1/* ssl/s3_enc.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) 1998-2002 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 "ssl_locl.h"
114#include <openssl/evp.h>
115#include <openssl/md5.h>
116
117static unsigned char ssl3_pad_1[48]={
118 0x36,0x36,0x36,0x36,0x36,0x36,0x36,0x36,
119 0x36,0x36,0x36,0x36,0x36,0x36,0x36,0x36,
120 0x36,0x36,0x36,0x36,0x36,0x36,0x36,0x36,
121 0x36,0x36,0x36,0x36,0x36,0x36,0x36,0x36,
122 0x36,0x36,0x36,0x36,0x36,0x36,0x36,0x36,
123 0x36,0x36,0x36,0x36,0x36,0x36,0x36,0x36 };
124
125static unsigned char ssl3_pad_2[48]={
126 0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,
127 0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,
128 0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,
129 0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,
130 0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,
131 0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c };
132
133static int ssl3_handshake_mac(SSL *s, EVP_MD_CTX *in_ctx,
134 const char *sender, int len, unsigned char *p);
135
136static int ssl3_generate_key_block(SSL *s, unsigned char *km, int num)
137 {
138 EVP_MD_CTX m5;
139 EVP_MD_CTX s1;
140 unsigned char buf[16],smd[SHA_DIGEST_LENGTH];
141 unsigned char c='A';
142 unsigned int i,j,k;
143
144#ifdef CHARSET_EBCDIC
145 c = os_toascii[c]; /*'A' in ASCII */
146#endif
147 k=0;
148 EVP_MD_CTX_init(&m5);
149 EVP_MD_CTX_set_flags(&m5, EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
150 EVP_MD_CTX_init(&s1);
151 for (i=0; (int)i<num; i+=MD5_DIGEST_LENGTH)
152 {
153 k++;
154 if (k > sizeof buf)
155 {
156 /* bug: 'buf' is too small for this ciphersuite */
157 SSLerr(SSL_F_SSL3_GENERATE_KEY_BLOCK, ERR_R_INTERNAL_ERROR);
158 return 0;
159 }
160
161 for (j=0; j<k; j++)
162 buf[j]=c;
163 c++;
164 EVP_DigestInit_ex(&s1,EVP_sha1(), NULL);
165 EVP_DigestUpdate(&s1,buf,k);
166 EVP_DigestUpdate(&s1,s->session->master_key,
167 s->session->master_key_length);
168 EVP_DigestUpdate(&s1,s->s3->server_random,SSL3_RANDOM_SIZE);
169 EVP_DigestUpdate(&s1,s->s3->client_random,SSL3_RANDOM_SIZE);
170 EVP_DigestFinal_ex(&s1,smd,NULL);
171
172 EVP_DigestInit_ex(&m5,EVP_md5(), NULL);
173 EVP_DigestUpdate(&m5,s->session->master_key,
174 s->session->master_key_length);
175 EVP_DigestUpdate(&m5,smd,SHA_DIGEST_LENGTH);
176 if ((int)(i+MD5_DIGEST_LENGTH) > num)
177 {
178 EVP_DigestFinal_ex(&m5,smd,NULL);
179 memcpy(km,smd,(num-i));
180 }
181 else
182 EVP_DigestFinal_ex(&m5,km,NULL);
183
184 km+=MD5_DIGEST_LENGTH;
185 }
186 OPENSSL_cleanse(smd,SHA_DIGEST_LENGTH);
187 EVP_MD_CTX_cleanup(&m5);
188 EVP_MD_CTX_cleanup(&s1);
189 return 1;
190 }
191
192int ssl3_change_cipher_state(SSL *s, int which)
193 {
| 1/* ssl/s3_enc.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) 1998-2002 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 "ssl_locl.h"
114#include <openssl/evp.h>
115#include <openssl/md5.h>
116
117static unsigned char ssl3_pad_1[48]={
118 0x36,0x36,0x36,0x36,0x36,0x36,0x36,0x36,
119 0x36,0x36,0x36,0x36,0x36,0x36,0x36,0x36,
120 0x36,0x36,0x36,0x36,0x36,0x36,0x36,0x36,
121 0x36,0x36,0x36,0x36,0x36,0x36,0x36,0x36,
122 0x36,0x36,0x36,0x36,0x36,0x36,0x36,0x36,
123 0x36,0x36,0x36,0x36,0x36,0x36,0x36,0x36 };
124
125static unsigned char ssl3_pad_2[48]={
126 0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,
127 0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,
128 0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,
129 0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,
130 0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,
131 0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c };
132
133static int ssl3_handshake_mac(SSL *s, EVP_MD_CTX *in_ctx,
134 const char *sender, int len, unsigned char *p);
135
136static int ssl3_generate_key_block(SSL *s, unsigned char *km, int num)
137 {
138 EVP_MD_CTX m5;
139 EVP_MD_CTX s1;
140 unsigned char buf[16],smd[SHA_DIGEST_LENGTH];
141 unsigned char c='A';
142 unsigned int i,j,k;
143
144#ifdef CHARSET_EBCDIC
145 c = os_toascii[c]; /*'A' in ASCII */
146#endif
147 k=0;
148 EVP_MD_CTX_init(&m5);
149 EVP_MD_CTX_set_flags(&m5, EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
150 EVP_MD_CTX_init(&s1);
151 for (i=0; (int)i<num; i+=MD5_DIGEST_LENGTH)
152 {
153 k++;
154 if (k > sizeof buf)
155 {
156 /* bug: 'buf' is too small for this ciphersuite */
157 SSLerr(SSL_F_SSL3_GENERATE_KEY_BLOCK, ERR_R_INTERNAL_ERROR);
158 return 0;
159 }
160
161 for (j=0; j<k; j++)
162 buf[j]=c;
163 c++;
164 EVP_DigestInit_ex(&s1,EVP_sha1(), NULL);
165 EVP_DigestUpdate(&s1,buf,k);
166 EVP_DigestUpdate(&s1,s->session->master_key,
167 s->session->master_key_length);
168 EVP_DigestUpdate(&s1,s->s3->server_random,SSL3_RANDOM_SIZE);
169 EVP_DigestUpdate(&s1,s->s3->client_random,SSL3_RANDOM_SIZE);
170 EVP_DigestFinal_ex(&s1,smd,NULL);
171
172 EVP_DigestInit_ex(&m5,EVP_md5(), NULL);
173 EVP_DigestUpdate(&m5,s->session->master_key,
174 s->session->master_key_length);
175 EVP_DigestUpdate(&m5,smd,SHA_DIGEST_LENGTH);
176 if ((int)(i+MD5_DIGEST_LENGTH) > num)
177 {
178 EVP_DigestFinal_ex(&m5,smd,NULL);
179 memcpy(km,smd,(num-i));
180 }
181 else
182 EVP_DigestFinal_ex(&m5,km,NULL);
183
184 km+=MD5_DIGEST_LENGTH;
185 }
186 OPENSSL_cleanse(smd,SHA_DIGEST_LENGTH);
187 EVP_MD_CTX_cleanup(&m5);
188 EVP_MD_CTX_cleanup(&s1);
189 return 1;
190 }
191
192int ssl3_change_cipher_state(SSL *s, int which)
193 {
|
194 unsigned char *p,*key_block,*mac_secret;
| 194 unsigned char *p,*mac_secret;
|
195 unsigned char exp_key[EVP_MAX_KEY_LENGTH];
196 unsigned char exp_iv[EVP_MAX_IV_LENGTH];
197 unsigned char *ms,*key,*iv,*er1,*er2;
198 EVP_CIPHER_CTX *dd;
199 const EVP_CIPHER *c;
200#ifndef OPENSSL_NO_COMP
201 COMP_METHOD *comp;
202#endif
203 const EVP_MD *m;
204 EVP_MD_CTX md;
205 int is_exp,n,i,j,k,cl;
206 int reuse_dd = 0;
207
208 is_exp=SSL_C_IS_EXPORT(s->s3->tmp.new_cipher);
209 c=s->s3->tmp.new_sym_enc;
210 m=s->s3->tmp.new_hash;
211#ifndef OPENSSL_NO_COMP
212 if (s->s3->tmp.new_compression == NULL)
213 comp=NULL;
214 else
215 comp=s->s3->tmp.new_compression->method;
216#endif
| 195 unsigned char exp_key[EVP_MAX_KEY_LENGTH];
196 unsigned char exp_iv[EVP_MAX_IV_LENGTH];
197 unsigned char *ms,*key,*iv,*er1,*er2;
198 EVP_CIPHER_CTX *dd;
199 const EVP_CIPHER *c;
200#ifndef OPENSSL_NO_COMP
201 COMP_METHOD *comp;
202#endif
203 const EVP_MD *m;
204 EVP_MD_CTX md;
205 int is_exp,n,i,j,k,cl;
206 int reuse_dd = 0;
207
208 is_exp=SSL_C_IS_EXPORT(s->s3->tmp.new_cipher);
209 c=s->s3->tmp.new_sym_enc;
210 m=s->s3->tmp.new_hash;
211#ifndef OPENSSL_NO_COMP
212 if (s->s3->tmp.new_compression == NULL)
213 comp=NULL;
214 else
215 comp=s->s3->tmp.new_compression->method;
216#endif
|
217 key_block=s->s3->tmp.key_block;
| |
218
219 if (which & SSL3_CC_READ)
220 {
221 if (s->enc_read_ctx != NULL)
222 reuse_dd = 1;
223 else if ((s->enc_read_ctx=OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL)
224 goto err;
225 else
226 /* make sure it's intialized in case we exit later with an error */
227 EVP_CIPHER_CTX_init(s->enc_read_ctx);
228 dd= s->enc_read_ctx;
229 s->read_hash=m;
230#ifndef OPENSSL_NO_COMP
231 /* COMPRESS */
232 if (s->expand != NULL)
233 {
234 COMP_CTX_free(s->expand);
235 s->expand=NULL;
236 }
237 if (comp != NULL)
238 {
239 s->expand=COMP_CTX_new(comp);
240 if (s->expand == NULL)
241 {
242 SSLerr(SSL_F_SSL3_CHANGE_CIPHER_STATE,SSL_R_COMPRESSION_LIBRARY_ERROR);
243 goto err2;
244 }
245 if (s->s3->rrec.comp == NULL)
246 s->s3->rrec.comp=(unsigned char *)
247 OPENSSL_malloc(SSL3_RT_MAX_PLAIN_LENGTH);
248 if (s->s3->rrec.comp == NULL)
249 goto err;
250 }
251#endif
252 memset(&(s->s3->read_sequence[0]),0,8);
253 mac_secret= &(s->s3->read_mac_secret[0]);
254 }
255 else
256 {
257 if (s->enc_write_ctx != NULL)
258 reuse_dd = 1;
259 else if ((s->enc_write_ctx=OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL)
260 goto err;
261 else
262 /* make sure it's intialized in case we exit later with an error */
263 EVP_CIPHER_CTX_init(s->enc_write_ctx);
264 dd= s->enc_write_ctx;
265 s->write_hash=m;
266#ifndef OPENSSL_NO_COMP
267 /* COMPRESS */
268 if (s->compress != NULL)
269 {
270 COMP_CTX_free(s->compress);
271 s->compress=NULL;
272 }
273 if (comp != NULL)
274 {
275 s->compress=COMP_CTX_new(comp);
276 if (s->compress == NULL)
277 {
278 SSLerr(SSL_F_SSL3_CHANGE_CIPHER_STATE,SSL_R_COMPRESSION_LIBRARY_ERROR);
279 goto err2;
280 }
281 }
282#endif
283 memset(&(s->s3->write_sequence[0]),0,8);
284 mac_secret= &(s->s3->write_mac_secret[0]);
285 }
286
287 if (reuse_dd)
288 EVP_CIPHER_CTX_cleanup(dd);
289
290 p=s->s3->tmp.key_block;
291 i=EVP_MD_size(m);
292 cl=EVP_CIPHER_key_length(c);
293 j=is_exp ? (cl < SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher) ?
294 cl : SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher)) : cl;
295 /* Was j=(is_exp)?5:EVP_CIPHER_key_length(c); */
296 k=EVP_CIPHER_iv_length(c);
297 if ( (which == SSL3_CHANGE_CIPHER_CLIENT_WRITE) ||
298 (which == SSL3_CHANGE_CIPHER_SERVER_READ))
299 {
300 ms= &(p[ 0]); n=i+i;
301 key= &(p[ n]); n+=j+j;
302 iv= &(p[ n]); n+=k+k;
303 er1= &(s->s3->client_random[0]);
304 er2= &(s->s3->server_random[0]);
305 }
306 else
307 {
308 n=i;
309 ms= &(p[ n]); n+=i+j;
310 key= &(p[ n]); n+=j+k;
311 iv= &(p[ n]); n+=k;
312 er1= &(s->s3->server_random[0]);
313 er2= &(s->s3->client_random[0]);
314 }
315
316 if (n > s->s3->tmp.key_block_length)
317 {
318 SSLerr(SSL_F_SSL3_CHANGE_CIPHER_STATE,ERR_R_INTERNAL_ERROR);
319 goto err2;
320 }
321
322 EVP_MD_CTX_init(&md);
323 memcpy(mac_secret,ms,i);
324 if (is_exp)
325 {
326 /* In here I set both the read and write key/iv to the
327 * same value since only the correct one will be used :-).
328 */
329 EVP_DigestInit_ex(&md,EVP_md5(), NULL);
330 EVP_DigestUpdate(&md,key,j);
331 EVP_DigestUpdate(&md,er1,SSL3_RANDOM_SIZE);
332 EVP_DigestUpdate(&md,er2,SSL3_RANDOM_SIZE);
333 EVP_DigestFinal_ex(&md,&(exp_key[0]),NULL);
334 key= &(exp_key[0]);
335
336 if (k > 0)
337 {
338 EVP_DigestInit_ex(&md,EVP_md5(), NULL);
339 EVP_DigestUpdate(&md,er1,SSL3_RANDOM_SIZE);
340 EVP_DigestUpdate(&md,er2,SSL3_RANDOM_SIZE);
341 EVP_DigestFinal_ex(&md,&(exp_iv[0]),NULL);
342 iv= &(exp_iv[0]);
343 }
344 }
345
346 s->session->key_arg_length=0;
347
348 EVP_CipherInit_ex(dd,c,NULL,key,iv,(which & SSL3_CC_WRITE));
349
350 OPENSSL_cleanse(&(exp_key[0]),sizeof(exp_key));
351 OPENSSL_cleanse(&(exp_iv[0]),sizeof(exp_iv));
352 EVP_MD_CTX_cleanup(&md);
353 return(1);
354err:
355 SSLerr(SSL_F_SSL3_CHANGE_CIPHER_STATE,ERR_R_MALLOC_FAILURE);
356err2:
357 return(0);
358 }
359
360int ssl3_setup_key_block(SSL *s)
361 {
362 unsigned char *p;
363 const EVP_CIPHER *c;
364 const EVP_MD *hash;
365 int num;
366 int ret = 0;
367 SSL_COMP *comp;
368
369 if (s->s3->tmp.key_block_length != 0)
370 return(1);
371
372 if (!ssl_cipher_get_evp(s->session,&c,&hash,&comp))
373 {
374 SSLerr(SSL_F_SSL3_SETUP_KEY_BLOCK,SSL_R_CIPHER_OR_HASH_UNAVAILABLE);
375 return(0);
376 }
377
378 s->s3->tmp.new_sym_enc=c;
379 s->s3->tmp.new_hash=hash;
380#ifdef OPENSSL_NO_COMP
381 s->s3->tmp.new_compression=NULL;
382#else
383 s->s3->tmp.new_compression=comp;
384#endif
385
386 num=EVP_CIPHER_key_length(c)+EVP_MD_size(hash)+EVP_CIPHER_iv_length(c);
387 num*=2;
388
389 ssl3_cleanup_key_block(s);
390
391 if ((p=OPENSSL_malloc(num)) == NULL)
392 goto err;
393
394 s->s3->tmp.key_block_length=num;
395 s->s3->tmp.key_block=p;
396
397 ret = ssl3_generate_key_block(s,p,num);
398
399 if (!(s->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS))
400 {
401 /* enable vulnerability countermeasure for CBC ciphers with
402 * known-IV problem (http://www.openssl.org/~bodo/tls-cbc.txt)
403 */
404 s->s3->need_empty_fragments = 1;
405
406 if (s->session->cipher != NULL)
407 {
408 if ((s->session->cipher->algorithms & SSL_ENC_MASK) == SSL_eNULL)
409 s->s3->need_empty_fragments = 0;
410
411#ifndef OPENSSL_NO_RC4
412 if ((s->session->cipher->algorithms & SSL_ENC_MASK) == SSL_RC4)
413 s->s3->need_empty_fragments = 0;
414#endif
415 }
416 }
417
418 return ret;
419
420err:
421 SSLerr(SSL_F_SSL3_SETUP_KEY_BLOCK,ERR_R_MALLOC_FAILURE);
422 return(0);
423 }
424
425void ssl3_cleanup_key_block(SSL *s)
426 {
427 if (s->s3->tmp.key_block != NULL)
428 {
429 OPENSSL_cleanse(s->s3->tmp.key_block,
430 s->s3->tmp.key_block_length);
431 OPENSSL_free(s->s3->tmp.key_block);
432 s->s3->tmp.key_block=NULL;
433 }
434 s->s3->tmp.key_block_length=0;
435 }
436
437int ssl3_enc(SSL *s, int send)
438 {
439 SSL3_RECORD *rec;
440 EVP_CIPHER_CTX *ds;
441 unsigned long l;
442 int bs,i;
443 const EVP_CIPHER *enc;
444
445 if (send)
446 {
447 ds=s->enc_write_ctx;
448 rec= &(s->s3->wrec);
449 if (s->enc_write_ctx == NULL)
450 enc=NULL;
451 else
452 enc=EVP_CIPHER_CTX_cipher(s->enc_write_ctx);
453 }
454 else
455 {
456 ds=s->enc_read_ctx;
457 rec= &(s->s3->rrec);
458 if (s->enc_read_ctx == NULL)
459 enc=NULL;
460 else
461 enc=EVP_CIPHER_CTX_cipher(s->enc_read_ctx);
462 }
463
464 if ((s->session == NULL) || (ds == NULL) ||
465 (enc == NULL))
466 {
467 memmove(rec->data,rec->input,rec->length);
468 rec->input=rec->data;
469 }
470 else
471 {
472 l=rec->length;
473 bs=EVP_CIPHER_block_size(ds->cipher);
474
475 /* COMPRESS */
476
477 if ((bs != 1) && send)
478 {
479 i=bs-((int)l%bs);
480
481 /* we need to add 'i-1' padding bytes */
482 l+=i;
483 rec->length+=i;
484 rec->input[l-1]=(i-1);
485 }
486
487 if (!send)
488 {
489 if (l == 0 || l%bs != 0)
490 {
491 SSLerr(SSL_F_SSL3_ENC,SSL_R_BLOCK_CIPHER_PAD_IS_WRONG);
492 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECRYPTION_FAILED);
493 return 0;
494 }
495 /* otherwise, rec->length >= bs */
496 }
497
498 EVP_Cipher(ds,rec->data,rec->input,l);
499
500 if ((bs != 1) && !send)
501 {
502 i=rec->data[l-1]+1;
503 /* SSL 3.0 bounds the number of padding bytes by the block size;
504 * padding bytes (except the last one) are arbitrary */
505 if (i > bs)
506 {
507 /* Incorrect padding. SSLerr() and ssl3_alert are done
508 * by caller: we don't want to reveal whether this is
509 * a decryption error or a MAC verification failure
510 * (see http://www.openssl.org/~bodo/tls-cbc.txt) */
511 return -1;
512 }
513 /* now i <= bs <= rec->length */
514 rec->length-=i;
515 }
516 }
517 return(1);
518 }
519
520void ssl3_init_finished_mac(SSL *s)
521 {
522 EVP_MD_CTX_set_flags(&(s->s3->finish_dgst1),
523 EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
524 EVP_DigestInit_ex(&(s->s3->finish_dgst1),s->ctx->md5, NULL);
525 EVP_DigestInit_ex(&(s->s3->finish_dgst2),s->ctx->sha1, NULL);
526 }
527
528void ssl3_finish_mac(SSL *s, const unsigned char *buf, int len)
529 {
530 EVP_DigestUpdate(&(s->s3->finish_dgst1),buf,len);
531 EVP_DigestUpdate(&(s->s3->finish_dgst2),buf,len);
532 }
533
534int ssl3_cert_verify_mac(SSL *s, EVP_MD_CTX *ctx, unsigned char *p)
535 {
536 return(ssl3_handshake_mac(s,ctx,NULL,0,p));
537 }
538
539int ssl3_final_finish_mac(SSL *s, EVP_MD_CTX *ctx1, EVP_MD_CTX *ctx2,
540 const char *sender, int len, unsigned char *p)
541 {
542 int ret;
543
544 ret=ssl3_handshake_mac(s,ctx1,sender,len,p);
545 p+=ret;
546 ret+=ssl3_handshake_mac(s,ctx2,sender,len,p);
547 return(ret);
548 }
549
550static int ssl3_handshake_mac(SSL *s, EVP_MD_CTX *in_ctx,
551 const char *sender, int len, unsigned char *p)
552 {
553 unsigned int ret;
554 int npad,n;
555 unsigned int i;
556 unsigned char md_buf[EVP_MAX_MD_SIZE];
557 EVP_MD_CTX ctx;
558
559 EVP_MD_CTX_init(&ctx);
560 EVP_MD_CTX_set_flags(&ctx, EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
561 EVP_MD_CTX_copy_ex(&ctx,in_ctx);
562
563 n=EVP_MD_CTX_size(&ctx);
564 npad=(48/n)*n;
565
566 if (sender != NULL)
567 EVP_DigestUpdate(&ctx,sender,len);
568 EVP_DigestUpdate(&ctx,s->session->master_key,
569 s->session->master_key_length);
570 EVP_DigestUpdate(&ctx,ssl3_pad_1,npad);
571 EVP_DigestFinal_ex(&ctx,md_buf,&i);
572
573 EVP_DigestInit_ex(&ctx,EVP_MD_CTX_md(&ctx), NULL);
574 EVP_DigestUpdate(&ctx,s->session->master_key,
575 s->session->master_key_length);
576 EVP_DigestUpdate(&ctx,ssl3_pad_2,npad);
577 EVP_DigestUpdate(&ctx,md_buf,i);
578 EVP_DigestFinal_ex(&ctx,p,&ret);
579
580 EVP_MD_CTX_cleanup(&ctx);
581
582 return((int)ret);
583 }
584
585int ssl3_mac(SSL *ssl, unsigned char *md, int send)
586 {
587 SSL3_RECORD *rec;
588 unsigned char *mac_sec,*seq;
589 EVP_MD_CTX md_ctx;
590 const EVP_MD *hash;
591 unsigned char *p,rec_char;
592 unsigned int md_size;
593 int npad;
594
595 if (send)
596 {
597 rec= &(ssl->s3->wrec);
598 mac_sec= &(ssl->s3->write_mac_secret[0]);
599 seq= &(ssl->s3->write_sequence[0]);
600 hash=ssl->write_hash;
601 }
602 else
603 {
604 rec= &(ssl->s3->rrec);
605 mac_sec= &(ssl->s3->read_mac_secret[0]);
606 seq= &(ssl->s3->read_sequence[0]);
607 hash=ssl->read_hash;
608 }
609
610 md_size=EVP_MD_size(hash);
611 npad=(48/md_size)*md_size;
612
613 /* Chop the digest off the end :-) */
614 EVP_MD_CTX_init(&md_ctx);
615
616 EVP_DigestInit_ex( &md_ctx,hash, NULL);
617 EVP_DigestUpdate(&md_ctx,mac_sec,md_size);
618 EVP_DigestUpdate(&md_ctx,ssl3_pad_1,npad);
619 EVP_DigestUpdate(&md_ctx,seq,8);
620 rec_char=rec->type;
621 EVP_DigestUpdate(&md_ctx,&rec_char,1);
622 p=md;
623 s2n(rec->length,p);
624 EVP_DigestUpdate(&md_ctx,md,2);
625 EVP_DigestUpdate(&md_ctx,rec->input,rec->length);
626 EVP_DigestFinal_ex( &md_ctx,md,NULL);
627
628 EVP_DigestInit_ex( &md_ctx,hash, NULL);
629 EVP_DigestUpdate(&md_ctx,mac_sec,md_size);
630 EVP_DigestUpdate(&md_ctx,ssl3_pad_2,npad);
631 EVP_DigestUpdate(&md_ctx,md,md_size);
632 EVP_DigestFinal_ex( &md_ctx,md,&md_size);
633
634 EVP_MD_CTX_cleanup(&md_ctx);
635
636 ssl3_record_sequence_update(seq);
637 return(md_size);
638 }
639
640void ssl3_record_sequence_update(unsigned char *seq)
641 {
642 int i;
643
644 for (i=7; i>=0; i--)
645 {
646 ++seq[i];
647 if (seq[i] != 0) break;
648 }
649 }
650
651int ssl3_generate_master_secret(SSL *s, unsigned char *out, unsigned char *p,
652 int len)
653 {
654 static const unsigned char *salt[3]={
655#ifndef CHARSET_EBCDIC
656 (const unsigned char *)"A",
657 (const unsigned char *)"BB",
658 (const unsigned char *)"CCC",
659#else
660 (const unsigned char *)"\x41",
661 (const unsigned char *)"\x42\x42",
662 (const unsigned char *)"\x43\x43\x43",
663#endif
664 };
665 unsigned char buf[EVP_MAX_MD_SIZE];
666 EVP_MD_CTX ctx;
667 int i,ret=0;
668 unsigned int n;
669
670 EVP_MD_CTX_init(&ctx);
671 for (i=0; i<3; i++)
672 {
673 EVP_DigestInit_ex(&ctx,s->ctx->sha1, NULL);
674 EVP_DigestUpdate(&ctx,salt[i],strlen((const char *)salt[i]));
675 EVP_DigestUpdate(&ctx,p,len);
676 EVP_DigestUpdate(&ctx,&(s->s3->client_random[0]),
677 SSL3_RANDOM_SIZE);
678 EVP_DigestUpdate(&ctx,&(s->s3->server_random[0]),
679 SSL3_RANDOM_SIZE);
680 EVP_DigestFinal_ex(&ctx,buf,&n);
681
682 EVP_DigestInit_ex(&ctx,s->ctx->md5, NULL);
683 EVP_DigestUpdate(&ctx,p,len);
684 EVP_DigestUpdate(&ctx,buf,n);
685 EVP_DigestFinal_ex(&ctx,out,&n);
686 out+=n;
687 ret+=n;
688 }
689 EVP_MD_CTX_cleanup(&ctx);
690 return(ret);
691 }
692
693int ssl3_alert_code(int code)
694 {
695 switch (code)
696 {
697 case SSL_AD_CLOSE_NOTIFY: return(SSL3_AD_CLOSE_NOTIFY);
698 case SSL_AD_UNEXPECTED_MESSAGE: return(SSL3_AD_UNEXPECTED_MESSAGE);
699 case SSL_AD_BAD_RECORD_MAC: return(SSL3_AD_BAD_RECORD_MAC);
700 case SSL_AD_DECRYPTION_FAILED: return(SSL3_AD_BAD_RECORD_MAC);
701 case SSL_AD_RECORD_OVERFLOW: return(SSL3_AD_BAD_RECORD_MAC);
702 case SSL_AD_DECOMPRESSION_FAILURE:return(SSL3_AD_DECOMPRESSION_FAILURE);
703 case SSL_AD_HANDSHAKE_FAILURE: return(SSL3_AD_HANDSHAKE_FAILURE);
704 case SSL_AD_NO_CERTIFICATE: return(SSL3_AD_NO_CERTIFICATE);
705 case SSL_AD_BAD_CERTIFICATE: return(SSL3_AD_BAD_CERTIFICATE);
706 case SSL_AD_UNSUPPORTED_CERTIFICATE:return(SSL3_AD_UNSUPPORTED_CERTIFICATE);
707 case SSL_AD_CERTIFICATE_REVOKED:return(SSL3_AD_CERTIFICATE_REVOKED);
708 case SSL_AD_CERTIFICATE_EXPIRED:return(SSL3_AD_CERTIFICATE_EXPIRED);
709 case SSL_AD_CERTIFICATE_UNKNOWN:return(SSL3_AD_CERTIFICATE_UNKNOWN);
710 case SSL_AD_ILLEGAL_PARAMETER: return(SSL3_AD_ILLEGAL_PARAMETER);
711 case SSL_AD_UNKNOWN_CA: return(SSL3_AD_BAD_CERTIFICATE);
712 case SSL_AD_ACCESS_DENIED: return(SSL3_AD_HANDSHAKE_FAILURE);
713 case SSL_AD_DECODE_ERROR: return(SSL3_AD_HANDSHAKE_FAILURE);
714 case SSL_AD_DECRYPT_ERROR: return(SSL3_AD_HANDSHAKE_FAILURE);
715 case SSL_AD_EXPORT_RESTRICTION: return(SSL3_AD_HANDSHAKE_FAILURE);
716 case SSL_AD_PROTOCOL_VERSION: return(SSL3_AD_HANDSHAKE_FAILURE);
717 case SSL_AD_INSUFFICIENT_SECURITY:return(SSL3_AD_HANDSHAKE_FAILURE);
718 case SSL_AD_INTERNAL_ERROR: return(SSL3_AD_HANDSHAKE_FAILURE);
719 case SSL_AD_USER_CANCELLED: return(SSL3_AD_HANDSHAKE_FAILURE);
720 case SSL_AD_NO_RENEGOTIATION: return(-1); /* Don't send it :-) */
721 default: return(-1);
722 }
723 }
724
| 217
218 if (which & SSL3_CC_READ)
219 {
220 if (s->enc_read_ctx != NULL)
221 reuse_dd = 1;
222 else if ((s->enc_read_ctx=OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL)
223 goto err;
224 else
225 /* make sure it's intialized in case we exit later with an error */
226 EVP_CIPHER_CTX_init(s->enc_read_ctx);
227 dd= s->enc_read_ctx;
228 s->read_hash=m;
229#ifndef OPENSSL_NO_COMP
230 /* COMPRESS */
231 if (s->expand != NULL)
232 {
233 COMP_CTX_free(s->expand);
234 s->expand=NULL;
235 }
236 if (comp != NULL)
237 {
238 s->expand=COMP_CTX_new(comp);
239 if (s->expand == NULL)
240 {
241 SSLerr(SSL_F_SSL3_CHANGE_CIPHER_STATE,SSL_R_COMPRESSION_LIBRARY_ERROR);
242 goto err2;
243 }
244 if (s->s3->rrec.comp == NULL)
245 s->s3->rrec.comp=(unsigned char *)
246 OPENSSL_malloc(SSL3_RT_MAX_PLAIN_LENGTH);
247 if (s->s3->rrec.comp == NULL)
248 goto err;
249 }
250#endif
251 memset(&(s->s3->read_sequence[0]),0,8);
252 mac_secret= &(s->s3->read_mac_secret[0]);
253 }
254 else
255 {
256 if (s->enc_write_ctx != NULL)
257 reuse_dd = 1;
258 else if ((s->enc_write_ctx=OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL)
259 goto err;
260 else
261 /* make sure it's intialized in case we exit later with an error */
262 EVP_CIPHER_CTX_init(s->enc_write_ctx);
263 dd= s->enc_write_ctx;
264 s->write_hash=m;
265#ifndef OPENSSL_NO_COMP
266 /* COMPRESS */
267 if (s->compress != NULL)
268 {
269 COMP_CTX_free(s->compress);
270 s->compress=NULL;
271 }
272 if (comp != NULL)
273 {
274 s->compress=COMP_CTX_new(comp);
275 if (s->compress == NULL)
276 {
277 SSLerr(SSL_F_SSL3_CHANGE_CIPHER_STATE,SSL_R_COMPRESSION_LIBRARY_ERROR);
278 goto err2;
279 }
280 }
281#endif
282 memset(&(s->s3->write_sequence[0]),0,8);
283 mac_secret= &(s->s3->write_mac_secret[0]);
284 }
285
286 if (reuse_dd)
287 EVP_CIPHER_CTX_cleanup(dd);
288
289 p=s->s3->tmp.key_block;
290 i=EVP_MD_size(m);
291 cl=EVP_CIPHER_key_length(c);
292 j=is_exp ? (cl < SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher) ?
293 cl : SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher)) : cl;
294 /* Was j=(is_exp)?5:EVP_CIPHER_key_length(c); */
295 k=EVP_CIPHER_iv_length(c);
296 if ( (which == SSL3_CHANGE_CIPHER_CLIENT_WRITE) ||
297 (which == SSL3_CHANGE_CIPHER_SERVER_READ))
298 {
299 ms= &(p[ 0]); n=i+i;
300 key= &(p[ n]); n+=j+j;
301 iv= &(p[ n]); n+=k+k;
302 er1= &(s->s3->client_random[0]);
303 er2= &(s->s3->server_random[0]);
304 }
305 else
306 {
307 n=i;
308 ms= &(p[ n]); n+=i+j;
309 key= &(p[ n]); n+=j+k;
310 iv= &(p[ n]); n+=k;
311 er1= &(s->s3->server_random[0]);
312 er2= &(s->s3->client_random[0]);
313 }
314
315 if (n > s->s3->tmp.key_block_length)
316 {
317 SSLerr(SSL_F_SSL3_CHANGE_CIPHER_STATE,ERR_R_INTERNAL_ERROR);
318 goto err2;
319 }
320
321 EVP_MD_CTX_init(&md);
322 memcpy(mac_secret,ms,i);
323 if (is_exp)
324 {
325 /* In here I set both the read and write key/iv to the
326 * same value since only the correct one will be used :-).
327 */
328 EVP_DigestInit_ex(&md,EVP_md5(), NULL);
329 EVP_DigestUpdate(&md,key,j);
330 EVP_DigestUpdate(&md,er1,SSL3_RANDOM_SIZE);
331 EVP_DigestUpdate(&md,er2,SSL3_RANDOM_SIZE);
332 EVP_DigestFinal_ex(&md,&(exp_key[0]),NULL);
333 key= &(exp_key[0]);
334
335 if (k > 0)
336 {
337 EVP_DigestInit_ex(&md,EVP_md5(), NULL);
338 EVP_DigestUpdate(&md,er1,SSL3_RANDOM_SIZE);
339 EVP_DigestUpdate(&md,er2,SSL3_RANDOM_SIZE);
340 EVP_DigestFinal_ex(&md,&(exp_iv[0]),NULL);
341 iv= &(exp_iv[0]);
342 }
343 }
344
345 s->session->key_arg_length=0;
346
347 EVP_CipherInit_ex(dd,c,NULL,key,iv,(which & SSL3_CC_WRITE));
348
349 OPENSSL_cleanse(&(exp_key[0]),sizeof(exp_key));
350 OPENSSL_cleanse(&(exp_iv[0]),sizeof(exp_iv));
351 EVP_MD_CTX_cleanup(&md);
352 return(1);
353err:
354 SSLerr(SSL_F_SSL3_CHANGE_CIPHER_STATE,ERR_R_MALLOC_FAILURE);
355err2:
356 return(0);
357 }
358
359int ssl3_setup_key_block(SSL *s)
360 {
361 unsigned char *p;
362 const EVP_CIPHER *c;
363 const EVP_MD *hash;
364 int num;
365 int ret = 0;
366 SSL_COMP *comp;
367
368 if (s->s3->tmp.key_block_length != 0)
369 return(1);
370
371 if (!ssl_cipher_get_evp(s->session,&c,&hash,&comp))
372 {
373 SSLerr(SSL_F_SSL3_SETUP_KEY_BLOCK,SSL_R_CIPHER_OR_HASH_UNAVAILABLE);
374 return(0);
375 }
376
377 s->s3->tmp.new_sym_enc=c;
378 s->s3->tmp.new_hash=hash;
379#ifdef OPENSSL_NO_COMP
380 s->s3->tmp.new_compression=NULL;
381#else
382 s->s3->tmp.new_compression=comp;
383#endif
384
385 num=EVP_CIPHER_key_length(c)+EVP_MD_size(hash)+EVP_CIPHER_iv_length(c);
386 num*=2;
387
388 ssl3_cleanup_key_block(s);
389
390 if ((p=OPENSSL_malloc(num)) == NULL)
391 goto err;
392
393 s->s3->tmp.key_block_length=num;
394 s->s3->tmp.key_block=p;
395
396 ret = ssl3_generate_key_block(s,p,num);
397
398 if (!(s->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS))
399 {
400 /* enable vulnerability countermeasure for CBC ciphers with
401 * known-IV problem (http://www.openssl.org/~bodo/tls-cbc.txt)
402 */
403 s->s3->need_empty_fragments = 1;
404
405 if (s->session->cipher != NULL)
406 {
407 if ((s->session->cipher->algorithms & SSL_ENC_MASK) == SSL_eNULL)
408 s->s3->need_empty_fragments = 0;
409
410#ifndef OPENSSL_NO_RC4
411 if ((s->session->cipher->algorithms & SSL_ENC_MASK) == SSL_RC4)
412 s->s3->need_empty_fragments = 0;
413#endif
414 }
415 }
416
417 return ret;
418
419err:
420 SSLerr(SSL_F_SSL3_SETUP_KEY_BLOCK,ERR_R_MALLOC_FAILURE);
421 return(0);
422 }
423
424void ssl3_cleanup_key_block(SSL *s)
425 {
426 if (s->s3->tmp.key_block != NULL)
427 {
428 OPENSSL_cleanse(s->s3->tmp.key_block,
429 s->s3->tmp.key_block_length);
430 OPENSSL_free(s->s3->tmp.key_block);
431 s->s3->tmp.key_block=NULL;
432 }
433 s->s3->tmp.key_block_length=0;
434 }
435
436int ssl3_enc(SSL *s, int send)
437 {
438 SSL3_RECORD *rec;
439 EVP_CIPHER_CTX *ds;
440 unsigned long l;
441 int bs,i;
442 const EVP_CIPHER *enc;
443
444 if (send)
445 {
446 ds=s->enc_write_ctx;
447 rec= &(s->s3->wrec);
448 if (s->enc_write_ctx == NULL)
449 enc=NULL;
450 else
451 enc=EVP_CIPHER_CTX_cipher(s->enc_write_ctx);
452 }
453 else
454 {
455 ds=s->enc_read_ctx;
456 rec= &(s->s3->rrec);
457 if (s->enc_read_ctx == NULL)
458 enc=NULL;
459 else
460 enc=EVP_CIPHER_CTX_cipher(s->enc_read_ctx);
461 }
462
463 if ((s->session == NULL) || (ds == NULL) ||
464 (enc == NULL))
465 {
466 memmove(rec->data,rec->input,rec->length);
467 rec->input=rec->data;
468 }
469 else
470 {
471 l=rec->length;
472 bs=EVP_CIPHER_block_size(ds->cipher);
473
474 /* COMPRESS */
475
476 if ((bs != 1) && send)
477 {
478 i=bs-((int)l%bs);
479
480 /* we need to add 'i-1' padding bytes */
481 l+=i;
482 rec->length+=i;
483 rec->input[l-1]=(i-1);
484 }
485
486 if (!send)
487 {
488 if (l == 0 || l%bs != 0)
489 {
490 SSLerr(SSL_F_SSL3_ENC,SSL_R_BLOCK_CIPHER_PAD_IS_WRONG);
491 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECRYPTION_FAILED);
492 return 0;
493 }
494 /* otherwise, rec->length >= bs */
495 }
496
497 EVP_Cipher(ds,rec->data,rec->input,l);
498
499 if ((bs != 1) && !send)
500 {
501 i=rec->data[l-1]+1;
502 /* SSL 3.0 bounds the number of padding bytes by the block size;
503 * padding bytes (except the last one) are arbitrary */
504 if (i > bs)
505 {
506 /* Incorrect padding. SSLerr() and ssl3_alert are done
507 * by caller: we don't want to reveal whether this is
508 * a decryption error or a MAC verification failure
509 * (see http://www.openssl.org/~bodo/tls-cbc.txt) */
510 return -1;
511 }
512 /* now i <= bs <= rec->length */
513 rec->length-=i;
514 }
515 }
516 return(1);
517 }
518
519void ssl3_init_finished_mac(SSL *s)
520 {
521 EVP_MD_CTX_set_flags(&(s->s3->finish_dgst1),
522 EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
523 EVP_DigestInit_ex(&(s->s3->finish_dgst1),s->ctx->md5, NULL);
524 EVP_DigestInit_ex(&(s->s3->finish_dgst2),s->ctx->sha1, NULL);
525 }
526
527void ssl3_finish_mac(SSL *s, const unsigned char *buf, int len)
528 {
529 EVP_DigestUpdate(&(s->s3->finish_dgst1),buf,len);
530 EVP_DigestUpdate(&(s->s3->finish_dgst2),buf,len);
531 }
532
533int ssl3_cert_verify_mac(SSL *s, EVP_MD_CTX *ctx, unsigned char *p)
534 {
535 return(ssl3_handshake_mac(s,ctx,NULL,0,p));
536 }
537
538int ssl3_final_finish_mac(SSL *s, EVP_MD_CTX *ctx1, EVP_MD_CTX *ctx2,
539 const char *sender, int len, unsigned char *p)
540 {
541 int ret;
542
543 ret=ssl3_handshake_mac(s,ctx1,sender,len,p);
544 p+=ret;
545 ret+=ssl3_handshake_mac(s,ctx2,sender,len,p);
546 return(ret);
547 }
548
549static int ssl3_handshake_mac(SSL *s, EVP_MD_CTX *in_ctx,
550 const char *sender, int len, unsigned char *p)
551 {
552 unsigned int ret;
553 int npad,n;
554 unsigned int i;
555 unsigned char md_buf[EVP_MAX_MD_SIZE];
556 EVP_MD_CTX ctx;
557
558 EVP_MD_CTX_init(&ctx);
559 EVP_MD_CTX_set_flags(&ctx, EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
560 EVP_MD_CTX_copy_ex(&ctx,in_ctx);
561
562 n=EVP_MD_CTX_size(&ctx);
563 npad=(48/n)*n;
564
565 if (sender != NULL)
566 EVP_DigestUpdate(&ctx,sender,len);
567 EVP_DigestUpdate(&ctx,s->session->master_key,
568 s->session->master_key_length);
569 EVP_DigestUpdate(&ctx,ssl3_pad_1,npad);
570 EVP_DigestFinal_ex(&ctx,md_buf,&i);
571
572 EVP_DigestInit_ex(&ctx,EVP_MD_CTX_md(&ctx), NULL);
573 EVP_DigestUpdate(&ctx,s->session->master_key,
574 s->session->master_key_length);
575 EVP_DigestUpdate(&ctx,ssl3_pad_2,npad);
576 EVP_DigestUpdate(&ctx,md_buf,i);
577 EVP_DigestFinal_ex(&ctx,p,&ret);
578
579 EVP_MD_CTX_cleanup(&ctx);
580
581 return((int)ret);
582 }
583
584int ssl3_mac(SSL *ssl, unsigned char *md, int send)
585 {
586 SSL3_RECORD *rec;
587 unsigned char *mac_sec,*seq;
588 EVP_MD_CTX md_ctx;
589 const EVP_MD *hash;
590 unsigned char *p,rec_char;
591 unsigned int md_size;
592 int npad;
593
594 if (send)
595 {
596 rec= &(ssl->s3->wrec);
597 mac_sec= &(ssl->s3->write_mac_secret[0]);
598 seq= &(ssl->s3->write_sequence[0]);
599 hash=ssl->write_hash;
600 }
601 else
602 {
603 rec= &(ssl->s3->rrec);
604 mac_sec= &(ssl->s3->read_mac_secret[0]);
605 seq= &(ssl->s3->read_sequence[0]);
606 hash=ssl->read_hash;
607 }
608
609 md_size=EVP_MD_size(hash);
610 npad=(48/md_size)*md_size;
611
612 /* Chop the digest off the end :-) */
613 EVP_MD_CTX_init(&md_ctx);
614
615 EVP_DigestInit_ex( &md_ctx,hash, NULL);
616 EVP_DigestUpdate(&md_ctx,mac_sec,md_size);
617 EVP_DigestUpdate(&md_ctx,ssl3_pad_1,npad);
618 EVP_DigestUpdate(&md_ctx,seq,8);
619 rec_char=rec->type;
620 EVP_DigestUpdate(&md_ctx,&rec_char,1);
621 p=md;
622 s2n(rec->length,p);
623 EVP_DigestUpdate(&md_ctx,md,2);
624 EVP_DigestUpdate(&md_ctx,rec->input,rec->length);
625 EVP_DigestFinal_ex( &md_ctx,md,NULL);
626
627 EVP_DigestInit_ex( &md_ctx,hash, NULL);
628 EVP_DigestUpdate(&md_ctx,mac_sec,md_size);
629 EVP_DigestUpdate(&md_ctx,ssl3_pad_2,npad);
630 EVP_DigestUpdate(&md_ctx,md,md_size);
631 EVP_DigestFinal_ex( &md_ctx,md,&md_size);
632
633 EVP_MD_CTX_cleanup(&md_ctx);
634
635 ssl3_record_sequence_update(seq);
636 return(md_size);
637 }
638
639void ssl3_record_sequence_update(unsigned char *seq)
640 {
641 int i;
642
643 for (i=7; i>=0; i--)
644 {
645 ++seq[i];
646 if (seq[i] != 0) break;
647 }
648 }
649
650int ssl3_generate_master_secret(SSL *s, unsigned char *out, unsigned char *p,
651 int len)
652 {
653 static const unsigned char *salt[3]={
654#ifndef CHARSET_EBCDIC
655 (const unsigned char *)"A",
656 (const unsigned char *)"BB",
657 (const unsigned char *)"CCC",
658#else
659 (const unsigned char *)"\x41",
660 (const unsigned char *)"\x42\x42",
661 (const unsigned char *)"\x43\x43\x43",
662#endif
663 };
664 unsigned char buf[EVP_MAX_MD_SIZE];
665 EVP_MD_CTX ctx;
666 int i,ret=0;
667 unsigned int n;
668
669 EVP_MD_CTX_init(&ctx);
670 for (i=0; i<3; i++)
671 {
672 EVP_DigestInit_ex(&ctx,s->ctx->sha1, NULL);
673 EVP_DigestUpdate(&ctx,salt[i],strlen((const char *)salt[i]));
674 EVP_DigestUpdate(&ctx,p,len);
675 EVP_DigestUpdate(&ctx,&(s->s3->client_random[0]),
676 SSL3_RANDOM_SIZE);
677 EVP_DigestUpdate(&ctx,&(s->s3->server_random[0]),
678 SSL3_RANDOM_SIZE);
679 EVP_DigestFinal_ex(&ctx,buf,&n);
680
681 EVP_DigestInit_ex(&ctx,s->ctx->md5, NULL);
682 EVP_DigestUpdate(&ctx,p,len);
683 EVP_DigestUpdate(&ctx,buf,n);
684 EVP_DigestFinal_ex(&ctx,out,&n);
685 out+=n;
686 ret+=n;
687 }
688 EVP_MD_CTX_cleanup(&ctx);
689 return(ret);
690 }
691
692int ssl3_alert_code(int code)
693 {
694 switch (code)
695 {
696 case SSL_AD_CLOSE_NOTIFY: return(SSL3_AD_CLOSE_NOTIFY);
697 case SSL_AD_UNEXPECTED_MESSAGE: return(SSL3_AD_UNEXPECTED_MESSAGE);
698 case SSL_AD_BAD_RECORD_MAC: return(SSL3_AD_BAD_RECORD_MAC);
699 case SSL_AD_DECRYPTION_FAILED: return(SSL3_AD_BAD_RECORD_MAC);
700 case SSL_AD_RECORD_OVERFLOW: return(SSL3_AD_BAD_RECORD_MAC);
701 case SSL_AD_DECOMPRESSION_FAILURE:return(SSL3_AD_DECOMPRESSION_FAILURE);
702 case SSL_AD_HANDSHAKE_FAILURE: return(SSL3_AD_HANDSHAKE_FAILURE);
703 case SSL_AD_NO_CERTIFICATE: return(SSL3_AD_NO_CERTIFICATE);
704 case SSL_AD_BAD_CERTIFICATE: return(SSL3_AD_BAD_CERTIFICATE);
705 case SSL_AD_UNSUPPORTED_CERTIFICATE:return(SSL3_AD_UNSUPPORTED_CERTIFICATE);
706 case SSL_AD_CERTIFICATE_REVOKED:return(SSL3_AD_CERTIFICATE_REVOKED);
707 case SSL_AD_CERTIFICATE_EXPIRED:return(SSL3_AD_CERTIFICATE_EXPIRED);
708 case SSL_AD_CERTIFICATE_UNKNOWN:return(SSL3_AD_CERTIFICATE_UNKNOWN);
709 case SSL_AD_ILLEGAL_PARAMETER: return(SSL3_AD_ILLEGAL_PARAMETER);
710 case SSL_AD_UNKNOWN_CA: return(SSL3_AD_BAD_CERTIFICATE);
711 case SSL_AD_ACCESS_DENIED: return(SSL3_AD_HANDSHAKE_FAILURE);
712 case SSL_AD_DECODE_ERROR: return(SSL3_AD_HANDSHAKE_FAILURE);
713 case SSL_AD_DECRYPT_ERROR: return(SSL3_AD_HANDSHAKE_FAILURE);
714 case SSL_AD_EXPORT_RESTRICTION: return(SSL3_AD_HANDSHAKE_FAILURE);
715 case SSL_AD_PROTOCOL_VERSION: return(SSL3_AD_HANDSHAKE_FAILURE);
716 case SSL_AD_INSUFFICIENT_SECURITY:return(SSL3_AD_HANDSHAKE_FAILURE);
717 case SSL_AD_INTERNAL_ERROR: return(SSL3_AD_HANDSHAKE_FAILURE);
718 case SSL_AD_USER_CANCELLED: return(SSL3_AD_HANDSHAKE_FAILURE);
719 case SSL_AD_NO_RENEGOTIATION: return(-1); /* Don't send it :-) */
720 default: return(-1);
721 }
722 }
723
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