]>
Commit | Line | Data |
---|---|---|
031e5cce SM |
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). | |
3e575651 SL |
109 | * |
110 | */ | |
111 | ||
112 | #include <stdio.h> | |
113 | #include <time.h> | |
114 | ||
031e5cce | 115 | #include "cryptlib.h" |
3e575651 SL |
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> | |
031e5cce | 126 | #include "asn1_locl.h" |
3e575651 SL |
127 | |
128 | #ifndef NO_ASN1_OLD | |
129 | ||
130 | int ASN1_sign(i2d_of_void *i2d, X509_ALGOR *algor1, X509_ALGOR *algor2, | |
d3819813 MTL |
131 | ASN1_BIT_STRING *signature, char *data, EVP_PKEY *pkey, |
132 | const EVP_MD *type) | |
133 | { | |
031e5cce | 134 | EVP_MD_CTX ctx; |
d3819813 MTL |
135 | unsigned char *p, *buf_in = NULL, *buf_out = NULL; |
136 | int i, inl = 0, outl = 0, outll = 0; | |
137 | X509_ALGOR *a; | |
3e575651 | 138 | |
031e5cce | 139 | EVP_MD_CTX_init(&ctx); |
d3819813 MTL |
140 | for (i = 0; i < 2; i++) { |
141 | if (i == 0) | |
142 | a = algor1; | |
143 | else | |
144 | a = algor2; | |
145 | if (a == NULL) | |
146 | continue; | |
147 | if (type->pkey_type == NID_dsaWithSHA1) { | |
148 | /* | |
149 | * special case: RFC 2459 tells us to omit 'parameters' with | |
150 | * id-dsa-with-sha1 | |
151 | */ | |
152 | ASN1_TYPE_free(a->parameter); | |
153 | a->parameter = NULL; | |
154 | } else if ((a->parameter == NULL) || | |
155 | (a->parameter->type != V_ASN1_NULL)) { | |
156 | ASN1_TYPE_free(a->parameter); | |
157 | if ((a->parameter = ASN1_TYPE_new()) == NULL) | |
158 | 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 | ASN1err(ASN1_F_ASN1_SIGN, ASN1_R_UNKNOWN_OBJECT_TYPE); | |
165 | goto err; | |
166 | } | |
167 | if (a->algorithm->length == 0) { | |
168 | ASN1err(ASN1_F_ASN1_SIGN, | |
169 | ASN1_R_THE_ASN1_OBJECT_IDENTIFIER_IS_NOT_KNOWN_FOR_THIS_MD); | |
170 | goto err; | |
171 | } | |
172 | } | |
173 | inl = i2d(data, NULL); | |
031e5cce | 174 | buf_in = (unsigned char *)OPENSSL_malloc((unsigned int)inl); |
d3819813 | 175 | outll = outl = EVP_PKEY_size(pkey); |
031e5cce | 176 | buf_out = (unsigned char *)OPENSSL_malloc((unsigned int)outl); |
d3819813 MTL |
177 | if ((buf_in == NULL) || (buf_out == NULL)) { |
178 | outl = 0; | |
179 | ASN1err(ASN1_F_ASN1_SIGN, ERR_R_MALLOC_FAILURE); | |
180 | goto err; | |
181 | } | |
182 | p = buf_in; | |
3e575651 | 183 | |
d3819813 | 184 | i2d(data, &p); |
031e5cce SM |
185 | if (!EVP_SignInit_ex(&ctx, type, NULL) |
186 | || !EVP_SignUpdate(&ctx, (unsigned char *)buf_in, inl) | |
187 | || !EVP_SignFinal(&ctx, (unsigned char *)buf_out, | |
d3819813 MTL |
188 | (unsigned int *)&outl, pkey)) { |
189 | outl = 0; | |
190 | ASN1err(ASN1_F_ASN1_SIGN, ERR_R_EVP_LIB); | |
191 | goto err; | |
192 | } | |
031e5cce SM |
193 | if (signature->data != NULL) |
194 | OPENSSL_free(signature->data); | |
d3819813 MTL |
195 | signature->data = buf_out; |
196 | buf_out = NULL; | |
197 | signature->length = outl; | |
198 | /* | |
199 | * In the interests of compatibility, I'll make sure that the bit string | |
200 | * 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: | |
031e5cce SM |
205 | EVP_MD_CTX_cleanup(&ctx); |
206 | if (buf_in != NULL) { | |
207 | OPENSSL_cleanse((char *)buf_in, (unsigned int)inl); | |
208 | OPENSSL_free(buf_in); | |
209 | } | |
210 | if (buf_out != NULL) { | |
211 | OPENSSL_cleanse((char *)buf_out, outll); | |
212 | OPENSSL_free(buf_out); | |
213 | } | |
d3819813 MTL |
214 | return (outl); |
215 | } | |
3e575651 SL |
216 | |
217 | #endif | |
218 | ||
d3819813 MTL |
219 | int ASN1_item_sign(const ASN1_ITEM *it, X509_ALGOR *algor1, |
220 | X509_ALGOR *algor2, ASN1_BIT_STRING *signature, void *asn, | |
221 | EVP_PKEY *pkey, const EVP_MD *type) | |
222 | { | |
031e5cce SM |
223 | EVP_MD_CTX ctx; |
224 | EVP_MD_CTX_init(&ctx); | |
225 | if (!EVP_DigestSignInit(&ctx, NULL, type, NULL, pkey)) { | |
226 | EVP_MD_CTX_cleanup(&ctx); | |
d3819813 MTL |
227 | return 0; |
228 | } | |
031e5cce | 229 | return ASN1_item_sign_ctx(it, algor1, algor2, signature, asn, &ctx); |
d3819813 MTL |
230 | } |
231 | ||
232 | int ASN1_item_sign_ctx(const ASN1_ITEM *it, | |
233 | X509_ALGOR *algor1, X509_ALGOR *algor2, | |
234 | ASN1_BIT_STRING *signature, void *asn, EVP_MD_CTX *ctx) | |
235 | { | |
236 | const EVP_MD *type; | |
237 | EVP_PKEY *pkey; | |
238 | unsigned char *buf_in = NULL, *buf_out = NULL; | |
239 | size_t inl = 0, outl = 0, outll = 0; | |
240 | int signid, paramtype; | |
241 | int rv; | |
242 | ||
243 | type = EVP_MD_CTX_md(ctx); | |
031e5cce | 244 | pkey = EVP_PKEY_CTX_get0_pkey(ctx->pctx); |
d3819813 | 245 | |
031e5cce | 246 | if (!type || !pkey) { |
d3819813 | 247 | ASN1err(ASN1_F_ASN1_ITEM_SIGN_CTX, ASN1_R_CONTEXT_NOT_INITIALISED); |
031e5cce | 248 | return 0; |
d3819813 MTL |
249 | } |
250 | ||
251 | if (pkey->ameth->item_sign) { | |
252 | rv = pkey->ameth->item_sign(ctx, it, asn, algor1, algor2, signature); | |
253 | if (rv == 1) | |
254 | outl = signature->length; | |
255 | /*- | |
256 | * Return value meanings: | |
257 | * <=0: error. | |
258 | * 1: method does everything. | |
259 | * 2: carry on as normal. | |
260 | * 3: ASN1 method sets algorithm identifiers: just sign. | |
261 | */ | |
262 | if (rv <= 0) | |
263 | ASN1err(ASN1_F_ASN1_ITEM_SIGN_CTX, ERR_R_EVP_LIB); | |
264 | if (rv <= 1) | |
265 | goto err; | |
266 | } else | |
267 | rv = 2; | |
268 | ||
269 | if (rv == 2) { | |
031e5cce SM |
270 | if (type->flags & EVP_MD_FLAG_PKEY_METHOD_SIGNATURE) { |
271 | if (!pkey->ameth || | |
272 | !OBJ_find_sigid_by_algs(&signid, | |
273 | EVP_MD_nid(type), | |
274 | pkey->ameth->pkey_id)) { | |
275 | ASN1err(ASN1_F_ASN1_ITEM_SIGN_CTX, | |
276 | ASN1_R_DIGEST_AND_KEY_TYPE_NOT_SUPPORTED); | |
277 | return 0; | |
278 | } | |
279 | } else | |
280 | signid = type->pkey_type; | |
d3819813 MTL |
281 | |
282 | if (pkey->ameth->pkey_flags & ASN1_PKEY_SIGPARAM_NULL) | |
283 | paramtype = V_ASN1_NULL; | |
284 | else | |
285 | paramtype = V_ASN1_UNDEF; | |
286 | ||
287 | if (algor1) | |
288 | X509_ALGOR_set0(algor1, OBJ_nid2obj(signid), paramtype, NULL); | |
289 | if (algor2) | |
290 | X509_ALGOR_set0(algor2, OBJ_nid2obj(signid), paramtype, NULL); | |
291 | ||
292 | } | |
3e575651 | 293 | |
d3819813 MTL |
294 | inl = ASN1_item_i2d(asn, &buf_in, it); |
295 | outll = outl = EVP_PKEY_size(pkey); | |
296 | buf_out = OPENSSL_malloc((unsigned int)outl); | |
297 | if ((buf_in == NULL) || (buf_out == NULL)) { | |
298 | outl = 0; | |
299 | ASN1err(ASN1_F_ASN1_ITEM_SIGN_CTX, ERR_R_MALLOC_FAILURE); | |
300 | goto err; | |
301 | } | |
3e575651 | 302 | |
d3819813 MTL |
303 | if (!EVP_DigestSignUpdate(ctx, buf_in, inl) |
304 | || !EVP_DigestSignFinal(ctx, buf_out, &outl)) { | |
305 | outl = 0; | |
306 | ASN1err(ASN1_F_ASN1_ITEM_SIGN_CTX, ERR_R_EVP_LIB); | |
307 | goto err; | |
308 | } | |
031e5cce SM |
309 | if (signature->data != NULL) |
310 | OPENSSL_free(signature->data); | |
d3819813 MTL |
311 | signature->data = buf_out; |
312 | buf_out = NULL; | |
313 | signature->length = outl; | |
314 | /* | |
315 | * In the interests of compatibility, I'll make sure that the bit string | |
316 | * has a 'not-used bits' value of 0 | |
317 | */ | |
318 | signature->flags &= ~(ASN1_STRING_FLAG_BITS_LEFT | 0x07); | |
319 | signature->flags |= ASN1_STRING_FLAG_BITS_LEFT; | |
320 | err: | |
031e5cce SM |
321 | EVP_MD_CTX_cleanup(ctx); |
322 | if (buf_in != NULL) { | |
323 | OPENSSL_cleanse((char *)buf_in, (unsigned int)inl); | |
324 | OPENSSL_free(buf_in); | |
325 | } | |
326 | if (buf_out != NULL) { | |
327 | OPENSSL_cleanse((char *)buf_out, outll); | |
328 | OPENSSL_free(buf_out); | |
329 | } | |
d3819813 MTL |
330 | return (outl); |
331 | } |