1/* crypto/asn1/x_pubkey.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/asn1t.h>
62#include <openssl/x509.h>
63
64/* Minor tweak to operation: free up EVP_PKEY */
65static int pubkey_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it)
66{
67	if(operation == ASN1_OP_FREE_POST) {
68		X509_PUBKEY *pubkey = (X509_PUBKEY *)*pval;
69		EVP_PKEY_free(pubkey->pkey);
70	}
71	return 1;
72}
73
74ASN1_SEQUENCE_cb(X509_PUBKEY, pubkey_cb) = {
75	ASN1_SIMPLE(X509_PUBKEY, algor, X509_ALGOR),
76	ASN1_SIMPLE(X509_PUBKEY, public_key, ASN1_BIT_STRING)
77} ASN1_SEQUENCE_END_cb(X509_PUBKEY, X509_PUBKEY)
78
79IMPLEMENT_ASN1_FUNCTIONS(X509_PUBKEY)
80
81int X509_PUBKEY_set(X509_PUBKEY **x, EVP_PKEY *pkey)
82	{
83	X509_PUBKEY *pk=NULL;
84	X509_ALGOR *a;
85	ASN1_OBJECT *o;
86	unsigned char *s,*p = NULL;
87	int i;
88
89	if (x == NULL) return(0);
90
91	if ((pk=X509_PUBKEY_new()) == NULL) goto err;
92	a=pk->algor;
93
94	/* set the algorithm id */
95	if ((o=OBJ_nid2obj(pkey->type)) == NULL) goto err;
96	ASN1_OBJECT_free(a->algorithm);
97	a->algorithm=o;
98
99	/* Set the parameter list */
100	if (!pkey->save_parameters || (pkey->type == EVP_PKEY_RSA))
101		{
102		if ((a->parameter == NULL) ||
103			(a->parameter->type != V_ASN1_NULL))
104			{
105			ASN1_TYPE_free(a->parameter);
106			if (!(a->parameter=ASN1_TYPE_new()))
107				{
108				X509err(X509_F_X509_PUBKEY_SET,ERR_R_MALLOC_FAILURE);
109				goto err;
110				}
111			a->parameter->type=V_ASN1_NULL;
112			}
113		}
114	else
115#ifndef OPENSSL_NO_DSA
116		if (pkey->type == EVP_PKEY_DSA)
117		{
118		unsigned char *pp;
119		DSA *dsa;
120
121		dsa=pkey->pkey.dsa;
122		dsa->write_params=0;
123		ASN1_TYPE_free(a->parameter);
124		if ((i=i2d_DSAparams(dsa,NULL)) <= 0)
125			goto err;
126		if (!(p=(unsigned char *)OPENSSL_malloc(i)))
127			{
128			X509err(X509_F_X509_PUBKEY_SET,ERR_R_MALLOC_FAILURE);
129			goto err;
130			}
131		pp=p;
132		i2d_DSAparams(dsa,&pp);
133		if (!(a->parameter=ASN1_TYPE_new()))
134			{
135			OPENSSL_free(p);
136			X509err(X509_F_X509_PUBKEY_SET,ERR_R_MALLOC_FAILURE);
137			goto err;
138			}
139		a->parameter->type=V_ASN1_SEQUENCE;
140		if (!(a->parameter->value.sequence=ASN1_STRING_new()))
141			{
142			OPENSSL_free(p);
143			X509err(X509_F_X509_PUBKEY_SET,ERR_R_MALLOC_FAILURE);
144			goto err;
145			}
146		if (!ASN1_STRING_set(a->parameter->value.sequence,p,i))
147			{
148			OPENSSL_free(p);
149			X509err(X509_F_X509_PUBKEY_SET,ERR_R_MALLOC_FAILURE);
150			goto err;
151			}
152		OPENSSL_free(p);
153		}
154	else
155#endif
156		{
157		X509err(X509_F_X509_PUBKEY_SET,X509_R_UNSUPPORTED_ALGORITHM);
158		goto err;
159		}
160
161	if ((i=i2d_PublicKey(pkey,NULL)) <= 0) goto err;
162	if ((s=(unsigned char *)OPENSSL_malloc(i+1)) == NULL)
163		{
164		X509err(X509_F_X509_PUBKEY_SET,ERR_R_MALLOC_FAILURE);
165		goto err;
166		}
167	p=s;
168	i2d_PublicKey(pkey,&p);
169	if (!M_ASN1_BIT_STRING_set(pk->public_key,s,i))
170		{
171		X509err(X509_F_X509_PUBKEY_SET,ERR_R_MALLOC_FAILURE);
172		goto err;
173		}
174	/* Set number of unused bits to zero */
175	pk->public_key->flags&= ~(ASN1_STRING_FLAG_BITS_LEFT|0x07);
176	pk->public_key->flags|=ASN1_STRING_FLAG_BITS_LEFT;
177
178	OPENSSL_free(s);
179
180#if 0
181	CRYPTO_add(&pkey->references,1,CRYPTO_LOCK_EVP_PKEY);
182	pk->pkey=pkey;
183#endif
184
185	if (*x != NULL)
186		X509_PUBKEY_free(*x);
187
188	*x=pk;
189
190	return 1;
191err:
192	if (pk != NULL) X509_PUBKEY_free(pk);
193	return 0;
194	}
195
196EVP_PKEY *X509_PUBKEY_get(X509_PUBKEY *key)
197	{
198	EVP_PKEY *ret=NULL;
199	long j;
200	int type;
201	unsigned char *p;
202#ifndef OPENSSL_NO_DSA
203	const unsigned char *cp;
204	X509_ALGOR *a;
205#endif
206
207	if (key == NULL) goto err;
208
209	if (key->pkey != NULL)
210	    {
211	    CRYPTO_add(&key->pkey->references,1,CRYPTO_LOCK_EVP_PKEY);
212	    return(key->pkey);
213	    }
214
215	if (key->public_key == NULL) goto err;
216
217	type=OBJ_obj2nid(key->algor->algorithm);
218	p=key->public_key->data;
219        j=key->public_key->length;
220        if ((ret=d2i_PublicKey(type,NULL,&p,(long)j)) == NULL)
221		{
222		X509err(X509_F_X509_PUBKEY_GET,X509_R_ERR_ASN1_LIB);
223		goto err;
224		}
225	ret->save_parameters=0;
226
227#ifndef OPENSSL_NO_DSA
228	a=key->algor;
229	if (ret->type == EVP_PKEY_DSA)
230		{
231		if (a->parameter && (a->parameter->type == V_ASN1_SEQUENCE))
232			{
233			ret->pkey.dsa->write_params=0;
234			cp=p=a->parameter->value.sequence->data;
235			j=a->parameter->value.sequence->length;
236			if (!d2i_DSAparams(&ret->pkey.dsa,&cp,(long)j))
237				goto err;
238			}
239		ret->save_parameters=1;
240		}
241#endif
242	key->pkey=ret;
243	CRYPTO_add(&ret->references,1,CRYPTO_LOCK_EVP_PKEY);
244	return(ret);
245err:
246	if (ret != NULL)
247		EVP_PKEY_free(ret);
248	return(NULL);
249	}
250
251/* Now two pseudo ASN1 routines that take an EVP_PKEY structure
252 * and encode or decode as X509_PUBKEY
253 */
254
255EVP_PKEY *d2i_PUBKEY(EVP_PKEY **a, unsigned char **pp,
256	     long length)
257{
258	X509_PUBKEY *xpk;
259	EVP_PKEY *pktmp;
260	xpk = d2i_X509_PUBKEY(NULL, pp, length);
261	if(!xpk) return NULL;
262	pktmp = X509_PUBKEY_get(xpk);
263	X509_PUBKEY_free(xpk);
264	if(!pktmp) return NULL;
265	if(a) {
266		EVP_PKEY_free(*a);
267		*a = pktmp;
268	}
269	return pktmp;
270}
271
272int i2d_PUBKEY(EVP_PKEY *a, unsigned char **pp)
273{
274	X509_PUBKEY *xpk=NULL;
275	int ret;
276	if(!a) return 0;
277	if(!X509_PUBKEY_set(&xpk, a)) return 0;
278	ret = i2d_X509_PUBKEY(xpk, pp);
279	X509_PUBKEY_free(xpk);
280	return ret;
281}
282
283/* The following are equivalents but which return RSA and DSA
284 * keys
285 */
286#ifndef OPENSSL_NO_RSA
287RSA *d2i_RSA_PUBKEY(RSA **a, unsigned char **pp,
288	     long length)
289{
290	EVP_PKEY *pkey;
291	RSA *key;
292	unsigned char *q;
293	q = *pp;
294	pkey = d2i_PUBKEY(NULL, &q, length);
295	if(!pkey) return NULL;
296	key = EVP_PKEY_get1_RSA(pkey);
297	EVP_PKEY_free(pkey);
298	if(!key) return NULL;
299	*pp = q;
300	if(a) {
301		RSA_free(*a);
302		*a = key;
303	}
304	return key;
305}
306
307int i2d_RSA_PUBKEY(RSA *a, unsigned char **pp)
308{
309	EVP_PKEY *pktmp;
310	int ret;
311	if(!a) return 0;
312	pktmp = EVP_PKEY_new();
313	if(!pktmp) {
314		ASN1err(ASN1_F_I2D_RSA_PUBKEY, ERR_R_MALLOC_FAILURE);
315		return 0;
316	}
317	EVP_PKEY_set1_RSA(pktmp, a);
318	ret = i2d_PUBKEY(pktmp, pp);
319	EVP_PKEY_free(pktmp);
320	return ret;
321}
322#endif
323
324#ifndef OPENSSL_NO_DSA
325DSA *d2i_DSA_PUBKEY(DSA **a, unsigned char **pp,
326	     long length)
327{
328	EVP_PKEY *pkey;
329	DSA *key;
330	unsigned char *q;
331	q = *pp;
332	pkey = d2i_PUBKEY(NULL, &q, length);
333	if(!pkey) return NULL;
334	key = EVP_PKEY_get1_DSA(pkey);
335	EVP_PKEY_free(pkey);
336	if(!key) return NULL;
337	*pp = q;
338	if(a) {
339		DSA_free(*a);
340		*a = key;
341	}
342	return key;
343}
344
345int i2d_DSA_PUBKEY(DSA *a, unsigned char **pp)
346{
347	EVP_PKEY *pktmp;
348	int ret;
349	if(!a) return 0;
350	pktmp = EVP_PKEY_new();
351	if(!pktmp) {
352		ASN1err(ASN1_F_I2D_DSA_PUBKEY, ERR_R_MALLOC_FAILURE);
353		return 0;
354	}
355	EVP_PKEY_set1_DSA(pktmp, a);
356	ret = i2d_PUBKEY(pktmp, pp);
357	EVP_PKEY_free(pktmp);
358	return ret;
359}
360#endif
361