x509_lu.c revision 59191 
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
64static STACK_OF(CRYPTO_EX_DATA_FUNCS) *x509_store_meth=NULL;
65static STACK_OF(CRYPTO_EX_DATA_FUNCS) *x509_store_ctx_meth=NULL;
66
67X509_LOOKUP *X509_LOOKUP_new(X509_LOOKUP_METHOD *method)
68	{
69	X509_LOOKUP *ret;
70
71	ret=(X509_LOOKUP *)Malloc(sizeof(X509_LOOKUP));
72	if (ret == NULL) return(NULL);
73
74	ret->init=0;
75	ret->skip=0;
76	ret->method=method;
77	ret->method_data=NULL;
78	ret->store_ctx=NULL;
79	if ((method->new_item != NULL) && !method->new_item(ret))
80		{
81		Free(ret);
82		return(NULL);
83		}
84	return(ret);
85	}
86
87void X509_LOOKUP_free(X509_LOOKUP *ctx)
88	{
89	if (ctx == NULL) return;
90	if (	(ctx->method != NULL) &&
91		(ctx->method->free != NULL))
92		ctx->method->free(ctx);
93	Free(ctx);
94	}
95
96int X509_LOOKUP_init(X509_LOOKUP *ctx)
97	{
98	if (ctx->method == NULL) return(0);
99	if (ctx->method->init != NULL)
100		return(ctx->method->init(ctx));
101	else
102		return(1);
103	}
104
105int X509_LOOKUP_shutdown(X509_LOOKUP *ctx)
106	{
107	if (ctx->method == NULL) return(0);
108	if (ctx->method->shutdown != NULL)
109		return(ctx->method->shutdown(ctx));
110	else
111		return(1);
112	}
113
114int X509_LOOKUP_ctrl(X509_LOOKUP *ctx, int cmd, const char *argc, long argl,
115	     char **ret)
116	{
117	if (ctx->method == NULL) return(-1);
118	if (ctx->method->ctrl != NULL)
119		return(ctx->method->ctrl(ctx,cmd,argc,argl,ret));
120	else
121		return(1);
122	}
123
124int X509_LOOKUP_by_subject(X509_LOOKUP *ctx, int type, X509_NAME *name,
125	     X509_OBJECT *ret)
126	{
127	if ((ctx->method == NULL) || (ctx->method->get_by_subject == NULL))
128		return(X509_LU_FAIL);
129	if (ctx->skip) return(0);
130	return(ctx->method->get_by_subject(ctx,type,name,ret));
131	}
132
133int X509_LOOKUP_by_issuer_serial(X509_LOOKUP *ctx, int type, X509_NAME *name,
134	     ASN1_INTEGER *serial, X509_OBJECT *ret)
135	{
136	if ((ctx->method == NULL) ||
137		(ctx->method->get_by_issuer_serial == NULL))
138		return(X509_LU_FAIL);
139	return(ctx->method->get_by_issuer_serial(ctx,type,name,serial,ret));
140	}
141
142int X509_LOOKUP_by_fingerprint(X509_LOOKUP *ctx, int type,
143	     unsigned char *bytes, int len, X509_OBJECT *ret)
144	{
145	if ((ctx->method == NULL) || (ctx->method->get_by_fingerprint == NULL))
146		return(X509_LU_FAIL);
147	return(ctx->method->get_by_fingerprint(ctx,type,bytes,len,ret));
148	}
149
150int X509_LOOKUP_by_alias(X509_LOOKUP *ctx, int type, char *str, int len,
151	     X509_OBJECT *ret)
152	{
153	if ((ctx->method == NULL) || (ctx->method->get_by_alias == NULL))
154		return(X509_LU_FAIL);
155	return(ctx->method->get_by_alias(ctx,type,str,len,ret));
156	}
157
158static unsigned long x509_object_hash(X509_OBJECT *a)
159	{
160	unsigned long h;
161
162	switch (a->type)
163		{
164	case X509_LU_X509:
165		h=X509_NAME_hash(a->data.x509->cert_info->subject);
166		break;
167	case X509_LU_CRL:
168		h=X509_NAME_hash(a->data.crl->crl->issuer);
169		break;
170	default:
171		abort();
172		}
173	return(h);
174	}
175
176static int x509_object_cmp(X509_OBJECT *a, X509_OBJECT *b)
177	{
178	int ret;
179
180	ret=(a->type - b->type);
181	if (ret) return(ret);
182	switch (a->type)
183		{
184	case X509_LU_X509:
185		ret=X509_subject_name_cmp(a->data.x509,b->data.x509);
186		break;
187	case X509_LU_CRL:
188		ret=X509_CRL_cmp(a->data.crl,b->data.crl);
189		break;
190	default:
191		abort();
192		}
193	return(ret);
194	}
195
196X509_STORE *X509_STORE_new(void)
197	{
198	X509_STORE *ret;
199
200	if ((ret=(X509_STORE *)Malloc(sizeof(X509_STORE))) == NULL)
201		return(NULL);
202	ret->certs=lh_new(x509_object_hash,x509_object_cmp);
203	ret->cache=1;
204	ret->get_cert_methods=sk_X509_LOOKUP_new_null();
205	ret->verify=NULL;
206	ret->verify_cb=NULL;
207	memset(&ret->ex_data,0,sizeof(CRYPTO_EX_DATA));
208	ret->references=1;
209	ret->depth=0;
210	return(ret);
211	}
212
213static void cleanup(X509_OBJECT *a)
214	{
215	if (a->type == X509_LU_X509)
216		{
217		X509_free(a->data.x509);
218		}
219	else if (a->type == X509_LU_CRL)
220		{
221		X509_CRL_free(a->data.crl);
222		}
223	else
224		abort();
225
226	Free(a);
227	}
228
229void X509_STORE_free(X509_STORE *vfy)
230	{
231	int i;
232	STACK_OF(X509_LOOKUP) *sk;
233	X509_LOOKUP *lu;
234
235	if(vfy == NULL)
236	    return;
237
238	sk=vfy->get_cert_methods;
239	for (i=0; i<sk_X509_LOOKUP_num(sk); i++)
240		{
241		lu=sk_X509_LOOKUP_value(sk,i);
242		X509_LOOKUP_shutdown(lu);
243		X509_LOOKUP_free(lu);
244		}
245	sk_X509_LOOKUP_free(sk);
246
247	CRYPTO_free_ex_data(x509_store_meth,vfy,&vfy->ex_data);
248	lh_doall(vfy->certs,cleanup);
249	lh_free(vfy->certs);
250	Free(vfy);
251	}
252
253X509_LOOKUP *X509_STORE_add_lookup(X509_STORE *v, X509_LOOKUP_METHOD *m)
254	{
255	int i;
256	STACK_OF(X509_LOOKUP) *sk;
257	X509_LOOKUP *lu;
258
259	sk=v->get_cert_methods;
260	for (i=0; i<sk_X509_LOOKUP_num(sk); i++)
261		{
262		lu=sk_X509_LOOKUP_value(sk,i);
263		if (m == lu->method)
264			{
265			return(lu);
266			}
267		}
268	/* a new one */
269	lu=X509_LOOKUP_new(m);
270	if (lu == NULL)
271		return(NULL);
272	else
273		{
274		lu->store_ctx=v;
275		if (sk_X509_LOOKUP_push(v->get_cert_methods,lu))
276			return(lu);
277		else
278			{
279			X509_LOOKUP_free(lu);
280			return(NULL);
281			}
282		}
283	}
284
285int X509_STORE_get_by_subject(X509_STORE_CTX *vs, int type, X509_NAME *name,
286	     X509_OBJECT *ret)
287	{
288	X509_STORE *ctx=vs->ctx;
289	X509_LOOKUP *lu;
290	X509_OBJECT stmp,*tmp;
291	int i,j;
292
293	tmp=X509_OBJECT_retrieve_by_subject(ctx->certs,type,name);
294
295	if (tmp == NULL)
296		{
297		for (i=vs->current_method; i<sk_X509_LOOKUP_num(ctx->get_cert_methods); i++)
298			{
299			lu=sk_X509_LOOKUP_value(ctx->get_cert_methods,i);
300			j=X509_LOOKUP_by_subject(lu,type,name,&stmp);
301			if (j < 0)
302				{
303				vs->current_method=j;
304				return(j);
305				}
306			else if (j)
307				{
308				tmp= &stmp;
309				break;
310				}
311			}
312		vs->current_method=0;
313		if (tmp == NULL)
314			return(0);
315		}
316
317/*	if (ret->data.ptr != NULL)
318		X509_OBJECT_free_contents(ret); */
319
320	ret->type=tmp->type;
321	ret->data.ptr=tmp->data.ptr;
322
323	X509_OBJECT_up_ref_count(ret);
324
325	return(1);
326	}
327
328void X509_OBJECT_up_ref_count(X509_OBJECT *a)
329	{
330	switch (a->type)
331		{
332	case X509_LU_X509:
333		CRYPTO_add(&a->data.x509->references,1,CRYPTO_LOCK_X509);
334		break;
335	case X509_LU_CRL:
336		CRYPTO_add(&a->data.crl->references,1,CRYPTO_LOCK_X509_CRL);
337		break;
338		}
339	}
340
341void X509_OBJECT_free_contents(X509_OBJECT *a)
342	{
343	switch (a->type)
344		{
345	case X509_LU_X509:
346		X509_free(a->data.x509);
347		break;
348	case X509_LU_CRL:
349		X509_CRL_free(a->data.crl);
350		break;
351		}
352	}
353
354X509_OBJECT *X509_OBJECT_retrieve_by_subject(LHASH *h, int type,
355	     X509_NAME *name)
356	{
357	X509_OBJECT stmp,*tmp;
358	X509 x509_s;
359	X509_CINF cinf_s;
360	X509_CRL crl_s;
361	X509_CRL_INFO crl_info_s;
362
363	stmp.type=type;
364	switch (type)
365		{
366	case X509_LU_X509:
367		stmp.data.x509= &x509_s;
368		x509_s.cert_info= &cinf_s;
369		cinf_s.subject=name;
370		break;
371	case X509_LU_CRL:
372		stmp.data.crl= &crl_s;
373		crl_s.crl= &crl_info_s;
374		crl_info_s.issuer=name;
375		break;
376	default:
377		abort();
378		}
379
380	tmp=(X509_OBJECT *)lh_retrieve(h,&stmp);
381	return(tmp);
382	}
383
384X509_STORE_CTX *X509_STORE_CTX_new(void)
385{
386	X509_STORE_CTX *ctx;
387	ctx = (X509_STORE_CTX *)Malloc(sizeof(X509_STORE_CTX));
388	if(ctx) memset(ctx, 0, sizeof(X509_STORE_CTX));
389	return ctx;
390}
391
392void X509_STORE_CTX_free(X509_STORE_CTX *ctx)
393{
394	X509_STORE_CTX_cleanup(ctx);
395	Free(ctx);
396}
397
398void X509_STORE_CTX_init(X509_STORE_CTX *ctx, X509_STORE *store, X509 *x509,
399	     STACK_OF(X509) *chain)
400	{
401	ctx->ctx=store;
402	ctx->current_method=0;
403	ctx->cert=x509;
404	ctx->untrusted=chain;
405	ctx->last_untrusted=0;
406	ctx->purpose=0;
407	ctx->trust=0;
408	ctx->valid=0;
409	ctx->chain=NULL;
410	ctx->depth=9;
411	ctx->error=0;
412	ctx->current_cert=NULL;
413	memset(&(ctx->ex_data),0,sizeof(CRYPTO_EX_DATA));
414	}
415
416void X509_STORE_CTX_cleanup(X509_STORE_CTX *ctx)
417	{
418	if (ctx->chain != NULL)
419		{
420		sk_X509_pop_free(ctx->chain,X509_free);
421		ctx->chain=NULL;
422		}
423	CRYPTO_free_ex_data(x509_store_ctx_meth,ctx,&(ctx->ex_data));
424	memset(&ctx->ex_data,0,sizeof(CRYPTO_EX_DATA));
425	}
426
427IMPLEMENT_STACK_OF(X509_LOOKUP)
428