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
ASN1_sign(i2d_of_void * i2d,X509_ALGOR * algor1,X509_ALGOR * algor2,ASN1_BIT_STRING * signature,char * data,EVP_PKEY * pkey,const EVP_MD * type)129 int 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;
204 err:
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
ASN1_item_sign(const ASN1_ITEM * it,X509_ALGOR * algor1,X509_ALGOR * algor2,ASN1_BIT_STRING * signature,void * asn,EVP_PKEY * pkey,const EVP_MD * type)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,
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 EVP_SignInit_ex(&ctx,type, NULL);
271 EVP_SignUpdate(&ctx,(unsigned char *)buf_in,inl);
272 if (!EVP_SignFinal(&ctx,(unsigned char *)buf_out,
273 (unsigned int *)&outl,pkey))
274 {
275 outl=0;
276 ASN1err(ASN1_F_ASN1_ITEM_SIGN,ERR_R_EVP_LIB);
277 goto err;
278 }
279 if (signature->data != NULL) OPENSSL_free(signature->data);
280 signature->data=buf_out;
281 buf_out=NULL;
282 signature->length=outl;
283 /* In the interests of compatibility, I'll make sure that
284 * the bit string has a 'not-used bits' value of 0
285 */
286 signature->flags&= ~(ASN1_STRING_FLAG_BITS_LEFT|0x07);
287 signature->flags|=ASN1_STRING_FLAG_BITS_LEFT;
288 err:
289 EVP_MD_CTX_cleanup(&ctx);
290 if (buf_in != NULL)
291 { OPENSSL_cleanse((char *)buf_in,(unsigned int)inl); OPENSSL_free(buf_in); }
292 if (buf_out != NULL)
293 { OPENSSL_cleanse((char *)buf_out,outll); OPENSSL_free(buf_out); }
294 return(outl);
295 }
296