[440ba20] | 1 | |
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| 2 | /***********************************************************************/ |
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| 3 | /* abac_pl_pre.c */ |
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[abf8d5d] | 4 | /* clause preprocesing called to make partial prolog clause generations*/ |
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[440ba20] | 5 | /* -> process named cred id, and constraint range/role/oset */ |
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| 6 | /***********************************************************************/ |
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| 7 | #include <stdio.h> |
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| 8 | #include <assert.h> |
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| 9 | #include <stdlib.h> |
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| 10 | |
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| 11 | #include "abac_util.h" |
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| 12 | |
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[2e9455f] | 13 | #include "abac_pl_pre.h" |
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| 14 | #include "abac_term.h" |
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| 15 | #include "abac_aspect.h" |
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| 16 | #include "abac_list.h" |
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| 17 | #include "abac_pl_gen.h" |
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| 18 | #include "abac_pl_yap.h" |
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[440ba20] | 19 | |
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| 20 | static int debug=0; |
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| 21 | |
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| 22 | /****************************************************************/ |
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| 23 | /* add the range condition to constraint list */ |
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| 24 | /* this is for integer and float only */ |
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| 25 | static void _preprocess_range_numeric_constraint(abac_term_t *ptr) |
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| 26 | { |
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| 27 | assert(abac_term_constraint(ptr)); |
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| 28 | char *var=abac_term_name(ptr); |
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| 29 | char *typestr=abac_term_type_name(ptr); |
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| 30 | abac_condition_t *cond=abac_term_constraint(ptr); |
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| 31 | |
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| 32 | char *tmplist=NULL; |
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| 33 | char *tmp=NULL; |
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| 34 | int as_range=1; /* either , or ; */ |
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| 35 | |
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| 36 | abac_condition_set_range_string(cond); |
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| 37 | |
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| 38 | abac_list_t *rlist=abac_condition_range_list(cond); |
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| 39 | abac_item_t *cur; |
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| 40 | abac_list_foreach(rlist, cur, |
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| 41 | int type=abac_item_type(cur); |
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| 42 | char *val=abac_item_val(cur); |
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| 43 | switch(type) { |
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| 44 | case e_ITEM_MIN: |
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| 45 | tmp=generate_pl_range_constraint(typestr,var,val,">="); |
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| 46 | break; |
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| 47 | case e_ITEM_MAX: |
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| 48 | tmp=generate_pl_range_constraint(typestr,var,val,"=<"); |
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| 49 | break; |
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| 50 | case e_ITEM_TARGET: |
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| 51 | tmp=generate_pl_range_constraint(NULL,var,val,"="); |
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| 52 | as_range=0; |
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| 53 | break; |
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| 54 | } |
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| 55 | /* ; is prolog's disjunction built in predicate */ |
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| 56 | if(tmplist) { |
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| 57 | if(as_range) |
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| 58 | asprintf(&tmplist,"%s,%s",tmplist,tmp); |
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| 59 | else |
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| 60 | asprintf(&tmplist,"%s;%s",tmplist,tmp); |
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| 61 | } else { |
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| 62 | tmplist=tmp; |
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| 63 | } |
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| 64 | tmp=NULL; |
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| 65 | ); |
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| 66 | asprintf(&tmplist,"(%s)",tmplist); |
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| 67 | abac_pl_add_constraints(tmplist); |
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| 68 | } |
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| 69 | |
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| 70 | /****************************************************************/ |
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| 71 | /* this is for time only */ |
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| 72 | static void _preprocess_range_time_constraint(abac_term_t *ptr) |
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| 73 | { |
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| 74 | assert(abac_term_constraint(ptr)); |
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| 75 | char *var=abac_term_name(ptr); |
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| 76 | char *typestr=abac_term_type_name(ptr); |
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| 77 | abac_condition_t *cond=abac_term_constraint(ptr); |
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| 78 | abac_list_t *rlist=abac_condition_range_list(cond); |
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| 79 | assert(rlist); |
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| 80 | |
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| 81 | char *tmplist=NULL; |
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| 82 | char *tmp=NULL; |
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| 83 | char *ttmp=NULL; |
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| 84 | char *tlist=NULL; |
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| 85 | int as_range=1; /* either , or ; */ |
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| 86 | |
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| 87 | abac_condition_set_range_string(cond); |
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| 88 | |
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| 89 | abac_item_t *cur; |
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| 90 | /* a list of values -- in chars */ |
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| 91 | abac_list_foreach(rlist, cur, |
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| 92 | int type=abac_item_type(cur); |
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| 93 | char *tval=abac_item_val(cur); |
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| 94 | char *val=abac_term_to_time(tval); |
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| 95 | switch(type) { |
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| 96 | case e_ITEM_MIN: |
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| 97 | ttmp=generate_pl_range_time_constraint(var,val,">"); |
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| 98 | tmp=generate_pl_range_time_constraint(var,val,"="); |
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| 99 | asprintf(&tlist,"(%s;%s)",ttmp,tmp); |
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| 100 | tmp=tlist; |
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| 101 | break; |
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| 102 | case e_ITEM_MAX: |
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| 103 | ttmp=generate_pl_range_time_constraint(var,val,"="); |
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| 104 | tmp=generate_pl_range_time_constraint(var,val,"<"); |
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| 105 | asprintf(&tlist,"(%s;%s)",ttmp,tmp); |
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| 106 | tmp=tlist; |
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| 107 | break; |
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| 108 | case e_ITEM_TARGET: |
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| 109 | tmp=generate_pl_range_time_constraint(var,val,"="); |
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| 110 | as_range=0; |
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| 111 | break; |
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| 112 | } |
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| 113 | free(val); |
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| 114 | /* ; is prolog's disjunction built in predicate */ |
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| 115 | if(tmplist) { |
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| 116 | if(as_range) |
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| 117 | asprintf(&tmplist,"%s,%s",tmplist,tmp); |
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| 118 | else |
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| 119 | asprintf(&tmplist,"%s;%s",tmplist,tmp); |
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| 120 | } else { |
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| 121 | tmplist=tmp; |
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| 122 | } |
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| 123 | tmp=NULL; |
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| 124 | ); |
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| 125 | |
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| 126 | asprintf(&tmplist,"(%s)",tmplist); |
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| 127 | |
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| 128 | /* generate a clause with above and add into db */ |
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| 129 | tmp=abac_pl_add_range_constraint_clause(var,tmplist); |
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| 130 | abac_pl_add_constraints(tmp); |
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| 131 | } |
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| 132 | |
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| 133 | /****************************************************************/ |
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| 134 | /* this is for string and urn only */ |
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| 135 | static void _preprocess_range_string_constraint(abac_term_t *ptr) |
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| 136 | { |
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| 137 | assert(abac_term_constraint(ptr)); |
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| 138 | char *var=abac_term_name(ptr); |
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| 139 | char *typestr=abac_term_type_name(ptr); |
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| 140 | abac_condition_t *cond=abac_term_constraint(ptr); |
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| 141 | abac_list_t *rlist=abac_condition_range_list(cond); |
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| 142 | assert(rlist); |
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| 143 | |
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| 144 | char *tmplist=NULL; |
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| 145 | char *tmp=NULL; |
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| 146 | |
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| 147 | abac_condition_set_range_string(cond); |
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| 148 | abac_item_t *cur; |
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| 149 | |
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| 150 | /* a list of values -- in chars */ |
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| 151 | abac_list_foreach(rlist, cur, |
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| 152 | int type=abac_item_type(cur); |
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| 153 | char *val=abac_item_val(cur); |
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| 154 | switch(type) { |
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| 155 | case e_ITEM_MIN: |
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| 156 | panic("_preprocess_range_string_constraint, invalid range type - min"); |
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| 157 | break; |
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| 158 | case e_ITEM_MAX: |
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| 159 | /* invalid range type */ |
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| 160 | panic("_preprocess_range_string_constraint, invalid range type - max"); |
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| 161 | break; |
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| 162 | case e_ITEM_TARGET: |
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| 163 | tmp=generate_pl_range_constraint(NULL,var,val,"="); |
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| 164 | break; |
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| 165 | } |
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| 166 | /* ; is prolog's disjunction built in predicate */ |
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| 167 | if(tmplist) |
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| 168 | asprintf(&tmplist,"%s;%s",tmplist,tmp); |
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| 169 | else tmplist=tmp; |
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| 170 | tmp=NULL; |
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| 171 | ); |
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| 172 | asprintf(&tmplist,"(%s)",tmplist); |
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| 173 | /* generate a clause with above and add into db */ |
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| 174 | tmp=abac_pl_add_range_constraint_clause(var,tmplist); |
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| 175 | abac_pl_add_constraints(tmp); |
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| 176 | } |
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| 177 | |
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| 178 | |
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| 179 | /***********************************************************************/ |
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[2e9455f] | 180 | void preprocess_pl_term(abac_context_t *ctxt,abac_term_t *ptr) |
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[440ba20] | 181 | { |
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| 182 | /* add id */ |
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| 183 | char *name=abac_term_name(ptr); |
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| 184 | char *type=abac_term_type_name(ptr); |
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| 185 | |
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| 186 | if(abac_term_type(ptr) == e_TERM_PRINCIPAL && abac_term_isnamed(ptr)) { |
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| 187 | int type=e_KEYID; |
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| 188 | abac_pl_add_id_certs(name,type); |
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[b92a620] | 189 | if(debug) fprintf(stderr,"preprocess_pl_term: adding %s to id_certs\n",name); |
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[440ba20] | 190 | } |
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| 191 | |
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| 192 | abac_condition_t *cond=abac_term_constraint(ptr); |
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| 193 | if(cond != NULL) { |
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| 194 | if(abac_condition_is_range(cond)) { |
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| 195 | if(abac_term_is_numeric(ptr)) { |
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| 196 | _preprocess_range_numeric_constraint(ptr); |
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| 197 | } else if (abac_term_is_alpha(ptr)) { |
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| 198 | _preprocess_range_string_constraint(ptr); |
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| 199 | } else if (abac_term_is_time(ptr)) { |
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| 200 | _preprocess_range_time_constraint(ptr); |
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| 201 | } |
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| 202 | } else { |
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[2e9455f] | 203 | /* special handling of role/oset constraining condition */ |
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[b92a620] | 204 | if(debug) fprintf(stderr,"expecting either oset/role constraint with %s\n",name); |
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[440ba20] | 205 | abac_aspect_t *cptr=abac_condition_of_aspect(cond); |
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[2e9455f] | 206 | preprocess_pl_head(ctxt,cptr); |
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| 207 | |
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[abf8d5d] | 208 | /* generate the prolog clause */ |
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[2e9455f] | 209 | char *tmp=generate_pl_constraint_clause(ctxt,cptr,name); |
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[440ba20] | 210 | abac_condition_set_aspect_string(cond,tmp); |
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| 211 | abac_pl_add_constraints(tmp); |
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| 212 | } |
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| 213 | } |
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| 214 | } |
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| 215 | |
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[2e9455f] | 216 | void preprocess_pl_params(abac_context_t *ctxt,abac_param_list_t *ptr) |
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[440ba20] | 217 | { |
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| 218 | abac_list_t *list=abac_param_list(ptr); |
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| 219 | assert(list); |
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| 220 | abac_term_t *cur; |
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| 221 | abac_list_foreach(list, cur, |
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[2e9455f] | 222 | preprocess_pl_term(ctxt,cur); |
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[440ba20] | 223 | ); |
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| 224 | } |
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| 225 | |
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[2e9455f] | 226 | void preprocess_pl_head(abac_context_t *ctxt,abac_aspect_t *ptr) |
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[440ba20] | 227 | { |
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| 228 | char *principalname; |
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| 229 | PROLOG(principalname=abac_aspect_principal_name(ptr);); |
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| 230 | int idtype=abac_aspect_get_issuer_idtype(ptr); |
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| 231 | abac_pl_add_id_certs(principalname,idtype); |
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| 232 | if(debug) |
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[b92a620] | 233 | fprintf(stderr,"preprocess_pl_head: adding %s to id_certs\n",principalname); |
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[440ba20] | 234 | |
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| 235 | abac_param_list_t *aspect_params=abac_aspect_aspect_params(ptr); |
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| 236 | if(aspect_params) { |
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[2e9455f] | 237 | preprocess_pl_params(ctxt,aspect_params); |
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| 238 | } |
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| 239 | abac_param_list_t *linked_role_params=abac_aspect_linked_role_params(ptr); |
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| 240 | if(linked_role_params) { |
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| 241 | preprocess_pl_params(ctxt,linked_role_params); |
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[440ba20] | 242 | } |
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| 243 | |
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| 244 | } |
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| 245 | |
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[2e9455f] | 246 | void preprocess_pl_tail(abac_context_t *ctxt,abac_aspect_t *ptr) |
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[440ba20] | 247 | { |
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| 248 | /* if it is an intersection, preprocess each one */ |
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| 249 | |
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| 250 | abac_list_t *list=abac_aspect_prereqs(ptr); |
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| 251 | if(list != 0) { |
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| 252 | abac_aspect_t *cur; |
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| 253 | abac_list_foreach(list, cur, |
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| 254 | if(cur) |
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[2e9455f] | 255 | preprocess_pl_tail(ctxt,cur); |
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[440ba20] | 256 | ); |
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| 257 | return; |
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| 258 | } |
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| 259 | |
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| 260 | /* for oset case, |
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| 261 | A.oset <- B |
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| 262 | A.oset <- Obj |
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| 263 | A.oset <- B.oset |
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| 264 | A.oset <- B.role.oset |
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| 265 | */ |
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| 266 | /* if it is an oset and object */ |
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| 267 | if(abac_aspect_is_object(ptr)) { |
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| 268 | abac_term_t *tptr=abac_aspect_object_term(ptr); |
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| 269 | if(tptr) |
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[2e9455f] | 270 | preprocess_pl_term(ctxt,tptr); |
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[440ba20] | 271 | } else { |
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| 272 | char *principalname; |
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| 273 | PROLOG(principalname=abac_aspect_principal_name(ptr);); |
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| 274 | int idtype=abac_aspect_get_issuer_idtype(ptr); |
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| 275 | abac_pl_add_id_certs(principalname,idtype); |
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| 276 | if(debug) |
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[b92a620] | 277 | fprintf(stderr,"preprocess_pl_tail: adding %s to id_certs\n",principalname); |
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[440ba20] | 278 | abac_param_list_t *aspect_params=abac_aspect_aspect_params(ptr); |
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| 279 | if(aspect_params) { |
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[2e9455f] | 280 | preprocess_pl_params(ctxt,aspect_params); |
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[440ba20] | 281 | } |
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| 282 | |
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| 283 | abac_param_list_t *linked_role_params=abac_aspect_linked_role_params(ptr); |
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| 284 | if(linked_role_params) { |
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[2e9455f] | 285 | preprocess_pl_params(ctxt,linked_role_params); |
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[440ba20] | 286 | } |
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| 287 | } |
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| 288 | } |
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| 289 | |
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| 290 | |
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| 291 | |
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