Mercurial > trustbridge > nss-cmake-static
annotate nss/lib/libpkix/pkix_pl_nss/system/pkix_pl_bigint.c @ 4:b513267f632f tip
Build DBM module
author | Andre Heinecke <andre.heinecke@intevation.de> |
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date | Tue, 05 Aug 2014 18:58:03 +0200 |
parents | 1e5118fa0cb1 |
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rev | line source |
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0
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1 /* This Source Code Form is subject to the terms of the Mozilla Public |
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2 * License, v. 2.0. If a copy of the MPL was not distributed with this |
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3 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
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4 /* |
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5 * pkix_pl_bigint.c |
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6 * |
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7 * BigInt Object Functions |
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8 * |
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9 */ |
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10 |
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11 #include "pkix_pl_bigint.h" |
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12 |
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13 /* --Private-Big-Int-Functions------------------------------------ */ |
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14 |
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15 /* |
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16 * FUNCTION: pkix_pl_BigInt_Comparator |
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17 * (see comments for PKIX_PL_ComparatorCallback in pkix_pl_system.h) |
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18 */ |
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19 static PKIX_Error * |
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20 pkix_pl_BigInt_Comparator( |
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21 PKIX_PL_Object *firstObject, |
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22 PKIX_PL_Object *secondObject, |
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23 PKIX_Int32 *pResult, |
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24 void *plContext) |
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25 { |
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26 PKIX_PL_BigInt *firstBigInt = NULL; |
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27 PKIX_PL_BigInt *secondBigInt = NULL; |
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28 char *firstPtr = NULL; |
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29 char *secondPtr = NULL; |
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30 PKIX_UInt32 firstLen, secondLen; |
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31 |
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32 PKIX_ENTER(BIGINT, "pkix_pl_BigInt_Comparator"); |
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33 PKIX_NULLCHECK_THREE(firstObject, secondObject, pResult); |
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34 |
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35 PKIX_CHECK(pkix_CheckTypes |
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36 (firstObject, secondObject, PKIX_BIGINT_TYPE, plContext), |
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37 PKIX_ARGUMENTSNOTBIGINTS); |
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38 |
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39 /* It's safe to cast */ |
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40 firstBigInt = (PKIX_PL_BigInt*)firstObject; |
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41 secondBigInt = (PKIX_PL_BigInt*)secondObject; |
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42 |
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43 *pResult = 0; |
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44 firstPtr = firstBigInt->dataRep; |
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45 secondPtr = secondBigInt->dataRep; |
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46 firstLen = firstBigInt->length; |
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47 secondLen = secondBigInt->length; |
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48 |
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49 if (firstLen < secondLen) { |
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50 *pResult = -1; |
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51 } else if (firstLen > secondLen) { |
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52 *pResult = 1; |
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53 } else if (firstLen == secondLen) { |
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54 PKIX_BIGINT_DEBUG("\t\tCalling PORT_Memcmp).\n"); |
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55 *pResult = PORT_Memcmp(firstPtr, secondPtr, firstLen); |
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56 } |
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57 |
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58 cleanup: |
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59 |
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60 PKIX_RETURN(BIGINT); |
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61 } |
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62 |
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63 /* |
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64 * FUNCTION: pkix_pl_BigInt_Destroy |
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65 * (see comments for PKIX_PL_DestructorCallback in pkix_pl_system.h) |
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66 */ |
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67 static PKIX_Error * |
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68 pkix_pl_BigInt_Destroy( |
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69 PKIX_PL_Object *object, |
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70 void *plContext) |
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71 { |
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72 PKIX_PL_BigInt *bigInt = NULL; |
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73 |
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74 PKIX_ENTER(BIGINT, "pkix_pl_BigInt_Destroy"); |
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75 PKIX_NULLCHECK_ONE(object); |
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76 |
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77 PKIX_CHECK(pkix_CheckType(object, PKIX_BIGINT_TYPE, plContext), |
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78 PKIX_OBJECTNOTBIGINT); |
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79 |
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80 bigInt = (PKIX_PL_BigInt*)object; |
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81 |
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82 PKIX_FREE(bigInt->dataRep); |
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83 bigInt->dataRep = NULL; |
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84 bigInt->length = 0; |
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85 |
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86 cleanup: |
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87 |
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88 PKIX_RETURN(BIGINT); |
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89 } |
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90 |
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91 |
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92 /* |
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93 * FUNCTION: pkix_pl_BigInt_ToString |
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94 * (see comments for PKIX_PL_ToStringCallback in pkix_pl_system.h) |
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95 */ |
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96 static PKIX_Error * |
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97 pkix_pl_BigInt_ToString( |
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98 PKIX_PL_Object *object, |
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99 PKIX_PL_String **pString, |
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100 void *plContext) |
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101 { |
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102 PKIX_PL_BigInt *bigInt = NULL; |
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103 char *outputText = NULL; |
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104 PKIX_UInt32 i, j, lengthChars; |
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105 |
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106 PKIX_ENTER(BIGINT, "pkix_pl_BigInt_ToString"); |
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107 PKIX_NULLCHECK_TWO(object, pString); |
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108 |
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109 PKIX_CHECK(pkix_CheckType(object, PKIX_BIGINT_TYPE, plContext), |
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110 PKIX_OBJECTNOTBIGINT); |
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111 |
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112 bigInt = (PKIX_PL_BigInt*)object; |
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113 |
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114 /* number of chars = 2 * (number of bytes) + null terminator */ |
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115 lengthChars = (bigInt->length * 2) + 1; |
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116 |
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117 PKIX_CHECK(PKIX_PL_Malloc |
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118 (lengthChars, (void **)&outputText, plContext), |
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119 PKIX_MALLOCFAILED); |
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120 |
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121 for (i = 0, j = 0; i < bigInt->length; i += 1, j += 2){ |
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122 outputText[j] = pkix_i2hex |
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123 ((char) ((*(bigInt->dataRep+i) & 0xf0) >> 4)); |
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124 outputText[j+1] = pkix_i2hex |
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125 ((char) (*(bigInt->dataRep+i) & 0x0f)); |
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126 } |
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127 |
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128 outputText[lengthChars-1] = '\0'; |
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129 |
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130 PKIX_CHECK(PKIX_PL_String_Create |
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131 (PKIX_ESCASCII, |
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132 outputText, |
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133 0, |
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134 pString, |
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135 plContext), |
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136 PKIX_STRINGCREATEFAILED); |
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137 |
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138 cleanup: |
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139 |
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140 PKIX_FREE(outputText); |
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141 |
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142 PKIX_RETURN(BIGINT); |
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143 } |
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144 |
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145 |
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146 /* |
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147 * FUNCTION: pkix_pl_BigInt_Hashcode |
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148 * (see comments for PKIX_PL_HashcodeCallback in pkix_pl_system.h) |
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149 */ |
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150 static PKIX_Error * |
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151 pkix_pl_BigInt_Hashcode( |
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152 PKIX_PL_Object *object, |
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153 PKIX_UInt32 *pHashcode, |
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154 void *plContext) |
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155 { |
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156 PKIX_PL_BigInt *bigInt = NULL; |
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157 |
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158 PKIX_ENTER(BIGINT, "pkix_pl_BigInt_Hashcode"); |
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159 PKIX_NULLCHECK_TWO(object, pHashcode); |
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160 |
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161 PKIX_CHECK(pkix_CheckType(object, PKIX_BIGINT_TYPE, plContext), |
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162 PKIX_OBJECTNOTBIGINT); |
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163 |
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164 bigInt = (PKIX_PL_BigInt*)object; |
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165 |
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166 PKIX_CHECK(pkix_hash |
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167 ((void *)bigInt->dataRep, |
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168 bigInt->length, |
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169 pHashcode, |
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170 plContext), |
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171 PKIX_HASHFAILED); |
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172 |
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173 cleanup: |
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174 |
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175 PKIX_RETURN(BIGINT); |
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176 } |
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177 |
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178 /* |
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179 * FUNCTION: pkix_pl_BigInt_Equals |
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180 * (see comments for PKIX_PL_EqualsCallback in pkix_pl_system.h) |
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181 */ |
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182 static PKIX_Error * |
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183 pkix_pl_BigInt_Equals( |
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184 PKIX_PL_Object *first, |
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185 PKIX_PL_Object *second, |
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186 PKIX_Boolean *pResult, |
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187 void *plContext) |
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188 { |
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189 PKIX_UInt32 secondType; |
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190 PKIX_Int32 cmpResult = 0; |
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191 |
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192 PKIX_ENTER(BIGINT, "pkix_pl_BigInt_Equals"); |
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193 PKIX_NULLCHECK_THREE(first, second, pResult); |
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194 |
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195 PKIX_CHECK(pkix_CheckType(first, PKIX_BIGINT_TYPE, plContext), |
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196 PKIX_FIRSTOBJECTNOTBIGINT); |
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197 |
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198 PKIX_CHECK(PKIX_PL_Object_GetType(second, &secondType, plContext), |
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199 PKIX_COULDNOTGETTYPEOFSECONDARGUMENT); |
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200 |
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201 *pResult = PKIX_FALSE; |
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202 |
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203 if (secondType != PKIX_BIGINT_TYPE) goto cleanup; |
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204 |
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205 PKIX_CHECK(pkix_pl_BigInt_Comparator |
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206 (first, second, &cmpResult, plContext), |
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207 PKIX_BIGINTCOMPARATORFAILED); |
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208 |
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209 *pResult = (cmpResult == 0); |
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210 |
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211 cleanup: |
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212 |
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213 PKIX_RETURN(BIGINT); |
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214 } |
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215 |
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216 /* |
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217 * FUNCTION: pkix_pl_BigInt_RegisterSelf |
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218 * DESCRIPTION: |
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219 * Registers PKIX_BIGINT_TYPE and its related functions with systemClasses[] |
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220 * THREAD SAFETY: |
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221 * Not Thread Safe - for performance and complexity reasons |
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222 * |
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223 * Since this function is only called by PKIX_PL_Initialize, which should |
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224 * only be called once, it is acceptable that this function is not |
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225 * thread-safe. |
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226 */ |
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227 PKIX_Error * |
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228 pkix_pl_BigInt_RegisterSelf(void *plContext) |
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229 { |
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230 |
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231 extern pkix_ClassTable_Entry systemClasses[PKIX_NUMTYPES]; |
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232 pkix_ClassTable_Entry entry; |
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233 |
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234 PKIX_ENTER(BIGINT, "pkix_pl_BigInt_RegisterSelf"); |
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235 |
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236 entry.description = "BigInt"; |
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237 entry.objCounter = 0; |
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238 entry.typeObjectSize = sizeof(PKIX_PL_BigInt); |
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239 entry.destructor = pkix_pl_BigInt_Destroy; |
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240 entry.equalsFunction = pkix_pl_BigInt_Equals; |
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241 entry.hashcodeFunction = pkix_pl_BigInt_Hashcode; |
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242 entry.toStringFunction = pkix_pl_BigInt_ToString; |
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243 entry.comparator = pkix_pl_BigInt_Comparator; |
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244 entry.duplicateFunction = pkix_duplicateImmutable; |
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245 |
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246 systemClasses[PKIX_BIGINT_TYPE] = entry; |
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247 |
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248 PKIX_RETURN(BIGINT); |
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249 } |
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250 |
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251 /* |
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252 * FUNCTION: pkix_pl_BigInt_CreateWithBytes |
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253 * DESCRIPTION: |
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254 * |
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255 * Creates a new BigInt of size "length" representing the array of bytes |
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256 * pointed to by "bytes" and stores it at "pBigInt". The caller should make |
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257 * sure that the first byte is not 0x00 (unless it is the the only byte). |
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258 * This function does not do that checking. |
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259 * |
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260 * Once created, a PKIX_PL_BigInt object is immutable. |
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261 * |
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262 * PARAMETERS: |
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263 * "bytes" |
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264 * Address of array of bytes. Must be non-NULL. |
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265 * "length" |
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266 * Length of the array. Must be non-zero. |
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267 * "pBigInt" |
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268 * Address where object pointer will be stored. Must be non-NULL. |
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269 * "plContext" - Platform-specific context pointer. |
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270 * THREAD SAFETY: |
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271 * Thread Safe (see Thread Safety Definitions in Programmer's Guide) |
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272 * RETURNS: |
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273 * Returns NULL if the function succeeds. |
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274 * Returns a Fatal Error if the function fails in an unrecoverable way. |
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275 */ |
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276 PKIX_Error * |
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277 pkix_pl_BigInt_CreateWithBytes( |
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278 char *bytes, |
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279 PKIX_UInt32 length, |
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280 PKIX_PL_BigInt **pBigInt, |
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281 void *plContext) |
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282 { |
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283 PKIX_PL_BigInt *bigInt = NULL; |
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284 |
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285 PKIX_ENTER(BIGINT, "pkix_pl_BigInt_CreateWithBytes"); |
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286 PKIX_NULLCHECK_TWO(pBigInt, bytes); |
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287 |
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288 if (length == 0) { |
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289 PKIX_ERROR(PKIX_BIGINTLENGTH0INVALID) |
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290 } |
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291 |
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292 PKIX_CHECK(PKIX_PL_Object_Alloc |
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293 (PKIX_BIGINT_TYPE, |
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294 sizeof (PKIX_PL_BigInt), |
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295 (PKIX_PL_Object **)&bigInt, |
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296 plContext), |
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297 PKIX_COULDNOTCREATEOBJECT); |
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298 |
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299 PKIX_CHECK(PKIX_PL_Malloc |
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300 (length, (void **)&(bigInt->dataRep), plContext), |
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301 PKIX_MALLOCFAILED); |
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302 |
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303 PKIX_BIGINT_DEBUG("\t\tCalling PORT_Memcpy).\n"); |
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304 (void) PORT_Memcpy(bigInt->dataRep, bytes, length); |
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305 |
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306 bigInt->length = length; |
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307 |
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308 *pBigInt = bigInt; |
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309 |
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310 cleanup: |
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311 |
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312 if (PKIX_ERROR_RECEIVED){ |
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313 PKIX_DECREF(bigInt); |
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314 } |
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315 |
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316 PKIX_RETURN(BIGINT); |
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317 } |
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318 |
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319 /* --Public-Functions------------------------------------------------------- */ |
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320 |
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321 /* |
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322 * FUNCTION: PKIX_PL_BigInt_Create (see comments in pkix_pl_system.h) |
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323 */ |
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324 PKIX_Error * |
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325 PKIX_PL_BigInt_Create( |
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326 PKIX_PL_String *stringRep, |
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327 PKIX_PL_BigInt **pBigInt, |
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328 void *plContext) |
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329 { |
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330 PKIX_PL_BigInt *bigInt = NULL; |
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331 char *asciiString = NULL; |
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332 PKIX_UInt32 lengthBytes; |
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333 PKIX_UInt32 lengthString; |
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334 PKIX_UInt32 i; |
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335 char currChar; |
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336 |
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337 PKIX_ENTER(BIGINT, "PKIX_PL_BigInt_Create"); |
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338 PKIX_NULLCHECK_TWO(pBigInt, stringRep); |
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339 |
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340 PKIX_CHECK(PKIX_PL_String_GetEncoded |
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341 (stringRep, |
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342 PKIX_ESCASCII, |
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343 (void **)&asciiString, |
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344 &lengthString, |
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345 plContext), |
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346 PKIX_STRINGGETENCODEDFAILED); |
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347 |
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348 if ((lengthString == 0) || ((lengthString % 2) != 0)){ |
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349 PKIX_ERROR(PKIX_SOURCESTRINGHASINVALIDLENGTH); |
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350 } |
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351 |
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352 if (lengthString != 2){ |
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353 if ((asciiString[0] == '0') && (asciiString[1] == '0')){ |
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354 PKIX_ERROR(PKIX_FIRSTDOUBLEHEXMUSTNOTBE00); |
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355 } |
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356 } |
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357 |
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358 for (i = 0; i < lengthString; i++) { |
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359 currChar = asciiString[i]; |
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360 if (!PKIX_ISXDIGIT(currChar)){ |
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361 PKIX_ERROR(PKIX_INVALIDCHARACTERINBIGINT); |
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362 } |
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363 } |
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364 |
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365 PKIX_CHECK(PKIX_PL_Object_Alloc |
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366 (PKIX_BIGINT_TYPE, |
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367 sizeof (PKIX_PL_BigInt), |
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368 (PKIX_PL_Object **)&bigInt, |
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369 plContext), |
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370 PKIX_COULDNOTCREATEOBJECT); |
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371 |
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372 /* number of bytes = 0.5 * (number of chars) */ |
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373 lengthBytes = lengthString/2; |
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374 |
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375 PKIX_CHECK(PKIX_PL_Malloc |
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376 (lengthBytes, (void **)&(bigInt->dataRep), plContext), |
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377 PKIX_MALLOCFAILED); |
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378 |
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379 for (i = 0; i < lengthString; i += 2){ |
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380 (bigInt->dataRep)[i/2] = |
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381 (pkix_hex2i(asciiString[i])<<4) | |
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382 pkix_hex2i(asciiString[i+1]); |
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383 } |
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384 |
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385 bigInt->length = lengthBytes; |
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386 |
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387 *pBigInt = bigInt; |
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388 |
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389 cleanup: |
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390 |
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391 PKIX_FREE(asciiString); |
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392 |
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393 if (PKIX_ERROR_RECEIVED){ |
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394 PKIX_DECREF(bigInt); |
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395 } |
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396 |
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397 PKIX_RETURN(BIGINT); |
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398 } |