1 | |
---|
2 | // include the GNU extension of asprintf |
---|
3 | #define _GNU_SOURCE |
---|
4 | |
---|
5 | #include <assert.h> |
---|
6 | #include <stdio.h> |
---|
7 | |
---|
8 | #include <library.h> |
---|
9 | #include <credentials/certificates/certificate.h> |
---|
10 | #include <credentials/certificates/x509.h> |
---|
11 | #include <credentials/certificates/ac.h> |
---|
12 | |
---|
13 | #include "abac_verifier.h" |
---|
14 | |
---|
15 | #include "abac_list.h" |
---|
16 | #include "abac_util.h" |
---|
17 | #include "abac_rt.h" |
---|
18 | |
---|
19 | extern abac_role_t *abac_get_yap_head_role(); |
---|
20 | extern abac_role_t *abac_get_yap_tail_role(); |
---|
21 | extern abac_list_t *abac_get_yap_clauses(); |
---|
22 | |
---|
23 | /* keeping this a fixed enum is to have tighter control of |
---|
24 | what are acceptabletypes of keyid are we allowing */ |
---|
25 | enum keyidtype { |
---|
26 | KEYID = 1 |
---|
27 | }; |
---|
28 | /* keyidname[keyidtype] */ |
---|
29 | static const char *const keyidname[] = |
---|
30 | { |
---|
31 | "badidtype", "keyid", 0 |
---|
32 | }; |
---|
33 | static int keyidname_cnt=1; |
---|
34 | |
---|
35 | enum dtermtype { |
---|
36 | INT = 1, |
---|
37 | URN = 2, |
---|
38 | FLOAT = 3, |
---|
39 | BOOLEAN = 4, |
---|
40 | STRING = 5, |
---|
41 | TIME = 6, |
---|
42 | PRINCIPAL = 7, |
---|
43 | ANONYMOUS = 8 |
---|
44 | }; |
---|
45 | /* dtermname[dtermtype] */ |
---|
46 | static const char *const dtermname[] = |
---|
47 | { |
---|
48 | "baddterm", "int", "urn", "float", "boolean", "string", "time" , "principal", "anonymous", 0 |
---|
49 | }; |
---|
50 | static int dtermname_cnt=8; |
---|
51 | |
---|
52 | struct _abac_id_cert_t { |
---|
53 | char *keyid; |
---|
54 | char *cn; |
---|
55 | int type; /* keyidtype */ |
---|
56 | certificate_t *cert; |
---|
57 | char *clause; |
---|
58 | |
---|
59 | UT_hash_handle hh; |
---|
60 | }; |
---|
61 | |
---|
62 | |
---|
63 | struct _abac_credential_t { |
---|
64 | abac_role_t *head; |
---|
65 | abac_role_t *tail; |
---|
66 | certificate_t *cert; |
---|
67 | certificate_t *issuer; |
---|
68 | abac_list_t *clauses; |
---|
69 | |
---|
70 | int refcount; |
---|
71 | }; |
---|
72 | |
---|
73 | typedef struct _abac_str_cred_t { |
---|
74 | char *strid; |
---|
75 | abac_credential_t *cred; |
---|
76 | |
---|
77 | UT_hash_handle hh; |
---|
78 | } abac_str_cred_t; |
---|
79 | |
---|
80 | abac_id_cert_t *id_certs = NULL; |
---|
81 | abac_str_cred_t *str_creds = NULL; |
---|
82 | |
---|
83 | static int debug=0; |
---|
84 | static void check_id_cert(abac_id_cert_t *id_cert); |
---|
85 | extern void abac_print_role_string_with_condition(abac_role_t *role); |
---|
86 | |
---|
87 | // |
---|
88 | void abac_print_cred_info(abac_credential_t *cred) |
---|
89 | { |
---|
90 | if(debug) { |
---|
91 | printf("---> printing out credential info cred(%d)..\n", (int) cred); |
---|
92 | if(cred->head) { |
---|
93 | printf(" head role(%d):\n",(int)cred->head); |
---|
94 | abac_print_role_string_with_condition(cred->head); |
---|
95 | } |
---|
96 | if(cred->tail) { |
---|
97 | printf(" tail role(%d):\n",(int)cred->tail); |
---|
98 | abac_print_role_string_with_condition(cred->tail); |
---|
99 | } |
---|
100 | |
---|
101 | abac_list_t *clauses=cred->clauses; |
---|
102 | if (clauses != NULL) { |
---|
103 | char *cur=NULL; |
---|
104 | abac_list_foreach(clauses, cur, |
---|
105 | printf(" a clause(%d):\n",(int)cur); |
---|
106 | if(cur) |
---|
107 | printf ("strlen(%d)loc(%d)(%s)\n", strlen(cur),(int)cur, cur); |
---|
108 | ); |
---|
109 | } |
---|
110 | } else { |
---|
111 | printf(" "); |
---|
112 | abac_print_role_string_with_condition(cred->head); |
---|
113 | printf(" <- "); |
---|
114 | abac_print_role_string_with_condition(cred->tail); |
---|
115 | printf("\n"); |
---|
116 | } |
---|
117 | } |
---|
118 | |
---|
119 | // |
---|
120 | int abac_verify_keyid_type(char *type) { |
---|
121 | int i; |
---|
122 | |
---|
123 | if (type == NULL) |
---|
124 | return 0; |
---|
125 | |
---|
126 | for (i = 1; i <= keyidname_cnt ; i++) |
---|
127 | if(strcmp(type,keyidname[i])==0) |
---|
128 | return i; |
---|
129 | return 0; |
---|
130 | } |
---|
131 | |
---|
132 | char *abac_keyid_type(int i) |
---|
133 | { |
---|
134 | return keyidname[i]; |
---|
135 | } |
---|
136 | |
---|
137 | int abac_verify_dterm_type(char *type) { |
---|
138 | int i; |
---|
139 | |
---|
140 | if (type == NULL) |
---|
141 | return 0; |
---|
142 | |
---|
143 | for (i = 1; i <= dtermname_cnt ; i++) |
---|
144 | if(strcmp(type,dtermname[i])==0) |
---|
145 | return i; |
---|
146 | return 0; |
---|
147 | } |
---|
148 | |
---|
149 | // convert a chunk to a lowercase binary string |
---|
150 | // malloc's the string |
---|
151 | static char *_chunk_to_string(chunk_t chunk) { |
---|
152 | int i; |
---|
153 | |
---|
154 | char *ret = abac_xmalloc(chunk.len * 2 + 1); |
---|
155 | |
---|
156 | for (i = 0; i < chunk.len; ++i) |
---|
157 | sprintf(ret + 2 * i, "%02x", chunk.ptr[i]); |
---|
158 | |
---|
159 | return ret; |
---|
160 | } |
---|
161 | |
---|
162 | // verify that cert was issued by issuer |
---|
163 | // cert and issuer can be the same, in which case the self-sig is validated |
---|
164 | static int _verify_signature(certificate_t *issuer, certificate_t *cert) { |
---|
165 | if (cert->issued_by(cert, issuer)) |
---|
166 | if (cert->get_validity(cert, NULL, NULL, NULL)) |
---|
167 | return 1; |
---|
168 | return 0; |
---|
169 | } |
---|
170 | |
---|
171 | /** |
---|
172 | * Init the verifier subsystem. |
---|
173 | */ |
---|
174 | void abac_verifier_init(void) { |
---|
175 | // silence all debugging |
---|
176 | |
---|
177 | if (!library_init(NULL)) |
---|
178 | exit(SS_RC_LIBSTRONGSWAN_INTEGRITY); |
---|
179 | |
---|
180 | if (!lib->plugins->load(lib->plugins, NULL, |
---|
181 | lib->settings->get_str(lib->settings, "pki.load", PLUGINS))) |
---|
182 | exit(SS_RC_INITIALIZATION_FAILED); |
---|
183 | } |
---|
184 | |
---|
185 | /** |
---|
186 | * Uninitialize the system, free up any allocated memory. |
---|
187 | */ |
---|
188 | void abac_verifier_deinit(void) { |
---|
189 | abac_id_cert_t *id; |
---|
190 | while ((id = id_certs) != NULL) { |
---|
191 | HASH_DEL(id_certs, id); |
---|
192 | |
---|
193 | free(id->keyid); |
---|
194 | free(id->cn); |
---|
195 | id->cert->destroy(id->cert); |
---|
196 | free(id); |
---|
197 | } |
---|
198 | |
---|
199 | abac_str_cred_t *id2; |
---|
200 | while ((id2 = str_creds) != NULL) { |
---|
201 | HASH_DEL(str_creds, id2); |
---|
202 | |
---|
203 | free(id2->strid); |
---|
204 | free(id2); |
---|
205 | } |
---|
206 | |
---|
207 | library_deinit(); |
---|
208 | } |
---|
209 | |
---|
210 | /** |
---|
211 | * Load an ID certificate. |
---|
212 | */ |
---|
213 | static int _load_id(certificate_t *cert, abac_id_cert_t **id_cert_ret) { |
---|
214 | abac_id_cert_t *id_cert = NULL; |
---|
215 | char *keyid = NULL; |
---|
216 | chunk_t id; |
---|
217 | int ret; |
---|
218 | x509_t *x509 = (x509_t *)cert; |
---|
219 | |
---|
220 | assert(cert != NULL); |
---|
221 | |
---|
222 | // get the key ID |
---|
223 | id = x509->get_subjectKeyIdentifier(x509); |
---|
224 | keyid = _chunk_to_string(id); |
---|
225 | |
---|
226 | char *str; |
---|
227 | int rv = asprintf(&str, "%Y", cert->get_issuer(cert)); |
---|
228 | |
---|
229 | char *cn=(char *)abac_xmalloc(strlen(str)+2); |
---|
230 | cn[0]='p'; |
---|
231 | int n=sscanf(str,"CN=%s", &(cn[1])); |
---|
232 | if ( n!=1 ) { |
---|
233 | ret = ABAC_CERT_BAD_CN; |
---|
234 | goto error; |
---|
235 | } |
---|
236 | |
---|
237 | if(debug) { |
---|
238 | printf ("DEBUG:keyid %s \n", keyid); |
---|
239 | printf( "DEBUG:issuer '%s' \n", str); |
---|
240 | printf ("DEBUG:cn %s \n", cn); |
---|
241 | } |
---|
242 | free(str); |
---|
243 | |
---|
244 | // if we already have this cert 'error' with success |
---|
245 | HASH_FIND_STR(id_certs, keyid, id_cert); |
---|
246 | if (id_cert != NULL) { |
---|
247 | ret = ABAC_CERT_SUCCESS; |
---|
248 | goto error; |
---|
249 | } |
---|
250 | |
---|
251 | // validate sig |
---|
252 | ret = _verify_signature(cert, cert); |
---|
253 | if (!ret) { |
---|
254 | ret = ABAC_CERT_BAD_SIG; |
---|
255 | goto error; |
---|
256 | } |
---|
257 | |
---|
258 | // success, add the key to the map of certificates |
---|
259 | id_cert = abac_xmalloc(sizeof(abac_id_cert_t)); |
---|
260 | id_cert->keyid = keyid; |
---|
261 | id_cert->cert = cert; |
---|
262 | id_cert->cn = cn; |
---|
263 | /* XXX default it to it now */ |
---|
264 | id_cert->type = KEYID; |
---|
265 | id_cert->clause = generate_pl_type_clause(cn, id_cert->type); |
---|
266 | |
---|
267 | HASH_ADD_KEYPTR(hh, id_certs, id_cert->keyid, strlen(id_cert->keyid), id_cert); |
---|
268 | |
---|
269 | *id_cert_ret=id_cert; |
---|
270 | |
---|
271 | return ABAC_CERT_SUCCESS; |
---|
272 | |
---|
273 | error: |
---|
274 | if (keyid != NULL) free(keyid); |
---|
275 | if (cn != NULL) free(cn); |
---|
276 | |
---|
277 | return ret; |
---|
278 | } |
---|
279 | |
---|
280 | static void check_id_cert(abac_id_cert_t *id_cert) |
---|
281 | { |
---|
282 | if(id_cert) { |
---|
283 | printf("checking on this id_cert %d\n", (int)id_cert); |
---|
284 | printf(" --> sha is (%s)\n", id_cert->keyid); |
---|
285 | printf(" --> cn is (%s)\n", id_cert->cn); |
---|
286 | } |
---|
287 | } |
---|
288 | |
---|
289 | /** |
---|
290 | * Load an attribute cert as string. |
---|
291 | * have minimum syntax & validity check |
---|
292 | XXXX |
---|
293 | */ |
---|
294 | static int _load_attribute_string(char* attr_string) { |
---|
295 | printf("NOT implemented yet!!!"); |
---|
296 | return ABAC_CERT_INVALID; |
---|
297 | } |
---|
298 | |
---|
299 | /** |
---|
300 | * Load an ID cert from a file. |
---|
301 | */ |
---|
302 | int abac_verifier_load_id_file(char *filename, abac_id_cert_t **id_cert_ret) { |
---|
303 | if (lib == NULL) |
---|
304 | errx(1, "looks like you didn't call libabac_init() (lib is NULL)"); |
---|
305 | |
---|
306 | // load the cert |
---|
307 | certificate_t *cert = lib->creds->create( |
---|
308 | lib->creds, CRED_CERTIFICATE, CERT_X509, |
---|
309 | BUILD_FROM_FILE, filename, |
---|
310 | BUILD_X509_FLAG, X509_AA, // attribute authority, dumb |
---|
311 | BUILD_END |
---|
312 | ); |
---|
313 | if (cert == NULL) |
---|
314 | return ABAC_CERT_INVALID; |
---|
315 | return _load_id(cert,id_cert_ret); |
---|
316 | } |
---|
317 | |
---|
318 | /** |
---|
319 | * Load an ID cert from a chunk. |
---|
320 | */ |
---|
321 | int abac_verifier_load_id_chunk(chunk_t chunk, abac_id_cert_t **id_cert_ret) { |
---|
322 | // load the cert |
---|
323 | certificate_t *cert = lib->creds->create( |
---|
324 | lib->creds, CRED_CERTIFICATE, CERT_X509, |
---|
325 | BUILD_BLOB_ASN1_DER, chunk, |
---|
326 | BUILD_X509_FLAG, X509_AA, // attribute authority, dumb |
---|
327 | BUILD_END |
---|
328 | ); |
---|
329 | if (cert == NULL) |
---|
330 | return ABAC_CERT_INVALID; |
---|
331 | return _load_id(cert,id_cert_ret); |
---|
332 | } |
---|
333 | |
---|
334 | |
---|
335 | void abac_print_clauses(abac_list_t *clauses) |
---|
336 | { |
---|
337 | if (clauses != NULL) { |
---|
338 | char *cur; |
---|
339 | abac_list_foreach(clauses, cur, |
---|
340 | if(cur) |
---|
341 | printf ("a clause, %d(%s)\n", (int)cur,cur); |
---|
342 | ); |
---|
343 | } |
---|
344 | } |
---|
345 | |
---|
346 | /** |
---|
347 | * Load an attribute cert. |
---|
348 | * Returns true only if the certificate is valid and is issued by the proper |
---|
349 | * authority. |
---|
350 | */ |
---|
351 | static int _load_attribute_cert(certificate_t *cert, abac_credential_t **cred_ret) { |
---|
352 | ietf_attributes_t *attr_cert = NULL; |
---|
353 | abac_role_t *head_role = NULL; |
---|
354 | abac_role_t *tail_role = NULL; |
---|
355 | abac_list_t *clauses=NULL; |
---|
356 | abac_id_cert_t *issuer; |
---|
357 | char *attr_string_copy; |
---|
358 | int ret, i; |
---|
359 | |
---|
360 | // get the attr |
---|
361 | ac_t *ac = (ac_t *)cert; |
---|
362 | attr_cert = ac->get_groups(ac); |
---|
363 | if (attr_cert == NULL) { |
---|
364 | ret = ABAC_CERT_INVALID; |
---|
365 | goto error; |
---|
366 | } |
---|
367 | |
---|
368 | char *attr_string = attr_cert->get_string(attr_cert); |
---|
369 | if (attr_string == NULL) { |
---|
370 | ret = ABAC_CERT_INVALID; |
---|
371 | goto error; |
---|
372 | } |
---|
373 | |
---|
374 | /* call into yacc parser */ |
---|
375 | attr_string_copy = strdup(attr_string); |
---|
376 | abac_reset_yyfptr(attr_string_copy); |
---|
377 | abac_yyinit(); |
---|
378 | int rc=yyparse(); |
---|
379 | if (rc) { |
---|
380 | ret = ABAC_CERT_INVALID; |
---|
381 | goto error; |
---|
382 | } |
---|
383 | head_role = abac_get_yap_head_role(); |
---|
384 | tail_role = abac_get_yap_tail_role(); |
---|
385 | clauses = abac_get_yap_clauses(); |
---|
386 | |
---|
387 | // get the issuer based on keyid |
---|
388 | char *principalname = abac_role_principal(head_role); |
---|
389 | HASH_FIND_STR(id_certs, principalname, issuer); |
---|
390 | if (issuer == NULL) { |
---|
391 | ret = ABAC_CERT_MISSING_ISSUER; |
---|
392 | goto error; |
---|
393 | } |
---|
394 | |
---|
395 | // make sure the issuer's signed it |
---|
396 | ret = _verify_signature(issuer->cert, cert); |
---|
397 | if (!ret) { |
---|
398 | set_error_code(ABAC_RT_CERT_BAD_SIG); |
---|
399 | goto error; |
---|
400 | } |
---|
401 | |
---|
402 | // at this point we know we have a good attribute cert |
---|
403 | abac_credential_t *cred = abac_xmalloc(sizeof(abac_credential_t)); |
---|
404 | cred->head = head_role; |
---|
405 | cred->tail = tail_role; |
---|
406 | cred->cert = cert; |
---|
407 | cred->issuer = issuer->cert->get_ref(issuer->cert); |
---|
408 | cred->clauses = clauses; |
---|
409 | cred->refcount = 1; |
---|
410 | *cred_ret = cred; |
---|
411 | |
---|
412 | // success, add the key to the map of certificates |
---|
413 | abac_str_cred_t *str_cred; |
---|
414 | str_cred=abac_xmalloc(sizeof(abac_str_cred_t)); |
---|
415 | str_cred->strid=attr_string_copy; |
---|
416 | str_cred->cred=cred; |
---|
417 | HASH_ADD_KEYPTR(hh, str_creds, str_cred->strid, strlen(str_cred->strid), str_cred); |
---|
418 | |
---|
419 | // free up some crap |
---|
420 | attr_cert->destroy(attr_cert); |
---|
421 | |
---|
422 | return ABAC_CERT_SUCCESS; |
---|
423 | |
---|
424 | error: |
---|
425 | if (cert) cert->destroy(cert); |
---|
426 | if (attr_cert) attr_cert->destroy(attr_cert); |
---|
427 | if (head_role) abac_role_free(head_role); |
---|
428 | if (tail_role) abac_role_free(tail_role); |
---|
429 | if (attr_string_copy) free(attr_string_copy); |
---|
430 | abac_free_yap_clauses(); |
---|
431 | |
---|
432 | return ret; |
---|
433 | } |
---|
434 | |
---|
435 | /** |
---|
436 | * Load an attribute cert from a file. |
---|
437 | */ |
---|
438 | int abac_verifier_load_attribute_cert_file(char *filename, abac_credential_t **cred) { |
---|
439 | // load the cert |
---|
440 | certificate_t *cert = lib->creds->create( |
---|
441 | lib->creds, CRED_CERTIFICATE, CERT_X509_AC, |
---|
442 | BUILD_FROM_FILE, filename, |
---|
443 | BUILD_END |
---|
444 | ); |
---|
445 | if (cert == NULL) |
---|
446 | return ABAC_CERT_INVALID; |
---|
447 | return _load_attribute_cert(cert, cred); |
---|
448 | } |
---|
449 | |
---|
450 | /** |
---|
451 | * Load attribute cert rules from a file. (this should only be used to test) |
---|
452 | */ |
---|
453 | int abac_verifier_load_certs_file(char *filename) { |
---|
454 | size_t nbytes=0; |
---|
455 | char *input=NULL; |
---|
456 | FILE *fp; |
---|
457 | int ret; |
---|
458 | |
---|
459 | fp=fopen(filename, "r"); |
---|
460 | |
---|
461 | if(fp == NULL) |
---|
462 | return ABAC_CERT_INVALID; |
---|
463 | |
---|
464 | while( (ret=getline(&input, &nbytes, fp)) != -1 ) { |
---|
465 | ret=_load_attribute_string(input); |
---|
466 | free(input); |
---|
467 | if(ret != ABAC_CERT_SUCCESS ) |
---|
468 | fclose(fp); |
---|
469 | return ret; |
---|
470 | } |
---|
471 | fclose(fp); |
---|
472 | return ABAC_CERT_SUCCESS; |
---|
473 | } |
---|
474 | |
---|
475 | |
---|
476 | /** |
---|
477 | * Load an attribute cert from a chunk. |
---|
478 | */ |
---|
479 | int abac_verifier_load_attribute_cert_chunk(chunk_t chunk, abac_credential_t **cred) { |
---|
480 | // load the cert |
---|
481 | certificate_t *cert = lib->creds->create( |
---|
482 | lib->creds, CRED_CERTIFICATE, CERT_X509_AC, |
---|
483 | BUILD_BLOB_ASN1_DER, chunk, |
---|
484 | BUILD_END |
---|
485 | ); |
---|
486 | if (cert == NULL) |
---|
487 | return ABAC_CERT_INVALID; |
---|
488 | return _load_attribute_cert(cert, cred); |
---|
489 | } |
---|
490 | |
---|
491 | /** |
---|
492 | * Return the head role. |
---|
493 | */ |
---|
494 | abac_role_t *abac_credential_head(abac_credential_t *cred) { |
---|
495 | return cred->head; |
---|
496 | } |
---|
497 | |
---|
498 | /** |
---|
499 | * Return the tail role. |
---|
500 | */ |
---|
501 | abac_role_t *abac_credential_tail(abac_credential_t *cred) { |
---|
502 | return cred->tail; |
---|
503 | } |
---|
504 | |
---|
505 | /** |
---|
506 | * Return the encoding of the attribute cert. |
---|
507 | */ |
---|
508 | abac_chunk_t abac_credential_attribute_cert(abac_credential_t *cred) { |
---|
509 | chunk_t encoding = cred->cert->get_encoding(cred->cert); |
---|
510 | abac_chunk_t ret = { encoding.ptr, encoding.len }; |
---|
511 | return ret; |
---|
512 | } |
---|
513 | |
---|
514 | /** |
---|
515 | * Return the encoding of the issuer cert. |
---|
516 | */ |
---|
517 | abac_chunk_t abac_credential_issuer_cert(abac_credential_t *cred) { |
---|
518 | chunk_t encoding = cred->issuer->get_encoding(cred->issuer); |
---|
519 | abac_chunk_t ret = { encoding.ptr, encoding.len }; |
---|
520 | return ret; |
---|
521 | } |
---|
522 | |
---|
523 | /** |
---|
524 | * Return the clause of the cert |
---|
525 | */ |
---|
526 | abac_list_t *abac_credential_clauses(abac_credential_t *cred) { |
---|
527 | return cred->clauses; |
---|
528 | } |
---|
529 | |
---|
530 | |
---|
531 | /** |
---|
532 | * Increase the ref count of a credential. |
---|
533 | */ |
---|
534 | abac_credential_t *abac_credential_dup(abac_credential_t *cred) { |
---|
535 | assert(cred != NULL); |
---|
536 | |
---|
537 | ++cred->refcount; |
---|
538 | return cred; |
---|
539 | } |
---|
540 | |
---|
541 | /** |
---|
542 | * lookup for a credential. |
---|
543 | */ |
---|
544 | abac_credential_t *abac_credential_lookup(char* cred_string) |
---|
545 | { |
---|
546 | if(debug) |
---|
547 | printf("DEBUG:doing abac_crendential_lookup ... (%s)\n", cred_string); |
---|
548 | abac_str_cred_t *str_cred; |
---|
549 | HASH_FIND_STR(str_creds, cred_string, str_cred); |
---|
550 | if (str_cred == NULL) { |
---|
551 | if(debug) printf("DEBUG:NOT FOUND..\n"); |
---|
552 | return NULL; |
---|
553 | } |
---|
554 | if(debug) printf("DEBUG:FOUND..(%d)\n", (int) str_cred->cred); |
---|
555 | return str_cred->cred; |
---|
556 | } |
---|
557 | |
---|
558 | /** |
---|
559 | * Decrease the reference count of a credential, freeing it when it reaches 0. |
---|
560 | */ |
---|
561 | void abac_credential_free(abac_credential_t *cred) |
---|
562 | { |
---|
563 | if(debug) |
---|
564 | printf("DEBUG:freeing cred(%d)clause(%d)\n", (int)cred, (int)cred->clauses); |
---|
565 | |
---|
566 | if (cred == NULL) |
---|
567 | return; |
---|
568 | |
---|
569 | --cred->refcount; |
---|
570 | if (cred->refcount > 0) |
---|
571 | return; |
---|
572 | |
---|
573 | abac_role_free(cred->head); |
---|
574 | abac_role_free(cred->tail); |
---|
575 | cred->cert->destroy(cred->cert); |
---|
576 | cred->issuer->destroy(cred->issuer); // reference counted |
---|
577 | /* no need to free yap_clauses here */ |
---|
578 | free(cred); |
---|
579 | } |
---|
580 | |
---|
581 | char *abac_id_clause(abac_id_cert_t *id_cert) |
---|
582 | { |
---|
583 | if(id_cert) |
---|
584 | return id_cert->clause; |
---|
585 | return NULL; |
---|
586 | } |
---|
587 | |
---|
588 | /* retrieve the cn that is associated with this sha_string */ |
---|
589 | char *abac_cn_with_sha(char *sha_string) { |
---|
590 | |
---|
591 | // get the issuer based on keyid |
---|
592 | abac_id_cert_t *id_cert; |
---|
593 | HASH_FIND_STR(id_certs, sha_string, id_cert); |
---|
594 | if (id_cert == NULL) { |
---|
595 | return NULL; |
---|
596 | } |
---|
597 | if(debug) |
---|
598 | check_id_cert(id_cert); |
---|
599 | return id_cert->cn; |
---|
600 | } |
---|
601 | |
---|
602 | /* retrieve the cn that is associated with the principal of this role */ |
---|
603 | char *abac_cn_with_role(abac_role_t *role) { |
---|
604 | |
---|
605 | char *principal = abac_role_principal(role); |
---|
606 | return abac_cn_with_sha(principal); |
---|
607 | } |
---|
608 | |
---|