1/* crypto/asn1/a_sign.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 * Copyright (c) 1998-2003 The OpenSSL Project.  All rights reserved.
60 *
61 * Redistribution and use in source and binary forms, with or without
62 * modification, are permitted provided that the following conditions
63 * are met:
64 *
65 * 1. Redistributions of source code must retain the above copyright
66 *    notice, this list of conditions and the following disclaimer.
67 *
68 * 2. Redistributions in binary form must reproduce the above copyright
69 *    notice, this list of conditions and the following disclaimer in
70 *    the documentation and/or other materials provided with the
71 *    distribution.
72 *
73 * 3. All advertising materials mentioning features or use of this
74 *    software must display the following acknowledgment:
75 *    "This product includes software developed by the OpenSSL Project
76 *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
77 *
78 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
79 *    endorse or promote products derived from this software without
80 *    prior written permission. For written permission, please contact
81 *    openssl-core@openssl.org.
82 *
83 * 5. Products derived from this software may not be called "OpenSSL"
84 *    nor may "OpenSSL" appear in their names without prior written
85 *    permission of the OpenSSL Project.
86 *
87 * 6. Redistributions of any form whatsoever must retain the following
88 *    acknowledgment:
89 *    "This product includes software developed by the OpenSSL Project
90 *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
91 *
92 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
93 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
94 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
95 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
96 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
97 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
98 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
99 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
100 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
101 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
102 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
103 * OF THE POSSIBILITY OF SUCH DAMAGE.
104 * ====================================================================
105 *
106 * This product includes cryptographic software written by Eric Young
107 * (eay@cryptsoft.com).  This product includes software written by Tim
108 * Hudson (tjh@cryptsoft.com).
109 *
110 */
111
112#include <stdio.h>
113#include <time.h>
114
115#include "cryptlib.h"
116
117#ifndef NO_SYS_TYPES_H
118# include <sys/types.h>
119#endif
120
121#include <openssl/bn.h>
122#include <openssl/evp.h>
123#include <openssl/x509.h>
124#include <openssl/objects.h>
125#include <openssl/buffer.h>
126
127#ifndef NO_ASN1_OLD
128
129int ASN1_sign(i2d_of_void *i2d, X509_ALGOR *algor1, X509_ALGOR *algor2,
130	      ASN1_BIT_STRING *signature, char *data, EVP_PKEY *pkey,
131	      const EVP_MD *type)
132	{
133	EVP_MD_CTX ctx;
134	unsigned char *p,*buf_in=NULL,*buf_out=NULL;
135	int i,inl=0,outl=0,outll=0;
136	X509_ALGOR *a;
137
138	EVP_MD_CTX_init(&ctx);
139	for (i=0; i<2; i++)
140		{
141		if (i == 0)
142			a=algor1;
143		else
144			a=algor2;
145		if (a == NULL) continue;
146                if (type->pkey_type == NID_dsaWithSHA1)
147			{
148			/* special case: RFC 2459 tells us to omit 'parameters'
149			 * with id-dsa-with-sha1 */
150			ASN1_TYPE_free(a->parameter);
151			a->parameter = NULL;
152			}
153		else if ((a->parameter == NULL) ||
154			(a->parameter->type != V_ASN1_NULL))
155			{
156			ASN1_TYPE_free(a->parameter);
157			if ((a->parameter=ASN1_TYPE_new()) == NULL) goto err;
158			a->parameter->type=V_ASN1_NULL;
159			}
160		ASN1_OBJECT_free(a->algorithm);
161		a->algorithm=OBJ_nid2obj(type->pkey_type);
162		if (a->algorithm == NULL)
163			{
164			ASN1err(ASN1_F_ASN1_SIGN,ASN1_R_UNKNOWN_OBJECT_TYPE);
165			goto err;
166			}
167		if (a->algorithm->length == 0)
168			{
169			ASN1err(ASN1_F_ASN1_SIGN,ASN1_R_THE_ASN1_OBJECT_IDENTIFIER_IS_NOT_KNOWN_FOR_THIS_MD);
170			goto err;
171			}
172		}
173	inl=i2d(data,NULL);
174	buf_in=(unsigned char *)OPENSSL_malloc((unsigned int)inl);
175	outll=outl=EVP_PKEY_size(pkey);
176	buf_out=(unsigned char *)OPENSSL_malloc((unsigned int)outl);
177	if ((buf_in == NULL) || (buf_out == NULL))
178		{
179		outl=0;
180		ASN1err(ASN1_F_ASN1_SIGN,ERR_R_MALLOC_FAILURE);
181		goto err;
182		}
183	p=buf_in;
184
185	i2d(data,&p);
186	EVP_SignInit_ex(&ctx,type, NULL);
187	EVP_SignUpdate(&ctx,(unsigned char *)buf_in,inl);
188	if (!EVP_SignFinal(&ctx,(unsigned char *)buf_out,
189			(unsigned int *)&outl,pkey))
190		{
191		outl=0;
192		ASN1err(ASN1_F_ASN1_SIGN,ERR_R_EVP_LIB);
193		goto err;
194		}
195	if (signature->data != NULL) OPENSSL_free(signature->data);
196	signature->data=buf_out;
197	buf_out=NULL;
198	signature->length=outl;
199	/* In the interests of compatibility, I'll make sure that
200	 * the bit string has a 'not-used bits' value of 0
201	 */
202	signature->flags&= ~(ASN1_STRING_FLAG_BITS_LEFT|0x07);
203	signature->flags|=ASN1_STRING_FLAG_BITS_LEFT;
204err:
205	EVP_MD_CTX_cleanup(&ctx);
206	if (buf_in != NULL)
207		{ OPENSSL_cleanse((char *)buf_in,(unsigned int)inl); OPENSSL_free(buf_in); }
208	if (buf_out != NULL)
209		{ OPENSSL_cleanse((char *)buf_out,outll); OPENSSL_free(buf_out); }
210	return(outl);
211	}
212
213#endif
214
215int ASN1_item_sign(const ASN1_ITEM *it, X509_ALGOR *algor1, X509_ALGOR *algor2,
216	     ASN1_BIT_STRING *signature, void *asn, EVP_PKEY *pkey,
217	     const EVP_MD *type)
218	{
219	EVP_MD_CTX ctx;
220	unsigned char *buf_in=NULL,*buf_out=NULL;
221	int i,inl=0,outl=0,outll=0;
222	X509_ALGOR *a;
223
224	EVP_MD_CTX_init(&ctx);
225	for (i=0; i<2; i++)
226		{
227		if (i == 0)
228			a=algor1;
229		else
230			a=algor2;
231		if (a == NULL) continue;
232                if (type->pkey_type == NID_dsaWithSHA1 ||
233			type->pkey_type == NID_ecdsa_with_SHA1)
234			{
235			/* special case: RFC 3279 tells us to omit 'parameters'
236			 * with id-dsa-with-sha1 and ecdsa-with-SHA1 */
237			ASN1_TYPE_free(a->parameter);
238			a->parameter = NULL;
239			}
240		else if ((a->parameter == NULL) ||
241			(a->parameter->type != V_ASN1_NULL))
242			{
243			ASN1_TYPE_free(a->parameter);
244			if ((a->parameter=ASN1_TYPE_new()) == NULL) goto err;
245			a->parameter->type=V_ASN1_NULL;
246			}
247		ASN1_OBJECT_free(a->algorithm);
248		a->algorithm=OBJ_nid2obj(type->pkey_type);
249		if (a->algorithm == NULL)
250			{
251			ASN1err(ASN1_F_ASN1_ITEM_SIGN,ASN1_R_UNKNOWN_OBJECT_TYPE);
252			goto err;
253			}
254		if (a->algorithm->length == 0)
255			{
256			ASN1err(ASN1_F_ASN1_ITEM_SIGN,ASN1_R_THE_ASN1_OBJECT_IDENTIFIER_IS_NOT_KNOWN_FOR_THIS_MD);
257			goto err;
258			}
259		}
260	inl=ASN1_item_i2d(asn,&buf_in, it);
261	outll=outl=EVP_PKEY_size(pkey);
262	buf_out=(unsigned char *)OPENSSL_malloc((unsigned int)outl);
263	if ((buf_in == NULL) || (buf_out == NULL))
264		{
265		outl=0;
266		ASN1err(ASN1_F_ASN1_ITEM_SIGN,ERR_R_MALLOC_FAILURE);
267		goto err;
268		}
269
270	if (!EVP_SignInit_ex(&ctx,type, NULL))
271		{
272		outl=0;
273		ASN1err(ASN1_F_ASN1_ITEM_SIGN,ERR_R_EVP_LIB);
274		goto err;
275		}
276	EVP_SignUpdate(&ctx,(unsigned char *)buf_in,inl);
277	if (!EVP_SignFinal(&ctx,(unsigned char *)buf_out,
278			(unsigned int *)&outl,pkey))
279		{
280		outl=0;
281		ASN1err(ASN1_F_ASN1_ITEM_SIGN,ERR_R_EVP_LIB);
282		goto err;
283		}
284	if (signature->data != NULL) OPENSSL_free(signature->data);
285	signature->data=buf_out;
286	buf_out=NULL;
287	signature->length=outl;
288	/* In the interests of compatibility, I'll make sure that
289	 * the bit string has a 'not-used bits' value of 0
290	 */
291	signature->flags&= ~(ASN1_STRING_FLAG_BITS_LEFT|0x07);
292	signature->flags|=ASN1_STRING_FLAG_BITS_LEFT;
293err:
294	EVP_MD_CTX_cleanup(&ctx);
295	if (buf_in != NULL)
296		{ OPENSSL_cleanse((char *)buf_in,(unsigned int)inl); OPENSSL_free(buf_in); }
297	if (buf_out != NULL)
298		{ OPENSSL_cleanse((char *)buf_out,outll); OPENSSL_free(buf_out); }
299	return(outl);
300	}
301