[e95d652] | 1 | |
---|
| 2 | /* copied from abac_graph.c |
---|
| 3 | implementation of the low level using |
---|
| 4 | yap prolog |
---|
| 5 | */ |
---|
| 6 | |
---|
| 7 | #include <err.h> |
---|
| 8 | #include <stdio.h> |
---|
| 9 | #include <assert.h> |
---|
| 10 | #include <stdlib.h> |
---|
| 11 | #include <string.h> |
---|
| 12 | #include <Yap/YapInterface.h> |
---|
| 13 | |
---|
| 14 | #include "abac_pl.h" |
---|
| 15 | #include "abac_pl_yap.h" |
---|
| 16 | |
---|
| 17 | #include "abac_list.h" |
---|
| 18 | #include "abac_util.h" |
---|
| 19 | |
---|
| 20 | #include "uthash.h" |
---|
| 21 | |
---|
| 22 | extern char *abac_cn_with_role(abac_role_t *); |
---|
[da5afdf] | 23 | extern char *abac_cn_with_oset(abac_oset_t *); |
---|
| 24 | extern abac_list_t *abac_credential_clauses(abac_credential_t *); |
---|
| 25 | extern char *abac_id_clause(abac_id_cert_t *); |
---|
| 26 | |
---|
[202a7f9] | 27 | static int debug=0; |
---|
[e95d652] | 28 | |
---|
[da5afdf] | 29 | // pl -- place holder for now |
---|
[e95d652] | 30 | struct _abac_pl_t { |
---|
| 31 | FILE *fptr; |
---|
| 32 | char *fname; |
---|
| 33 | char *yap_certs; |
---|
| 34 | }; |
---|
| 35 | |
---|
[53e540d] | 36 | static int _insert_clause(char *str) |
---|
[e95d652] | 37 | { |
---|
[202a7f9] | 38 | YAP_Term *eterm; |
---|
[53e540d] | 39 | YAP_Term goalArgs=YAP_ReadBuffer(str, eterm); |
---|
| 40 | char *tmp=YAP_CompileClause(goalArgs); |
---|
| 41 | if (tmp!=NULL) { /* something is wrong */ |
---|
| 42 | printf("error: result of compile clause (%s)\n", tmp); |
---|
| 43 | printf("error: str used (%s)\n", str); |
---|
| 44 | return 1; |
---|
[e95d652] | 45 | } |
---|
[53e540d] | 46 | return 0; |
---|
[e95d652] | 47 | } |
---|
| 48 | |
---|
[53e540d] | 49 | static int _insert_cred_clause(char *cstr) |
---|
[e95d652] | 50 | { |
---|
| 51 | int ret=ABAC_CERT_SUCCESS; |
---|
[53e540d] | 52 | int rc=_insert_clause(cstr); |
---|
| 53 | if (rc) |
---|
| 54 | return ABAC_CERT_BAD_YAP; |
---|
| 55 | return ABAC_CERT_SUCCESS; |
---|
[e95d652] | 56 | } |
---|
| 57 | |
---|
| 58 | static void _show_yap_db(char *msg) |
---|
| 59 | { |
---|
| 60 | char lstr[]="listing"; |
---|
[da5afdf] | 61 | YAP_Term *eterm; /* error term */ |
---|
[e95d652] | 62 | |
---|
[53e540d] | 63 | printf("\n\n========= yap db (%s)\n",msg); |
---|
[e95d652] | 64 | YAP_Term goal=YAP_ReadBuffer(lstr, eterm); |
---|
| 65 | int rc =YAP_RunGoal( goal ); |
---|
| 66 | if (rc) { |
---|
| 67 | printf("listing ok.. \n"); |
---|
| 68 | } else { |
---|
| 69 | printf("listing's rc is bad.. \n"); |
---|
| 70 | YAP_Exit(1); |
---|
| 71 | } |
---|
[53e540d] | 72 | printf("========= \n\n"); |
---|
[e95d652] | 73 | } |
---|
| 74 | |
---|
| 75 | static void _set_dbg(abac_pl_t *pl) |
---|
| 76 | { |
---|
| 77 | char *fname=strdup( "/tmp/abac_yap-XXXXXX.pl" ); |
---|
| 78 | int fd = mkstemps( pl->fname, 3 ); |
---|
| 79 | if ( fd == -1) { |
---|
| 80 | printf("Couldn't get a valid temp name %s\n", fname); |
---|
| 81 | free((void*)fname); |
---|
| 82 | YAP_Exit(1); |
---|
| 83 | } |
---|
| 84 | FILE *fptr = fdopen(fd, "w"); |
---|
| 85 | if (fptr == NULL) { |
---|
| 86 | printf("Couldn't open %s for writing\n", fname); |
---|
| 87 | free((void*)fname); |
---|
| 88 | YAP_Exit(1); |
---|
| 89 | } |
---|
| 90 | pl->fptr=fptr; |
---|
| 91 | pl->fname=fname; |
---|
| 92 | } |
---|
| 93 | |
---|
[53e540d] | 94 | /** |
---|
| 95 | * Include some utility routines |
---|
| 96 | */ |
---|
| 97 | abac_pl_t *abac_pl_utility(void) { |
---|
| 98 | /* |
---|
| 99 | append([],L,L). |
---|
| 100 | append([X|L1],L2,[X|L3]):-append(L1,L2,L3). |
---|
| 101 | |
---|
| 102 | appendL([],[]). |
---|
| 103 | appendL([H|T], L) :- |
---|
| 104 | appendL(T,L2), append(H,L2,L). |
---|
| 105 | */ |
---|
| 106 | if(_insert_clause("append([],L,L)")) |
---|
| 107 | YAP_Exit(1); |
---|
| 108 | if(_insert_clause("append([X|L1],L2,[X|L3]):-append(L1,L2,L3)")) |
---|
| 109 | YAP_Exit(1); |
---|
| 110 | if(_insert_clause("appendL([],[])")) |
---|
| 111 | YAP_Exit(1); |
---|
| 112 | if(_insert_clause("appendL([H|T], L) :- appendL(T,L2), append(H,L2,L)")) |
---|
| 113 | YAP_Exit(1); |
---|
[e95d652] | 114 | } |
---|
| 115 | |
---|
[53e540d] | 116 | /** |
---|
| 117 | * Create a new yap structure. |
---|
| 118 | */ |
---|
| 119 | abac_pl_t *abac_pl_new(void) { |
---|
| 120 | |
---|
| 121 | if (YAP_FastInit(NULL) == YAP_BOOT_ERROR) |
---|
| 122 | YAP_Exit(1); |
---|
| 123 | |
---|
| 124 | if (YAP_RunGoal(YAP_MkAtomTerm(YAP_LookupAtom("source")))) { |
---|
[202a7f9] | 125 | if(debug) printf("calling source..\n"); |
---|
[53e540d] | 126 | } else { |
---|
[202a7f9] | 127 | if(debug) printf("calling source failed..\n"); |
---|
| 128 | YAP_Exit(1); |
---|
[53e540d] | 129 | } |
---|
| 130 | |
---|
| 131 | abac_pl_utility(); |
---|
| 132 | |
---|
| 133 | abac_pl_t *pl = abac_xmalloc(sizeof(abac_pl_t)); |
---|
| 134 | pl->fptr=NULL; |
---|
| 135 | pl->fname=NULL; |
---|
| 136 | pl->yap_certs=NULL; |
---|
| 137 | return pl; |
---|
[e95d652] | 138 | } |
---|
| 139 | |
---|
[53e540d] | 140 | /** |
---|
[202a7f9] | 141 | * Add a credential to the db |
---|
[53e540d] | 142 | */ |
---|
| 143 | int abac_pl_add_credential(abac_pl_t *pl, abac_credential_t *cred) |
---|
| 144 | { |
---|
| 145 | int rc=0; |
---|
[202a7f9] | 146 | abac_list_t *clauses=abac_credential_clauses(cred); |
---|
| 147 | if (clauses != NULL) { |
---|
| 148 | char *cur; |
---|
| 149 | abac_list_foreach(clauses, cur, |
---|
| 150 | if(cur) { |
---|
| 151 | if(debug) printf("inserting =>%s\n",cur); |
---|
| 152 | rc=_insert_cred_clause(cur); |
---|
| 153 | } |
---|
| 154 | ); |
---|
[53e540d] | 155 | } |
---|
| 156 | return rc; |
---|
| 157 | } |
---|
[e95d652] | 158 | |
---|
[202a7f9] | 159 | int abac_pl_add_type_credential(abac_pl_t *pl, abac_id_cert_t *id_cert) |
---|
| 160 | { |
---|
| 161 | char *clause=abac_id_clause(id_cert); |
---|
| 162 | if (clause != NULL) { |
---|
| 163 | int rc=_insert_cred_clause(clause); |
---|
| 164 | return rc; |
---|
| 165 | } |
---|
| 166 | return 0; |
---|
| 167 | } |
---|
| 168 | |
---|
[da5afdf] | 169 | /* cases, |
---|
[e95d652] | 170 | ['str'] |
---|
| 171 | ['str1','str2'] |
---|
| 172 | ([] is not possible, and don't care) |
---|
| 173 | */ |
---|
[202a7f9] | 174 | static void _credentials_from_string(abac_stack_t *credentials,char *slist) { |
---|
[e95d652] | 175 | char *cptr=slist; /* current ptr */ |
---|
| 176 | char *sptr; /* string ptr */ |
---|
| 177 | char *ptr; |
---|
[202a7f9] | 178 | int len=0; |
---|
[e95d652] | 179 | char *string; |
---|
| 180 | abac_credential_t *cred=NULL; |
---|
[202a7f9] | 181 | int cnt=0; |
---|
| 182 | |
---|
| 183 | if(debug) |
---|
| 184 | printf("DEBUG:responds from yap(%s)\n",slist); |
---|
[e95d652] | 185 | |
---|
| 186 | /* find first [' */ |
---|
| 187 | ptr=strstr(cptr,"['"); |
---|
| 188 | if(ptr == NULL) |
---|
| 189 | return; |
---|
| 190 | cptr=ptr+2; |
---|
| 191 | sptr=cptr; |
---|
| 192 | while (1) { |
---|
| 193 | /* find next ',' or '] */ |
---|
| 194 | ptr=strstr(cptr,"','"); |
---|
| 195 | if(ptr!=NULL) { |
---|
| 196 | cptr=ptr+3; |
---|
[202a7f9] | 197 | len=(ptr-sptr); |
---|
[e95d652] | 198 | string=strndup(sptr,len); |
---|
| 199 | cred=abac_credential_lookup(string); |
---|
[202a7f9] | 200 | free(string); |
---|
[e95d652] | 201 | if(cred) { |
---|
[da5afdf] | 202 | abac_stack_unique_push(credentials, cred); |
---|
[202a7f9] | 203 | cnt++; |
---|
[e95d652] | 204 | } else { |
---|
| 205 | printf("BAD BAD BAD\n"); |
---|
| 206 | } |
---|
| 207 | sptr=cptr; |
---|
| 208 | } else { |
---|
| 209 | ptr=strstr(cptr,"']"); |
---|
| 210 | if(ptr!=NULL) { |
---|
[202a7f9] | 211 | len=(ptr-sptr); |
---|
[e95d652] | 212 | string=strndup(sptr,len); |
---|
| 213 | cred=abac_credential_lookup(string); |
---|
[202a7f9] | 214 | free(string); |
---|
[e95d652] | 215 | if(cred) { |
---|
[da5afdf] | 216 | abac_stack_unique_push(credentials, cred); |
---|
[202a7f9] | 217 | cnt++; |
---|
[e95d652] | 218 | } else { |
---|
| 219 | printf("BAD BAD BAD\n"); |
---|
| 220 | } |
---|
| 221 | break; |
---|
| 222 | } |
---|
| 223 | } |
---|
| 224 | } |
---|
[202a7f9] | 225 | if(debug) |
---|
| 226 | printf("DEBUG:total %d credentials\n", cnt); |
---|
[e95d652] | 227 | } |
---|
| 228 | |
---|
[da5afdf] | 229 | |
---|
| 230 | static abac_stack_t *_make_yap_query(char *cn_prin, char *cn_rule, char* estring) |
---|
[e95d652] | 231 | { |
---|
| 232 | YAP_Term *eterm; |
---|
| 233 | YAP_Term arg[3]; |
---|
[da5afdf] | 234 | char tmp[5000]; |
---|
[202a7f9] | 235 | abac_stack_t *cred_list = abac_stack_new(); |
---|
| 236 | |
---|
[da5afdf] | 237 | if(debug) printf(" the role part(%s)\n", estring); |
---|
| 238 | arg[0]=YAP_MkAtomTerm(YAP_LookupAtom(cn_prin)); |
---|
| 239 | if(debug) printf(" the principal part(%s)\n", cn_prin); |
---|
| 240 | arg[1]=YAP_ReadBuffer(estring,eterm); |
---|
| 241 | arg[2]=YAP_MkVarTerm(); |
---|
| 242 | YAP_Atom f = YAP_LookupAtom("isMember"); |
---|
| 243 | YAP_Functor func = YAP_MkFunctor(f, 3); |
---|
| 244 | YAP_Term goal=YAP_MkApplTerm(func, 3, arg); |
---|
| 245 | |
---|
| 246 | int rc =YAP_RunGoal( goal ); |
---|
| 247 | if (rc) { |
---|
| 248 | printf("YAP query succeed\n"); |
---|
| 249 | YAP_WriteBuffer(arg[2], tmp, 5000,YAP_WRITE_HANDLE_VARS); |
---|
| 250 | if(debug) printf(" query answer : %s\n", tmp); |
---|
| 251 | /* this is returned as ['string1','string2'] */ |
---|
| 252 | _credentials_from_string(cred_list,tmp); |
---|
| 253 | /**** XXX somehow this got stuck in yap ??? |
---|
| 254 | while (YAP_RestartGoal()) { |
---|
| 255 | if(debug) printf("another success\n"); |
---|
| 256 | YAP_WriteBuffer(arg[2], tmp, 5000,YAP_WRITE_HANDLE_VARS); |
---|
| 257 | if(debug) printf(" query answer : %s\n", tmp); |
---|
| 258 | _credentials_from_string(cred_list,tmp); |
---|
| 259 | } |
---|
| 260 | ***/ |
---|
| 261 | } else { |
---|
| 262 | printf("YAP query failed\n"); |
---|
| 263 | /* YAP_Exit(1); */ |
---|
| 264 | } |
---|
| 265 | return cred_list; |
---|
| 266 | } |
---|
| 267 | |
---|
| 268 | /* 2 types |
---|
| 269 | acme.buys_rocket <- coyote (coyote=prin, acme.buys_rocket=role) |
---|
| 270 | ==> isMember(coyote,role(acme,buys_rocket), L) |
---|
| 271 | |
---|
| 272 | acme.buys_rocket <- acme.preferred_customer -- NOT DONE YET */ |
---|
| 273 | static abac_stack_t *_query_with_role(abac_pl_t *pl, abac_role_t* role, abac_role_t* role_prin) |
---|
| 274 | { |
---|
| 275 | char tmp[5000]; |
---|
| 276 | abac_stack_t *ret=NULL; |
---|
| 277 | |
---|
| 278 | if(1) |
---|
| 279 | _show_yap_db("DEBUG:calling within _query_with_role"); |
---|
[e95d652] | 280 | |
---|
| 281 | char *cn_prin=abac_cn_with_role(role_prin); |
---|
| 282 | char *cn_role=abac_cn_with_role(role); |
---|
| 283 | |
---|
| 284 | if(abac_role_role_name(role_prin)!=NULL) { |
---|
[202a7f9] | 285 | printf("fail, a.r <- b.r query is not implemented yet !!!\n"); |
---|
[e95d652] | 286 | YAP_Exit(1); |
---|
| 287 | } |
---|
| 288 | |
---|
| 289 | if (cn_prin == NULL || cn_role == NULL) { |
---|
| 290 | printf("fail, query's call got bad roles.. \n"); |
---|
| 291 | YAP_Exit(1); |
---|
| 292 | } |
---|
[da5afdf] | 293 | |
---|
| 294 | if(debug) printf("printing up the yap query ..\n"); |
---|
| 295 | char *pstring=abac_role_role_param_string(role); |
---|
| 296 | if(pstring) { |
---|
| 297 | sprintf(tmp,"role(%s,%s,%s)", cn_role, abac_role_role_name(role),pstring); |
---|
| 298 | free(pstring); |
---|
| 299 | } else { |
---|
| 300 | sprintf(tmp,"role(%s,%s)", cn_role, abac_role_role_name(role)); |
---|
| 301 | } |
---|
| 302 | ret=_make_yap_query(cn_prin,cn_role,tmp); |
---|
| 303 | return ret; |
---|
| 304 | } |
---|
| 305 | |
---|
| 306 | static abac_stack_t *_query_with_oset(abac_pl_t *pl, abac_oset_t* oset, abac_oset_t* oset_obj) |
---|
| 307 | { |
---|
| 308 | char tmp[5000]; |
---|
| 309 | abac_stack_t *ret=NULL; |
---|
| 310 | |
---|
| 311 | if(debug) |
---|
| 312 | _show_yap_db("DEBUG:calling within _query_with_oset"); |
---|
| 313 | |
---|
| 314 | char *cn_oset=abac_cn_with_oset(oset); |
---|
| 315 | /* could be obj or principal */ |
---|
| 316 | char *cn_prin=NULL; |
---|
| 317 | if(abac_oset_is_object(oset_obj)) { |
---|
| 318 | cn_prin=abac_oset_object_cn(oset_obj); |
---|
| 319 | } else { |
---|
| 320 | cn_prin=abac_oset_principal_cn(oset_obj); |
---|
| 321 | } |
---|
| 322 | |
---|
| 323 | if(abac_oset_oset_name(oset_obj)!=NULL) { |
---|
| 324 | printf("fail, a.o <- b.o query is not implemented yet !!!\n"); |
---|
| 325 | YAP_Exit(1); |
---|
| 326 | } |
---|
| 327 | |
---|
| 328 | if (cn_prin == NULL || cn_oset == NULL) { |
---|
| 329 | printf("fail, query's call got bad oset.. \n"); |
---|
| 330 | YAP_Exit(1); |
---|
| 331 | } |
---|
| 332 | |
---|
| 333 | if(debug) printf("printing up the yap query ..\n"); |
---|
| 334 | char *pstring=abac_oset_oset_param_string(oset); |
---|
| 335 | if(pstring) { |
---|
| 336 | sprintf(tmp,"oset(%s,%s,%s)", cn_oset, abac_oset_oset_name(oset),pstring); |
---|
| 337 | free(pstring); |
---|
| 338 | } else { |
---|
| 339 | sprintf(tmp,"oset(%s,%s)", cn_oset, abac_oset_oset_name(oset)); |
---|
| 340 | } |
---|
| 341 | |
---|
| 342 | ret=_make_yap_query(cn_prin,cn_oset,tmp); |
---|
| 343 | return ret; |
---|
| 344 | } |
---|
| 345 | |
---|
| 346 | static abac_stack_t *_dump(abac_pl_t *pl) |
---|
| 347 | { |
---|
| 348 | YAP_Term *eterm; |
---|
| 349 | YAP_Term arg[3]; |
---|
| 350 | char tmp[5000]; |
---|
| 351 | abac_stack_t *cred_list = abac_stack_new(); |
---|
| 352 | |
---|
| 353 | if(debug) |
---|
| 354 | _show_yap_db("DEBUG:calling within _dump"); |
---|
| 355 | |
---|
| 356 | arg[0]=YAP_MkVarTerm(); |
---|
| 357 | arg[1]=YAP_MkVarTerm(); |
---|
[e95d652] | 358 | arg[2]=YAP_MkVarTerm(); |
---|
| 359 | YAP_Atom f = YAP_LookupAtom("isMember"); |
---|
| 360 | YAP_Functor func = YAP_MkFunctor(f, 3); |
---|
| 361 | YAP_Term goal=YAP_MkApplTerm(func, 3, arg); |
---|
[da5afdf] | 362 | |
---|
[e95d652] | 363 | int rc =YAP_RunGoal( goal ); |
---|
| 364 | if (rc) { |
---|
[da5afdf] | 365 | printf("YAP dump succeed\n"); |
---|
| 366 | YAP_WriteBuffer(arg[2], tmp, 5000,YAP_WRITE_HANDLE_VARS); |
---|
| 367 | if(debug) printf(" dump answer : %s\n", tmp); |
---|
[e95d652] | 368 | /* this is returned as ['string1','string2'] */ |
---|
| 369 | _credentials_from_string(cred_list,tmp); |
---|
| 370 | while (YAP_RestartGoal()) { |
---|
[da5afdf] | 371 | if(debug) printf("another dump success\n"); |
---|
| 372 | YAP_WriteBuffer(arg[2], tmp, 5000,YAP_WRITE_HANDLE_VARS); |
---|
| 373 | if(debug) printf(" dump restart answer : %s\n", tmp); |
---|
[e95d652] | 374 | _credentials_from_string(cred_list,tmp); |
---|
| 375 | } |
---|
| 376 | } else { |
---|
[da5afdf] | 377 | printf("YAP _dump query failed\n"); |
---|
| 378 | /* YAP_Exit(1); */ |
---|
[e95d652] | 379 | } |
---|
| 380 | return cred_list; |
---|
| 381 | } |
---|
| 382 | |
---|
[da5afdf] | 383 | /** |
---|
| 384 | * Get all the credentials (attribute/issuer cert pairs) from prolog |
---|
| 385 | * (which returns in string form) |
---|
| 386 | */ |
---|
| 387 | abac_stack_t *abac_pl_credentials(abac_pl_t *pl) |
---|
| 388 | { |
---|
| 389 | abac_stack_t *ret=_dump(pl); |
---|
| 390 | return ret; |
---|
| 391 | } |
---|
| 392 | |
---|
[e95d652] | 393 | /** |
---|
| 394 | * Make a query into prolog db |
---|
| 395 | --role acme.preferred_customer --principal coyote |
---|
| 396 | --role acme.prefer_customer.buy_rockets --principlal coyote |
---|
[da5afdf] | 397 | --oset acme.rockets -- object mrx-21 |
---|
| 398 | --oset acme.villans -- principal coyote |
---|
[e95d652] | 399 | */ |
---|
[da5afdf] | 400 | abac_stack_t *abac_pl_query(abac_pl_t *pl, char *roleoset, char *prinobj) |
---|
[e95d652] | 401 | { |
---|
[202a7f9] | 402 | abac_stack_t *ret=NULL; |
---|
[da5afdf] | 403 | int len=strlen(roleoset)+strlen(prinobj)+5; |
---|
| 404 | char* attr_string=(char *) abac_xmalloc(sizeof(char)*len); |
---|
| 405 | sprintf(attr_string,"%s<-%s", roleoset, prinobj); |
---|
| 406 | |
---|
| 407 | if(debug) |
---|
| 408 | printf("abac_pl_query, query string is (%s)\n",attr_string); |
---|
[e95d652] | 409 | |
---|
[da5afdf] | 410 | /* call into yacc parser */ |
---|
| 411 | abac_reset_yyfptr(attr_string); |
---|
| 412 | abac_yyinit(); |
---|
| 413 | int rc=yyparse(); |
---|
| 414 | if (rc) { |
---|
| 415 | free(attr_string); |
---|
[e95d652] | 416 | return NULL; |
---|
| 417 | } |
---|
| 418 | |
---|
[da5afdf] | 419 | if(abac_get_yap_is_oset()) { |
---|
| 420 | abac_oset_t *head_oset = abac_get_yap_head_oset(); |
---|
| 421 | abac_oset_t *tail_oset = abac_get_yap_tail_oset(); |
---|
| 422 | ret=_query_with_oset(pl,head_oset,tail_oset); |
---|
| 423 | } else { |
---|
| 424 | abac_role_t *head_role = abac_get_yap_head_role(); |
---|
| 425 | abac_role_t *tail_role = abac_get_yap_tail_role(); |
---|
| 426 | ret=_query_with_role(pl,head_role,tail_role); |
---|
| 427 | } |
---|
[e95d652] | 428 | return ret; |
---|
| 429 | } |
---|
| 430 | |
---|
| 431 | void abac_pl_free(abac_pl_t *pl) { |
---|
| 432 | if(pl->fptr) { |
---|
| 433 | fflush(pl->fptr); |
---|
| 434 | free(pl->fptr); |
---|
| 435 | } |
---|
| 436 | if(pl->fname) { |
---|
| 437 | unlink(pl->fname); |
---|
| 438 | free(pl->fname); |
---|
| 439 | } |
---|
| 440 | free(pl); |
---|
| 441 | } |
---|
| 442 | |
---|