1/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
2 * project 2006.
3 */
4/* ====================================================================
5 * Copyright (c) 2006 The OpenSSL Project.  All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 *
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 *
14 * 2. Redistributions in binary form must reproduce the above copyright
15 *    notice, this list of conditions and the following disclaimer in
16 *    the documentation and/or other materials provided with the
17 *    distribution.
18 *
19 * 3. All advertising materials mentioning features or use of this
20 *    software must display the following acknowledgment:
21 *    "This product includes software developed by the OpenSSL Project
22 *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
23 *
24 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
25 *    endorse or promote products derived from this software without
26 *    prior written permission. For written permission, please contact
27 *    licensing@OpenSSL.org.
28 *
29 * 5. Products derived from this software may not be called "OpenSSL"
30 *    nor may "OpenSSL" appear in their names without prior written
31 *    permission of the OpenSSL Project.
32 *
33 * 6. Redistributions of any form whatsoever must retain the following
34 *    acknowledgment:
35 *    "This product includes software developed by the OpenSSL Project
36 *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
37 *
38 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
39 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
40 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
41 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
42 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
43 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
44 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
45 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
46 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
47 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
48 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
49 * OF THE POSSIBILITY OF SUCH DAMAGE.
50 * ====================================================================
51 *
52 * This product includes cryptographic software written by Eric Young
53 * (eay@cryptsoft.com).  This product includes software written by Tim
54 * Hudson (tjh@cryptsoft.com).
55 *
56 */
57
58#include <stdio.h>
59#include <openssl/local/cryptlib.h>
60#include <openssl/asn1t.h>
61#include <openssl/x509.h>
62#ifndef OPENSSL_NO_ENGINE
63#include <openssl/engine.h>
64#endif
65#include "asn1_locl.h"
66
67extern const EVP_PKEY_ASN1_METHOD rsa_asn1_meths[];
68extern const EVP_PKEY_ASN1_METHOD dsa_asn1_meths[];
69extern const EVP_PKEY_ASN1_METHOD dh_asn1_meth;
70extern const EVP_PKEY_ASN1_METHOD eckey_asn1_meth;
71extern const EVP_PKEY_ASN1_METHOD hmac_asn1_meth;
72
73/* Keep this sorted in type order !! */
74static const EVP_PKEY_ASN1_METHOD *standard_methods[] =
75	{
76#ifndef OPENSSL_NO_RSA
77	&rsa_asn1_meths[0],
78	&rsa_asn1_meths[1],
79#endif
80#ifndef OPENSSL_NO_DH
81	&dh_asn1_meth,
82#endif
83#ifndef OPENSSL_NO_DSA
84	&dsa_asn1_meths[0],
85	&dsa_asn1_meths[1],
86	&dsa_asn1_meths[2],
87	&dsa_asn1_meths[3],
88	&dsa_asn1_meths[4],
89#endif
90#ifndef OPENSSL_NO_EC
91	&eckey_asn1_meth,
92#endif
93	&hmac_asn1_meth
94	};
95
96typedef int sk_cmp_fn_type(const char * const *a, const char * const *b);
97DECLARE_STACK_OF(EVP_PKEY_ASN1_METHOD)
98static STACK_OF(EVP_PKEY_ASN1_METHOD) *app_methods = NULL;
99
100
101
102#ifdef TEST
103void main()
104	{
105	int i;
106	for (i = 0;
107		i < sizeof(standard_methods)/sizeof(EVP_PKEY_ASN1_METHOD *);
108		i++)
109		fprintf(stderr, "Number %d id=%d (%s)\n", i,
110			standard_methods[i]->pkey_id,
111			OBJ_nid2sn(standard_methods[i]->pkey_id));
112	}
113#endif
114
115DECLARE_OBJ_BSEARCH_CMP_FN(const EVP_PKEY_ASN1_METHOD *,
116			   const EVP_PKEY_ASN1_METHOD *, ameth);
117
118static int ameth_cmp(const EVP_PKEY_ASN1_METHOD * const *a,
119		     const EVP_PKEY_ASN1_METHOD * const *b)
120	{
121        return ((*a)->pkey_id - (*b)->pkey_id);
122	}
123
124IMPLEMENT_OBJ_BSEARCH_CMP_FN(const EVP_PKEY_ASN1_METHOD *,
125			     const EVP_PKEY_ASN1_METHOD *, ameth);
126
127int EVP_PKEY_asn1_get_count(void)
128	{
129	int num = sizeof(standard_methods)/sizeof(EVP_PKEY_ASN1_METHOD *);
130	if (app_methods)
131		num += sk_EVP_PKEY_ASN1_METHOD_num(app_methods);
132	return num;
133	}
134
135const EVP_PKEY_ASN1_METHOD *EVP_PKEY_asn1_get0(int idx)
136	{
137	int num = sizeof(standard_methods)/sizeof(EVP_PKEY_ASN1_METHOD *);
138	if (idx < 0)
139		return NULL;
140	if (idx < num)
141		return standard_methods[idx];
142	idx -= num;
143	return sk_EVP_PKEY_ASN1_METHOD_value(app_methods, idx);
144	}
145
146static const EVP_PKEY_ASN1_METHOD *pkey_asn1_find(int type)
147	{
148	EVP_PKEY_ASN1_METHOD tmp;
149	const EVP_PKEY_ASN1_METHOD *t = &tmp, **ret;
150	tmp.pkey_id = type;
151	if (app_methods)
152		{
153		int idx;
154		idx = sk_EVP_PKEY_ASN1_METHOD_find(app_methods, &tmp);
155		if (idx >= 0)
156			return sk_EVP_PKEY_ASN1_METHOD_value(app_methods, idx);
157		}
158	ret = OBJ_bsearch_ameth(&t, standard_methods,
159			  sizeof(standard_methods)
160			  /sizeof(EVP_PKEY_ASN1_METHOD *));
161	if (!ret || !*ret)
162		return NULL;
163	return *ret;
164	}
165
166/* Find an implementation of an ASN1 algorithm. If 'pe' is not NULL
167 * also search through engines and set *pe to a functional reference
168 * to the engine implementing 'type' or NULL if no engine implements
169 * it.
170 */
171
172const EVP_PKEY_ASN1_METHOD *EVP_PKEY_asn1_find(ENGINE **pe, int type)
173	{
174	const EVP_PKEY_ASN1_METHOD *t;
175
176	for (;;)
177		{
178		t = pkey_asn1_find(type);
179		if (!t || !(t->pkey_flags & ASN1_PKEY_ALIAS))
180			break;
181		type = t->pkey_base_id;
182		}
183	if (pe)
184		{
185#ifndef OPENSSL_NO_ENGINE
186		ENGINE *e;
187		/* type will contain the final unaliased type */
188		e = ENGINE_get_pkey_asn1_meth_engine(type);
189		if (e)
190			{
191			*pe = e;
192			return ENGINE_get_pkey_asn1_meth(e, type);
193			}
194#endif
195		*pe = NULL;
196		}
197	return t;
198	}
199
200const EVP_PKEY_ASN1_METHOD *EVP_PKEY_asn1_find_str(ENGINE **pe,
201					const char *str, int len)
202	{
203	int i;
204	const EVP_PKEY_ASN1_METHOD *ameth;
205	if (len == -1)
206		len = strlen(str);
207	if (pe)
208		{
209#ifndef OPENSSL_NO_ENGINE
210		ENGINE *e;
211		ameth = ENGINE_pkey_asn1_find_str(&e, str, len);
212		if (ameth)
213			{
214			/* Convert structural into
215			 * functional reference
216			 */
217			if (!ENGINE_init(e))
218				ameth = NULL;
219			ENGINE_free(e);
220			*pe = e;
221			return ameth;
222			}
223#endif
224		*pe = NULL;
225		}
226	for (i = 0; i < EVP_PKEY_asn1_get_count(); i++)
227		{
228		ameth = EVP_PKEY_asn1_get0(i);
229		if (ameth->pkey_flags & ASN1_PKEY_ALIAS)
230			continue;
231		if (((int)strlen(ameth->pem_str) == len) &&
232			!strncasecmp(ameth->pem_str, str, len))
233			return ameth;
234		}
235	return NULL;
236	}
237
238int EVP_PKEY_asn1_add0(const EVP_PKEY_ASN1_METHOD *ameth)
239	{
240	if (app_methods == NULL)
241		{
242		app_methods = sk_EVP_PKEY_ASN1_METHOD_new(ameth_cmp);
243		if (!app_methods)
244			return 0;
245		}
246	if (!sk_EVP_PKEY_ASN1_METHOD_push(app_methods, ameth))
247		return 0;
248	sk_EVP_PKEY_ASN1_METHOD_sort(app_methods);
249	return 1;
250	}
251
252int EVP_PKEY_asn1_add_alias(int to, int from)
253	{
254	EVP_PKEY_ASN1_METHOD *ameth;
255	ameth = EVP_PKEY_asn1_new(from, ASN1_PKEY_ALIAS, NULL, NULL);
256	if (!ameth)
257		return 0;
258	ameth->pkey_base_id = to;
259	return EVP_PKEY_asn1_add0(ameth);
260	}
261
262int EVP_PKEY_asn1_get0_info(int *ppkey_id, int *ppkey_base_id, int *ppkey_flags,
263				const char **pinfo, const char **ppem_str,
264					const EVP_PKEY_ASN1_METHOD *ameth)
265	{
266	if (!ameth)
267		return 0;
268	if (ppkey_id)
269		*ppkey_id = ameth->pkey_id;
270	if (ppkey_base_id)
271		*ppkey_base_id = ameth->pkey_base_id;
272	if (ppkey_flags)
273		*ppkey_flags = ameth->pkey_flags;
274	if (pinfo)
275		*pinfo = ameth->info;
276	if (ppem_str)
277		*ppem_str = ameth->pem_str;
278	return 1;
279	}
280
281const EVP_PKEY_ASN1_METHOD* EVP_PKEY_get0_asn1(EVP_PKEY *pkey)
282	{
283	return pkey->ameth;
284	}
285
286EVP_PKEY_ASN1_METHOD* EVP_PKEY_asn1_new(int id, int flags,
287					const char *pem_str, const char *info)
288	{
289	EVP_PKEY_ASN1_METHOD *ameth;
290	ameth = OPENSSL_malloc(sizeof(EVP_PKEY_ASN1_METHOD));
291	if (!ameth)
292		return NULL;
293
294	ameth->pkey_id = id;
295	ameth->pkey_base_id = id;
296	ameth->pkey_flags = flags | ASN1_PKEY_DYNAMIC;
297
298	if (info)
299		{
300		ameth->info = BUF_strdup(info);
301		if (!ameth->info)
302			goto err;
303		}
304	else
305		ameth->info = NULL;
306
307	if (pem_str)
308		{
309		ameth->pem_str = BUF_strdup(pem_str);
310		if (!ameth->pem_str)
311			goto err;
312		}
313	else
314		ameth->pem_str = NULL;
315
316	ameth->pub_decode = 0;
317	ameth->pub_encode = 0;
318	ameth->pub_cmp = 0;
319	ameth->pub_print = 0;
320
321	ameth->priv_decode = 0;
322	ameth->priv_encode = 0;
323	ameth->priv_print = 0;
324
325	ameth->old_priv_encode = 0;
326	ameth->old_priv_decode = 0;
327
328	ameth->pkey_size = 0;
329	ameth->pkey_bits = 0;
330
331	ameth->param_decode = 0;
332	ameth->param_encode = 0;
333	ameth->param_missing = 0;
334	ameth->param_copy = 0;
335	ameth->param_cmp = 0;
336	ameth->param_print = 0;
337
338	ameth->pkey_free = 0;
339	ameth->pkey_ctrl = 0;
340
341	return ameth;
342
343	err:
344
345	EVP_PKEY_asn1_free(ameth);
346	return NULL;
347
348	}
349
350void EVP_PKEY_asn1_copy(EVP_PKEY_ASN1_METHOD *dst,
351			const EVP_PKEY_ASN1_METHOD *src)
352	{
353
354	dst->pub_decode = src->pub_decode;
355	dst->pub_encode = src->pub_encode;
356	dst->pub_cmp = src->pub_cmp;
357	dst->pub_print = src->pub_print;
358
359	dst->priv_decode = src->priv_decode;
360	dst->priv_encode = src->priv_encode;
361	dst->priv_print = src->priv_print;
362
363	dst->old_priv_encode = src->old_priv_encode;
364	dst->old_priv_decode = src->old_priv_decode;
365
366	dst->pkey_size = src->pkey_size;
367	dst->pkey_bits = src->pkey_bits;
368
369	dst->param_decode = src->param_decode;
370	dst->param_encode = src->param_encode;
371	dst->param_missing = src->param_missing;
372	dst->param_copy = src->param_copy;
373	dst->param_cmp = src->param_cmp;
374	dst->param_print = src->param_print;
375
376	dst->pkey_free = src->pkey_free;
377	dst->pkey_ctrl = src->pkey_ctrl;
378
379	}
380
381void EVP_PKEY_asn1_free(EVP_PKEY_ASN1_METHOD *ameth)
382	{
383	if (ameth && (ameth->pkey_flags & ASN1_PKEY_DYNAMIC))
384		{
385		if (ameth->pem_str)
386			OPENSSL_free(ameth->pem_str);
387		if (ameth->info)
388			OPENSSL_free(ameth->info);
389		OPENSSL_free(ameth);
390		}
391	}
392
393void EVP_PKEY_asn1_set_public(EVP_PKEY_ASN1_METHOD *ameth,
394		int (*pub_decode)(EVP_PKEY *pk, X509_PUBKEY *pub),
395		int (*pub_encode)(X509_PUBKEY *pub, const EVP_PKEY *pk),
396		int (*pub_cmp)(const EVP_PKEY *a, const EVP_PKEY *b),
397		int (*pub_print)(BIO *out, const EVP_PKEY *pkey, int indent,
398							ASN1_PCTX *pctx),
399		int (*pkey_size)(const EVP_PKEY *pk),
400		int (*pkey_bits)(const EVP_PKEY *pk))
401	{
402	ameth->pub_decode = pub_decode;
403	ameth->pub_encode = pub_encode;
404	ameth->pub_cmp = pub_cmp;
405	ameth->pub_print = pub_print;
406	ameth->pkey_size = pkey_size;
407	ameth->pkey_bits = pkey_bits;
408	}
409
410void EVP_PKEY_asn1_set_private(EVP_PKEY_ASN1_METHOD *ameth,
411		int (*priv_decode)(EVP_PKEY *pk, PKCS8_PRIV_KEY_INFO *p8inf),
412		int (*priv_encode)(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pk),
413		int (*priv_print)(BIO *out, const EVP_PKEY *pkey, int indent,
414							ASN1_PCTX *pctx))
415	{
416	ameth->priv_decode = priv_decode;
417	ameth->priv_encode = priv_encode;
418	ameth->priv_print = priv_print;
419	}
420
421void EVP_PKEY_asn1_set_param(EVP_PKEY_ASN1_METHOD *ameth,
422		int (*param_decode)(EVP_PKEY *pkey,
423				const unsigned char **pder, int derlen),
424		int (*param_encode)(const EVP_PKEY *pkey, unsigned char **pder),
425		int (*param_missing)(const EVP_PKEY *pk),
426		int (*param_copy)(EVP_PKEY *to, const EVP_PKEY *from),
427		int (*param_cmp)(const EVP_PKEY *a, const EVP_PKEY *b),
428		int (*param_print)(BIO *out, const EVP_PKEY *pkey, int indent,
429							ASN1_PCTX *pctx))
430	{
431	ameth->param_decode = param_decode;
432	ameth->param_encode = param_encode;
433	ameth->param_missing = param_missing;
434	ameth->param_copy = param_copy;
435	ameth->param_cmp = param_cmp;
436	ameth->param_print = param_print;
437	}
438
439void EVP_PKEY_asn1_set_free(EVP_PKEY_ASN1_METHOD *ameth,
440		void (*pkey_free)(EVP_PKEY *pkey))
441	{
442	ameth->pkey_free = pkey_free;
443	}
444
445void EVP_PKEY_asn1_set_ctrl(EVP_PKEY_ASN1_METHOD *ameth,
446		int (*pkey_ctrl)(EVP_PKEY *pkey, int op,
447							long arg1, void *arg2))
448	{
449	ameth->pkey_ctrl = pkey_ctrl;
450	}
451