[e95d652] | 1 | |
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| 2 | |
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| 3 | /* bison grammar rules for process old rt0 statements */ |
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| 4 | /* |
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| 5 | isi.employee <- ted |
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| 6 | ted.friend <- mike |
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| 7 | usc.employee <- isi.employee |
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| 8 | usc.playground <- usc.employee.friend |
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| 9 | query, |
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| 10 | usc.playground <- ?Z |
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| 11 | isi.playground <- mike |
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| 12 | */ |
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| 13 | |
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| 14 | %{ |
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| 15 | /* C declarations */ |
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| 16 | #include <stdio.h> |
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| 17 | #include <string.h> |
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| 18 | #include <abac_stack.h> |
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| 19 | |
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| 20 | extern char *abac_cn_with_sha(char*); |
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| 21 | |
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| 22 | FILE *abac_yyin = NULL; |
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| 23 | FILE *abac_yyout = NULL; |
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| 24 | char *abac_yap_clause = NULL; |
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| 25 | char *abac_yyfptr = NULL; |
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[53e540d] | 26 | /* index to generate, C1,C2 .. */ |
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| 27 | int cred_count = 0; |
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[e95d652] | 28 | |
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| 29 | int sz_overhead = 0; |
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| 30 | |
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[53e540d] | 31 | char *compose_cred_list(); |
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| 32 | int get_next_cred_idx(); |
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| 33 | |
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[e95d652] | 34 | %} |
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| 35 | /* Bison declarations */ |
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| 36 | %union { |
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| 37 | int number; |
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| 38 | char *string; /* For returning char strings */ |
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| 39 | } |
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[53e540d] | 40 | %type <string> keypart rolepart left right term stmt |
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[e95d652] | 41 | |
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| 42 | %token <string> IDEN /* keyname or rolename */ |
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| 43 | |
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| 44 | %token <operator> DERIVE "<-" |
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| 45 | %token <operator> DOT "." |
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[53e540d] | 46 | %token <operator> AND "&" |
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[e95d652] | 47 | |
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| 48 | %% |
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| 49 | /* Grammar rules */ |
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| 50 | |
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| 51 | input: /* empty */ |
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| 52 | { } |
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| 53 | | stmt |
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| 54 | { fprintf (abac_yyout,"stmt (%s)\n", $1); |
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| 55 | abac_yap_clause = $1; |
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| 56 | } |
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| 57 | |
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| 58 | stmt : left DERIVE right |
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| 59 | { int sz; |
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| 60 | char *ptr=strstr($3,"role("); |
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| 61 | char *tmp; |
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| 62 | if(ptr==NULL) { |
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| 63 | sz=strlen($3)+strlen($1)+sz_overhead; |
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| 64 | tmp=(char *)abac_xmalloc(sz); |
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| 65 | sprintf(tmp,"isMember(%s,%s,['%s'])",$3,$1,abac_yyfptr); |
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| 66 | } else { |
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| 67 | sz=strlen($3)+strlen($1)+sz_overhead; |
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| 68 | tmp=(char *)abac_xmalloc(sz); |
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[53e540d] | 69 | if (cred_count==0) { |
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[e95d652] | 70 | sprintf(tmp,"isMember(X,%s,['%s']):-%s", |
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| 71 | $1, abac_yyfptr, $3); |
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| 72 | } else { |
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[53e540d] | 73 | char *tmp_cred_list=compose_cred_list(); |
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| 74 | sprintf(tmp,"isMember(X,%s,L):-%s, appendL([['%s'],%s],L)", |
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| 75 | $1, $3, abac_yyfptr, tmp_cred_list); |
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[e95d652] | 76 | free(tmp_cred_list); |
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[53e540d] | 77 | cred_count=0; |
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[e95d652] | 78 | } |
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| 79 | } |
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| 80 | $$=tmp; |
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| 81 | free($3);free($1); |
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| 82 | } |
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| 83 | |
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| 84 | left : keypart DOT rolepart |
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| 85 | { |
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| 86 | int sz=strlen($1)+strlen($3)+sz_overhead; |
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| 87 | char *tmp=(char *)abac_xmalloc(sz); |
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| 88 | sprintf(tmp,"role(%s,%s)", $1, $3); |
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| 89 | $$=tmp; |
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| 90 | free($3);free($1); |
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| 91 | } |
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| 92 | /* isi */ |
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| 93 | keypart : IDEN |
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| 94 | { |
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| 95 | char *cn=abac_cn_with_sha($1); |
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| 96 | $$=strdup(cn); |
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| 97 | } |
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| 98 | |
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| 99 | /* friend */ |
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| 100 | rolepart : IDEN |
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| 101 | { $$=strdup($1); } |
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| 102 | |
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[53e540d] | 103 | right : term |
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| 104 | { $$=$1; } |
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| 105 | | term AND right |
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| 106 | { |
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| 107 | int sz=strlen($1)+strlen($3)+2; |
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| 108 | char *tmp=(char *)abac_xmalloc(sz); |
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| 109 | sprintf(tmp,"%s,%s",$1,$3); |
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| 110 | $$=tmp; |
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| 111 | free($1);free($3); |
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| 112 | } |
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| 113 | |
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| 114 | term : keypart DOT IDEN DOT IDEN |
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[e95d652] | 115 | { |
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| 116 | int sz=strlen($1)+strlen($3)+strlen($5)+sz_overhead; |
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| 117 | char *tmp=(char *)abac_xmalloc(sz); |
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[53e540d] | 118 | int fst=get_next_cred_idx(); |
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| 119 | int snd=get_next_cred_idx(); |
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| 120 | sprintf(tmp,"isMember(Y,role(%s,%s),C%d),isMember(X,role(Y,%s),C%d)",$1,$3,fst,$5,snd); |
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[e95d652] | 121 | $$=tmp; |
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| 122 | free($1);free($3);free($5); |
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| 123 | } |
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| 124 | | keypart DOT IDEN |
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| 125 | { |
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| 126 | int sz=strlen($1)+strlen($3)+sz_overhead; |
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[53e540d] | 127 | int fst=get_next_cred_idx(); |
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[e95d652] | 128 | char *tmp=(char *)abac_xmalloc(sz); |
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[53e540d] | 129 | sprintf(tmp,"isMember(X,role(%s,%s),C%d)", $1, $3, fst); |
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[e95d652] | 130 | $$=tmp; |
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| 131 | free($1);free($3); |
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| 132 | } |
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| 133 | | keypart |
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| 134 | { |
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| 135 | $$=$1; |
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| 136 | } |
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| 137 | |
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| 138 | %% |
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| 139 | #include "abac_rt0.h" |
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| 140 | |
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| 141 | /* Additional C code */ |
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| 142 | int yywrap() |
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| 143 | { |
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| 144 | /* exit when done lexing the current input */ |
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| 145 | return 1; |
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| 146 | } |
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| 147 | |
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| 148 | int yyerror (char *s) |
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| 149 | { |
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| 150 | fprintf (abac_yyout,"yyerror: %s\n", s); |
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| 151 | } |
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| 152 | |
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| 153 | /* setting defaults */ |
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| 154 | void abac_yyinit() |
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| 155 | { |
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| 156 | abac_yyin=abac_get_yyin(); |
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| 157 | abac_yyout=abac_get_yyout(); |
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| 158 | abac_yyfptr = abac_get_yyfptr(); |
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| 159 | sz_overhead = strlen(abac_yyfptr)+2000; |
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| 160 | } |
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| 161 | |
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| 162 | char *abac_get_yap_clause() |
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| 163 | { |
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| 164 | return abac_yap_clause; |
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| 165 | } |
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| 166 | |
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| 167 | char *abac_free_yap_clause() |
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| 168 | { |
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| 169 | if (abac_yap_clause != NULL) |
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| 170 | free(abac_yap_clause); |
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| 171 | } |
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[53e540d] | 172 | |
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| 173 | int get_next_cred_idx() |
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| 174 | { |
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| 175 | printf("ZZZ count it once..%d\n", cred_count); |
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| 176 | cred_count++; |
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| 177 | return cred_count; |
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| 178 | } |
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| 179 | |
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| 180 | int get_curr_cred_idx() |
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| 181 | { |
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| 182 | return cred_count; |
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| 183 | } |
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| 184 | |
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| 185 | /* remember to free the returned string */ |
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| 186 | char *compose_cred_list() |
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| 187 | { |
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| 188 | int i=cred_count;; |
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| 189 | if(cred_count==0) return ""; |
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| 190 | |
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| 191 | char *clist=(char *)abac_xmalloc(sizeof(char)*(cred_count)*3); |
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| 192 | strcpy(clist,"C1"); |
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| 193 | if (cred_count==1) return clist; |
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| 194 | |
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| 195 | i=1; |
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| 196 | while(i!=cred_count) { |
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| 197 | i++; |
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| 198 | sprintf(clist,"%s,C%d",clist,i); |
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| 199 | } |
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| 200 | return clist; |
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| 201 | } |
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