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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 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_IDENTIFI
ER_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_fre
e(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_INITIALISE
D); | |
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_fre
e(buf_in); } | |
330 if (buf_out != NULL) | |
331 { OPENSSL_cleanse((char *)buf_out,outll); OPENSSL_free(buf_out);
} | |
332 return(outl); | |
333 } | |
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