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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 : 0 : 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 : 0 : unsigned char *p,*buf_in=NULL,*buf_out=NULL;
136 : 0 : int i,inl=0,outl=0,outll=0;
137 : : X509_ALGOR *a;
138 : :
139 : 0 : EVP_MD_CTX_init(&ctx);
140 [ # # ]: 0 : for (i=0; i<2; i++)
141 : : {
142 [ # # ]: 0 : if (i == 0)
143 : : a=algor1;
144 : : else
145 : 0 : a=algor2;
146 [ # # ]: 0 : if (a == NULL) continue;
147 [ # # ]: 0 : if (type->pkey_type == NID_dsaWithSHA1)
148 : : {
149 : : /* special case: RFC 2459 tells us to omit 'parameters'
150 : : * with id-dsa-with-sha1 */
151 : 0 : ASN1_TYPE_free(a->parameter);
152 : 0 : a->parameter = NULL;
153 : : }
154 [ # # ][ # # ]: 0 : else if ((a->parameter == NULL) ||
155 : 0 : (a->parameter->type != V_ASN1_NULL))
156 : : {
157 : 0 : ASN1_TYPE_free(a->parameter);
158 [ # # ]: 0 : if ((a->parameter=ASN1_TYPE_new()) == NULL) goto err;
159 : 0 : a->parameter->type=V_ASN1_NULL;
160 : : }
161 : 0 : ASN1_OBJECT_free(a->algorithm);
162 : 0 : a->algorithm=OBJ_nid2obj(type->pkey_type);
163 [ # # ]: 0 : if (a->algorithm == NULL)
164 : : {
165 : 0 : ASN1err(ASN1_F_ASN1_SIGN,ASN1_R_UNKNOWN_OBJECT_TYPE);
166 : 0 : goto err;
167 : : }
168 [ # # ]: 0 : if (a->algorithm->length == 0)
169 : : {
170 : 0 : ASN1err(ASN1_F_ASN1_SIGN,ASN1_R_THE_ASN1_OBJECT_IDENTIFIER_IS_NOT_KNOWN_FOR_THIS_MD);
171 : 0 : goto err;
172 : : }
173 : : }
174 : 0 : inl=i2d(data,NULL);
175 : 0 : buf_in=(unsigned char *)OPENSSL_malloc((unsigned int)inl);
176 : 0 : outll=outl=EVP_PKEY_size(pkey);
177 : 0 : buf_out=(unsigned char *)OPENSSL_malloc((unsigned int)outl);
178 [ # # ]: 0 : if ((buf_in == NULL) || (buf_out == NULL))
179 : : {
180 : 0 : outl=0;
181 : 0 : ASN1err(ASN1_F_ASN1_SIGN,ERR_R_MALLOC_FAILURE);
182 : 0 : goto err;
183 : : }
184 : 0 : p=buf_in;
185 : :
186 : 0 : i2d(data,&p);
187 [ # # ]: 0 : if (!EVP_SignInit_ex(&ctx,type, NULL)
188 [ # # ]: 0 : || !EVP_SignUpdate(&ctx,(unsigned char *)buf_in,inl)
189 [ # # ]: 0 : || !EVP_SignFinal(&ctx,(unsigned char *)buf_out,
190 : : (unsigned int *)&outl,pkey))
191 : : {
192 : 0 : outl=0;
193 : 0 : ASN1err(ASN1_F_ASN1_SIGN,ERR_R_EVP_LIB);
194 : 0 : goto err;
195 : : }
196 [ # # ]: 0 : if (signature->data != NULL) OPENSSL_free(signature->data);
197 : 0 : signature->data=buf_out;
198 : 0 : buf_out=NULL;
199 : 0 : 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 : 0 : signature->flags&= ~(ASN1_STRING_FLAG_BITS_LEFT|0x07);
204 : 0 : signature->flags|=ASN1_STRING_FLAG_BITS_LEFT;
205 : : err:
206 : 0 : EVP_MD_CTX_cleanup(&ctx);
207 [ # # ]: 0 : if (buf_in != NULL)
208 : 0 : { OPENSSL_cleanse((char *)buf_in,(unsigned int)inl); OPENSSL_free(buf_in); }
209 [ # # ]: 0 : if (buf_out != NULL)
210 : 0 : { OPENSSL_cleanse((char *)buf_out,outll); OPENSSL_free(buf_out); }
211 : 0 : return(outl);
212 : : }
213 : :
214 : : #endif
215 : :
216 : 2 : 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 : 2 : EVP_MD_CTX_init(&ctx);
222 [ - + ]: 2 : if (!EVP_DigestSignInit(&ctx, NULL, type, NULL, pkey))
223 : : {
224 : 0 : EVP_MD_CTX_cleanup(&ctx);
225 : 0 : return 0;
226 : : }
227 : 2 : return ASN1_item_sign_ctx(it, algor1, algor2, signature, asn, &ctx);
228 : : }
229 : :
230 : :
231 : 19 : 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 : 19 : unsigned char *buf_in=NULL,*buf_out=NULL;
238 : 19 : size_t inl=0,outl=0,outll=0;
239 : : int signid, paramtype;
240 : : int rv;
241 : :
242 : 19 : type = EVP_MD_CTX_md(ctx);
243 : 19 : pkey = EVP_PKEY_CTX_get0_pkey(ctx->pctx);
244 : :
245 [ - + ]: 19 : if (!type || !pkey)
246 : : {
247 : 0 : ASN1err(ASN1_F_ASN1_ITEM_SIGN_CTX, ASN1_R_CONTEXT_NOT_INITIALISED);
248 : 0 : return 0;
249 : : }
250 : :
251 [ + - ]: 19 : if (pkey->ameth->item_sign)
252 : : {
253 : 19 : rv = pkey->ameth->item_sign(ctx, it, asn, algor1, algor2,
254 : : signature);
255 [ - + ]: 19 : if (rv == 1)
256 : 0 : 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 [ - + ]: 19 : if (rv <= 0)
264 : 0 : ASN1err(ASN1_F_ASN1_ITEM_SIGN_CTX, ERR_R_EVP_LIB);
265 [ + - ]: 19 : if (rv <= 1)
266 : : goto err;
267 : : }
268 : : else
269 : : rv = 2;
270 : :
271 [ + - ]: 19 : if (rv == 2)
272 : : {
273 [ + + ]: 19 : if (type->flags & EVP_MD_FLAG_PKEY_METHOD_SIGNATURE)
274 : : {
275 [ + - - + ]: 36 : if (!pkey->ameth ||
276 : 18 : !OBJ_find_sigid_by_algs(&signid,
277 : : EVP_MD_nid(type),
278 : : pkey->ameth->pkey_id))
279 : : {
280 : 0 : ASN1err(ASN1_F_ASN1_ITEM_SIGN_CTX,
281 : : ASN1_R_DIGEST_AND_KEY_TYPE_NOT_SUPPORTED);
282 : 0 : return 0;
283 : : }
284 : : }
285 : : else
286 : 1 : signid = type->pkey_type;
287 : :
288 [ - + ]: 19 : if (pkey->ameth->pkey_flags & ASN1_PKEY_SIGPARAM_NULL)
289 : : paramtype = V_ASN1_NULL;
290 : : else
291 : 0 : paramtype = V_ASN1_UNDEF;
292 : :
293 [ + - ]: 19 : if (algor1)
294 : 19 : X509_ALGOR_set0(algor1, OBJ_nid2obj(signid), paramtype, NULL);
295 [ + + ]: 19 : if (algor2)
296 : 9 : X509_ALGOR_set0(algor2, OBJ_nid2obj(signid), paramtype, NULL);
297 : :
298 : : }
299 : :
300 : 19 : inl=ASN1_item_i2d(asn,&buf_in, it);
301 : 19 : outll=outl=EVP_PKEY_size(pkey);
302 : 19 : buf_out=OPENSSL_malloc((unsigned int)outl);
303 [ + - ][ - + ]: 19 : if ((buf_in == NULL) || (buf_out == NULL))
304 : : {
305 : 0 : outl=0;
306 : 0 : ASN1err(ASN1_F_ASN1_ITEM_SIGN_CTX,ERR_R_MALLOC_FAILURE);
307 : 0 : goto err;
308 : : }
309 : :
310 [ + - ]: 19 : if (!EVP_DigestSignUpdate(ctx, buf_in, inl)
311 [ - + ]: 19 : || !EVP_DigestSignFinal(ctx, buf_out, &outl))
312 : : {
313 : 0 : outl=0;
314 : 0 : ASN1err(ASN1_F_ASN1_ITEM_SIGN_CTX,ERR_R_EVP_LIB);
315 : 0 : goto err;
316 : : }
317 [ - + ]: 19 : if (signature->data != NULL) OPENSSL_free(signature->data);
318 : 19 : signature->data=buf_out;
319 : 19 : buf_out=NULL;
320 : 19 : 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 : 19 : signature->flags&= ~(ASN1_STRING_FLAG_BITS_LEFT|0x07);
325 : 19 : signature->flags|=ASN1_STRING_FLAG_BITS_LEFT;
326 : : err:
327 : 19 : EVP_MD_CTX_cleanup(ctx);
328 [ + - ]: 19 : if (buf_in != NULL)
329 : 19 : { OPENSSL_cleanse((char *)buf_in,(unsigned int)inl); OPENSSL_free(buf_in); }
330 [ - + ]: 19 : if (buf_out != NULL)
331 : 0 : { OPENSSL_cleanse((char *)buf_out,outll); OPENSSL_free(buf_out); }
332 : 19 : return(outl);
333 : : }
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