x509_lu.c revision 109998
1/* crypto/x509/x509_lu.c */
2/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3 * All rights reserved.
4 *
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
8 *
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to.  The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15 *
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
22 *
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
25 * are met:
26 * 1. Redistributions of source code must retain the copyright
27 *    notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 *    notice, this list of conditions and the following disclaimer in the
30 *    documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 *    must display the following acknowledgement:
33 *    "This product includes cryptographic software written by
34 *     Eric Young (eay@cryptsoft.com)"
35 *    The word 'cryptographic' can be left out if the rouines from the library
36 *    being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 *    the apps directory (application code) you must include an acknowledgement:
39 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40 *
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51 * SUCH DAMAGE.
52 *
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed.  i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
57 */
58
59#include <stdio.h>
60#include "cryptlib.h"
61#include <openssl/lhash.h>
62#include <openssl/x509.h>
63#include <openssl/x509v3.h>
64
65X509_LOOKUP *X509_LOOKUP_new(X509_LOOKUP_METHOD *method)
66	{
67	X509_LOOKUP *ret;
68
69	ret=(X509_LOOKUP *)OPENSSL_malloc(sizeof(X509_LOOKUP));
70	if (ret == NULL) return NULL;
71
72	ret->init=0;
73	ret->skip=0;
74	ret->method=method;
75	ret->method_data=NULL;
76	ret->store_ctx=NULL;
77	if ((method->new_item != NULL) && !method->new_item(ret))
78		{
79		OPENSSL_free(ret);
80		return NULL;
81		}
82	return ret;
83	}
84
85void X509_LOOKUP_free(X509_LOOKUP *ctx)
86	{
87	if (ctx == NULL) return;
88	if (	(ctx->method != NULL) &&
89		(ctx->method->free != NULL))
90		ctx->method->free(ctx);
91	OPENSSL_free(ctx);
92	}
93
94int X509_LOOKUP_init(X509_LOOKUP *ctx)
95	{
96	if (ctx->method == NULL) return 0;
97	if (ctx->method->init != NULL)
98		return ctx->method->init(ctx);
99	else
100		return 1;
101	}
102
103int X509_LOOKUP_shutdown(X509_LOOKUP *ctx)
104	{
105	if (ctx->method == NULL) return 0;
106	if (ctx->method->shutdown != NULL)
107		return ctx->method->shutdown(ctx);
108	else
109		return 1;
110	}
111
112int X509_LOOKUP_ctrl(X509_LOOKUP *ctx, int cmd, const char *argc, long argl,
113	     char **ret)
114	{
115	if (ctx->method == NULL) return -1;
116	if (ctx->method->ctrl != NULL)
117		return ctx->method->ctrl(ctx,cmd,argc,argl,ret);
118	else
119		return 1;
120	}
121
122int X509_LOOKUP_by_subject(X509_LOOKUP *ctx, int type, X509_NAME *name,
123	     X509_OBJECT *ret)
124	{
125	if ((ctx->method == NULL) || (ctx->method->get_by_subject == NULL))
126		return X509_LU_FAIL;
127	if (ctx->skip) return 0;
128	return ctx->method->get_by_subject(ctx,type,name,ret);
129	}
130
131int X509_LOOKUP_by_issuer_serial(X509_LOOKUP *ctx, int type, X509_NAME *name,
132	     ASN1_INTEGER *serial, X509_OBJECT *ret)
133	{
134	if ((ctx->method == NULL) ||
135		(ctx->method->get_by_issuer_serial == NULL))
136		return X509_LU_FAIL;
137	return ctx->method->get_by_issuer_serial(ctx,type,name,serial,ret);
138	}
139
140int X509_LOOKUP_by_fingerprint(X509_LOOKUP *ctx, int type,
141	     unsigned char *bytes, int len, X509_OBJECT *ret)
142	{
143	if ((ctx->method == NULL) || (ctx->method->get_by_fingerprint == NULL))
144		return X509_LU_FAIL;
145	return ctx->method->get_by_fingerprint(ctx,type,bytes,len,ret);
146	}
147
148int X509_LOOKUP_by_alias(X509_LOOKUP *ctx, int type, char *str, int len,
149	     X509_OBJECT *ret)
150	{
151	if ((ctx->method == NULL) || (ctx->method->get_by_alias == NULL))
152		return X509_LU_FAIL;
153	return ctx->method->get_by_alias(ctx,type,str,len,ret);
154	}
155
156
157static int x509_object_cmp(const X509_OBJECT * const *a, const X509_OBJECT * const *b)
158  	{
159 	int ret;
160
161 	ret=((*a)->type - (*b)->type);
162 	if (ret) return ret;
163 	switch ((*a)->type)
164 		{
165 	case X509_LU_X509:
166 		ret=X509_subject_name_cmp((*a)->data.x509,(*b)->data.x509);
167 		break;
168 	case X509_LU_CRL:
169 		ret=X509_CRL_cmp((*a)->data.crl,(*b)->data.crl);
170 		break;
171	default:
172		/* abort(); */
173		return 0;
174		}
175	return ret;
176	}
177
178X509_STORE *X509_STORE_new(void)
179	{
180	X509_STORE *ret;
181
182	if ((ret=(X509_STORE *)OPENSSL_malloc(sizeof(X509_STORE))) == NULL)
183		return NULL;
184	ret->objs = sk_X509_OBJECT_new(x509_object_cmp);
185	ret->cache=1;
186	ret->get_cert_methods=sk_X509_LOOKUP_new_null();
187	ret->verify=0;
188	ret->verify_cb=0;
189
190	ret->purpose = 0;
191	ret->trust = 0;
192
193	ret->flags = 0;
194
195	ret->get_issuer = 0;
196	ret->check_issued = 0;
197	ret->check_revocation = 0;
198	ret->get_crl = 0;
199	ret->check_crl = 0;
200	ret->cert_crl = 0;
201	ret->cleanup = 0;
202
203	CRYPTO_new_ex_data(CRYPTO_EX_INDEX_X509_STORE, ret, &ret->ex_data);
204	ret->references=1;
205	ret->depth=0;
206	return ret;
207	}
208
209static void cleanup(X509_OBJECT *a)
210	{
211	if (a->type == X509_LU_X509)
212		{
213		X509_free(a->data.x509);
214		}
215	else if (a->type == X509_LU_CRL)
216		{
217		X509_CRL_free(a->data.crl);
218		}
219	else
220		{
221		/* abort(); */
222		}
223
224	OPENSSL_free(a);
225	}
226
227void X509_STORE_free(X509_STORE *vfy)
228	{
229	int i;
230	STACK_OF(X509_LOOKUP) *sk;
231	X509_LOOKUP *lu;
232
233	if (vfy == NULL)
234	    return;
235
236	sk=vfy->get_cert_methods;
237	for (i=0; i<sk_X509_LOOKUP_num(sk); i++)
238		{
239		lu=sk_X509_LOOKUP_value(sk,i);
240		X509_LOOKUP_shutdown(lu);
241		X509_LOOKUP_free(lu);
242		}
243	sk_X509_LOOKUP_free(sk);
244	sk_X509_OBJECT_pop_free(vfy->objs, cleanup);
245
246	CRYPTO_free_ex_data(CRYPTO_EX_INDEX_X509_STORE, vfy, &vfy->ex_data);
247	OPENSSL_free(vfy);
248	}
249
250X509_LOOKUP *X509_STORE_add_lookup(X509_STORE *v, X509_LOOKUP_METHOD *m)
251	{
252	int i;
253	STACK_OF(X509_LOOKUP) *sk;
254	X509_LOOKUP *lu;
255
256	sk=v->get_cert_methods;
257	for (i=0; i<sk_X509_LOOKUP_num(sk); i++)
258		{
259		lu=sk_X509_LOOKUP_value(sk,i);
260		if (m == lu->method)
261			{
262			return lu;
263			}
264		}
265	/* a new one */
266	lu=X509_LOOKUP_new(m);
267	if (lu == NULL)
268		return NULL;
269	else
270		{
271		lu->store_ctx=v;
272		if (sk_X509_LOOKUP_push(v->get_cert_methods,lu))
273			return lu;
274		else
275			{
276			X509_LOOKUP_free(lu);
277			return NULL;
278			}
279		}
280	}
281
282int X509_STORE_get_by_subject(X509_STORE_CTX *vs, int type, X509_NAME *name,
283	     X509_OBJECT *ret)
284	{
285	X509_STORE *ctx=vs->ctx;
286	X509_LOOKUP *lu;
287	X509_OBJECT stmp,*tmp;
288	int i,j;
289
290	tmp=X509_OBJECT_retrieve_by_subject(ctx->objs,type,name);
291
292	if (tmp == NULL)
293		{
294		for (i=vs->current_method; i<sk_X509_LOOKUP_num(ctx->get_cert_methods); i++)
295			{
296			lu=sk_X509_LOOKUP_value(ctx->get_cert_methods,i);
297			j=X509_LOOKUP_by_subject(lu,type,name,&stmp);
298			if (j < 0)
299				{
300				vs->current_method=j;
301				return j;
302				}
303			else if (j)
304				{
305				tmp= &stmp;
306				break;
307				}
308			}
309		vs->current_method=0;
310		if (tmp == NULL)
311			return 0;
312		}
313
314/*	if (ret->data.ptr != NULL)
315		X509_OBJECT_free_contents(ret); */
316
317	ret->type=tmp->type;
318	ret->data.ptr=tmp->data.ptr;
319
320	X509_OBJECT_up_ref_count(ret);
321
322	return 1;
323	}
324
325int X509_STORE_add_cert(X509_STORE *ctx, X509 *x)
326	{
327	X509_OBJECT *obj;
328	int ret=1;
329
330	if (x == NULL) return 0;
331	obj=(X509_OBJECT *)OPENSSL_malloc(sizeof(X509_OBJECT));
332	if (obj == NULL)
333		{
334		X509err(X509_F_X509_STORE_ADD_CERT,ERR_R_MALLOC_FAILURE);
335		return 0;
336		}
337	obj->type=X509_LU_X509;
338	obj->data.x509=x;
339
340	CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);
341
342	X509_OBJECT_up_ref_count(obj);
343
344
345	if (X509_OBJECT_retrieve_match(ctx->objs, obj))
346		{
347		X509_OBJECT_free_contents(obj);
348		OPENSSL_free(obj);
349		X509err(X509_F_X509_STORE_ADD_CERT,X509_R_CERT_ALREADY_IN_HASH_TABLE);
350		ret=0;
351		}
352	else sk_X509_OBJECT_push(ctx->objs, obj);
353
354	CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
355
356	return ret;
357	}
358
359int X509_STORE_add_crl(X509_STORE *ctx, X509_CRL *x)
360	{
361	X509_OBJECT *obj;
362	int ret=1;
363
364	if (x == NULL) return 0;
365	obj=(X509_OBJECT *)OPENSSL_malloc(sizeof(X509_OBJECT));
366	if (obj == NULL)
367		{
368		X509err(X509_F_X509_STORE_ADD_CRL,ERR_R_MALLOC_FAILURE);
369		return 0;
370		}
371	obj->type=X509_LU_CRL;
372	obj->data.crl=x;
373
374	CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);
375
376	X509_OBJECT_up_ref_count(obj);
377
378	if (X509_OBJECT_retrieve_match(ctx->objs, obj))
379		{
380		X509_OBJECT_free_contents(obj);
381		OPENSSL_free(obj);
382		X509err(X509_F_X509_STORE_ADD_CRL,X509_R_CERT_ALREADY_IN_HASH_TABLE);
383		ret=0;
384		}
385	else sk_X509_OBJECT_push(ctx->objs, obj);
386
387	CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
388
389	return ret;
390	}
391
392void X509_OBJECT_up_ref_count(X509_OBJECT *a)
393	{
394	switch (a->type)
395		{
396	case X509_LU_X509:
397		CRYPTO_add(&a->data.x509->references,1,CRYPTO_LOCK_X509);
398		break;
399	case X509_LU_CRL:
400		CRYPTO_add(&a->data.crl->references,1,CRYPTO_LOCK_X509_CRL);
401		break;
402		}
403	}
404
405void X509_OBJECT_free_contents(X509_OBJECT *a)
406	{
407	switch (a->type)
408		{
409	case X509_LU_X509:
410		X509_free(a->data.x509);
411		break;
412	case X509_LU_CRL:
413		X509_CRL_free(a->data.crl);
414		break;
415		}
416	}
417
418int X509_OBJECT_idx_by_subject(STACK_OF(X509_OBJECT) *h, int type,
419	     X509_NAME *name)
420	{
421	X509_OBJECT stmp;
422	X509 x509_s;
423	X509_CINF cinf_s;
424	X509_CRL crl_s;
425	X509_CRL_INFO crl_info_s;
426
427	stmp.type=type;
428	switch (type)
429		{
430	case X509_LU_X509:
431		stmp.data.x509= &x509_s;
432		x509_s.cert_info= &cinf_s;
433		cinf_s.subject=name;
434		break;
435	case X509_LU_CRL:
436		stmp.data.crl= &crl_s;
437		crl_s.crl= &crl_info_s;
438		crl_info_s.issuer=name;
439		break;
440	default:
441		/* abort(); */
442		return -1;
443		}
444
445	return sk_X509_OBJECT_find(h,&stmp);
446	}
447
448X509_OBJECT *X509_OBJECT_retrieve_by_subject(STACK_OF(X509_OBJECT) *h, int type,
449	     X509_NAME *name)
450{
451	int idx;
452	idx = X509_OBJECT_idx_by_subject(h, type, name);
453	if (idx==-1) return NULL;
454	return sk_X509_OBJECT_value(h, idx);
455}
456
457X509_OBJECT *X509_OBJECT_retrieve_match(STACK_OF(X509_OBJECT) *h, X509_OBJECT *x)
458{
459	int idx, i;
460	X509_OBJECT *obj;
461	idx = sk_X509_OBJECT_find(h, x);
462	if (idx == -1) return NULL;
463	if (x->type != X509_LU_X509) return sk_X509_OBJECT_value(h, idx);
464	for (i = idx; i < sk_X509_OBJECT_num(h); i++)
465		{
466		obj = sk_X509_OBJECT_value(h, i);
467		if (x509_object_cmp((const X509_OBJECT **)&obj, (const X509_OBJECT **)&x))
468			return NULL;
469		if ((x->type != X509_LU_X509) || !X509_cmp(obj->data.x509, x->data.x509))
470			return obj;
471		}
472	return NULL;
473}
474
475
476/* Try to get issuer certificate from store. Due to limitations
477 * of the API this can only retrieve a single certificate matching
478 * a given subject name. However it will fill the cache with all
479 * matching certificates, so we can examine the cache for all
480 * matches.
481 *
482 * Return values are:
483 *  1 lookup successful.
484 *  0 certificate not found.
485 * -1 some other error.
486 */
487
488
489int X509_STORE_CTX_get1_issuer(X509 **issuer, X509_STORE_CTX *ctx, X509 *x)
490{
491	X509_NAME *xn;
492	X509_OBJECT obj, *pobj;
493	int i, ok, idx;
494	xn=X509_get_issuer_name(x);
495	ok=X509_STORE_get_by_subject(ctx,X509_LU_X509,xn,&obj);
496	if (ok != X509_LU_X509)
497		{
498		if (ok == X509_LU_RETRY)
499			{
500			X509_OBJECT_free_contents(&obj);
501			X509err(X509_F_X509_VERIFY_CERT,X509_R_SHOULD_RETRY);
502			return -1;
503			}
504		else if (ok != X509_LU_FAIL)
505			{
506			X509_OBJECT_free_contents(&obj);
507			/* not good :-(, break anyway */
508			return -1;
509			}
510		return 0;
511		}
512	/* If certificate matches all OK */
513	if (ctx->check_issued(ctx, x, obj.data.x509))
514		{
515		*issuer = obj.data.x509;
516		return 1;
517		}
518	X509_OBJECT_free_contents(&obj);
519	/* Else find index of first matching cert */
520	idx = X509_OBJECT_idx_by_subject(ctx->ctx->objs, X509_LU_X509, xn);
521	/* This shouldn't normally happen since we already have one match */
522	if (idx == -1) return 0;
523
524	/* Look through all matching certificates for a suitable issuer */
525	for (i = idx; i < sk_X509_OBJECT_num(ctx->ctx->objs); i++)
526		{
527		pobj = sk_X509_OBJECT_value(ctx->ctx->objs, i);
528		/* See if we've ran out of matches */
529		if (pobj->type != X509_LU_X509) return 0;
530		if (X509_NAME_cmp(xn, X509_get_subject_name(pobj->data.x509))) return 0;
531		if (ctx->check_issued(ctx, x, pobj->data.x509))
532			{
533			*issuer = pobj->data.x509;
534			X509_OBJECT_up_ref_count(pobj);
535			return 1;
536			}
537		}
538	return 0;
539}
540
541void X509_STORE_set_flags(X509_STORE *ctx, long flags)
542	{
543	ctx->flags |= flags;
544	}
545
546int X509_STORE_set_purpose(X509_STORE *ctx, int purpose)
547	{
548	return X509_PURPOSE_set(&ctx->purpose, purpose);
549	}
550
551int X509_STORE_set_trust(X509_STORE *ctx, int trust)
552	{
553	return X509_TRUST_set(&ctx->trust, trust);
554	}
555
556IMPLEMENT_STACK_OF(X509_LOOKUP)
557IMPLEMENT_STACK_OF(X509_OBJECT)
558