1 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
2 * All rights reserved.
3 *
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.
7 *
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).
14 *
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.
21 *
22 * Redistribution and use in source and binary forms, with or without
23 * modification, are permitted provided that the following conditions
24 * are met:
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)"
39 *
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
50 * SUCH DAMAGE.
51 *
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.] */
56
57 #include <openssl/asn1.h>
58 #include <openssl/digest.h>
59 #include <openssl/err.h>
60 #include <openssl/evp.h>
61 #include <openssl/mem.h>
62 #include <openssl/obj.h>
63 #include <openssl/x509.h>
64
65 #include "../evp/internal.h"
66
67
68 /* TODO(fork): this code appears to be dead. */
69 #if 0
70 #ifndef NO_ASN1_OLD
71
72 int ASN1_sign(i2d_of_void *i2d, X509_ALGOR *algor1, X509_ALGOR *algor2,
73 ASN1_BIT_STRING *signature, char *data, EVP_PKEY *pkey,
74 const EVP_MD *type)
75 {
76 EVP_MD_CTX ctx;
77 unsigned char *p,*buf_in=NULL,*buf_out=NULL;
78 int i,inl=0,outl=0,outll=0;
79 X509_ALGOR *a;
80
81 EVP_MD_CTX_init(&ctx);
82 for (i=0; i<2; i++)
83 {
84 if (i == 0)
85 a=algor1;
86 else
87 a=algor2;
88 if (a == NULL) continue;
89 if (type->pkey_type == NID_dsaWithSHA1)
90 {
91 /* special case: RFC 2459 tells us to omit 'parameters'
92 * with id-dsa-with-sha1 */
93 ASN1_TYPE_free(a->parameter);
94 a->parameter = NULL;
95 }
96 else if ((a->parameter == NULL) ||
97 (a->parameter->type != V_ASN1_NULL))
98 {
99 ASN1_TYPE_free(a->parameter);
100 if ((a->parameter=ASN1_TYPE_new()) == NULL) goto err;
101 a->parameter->type=V_ASN1_NULL;
102 }
103 ASN1_OBJECT_free(a->algorithm);
104 a->algorithm=OBJ_nid2obj(type->pkey_type);
105 if (a->algorithm == NULL)
106 {
107 OPENSSL_PUT_ERROR(ASN1, XXX, ASN1_R_UNKNOWN_OBJECT_TYPE);
108 goto err;
109 }
110 if (a->algorithm->length == 0)
111 {
112 OPENSSL_PUT_ERROR(ASN1, XXX, ASN1_R_THE_ASN1_OBJECT_IDENTIFIER_IS_NOT_KNOWN_FOR_THIS_MD);
113 goto err;
114 }
115 }
116 inl=i2d(data,NULL);
117 buf_in=(unsigned char *)OPENSSL_malloc((unsigned int)inl);
118 outll=outl=EVP_PKEY_size(pkey);
119 buf_out=(unsigned char *)OPENSSL_malloc((unsigned int)outl);
120 if ((buf_in == NULL) || (buf_out == NULL))
121 {
122 outl=0;
123 OPENSSL_PUT_ERROR(ASN1, XXX, ERR_R_MALLOC_FAILURE);
124 goto err;
125 }
126 p=buf_in;
127
128 i2d(data,&p);
129 if (!EVP_SignInit_ex(&ctx,type, NULL)
130 || !EVP_SignUpdate(&ctx,(unsigned char *)buf_in,inl)
131 || !EVP_SignFinal(&ctx,(unsigned char *)buf_out,
132 (unsigned int *)&outl,pkey))
133 {
134 outl=0;
135 OPENSSL_PUT_ERROR(ASN1, XXX, ERR_R_EVP_LIB);
136 goto err;
137 }
138 if (signature->data != NULL) OPENSSL_free(signature->data);
139 signature->data=buf_out;
140 buf_out=NULL;
141 signature->length=outl;
142 /* In the interests of compatibility, I'll make sure that
143 * the bit string has a 'not-used bits' value of 0
144 */
145 signature->flags&= ~(ASN1_STRING_FLAG_BITS_LEFT|0x07);
146 signature->flags|=ASN1_STRING_FLAG_BITS_LEFT;
147 err:
148 EVP_MD_CTX_cleanup(&ctx);
149 if (buf_in != NULL)
150 { OPENSSL_cleanse((char *)buf_in,(unsigned int)inl); OPENSSL_free(buf_in); }
151 if (buf_out != NULL)
152 { OPENSSL_cleanse((char *)buf_out,outll); OPENSSL_free(buf_out); }
153 return(outl);
154 }
155
156 #endif
157 #endif
158
ASN1_item_sign(const ASN1_ITEM * it,X509_ALGOR * algor1,X509_ALGOR * algor2,ASN1_BIT_STRING * signature,void * asn,EVP_PKEY * pkey,const EVP_MD * type)159 int ASN1_item_sign(const ASN1_ITEM *it, X509_ALGOR *algor1, X509_ALGOR *algor2,
160 ASN1_BIT_STRING *signature, void *asn, EVP_PKEY *pkey,
161 const EVP_MD *type)
162 {
163 EVP_MD_CTX ctx;
164 EVP_MD_CTX_init(&ctx);
165 if (!EVP_DigestSignInit(&ctx, NULL, type, NULL, pkey))
166 {
167 EVP_MD_CTX_cleanup(&ctx);
168 return 0;
169 }
170 return ASN1_item_sign_ctx(it, algor1, algor2, signature, asn, &ctx);
171 }
172
173
ASN1_item_sign_ctx(const ASN1_ITEM * it,X509_ALGOR * algor1,X509_ALGOR * algor2,ASN1_BIT_STRING * signature,void * asn,EVP_MD_CTX * ctx)174 int ASN1_item_sign_ctx(const ASN1_ITEM *it,
175 X509_ALGOR *algor1, X509_ALGOR *algor2,
176 ASN1_BIT_STRING *signature, void *asn, EVP_MD_CTX *ctx)
177 {
178 const EVP_MD *type;
179 EVP_PKEY *pkey;
180 unsigned char *buf_in=NULL,*buf_out=NULL;
181 size_t inl=0,outl=0,outll=0;
182 int signid, paramtype;
183 int rv;
184
185 type = EVP_MD_CTX_md(ctx);
186 pkey = EVP_PKEY_CTX_get0_pkey(ctx->pctx);
187
188 if (!type || !pkey)
189 {
190 OPENSSL_PUT_ERROR(X509, ASN1_item_sign_ctx, X509_R_CONTEXT_NOT_INITIALISED);
191 return 0;
192 }
193
194 if (pkey->ameth->item_sign)
195 {
196 rv = pkey->ameth->item_sign(ctx, it, asn, algor1, algor2,
197 signature);
198 if (rv == 1)
199 outl = signature->length;
200 /* Return value meanings:
201 * <=0: error.
202 * 1: method does everything.
203 * 2: carry on as normal.
204 * 3: ASN1 method sets algorithm identifiers: just sign.
205 */
206 if (rv <= 0)
207 OPENSSL_PUT_ERROR(X509, ASN1_item_sign_ctx, ERR_R_EVP_LIB);
208 if (rv <= 1)
209 goto err;
210 }
211 else
212 rv = 2;
213
214 if (rv == 2)
215 {
216 /* TODO(fork): EVP_MD_FLAG_PKEY_METHOD_SIGNATURE seems to mean
217 * "is SHA". */
218 if (!pkey->ameth ||
219 !OBJ_find_sigid_by_algs(&signid,
220 EVP_MD_type(type),
221 pkey->ameth->pkey_id))
222 {
223 OPENSSL_PUT_ERROR(X509, ASN1_item_sign_ctx, X509_R_DIGEST_AND_KEY_TYPE_NOT_SUPPORTED);
224 return 0;
225 }
226
227 if (pkey->ameth->pkey_flags & ASN1_PKEY_SIGPARAM_NULL)
228 paramtype = V_ASN1_NULL;
229 else
230 paramtype = V_ASN1_UNDEF;
231
232 if (algor1)
233 X509_ALGOR_set0(algor1, OBJ_nid2obj(signid), paramtype, NULL);
234 if (algor2)
235 X509_ALGOR_set0(algor2, OBJ_nid2obj(signid), paramtype, NULL);
236
237 }
238
239 inl=ASN1_item_i2d(asn,&buf_in, it);
240 outll=outl=EVP_PKEY_size(pkey);
241 buf_out=OPENSSL_malloc((unsigned int)outl);
242 if ((buf_in == NULL) || (buf_out == NULL))
243 {
244 outl=0;
245 OPENSSL_PUT_ERROR(X509, ASN1_item_sign_ctx, ERR_R_MALLOC_FAILURE);
246 goto err;
247 }
248
249 if (!EVP_DigestSignUpdate(ctx, buf_in, inl)
250 || !EVP_DigestSignFinal(ctx, buf_out, &outl))
251 {
252 outl=0;
253 OPENSSL_PUT_ERROR(X509, ASN1_item_sign_ctx, ERR_R_EVP_LIB);
254 goto err;
255 }
256 if (signature->data != NULL) OPENSSL_free(signature->data);
257 signature->data=buf_out;
258 buf_out=NULL;
259 signature->length=outl;
260 /* In the interests of compatibility, I'll make sure that
261 * the bit string has a 'not-used bits' value of 0
262 */
263 signature->flags&= ~(ASN1_STRING_FLAG_BITS_LEFT|0x07);
264 signature->flags|=ASN1_STRING_FLAG_BITS_LEFT;
265 err:
266 EVP_MD_CTX_cleanup(ctx);
267 if (buf_in != NULL)
268 { OPENSSL_cleanse((char *)buf_in,(unsigned int)inl); OPENSSL_free(buf_in); }
269 if (buf_out != NULL)
270 { OPENSSL_cleanse((char *)buf_out,outll); OPENSSL_free(buf_out); }
271 return(outl);
272 }
273