[b5a3da4] | 1 | #include <assert.h> |
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| 2 | #include <stdlib.h> |
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| 3 | #include <stdio.h> |
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| 4 | #include <string.h> |
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| 5 | |
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| 6 | #include "abac_list.h" |
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| 7 | #include "abac_util.h" |
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| 8 | |
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| 9 | #include "abac_pl.h" |
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| 10 | |
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| 11 | static int debug=0; |
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| 12 | /* |
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| 13 | A.oset <- B |
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| 14 | A.oset <- Obj |
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| 15 | A.oset <- B.oset |
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| 16 | A.oset <- B.role.oset |
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| 17 | */ |
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| 18 | struct _abac_oset_t { |
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| 19 | int is_object; |
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| 20 | union { |
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| 21 | char *principal_name; |
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| 22 | abac_term_t *principal_object; |
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| 23 | }; |
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| 24 | |
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| 25 | char *linked_role_name; |
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| 26 | abac_param_list_t *linked_role_params; |
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| 27 | |
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| 28 | char *oset_name; |
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| 29 | abac_param_list_t *oset_params; |
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| 30 | |
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| 31 | char *string; |
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| 32 | char *linked; |
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| 33 | |
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| 34 | abac_list_t *prereqs; |
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| 35 | int refcount; |
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| 36 | }; |
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| 37 | |
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| 38 | extern char *abac_cn_with_sha(char*); |
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| 39 | char *abac_oset_string_with_condition(abac_oset_t *); |
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| 40 | char *abac_oset_principal_cn(abac_oset_t *); |
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| 41 | |
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| 42 | int abac_oset_is_object(abac_oset_t *ptr) |
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| 43 | { |
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| 44 | return ptr->is_object; |
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| 45 | } |
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| 46 | |
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| 47 | /** |
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| 48 | * Create a new principal and initialize it. |
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| 49 | */ |
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| 50 | abac_oset_t *abac_oset_principal_new(char *principal) { |
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| 51 | assert(principal != NULL); |
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| 52 | |
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| 53 | if (strlen(principal) == 0) |
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| 54 | return NULL; |
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| 55 | |
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| 56 | abac_oset_t *oset = (abac_oset_t *) abac_xmalloc(sizeof(abac_oset_t)); |
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| 57 | |
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| 58 | oset->is_object =0; |
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| 59 | oset->principal_name = abac_xstrdup(principal); |
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| 60 | oset->oset_name = NULL; |
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| 61 | oset->oset_params = NULL; |
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| 62 | |
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| 63 | oset->linked_role_name = NULL; |
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| 64 | oset->linked_role_params = NULL; |
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| 65 | |
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| 66 | oset->string = abac_xstrdup(principal); |
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| 67 | oset->linked = NULL; |
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| 68 | oset->prereqs = NULL; |
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| 69 | |
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| 70 | oset->refcount = 1; |
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| 71 | |
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| 72 | return oset; |
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| 73 | } |
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| 74 | |
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| 75 | abac_oset_t *abac_oset_object_new(abac_term_t *object) { |
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| 76 | assert(object != NULL); |
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| 77 | |
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| 78 | abac_oset_t *oset = (abac_oset_t *) abac_xmalloc(sizeof(abac_oset_t)); |
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| 79 | |
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| 80 | oset->is_object =1; |
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| 81 | oset->principal_object = object; |
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| 82 | oset->oset_name = NULL; |
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| 83 | oset->oset_params = NULL; |
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| 84 | |
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| 85 | oset->linked_role_name = NULL; |
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| 86 | oset->linked_role_params = NULL; |
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| 87 | |
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| 88 | oset->string = strdup(abac_term_name(object)); |
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| 89 | oset->linked = NULL; |
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| 90 | oset->prereqs = NULL; |
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| 91 | |
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| 92 | oset->refcount = 1; |
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| 93 | |
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| 94 | return oset; |
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| 95 | } |
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| 96 | |
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| 97 | /** |
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| 98 | * Create a new oset and initialize it. |
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| 99 | */ |
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| 100 | abac_oset_t *abac_oset_oset_new(char *principal_name, char *oset_name) { |
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| 101 | assert(principal_name != NULL); |
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| 102 | assert(oset_name != NULL); |
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| 103 | |
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| 104 | abac_oset_t *oset; |
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| 105 | |
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| 106 | if (strlen(principal_name) == 0 || strlen(oset_name) == 0) |
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| 107 | return NULL; |
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| 108 | |
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| 109 | /* MEI */ |
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| 110 | if(debug) |
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| 111 | printf("DEBUG:adding a new oset (%s) to principal (%s)\n", oset_name, principal_name); |
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| 112 | |
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| 113 | oset = abac_xmalloc(sizeof(abac_oset_t)); |
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| 114 | |
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| 115 | oset->is_object=0; |
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| 116 | oset->principal_name = abac_xstrdup(principal_name); |
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| 117 | oset->oset_name = abac_xstrdup(oset_name); |
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| 118 | oset->oset_params = NULL; |
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| 119 | |
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| 120 | oset->linked_role_name = NULL; |
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| 121 | oset->linked_role_params = NULL; |
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| 122 | |
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| 123 | int prin_len = strlen(principal_name); |
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| 124 | int oset_len = strlen(oset_name); |
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| 125 | |
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| 126 | oset->string = abac_xmalloc(prin_len + 1 + oset_len + 1); |
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| 127 | memcpy(oset->string, principal_name, prin_len); |
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| 128 | oset->string[prin_len] = '.'; |
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| 129 | memcpy(oset->string + prin_len + 1, oset_name, oset_len); |
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| 130 | oset->string[prin_len + 1 + oset_len] = 0; |
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| 131 | |
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| 132 | |
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| 133 | oset->linked = NULL; |
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| 134 | oset->prereqs = NULL; |
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| 135 | |
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| 136 | oset->refcount = 1; |
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| 137 | |
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| 138 | return oset; |
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| 139 | } |
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| 140 | |
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| 141 | /** |
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| 142 | * Created a new linking oset and initialize it. |
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| 143 | */ |
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| 144 | abac_oset_t *abac_oset_linking_new(char *principal_name, char *linked_role_name, char *oset_name) { |
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| 145 | assert(principal_name != NULL); |
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| 146 | assert(linked_role_name != NULL); |
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| 147 | assert(oset_name != NULL); |
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| 148 | |
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| 149 | abac_oset_t *oset; |
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| 150 | if (strlen(principal_name) == 0 || strlen(linked_role_name) == 0 || strlen(oset_name) == 0) |
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| 151 | return NULL; |
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| 152 | |
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| 153 | /* MEI */ |
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| 154 | if(debug) |
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| 155 | printf("DEBUG:adding a new linked (%s) to oset(%s) for principal(%s)\n", |
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| 156 | linked_role_name, oset_name, principal_name); |
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| 157 | |
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| 158 | oset = abac_xmalloc(sizeof(abac_oset_t)); |
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| 159 | |
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| 160 | oset->is_object=0; |
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| 161 | oset->principal_name = abac_xstrdup(principal_name); |
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| 162 | |
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| 163 | oset->linked_role_name = abac_xstrdup(linked_role_name); |
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| 164 | oset->linked_role_params = NULL; |
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| 165 | oset->oset_name = abac_xstrdup(oset_name); |
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| 166 | oset->oset_params = NULL; |
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| 167 | |
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| 168 | int prin_len = strlen(principal_name); |
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| 169 | int link_len = strlen(linked_role_name); |
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| 170 | int oset_len = strlen(oset_name); |
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| 171 | |
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| 172 | oset->string = abac_xmalloc(prin_len + 1 + link_len + 1 + oset_len + 1); |
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| 173 | |
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| 174 | memcpy(oset->string, principal_name, prin_len); |
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| 175 | oset->string[prin_len] = '.'; |
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| 176 | memcpy(oset->string + prin_len + 1, linked_role_name, link_len); |
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| 177 | oset->string[prin_len + 1 + link_len] = 0; |
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| 178 | |
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| 179 | // hack: linked role is first two parts of full string |
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| 180 | oset->linked = abac_xstrdup(oset->string); |
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| 181 | |
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| 182 | oset->string[prin_len + 1 + link_len] = '.'; |
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| 183 | memcpy(oset->string + prin_len + 1 + link_len + 1, oset_name, oset_len); |
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| 184 | oset->string[prin_len + 1 + link_len + 1 + oset_len] = 0; |
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| 185 | |
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| 186 | oset->prereqs = NULL; |
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| 187 | oset->refcount = 1; |
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| 188 | |
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| 189 | return oset; |
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| 190 | } |
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| 191 | |
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| 192 | /** |
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| 193 | * Create an intersection oset. |
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| 194 | */ |
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| 195 | abac_oset_t *abac_oset_intersection_new(char *name, abac_list_t *prereqs) { |
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| 196 | abac_oset_t *oset = abac_xmalloc(sizeof(abac_oset_t)); |
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| 197 | |
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| 198 | oset->principal_name = oset->linked_role_name = oset->oset_name = NULL; |
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| 199 | oset->linked_role_params = NULL; |
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| 200 | oset->oset_params = NULL; |
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| 201 | |
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| 202 | oset->linked = NULL; |
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| 203 | oset->string = abac_xstrdup(name); |
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| 204 | oset->prereqs = prereqs; |
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| 205 | |
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| 206 | oset->refcount = 1; |
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| 207 | |
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| 208 | return oset; |
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| 209 | } |
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| 210 | |
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| 211 | /** |
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| 212 | * Decrease a oset's reference count, freeing it when it reaches 0. |
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| 213 | */ |
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| 214 | void abac_oset_free(abac_oset_t *oset) { |
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| 215 | |
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| 216 | if(debug) |
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| 217 | printf("DEBUG:trying to freeing a oset %d\n",(int)oset); |
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| 218 | |
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| 219 | if (oset == NULL) |
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| 220 | return; |
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| 221 | |
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| 222 | if(debug) |
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| 223 | printf("DEBUG:freeing a oset %d\n",(int)oset); |
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| 224 | |
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| 225 | --oset->refcount; |
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| 226 | if (oset->refcount > 0) |
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| 227 | return; |
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| 228 | |
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| 229 | if(oset->principal_name) free(oset->principal_name); |
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| 230 | if(oset->linked_role_name) free(oset->linked_role_name); |
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| 231 | if(oset->oset_name) free(oset->oset_name); |
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| 232 | |
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| 233 | if(oset->string) free(oset->string); |
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| 234 | if(oset->linked) free(oset->linked); |
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| 235 | |
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| 236 | if (oset->oset_params != NULL) { |
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| 237 | abac_param_list_free(oset->oset_params); |
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| 238 | } |
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| 239 | |
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| 240 | if (oset->linked_role_params != NULL) { |
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| 241 | abac_param_list_free(oset->linked_role_params); |
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| 242 | } |
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| 243 | |
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| 244 | if (oset->prereqs != NULL) { |
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| 245 | abac_oset_t *cur; |
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| 246 | abac_list_foreach(oset->prereqs, cur, |
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| 247 | abac_oset_free(cur); |
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| 248 | ); |
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| 249 | abac_list_free(oset->prereqs); |
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| 250 | } |
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| 251 | |
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| 252 | free(oset); |
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| 253 | } |
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| 254 | |
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| 255 | abac_oset_t *abac_oset_oset_add_param(abac_oset_t *oset, abac_term_t *param) |
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| 256 | { |
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| 257 | if(oset->oset_params == NULL) { |
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| 258 | oset->oset_params=abac_param_list_new(param); |
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| 259 | } else { |
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| 260 | abac_param_list_add_term(oset->oset_params, param); |
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| 261 | } |
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| 262 | return oset; |
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| 263 | } |
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| 264 | |
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| 265 | abac_oset_t *abac_oset_add_intersecting_oset(abac_oset_t *oset, abac_oset_t *noset) |
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| 266 | { |
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| 267 | abac_list_add(oset->prereqs, noset); |
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| 268 | return oset; |
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| 269 | } |
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| 270 | |
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| 271 | abac_oset_t *abac_oset_oset_add_linked_param(abac_oset_t *oset, abac_term_t *param) |
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| 272 | { |
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| 273 | if(oset->linked_role_params == NULL) { |
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| 274 | oset->linked_role_params=abac_param_list_new(param); |
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| 275 | } else { |
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| 276 | abac_param_list_add_term(oset->linked_role_params, param); |
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| 277 | } |
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| 278 | return oset; |
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| 279 | } |
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| 280 | |
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| 281 | |
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| 282 | /** |
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| 283 | * Create a non-intersecting oset from a string. Handles principals, osets, |
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| 284 | * and linking osets. |
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| 285 | */ |
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| 286 | static abac_oset_t *_abac_single_oset_from_string(char *string) { |
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| 287 | int num_dots = 0; |
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| 288 | char *dot = string; |
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| 289 | abac_oset_t *ret = NULL; |
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| 290 | |
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| 291 | // count the dots |
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| 292 | while ((dot = strchr(dot, '.')) != NULL) { |
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| 293 | ++num_dots; |
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| 294 | ++dot; |
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| 295 | } |
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| 296 | |
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| 297 | // no dots: easy case, principal |
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| 298 | if (num_dots == 0) |
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| 299 | ret = abac_oset_principal_new(string); |
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| 300 | |
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| 301 | // a oset has exactly 1 dot |
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| 302 | else if (num_dots == 1) { |
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| 303 | char *principal = string; |
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| 304 | |
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| 305 | // terminate the principal part |
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| 306 | dot = strchr(principal, '.'); |
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| 307 | *dot = 0; |
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| 308 | |
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| 309 | // oset name comes after the dot |
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| 310 | char *oset_name = dot + 1; |
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| 311 | |
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| 312 | // create the oset (if possible) |
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| 313 | ret = abac_oset_oset_new(string, oset_name); |
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| 314 | } |
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| 315 | |
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| 316 | // a linked oset has 2 dots |
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| 317 | else if (num_dots == 2) { |
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| 318 | char *principal = string; |
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| 319 | |
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| 320 | // terminate the principal part |
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| 321 | dot = strchr(principal, '.'); |
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| 322 | *dot = 0; |
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| 323 | |
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| 324 | // linked name is next, terminate it |
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| 325 | char *linked = dot + 1; |
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| 326 | dot = strchr(linked, '.'); |
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| 327 | *dot = 0; |
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| 328 | |
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| 329 | // oset name is last, already terminated |
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| 330 | char *oset_name = dot + 1; |
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| 331 | |
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| 332 | ret = abac_oset_linking_new(principal, linked, oset_name); |
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| 333 | } |
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| 334 | |
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| 335 | // more than two dots: return NULL |
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| 336 | |
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| 337 | return ret; |
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| 338 | } |
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| 339 | |
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| 340 | /** |
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| 341 | * Create a oset from a string. Handles intersecting and normal osets. |
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| 342 | */ |
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| 343 | abac_oset_t *abac_oset_from_string(char *string) { |
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| 344 | abac_list_t *prereqs = NULL; |
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| 345 | abac_oset_t *ret = NULL, *oset; |
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| 346 | char *osets[256]; |
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| 347 | int num_osets, i; |
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| 348 | |
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| 349 | char *original = string; |
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| 350 | |
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| 351 | // make a copy so we can mess with it |
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| 352 | string = abac_xstrdup(string); |
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| 353 | |
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| 354 | // split the string (in case of an intersection num_osets > 1) |
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| 355 | abac_split(string, " & ", osets, &num_osets); |
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| 356 | |
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| 357 | // normal oset: |
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| 358 | if (num_osets == 1) |
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| 359 | ret = _abac_single_oset_from_string(string); |
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| 360 | |
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| 361 | else { |
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| 362 | prereqs = abac_list_new(); |
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| 363 | |
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| 364 | for (i = 0; i < num_osets; ++i) { |
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| 365 | // make sure the tail oset is valid |
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| 366 | oset = abac_oset_from_string(osets[i]); |
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| 367 | if (oset == NULL) |
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| 368 | goto error; |
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| 369 | |
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| 370 | abac_list_add(prereqs, oset); |
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| 371 | } |
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| 372 | ret = abac_oset_intersection_new(original, prereqs); |
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| 373 | } |
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| 374 | |
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| 375 | free(string); |
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| 376 | return ret; |
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| 377 | |
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| 378 | error: |
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| 379 | |
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| 380 | if (prereqs != NULL) { |
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| 381 | abac_oset_t *cur; |
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| 382 | abac_list_foreach(prereqs, cur, |
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| 383 | abac_oset_free(cur); |
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| 384 | ); |
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| 385 | abac_list_free(prereqs); |
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| 386 | } |
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| 387 | free(string); |
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| 388 | return NULL; |
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| 389 | } |
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| 390 | |
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| 391 | |
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| 392 | /** |
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| 393 | * Increase a oset's reference count. |
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| 394 | */ |
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| 395 | abac_oset_t *abac_oset_dup(abac_oset_t *oset) { |
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| 396 | assert(oset != NULL); |
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| 397 | |
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| 398 | ++oset->refcount; |
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| 399 | return oset; |
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| 400 | } |
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| 401 | |
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| 402 | /** |
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| 403 | * True if a oset is a principal. |
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| 404 | */ |
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| 405 | int abac_oset_is_principal(abac_oset_t *oset) { |
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| 406 | assert(oset != NULL); |
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| 407 | return oset->oset_name == NULL && oset->linked_role_name == NULL && oset->prereqs == NULL; |
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| 408 | } |
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| 409 | |
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| 410 | /** |
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| 411 | * True if a oset is a oset. |
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| 412 | */ |
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| 413 | int abac_oset_is_oset(abac_oset_t *oset) { |
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| 414 | assert(oset != NULL); |
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| 415 | return oset->oset_name != NULL && oset->linked_role_name == NULL && oset->prereqs == NULL; |
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| 416 | } |
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| 417 | |
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| 418 | /** |
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| 419 | * True if a oset is a linked oset. |
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| 420 | */ |
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| 421 | int abac_oset_is_linking(abac_oset_t *oset) { |
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| 422 | assert(oset != NULL); |
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| 423 | return oset->linked_role_name != NULL; |
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| 424 | } |
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| 425 | |
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| 426 | /** |
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| 427 | * True if a oset is an intersection. |
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| 428 | */ |
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| 429 | int abac_oset_is_intersection(abac_oset_t *oset) { |
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| 430 | assert(oset != NULL); |
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| 431 | return oset->prereqs != NULL; |
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| 432 | } |
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| 433 | |
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| 434 | char *abac_oset_intersecting_string_with_condition(abac_oset_t *oset) |
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| 435 | { |
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| 436 | assert(oset != NULL); |
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| 437 | char *tmp=NULL; |
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| 438 | if (oset->prereqs != NULL) { |
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| 439 | abac_oset_t *cur; |
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| 440 | abac_list_foreach(oset->prereqs, cur, |
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| 441 | char *ntmp=abac_oset_string_with_condition(cur); |
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| 442 | if(tmp==NULL) { |
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| 443 | asprintf(&tmp,"%s",ntmp); |
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| 444 | } else { |
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| 445 | asprintf(&tmp,"%s & %s",tmp, ntmp); |
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| 446 | } |
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| 447 | ); |
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| 448 | } |
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| 449 | return tmp; |
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| 450 | } |
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| 451 | /** |
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| 452 | * Returns the string representation of the oset. |
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| 453 | * principal.oset(params..) |
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| 454 | */ |
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| 455 | char *abac_oset_string_with_condition(abac_oset_t *oset) { |
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| 456 | assert(oset != NULL); |
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| 457 | |
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| 458 | if(abac_oset_is_intersection(oset)) { |
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| 459 | return abac_oset_intersecting_string_with_condition(oset); |
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| 460 | } |
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| 461 | |
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| 462 | char *tmp=NULL; |
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| 463 | /* use cn for now, easy to debug XXX */ |
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| 464 | char *principal_name; |
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| 465 | if(abac_oset_is_object(oset)) { |
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| 466 | principal_name = abac_oset_object_cn(oset); |
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| 467 | } else principal_name = abac_oset_principal_cn(oset); |
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| 468 | char *oset_name= oset->oset_name; |
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| 469 | char *linked_role_name = oset->linked_role_name; |
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| 470 | char *params_string=NULL; |
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| 471 | char *linked_params_string=NULL; |
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| 472 | |
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| 473 | int len = 0; |
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| 474 | if(principal_name) |
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| 475 | len=len+strlen(principal_name)+1; |
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| 476 | if(oset_name) |
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| 477 | len = len+strlen(oset_name)+1; |
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| 478 | if(linked_role_name) |
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| 479 | len = len+strlen(linked_role_name)+1; |
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| 480 | |
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| 481 | if(oset->oset_params) { |
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| 482 | params_string=abac_param_list_string_with_condition(oset->oset_params); |
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| 483 | len = len+strlen(params_string)+3; |
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| 484 | } |
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| 485 | if(oset->linked_role_params) { |
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| 486 | linked_params_string=abac_param_list_string_with_condition(oset->linked_role_params); |
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| 487 | len = len+strlen(linked_params_string)+3; |
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| 488 | } |
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| 489 | |
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| 490 | /* principal */ |
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| 491 | /* principal.oset */ |
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| 492 | /* principal.oset(params_string) */ |
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| 493 | /* principal.linked_role(linked_params_string).oset(params_string) */ |
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| 494 | tmp = abac_xmalloc(len); |
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| 495 | |
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| 496 | if(principal_name) |
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| 497 | sprintf(tmp,"%s",principal_name); |
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| 498 | |
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| 499 | if(linked_role_name) { |
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| 500 | strcat(tmp,"."); |
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| 501 | strcat(tmp,linked_role_name); |
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| 502 | } |
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| 503 | if(linked_params_string) { |
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| 504 | strcat(tmp,"("); |
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| 505 | strcat(tmp,linked_params_string); |
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| 506 | strcat(tmp,")"); |
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| 507 | } |
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| 508 | if(oset_name) { |
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| 509 | strcat(tmp,"."); |
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| 510 | strcat(tmp,oset_name); |
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| 511 | } |
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| 512 | if(params_string) { |
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| 513 | strcat(tmp,"("); |
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| 514 | strcat(tmp,params_string); |
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| 515 | strcat(tmp,")"); |
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| 516 | } |
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| 517 | |
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| 518 | if(linked_params_string) free(linked_params_string); |
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| 519 | if(params_string) free(params_string); |
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| 520 | return tmp; |
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| 521 | } |
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| 522 | |
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| 523 | void abac_print_oset_string_with_condition(abac_oset_t *oset,FILE *fp) |
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| 524 | { |
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| 525 | char *string=abac_oset_string_with_condition(oset); |
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| 526 | if(fp==NULL) |
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| 527 | printf("%s",string); |
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| 528 | else fprintf(fp,"%s",string); |
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| 529 | } |
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| 530 | |
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| 531 | /** |
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| 532 | * Returns the name of a oset. If the oset is A.r1 then return r1. If the oset |
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| 533 | * is A.r1.r2 then return r2. |
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| 534 | */ |
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| 535 | char *abac_oset_oset_name(abac_oset_t *oset) { |
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| 536 | assert(oset != NULL); |
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| 537 | return oset->oset_name; |
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| 538 | } |
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| 539 | |
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| 540 | char *abac_oset_oset_param_string(abac_oset_t *oset) { |
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| 541 | assert(oset != NULL); |
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| 542 | if(oset->oset_params) { |
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| 543 | return abac_param_list_string(oset->oset_params); |
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| 544 | } |
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| 545 | return NULL; |
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| 546 | } |
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| 547 | |
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| 548 | /** |
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| 549 | * Returns the linked part of a linking oset. For instance, if the oset is |
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| 550 | * A.r1.r2, this returns A.r1. |
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| 551 | */ |
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| 552 | char *abac_oset_linked_role(abac_oset_t *oset) { |
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| 553 | assert(oset != NULL); |
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| 554 | return oset->linked_role_name; |
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| 555 | } |
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| 556 | |
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| 557 | /** |
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| 558 | * Returns the principal part of a oset. The stuff before the first dot. |
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| 559 | */ |
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| 560 | char *abac_oset_principal(abac_oset_t *oset) { |
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| 561 | assert(oset != NULL); |
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| 562 | return oset->principal_name; |
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| 563 | } |
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| 564 | |
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| 565 | char *abac_oset_principal_cn(abac_oset_t *oset) { |
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| 566 | assert(oset != NULL); |
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| 567 | return abac_cn_with_sha(oset->principal_name); |
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| 568 | } |
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| 569 | |
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| 570 | char *abac_oset_object_cn(abac_oset_t *oset) { |
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| 571 | assert(oset != NULL && oset->is_object); |
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| 572 | abac_term_t *obj=oset->principal_object; |
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| 573 | return abac_term_name(obj); |
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| 574 | } |
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| 575 | |
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| 576 | abac_condition_t *abac_oset_object_constraint(abac_oset_t *oset) { |
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| 577 | assert(oset != NULL && oset->is_object); |
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| 578 | abac_term_t *obj=oset->principal_object; |
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| 579 | return abac_term_constraint(obj); |
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| 580 | } |
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| 581 | /** |
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| 582 | * Returns the prereqs of an intersection. |
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| 583 | */ |
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| 584 | abac_list_t *abac_oset_prereqs(abac_oset_t *oset) { |
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| 585 | assert(oset != NULL); |
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| 586 | return oset->prereqs; |
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| 587 | } |
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| 588 | |
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| 589 | abac_param_list_t *abac_oset_linked_role_params(abac_oset_t *oset) { |
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| 590 | assert(oset != NULL); |
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| 591 | return oset->linked_role_params; |
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| 592 | } |
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| 593 | |
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| 594 | abac_param_list_t *abac_oset_oset_params(abac_oset_t *oset) { |
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| 595 | assert(oset != NULL); |
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| 596 | return oset->oset_params; |
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| 597 | } |
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| 598 | |
---|
| 599 | |
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| 600 | /** |
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| 601 | * Build an attribute key from head and tail osets. Static. |
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| 602 | */ |
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| 603 | #define ROLE_SEPARATOR " <- " |
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| 604 | char *abac_oset_attr_key(abac_oset_t *head_oset, abac_oset_t *tail_oset) { |
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| 605 | char *head = abac_oset_string_with_condition(head_oset); |
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| 606 | int head_len = strlen(head); |
---|
| 607 | |
---|
| 608 | char *tail = abac_oset_string_with_condition(tail_oset); |
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| 609 | int tail_len = strlen(tail); |
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| 610 | |
---|
| 611 | int sep_len = sizeof(ROLE_SEPARATOR) - 1; |
---|
| 612 | |
---|
| 613 | // "head <- tail" |
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| 614 | char *ret = abac_xmalloc(head_len + tail_len + sep_len + 1); |
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| 615 | memcpy(ret, head, head_len); |
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| 616 | memcpy(ret + head_len, ROLE_SEPARATOR, sep_len); |
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| 617 | memcpy(ret + head_len + sep_len, tail, tail_len); |
---|
| 618 | ret[head_len + sep_len + tail_len] = 0; |
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| 619 | |
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| 620 | return ret; |
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| 621 | } |
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