1 /* crypto/asn1/a_sign.c */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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.
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).
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.
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
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)"
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
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.]
58 /* ====================================================================
59 * Copyright (c) 1998-2002 The OpenSSL Project. All rights reserved.
61 * Redistribution and use in source and binary forms, with or without
62 * modification, are permitted provided that the following conditions
65 * 1. Redistributions of source code must retain the above copyright
66 * notice, this list of conditions and the following disclaimer.
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
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/)"
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.
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.
87 * 6. Redistributions of any form whatsoever must retain the following
89 * "This product includes software developed by the OpenSSL Project
90 * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
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 * ====================================================================
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).
115 #include "cryptlib.h"
117 #ifndef NO_SYS_TYPES_H
118 # include <sys/types.h>
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>
129 int ASN1_sign(int (*i2d
)(), X509_ALGOR
*algor1
, X509_ALGOR
*algor2
,
130 ASN1_BIT_STRING
*signature
, char *data
, EVP_PKEY
*pkey
,
134 unsigned char *p
,*buf_in
=NULL
,*buf_out
=NULL
;
135 int i
,inl
=0,outl
=0,outll
=0;
138 EVP_MD_CTX_init(&ctx
);
145 if (a
== NULL
) continue;
146 if (type
->pkey_type
== NID_dsaWithSHA1
)
148 /* special case: RFC 2459 tells us to omit 'parameters'
149 * with id-dsa-with-sha1 */
150 ASN1_TYPE_free(a
->parameter
);
153 else if ((a
->parameter
== NULL
) ||
154 (a
->parameter
->type
!= V_ASN1_NULL
))
156 ASN1_TYPE_free(a
->parameter
);
157 if ((a
->parameter
=ASN1_TYPE_new()) == NULL
) goto err
;
158 a
->parameter
->type
=V_ASN1_NULL
;
160 ASN1_OBJECT_free(a
->algorithm
);
161 a
->algorithm
=OBJ_nid2obj(type
->pkey_type
);
162 if (a
->algorithm
== NULL
)
164 ASN1err(ASN1_F_ASN1_SIGN
,ASN1_R_UNKNOWN_OBJECT_TYPE
);
167 if (a
->algorithm
->length
== 0)
169 ASN1err(ASN1_F_ASN1_SIGN
,ASN1_R_THE_ASN1_OBJECT_IDENTIFIER_IS_NOT_KNOWN_FOR_THIS_MD
);
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
))
180 ASN1err(ASN1_F_ASN1_SIGN
,ERR_R_MALLOC_FAILURE
);
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
))
192 ASN1err(ASN1_F_ASN1_SIGN
,ERR_R_EVP_LIB
);
195 if (signature
->data
!= NULL
) OPENSSL_free(signature
->data
);
196 signature
->data
=buf_out
;
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
202 signature
->flags
&= ~(ASN1_STRING_FLAG_BITS_LEFT
|0x07);
203 signature
->flags
|=ASN1_STRING_FLAG_BITS_LEFT
;
205 EVP_MD_CTX_cleanup(&ctx
);
207 { OPENSSL_cleanse((char *)buf_in
,(unsigned int)inl
); OPENSSL_free(buf_in
); }
209 { OPENSSL_cleanse((char *)buf_out
,outll
); OPENSSL_free(buf_out
); }
215 int ASN1_item_sign(const ASN1_ITEM
*it
, X509_ALGOR
*algor1
, X509_ALGOR
*algor2
,
216 ASN1_BIT_STRING
*signature
, void *asn
, EVP_PKEY
*pkey
,
220 unsigned char *buf_in
=NULL
,*buf_out
=NULL
;
221 int i
,inl
=0,outl
=0,outll
=0;
224 EVP_MD_CTX_init(&ctx
);
231 if (a
== NULL
) continue;
232 if (type
->pkey_type
== NID_dsaWithSHA1
)
234 /* special case: RFC 2459 tells us to omit 'parameters'
235 * with id-dsa-with-sha1 */
236 ASN1_TYPE_free(a
->parameter
);
239 else if ((a
->parameter
== NULL
) ||
240 (a
->parameter
->type
!= V_ASN1_NULL
))
242 ASN1_TYPE_free(a
->parameter
);
243 if ((a
->parameter
=ASN1_TYPE_new()) == NULL
) goto err
;
244 a
->parameter
->type
=V_ASN1_NULL
;
246 ASN1_OBJECT_free(a
->algorithm
);
247 a
->algorithm
=OBJ_nid2obj(type
->pkey_type
);
248 if (a
->algorithm
== NULL
)
250 ASN1err(ASN1_F_ASN1_SIGN
,ASN1_R_UNKNOWN_OBJECT_TYPE
);
253 if (a
->algorithm
->length
== 0)
255 ASN1err(ASN1_F_ASN1_SIGN
,ASN1_R_THE_ASN1_OBJECT_IDENTIFIER_IS_NOT_KNOWN_FOR_THIS_MD
);
259 inl
=ASN1_item_i2d(asn
,&buf_in
, it
);
260 outll
=outl
=EVP_PKEY_size(pkey
);
261 buf_out
=(unsigned char *)OPENSSL_malloc((unsigned int)outl
);
262 if ((buf_in
== NULL
) || (buf_out
== NULL
))
265 ASN1err(ASN1_F_ASN1_SIGN
,ERR_R_MALLOC_FAILURE
);
269 EVP_SignInit_ex(&ctx
,type
, NULL
);
270 EVP_SignUpdate(&ctx
,(unsigned char *)buf_in
,inl
);
271 if (!EVP_SignFinal(&ctx
,(unsigned char *)buf_out
,
272 (unsigned int *)&outl
,pkey
))
275 ASN1err(ASN1_F_ASN1_SIGN
,ERR_R_EVP_LIB
);
278 if (signature
->data
!= NULL
) OPENSSL_free(signature
->data
);
279 signature
->data
=buf_out
;
281 signature
->length
=outl
;
282 /* In the interests of compatibility, I'll make sure that
283 * the bit string has a 'not-used bits' value of 0
285 signature
->flags
&= ~(ASN1_STRING_FLAG_BITS_LEFT
|0x07);
286 signature
->flags
|=ASN1_STRING_FLAG_BITS_LEFT
;
288 EVP_MD_CTX_cleanup(&ctx
);
290 { OPENSSL_cleanse((char *)buf_in
,(unsigned int)inl
); OPENSSL_free(buf_in
); }
292 { OPENSSL_cleanse((char *)buf_out
,outll
); OPENSSL_free(buf_out
); }