1 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
4 * This package is an SSL implementation written
5 * by Eric Young (eay@cryptsoft.com).
6 * The implementation was written so as to conform with Netscapes SSL.
8 * This library is free for commercial and non-commercial use as long as
9 * the following conditions are aheared to. The following conditions
10 * apply to all code found in this distribution, be it the RC4, RSA,
11 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
12 * included with this distribution is covered by the same copyright terms
13 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15 * Copyright remains Eric Young's, and as such any Copyright notices in
16 * the code are not to be removed.
17 * If this package is used in a product, Eric Young should be given attribution
18 * as the author of the parts of the library used.
19 * This can be in the form of a textual message at program startup or
20 * in documentation (online or textual) provided with the package.
22 * Redistribution and use in source and binary forms, with or without
23 * modification, are permitted provided that the following conditions
25 * 1. Redistributions of source code must retain the copyright
26 * notice, this list of conditions and the following disclaimer.
27 * 2. Redistributions in binary form must reproduce the above copyright
28 * notice, this list of conditions and the following disclaimer in the
29 * documentation and/or other materials provided with the distribution.
30 * 3. All advertising materials mentioning features or use of this software
31 * must display the following acknowledgement:
32 * "This product includes cryptographic software written by
33 * Eric Young (eay@cryptsoft.com)"
34 * The word 'cryptographic' can be left out if the rouines from the library
35 * being used are not cryptographic related :-).
36 * 4. If you include any Windows specific code (or a derivative thereof) from
37 * the apps directory (application code) you must include an acknowledgement:
38 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
41 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
43 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
44 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
45 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
46 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
48 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
49 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
52 * The licence and distribution terms for any publically available version or
53 * derivative of this code cannot be changed. i.e. this code cannot simply be
54 * copied and put under another distribution licence
55 * [including the GNU Public Licence.]
57 /* ====================================================================
58 * Copyright (c) 1998-2003 The OpenSSL Project. All rights reserved.
60 * Redistribution and use in source and binary forms, with or without
61 * modification, are permitted provided that the following conditions
64 * 1. Redistributions of source code must retain the above copyright
65 * notice, this list of conditions and the following disclaimer.
67 * 2. Redistributions in binary form must reproduce the above copyright
68 * notice, this list of conditions and the following disclaimer in
69 * the documentation and/or other materials provided with the
72 * 3. All advertising materials mentioning features or use of this
73 * software must display the following acknowledgment:
74 * "This product includes software developed by the OpenSSL Project
75 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
77 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
78 * endorse or promote products derived from this software without
79 * prior written permission. For written permission, please contact
80 * openssl-core@openssl.org.
82 * 5. Products derived from this software may not be called "OpenSSL"
83 * nor may "OpenSSL" appear in their names without prior written
84 * permission of the OpenSSL Project.
86 * 6. Redistributions of any form whatsoever must retain the following
88 * "This product includes software developed by the OpenSSL Project
89 * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
91 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
92 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
93 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
94 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
95 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
96 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
97 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
98 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
99 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
100 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
101 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
102 * OF THE POSSIBILITY OF SUCH DAMAGE.
103 * ====================================================================
105 * This product includes cryptographic software written by Eric Young
106 * (eay@cryptsoft.com). This product includes software written by Tim
107 * Hudson (tjh@cryptsoft.com).
114 #include "internal/cryptlib.h"
116 #ifndef NO_SYS_TYPES_H
117 # include <sys/types.h>
120 #include <openssl/bn.h>
121 #include <openssl/evp.h>
122 #include <openssl/x509.h>
123 #include <openssl/objects.h>
124 #include <openssl/buffer.h>
125 #include "internal/asn1_int.h"
126 #include "internal/evp_int.h"
130 int ASN1_sign(i2d_of_void *i2d, X509_ALGOR *algor1, X509_ALGOR *algor2,
131 ASN1_BIT_STRING *signature, char *data, EVP_PKEY *pkey,
134 EVP_MD_CTX *ctx = EVP_MD_CTX_new();
135 unsigned char *p, *buf_in = NULL, *buf_out = NULL;
136 int i, inl = 0, outl = 0, outll = 0;
140 ASN1err(ASN1_F_ASN1_SIGN, ERR_R_MALLOC_FAILURE);
143 for (i = 0; i < 2; i++) {
150 if (type->pkey_type == NID_dsaWithSHA1) {
152 * special case: RFC 2459 tells us to omit 'parameters' with
155 ASN1_TYPE_free(a->parameter);
157 } else if ((a->parameter == NULL) ||
158 (a->parameter->type != V_ASN1_NULL)) {
159 ASN1_TYPE_free(a->parameter);
160 if ((a->parameter = ASN1_TYPE_new()) == NULL)
162 a->parameter->type = V_ASN1_NULL;
164 ASN1_OBJECT_free(a->algorithm);
165 a->algorithm = OBJ_nid2obj(type->pkey_type);
166 if (a->algorithm == NULL) {
167 ASN1err(ASN1_F_ASN1_SIGN, ASN1_R_UNKNOWN_OBJECT_TYPE);
170 if (a->algorithm->length == 0) {
171 ASN1err(ASN1_F_ASN1_SIGN,
172 ASN1_R_THE_ASN1_OBJECT_IDENTIFIER_IS_NOT_KNOWN_FOR_THIS_MD);
176 inl = i2d(data, NULL);
177 buf_in = OPENSSL_malloc((unsigned int)inl);
178 outll = outl = EVP_PKEY_size(pkey);
179 buf_out = OPENSSL_malloc((unsigned int)outl);
180 if ((buf_in == NULL) || (buf_out == NULL)) {
182 ASN1err(ASN1_F_ASN1_SIGN, ERR_R_MALLOC_FAILURE);
188 if (!EVP_SignInit_ex(ctx, type, NULL)
189 || !EVP_SignUpdate(ctx, (unsigned char *)buf_in, inl)
190 || !EVP_SignFinal(ctx, (unsigned char *)buf_out,
191 (unsigned int *)&outl, pkey)) {
193 ASN1err(ASN1_F_ASN1_SIGN, ERR_R_EVP_LIB);
196 OPENSSL_free(signature->data);
197 signature->data = buf_out;
199 signature->length = outl;
201 * In the interests of compatibility, I'll make sure that the bit string
202 * has a 'not-used bits' value of 0
204 signature->flags &= ~(ASN1_STRING_FLAG_BITS_LEFT | 0x07);
205 signature->flags |= ASN1_STRING_FLAG_BITS_LEFT;
207 EVP_MD_CTX_free(ctx);
208 OPENSSL_clear_free((char *)buf_in, (unsigned int)inl);
209 OPENSSL_clear_free((char *)buf_out, outll);
215 int ASN1_item_sign(const ASN1_ITEM *it, X509_ALGOR *algor1,
216 X509_ALGOR *algor2, ASN1_BIT_STRING *signature, void *asn,
217 EVP_PKEY *pkey, const EVP_MD *type)
219 EVP_MD_CTX *ctx = EVP_MD_CTX_new();
222 ASN1err(ASN1_F_ASN1_ITEM_SIGN, ERR_R_MALLOC_FAILURE);
225 if (!EVP_DigestSignInit(ctx, NULL, type, NULL, pkey)) {
226 EVP_MD_CTX_free(ctx);
229 return ASN1_item_sign_ctx(it, algor1, algor2, signature, asn, ctx);
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)
238 unsigned char *buf_in = NULL, *buf_out = NULL;
239 size_t inl = 0, outl = 0, outll = 0;
240 int signid, paramtype;
243 type = EVP_MD_CTX_md(ctx);
244 pkey = EVP_PKEY_CTX_get0_pkey(EVP_MD_CTX_pkey_ctx(ctx));
246 if (!type || !pkey) {
247 ASN1err(ASN1_F_ASN1_ITEM_SIGN_CTX, ASN1_R_CONTEXT_NOT_INITIALISED);
251 if (pkey->ameth->item_sign) {
252 rv = pkey->ameth->item_sign(ctx, it, asn, algor1, algor2, signature);
254 outl = signature->length;
256 * Return value meanings:
258 * 1: method does everything.
259 * 2: carry on as normal.
260 * 3: ASN1 method sets algorithm identifiers: just sign.
263 ASN1err(ASN1_F_ASN1_ITEM_SIGN_CTX, ERR_R_EVP_LIB);
271 !OBJ_find_sigid_by_algs(&signid,
273 pkey->ameth->pkey_id)) {
274 ASN1err(ASN1_F_ASN1_ITEM_SIGN_CTX,
275 ASN1_R_DIGEST_AND_KEY_TYPE_NOT_SUPPORTED);
279 if (pkey->ameth->pkey_flags & ASN1_PKEY_SIGPARAM_NULL)
280 paramtype = V_ASN1_NULL;
282 paramtype = V_ASN1_UNDEF;
285 X509_ALGOR_set0(algor1, OBJ_nid2obj(signid), paramtype, NULL);
287 X509_ALGOR_set0(algor2, OBJ_nid2obj(signid), paramtype, NULL);
291 inl = ASN1_item_i2d(asn, &buf_in, it);
292 outll = outl = EVP_PKEY_size(pkey);
293 buf_out = OPENSSL_malloc((unsigned int)outl);
294 if ((buf_in == NULL) || (buf_out == NULL)) {
296 ASN1err(ASN1_F_ASN1_ITEM_SIGN_CTX, ERR_R_MALLOC_FAILURE);
300 if (!EVP_DigestSignUpdate(ctx, buf_in, inl)
301 || !EVP_DigestSignFinal(ctx, buf_out, &outl)) {
303 ASN1err(ASN1_F_ASN1_ITEM_SIGN_CTX, ERR_R_EVP_LIB);
306 OPENSSL_free(signature->data);
307 signature->data = buf_out;
309 signature->length = outl;
311 * In the interests of compatibility, I'll make sure that the bit string
312 * has a 'not-used bits' value of 0
314 signature->flags &= ~(ASN1_STRING_FLAG_BITS_LEFT | 0x07);
315 signature->flags |= ASN1_STRING_FLAG_BITS_LEFT;
317 EVP_MD_CTX_free(ctx);
318 OPENSSL_clear_free((char *)buf_in, (unsigned int)inl);
319 OPENSSL_clear_free((char *)buf_out, outll);