[e95d652] | 1 | |
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| 2 | /* copied from abac_graph.c |
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| 3 | implementation of the low level using |
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| 4 | yap prolog |
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| 5 | */ |
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| 6 | |
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| 7 | #include <err.h> |
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| 8 | #include <stdio.h> |
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| 9 | #include <assert.h> |
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| 10 | #include <stdlib.h> |
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| 11 | #include <string.h> |
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| 12 | #include <Yap/YapInterface.h> |
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| 13 | |
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[8bd77b5] | 14 | #include "abac_internal.h" |
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[e95d652] | 15 | |
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[8bd77b5] | 16 | #include "abac_pl_yap.h" |
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[e95d652] | 17 | #include "abac_util.h" |
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| 18 | |
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| 19 | #include "uthash.h" |
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| 20 | |
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[da5afdf] | 21 | extern abac_list_t *abac_credential_clauses(abac_credential_t *); |
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[8bd77b5] | 22 | extern char *abac_id_clause(abac_id_credential_t *); |
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| 23 | extern abac_aspect_t *abac_yy_get_rule_tail_aspect(); |
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| 24 | extern abac_aspect_t *abac_yy_get_rule_head_aspect(); |
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[0d0c3a9] | 25 | |
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[202a7f9] | 26 | static int debug=0; |
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[8bd77b5] | 27 | |
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[d5bbd3e] | 28 | /* track constraint's external clause's -unique name id */ |
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[8bd77b5] | 29 | |
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[d5bbd3e] | 30 | static int constraint_label_count=0; |
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| 31 | static char *constraint_label="isABAC_constraint"; |
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[e95d652] | 32 | |
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[646e57e] | 33 | /* |
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| 34 | x can pLadybug buy_rockets from pAcme ? (_arg_for_fact) |
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| 35 | x can pLadybug What from pAcme ? (_arg_for_what) |
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| 36 | x Who can buy_rockets from pAcme ? (_arg_for_who) |
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| 37 | x can pLadybug buy_rockets from Whom ? (_arg_for_whom) |
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| 38 | x can pLadybug What from Whom ? (_arg_for_what_whom) |
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| 39 | the type ordering also dictates the order of partial proof query |
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| 40 | sequence |
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| 41 | */ |
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| 42 | enum _query_type_t { |
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| 43 | e_PL_FACT=0, |
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| 44 | e_PL_WHAT=1, |
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| 45 | e_PL_WHAT_DFLT=2, |
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| 46 | e_PL_WHO=3, |
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| 47 | e_PL_WHOM=4, |
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| 48 | e_PL_WHAT_WHOM=5, |
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| 49 | e_PL_NOMORE=6 |
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| 50 | }; |
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| 51 | |
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[da5afdf] | 52 | // pl -- place holder for now |
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[e95d652] | 53 | struct _abac_pl_t { |
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[abf8d5d] | 54 | /* a_term <- prin */ |
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[646e57e] | 55 | char *whom; |
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| 56 | char *who; |
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| 57 | char *aspect; |
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| 58 | char *what; |
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| 59 | char *whatwith; |
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| 60 | int pcnt; /* pcnt=number of params in whatwith */ |
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| 61 | |
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[abf8d5d] | 62 | int query_made; /* 1+ yes, 0 no, rc is valid only if a query is made */ |
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| 63 | int query_rc; /* rc of query call */ |
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| 64 | int next_rc; /* rc of next-last query */ |
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| 65 | /* proof count = abac_list_size(proof_list) */ |
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[646e57e] | 66 | int is_partial; |
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| 67 | int want_partial; |
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| 68 | int query_type; |
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[abf8d5d] | 69 | abac_list_t *proof_list; /* list of list of cred_list */ |
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| 70 | long safe_t; /* holding the YAP slot for the goal */ |
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[e95d652] | 71 | }; |
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| 72 | |
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[d5bbd3e] | 73 | /***********************************************************/ |
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| 74 | static int _get_next_constraint_label_idx() |
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| 75 | { |
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| 76 | constraint_label_count++; |
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| 77 | return constraint_label_count; |
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| 78 | } |
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| 79 | |
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| 80 | static int _get_constraint_label_idx() |
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| 81 | { |
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| 82 | return constraint_label_count; |
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| 83 | } |
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| 84 | |
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| 85 | /***********************************************************/ |
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| 86 | |
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[53e540d] | 87 | static int _insert_clause(char *str) |
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[e95d652] | 88 | { |
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[dfe6b61] | 89 | YAP_Term eterm; |
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| 90 | YAP_Term goalArgs=YAP_ReadBuffer(str, &eterm); |
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[53e540d] | 91 | char *tmp=YAP_CompileClause(goalArgs); |
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| 92 | if (tmp!=NULL) { /* something is wrong */ |
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| 93 | printf("error: result of compile clause (%s)\n", tmp); |
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| 94 | printf("error: str used (%s)\n", str); |
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| 95 | return 1; |
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[e95d652] | 96 | } |
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[53e540d] | 97 | return 0; |
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[e95d652] | 98 | } |
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| 99 | |
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[53e540d] | 100 | static int _insert_cred_clause(char *cstr) |
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[e95d652] | 101 | { |
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| 102 | int ret=ABAC_CERT_SUCCESS; |
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[53e540d] | 103 | int rc=_insert_clause(cstr); |
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| 104 | if (rc) |
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| 105 | return ABAC_CERT_BAD_YAP; |
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| 106 | return ABAC_CERT_SUCCESS; |
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[e95d652] | 107 | } |
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| 108 | |
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[440ba20] | 109 | void show_yap_db(const char *msg) |
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[e95d652] | 110 | { |
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| 111 | char lstr[]="listing"; |
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[dfe6b61] | 112 | YAP_Term eterm; /* error term */ |
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[e95d652] | 113 | |
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[a7f03f3] | 114 | printf("\n\n/* ========= yap db (%s) */\n",msg); |
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[dfe6b61] | 115 | YAP_Term goal=YAP_ReadBuffer(lstr, &eterm); |
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[e95d652] | 116 | int rc =YAP_RunGoal( goal ); |
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| 117 | if (rc) { |
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[5d1b6dc] | 118 | printf("/* listing ok.. */\n"); |
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[e95d652] | 119 | } else { |
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[5d1b6dc] | 120 | printf("/* listing's rc is bad.. */ \n"); |
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[e95d652] | 121 | YAP_Exit(1); |
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| 122 | } |
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[a7f03f3] | 123 | printf("/* ========= */\n\n"); |
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[e95d652] | 124 | } |
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| 125 | |
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[53e540d] | 126 | /** |
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| 127 | * Include some utility routines |
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| 128 | */ |
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| 129 | abac_pl_t *abac_pl_utility(void) { |
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| 130 | /* |
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| 131 | append([],L,L). |
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| 132 | append([X|L1],L2,[X|L3]):-append(L1,L2,L3). |
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| 133 | |
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| 134 | appendL([],[]). |
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| 135 | appendL([H|T], L) :- |
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| 136 | appendL(T,L2), append(H,L2,L). |
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| 137 | */ |
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| 138 | if(_insert_clause("append([],L,L)")) |
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| 139 | YAP_Exit(1); |
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| 140 | if(_insert_clause("append([X|L1],L2,[X|L3]):-append(L1,L2,L3)")) |
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| 141 | YAP_Exit(1); |
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| 142 | if(_insert_clause("appendL([],[])")) |
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| 143 | YAP_Exit(1); |
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| 144 | if(_insert_clause("appendL([H|T], L) :- appendL(T,L2), append(H,L2,L)")) |
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| 145 | YAP_Exit(1); |
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[e95d652] | 146 | } |
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| 147 | |
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[53e540d] | 148 | /** |
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| 149 | * Create a new yap structure. |
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| 150 | */ |
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| 151 | abac_pl_t *abac_pl_new(void) { |
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| 152 | |
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| 153 | if (YAP_FastInit(NULL) == YAP_BOOT_ERROR) |
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| 154 | YAP_Exit(1); |
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| 155 | |
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| 156 | if (YAP_RunGoal(YAP_MkAtomTerm(YAP_LookupAtom("source")))) { |
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[2485307] | 157 | if(debug) fprintf(stderr, "calling source..\n"); |
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[53e540d] | 158 | } else { |
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[2485307] | 159 | if(debug) fprintf(stderr,"calling source failed..\n"); |
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[202a7f9] | 160 | YAP_Exit(1); |
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[53e540d] | 161 | } |
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| 162 | |
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| 163 | abac_pl_utility(); |
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| 164 | |
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| 165 | abac_pl_t *pl = abac_xmalloc(sizeof(abac_pl_t)); |
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[646e57e] | 166 | |
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| 167 | pl->who=NULL; |
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| 168 | pl->whom = NULL; |
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| 169 | pl->what = NULL; |
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| 170 | pl->whatwith = NULL; |
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| 171 | pl->aspect = NULL; |
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| 172 | pl->pcnt=0; |
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[abf8d5d] | 173 | pl->query_made=0; |
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| 174 | pl->query_rc=0; |
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[646e57e] | 175 | pl->is_partial=0; |
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| 176 | pl->want_partial=1; |
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| 177 | pl->query_type=e_PL_FACT; |
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[abf8d5d] | 178 | pl->next_rc=0; |
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| 179 | pl->proof_list=NULL; |
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| 180 | pl->safe_t=0; |
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[53e540d] | 181 | return pl; |
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[e95d652] | 182 | } |
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| 183 | |
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[646e57e] | 184 | int abac_pl_returning_partial(abac_pl_t *pl) |
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| 185 | { |
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| 186 | return pl->is_partial; |
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| 187 | } |
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| 188 | |
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[abf8d5d] | 189 | /* returns the number of solution so far */ |
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| 190 | int abac_pl_proof_cnt(abac_pl_t *pl) |
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| 191 | { |
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| 192 | if(pl->proof_list) |
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| 193 | return abac_list_size(pl->proof_list); |
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| 194 | return 0; |
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| 195 | } |
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| 196 | |
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[646e57e] | 197 | int abac_pl_is_partial(abac_pl_t *pl) |
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| 198 | { |
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| 199 | return pl->is_partial; |
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| 200 | } |
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| 201 | |
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[abf8d5d] | 202 | /* is this the conclusion of the query ? */ |
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| 203 | /* 1 is yes, 0 N/A */ |
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| 204 | int abac_pl_done_yet(abac_pl_t *pl) |
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| 205 | { |
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| 206 | if(pl->query_made) { |
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| 207 | if(pl->query_rc) { |
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| 208 | if(!pl->next_rc) return 1; |
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| 209 | return 0; |
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| 210 | } else return 1; /* even init query failed */ |
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| 211 | } |
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| 212 | return 0; |
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| 213 | } |
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| 214 | |
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[646e57e] | 215 | void abac_pl_set_no_partial(abac_pl_t *pl) |
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| 216 | { |
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| 217 | pl->want_partial=0; |
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| 218 | } |
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| 219 | |
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| 220 | void abac_pl_set_want_partial(abac_pl_t *pl) |
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| 221 | { |
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| 222 | pl->want_partial=1; |
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| 223 | } |
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| 224 | |
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[abf8d5d] | 225 | static void _free_p_list(abac_list_t *p) |
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| 226 | { |
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| 227 | if( p != NULL ) { |
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| 228 | if(abac_list_size(p) != 0) { |
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| 229 | abac_credential_t *cur=NULL; |
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| 230 | abac_list_foreach(p, cur, |
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| 231 | abac_credential_free(cur); |
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| 232 | ); |
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| 233 | } |
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| 234 | abac_list_free(p); |
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| 235 | } |
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| 236 | } |
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| 237 | |
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| 238 | static void _free_pf_list(abac_list_t *p) |
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| 239 | { |
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| 240 | |
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| 241 | if(p != NULL) { |
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| 242 | if(abac_list_size(p) != 0) { |
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| 243 | abac_list_t *cur=NULL; |
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| 244 | abac_list_foreach(p, cur, |
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| 245 | _free_p_list(cur); |
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| 246 | ); |
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| 247 | } |
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| 248 | abac_list_free(p); |
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| 249 | } |
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| 250 | } |
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| 251 | |
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| 252 | void abac_pl_free(abac_pl_t *pl) { |
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[646e57e] | 253 | if(pl->who) free(pl->who); |
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| 254 | if(pl->whom) free(pl->whom); |
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| 255 | if(pl->what) free(pl->what); |
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| 256 | if(pl->whatwith) free(pl->whatwith); |
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| 257 | if(pl->aspect) free(pl->aspect); |
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[abf8d5d] | 258 | _free_pf_list(pl->proof_list); |
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| 259 | free(pl); |
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| 260 | } |
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| 261 | |
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| 262 | /* this is done whenever a new query starts in */ |
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[646e57e] | 263 | static void _reset_pl(abac_pl_t *pl, char *who, |
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| 264 | char *what, char *whom, char *aspect, char *whatwith, int pcnt) |
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[abf8d5d] | 265 | { |
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| 266 | if(pl->safe_t) { |
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| 267 | YAP_RecoverSlots(1); |
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| 268 | YAP_Reset(); |
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| 269 | } |
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| 270 | /* free the old ones */ |
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[646e57e] | 271 | if(pl->who) free(pl->who); |
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| 272 | if(pl->whom) free(pl->whom); |
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| 273 | if(pl->what) free(pl->what); |
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| 274 | if(pl->whatwith) free(pl->whatwith); |
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| 275 | if(pl->aspect) free(pl->aspect); |
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| 276 | |
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| 277 | pl->who = (who !=NULL)?abac_xstrdup(who):NULL; |
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| 278 | pl->whom = (whom !=NULL)?abac_xstrdup(whom):NULL; |
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| 279 | pl->what = (what!=NULL)?abac_xstrdup(what):NULL; |
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| 280 | pl->whatwith = (whatwith!=NULL)?abac_xstrdup(whatwith):NULL; |
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| 281 | pl->aspect = (aspect!=NULL)?abac_xstrdup(aspect):NULL; |
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| 282 | |
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| 283 | pl->pcnt=pcnt; |
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| 284 | |
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[abf8d5d] | 285 | pl->query_made=0; |
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| 286 | pl->query_rc=0; |
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| 287 | pl->next_rc=0; |
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[646e57e] | 288 | pl->is_partial=0; |
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| 289 | pl->query_type=e_PL_FACT; |
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[abf8d5d] | 290 | _free_pf_list(pl->proof_list); |
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| 291 | pl->proof_list=abac_list_new(); |
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| 292 | pl->safe_t=0; |
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| 293 | } |
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| 294 | |
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[53e540d] | 295 | /** |
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[5730a10] | 296 | * Add a credential to the db, not duplicating a copy and so |
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| 297 | * don't try to free it after this call. |
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[53e540d] | 298 | */ |
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| 299 | int abac_pl_add_credential(abac_pl_t *pl, abac_credential_t *cred) |
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| 300 | { |
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| 301 | int rc=0; |
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[202a7f9] | 302 | abac_list_t *clauses=abac_credential_clauses(cred); |
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| 303 | if (clauses != NULL) { |
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| 304 | char *cur; |
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| 305 | abac_list_foreach(clauses, cur, |
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| 306 | if(cur) { |
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[2485307] | 307 | if(debug) fprintf(stderr,"inserting =>%s\n",cur); |
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[202a7f9] | 308 | rc=_insert_cred_clause(cur); |
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| 309 | } |
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| 310 | ); |
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[53e540d] | 311 | } |
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| 312 | return rc; |
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| 313 | } |
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[e95d652] | 314 | |
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[8bd77b5] | 315 | int abac_pl_add_type_credential(abac_pl_t *pl, abac_id_credential_t *id_cert) |
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[202a7f9] | 316 | { |
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| 317 | char *clause=abac_id_clause(id_cert); |
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| 318 | if (clause != NULL) { |
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| 319 | int rc=_insert_cred_clause(clause); |
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| 320 | return rc; |
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| 321 | } |
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| 322 | return 0; |
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| 323 | } |
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| 324 | |
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[d5bbd3e] | 325 | /* string1(S):- S="abc";S="efg";S="ijk" */ |
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[7b548fa] | 326 | char *abac_pl_add_range_constraint_clause(char *var, char *tmplist) |
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[d5bbd3e] | 327 | { |
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| 328 | int i=_get_next_constraint_label_idx(); |
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| 329 | char *tmp=NULL; |
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| 330 | asprintf(&tmp,"%s_%d(%s) :- %s", constraint_label, i, var, tmplist); |
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| 331 | int rc=_insert_cred_clause(tmp); |
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| 332 | free(tmp); |
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| 333 | if(rc) |
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[7b548fa] | 334 | panic("abac_pl_add_range_constraint_clause, failed to insert"); |
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[d5bbd3e] | 335 | asprintf(&tmp,"%s_%d(%s)", constraint_label, i, var); |
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| 336 | return tmp; |
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| 337 | } |
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| 338 | |
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[da5afdf] | 339 | /* cases, |
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[e95d652] | 340 | ['str'] |
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| 341 | ['str1','str2'] |
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| 342 | ([] is not possible, and don't care) |
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| 343 | */ |
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[abf8d5d] | 344 | static void _credentials_from_string(abac_list_t *credentials,char *slist) { |
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[e95d652] | 345 | char *cptr=slist; /* current ptr */ |
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| 346 | char *sptr; /* string ptr */ |
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| 347 | char *ptr; |
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[202a7f9] | 348 | int len=0; |
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[e95d652] | 349 | char *string; |
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| 350 | abac_credential_t *cred=NULL; |
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[202a7f9] | 351 | int cnt=0; |
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| 352 | |
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[e95d652] | 353 | /* find first [' */ |
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| 354 | ptr=strstr(cptr,"['"); |
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| 355 | if(ptr == NULL) |
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| 356 | return; |
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| 357 | cptr=ptr+2; |
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| 358 | sptr=cptr; |
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| 359 | while (1) { |
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| 360 | /* find next ',' or '] */ |
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| 361 | ptr=strstr(cptr,"','"); |
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| 362 | if(ptr!=NULL) { |
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| 363 | cptr=ptr+3; |
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[202a7f9] | 364 | len=(ptr-sptr); |
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[e95d652] | 365 | string=strndup(sptr,len); |
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| 366 | cred=abac_credential_lookup(string); |
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[202a7f9] | 367 | free(string); |
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[e95d652] | 368 | if(cred) { |
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[abf8d5d] | 369 | int i=abac_list_unique_add(credentials, cred); |
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[7b548fa] | 370 | if(i) cnt++; |
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[e95d652] | 371 | } else { |
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[9b43fc3] | 372 | printf("BAD BAD\n"); |
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[e95d652] | 373 | } |
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| 374 | sptr=cptr; |
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| 375 | } else { |
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| 376 | ptr=strstr(cptr,"']"); |
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| 377 | if(ptr!=NULL) { |
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[202a7f9] | 378 | len=(ptr-sptr); |
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[e95d652] | 379 | string=strndup(sptr,len); |
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| 380 | cred=abac_credential_lookup(string); |
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[202a7f9] | 381 | free(string); |
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[e95d652] | 382 | if(cred) { |
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[abf8d5d] | 383 | int i=abac_list_unique_add(credentials, cred); |
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[7b548fa] | 384 | if(i) cnt++; |
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[e95d652] | 385 | } else { |
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| 386 | printf("BAD BAD BAD\n"); |
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| 387 | } |
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| 388 | break; |
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| 389 | } |
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| 390 | } |
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| 391 | } |
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[202a7f9] | 392 | if(debug) |
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[2485307] | 393 | fprintf(stderr,"DEBUG:total %d credentials\n", cnt); |
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| 394 | } |
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| 395 | |
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| 396 | /* MAX 1024x1024, double as it goes */ |
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| 397 | static int try_again(int sz, char **tptr) |
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| 398 | { |
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| 399 | int blk=1024*2; /* 2048 */ |
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| 400 | int max=1024*1024; |
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| 401 | int size; |
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| 402 | char *tmp = NULL; |
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| 403 | |
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| 404 | if(sz==0) { |
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| 405 | size = (sizeof(char) * (blk+1)); |
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| 406 | } else { |
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| 407 | if (sz>=max) { |
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| 408 | size=0; |
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| 409 | *tptr=tmp; |
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| 410 | return 0; |
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| 411 | } |
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| 412 | size=sz*2+1; |
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| 413 | if(size > max) size=max; |
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| 414 | } |
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| 415 | |
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| 416 | tmp = (char *) YAP_AllocSpaceFromYap(size); |
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| 417 | if(tmp==NULL) { |
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| 418 | fprintf(stderr,"ERROR: malloc failed !!!\n"); |
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| 419 | YAP_Exit(1); |
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| 420 | } |
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| 421 | *tptr=tmp; |
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| 422 | return size; |
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[e95d652] | 423 | } |
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| 424 | |
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[646e57e] | 425 | abac_list_t *run_goal(abac_pl_t *pl, YAP_Term *arg) |
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[e95d652] | 426 | { |
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[646e57e] | 427 | abac_list_t *cred_list=abac_list_new(); |
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[da5afdf] | 428 | YAP_Atom f = YAP_LookupAtom("isMember"); |
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| 429 | YAP_Functor func = YAP_MkFunctor(f, 3); |
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| 430 | YAP_Term goal=YAP_MkApplTerm(func, 3, arg); |
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| 431 | |
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[abf8d5d] | 432 | pl->safe_t = YAP_InitSlot(goal); |
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| 433 | pl->query_rc =YAP_RunGoal(goal); |
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| 434 | pl->query_made=1; |
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| 435 | pl->next_rc=pl->query_rc; |
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| 436 | if (pl->query_rc) { |
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[646e57e] | 437 | if(pl->is_partial) |
---|
| 438 | printf("A partial proof(type:%d)\n",pl->query_type); |
---|
| 439 | else printf("YAP query succeed\n"); |
---|
[2485307] | 440 | char *tmp=NULL; |
---|
| 441 | int tmp_sz=try_again(0, &tmp); |
---|
[abf8d5d] | 442 | YAP_Term argterm=YAP_ArgOfTerm(3,YAP_GetFromSlot(pl->safe_t)); |
---|
[2485307] | 443 | while(1) { |
---|
[fc943ee] | 444 | /* not in 6.2.2 |
---|
[6244e28] | 445 | int rc=YAP_WriteBuffer(argterm, tmp, tmp_sz,YAP_WRITE_HANDLE_VARS); |
---|
[05f6d35] | 446 | */ |
---|
| 447 | YAP_WriteBuffer(argterm, tmp, tmp_sz,YAP_WRITE_HANDLE_VARS); |
---|
| 448 | /* |
---|
| 449 | if(debug) fprintf(stderr,"call YAP_WriteBuffer: rc(%d) tmp_sz(%d)\n", rc, tmp_sz); |
---|
| 450 | */ |
---|
[6244e28] | 451 | if(strlen(tmp) > 5 && tmp[0]=='\[') { |
---|
[fc943ee] | 452 | if(debug) fprintf(stderr,"what came back .. (%s)\n", tmp); |
---|
[2485307] | 453 | break; |
---|
[6244e28] | 454 | } |
---|
[2485307] | 455 | tmp_sz=try_again(tmp_sz,&tmp); |
---|
[fc943ee] | 456 | if(debug) fprintf(stderr,"try_again: tmp_sz(%d)\n", tmp_sz); |
---|
[bf68132] | 457 | if(tmp_sz==0) { |
---|
| 458 | fprintf(stderr," PANIC, run out of heap space..\n"); |
---|
| 459 | YAP_Exit(1); |
---|
| 460 | } |
---|
[2485307] | 461 | } |
---|
[da5afdf] | 462 | /* this is returned as ['string1','string2'] */ |
---|
[2485307] | 463 | if(debug) fprintf(stderr," query answer : %s(%d)\n", tmp, strlen(tmp)); |
---|
[da5afdf] | 464 | _credentials_from_string(cred_list,tmp); |
---|
[abf8d5d] | 465 | if(abac_list_size(cred_list)==0) { |
---|
[2485307] | 466 | fprintf(stderr,"CAN NOT retrieve result properly from YAP!!!\n"); |
---|
| 467 | YAP_Exit(1); |
---|
| 468 | } |
---|
[abf8d5d] | 469 | abac_list_add(pl->proof_list, cred_list); |
---|
[b92a620] | 470 | YAP_FreeSpaceFromYap(tmp); |
---|
[da5afdf] | 471 | } else { |
---|
[646e57e] | 472 | /* don't print anything if it is running a parital proof goal */ |
---|
| 473 | if(!pl->is_partial) |
---|
| 474 | printf("YAP query failed\n"); |
---|
| 475 | |
---|
[da5afdf] | 476 | } |
---|
| 477 | return cred_list; |
---|
| 478 | } |
---|
| 479 | |
---|
[646e57e] | 480 | /*************************************************************************/ |
---|
| 481 | YAP_Term _make_term(char *term) { |
---|
| 482 | YAP_Term eterm; |
---|
| 483 | YAP_Term ret; |
---|
| 484 | if(term[0]=='\'' || term[0]=='"') { |
---|
| 485 | ret =YAP_ReadBuffer(term,&eterm); |
---|
| 486 | } else { |
---|
| 487 | ret = YAP_MkAtomTerm(YAP_LookupAtom(term)); |
---|
| 488 | } |
---|
| 489 | } |
---|
| 490 | |
---|
| 491 | // isMember(who,aspect(whom,what,whatwith)) |
---|
| 492 | /* aspect(whom, what, whatwith) */ |
---|
| 493 | YAP_Term _aspect_base(char *whom,char *aspect, char *what, char *whatwith) |
---|
| 494 | { |
---|
| 495 | YAP_Term eterm; |
---|
| 496 | YAP_Term ret; |
---|
| 497 | |
---|
| 498 | char *estring=NULL; |
---|
| 499 | if(whatwith) |
---|
| 500 | asprintf(&estring, "%s(%s,%s,%s)",aspect,whom,what,whatwith); |
---|
| 501 | else asprintf(&estring, "%s(%s,%s)",aspect,whom,what); |
---|
| 502 | if(debug) fprintf(stderr,"_aspect_base, doing %s\n",estring); |
---|
| 503 | ret=YAP_ReadBuffer(estring,&eterm); |
---|
| 504 | free(estring); |
---|
| 505 | return ret; |
---|
| 506 | } |
---|
| 507 | |
---|
| 508 | /* generate a string of whatwith that are of ?variable */ |
---|
| 509 | char *_make_whatwith_var(char *whatwith, int pcnt) |
---|
| 510 | { |
---|
| 511 | /* this is a dumb count since it is in porting directory */ |
---|
| 512 | if(whatwith==NULL || pcnt==0) return NULL; |
---|
| 513 | char *tmp=NULL; |
---|
| 514 | char *ptr=NULL; |
---|
| 515 | int i; |
---|
| 516 | for(i=0;i<pcnt;i++) { |
---|
| 517 | ptr=tmp; |
---|
| 518 | tmp=NULL; |
---|
| 519 | if(i == 0) |
---|
| 520 | asprintf(&tmp,"Whatwith%d",i); |
---|
| 521 | else asprintf(&tmp,"%s,Whatwith%d",ptr,i); |
---|
| 522 | } |
---|
| 523 | return tmp; |
---|
| 524 | } |
---|
| 525 | |
---|
| 526 | /* aspect(X, Y, Whatwith) */ |
---|
| 527 | YAP_Term _aspect_what_whom(char *whom,char *aspect, char *what, char *whatwith) |
---|
| 528 | { |
---|
| 529 | YAP_Term ret=_aspect_base("Whom",aspect,"What",whatwith); |
---|
| 530 | return ret; |
---|
| 531 | } |
---|
| 532 | |
---|
| 533 | /* aspect(whom,Y,Whatwith) */ |
---|
| 534 | /* call with char *tmp=_make_whatwith_var(whatwith); */ |
---|
| 535 | YAP_Term _aspect_what(char *whom,char *aspect, char *what, char *whatwith) |
---|
| 536 | { |
---|
| 537 | YAP_Term ret=_aspect_base(whom,aspect,"What",whatwith); |
---|
| 538 | return ret; |
---|
| 539 | } |
---|
| 540 | |
---|
| 541 | /* aspect(X,what,whatwith) */ |
---|
| 542 | YAP_Term _aspect_whom(char *whom,char *aspect, char *what, char *whatwith) |
---|
| 543 | { |
---|
| 544 | YAP_Term ret=_aspect_base("Whom",aspect,what,whatwith); |
---|
| 545 | return ret; |
---|
| 546 | } |
---|
| 547 | |
---|
| 548 | /* aspect(whom,what,whatwith) */ |
---|
| 549 | YAP_Term _aspect_fact(char *whom,char *aspect, char *what, char* whatwith) |
---|
| 550 | { |
---|
| 551 | YAP_Term ret=_aspect_base(whom,aspect,what,whatwith); |
---|
| 552 | return ret; |
---|
| 553 | } |
---|
| 554 | |
---|
| 555 | // Whom.What <- ladybug |
---|
| 556 | // isMember(ladybug, role(W1, W2), R) |
---|
| 557 | static void _arg_for_what_whom(YAP_Term *arg,char *who, char *whom, |
---|
| 558 | char *aspect, char*what, char *whatwith, int pcnt) |
---|
| 559 | { |
---|
| 560 | arg[0] = _make_term(who); |
---|
| 561 | char *tmp=_make_whatwith_var(whatwith,pcnt); |
---|
| 562 | arg[1] = _aspect_what_whom(who,aspect,what,tmp); |
---|
| 563 | if(tmp) free(tmp); |
---|
| 564 | arg[2] = YAP_MkVarTerm(); |
---|
| 565 | } |
---|
| 566 | |
---|
| 567 | // pAcme.What <- ladybug |
---|
| 568 | // isMember(ladybug, role(pAcme, W), R) |
---|
| 569 | static void _arg_for_what(YAP_Term *arg,char *who, char* whom, |
---|
| 570 | char *aspect, char*what, char*whatwith, int pcnt) |
---|
| 571 | { |
---|
| 572 | arg[0] = _make_term(who); |
---|
| 573 | char *tmp=_make_whatwith_var(whatwith,pcnt); |
---|
| 574 | arg[1] = _aspect_what(whom,aspect,what,tmp); |
---|
| 575 | if(tmp) free(tmp); |
---|
| 576 | arg[2] = YAP_MkVarTerm(); |
---|
| 577 | } |
---|
| 578 | |
---|
| 579 | // W.rocket <- ladybug |
---|
| 580 | // isMember(ladybug, role(W, buy_rockets), R) |
---|
| 581 | static void _arg_for_whom(YAP_Term *arg, char *who, char*whom, |
---|
| 582 | char *aspect, char *what, char*whatwith) |
---|
| 583 | { |
---|
| 584 | arg[0] = _make_term(who); |
---|
| 585 | arg[1] = _aspect_whom(whom,aspect,what,whatwith); |
---|
| 586 | arg[2] = YAP_MkVarTerm(); |
---|
| 587 | } |
---|
| 588 | |
---|
| 589 | // Acme.rocket <- V |
---|
| 590 | // isMember(V, role(pAcme, buy_rockets), R) |
---|
| 591 | static int _arg_for_who(YAP_Term *arg, char *who,char *whom, |
---|
| 592 | char *aspect, char* what, char*whatwith) |
---|
| 593 | { |
---|
| 594 | arg[0] = YAP_MkVarTerm(); |
---|
| 595 | arg[1] = _aspect_fact(whom, aspect, what, whatwith); |
---|
| 596 | arg[2] = YAP_MkVarTerm(); |
---|
| 597 | } |
---|
| 598 | |
---|
| 599 | // Acme.rocket <- x |
---|
| 600 | // isMember(x, role(pAcme, buy_rockets), R) |
---|
| 601 | static void _arg_for_fact(YAP_Term *arg,char *who,char *whom, |
---|
| 602 | char* aspect, char *what, char*whatwith) |
---|
| 603 | { |
---|
| 604 | arg[0] = _make_term(who); |
---|
| 605 | arg[1] = _aspect_fact(whom, aspect, what, whatwith); |
---|
| 606 | arg[2] = YAP_MkVarTerm(); |
---|
| 607 | } |
---|
| 608 | |
---|
| 609 | |
---|
| 610 | static abac_list_t *_make_partial_query(abac_pl_t *pl) |
---|
| 611 | { |
---|
| 612 | abac_list_t *ret=abac_list_new(); |
---|
| 613 | pl->is_partial=1; |
---|
| 614 | char *who=pl->who; |
---|
| 615 | char *whom=pl->whom; |
---|
| 616 | char *aspect=pl->aspect; |
---|
| 617 | char *what=pl->what; |
---|
| 618 | char *whatwith=pl->whatwith; |
---|
| 619 | int pcnt=pl->pcnt; |
---|
| 620 | if(debug) fprintf(stderr,"making make_partial_query..\n"); |
---|
| 621 | |
---|
| 622 | switch (pl->query_type) { |
---|
| 623 | case e_PL_FACT: /* try what */ |
---|
| 624 | { |
---|
| 625 | YAP_Term arg[3]; |
---|
| 626 | if(debug) fprintf(stderr,"... 1st partial attempt\n"); |
---|
| 627 | pl->query_type = e_PL_WHAT; |
---|
| 628 | _arg_for_what(arg,who,whom, aspect, what, whatwith, pcnt); |
---|
| 629 | ret=run_goal(pl,arg); |
---|
| 630 | if(pcnt==0) pl->query_type= e_PL_WHAT_DFLT; |
---|
| 631 | if(pl->query_rc) return ret; |
---|
| 632 | break; |
---|
| 633 | } |
---|
| 634 | case e_PL_WHAT: /* try what with no params if need to */ |
---|
| 635 | { |
---|
| 636 | YAP_Term arg[3]; |
---|
| 637 | if(debug) fprintf(stderr,"... 2nd partial attempt\n"); |
---|
| 638 | pl->query_type = e_PL_WHAT_DFLT; |
---|
| 639 | _arg_for_what(arg,who,whom, aspect, what, whatwith, 0); |
---|
| 640 | ret=run_goal(pl,arg); |
---|
| 641 | if(pl->query_rc) return ret; |
---|
| 642 | break; |
---|
| 643 | } |
---|
| 644 | case e_PL_WHAT_DFLT: /* try who */ |
---|
| 645 | { |
---|
| 646 | YAP_Term arg[3]; |
---|
| 647 | if(debug) fprintf(stderr,"... 2nd half partial attempt\n"); |
---|
| 648 | pl->query_type = e_PL_WHO; |
---|
| 649 | _arg_for_who(arg,who,whom, aspect, what, whatwith); |
---|
| 650 | ret=run_goal(pl,arg); |
---|
| 651 | if(pl->query_rc) return ret; |
---|
| 652 | break; |
---|
| 653 | } |
---|
| 654 | case e_PL_WHO: /* try whom */ |
---|
| 655 | { |
---|
| 656 | YAP_Term arg[3]; |
---|
| 657 | if(debug) fprintf(stderr,"... 3rd partial attempt\n"); |
---|
| 658 | pl->query_type = e_PL_WHOM; |
---|
| 659 | _arg_for_whom(arg,who,whom, aspect, what, whatwith); |
---|
| 660 | ret=run_goal(pl,arg); |
---|
| 661 | if(pl->query_rc) return ret; |
---|
| 662 | break; |
---|
| 663 | } |
---|
| 664 | case e_PL_WHOM: /* try what-whom */ |
---|
| 665 | { |
---|
| 666 | YAP_Term arg[3]; |
---|
| 667 | if(debug) fprintf(stderr,"... 4th partial attempt\n"); |
---|
| 668 | pl->query_type = e_PL_WHAT_WHOM; |
---|
| 669 | _arg_for_what_whom(arg,who,whom, aspect, what, whatwith,pcnt); |
---|
| 670 | ret=run_goal(pl,arg); |
---|
| 671 | if(pl->query_rc) return ret; |
---|
| 672 | break; |
---|
| 673 | } |
---|
| 674 | default : |
---|
| 675 | { |
---|
| 676 | if(debug) fprintf(stderr,"... no more partial query to try\n"); |
---|
| 677 | pl->query_type = e_PL_NOMORE; |
---|
| 678 | } |
---|
| 679 | } |
---|
| 680 | return ret; |
---|
| 681 | } |
---|
| 682 | |
---|
| 683 | /* make a query and extract just first set of result, |
---|
| 684 | simple = rt0 |
---|
| 685 | aspect => role/oset |
---|
| 686 | aspect_string => rest of params |
---|
| 687 | prin => principal |
---|
| 688 | issuer => issuer |
---|
| 689 | estring => aspect(issuer, aspect_type_string) |
---|
| 690 | */ |
---|
| 691 | static abac_list_t *_make_yap_query(abac_pl_t *pl, char *who, |
---|
| 692 | char *whom, char *aspect, char *what, char *whatwith, int pcnt) |
---|
| 693 | { |
---|
| 694 | if(debug) { |
---|
| 695 | fprintf(stderr,"_make_yap_query: the who part(%s)\n", who); |
---|
| 696 | fprintf(stderr,"_make_yap_query: whom part(%s)\n", whom); |
---|
| 697 | fprintf(stderr,"_make_yap_query: the role/oset (%s)\n", aspect); |
---|
| 698 | fprintf(stderr,"_make_yap_query: aspect what (%s)\n", what); |
---|
| 699 | fprintf(stderr,"_make_yap_query: pcnt (%d)\n", pcnt); |
---|
| 700 | if(whatwith) |
---|
| 701 | fprintf(stderr,"_make_yap_query: aspect what part(%s)\n", whatwith); |
---|
| 702 | } |
---|
| 703 | if(debug) fprintf(stderr,"making a yap query..\n"); |
---|
| 704 | |
---|
| 705 | /* run query on fact goal */ |
---|
| 706 | YAP_Term arg[3]; |
---|
| 707 | _arg_for_fact(arg, who,whom, aspect, what, whatwith); |
---|
| 708 | abac_list_t *ret=run_goal(pl,arg); |
---|
| 709 | |
---|
| 710 | /* fact query failed and so run partial query */ |
---|
| 711 | if(!pl->query_rc && pl->want_partial) { |
---|
| 712 | while(pl->query_type != e_PL_NOMORE) { |
---|
| 713 | abac_list_free(ret); |
---|
| 714 | ret=_make_partial_query(pl); |
---|
| 715 | if( pl->query_rc ) break; |
---|
| 716 | } |
---|
| 717 | } |
---|
| 718 | return ret; |
---|
| 719 | } |
---|
| 720 | |
---|
[abf8d5d] | 721 | /* make a query for next possible solution proof */ |
---|
| 722 | static abac_list_t *_query_again(abac_pl_t *pl) |
---|
| 723 | { |
---|
| 724 | abac_list_t *cred_list=abac_list_new(); |
---|
| 725 | |
---|
[646e57e] | 726 | if(debug) fprintf(stderr,"making query_again call..\n"); |
---|
[abf8d5d] | 727 | pl->next_rc=YAP_RestartGoal(); |
---|
| 728 | pl->query_made++; |
---|
| 729 | |
---|
| 730 | char *tmp=NULL; |
---|
| 731 | int tmp_sz=try_again(0, &tmp); |
---|
| 732 | YAP_Term argterm=YAP_ArgOfTerm(3,YAP_GetFromSlot(pl->safe_t)); |
---|
| 733 | if(pl->next_rc) { |
---|
[646e57e] | 734 | if(debug) fprintf(stderr,"query_again: another success\n"); |
---|
| 735 | if(pl->is_partial) |
---|
| 736 | printf("A partial proof(type:%d)\n",pl->query_type); |
---|
[abf8d5d] | 737 | while(1) { |
---|
| 738 | YAP_WriteBuffer(argterm, tmp, tmp_sz,YAP_WRITE_HANDLE_VARS); |
---|
| 739 | if(strlen(tmp) > 5 && tmp[0]=='\[') |
---|
| 740 | break; |
---|
| 741 | tmp_sz=try_again(tmp_sz,&tmp); |
---|
| 742 | if(tmp_sz==0) { |
---|
| 743 | fprintf(stderr," PANIC, run out of heap space..\n"); |
---|
| 744 | YAP_Exit(1); |
---|
| 745 | } |
---|
| 746 | } |
---|
| 747 | /* this is returned as ['string1','string2'] */ |
---|
| 748 | if(debug) fprintf(stderr," query answer : %s(%d)\n", tmp, strlen(tmp)); |
---|
| 749 | _credentials_from_string(cred_list,tmp); |
---|
| 750 | if(abac_list_size(cred_list)==0) { |
---|
| 751 | fprintf(stderr,"CAN NOT retrieve result properly from YAP!!!\n"); |
---|
| 752 | YAP_Exit(1); |
---|
| 753 | } |
---|
| 754 | abac_list_add(pl->proof_list, cred_list); |
---|
| 755 | YAP_FreeSpaceFromYap(tmp); |
---|
[646e57e] | 756 | } else { |
---|
| 757 | if(debug) fprintf(stderr,"query_again: fail finding next\n"); |
---|
| 758 | if(pl->is_partial) { /* if there is more partial query to make */ |
---|
| 759 | while(pl->query_type != e_PL_NOMORE) { |
---|
| 760 | abac_list_free(cred_list); |
---|
| 761 | cred_list=_make_partial_query(pl); |
---|
| 762 | if( pl->query_rc ) break; |
---|
| 763 | } |
---|
| 764 | } |
---|
[abf8d5d] | 765 | } |
---|
| 766 | return cred_list; |
---|
| 767 | } |
---|
| 768 | |
---|
| 769 | abac_stack_t *_make_cred_stack(abac_list_t *p) |
---|
| 770 | { |
---|
| 771 | abac_stack_t *ret=abac_stack_new(); |
---|
| 772 | if(abac_list_size(p) != 0) { |
---|
| 773 | abac_credential_t *cur=NULL; |
---|
| 774 | abac_list_foreach(p, cur, |
---|
| 775 | abac_stack_push(ret, (void *)abac_credential_dup(cur)); |
---|
| 776 | ); |
---|
| 777 | } |
---|
| 778 | return ret; |
---|
| 779 | } |
---|
| 780 | |
---|
| 781 | /* force a backtrack to get next solution proof */ |
---|
| 782 | abac_stack_t *abac_pl_query_again(abac_pl_t *pl) |
---|
| 783 | { |
---|
| 784 | abac_list_t *rlist=_query_again(pl); |
---|
| 785 | abac_stack_t *ret=_make_cred_stack(rlist); |
---|
| 786 | return ret; |
---|
| 787 | } |
---|
| 788 | |
---|
[da5afdf] | 789 | /* 2 types |
---|
| 790 | acme.buys_rocket <- coyote (coyote=prin, acme.buys_rocket=role) |
---|
| 791 | ==> isMember(coyote,role(acme,buys_rocket), L) |
---|
[440ba20] | 792 | acme.buys_rocket <- acme.preferred_customer -- NOT valid |
---|
| 793 | */ |
---|
[8bd77b5] | 794 | static abac_stack_t *_query_with_aspect(abac_pl_t *pl, abac_aspect_t* head, abac_aspect_t* tail) |
---|
[da5afdf] | 795 | { |
---|
| 796 | abac_stack_t *ret=NULL; |
---|
[2485307] | 797 | char *tmp=NULL; |
---|
[da5afdf] | 798 | |
---|
[08b8da7] | 799 | if(0) |
---|
[440ba20] | 800 | show_yap_db("DEBUG:calling within _query_with_aspect"); |
---|
[da5afdf] | 801 | |
---|
[646e57e] | 802 | char *whom=NULL; |
---|
| 803 | PROLOG(whom=abac_aspect_principal_name(head);); |
---|
[8bd77b5] | 804 | |
---|
[da5afdf] | 805 | /* could be obj or principal */ |
---|
[646e57e] | 806 | char *who=NULL; |
---|
[8bd77b5] | 807 | if(abac_aspect_is_object(tail)) { |
---|
[646e57e] | 808 | who=abac_aspect_object_name(tail); |
---|
[da5afdf] | 809 | } else { |
---|
[646e57e] | 810 | PROLOG(who=abac_aspect_principal_name(tail);); |
---|
[da5afdf] | 811 | } |
---|
| 812 | |
---|
[8bd77b5] | 813 | if(abac_aspect_aspect_name(tail)!=NULL) { |
---|
| 814 | printf("fail, a.o <- b.o and a.r <- a.r query is not implemented yet !!!\n"); |
---|
[da5afdf] | 815 | YAP_Exit(1); |
---|
| 816 | } |
---|
| 817 | |
---|
[646e57e] | 818 | if (who == NULL || whom == NULL) { |
---|
[8bd77b5] | 819 | printf("fail, query's call got bad aspect names .. \n"); |
---|
[da5afdf] | 820 | YAP_Exit(1); |
---|
| 821 | } |
---|
| 822 | |
---|
[2485307] | 823 | if(debug) fprintf(stderr,"printing up the yap query ..\n"); |
---|
[d037f54] | 824 | |
---|
| 825 | char *pstring; |
---|
| 826 | PROLOG(pstring=abac_aspect_aspect_param_string(head);); |
---|
| 827 | |
---|
[646e57e] | 828 | char *aspect=abac_aspect_type_string(head); |
---|
| 829 | int pcnt=abac_aspect_aspect_param_cnt(head); |
---|
| 830 | char *what=abac_aspect_aspect_name(head); |
---|
| 831 | |
---|
| 832 | _reset_pl(pl, who, what, whom, aspect, pstring, pcnt); |
---|
| 833 | |
---|
| 834 | abac_list_t *rlist=NULL; |
---|
| 835 | if(pcnt) |
---|
| 836 | rlist=_make_yap_query(pl,who,whom,aspect,abac_aspect_aspect_name(head),pstring,pcnt); |
---|
| 837 | else |
---|
| 838 | rlist=_make_yap_query(pl,who,whom,aspect,abac_aspect_aspect_name(head),NULL,0); |
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[da5afdf] | 839 | |
---|
[abf8d5d] | 840 | /* generate the resulting stack from a list */ |
---|
| 841 | ret=_make_cred_stack(rlist); |
---|
[646e57e] | 842 | if(tmp) free(tmp); |
---|
| 843 | if(pstring) free(pstring); |
---|
[da5afdf] | 844 | return ret; |
---|
| 845 | } |
---|
| 846 | |
---|
| 847 | /** |
---|
| 848 | * Get all the credentials (attribute/issuer cert pairs) from prolog |
---|
| 849 | * (which returns in string form) |
---|
| 850 | */ |
---|
| 851 | abac_stack_t *abac_pl_credentials(abac_pl_t *pl) |
---|
| 852 | { |
---|
[8bd77b5] | 853 | abac_stack_t *ret=abac_verifier_dump_creds(); |
---|
[da5afdf] | 854 | return ret; |
---|
| 855 | } |
---|
| 856 | |
---|
[5110d42] | 857 | abac_stack_t *abac_pl_principals(abac_pl_t *pl) |
---|
| 858 | { |
---|
| 859 | abac_stack_t *ret=abac_verifier_dump_principals(); |
---|
| 860 | return ret; |
---|
| 861 | } |
---|
| 862 | |
---|
[e95d652] | 863 | /** |
---|
| 864 | * Make a query into prolog db |
---|
| 865 | --role acme.preferred_customer --principal coyote |
---|
| 866 | --role acme.prefer_customer.buy_rockets --principlal coyote |
---|
[da5afdf] | 867 | --oset acme.rockets -- object mrx-21 |
---|
| 868 | --oset acme.villans -- principal coyote |
---|
[e95d652] | 869 | */ |
---|
[da5afdf] | 870 | abac_stack_t *abac_pl_query(abac_pl_t *pl, char *roleoset, char *prinobj) |
---|
[e95d652] | 871 | { |
---|
[202a7f9] | 872 | abac_stack_t *ret=NULL; |
---|
[da5afdf] | 873 | int len=strlen(roleoset)+strlen(prinobj)+5; |
---|
| 874 | char* attr_string=(char *) abac_xmalloc(sizeof(char)*len); |
---|
| 875 | sprintf(attr_string,"%s<-%s", roleoset, prinobj); |
---|
| 876 | |
---|
| 877 | if(debug) |
---|
[2485307] | 878 | fprintf(stderr,"abac_pl_query, query string is (%s)\n",attr_string); |
---|
[e95d652] | 879 | |
---|
[da5afdf] | 880 | /* call into yacc parser */ |
---|
| 881 | abac_reset_yyfptr(attr_string); |
---|
[b5a3da4] | 882 | abac_yy_init(); |
---|
[da5afdf] | 883 | int rc=yyparse(); |
---|
| 884 | if (rc) { |
---|
| 885 | free(attr_string); |
---|
[e95d652] | 886 | return NULL; |
---|
| 887 | } |
---|
| 888 | |
---|
[8bd77b5] | 889 | abac_aspect_t *head_aspect = abac_yy_get_rule_head_aspect(); |
---|
| 890 | abac_aspect_t *tail_aspect = abac_yy_get_rule_tail_aspect(); |
---|
[2efdff5] | 891 | |
---|
[8bd77b5] | 892 | ret=_query_with_aspect(pl,head_aspect,tail_aspect); |
---|
| 893 | |
---|
[e95d652] | 894 | return ret; |
---|
| 895 | } |
---|
| 896 | |
---|
[d9c3886] | 897 | abac_stack_t *abac_pl_query_with_structure(abac_pl_t *pl, abac_aspect_t *head_aspect, abac_aspect_t *tail_aspect) |
---|
| 898 | { |
---|
| 899 | abac_stack_t *ret=NULL; |
---|
| 900 | ret=_query_with_aspect(pl,head_aspect,tail_aspect); |
---|
| 901 | |
---|
| 902 | return ret; |
---|
| 903 | } |
---|