[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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| 26 | char *tmp_cred_list = NULL; |
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| 27 | |
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| 28 | int sz_overhead = 0; |
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| 29 | |
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| 30 | %} |
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| 31 | /* Bison declarations */ |
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| 32 | %union { |
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| 33 | int number; |
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| 34 | char *string; /* For returning char strings */ |
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| 35 | } |
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| 36 | %type <string> keypart rolepart left right stmt |
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| 37 | |
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| 38 | %token <string> IDEN /* keyname or rolename */ |
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| 39 | |
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| 40 | %token <operator> DERIVE "<-" |
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| 41 | %token <operator> DOT "." |
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| 42 | |
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| 43 | %% |
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| 44 | /* Grammar rules */ |
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| 45 | |
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| 46 | input: /* empty */ |
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| 47 | { } |
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| 48 | | stmt |
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| 49 | { fprintf (abac_yyout,"stmt (%s)\n", $1); |
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| 50 | abac_yap_clause = $1; |
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| 51 | } |
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| 52 | |
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| 53 | stmt : left DERIVE right |
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| 54 | { int sz; |
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| 55 | char *ptr=strstr($3,"role("); |
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| 56 | char *tmp; |
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| 57 | if(ptr==NULL) { |
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| 58 | sz=strlen($3)+strlen($1)+sz_overhead; |
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| 59 | tmp=(char *)abac_xmalloc(sz); |
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| 60 | printf("before.. (%s)\n", $3); |
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| 61 | sprintf(tmp,"isMember(%s,%s,['%s'])",$3,$1,abac_yyfptr); |
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| 62 | printf("after.. (%s)\n", tmp); |
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| 63 | } else { |
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| 64 | sz=strlen($3)+strlen($1)+sz_overhead; |
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| 65 | tmp=(char *)abac_xmalloc(sz); |
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| 66 | if (tmp_cred_list==NULL) { |
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| 67 | sprintf(tmp,"isMember(X,%s,['%s']):-%s", |
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| 68 | $1, abac_yyfptr, $3); |
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| 69 | } else { |
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| 70 | sprintf(tmp,"isMember(X,%s,['%s',%s]):-%s", |
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| 71 | $1, abac_yyfptr, tmp_cred_list, $3); |
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| 72 | free(tmp_cred_list); |
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| 73 | tmp_cred_list=NULL; |
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| 74 | } |
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| 75 | } |
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| 76 | $$=tmp; |
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| 77 | free($3);free($1); |
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| 78 | } |
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| 79 | |
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| 80 | left : keypart DOT rolepart |
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| 81 | { |
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| 82 | int sz=strlen($1)+strlen($3)+sz_overhead; |
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| 83 | char *tmp=(char *)abac_xmalloc(sz); |
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| 84 | sprintf(tmp,"role(%s,%s)", $1, $3); |
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| 85 | $$=tmp; |
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| 86 | free($3);free($1); |
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| 87 | } |
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| 88 | /* isi */ |
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| 89 | keypart : IDEN |
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| 90 | { |
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| 91 | char *cn=abac_cn_with_sha($1); |
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| 92 | $$=strdup(cn); |
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| 93 | } |
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| 94 | |
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| 95 | /* friend */ |
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| 96 | rolepart : IDEN |
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| 97 | { $$=strdup($1); } |
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| 98 | |
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| 99 | right : keypart DOT IDEN DOT IDEN |
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| 100 | { |
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| 101 | int sz=strlen($1)+strlen($3)+strlen($5)+sz_overhead; |
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| 102 | char *tmp=(char *)abac_xmalloc(sz); |
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| 103 | sprintf(tmp,"isMember(Y,role(%s,%s),[C1]),isMember(X,role(Y,%s),[C2])",$1,$3,$5); |
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| 104 | tmp_cred_list = strdup("C1,C2"); |
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| 105 | $$=tmp; |
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| 106 | free($1);free($3);free($5); |
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| 107 | } |
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| 108 | | keypart DOT IDEN |
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| 109 | { |
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| 110 | int sz=strlen($1)+strlen($3)+sz_overhead; |
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| 111 | char *tmp=(char *)abac_xmalloc(sz); |
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| 112 | sprintf(tmp,"isMember(X,role(%s,%s),[C1])", $1, $3); |
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| 113 | tmp_cred_list = strdup("C1"); |
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| 114 | $$=tmp; |
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| 115 | free($1);free($3); |
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| 116 | } |
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| 117 | | keypart |
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| 118 | { |
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| 119 | $$=$1; |
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| 120 | } |
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| 121 | |
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| 122 | %% |
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| 123 | #include "abac_rt0.h" |
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| 124 | |
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| 125 | /* Additional C code */ |
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| 126 | int yywrap() |
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| 127 | { |
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| 128 | /* exit when done lexing the current input */ |
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| 129 | return 1; |
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| 130 | } |
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| 131 | |
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| 132 | int yyerror (char *s) |
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| 133 | { |
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| 134 | fprintf (abac_yyout,"yyerror: %s\n", s); |
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| 135 | } |
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| 136 | |
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| 137 | /* setting defaults */ |
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| 138 | void abac_yyinit() |
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| 139 | { |
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| 140 | abac_yyin=abac_get_yyin(); |
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| 141 | abac_yyout=abac_get_yyout(); |
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| 142 | abac_yyfptr = abac_get_yyfptr(); |
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| 143 | sz_overhead = strlen(abac_yyfptr)+2000; |
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| 144 | } |
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| 145 | |
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| 146 | char *abac_get_yap_clause() |
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| 147 | { |
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| 148 | return abac_yap_clause; |
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| 149 | } |
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| 150 | |
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| 151 | char *abac_free_yap_clause() |
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| 152 | { |
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| 153 | if (abac_yap_clause != NULL) |
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| 154 | free(abac_yap_clause); |
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| 155 | } |
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