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 #include "asn1_locl.h"
127
128 #ifndef NO_ASN1_OLD
129
130 int ASN1_sign(i2d_of_void *i2d, X509_ALGOR *algor1, X509_ALGOR *algor2,
131 ASN1_BIT_STRING *signature, char *data, EVP_PKEY *pkey,
132 const EVP_MD *type)
133 {
134 EVP_MD_CTX ctx;
135 unsigned char *p,*buf_in=NULL,*buf_out=NULL;
136 int i,inl=0,outl=0,outll=0;
137 X509_ALGOR *a;
138
139 EVP_MD_CTX_init(&ctx);
140 for (i=0; i<2; i++)
141 {
142 if (i == 0)
143 a=algor1;
144 else
145 a=algor2;
146 if (a == NULL) continue;
147 if (type->pkey_type == NID_dsaWithSHA1)
148 {
149 /* special case: RFC 2459 tells us to omit 'parameters'
150 * with id-dsa-with-sha1 */
151 ASN1_TYPE_free(a->parameter);
152 a->parameter = NULL;
153 }
154 else if ((a->parameter == NULL) ||
155 (a->parameter->type != V_ASN1_NULL))
156 {
157 ASN1_TYPE_free(a->parameter);
158 if ((a->parameter=ASN1_TYPE_new()) == NULL) goto err;
159 a->parameter->type=V_ASN1_NULL;
160 }
161 ASN1_OBJECT_free(a->algorithm);
162 a->algorithm=OBJ_nid2obj(type->pkey_type);
163 if (a->algorithm == NULL)
164 {
165 ASN1err(ASN1_F_ASN1_SIGN,ASN1_R_UNKNOWN_OBJECT_TYPE);
166 goto err;
167 }
168 if (a->algorithm->length == 0)
169 {
170 ASN1err(ASN1_F_ASN1_SIGN,ASN1_R_THE_ASN1_OBJECT_IDENTIFIER_IS_NOT_KNOWN_FOR_THIS_MD);
171 goto err;
172 }
173 }
174 inl=i2d(data,NULL);
175 buf_in=(unsigned char *)OPENSSL_malloc((unsigned int)inl);
176 outll=outl=EVP_PKEY_size(pkey);
177 buf_out=(unsigned char *)OPENSSL_malloc((unsigned int)outl);
178 if ((buf_in == NULL) || (buf_out == NULL))
179 {
180 outl=0;
181 ASN1err(ASN1_F_ASN1_SIGN,ERR_R_MALLOC_FAILURE);
182 goto err;
183 }
184 p=buf_in;
185
186 i2d(data,&p);
187 if (!EVP_SignInit_ex(&ctx,type, NULL)
188 || !EVP_SignUpdate(&ctx,(unsigned char *)buf_in,inl)
189 || !EVP_SignFinal(&ctx,(unsigned char *)buf_out,
190 (unsigned int *)&outl,pkey))
191 {
192 outl=0;
193 ASN1err(ASN1_F_ASN1_SIGN,ERR_R_EVP_LIB);
194 goto err;
195 }
196 if (signature->data != NULL) OPENSSL_free(signature->data);
197 signature->data=buf_out;
198 buf_out=NULL;
199 signature->length=outl;
200 /* In the interests of compatibility, I'll make sure that
201 * the bit string has a 'not-used bits' value of 0
202 */
203 signature->flags&= ~(ASN1_STRING_FLAG_BITS_LEFT|0x07);
204 signature->flags|=ASN1_STRING_FLAG_BITS_LEFT;
205 err:
206 EVP_MD_CTX_cleanup(&ctx);
207 if (buf_in != NULL)
208 { OPENSSL_cleanse((char *)buf_in,(unsigned int)inl); OPENSSL_free(buf_in); }
209 if (buf_out != NULL)
210 { OPENSSL_cleanse((char *)buf_out,outll); OPENSSL_free(buf_out); }
211 return(outl);
212 }
213
214 #endif
215
216 int ASN1_item_sign(const ASN1_ITEM *it, X509_ALGOR *algor1, X509_ALGOR *algor2,
217 ASN1_BIT_STRING *signature, void *asn, EVP_PKEY *pkey,
218 const EVP_MD *type)
219 {
220 EVP_MD_CTX ctx;
221 EVP_MD_CTX_init(&ctx);
222 if (!EVP_DigestSignInit(&ctx, NULL, type, NULL, pkey))
223 {
224 EVP_MD_CTX_cleanup(&ctx);
225 return 0;
226 }
227 return ASN1_item_sign_ctx(it, algor1, algor2, signature, asn, &ctx);
228 }
229
230
231 int ASN1_item_sign_ctx(const ASN1_ITEM *it,
232 X509_ALGOR *algor1, X509_ALGOR *algor2,
233 ASN1_BIT_STRING *signature, void *asn, EVP_MD_CTX *ctx)
234 {
235 const EVP_MD *type;
236 EVP_PKEY *pkey;
237 unsigned char *buf_in=NULL,*buf_out=NULL;
238 size_t inl=0,outl=0,outll=0;
239 int signid, paramtype;
240 int rv;
241
242 type = EVP_MD_CTX_md(ctx);
243 pkey = EVP_PKEY_CTX_get0_pkey(ctx->pctx);
244
245 if (!type || !pkey)
246 {
247 ASN1err(ASN1_F_ASN1_ITEM_SIGN_CTX, ASN1_R_CONTEXT_NOT_INITIALISED);
248 return 0;
249 }
250
251 if (pkey->ameth->item_sign)
252 {
253 rv = pkey->ameth->item_sign(ctx, it, asn, algor1, algor2,
254 signature);
255 if (rv == 1)
256 outl = signature->length;
257 /* Return value meanings:
258 * <=0: error.
259 * 1: method does everything.
260 * 2: carry on as normal.
261 * 3: ASN1 method sets algorithm identifiers: just sign.
262 */
263 if (rv <= 0)
264 ASN1err(ASN1_F_ASN1_ITEM_SIGN_CTX, ERR_R_EVP_LIB);
265 if (rv <= 1)
266 goto err;
267 }
268 else
269 rv = 2;
270
271 if (rv == 2)
272 {
273 if (type->flags & EVP_MD_FLAG_PKEY_METHOD_SIGNATURE)
274 {
275 if (!pkey->ameth ||
276 !OBJ_find_sigid_by_algs(&signid,
277 EVP_MD_nid(type),
278 pkey->ameth->pkey_id))
279 {
280 ASN1err(ASN1_F_ASN1_ITEM_SIGN_CTX,
281 ASN1_R_DIGEST_AND_KEY_TYPE_NOT_SUPPORTED);
282 return 0;
283 }
284 }
285 else
286 signid = type->pkey_type;
287
288 if (pkey->ameth->pkey_flags & ASN1_PKEY_SIGPARAM_NULL)
289 paramtype = V_ASN1_NULL;
290 else
291 paramtype = V_ASN1_UNDEF;
292
293 if (algor1)
294 X509_ALGOR_set0(algor1, OBJ_nid2obj(signid), paramtype, NULL);
295 if (algor2)
296 X509_ALGOR_set0(algor2, OBJ_nid2obj(signid), paramtype, NULL);
297
298 }
299
300 inl=ASN1_item_i2d(asn,&buf_in, it);
301 outll=outl=EVP_PKEY_size(pkey);
302 buf_out=OPENSSL_malloc((unsigned int)outl);
303 if ((buf_in == NULL) || (buf_out == NULL))
304 {
305 outl=0;
306 ASN1err(ASN1_F_ASN1_ITEM_SIGN_CTX,ERR_R_MALLOC_FAILURE);
307 goto err;
308 }
309
310 if (!EVP_DigestSignUpdate(ctx, buf_in, inl)
311 || !EVP_DigestSignFinal(ctx, buf_out, &outl))
312 {
313 outl=0;
314 ASN1err(ASN1_F_ASN1_ITEM_SIGN_CTX,ERR_R_EVP_LIB);
315 goto err;
316 }
317 if (signature->data != NULL) OPENSSL_free(signature->data);
318 signature->data=buf_out;
319 buf_out=NULL;
320 signature->length=outl;
321 /* In the interests of compatibility, I'll make sure that
322 * the bit string has a 'not-used bits' value of 0
323 */
324 signature->flags&= ~(ASN1_STRING_FLAG_BITS_LEFT|0x07);
325 signature->flags|=ASN1_STRING_FLAG_BITS_LEFT;
326 err:
327 EVP_MD_CTX_cleanup(ctx);
328 if (buf_in != NULL)
329 { OPENSSL_cleanse((char *)buf_in,(unsigned int)inl); OPENSSL_free(buf_in); }
330 if (buf_out != NULL)
331 { OPENSSL_cleanse((char *)buf_out,outll); OPENSSL_free(buf_out); }
332 return(outl);
333 }