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	if ((ret->param = X509_VERIFY_PARAM_new()) == NULL)
191		return NULL;
192
193	ret->get_issuer = 0;
194	ret->check_issued = 0;
195	ret->check_revocation = 0;
196	ret->get_crl = 0;
197	ret->check_crl = 0;
198	ret->cert_crl = 0;
199	ret->cleanup = 0;
200
201	if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_X509_STORE, ret, &ret->ex_data))
202		{
203		sk_X509_OBJECT_free(ret->objs);
204		OPENSSL_free(ret);
205		return NULL;
206		}
207
208	ret->references=1;
209	return ret;
210	}
211
212static void cleanup(X509_OBJECT *a)
213	{
214	if (a->type == X509_LU_X509)
215		{
216		X509_free(a->data.x509);
217		}
218	else if (a->type == X509_LU_CRL)
219		{
220		X509_CRL_free(a->data.crl);
221		}
222	else
223		{
224		/* abort(); */
225		}
226
227	OPENSSL_free(a);
228	}
229
230void X509_STORE_free(X509_STORE *vfy)
231	{
232	int i;
233	STACK_OF(X509_LOOKUP) *sk;
234	X509_LOOKUP *lu;
235
236	if (vfy == NULL)
237	    return;
238
239	sk=vfy->get_cert_methods;
240	for (i=0; i<sk_X509_LOOKUP_num(sk); i++)
241		{
242		lu=sk_X509_LOOKUP_value(sk,i);
243		X509_LOOKUP_shutdown(lu);
244		X509_LOOKUP_free(lu);
245		}
246	sk_X509_LOOKUP_free(sk);
247	sk_X509_OBJECT_pop_free(vfy->objs, cleanup);
248
249	CRYPTO_free_ex_data(CRYPTO_EX_INDEX_X509_STORE, vfy, &vfy->ex_data);
250	if (vfy->param)
251		X509_VERIFY_PARAM_free(vfy->param);
252	OPENSSL_free(vfy);
253	}
254
255X509_LOOKUP *X509_STORE_add_lookup(X509_STORE *v, X509_LOOKUP_METHOD *m)
256	{
257	int i;
258	STACK_OF(X509_LOOKUP) *sk;
259	X509_LOOKUP *lu;
260
261	sk=v->get_cert_methods;
262	for (i=0; i<sk_X509_LOOKUP_num(sk); i++)
263		{
264		lu=sk_X509_LOOKUP_value(sk,i);
265		if (m == lu->method)
266			{
267			return lu;
268			}
269		}
270	/* a new one */
271	lu=X509_LOOKUP_new(m);
272	if (lu == NULL)
273		return NULL;
274	else
275		{
276		lu->store_ctx=v;
277		if (sk_X509_LOOKUP_push(v->get_cert_methods,lu))
278			return lu;
279		else
280			{
281			X509_LOOKUP_free(lu);
282			return NULL;
283			}
284		}
285	}
286
287int X509_STORE_get_by_subject(X509_STORE_CTX *vs, int type, X509_NAME *name,
288	     X509_OBJECT *ret)
289	{
290	X509_STORE *ctx=vs->ctx;
291	X509_LOOKUP *lu;
292	X509_OBJECT stmp,*tmp;
293	int i,j;
294
295	CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);
296	tmp=X509_OBJECT_retrieve_by_subject(ctx->objs,type,name);
297	CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
298
299	if (tmp == NULL)
300		{
301		for (i=vs->current_method; i<sk_X509_LOOKUP_num(ctx->get_cert_methods); i++)
302			{
303			lu=sk_X509_LOOKUP_value(ctx->get_cert_methods,i);
304			j=X509_LOOKUP_by_subject(lu,type,name,&stmp);
305			if (j < 0)
306				{
307				vs->current_method=j;
308				return j;
309				}
310			else if (j)
311				{
312				tmp= &stmp;
313				break;
314				}
315			}
316		vs->current_method=0;
317		if (tmp == NULL)
318			return 0;
319		}
320
321/*	if (ret->data.ptr != NULL)
322		X509_OBJECT_free_contents(ret); */
323
324	ret->type=tmp->type;
325	ret->data.ptr=tmp->data.ptr;
326
327	X509_OBJECT_up_ref_count(ret);
328
329	return 1;
330	}
331
332int X509_STORE_add_cert(X509_STORE *ctx, X509 *x)
333	{
334	X509_OBJECT *obj;
335	int ret=1;
336
337	if (x == NULL) return 0;
338	obj=(X509_OBJECT *)OPENSSL_malloc(sizeof(X509_OBJECT));
339	if (obj == NULL)
340		{
341		X509err(X509_F_X509_STORE_ADD_CERT,ERR_R_MALLOC_FAILURE);
342		return 0;
343		}
344	obj->type=X509_LU_X509;
345	obj->data.x509=x;
346
347	CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);
348
349	X509_OBJECT_up_ref_count(obj);
350
351	if (X509_OBJECT_retrieve_match(ctx->objs, obj))
352		{
353		X509_OBJECT_free_contents(obj);
354		OPENSSL_free(obj);
355		X509err(X509_F_X509_STORE_ADD_CERT,X509_R_CERT_ALREADY_IN_HASH_TABLE);
356		ret=0;
357		}
358	else sk_X509_OBJECT_push(ctx->objs, obj);
359
360	CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
361
362	return ret;
363	}
364
365int X509_STORE_add_crl(X509_STORE *ctx, X509_CRL *x)
366	{
367	X509_OBJECT *obj;
368	int ret=1;
369
370	if (x == NULL) return 0;
371	obj=(X509_OBJECT *)OPENSSL_malloc(sizeof(X509_OBJECT));
372	if (obj == NULL)
373		{
374		X509err(X509_F_X509_STORE_ADD_CRL,ERR_R_MALLOC_FAILURE);
375		return 0;
376		}
377	obj->type=X509_LU_CRL;
378	obj->data.crl=x;
379
380	CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);
381
382	X509_OBJECT_up_ref_count(obj);
383
384	if (X509_OBJECT_retrieve_match(ctx->objs, obj))
385		{
386		X509_OBJECT_free_contents(obj);
387		OPENSSL_free(obj);
388		X509err(X509_F_X509_STORE_ADD_CRL,X509_R_CERT_ALREADY_IN_HASH_TABLE);
389		ret=0;
390		}
391	else sk_X509_OBJECT_push(ctx->objs, obj);
392
393	CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
394
395	return ret;
396	}
397
398void X509_OBJECT_up_ref_count(X509_OBJECT *a)
399	{
400	switch (a->type)
401		{
402	case X509_LU_X509:
403		CRYPTO_add(&a->data.x509->references,1,CRYPTO_LOCK_X509);
404		break;
405	case X509_LU_CRL:
406		CRYPTO_add(&a->data.crl->references,1,CRYPTO_LOCK_X509_CRL);
407		break;
408		}
409	}
410
411void X509_OBJECT_free_contents(X509_OBJECT *a)
412	{
413	switch (a->type)
414		{
415	case X509_LU_X509:
416		X509_free(a->data.x509);
417		break;
418	case X509_LU_CRL:
419		X509_CRL_free(a->data.crl);
420		break;
421		}
422	}
423
424int X509_OBJECT_idx_by_subject(STACK_OF(X509_OBJECT) *h, int type,
425	     X509_NAME *name)
426	{
427	X509_OBJECT stmp;
428	X509 x509_s;
429	X509_CINF cinf_s;
430	X509_CRL crl_s;
431	X509_CRL_INFO crl_info_s;
432
433	stmp.type=type;
434	switch (type)
435		{
436	case X509_LU_X509:
437		stmp.data.x509= &x509_s;
438		x509_s.cert_info= &cinf_s;
439		cinf_s.subject=name;
440		break;
441	case X509_LU_CRL:
442		stmp.data.crl= &crl_s;
443		crl_s.crl= &crl_info_s;
444		crl_info_s.issuer=name;
445		break;
446	default:
447		/* abort(); */
448		return -1;
449		}
450
451	return sk_X509_OBJECT_find(h,&stmp);
452	}
453
454X509_OBJECT *X509_OBJECT_retrieve_by_subject(STACK_OF(X509_OBJECT) *h, int type,
455	     X509_NAME *name)
456	{
457	int idx;
458	idx = X509_OBJECT_idx_by_subject(h, type, name);
459	if (idx==-1) return NULL;
460	return sk_X509_OBJECT_value(h, idx);
461	}
462
463X509_OBJECT *X509_OBJECT_retrieve_match(STACK_OF(X509_OBJECT) *h, X509_OBJECT *x)
464	{
465	int idx, i;
466	X509_OBJECT *obj;
467	idx = sk_X509_OBJECT_find(h, x);
468	if (idx == -1) return NULL;
469	if (x->type != X509_LU_X509) return sk_X509_OBJECT_value(h, idx);
470	for (i = idx; i < sk_X509_OBJECT_num(h); i++)
471		{
472		obj = sk_X509_OBJECT_value(h, i);
473		if (x509_object_cmp((const X509_OBJECT **)&obj, (const X509_OBJECT **)&x))
474			return NULL;
475		if ((x->type != X509_LU_X509) || !X509_cmp(obj->data.x509, x->data.x509))
476			return obj;
477		}
478	return NULL;
479	}
480
481
482/* Try to get issuer certificate from store. Due to limitations
483 * of the API this can only retrieve a single certificate matching
484 * a given subject name. However it will fill the cache with all
485 * matching certificates, so we can examine the cache for all
486 * matches.
487 *
488 * Return values are:
489 *  1 lookup successful.
490 *  0 certificate not found.
491 * -1 some other error.
492 */
493int X509_STORE_CTX_get1_issuer(X509 **issuer, X509_STORE_CTX *ctx, X509 *x)
494	{
495	X509_NAME *xn;
496	X509_OBJECT obj, *pobj;
497	int i, ok, idx, ret;
498	xn=X509_get_issuer_name(x);
499	ok=X509_STORE_get_by_subject(ctx,X509_LU_X509,xn,&obj);
500	if (ok != X509_LU_X509)
501		{
502		if (ok == X509_LU_RETRY)
503			{
504			X509_OBJECT_free_contents(&obj);
505			X509err(X509_F_X509_STORE_CTX_GET1_ISSUER,X509_R_SHOULD_RETRY);
506			return -1;
507			}
508		else if (ok != X509_LU_FAIL)
509			{
510			X509_OBJECT_free_contents(&obj);
511			/* not good :-(, break anyway */
512			return -1;
513			}
514		return 0;
515		}
516	/* If certificate matches all OK */
517	if (ctx->check_issued(ctx, x, obj.data.x509))
518		{
519		*issuer = obj.data.x509;
520		return 1;
521		}
522	X509_OBJECT_free_contents(&obj);
523
524	/* Else find index of first cert accepted by 'check_issued' */
525	ret = 0;
526	CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);
527	idx = X509_OBJECT_idx_by_subject(ctx->ctx->objs, X509_LU_X509, xn);
528	if (idx != -1) /* should be true as we've had at least one match */
529		{
530		/* Look through all matching certs for suitable issuer */
531		for (i = idx; i < sk_X509_OBJECT_num(ctx->ctx->objs); i++)
532			{
533			pobj = sk_X509_OBJECT_value(ctx->ctx->objs, i);
534			/* See if we've run past the matches */
535			if (pobj->type != X509_LU_X509)
536				break;
537			if (X509_NAME_cmp(xn, X509_get_subject_name(pobj->data.x509)))
538				break;
539			if (ctx->check_issued(ctx, x, pobj->data.x509))
540				{
541				*issuer = pobj->data.x509;
542				X509_OBJECT_up_ref_count(pobj);
543				ret = 1;
544				break;
545				}
546			}
547		}
548	CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
549	return ret;
550	}
551
552int X509_STORE_set_flags(X509_STORE *ctx, unsigned long flags)
553	{
554	return X509_VERIFY_PARAM_set_flags(ctx->param, flags);
555	}
556
557int X509_STORE_set_depth(X509_STORE *ctx, int depth)
558	{
559	X509_VERIFY_PARAM_set_depth(ctx->param, depth);
560	return 1;
561	}
562
563int X509_STORE_set_purpose(X509_STORE *ctx, int purpose)
564	{
565	return X509_VERIFY_PARAM_set_purpose(ctx->param, purpose);
566	}
567
568int X509_STORE_set_trust(X509_STORE *ctx, int trust)
569	{
570	return X509_VERIFY_PARAM_set_trust(ctx->param, trust);
571	}
572
573int X509_STORE_set1_param(X509_STORE *ctx, X509_VERIFY_PARAM *param)
574	{
575	return X509_VERIFY_PARAM_set1(ctx->param, param);
576	}
577
578IMPLEMENT_STACK_OF(X509_LOOKUP)
579IMPLEMENT_STACK_OF(X509_OBJECT)
580