1 | |
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2 | /***********************************************************************/ |
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3 | /* clause generation called to generate credential clauses with a */ |
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4 | /* given credential syntax structure (made from parser or from a */ |
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5 | /* pre-existing structure */ |
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6 | /* There are 2 passes, */ |
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7 | /* first pass, process named cred id, and constraint range/role/oset */ |
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8 | /* 2nd pass, process rule left / right */ |
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9 | /***********************************************************************/ |
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10 | #include <stdio.h> |
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11 | #include <assert.h> |
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12 | #include <stdlib.h> |
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13 | |
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14 | #include "abac_internal.h" |
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15 | #include "abac_set.h" |
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16 | #include "abac_util.h" |
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17 | |
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18 | #include "uthash.h" |
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19 | |
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20 | // index to generate C1,C2.. |
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21 | static int cred_count=0; |
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22 | |
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23 | static int debug=0; |
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24 | int ABAC_IN_PROLOG=0; |
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25 | |
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26 | extern int using_this; |
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27 | |
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28 | |
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29 | extern char* abac_yyfptr_encoded; |
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30 | extern int abac_yy_cnt_yy_id_certs(); |
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31 | extern void abac_yy_free_yy_id_certs(); |
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32 | extern char *abac_yy_string_yy_id_certs(); |
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33 | extern void abac_yy_free_yy_constraints(); |
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34 | extern char *abac_yy_string_yy_constraints(); |
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35 | |
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36 | /***********************************************************************/ |
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37 | char *prologIt(char *str) |
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38 | { |
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39 | char *tmp=NULL; |
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40 | asprintf(&tmp,"p%s",str); |
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41 | return tmp; |
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42 | } |
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43 | |
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44 | static char* isX() |
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45 | { |
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46 | static char x_string[2]="X"; |
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47 | static char this_string[5]="This"; |
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48 | if(using_this) |
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49 | return this_string; |
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50 | else |
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51 | return x_string; |
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52 | } |
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53 | |
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54 | static int _get_next_cred_idx() |
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55 | { |
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56 | cred_count++; |
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57 | return cred_count; |
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58 | } |
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59 | |
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60 | /* remember to free the returned string */ |
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61 | static char *_compose_cred_list() |
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62 | { |
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63 | int i=cred_count; |
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64 | if(cred_count==0) return ""; |
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65 | |
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66 | char *clist=(char *)abac_xmalloc(sizeof(char)*(cred_count)*3); |
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67 | strcpy(clist,"C1"); |
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68 | if (cred_count==1) return clist; |
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69 | |
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70 | i=1; |
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71 | while(i!=cred_count) { |
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72 | i++; |
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73 | sprintf(clist,"%s,C%d",clist,i); |
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74 | } |
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75 | return clist; |
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76 | } |
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77 | |
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78 | /***********************************************************************/ |
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79 | /* generate role(p_name, r_name, param..) */ |
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80 | /* or oset(p_name, r_name, param..) */ |
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81 | static char* generate_pl_head_string(abac_aspect_t *ptr) |
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82 | { |
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83 | char *tmp=NULL; |
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84 | char *principalname; |
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85 | PROLOG(principalname=abac_aspect_principal_name(ptr);); |
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86 | char *aspectname=abac_aspect_aspect_name(ptr); |
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87 | char *typestring=abac_aspect_type_string(ptr); |
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88 | char *param_string=NULL; |
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89 | int cnt=0; |
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90 | |
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91 | /* can not be a linked role */ |
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92 | abac_param_list_t *aspect_params=abac_aspect_aspect_params(ptr); |
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93 | if(aspect_params) { |
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94 | PROLOG(param_string=abac_param_list_string(aspect_params);); |
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95 | } |
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96 | |
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97 | if (param_string != NULL) { |
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98 | cnt=asprintf(&tmp,"%s(%s,%s,%s)", |
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99 | typestring, principalname, aspectname, param_string); |
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100 | free(param_string); |
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101 | } else { |
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102 | cnt=asprintf(&tmp,"%s(%s,%s)", |
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103 | typestring, principalname, aspectname); |
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104 | } |
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105 | |
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106 | if(debug && tmp) printf("head_string: (%s)\n",tmp); |
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107 | if(cnt>0) |
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108 | return tmp; |
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109 | else |
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110 | return NULL; |
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111 | } |
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112 | |
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113 | /* generate role(p_name, r_name, param..) with isMember call ?? */ |
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114 | /* generate oset(p_name, r_name, param..) with isMember call ?? */ |
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115 | static char* generate_pl_tail_string(abac_aspect_t *ptr) |
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116 | { |
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117 | |
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118 | char *tmp=NULL; |
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119 | |
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120 | /* for oset case, |
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121 | A.oset <- B |
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122 | A.oset <- Obj |
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123 | A.oset <- B.oset |
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124 | A.oset <- B.role.oset |
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125 | */ |
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126 | /* o only if it is an oset and object */ |
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127 | if(abac_aspect_is_object(ptr)) { |
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128 | char *objectname=abac_aspect_object_name(ptr); |
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129 | tmp=abac_xstrdup(objectname); |
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130 | if(debug && tmp) printf("tail_string1: (%s)\n",tmp); |
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131 | return tmp; |
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132 | } else { |
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133 | char *principalname; |
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134 | PROLOG(principalname=abac_aspect_principal_name(ptr);); |
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135 | char *aspectname=abac_aspect_aspect_name(ptr); |
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136 | char *linkedname=abac_aspect_linked_role_name(ptr); |
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137 | char *typestring=abac_aspect_type_string(ptr); |
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138 | |
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139 | char *param_string=NULL; |
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140 | char *linked_param_string=NULL; |
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141 | int cnt=0; |
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142 | |
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143 | abac_param_list_t *aspect_params=abac_aspect_aspect_params(ptr); |
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144 | if(aspect_params) { |
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145 | PROLOG(param_string=abac_param_list_string(aspect_params);); |
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146 | } |
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147 | |
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148 | abac_param_list_t *linked_role_params=abac_aspect_linked_role_params(ptr); |
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149 | if(linked_role_params) { |
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150 | PROLOG(linked_param_string=abac_param_list_string(linked_role_params);); |
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151 | } |
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152 | |
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153 | /* b.r.r */ |
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154 | if(linkedname!=NULL && aspectname!=NULL && principalname!=NULL ) { |
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155 | int fst=_get_next_cred_idx(); |
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156 | int snd=_get_next_cred_idx(); |
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157 | if(linked_param_string !=NULL) { |
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158 | if (param_string != NULL) { |
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159 | cnt=asprintf(&tmp,"isMember(Y,role(%s,%s,%s),C%d),isMember(%s,%s(Y,%s,%s),C%d)", |
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160 | principalname, |
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161 | linkedname,linked_param_string,fst, |
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162 | isX(), typestring, |
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163 | aspectname,param_string,snd); |
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164 | free(param_string); |
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165 | } else { |
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166 | cnt=asprintf(&tmp,"isMember(Y,role(%s,%s,%s),C%d),isMember(%s,%s(Y,%s),C%d)", |
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167 | principalname, |
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168 | linkedname,linked_param_string,fst, |
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169 | isX(), typestring, |
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170 | aspectname,snd); |
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171 | } |
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172 | free(linked_param_string); |
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173 | } else { |
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174 | if (aspect_params != NULL) { |
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175 | cnt=asprintf(&tmp,"isMember(Y,role(%s,%s),C%d),isMember(%s,%s(Y,%s,%s),C%d)", |
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176 | principalname, |
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177 | linkedname,fst, |
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178 | isX(),typestring, |
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179 | aspectname,param_string,snd); |
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180 | free(param_string); |
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181 | } else { |
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182 | cnt=asprintf(&tmp,"isMember(Y,role(%s,%s),C%d),isMember(%s,%s(Y,%s),C%d)", |
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183 | principalname, |
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184 | linkedname,fst, |
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185 | isX(),typestring, |
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186 | aspectname,snd); |
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187 | } |
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188 | } |
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189 | if(debug && tmp) printf("tail_string1: (%s)\n",tmp); |
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190 | if(cnt>0) |
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191 | return tmp; |
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192 | else |
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193 | return NULL; |
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194 | } |
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195 | /* b.r */ |
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196 | if(linkedname==NULL && aspectname!=NULL && principalname!=NULL ) { |
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197 | int fst=_get_next_cred_idx(); |
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198 | if(param_string != NULL) { |
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199 | cnt=asprintf(&tmp,"isMember(%s,%s(%s,%s,%s),C%d)", |
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200 | isX(),typestring, |
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201 | principalname, aspectname, param_string, fst); |
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202 | free(param_string); |
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203 | } else { |
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204 | cnt=asprintf(&tmp,"isMember(%s,%s(%s,%s),C%d)", |
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205 | isX(), typestring, |
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206 | principalname, aspectname, fst); |
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207 | } |
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208 | if(debug && tmp) printf("tail_string2: (%s)\n",tmp); |
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209 | if(cnt>0) |
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210 | return tmp; |
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211 | else |
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212 | return NULL; |
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213 | } |
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214 | /* b */ |
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215 | if(linkedname==NULL && aspectname==NULL && principalname!=NULL ) { |
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216 | tmp=abac_xstrdup(principalname); |
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217 | if(debug && tmp) printf("tail_string3: (%s)\n",tmp); |
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218 | return tmp; |
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219 | } |
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220 | |
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221 | if(debug && tmp) printf("tail_string4: (%s)\n",tmp); |
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222 | return tmp; |
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223 | } |
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224 | return tmp; |
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225 | } |
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226 | |
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227 | |
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228 | /********************************************************************************/ |
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229 | |
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230 | static char *_build_constraint_rule_clause(char *head_string, char *tail_string) |
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231 | { |
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232 | /*only, A.R <- B */ |
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233 | char *tmp; |
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234 | int idx=_get_next_cred_idx(); |
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235 | asprintf(&tmp, "isMember(%s,%s,C%d)", tail_string,head_string,idx); |
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236 | return tmp; |
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237 | } |
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238 | |
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239 | static char *_build_rule_clause(char *aspectname, char *head_string, |
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240 | char *tail_string, char *id_string, char *constraint_string) |
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241 | { |
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242 | char *tmp=NULL; |
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243 | |
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244 | if(aspectname == NULL) { |
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245 | /* A.R <- B */ |
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246 | if(id_string == NULL && constraint_string == NULL) { |
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247 | asprintf(&tmp, "isMember(%s,%s,['%s'])", |
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248 | tail_string,head_string,abac_yyfptr_encoded); |
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249 | } else { |
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250 | if(id_string == NULL) { |
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251 | asprintf(&tmp, "isMember(%s,%s,['%s']) :- %s", |
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252 | tail_string,head_string,abac_yyfptr_encoded, |
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253 | constraint_string); |
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254 | } else if(constraint_string == NULL) { |
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255 | asprintf(&tmp, "isMember(%s,%s,['%s']) :- %s", |
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256 | tail_string,head_string,abac_yyfptr_encoded, |
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257 | id_string); |
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258 | } else { asprintf(&tmp, "isMember(%s,%s,['%s']) :- %s,%s", |
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259 | tail_string,head_string,abac_yyfptr_encoded, |
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260 | id_string, constraint_string); |
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261 | } |
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262 | } |
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263 | } else { |
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264 | /* A.R <- B.R */ |
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265 | /* A.R <- B.R.R */ |
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266 | if (cred_count==0) { |
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267 | if(id_string == NULL && constraint_string == NULL) { |
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268 | asprintf(&tmp,"isMember(%s,%s,['%s']):-%s", |
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269 | isX(), |
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270 | head_string, abac_yyfptr_encoded, tail_string); |
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271 | } else { |
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272 | if(id_string == NULL) { |
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273 | asprintf(&tmp,"isMember(%s,%s,['%s']):-%s,%s", |
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274 | isX(), |
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275 | head_string, abac_yyfptr_encoded, tail_string, |
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276 | constraint_string); |
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277 | } else if(constraint_string == NULL) { |
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278 | asprintf(&tmp,"isMember(%s,%s,['%s']):-%s,%s", |
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279 | isX(), |
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280 | head_string, abac_yyfptr_encoded, id_string, |
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281 | tail_string); |
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282 | } else { |
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283 | asprintf(&tmp,"isMember(%s,%s,['%s']):-%s,%s,%s", |
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284 | isX(), |
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285 | head_string, abac_yyfptr_encoded, id_string, |
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286 | tail_string, constraint_string); |
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287 | } |
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288 | } |
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289 | } else { |
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290 | char *tmp_cred_list=_compose_cred_list(); |
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291 | if(id_string == NULL && constraint_string == NULL) { |
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292 | asprintf(&tmp,"isMember(%s,%s,L):-%s, appendL([['%s'],%s],L)", |
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293 | isX(), |
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294 | head_string, tail_string, |
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295 | abac_yyfptr_encoded, tmp_cred_list); |
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296 | } else { |
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297 | if(id_string == NULL) { |
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298 | asprintf(&tmp,"isMember(%s,%s,L):-%s, %s, appendL([['%s'],%s],L)", |
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299 | isX(), |
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300 | head_string, tail_string, constraint_string, |
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301 | abac_yyfptr_encoded, tmp_cred_list); |
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302 | } else if(constraint_string == NULL) { |
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303 | asprintf(&tmp,"isMember(%s,%s,L):-%s, %s, appendL([['%s'],%s],L)", |
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304 | isX(), |
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305 | head_string, id_string, tail_string, |
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306 | abac_yyfptr_encoded, tmp_cred_list); |
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307 | } else { |
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308 | asprintf(&tmp,"isMember(%s,%s,L):-%s, %s, %s, appendL([['%s'],%s],L)", |
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309 | isX(), |
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310 | head_string, id_string, tail_string, |
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311 | constraint_string, |
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312 | abac_yyfptr_encoded, tmp_cred_list); |
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313 | } |
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314 | } |
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315 | free(tmp_cred_list); |
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316 | cred_count=0; |
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317 | } |
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318 | } |
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319 | return tmp; |
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320 | } |
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321 | |
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322 | |
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323 | static char *generate_pl_rule_clause(char *head_rule_string, |
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324 | abac_aspect_t *tail_rule, char *id_string, char *constraint_string) |
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325 | { |
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326 | char *aspectname=abac_aspect_aspect_name(tail_rule); |
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327 | char *tail_rule_string=generate_pl_tail_string(tail_rule); |
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328 | if(aspectname == NULL && tail_rule_string == NULL) |
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329 | goto error; |
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330 | char *tmp=_build_rule_clause(aspectname,head_rule_string, tail_rule_string, |
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331 | id_string, constraint_string); |
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332 | if(tail_rule_string) free(tail_rule_string); |
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333 | return tmp; |
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334 | |
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335 | error: |
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336 | if(tail_rule_string) free(tail_rule_string); |
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337 | return NULL; |
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338 | } |
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339 | |
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340 | static char *_add_string(char *dstr, char *nstr) |
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341 | { |
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342 | if(strlen(dstr)==0) { |
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343 | dstr=abac_xstrdup(nstr); |
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344 | return dstr; |
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345 | } else { |
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346 | int len = strlen(dstr)+strlen(nstr)+2; |
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347 | char *tmp=abac_xmalloc(len*sizeof(char)); |
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348 | sprintf(tmp,"%s,%s", dstr,nstr); |
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349 | free(dstr); |
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350 | return tmp; |
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351 | } |
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352 | return NULL; |
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353 | } |
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354 | |
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355 | static char *_build_intersecting_clause(char *head_role_string, |
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356 | char *tail_role_string, char* id_string, char* constraint_string) |
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357 | { |
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358 | char *tmp; |
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359 | |
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360 | if (cred_count==0) { |
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361 | if(id_string == NULL && constraint_string == NULL) { |
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362 | asprintf(&tmp,"isMember(%s,%s,['%s']):-%s", |
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363 | isX(), |
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364 | head_role_string, abac_yyfptr_encoded, tail_role_string); |
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365 | } else { |
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366 | if(id_string == NULL) { |
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367 | asprintf(&tmp,"isMember(%s,%s,['%s']):-%s, %s", |
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368 | isX(), |
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369 | head_role_string, abac_yyfptr_encoded, |
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370 | tail_role_string, constraint_string); |
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371 | } else if(constraint_string == NULL) { |
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372 | asprintf(&tmp,"isMember(%s,%s,['%s']):-%s, %s", |
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373 | isX(), |
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374 | head_role_string, abac_yyfptr_encoded, |
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375 | id_string, tail_role_string); |
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376 | } else { |
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377 | asprintf(&tmp,"isMember(%s,%s,['%s']):-%s, %s, %s", |
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378 | isX(), |
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379 | head_role_string, abac_yyfptr_encoded, |
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380 | id_string, tail_role_string, constraint_string); |
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381 | } |
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382 | } |
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383 | } else { |
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384 | char *tmp_cred_list=_compose_cred_list(); |
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385 | if(id_string == NULL && constraint_string == NULL) { |
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386 | asprintf(&tmp,"isMember(%s,%s,L):-%s, appendL([['%s'],%s],L)", |
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387 | isX(), |
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388 | head_role_string, tail_role_string, |
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389 | abac_yyfptr_encoded, tmp_cred_list); |
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390 | } else { |
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391 | if(id_string == NULL) { |
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392 | asprintf(&tmp,"isMember(%s,%s,L):-%s, %s, appendL([['%s'],%s],L)", |
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393 | isX(), |
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394 | head_role_string, tail_role_string, constraint_string, |
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395 | abac_yyfptr_encoded, tmp_cred_list); |
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396 | } else if(constraint_string == NULL) { |
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397 | asprintf(&tmp,"isMember(%s,%s,L):-%s, %s, appendL([['%s'],%s],L)", |
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398 | isX(), |
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399 | head_role_string, id_string, tail_role_string, |
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400 | abac_yyfptr_encoded, tmp_cred_list); |
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401 | } else { |
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402 | asprintf(&tmp,"isMember(%s,%s,L):-%s, %s, %s, appendL([['%s'],%s],L)", |
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403 | isX(), |
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404 | head_role_string, id_string, tail_role_string, constraint_string, |
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405 | abac_yyfptr_encoded, tmp_cred_list); |
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406 | } |
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407 | } |
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408 | free(tmp_cred_list); |
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409 | cred_count=0; |
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410 | } |
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411 | return tmp; |
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412 | } |
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413 | |
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414 | static char *generate_pl_intersecting_clause(char *head_role_string, |
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415 | abac_aspect_t *tail_role, char* id_string, char* constraint_string) |
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416 | { |
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417 | char *tmp=NULL; |
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418 | char* tail_role_string=NULL; |
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419 | abac_list_t *list=abac_aspect_prereqs(tail_role); |
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420 | /* A.R <- B.R & C.R.R */ |
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421 | /* A.O <- B.O & C.R.O */ |
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422 | |
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423 | if (list != NULL) { |
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424 | abac_aspect_t *cur; |
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425 | abac_list_foreach(list, cur, |
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426 | char *ntmp=generate_pl_tail_string(cur); |
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427 | if(debug) printf(" intersecting tail: (%s)\n",ntmp); |
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428 | if(tail_role_string==NULL) { |
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429 | tail_role_string=abac_xstrdup(ntmp); |
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430 | } else { |
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431 | tmp=tail_role_string; |
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432 | tail_role_string=NULL; |
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433 | asprintf(&tail_role_string,"%s, %s",tmp,ntmp); |
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434 | free(tmp); |
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435 | } |
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436 | free(ntmp); |
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437 | ); |
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438 | } |
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439 | |
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440 | if(debug) printf(" final intersecting tail: (%s)\n",tail_role_string); |
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441 | tmp=_build_intersecting_clause(head_role_string, tail_role_string, id_string,constraint_string); |
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442 | if(tail_role_string) free(tail_role_string); |
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443 | return tmp; |
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444 | } |
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445 | |
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446 | /* generate the yap isMember rule clause for the credential stmt */ |
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447 | abac_list_t *generate_pl_clauses(abac_aspect_t *head_aspect, abac_aspect_t *tail_aspect) |
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448 | { |
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449 | char *tmp=NULL; |
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450 | char *id_clauses_string=NULL; |
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451 | char *constraint_clauses_string=NULL; |
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452 | abac_list_t *clauses=abac_list_new(); |
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453 | |
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454 | int cnt=abac_yy_cnt_yy_id_certs(); |
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455 | if(cnt > 0) { /* string it up */ |
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456 | id_clauses_string=abac_yy_string_yy_id_certs(); |
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457 | abac_yy_free_yy_id_certs(); |
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458 | } |
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459 | |
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460 | /* make a loop here */ |
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461 | cnt=abac_yy_cnt_yy_constraints(); |
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462 | if(cnt > 0) { |
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463 | constraint_clauses_string=abac_yy_string_yy_constraints(); |
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464 | abac_yy_free_yy_constraints(); |
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465 | } |
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466 | |
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467 | /* generate head's string */ |
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468 | char *head_string=generate_pl_head_string(head_aspect); |
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469 | if(head_string == NULL) |
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470 | goto error; |
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471 | |
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472 | /* tail side */ |
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473 | if(abac_aspect_is_intersection(tail_aspect)) { |
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474 | tmp=generate_pl_intersecting_clause(head_string, tail_aspect, |
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475 | id_clauses_string, constraint_clauses_string); |
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476 | } else { |
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477 | tmp=generate_pl_rule_clause(head_string, tail_aspect, |
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478 | id_clauses_string, constraint_clauses_string); |
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479 | } |
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480 | if(tmp==NULL) |
---|
481 | goto error; |
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482 | |
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483 | abac_list_add(clauses,tmp); |
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484 | return clauses; |
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485 | |
---|
486 | error: |
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487 | if(head_string) free(head_string); |
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488 | if(id_clauses_string) free(id_clauses_string); |
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489 | if(constraint_clauses_string) free(constraint_clauses_string); |
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490 | return clauses; |
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491 | } |
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492 | |
---|
493 | /* should be just 1 */ |
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494 | char *generate_pl_constraint_clause(abac_aspect_t *head_aspect, char *tail_string) |
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495 | { |
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496 | /* generate head's role or oset string */ |
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497 | char *head_string=generate_pl_head_string(head_aspect); |
---|
498 | if(head_string == NULL) |
---|
499 | goto error; |
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500 | |
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501 | /* tail side */ |
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502 | char *tmp=_build_constraint_rule_clause(head_string, tail_string); |
---|
503 | if(tmp==NULL) |
---|
504 | goto error; |
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505 | |
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506 | return tmp; |
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507 | |
---|
508 | error: |
---|
509 | if(head_string) free(head_string); |
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510 | return NULL; |
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511 | } |
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512 | |
---|
513 | /* integer(X)<10 */ |
---|
514 | /* X='abc' */ |
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515 | char *generate_pl_range_constraint(char *typestr,char *var,char *val,char *op) |
---|
516 | { |
---|
517 | char *tmp=NULL; |
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518 | if(typestr) |
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519 | asprintf(&tmp,"%s(%s)%s%s",typestr,var,op,val); |
---|
520 | else |
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521 | asprintf(&tmp,"%s%s%s",var,op,val); |
---|
522 | return tmp; |
---|
523 | } |
---|
524 | |
---|
525 | /* compare(op,var,val) */ |
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526 | char *generate_pl_range_time_constraint(char *var,char *val,char *op) |
---|
527 | { |
---|
528 | char *tmp=NULL; |
---|
529 | asprintf(&tmp,"compare(%s,%s,%s)",op,var,val); |
---|
530 | return tmp; |
---|
531 | } |
---|
532 | |
---|
533 | /* generate the yap isType rule clause for the type, |
---|
534 | isType(Acme, keyid); */ |
---|
535 | char *generate_pl_type_clause(char *principalname, int type) |
---|
536 | { |
---|
537 | char *tmp=NULL; |
---|
538 | char *typeid= abac_idtype_string(type); |
---|
539 | if(typeid==NULL || strcmp(typeid,"NULL")==0) |
---|
540 | panic("generate_pl_type_clause: can not have null typeid"); |
---|
541 | int cnt=asprintf(&tmp,"isType(%s,%s)", |
---|
542 | principalname, typeid); |
---|
543 | return tmp; |
---|
544 | } |
---|
545 | |
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