGIFY(LTC_MP_LT),
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156 _C_STRINGIFY(LTC_MP_EQ),
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157 _C_STRINGIFY(LTC_MP_GT),
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158
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159 _C_STRINGIFY(LTC_MP_NO),
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160 _C_STRINGIFY(LTC_MP_YES),
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161
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162 _C_STRINGIFY(MAXBLOCKSIZE),
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163 _C_STRINGIFY(TAB_SIZE),
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164 _C_STRINGIFY(ARGTYPE),
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165
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166 #ifdef LTM_DESC
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167 {"LTM_DESC", 1},
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168 #else
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169 {"LTM_DESC", 0},
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170 #endif
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171 #ifdef TFM_DESC
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172 {"TFM_DESC", 1},
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173 #else
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174 {"TFM_DESC", 0},
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175 #endif
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176 #ifdef GMP_DESC
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177 {"GMP_DESC", 1},
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178 #else
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179 {"GMP_DESC", 0},
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180 #endif
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181
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182 #ifdef LTC_FAST
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183 {"LTC_FAST", 1},
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184 #else
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185 {"LTC_FAST", 0},
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186 #endif
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187
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188 #ifdef LTC_NO_FILE
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189 {"LTC_NO_FILE", 1},
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190 #else
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191 {"LTC_NO_FILE", 0},
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192 #endif
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193
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194 #ifdef ENDIAN_LITTLE
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195 {"ENDIAN_LITTLE", 1},
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196 #else
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197 {"ENDIAN_LITTLE", 0},
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198 #endif
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199
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200 #ifdef ENDIAN_BIG
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201 {"ENDIAN_BIG", 1},
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202 #else
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203 {"ENDIAN_BIG", 0},
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204 #endif
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205
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206 #ifdef ENDIAN_32BITWORD
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207 {"ENDIAN_32BITWORD", 1},
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208 #else
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209 {"ENDIAN_32BITWORD", 0},
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210 #endif
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211
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212 #ifdef ENDIAN_64BITWORD
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213 {"ENDIAN_64BITWORD", 1},
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214 #else
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215 {"ENDIAN_64BITWORD", 0},
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216 #endif
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217
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218 #ifdef ENDIAN_NEUTRAL
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219 {"ENDIAN_NEUTRAL", 1},
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220 #else
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221 {"ENDIAN_NEUTRAL", 0},
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222 #endif
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223 };
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224
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225
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226 /* crypt_get_constant()
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227 * valueout will be the value of the named constant
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228 * return -1 if named item not found
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229 */
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230 int crypt_get_constant(const char* namein, int *valueout) {
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231 int i;
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232 int _crypt_constants_len = sizeof(_crypt_constants) / sizeof(_crypt_constants[0]);
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233 for (i=0; i<_crypt_constants_len; i++) {
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234 if (XSTRCMP(_crypt_constants[i].name, namein) == 0) {
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235 *valueout = _crypt_constants[i].value;
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236 return 0;
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237 }
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238 }
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239 return 1;
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240 }
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241
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242 /* crypt_list_all_constants()
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243 * if names_list is NULL, names_list_size will be the minimum
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244 * number of bytes needed to receive the complete names_list
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245 * if names_list is NOT NULL, names_list must be the addr of
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246 * sufficient memory allocated into which the names_list
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247 * is to be written. Also, the value in names_list_size
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248 * sets the upper bound of the number of characters to be
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249 * written.
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250 * a -1 return value signifies insufficient space made available
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251 */
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252 int crypt_list_all_constants(char *names_list, unsigned int *names_list_size) {
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253 int i;
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254 unsigned int total_len = 0;
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255 char *ptr;
1471
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256 int number_len;
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257 int count = sizeof(_crypt_constants) / sizeof(_crypt_constants[0]);
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258
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259 /* calculate amount of memory required for the list */
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260 for (i=0; i<count; i++) {
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261 number_len = snprintf(NULL, 0, "%s,%d\n", _crypt_constants[i].name, _crypt_constants[i].value);
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262 if (number_len < 0)
1471
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263 return -1;
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264 total_len += number_len;
1471
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265 }
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266
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267 if (names_list == NULL) {
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268 *names_list_size = total_len;
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269 } else {
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270 if (total_len > *names_list_size) {
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271 return -1;
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272 }
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273 /* build the names list */
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274 ptr = names_list;
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275 for (i=0; i<count; i++) {
1711
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276 number_len = snprintf(ptr, total_len, "%s,%d\n", _crypt_constants[i].name, _crypt_constants[i].value);
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277 if (number_len < 0) return -1;
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278 if ((unsigned int)number_len > total_len) return -1;
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279 total_len -= number_len;
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280 ptr += number_len;
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281 }
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282 /* to remove the trailing new-line */
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283 ptr -= 1;
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284 *ptr = 0;
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285 }
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286 return 0;
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287 }
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288
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289
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290 /* ref: $Format:%D$ */
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291 /* git commit: $Format:%H$ */
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292 /* commit time: $Format:%ai$ */