[440ba20] | 1 | |
---|
| 2 | /***********************************************************************/ |
---|
| 3 | /* abac_pl_pre.c */ |
---|
| 4 | /* clause preprocesing called to partial yap clause generations */ |
---|
| 5 | /* -> process named cred id, and constraint range/role/oset */ |
---|
| 6 | /***********************************************************************/ |
---|
| 7 | #include <stdio.h> |
---|
| 8 | #include <assert.h> |
---|
| 9 | #include <stdlib.h> |
---|
| 10 | |
---|
| 11 | #include "abac_internal.h" |
---|
| 12 | #include "abac_util.h" |
---|
| 13 | #include "abac_list.h" |
---|
| 14 | |
---|
| 15 | #include "uthash.h" |
---|
| 16 | |
---|
| 17 | static int debug=0; |
---|
| 18 | |
---|
| 19 | extern char *abac_pl_add_range_constraint_clause(char *var, char *tmplist); |
---|
| 20 | extern char *generate_pl_range_constraint(char *,char *,char *,char *); |
---|
| 21 | extern char *generate_pl_range_time_constraint(char *,char *,char *); |
---|
| 22 | extern char* generate_pl_constraint_clause(abac_aspect_t *, char *); |
---|
| 23 | |
---|
| 24 | void preprocess_pl_head(abac_aspect_t *ptr); |
---|
| 25 | |
---|
| 26 | /****************************************************************/ |
---|
| 27 | /* add the range condition to constraint list */ |
---|
| 28 | /* this is for integer and float only */ |
---|
| 29 | static void _preprocess_range_numeric_constraint(abac_term_t *ptr) |
---|
| 30 | { |
---|
| 31 | assert(abac_term_constraint(ptr)); |
---|
| 32 | char *var=abac_term_name(ptr); |
---|
| 33 | char *typestr=abac_term_type_name(ptr); |
---|
| 34 | abac_condition_t *cond=abac_term_constraint(ptr); |
---|
| 35 | |
---|
| 36 | if(debug) printf("in _preprocess_range_numeric_constraint\n"); |
---|
| 37 | |
---|
| 38 | char *tmplist=NULL; |
---|
| 39 | char *tmp=NULL; |
---|
| 40 | int as_range=1; /* either , or ; */ |
---|
| 41 | |
---|
| 42 | abac_condition_set_range_string(cond); |
---|
| 43 | |
---|
| 44 | abac_list_t *rlist=abac_condition_range_list(cond); |
---|
| 45 | abac_item_t *cur; |
---|
| 46 | abac_list_foreach(rlist, cur, |
---|
| 47 | int type=abac_item_type(cur); |
---|
| 48 | char *val=abac_item_val(cur); |
---|
| 49 | switch(type) { |
---|
| 50 | case e_ITEM_MIN: |
---|
| 51 | tmp=generate_pl_range_constraint(typestr,var,val,">="); |
---|
| 52 | break; |
---|
| 53 | case e_ITEM_MAX: |
---|
| 54 | tmp=generate_pl_range_constraint(typestr,var,val,"=<"); |
---|
| 55 | break; |
---|
| 56 | case e_ITEM_TARGET: |
---|
| 57 | tmp=generate_pl_range_constraint(NULL,var,val,"="); |
---|
| 58 | as_range=0; |
---|
| 59 | break; |
---|
| 60 | } |
---|
| 61 | /* ; is prolog's disjunction built in predicate */ |
---|
| 62 | if(tmplist) { |
---|
| 63 | if(as_range) |
---|
| 64 | asprintf(&tmplist,"%s,%s",tmplist,tmp); |
---|
| 65 | else |
---|
| 66 | asprintf(&tmplist,"%s;%s",tmplist,tmp); |
---|
| 67 | } else { |
---|
| 68 | tmplist=tmp; |
---|
| 69 | } |
---|
| 70 | tmp=NULL; |
---|
| 71 | ); |
---|
| 72 | asprintf(&tmplist,"(%s)",tmplist); |
---|
| 73 | abac_pl_add_constraints(tmplist); |
---|
| 74 | } |
---|
| 75 | |
---|
| 76 | /****************************************************************/ |
---|
| 77 | /* this is for time only */ |
---|
| 78 | static void _preprocess_range_time_constraint(abac_term_t *ptr) |
---|
| 79 | { |
---|
| 80 | assert(abac_term_constraint(ptr)); |
---|
| 81 | char *var=abac_term_name(ptr); |
---|
| 82 | char *typestr=abac_term_type_name(ptr); |
---|
| 83 | abac_condition_t *cond=abac_term_constraint(ptr); |
---|
| 84 | abac_list_t *rlist=abac_condition_range_list(cond); |
---|
| 85 | assert(rlist); |
---|
| 86 | |
---|
| 87 | if(debug) printf("in _preprocess_range_time_constraint\n"); |
---|
| 88 | |
---|
| 89 | char *tmplist=NULL; |
---|
| 90 | char *tmp=NULL; |
---|
| 91 | char *ttmp=NULL; |
---|
| 92 | char *tlist=NULL; |
---|
| 93 | int as_range=1; /* either , or ; */ |
---|
| 94 | |
---|
| 95 | abac_condition_set_range_string(cond); |
---|
| 96 | |
---|
| 97 | abac_item_t *cur; |
---|
| 98 | /* a list of values -- in chars */ |
---|
| 99 | abac_list_foreach(rlist, cur, |
---|
| 100 | int type=abac_item_type(cur); |
---|
| 101 | char *tval=abac_item_val(cur); |
---|
| 102 | char *val=abac_term_to_time(tval); |
---|
| 103 | switch(type) { |
---|
| 104 | case e_ITEM_MIN: |
---|
| 105 | ttmp=generate_pl_range_time_constraint(var,val,">"); |
---|
| 106 | tmp=generate_pl_range_time_constraint(var,val,"="); |
---|
| 107 | asprintf(&tlist,"(%s;%s)",ttmp,tmp); |
---|
| 108 | tmp=tlist; |
---|
| 109 | break; |
---|
| 110 | case e_ITEM_MAX: |
---|
| 111 | ttmp=generate_pl_range_time_constraint(var,val,"="); |
---|
| 112 | tmp=generate_pl_range_time_constraint(var,val,"<"); |
---|
| 113 | asprintf(&tlist,"(%s;%s)",ttmp,tmp); |
---|
| 114 | tmp=tlist; |
---|
| 115 | break; |
---|
| 116 | case e_ITEM_TARGET: |
---|
| 117 | tmp=generate_pl_range_time_constraint(var,val,"="); |
---|
| 118 | as_range=0; |
---|
| 119 | break; |
---|
| 120 | } |
---|
| 121 | free(val); |
---|
| 122 | /* ; is prolog's disjunction built in predicate */ |
---|
| 123 | if(tmplist) { |
---|
| 124 | if(as_range) |
---|
| 125 | asprintf(&tmplist,"%s,%s",tmplist,tmp); |
---|
| 126 | else |
---|
| 127 | asprintf(&tmplist,"%s;%s",tmplist,tmp); |
---|
| 128 | } else { |
---|
| 129 | tmplist=tmp; |
---|
| 130 | } |
---|
| 131 | tmp=NULL; |
---|
| 132 | ); |
---|
| 133 | |
---|
| 134 | asprintf(&tmplist,"(%s)",tmplist); |
---|
| 135 | |
---|
| 136 | /* generate a clause with above and add into db */ |
---|
| 137 | tmp=abac_pl_add_range_constraint_clause(var,tmplist); |
---|
| 138 | abac_pl_add_constraints(tmp); |
---|
| 139 | } |
---|
| 140 | |
---|
| 141 | /****************************************************************/ |
---|
| 142 | /* this is for string and urn only */ |
---|
| 143 | static void _preprocess_range_string_constraint(abac_term_t *ptr) |
---|
| 144 | { |
---|
| 145 | assert(abac_term_constraint(ptr)); |
---|
| 146 | char *var=abac_term_name(ptr); |
---|
| 147 | char *typestr=abac_term_type_name(ptr); |
---|
| 148 | abac_condition_t *cond=abac_term_constraint(ptr); |
---|
| 149 | abac_list_t *rlist=abac_condition_range_list(cond); |
---|
| 150 | assert(rlist); |
---|
| 151 | |
---|
| 152 | char *tmplist=NULL; |
---|
| 153 | char *tmp=NULL; |
---|
| 154 | |
---|
| 155 | if(debug) printf("in _preprocess_range_string_constraint\n"); |
---|
| 156 | |
---|
| 157 | abac_condition_set_range_string(cond); |
---|
| 158 | abac_item_t *cur; |
---|
| 159 | |
---|
| 160 | /* a list of values -- in chars */ |
---|
| 161 | abac_list_foreach(rlist, cur, |
---|
| 162 | int type=abac_item_type(cur); |
---|
| 163 | char *val=abac_item_val(cur); |
---|
| 164 | switch(type) { |
---|
| 165 | case e_ITEM_MIN: |
---|
| 166 | panic("_preprocess_range_string_constraint, invalid range type - min"); |
---|
| 167 | break; |
---|
| 168 | case e_ITEM_MAX: |
---|
| 169 | /* invalid range type */ |
---|
| 170 | panic("_preprocess_range_string_constraint, invalid range type - max"); |
---|
| 171 | break; |
---|
| 172 | case e_ITEM_TARGET: |
---|
| 173 | tmp=generate_pl_range_constraint(NULL,var,val,"="); |
---|
| 174 | break; |
---|
| 175 | } |
---|
| 176 | /* ; is prolog's disjunction built in predicate */ |
---|
| 177 | if(tmplist) |
---|
| 178 | asprintf(&tmplist,"%s;%s",tmplist,tmp); |
---|
| 179 | else tmplist=tmp; |
---|
| 180 | tmp=NULL; |
---|
| 181 | ); |
---|
| 182 | asprintf(&tmplist,"(%s)",tmplist); |
---|
| 183 | /* generate a clause with above and add into db */ |
---|
| 184 | tmp=abac_pl_add_range_constraint_clause(var,tmplist); |
---|
| 185 | abac_pl_add_constraints(tmp); |
---|
| 186 | } |
---|
| 187 | |
---|
| 188 | |
---|
| 189 | /***********************************************************************/ |
---|
| 190 | void preprocess_pl_term(abac_term_t *ptr) |
---|
| 191 | { |
---|
| 192 | /* add id */ |
---|
| 193 | char *name=abac_term_name(ptr); |
---|
| 194 | char *type=abac_term_type_name(ptr); |
---|
| 195 | |
---|
| 196 | if(abac_term_type(ptr) == e_TERM_PRINCIPAL && abac_term_isnamed(ptr)) { |
---|
| 197 | int type=e_KEYID; |
---|
| 198 | abac_pl_add_id_certs(name,type); |
---|
| 199 | if(debug) printf("preprocess_pl_term: adding %s to id_certs\n",name); |
---|
| 200 | } |
---|
| 201 | |
---|
| 202 | abac_condition_t *cond=abac_term_constraint(ptr); |
---|
| 203 | if(cond != NULL) { |
---|
| 204 | if(abac_condition_is_range(cond)) { |
---|
| 205 | if(abac_term_is_numeric(ptr)) { |
---|
| 206 | _preprocess_range_numeric_constraint(ptr); |
---|
| 207 | } else if (abac_term_is_alpha(ptr)) { |
---|
| 208 | _preprocess_range_string_constraint(ptr); |
---|
| 209 | } else if (abac_term_is_time(ptr)) { |
---|
| 210 | _preprocess_range_time_constraint(ptr); |
---|
| 211 | } |
---|
| 212 | } else { |
---|
| 213 | if(debug) printf("expecting either oset/role constraint with %s\n",name); |
---|
| 214 | abac_aspect_t *cptr=abac_condition_of_aspect(cond); |
---|
| 215 | preprocess_pl_head(cptr); |
---|
| 216 | /* generate the yap clause */ |
---|
| 217 | char *tmp=generate_pl_constraint_clause(cptr,name); |
---|
| 218 | abac_condition_set_aspect_string(cond,tmp); |
---|
| 219 | abac_pl_add_constraints(tmp); |
---|
| 220 | } |
---|
| 221 | } |
---|
| 222 | } |
---|
| 223 | |
---|
| 224 | void preprocess_pl_params(abac_param_list_t *ptr) |
---|
| 225 | { |
---|
| 226 | abac_list_t *list=abac_param_list(ptr); |
---|
| 227 | assert(list); |
---|
| 228 | abac_term_t *cur; |
---|
| 229 | abac_list_foreach(list, cur, |
---|
| 230 | preprocess_pl_term(cur); |
---|
| 231 | ); |
---|
| 232 | } |
---|
| 233 | |
---|
| 234 | void preprocess_pl_head(abac_aspect_t *ptr) |
---|
| 235 | { |
---|
| 236 | char *principalname; |
---|
| 237 | PROLOG(principalname=abac_aspect_principal_name(ptr);); |
---|
| 238 | int idtype=abac_aspect_get_issuer_idtype(ptr); |
---|
| 239 | abac_pl_add_id_certs(principalname,idtype); |
---|
| 240 | if(debug) |
---|
| 241 | printf("preprocess_pl_head: adding %s to id_certs\n",principalname); |
---|
| 242 | |
---|
| 243 | abac_param_list_t *aspect_params=abac_aspect_aspect_params(ptr); |
---|
| 244 | if(aspect_params) { |
---|
| 245 | preprocess_pl_params(aspect_params); |
---|
| 246 | } |
---|
| 247 | |
---|
| 248 | } |
---|
| 249 | |
---|
| 250 | void preprocess_pl_tail(abac_aspect_t *ptr) |
---|
| 251 | { |
---|
| 252 | /* if it is an intersection, preprocess each one */ |
---|
| 253 | |
---|
| 254 | abac_list_t *list=abac_aspect_prereqs(ptr); |
---|
| 255 | if(list != 0) { |
---|
| 256 | abac_aspect_t *cur; |
---|
| 257 | abac_list_foreach(list, cur, |
---|
| 258 | if(cur) |
---|
| 259 | preprocess_pl_tail(cur); |
---|
| 260 | ); |
---|
| 261 | return; |
---|
| 262 | } |
---|
| 263 | |
---|
| 264 | /* for oset case, |
---|
| 265 | A.oset <- B |
---|
| 266 | A.oset <- Obj |
---|
| 267 | A.oset <- B.oset |
---|
| 268 | A.oset <- B.role.oset |
---|
| 269 | */ |
---|
| 270 | /* if it is an oset and object */ |
---|
| 271 | if(abac_aspect_is_object(ptr)) { |
---|
| 272 | abac_term_t *tptr=abac_aspect_object_term(ptr); |
---|
| 273 | if(tptr) |
---|
| 274 | preprocess_pl_term(tptr); |
---|
| 275 | } else { |
---|
| 276 | char *principalname; |
---|
| 277 | PROLOG(principalname=abac_aspect_principal_name(ptr);); |
---|
| 278 | int idtype=abac_aspect_get_issuer_idtype(ptr); |
---|
| 279 | abac_pl_add_id_certs(principalname,idtype); |
---|
| 280 | if(debug) |
---|
| 281 | printf("preprocess_pl_tail: adding %s to id_certs\n",principalname); |
---|
| 282 | abac_param_list_t *aspect_params=abac_aspect_aspect_params(ptr); |
---|
| 283 | if(aspect_params) { |
---|
| 284 | preprocess_pl_params(aspect_params); |
---|
| 285 | } |
---|
| 286 | |
---|
| 287 | abac_param_list_t *linked_role_params=abac_aspect_linked_role_params(ptr); |
---|
| 288 | if(linked_role_params) { |
---|
| 289 | preprocess_pl_params(linked_role_params); |
---|
| 290 | } |
---|
| 291 | } |
---|
| 292 | } |
---|
| 293 | |
---|
| 294 | |
---|
| 295 | |
---|