[94605f2] | 1 | /* abac_keyid_map.c */ |
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| 2 | |
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| 3 | |
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| 4 | #include "abac.h" |
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| 5 | #include "abac_util.h" |
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| 6 | #include "uthash.h" |
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| 7 | |
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| 8 | struct abac_keyid_mapping_t { |
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| 9 | char *key; |
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| 10 | char *value; |
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| 11 | UT_hash_handle hh; |
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| 12 | }; |
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| 13 | |
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| 14 | struct abac_keyid_map_t { |
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| 15 | abac_keyid_mapping_t *keys; |
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| 16 | abac_keyid_mapping_t *nicknames; |
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[d2b198c] | 17 | int refcount; |
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[94605f2] | 18 | }; |
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| 19 | |
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| 20 | abac_keyid_mapping_t *abac_keyid_mapping_new(char *k, char *v) { |
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| 21 | abac_keyid_mapping_t *m = NULL; |
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| 22 | |
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| 23 | if ( !k || ! v) return NULL; |
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| 24 | m = abac_xmalloc(sizeof(abac_keyid_mapping_t)); |
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| 25 | m->key = abac_xstrdup(k); |
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| 26 | m->value = abac_xstrdup(v); |
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| 27 | |
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| 28 | return m; |
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| 29 | } |
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| 30 | |
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| 31 | void abac_keyid_mapping_free(abac_keyid_mapping_t *m) { |
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| 32 | if ( m->key ) free(m->key); |
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| 33 | if ( m->value ) free(m->value); |
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| 34 | free(m); |
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| 35 | } |
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| 36 | |
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| 37 | abac_keyid_map_t *abac_keyid_map_new() { |
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| 38 | abac_keyid_map_t *m = abac_xmalloc(sizeof(abac_keyid_map_t)); |
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| 39 | |
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| 40 | m->keys = NULL; |
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| 41 | m->nicknames = NULL; |
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[d2b198c] | 42 | m->refcount = 1; |
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[94605f2] | 43 | return m; |
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| 44 | } |
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| 45 | |
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[d2b198c] | 46 | /* Make a new, independent copy of the old keymap. */ |
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| 47 | abac_keyid_map_t *abac_keyid_map_clone(abac_keyid_map_t *old) { |
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[94605f2] | 48 | abac_keyid_map_t *m = abac_xmalloc(sizeof(abac_keyid_map_t)); |
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| 49 | abac_keyid_mapping_t *me = NULL; |
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| 50 | |
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| 51 | m->keys = NULL; |
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| 52 | m->nicknames = NULL; |
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[d2b198c] | 53 | m->refcount = 1; |
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[94605f2] | 54 | |
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| 55 | for ( me = old->keys; me ; me = me->hh.next) |
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| 56 | abac_keyid_map_add_nickname(m, me->key, me->value); |
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| 57 | |
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| 58 | return m; |
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| 59 | } |
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| 60 | |
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[d2b198c] | 61 | /* Add a reference to old and return it. */ |
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| 62 | abac_keyid_map_t *abac_keyid_map_dup(abac_keyid_map_t *old) { |
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| 63 | old->refcount ++; |
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| 64 | return old; |
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| 65 | } |
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| 66 | |
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[94605f2] | 67 | void abac_keyid_map_free(abac_keyid_map_t *m) { |
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| 68 | abac_keyid_mapping_t *me = NULL; |
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[d2b198c] | 69 | |
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| 70 | if ( --m->refcount > 0) return; |
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| 71 | |
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[94605f2] | 72 | while ( (me = m->keys) ) { |
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| 73 | HASH_DEL(m->keys, me); |
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| 74 | abac_keyid_mapping_free(me); |
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| 75 | } |
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| 76 | while ( (me = m->nicknames) ) { |
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| 77 | HASH_DEL(m->nicknames, me); |
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| 78 | abac_keyid_mapping_free(me); |
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| 79 | } |
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| 80 | free(m); |
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| 81 | } |
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| 82 | |
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| 83 | char *abac_keyid_map_key_to_nickname(abac_keyid_map_t *m, char *key) { |
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| 84 | abac_keyid_mapping_t *me = NULL; |
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| 85 | |
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[b7e77df] | 86 | if ( !key || !m) return 0; |
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[94605f2] | 87 | HASH_FIND_STR(m->keys, key, me); |
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| 88 | |
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[ebf0ae2] | 89 | if ( me ) return abac_xstrdup(me->value); |
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[94605f2] | 90 | else return NULL; |
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| 91 | } |
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| 92 | |
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| 93 | char *abac_keyid_map_nickname_to_key(abac_keyid_map_t *m, char *nick) { |
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| 94 | abac_keyid_mapping_t *me = NULL; |
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| 95 | |
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[b7e77df] | 96 | if ( !nick || !m ) return 0; |
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[94605f2] | 97 | HASH_FIND_STR(m->nicknames, nick, me); |
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| 98 | |
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[ebf0ae2] | 99 | if ( me ) return abac_xstrdup(me->value); |
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[94605f2] | 100 | else return NULL; |
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| 101 | } |
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| 102 | |
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| 103 | int abac_keyid_map_remove_keyid(abac_keyid_map_t *m, char *key) { |
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| 104 | abac_keyid_mapping_t *me = NULL; |
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| 105 | abac_keyid_mapping_t *nne = NULL; |
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| 106 | |
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| 107 | HASH_FIND_STR(m->keys, key, me); |
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| 108 | if ( !me ) return 0; |
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| 109 | HASH_FIND_STR(m->nicknames, me->value, nne); |
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| 110 | /* delete from keys */ |
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| 111 | HASH_DEL(m->keys, me); |
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| 112 | abac_keyid_mapping_free(me); |
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| 113 | /* If we found a nickname, delete that too */ |
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| 114 | if ( nne ) { |
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| 115 | HASH_DEL(m->nicknames, nne); |
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| 116 | abac_keyid_mapping_free(nne); |
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| 117 | } |
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| 118 | return 1; |
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| 119 | } |
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| 120 | |
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| 121 | |
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| 122 | int abac_keyid_map_add_nickname(abac_keyid_map_t *m, char *key, char *nick) { |
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| 123 | abac_keyid_mapping_t *me = NULL; |
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| 124 | char *name = NULL; |
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| 125 | int i =0; |
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| 126 | |
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| 127 | if ( !key || !nick) return 0; |
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| 128 | if (abac_keyid_map_key_to_nickname(m, key)) return 0; |
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| 129 | |
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| 130 | if ( !(name = abac_xmalloc(strlen(nick)+10))) return 0; |
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| 131 | sprintf(name, "%s", nick); |
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| 132 | |
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| 133 | while (abac_keyid_map_nickname_to_key(m, name) && i < 1000) |
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| 134 | sprintf(name, "%s%05d", nick, i++); |
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| 135 | |
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| 136 | if ( i < 1000 ) { |
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| 137 | me = abac_keyid_mapping_new(key, name); |
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| 138 | HASH_ADD_KEYPTR(hh, m->keys, me->key, strlen(me->key), me); |
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| 139 | me = abac_keyid_mapping_new(name, key); |
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| 140 | HASH_ADD_KEYPTR(hh, m->nicknames, me->key, strlen(me->key), me); |
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| 141 | } |
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| 142 | free(name); |
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| 143 | return 1; |
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| 144 | } |
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| 145 | |
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[d2b198c] | 146 | void abac_keyid_map_merge(abac_keyid_map_t *dest, abac_keyid_map_t *src, |
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| 147 | int overwrite) { |
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| 148 | abac_keyid_mapping_t *me = NULL; |
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| 149 | if ( !dest || !src ) return; |
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| 150 | |
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| 151 | for (me = src->keys; me; me = me->hh.next) { |
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| 152 | char *n = abac_keyid_map_key_to_nickname(dest, me->key); |
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| 153 | if ( n ) { |
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| 154 | free(n); |
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| 155 | if ( overwrite) { |
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| 156 | abac_keyid_map_remove_keyid(dest,me->key); |
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| 157 | abac_keyid_map_add_nickname(dest, me->key, me->value); |
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| 158 | } |
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| 159 | } else { |
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| 160 | abac_keyid_map_add_nickname(dest, me->key, me->value); |
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| 161 | } |
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| 162 | } |
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| 163 | } |
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| 164 | |
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[94605f2] | 165 | static int is_sep(char *c) { |
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| 166 | switch (*c) { |
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| 167 | case ' ': |
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| 168 | case '_': |
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| 169 | case '.': |
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| 170 | return 1; |
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| 171 | default: |
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| 172 | return 0; |
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| 173 | } |
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| 174 | } |
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| 175 | |
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| 176 | static char *abac_keyid_map_replace(abac_keyid_map_t *m, char *s, |
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| 177 | char *(*lookup)(abac_keyid_map_t *, char *)) { |
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| 178 | int lim = strlen(s); |
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| 179 | int i; |
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| 180 | int sz = 0; |
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| 181 | char *rv = NULL; |
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| 182 | char *start = s; |
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| 183 | char old = '\0'; |
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| 184 | char *repl = NULL; |
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| 185 | char *newrv = NULL; |
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| 186 | int newlen = 0; |
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| 187 | |
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| 188 | for ( i = 0; i < lim; i++ ) { |
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| 189 | if ( is_sep(s+i) ) { |
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| 190 | old = s[i]; |
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| 191 | s[i] = '\0'; |
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| 192 | |
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| 193 | if ( !(repl = lookup(m, start)) ) repl = start; |
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| 194 | |
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| 195 | newlen = strlen(repl)+1; |
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| 196 | |
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| 197 | if ( !(newrv = realloc(rv, sz + newlen +1)) ) { |
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| 198 | if ( rv ) free(rv); |
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| 199 | return NULL; |
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| 200 | } else { |
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| 201 | rv = newrv; |
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| 202 | if (sz == 0 ) |
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| 203 | rv[0] = '\0'; |
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| 204 | sz += newlen; |
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| 205 | } |
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| 206 | strncat(rv, repl, newlen); |
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| 207 | rv[sz-1] = old; |
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| 208 | rv[sz] = '\0'; |
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| 209 | s[i] = old; |
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| 210 | start = s+i+1; |
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| 211 | } |
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| 212 | } |
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| 213 | if ( start != s+i ) { |
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| 214 | if ( !(repl = lookup(m, start)) ) repl = start; |
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| 215 | |
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| 216 | newlen = strlen(repl); |
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| 217 | |
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| 218 | if ( !(newrv = realloc(rv, sz + newlen)) ) { |
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| 219 | if ( rv ) free(rv); |
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| 220 | return NULL; |
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| 221 | } else { |
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| 222 | rv = newrv; |
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| 223 | if ( sz == 0) |
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| 224 | rv[0] = '\0'; |
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| 225 | sz += newlen; |
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| 226 | } |
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| 227 | strncat(rv, repl, newlen); |
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| 228 | } |
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| 229 | return rv; |
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| 230 | } |
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| 231 | |
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| 232 | char *abac_keyid_map_expand_key(abac_keyid_map_t *m, char *s) { |
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| 233 | return abac_keyid_map_replace(m , s, abac_keyid_map_key_to_nickname); |
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| 234 | } |
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| 235 | |
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| 236 | char *abac_keyid_map_expand_nickname(abac_keyid_map_t *m, char *s) { |
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| 237 | return abac_keyid_map_replace(m , s, abac_keyid_map_nickname_to_key); |
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| 238 | } |
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