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annotate nss/lib/softoken/legacydb/lgutil.c @ 3:150b72113545

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Add DBM and legacydb support
author Andre Heinecke <andre.heinecke@intevation.de>
date Tue, 05 Aug 2014 18:32:02 +0200
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150b72113545 Add DBM and legacydb support
Andre Heinecke <andre.heinecke@intevation.de>
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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 #include "lgdb.h"
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5 #include "secerr.h"
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6 #include "lgglue.h"
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7
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8 /*
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9 * ******************** Attribute Utilities *******************************
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10 */
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11
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12 /*
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13 * look up and attribute structure from a type and Object structure.
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14 * The returned attribute is referenced and needs to be freed when
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15 * it is no longer needed.
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16 */
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17 const CK_ATTRIBUTE *
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18 lg_FindAttribute(CK_ATTRIBUTE_TYPE type, const CK_ATTRIBUTE *templ,
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19 CK_ULONG count )
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20 {
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21 unsigned int i;
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22
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23 for (i=0; i < count; i++) {
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24 if (templ[i].type == type) {
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25 return &templ[i];
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26 }
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27 }
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28 return NULL;
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29 }
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30
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31
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32 /*
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33 * return true if object has attribute
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34 */
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35 PRBool
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36 lg_hasAttribute(CK_ATTRIBUTE_TYPE type, const CK_ATTRIBUTE *templ,
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37 CK_ULONG count )
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38 {
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39 if (lg_FindAttribute(type, templ, count) == NULL) {
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40 return PR_FALSE;
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41 }
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42 return PR_TRUE;
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43 }
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44
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45 /*
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46 * copy an attribute into a SECItem. Secitem is allocated in the specified
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47 * arena.
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48 */
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49 CK_RV
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50 lg_Attribute2SecItem(PLArenaPool *arena, CK_ATTRIBUTE_TYPE type,
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51 const CK_ATTRIBUTE *templ, CK_ULONG count,
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52 SECItem *item)
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53 {
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54 int len;
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55 const CK_ATTRIBUTE *attribute;
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56
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57 attribute = lg_FindAttribute(type, templ, count);
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58 if (attribute == NULL) return CKR_TEMPLATE_INCOMPLETE;
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59 len = attribute->ulValueLen;
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60
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61 if (arena) {
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62 item->data = (unsigned char *) PORT_ArenaAlloc(arena,len);
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63 } else {
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64 item->data = (unsigned char *) PORT_Alloc(len);
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65 }
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66 if (item->data == NULL) {
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67 return CKR_HOST_MEMORY;
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68 }
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69 item->len = len;
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70 PORT_Memcpy(item->data, attribute->pValue, len);
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71 return CKR_OK;
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72 }
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73
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74
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75 /*
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76 * copy an unsigned attribute into a SECItem. Secitem is allocated in
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77 * the specified arena.
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78 */
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79 CK_RV
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80 lg_Attribute2SSecItem(PLArenaPool *arena, CK_ATTRIBUTE_TYPE type,
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81 const CK_ATTRIBUTE *templ, CK_ULONG count,
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82 SECItem *item)
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83 {
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84 const CK_ATTRIBUTE *attribute;
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85 item->data = NULL;
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86
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87 attribute = lg_FindAttribute(type, templ, count);
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88 if (attribute == NULL) return CKR_TEMPLATE_INCOMPLETE;
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89
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90 (void)SECITEM_AllocItem(arena, item, attribute->ulValueLen);
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91 if (item->data == NULL) {
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92 return CKR_HOST_MEMORY;
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93 }
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94 PORT_Memcpy(item->data, attribute->pValue, item->len);
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95 return CKR_OK;
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96 }
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97
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98 /*
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99 * copy an unsigned attribute into a SECItem. Secitem is allocated in
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100 * the specified arena.
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101 */
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102 CK_RV
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103 lg_PrivAttr2SSecItem(PLArenaPool *arena, CK_ATTRIBUTE_TYPE type,
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104 const CK_ATTRIBUTE *templ, CK_ULONG count,
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105 SECItem *item, SDB *sdbpw)
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106 {
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107 const CK_ATTRIBUTE *attribute;
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108 SECItem epki, *dest = NULL;
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109 SECStatus rv;
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110
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111 item->data = NULL;
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112
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113 attribute = lg_FindAttribute(type, templ, count);
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114 if (attribute == NULL) return CKR_TEMPLATE_INCOMPLETE;
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115
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116 epki.data = attribute->pValue;
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117 epki.len = attribute->ulValueLen;
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118
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119 rv = lg_util_decrypt(sdbpw, &epki, &dest);
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120 if (rv != SECSuccess) {
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121 return CKR_USER_NOT_LOGGED_IN;
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122 }
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123 (void)SECITEM_AllocItem(arena, item, dest->len);
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124 if (item->data == NULL) {
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125 SECITEM_FreeItem(dest, PR_TRUE);
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126 return CKR_HOST_MEMORY;
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127 }
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128
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129 PORT_Memcpy(item->data, dest->data, item->len);
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130 SECITEM_FreeItem(dest, PR_TRUE);
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131 return CKR_OK;
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132 }
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133
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134 CK_RV
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135 lg_PrivAttr2SecItem(PLArenaPool *arena, CK_ATTRIBUTE_TYPE type,
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136 const CK_ATTRIBUTE *templ, CK_ULONG count,
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137 SECItem *item, SDB *sdbpw)
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138 {
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139 return lg_PrivAttr2SSecItem(arena, type, templ, count, item, sdbpw);
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140 }
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141
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142 /*
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143 * this is only valid for CK_BBOOL type attributes. Return the state
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144 * of that attribute.
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145 */
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146 PRBool
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147 lg_isTrue(CK_ATTRIBUTE_TYPE type, const CK_ATTRIBUTE *templ, CK_ULONG count)
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148 {
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149 const CK_ATTRIBUTE *attribute;
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150 PRBool tok = PR_FALSE;
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151
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152 attribute=lg_FindAttribute(type, templ, count);
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153 if (attribute == NULL) { return PR_FALSE; }
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154 tok = (PRBool)(*(CK_BBOOL *)attribute->pValue);
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155
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156 return tok;
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157 }
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158
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159 /*
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160 * return a null terminated string from attribute 'type'. This string
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161 * is allocated and needs to be freed with PORT_Free() When complete.
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162 */
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163 char *
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164 lg_getString(CK_ATTRIBUTE_TYPE type, const CK_ATTRIBUTE *templ, CK_ULONG count)
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165 {
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166 const CK_ATTRIBUTE *attribute;
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167 char *label = NULL;
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168
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169 attribute = lg_FindAttribute(type, templ, count);
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170 if (attribute == NULL) return NULL;
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171
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172 if (attribute->pValue != NULL) {
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173 label = (char *) PORT_Alloc(attribute->ulValueLen+1);
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174 if (label == NULL) {
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175 return NULL;
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176 }
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177
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178 PORT_Memcpy(label,attribute->pValue, attribute->ulValueLen);
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179 label[attribute->ulValueLen] = 0;
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180 }
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181 return label;
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182 }
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183
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184 CK_RV
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185 lg_GetULongAttribute(CK_ATTRIBUTE_TYPE type, const CK_ATTRIBUTE *templ,
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186 CK_ULONG count, CK_ULONG *longData)
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187 {
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188 const CK_ATTRIBUTE *attribute;
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189 CK_ULONG value = 0;
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190 const unsigned char *data;
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191 int i;
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192
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193 attribute = lg_FindAttribute(type, templ, count);
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194 if (attribute == NULL) return CKR_TEMPLATE_INCOMPLETE;
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195
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196 if (attribute->ulValueLen != 4) {
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197 return CKR_ATTRIBUTE_VALUE_INVALID;
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198 }
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199 data = (const unsigned char *)attribute->pValue;
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200 for (i=0; i < 4; i++) {
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201 value |= (CK_ULONG)(data[i]) << ((3-i)*8);
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202 }
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203
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204 *longData = value;
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205 return CKR_OK;
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206 }
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207
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208 /*
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209 * ******************** Object Utilities *******************************
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210 */
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211
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212 SECStatus
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213 lg_deleteTokenKeyByHandle(SDB *sdb, CK_OBJECT_HANDLE handle)
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214 {
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215 SECItem *item;
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216 PRBool rem;
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217 PLHashTable *hashTable= lg_GetHashTable(sdb);
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218
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219 item = (SECItem *)PL_HashTableLookup(hashTable, (void *)handle);
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220 rem = PL_HashTableRemove(hashTable,(void *)handle) ;
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221 if (rem && item) {
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222 SECITEM_FreeItem(item,PR_TRUE);
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223 }
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224 return rem ? SECSuccess : SECFailure;
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225 }
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226
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227 /* must be called holding lg_DBLock(sdb) */
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228 static SECStatus
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229 lg_addTokenKeyByHandle(SDB *sdb, CK_OBJECT_HANDLE handle, SECItem *key)
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230 {
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231 PLHashEntry *entry;
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232 SECItem *item;
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233 PLHashTable *hashTable= lg_GetHashTable(sdb);
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234
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235 item = SECITEM_DupItem(key);
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236 if (item == NULL) {
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237 return SECFailure;
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238 }
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239 entry = PL_HashTableAdd(hashTable,(void *)handle,item);
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240 if (entry == NULL) {
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241 SECITEM_FreeItem(item,PR_TRUE);
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242 return SECFailure;
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243 }
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244 return SECSuccess;
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245 }
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246
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247 /* must be called holding lg_DBLock(sdb) */
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248 const SECItem *
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249 lg_lookupTokenKeyByHandle(SDB *sdb, CK_OBJECT_HANDLE handle)
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250 {
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251 PLHashTable *hashTable= lg_GetHashTable(sdb);
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252 return (const SECItem *)PL_HashTableLookup(hashTable, (void *)handle);
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253 }
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254
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255
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256 static PRIntn
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257 lg_freeHashItem(PLHashEntry* entry, PRIntn index, void *arg)
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258 {
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259 SECItem *item = (SECItem *)entry->value;
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260
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261 SECITEM_FreeItem(item, PR_TRUE);
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262 return HT_ENUMERATE_NEXT;
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263 }
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264
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265 CK_RV
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266 lg_ClearTokenKeyHashTable(SDB *sdb)
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267 {
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268 PLHashTable *hashTable;
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269 lg_DBLock(sdb);
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270 hashTable= lg_GetHashTable(sdb);
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271 PL_HashTableEnumerateEntries(hashTable, lg_freeHashItem, NULL);
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272 lg_DBUnlock(sdb);
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273 return CKR_OK;
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274 }
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275
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276 /*
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277 * handle Token Object stuff
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278 */
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279 static void
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280 lg_XORHash(unsigned char *key, unsigned char *dbkey, int len)
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281 {
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282 int i;
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283
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284 PORT_Memset(key, 0, 4);
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285
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286 for (i=0; i < len-4; i += 4) {
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287 key[0] ^= dbkey[i];
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288 key[1] ^= dbkey[i+1];
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289 key[2] ^= dbkey[i+2];
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290 key[3] ^= dbkey[i+3];
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291 }
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292 }
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293
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294 /* Make a token handle for an object and record it so we can find it again */
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295 CK_OBJECT_HANDLE
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296 lg_mkHandle(SDB *sdb, SECItem *dbKey, CK_OBJECT_HANDLE class)
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297 {
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298 unsigned char hashBuf[4];
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299 CK_OBJECT_HANDLE handle;
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300 const SECItem *key;
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301
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302 handle = class;
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303 /* there is only one KRL, use a fixed handle for it */
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304 if (handle != LG_TOKEN_KRL_HANDLE) {
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305 lg_XORHash(hashBuf,dbKey->data,dbKey->len);
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306 handle = (hashBuf[0] << 24) | (hashBuf[1] << 16) |
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307 (hashBuf[2] << 8) | hashBuf[3];
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308 handle = class | (handle & ~(LG_TOKEN_TYPE_MASK|LG_TOKEN_MASK));
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309 /* we have a CRL who's handle has randomly matched the reserved KRL
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310 * handle, increment it */
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311 if (handle == LG_TOKEN_KRL_HANDLE) {
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312 handle++;
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313 }
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314 }
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315
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316 lg_DBLock(sdb);
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317 while ((key = lg_lookupTokenKeyByHandle(sdb,handle)) != NULL) {
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318 if (SECITEM_ItemsAreEqual(key,dbKey)) {
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319 lg_DBUnlock(sdb);
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320 return handle;
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321 }
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322 handle++;
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323 }
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324 lg_addTokenKeyByHandle(sdb,handle,dbKey);
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325 lg_DBUnlock(sdb);
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326 return handle;
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327 }
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328
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329 PRBool
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330 lg_poisonHandle(SDB *sdb, SECItem *dbKey, CK_OBJECT_HANDLE class)
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331 {
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332 unsigned char hashBuf[4];
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333 CK_OBJECT_HANDLE handle;
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334 const SECItem *key;
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335
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336 handle = class;
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337 /* there is only one KRL, use a fixed handle for it */
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338 if (handle != LG_TOKEN_KRL_HANDLE) {
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339 lg_XORHash(hashBuf,dbKey->data,dbKey->len);
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340 handle = (hashBuf[0] << 24) | (hashBuf[1] << 16) |
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341 (hashBuf[2] << 8) | hashBuf[3];
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342 handle = class | (handle & ~(LG_TOKEN_TYPE_MASK|LG_TOKEN_MASK));
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343 /* we have a CRL who's handle has randomly matched the reserved KRL
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344 * handle, increment it */
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345 if (handle == LG_TOKEN_KRL_HANDLE) {
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346 handle++;
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347 }
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348 }
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349 lg_DBLock(sdb);
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350 while ((key = lg_lookupTokenKeyByHandle(sdb,handle)) != NULL) {
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351 if (SECITEM_ItemsAreEqual(key,dbKey)) {
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352 key->data[0] ^= 0x80;
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353 lg_DBUnlock(sdb);
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354 return PR_TRUE;
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355 }
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356 handle++;
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357 }
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358 lg_DBUnlock(sdb);
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359 return PR_FALSE;
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360 }
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361
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362 static LGEncryptFunc lg_encrypt_stub = NULL;
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363 static LGDecryptFunc lg_decrypt_stub = NULL;
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364
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365 void
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366 legacy_SetCryptFunctions(LGEncryptFunc enc, LGDecryptFunc dec)
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367 {
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368 lg_encrypt_stub = enc;
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369 lg_decrypt_stub = dec;
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370 }
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371
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372 SECStatus lg_util_encrypt(PLArenaPool *arena, SDB *sdb,
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373 SECItem *plainText, SECItem **cipherText)
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374 {
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375 if (lg_encrypt_stub == NULL) {
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376 PORT_SetError(SEC_ERROR_LIBRARY_FAILURE);
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377 return SECFailure;
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378 }
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379 return (*lg_encrypt_stub)(arena, sdb, plainText, cipherText);
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380 }
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381
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382 SECStatus lg_util_decrypt(SDB *sdb, SECItem *cipherText, SECItem **plainText)
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383 {
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384 if (lg_decrypt_stub == NULL) {
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385 PORT_SetError(SEC_ERROR_LIBRARY_FAILURE);
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386 return SECFailure;
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387 }
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388 return (*lg_decrypt_stub)(sdb, cipherText, plainText);
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389 }
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390
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391
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