1/* ssl/s23_clnt.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#include <stdio.h>
60#include "ssl_locl.h"
61#include <openssl/buffer.h>
62#include <openssl/rand.h>
63#include <openssl/objects.h>
64#include <openssl/evp.h>
65
66static SSL_METHOD *ssl23_get_client_method(int ver);
67static int ssl23_client_hello(SSL *s);
68static int ssl23_get_server_hello(SSL *s);
69static SSL_METHOD *ssl23_get_client_method(int ver)
70 {
71#ifndef OPENSSL_NO_SSL2
72 if (ver == SSL2_VERSION)
73 return(SSLv2_client_method());
74#endif
75 if (ver == SSL3_VERSION)
76 return(SSLv3_client_method());
77 else if (ver == TLS1_VERSION)
78 return(TLSv1_client_method());
79 else
80 return(NULL);
81 }
82
83IMPLEMENT_ssl23_meth_func(SSLv23_client_method,
84 ssl_undefined_function,
85 ssl23_connect,
86 ssl23_get_client_method)
87
88int ssl23_connect(SSL *s)
89 {
90 BUF_MEM *buf=NULL;
91 unsigned long Time=(unsigned long)time(NULL);
92 void (*cb)(const SSL *ssl,int type,int val)=NULL;
93 int ret= -1;
94 int new_state,state;
95
96 RAND_add(&Time,sizeof(Time),0);
97 ERR_clear_error();
98 clear_sys_error();
99
100 if (s->info_callback != NULL)
101 cb=s->info_callback;
102 else if (s->ctx->info_callback != NULL)
103 cb=s->ctx->info_callback;
104
105 s->in_handshake++;
106 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
107
108 for (;;)
109 {
110 state=s->state;
111
112 switch(s->state)
113 {
114 case SSL_ST_BEFORE:
115 case SSL_ST_CONNECT:
116 case SSL_ST_BEFORE|SSL_ST_CONNECT:
117 case SSL_ST_OK|SSL_ST_CONNECT:
118
119 if (s->session != NULL)
120 {
121 SSLerr(SSL_F_SSL23_CONNECT,SSL_R_SSL23_DOING_SESSION_ID_REUSE);
122 ret= -1;
123 goto end;
124 }
125 s->server=0;
126 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
127
128 /* s->version=TLS1_VERSION; */
129 s->type=SSL_ST_CONNECT;
130
131 if (s->init_buf == NULL)
132 {
133 if ((buf=BUF_MEM_new()) == NULL)
134 {
135 ret= -1;
136 goto end;
137 }
138 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
139 {
140 ret= -1;
141 goto end;
142 }
143 s->init_buf=buf;
144 buf=NULL;
145 }
146
147 if (!ssl3_setup_buffers(s)) { ret= -1; goto end; }
148
149 ssl3_init_finished_mac(s);
150
151 s->state=SSL23_ST_CW_CLNT_HELLO_A;
152 s->ctx->stats.sess_connect++;
153 s->init_num=0;
154 break;
155
156 case SSL23_ST_CW_CLNT_HELLO_A:
157 case SSL23_ST_CW_CLNT_HELLO_B:
158
159 s->shutdown=0;
160 ret=ssl23_client_hello(s);
161 if (ret <= 0) goto end;
162 s->state=SSL23_ST_CR_SRVR_HELLO_A;
163 s->init_num=0;
164
165 break;
166
167 case SSL23_ST_CR_SRVR_HELLO_A:
168 case SSL23_ST_CR_SRVR_HELLO_B:
169 ret=ssl23_get_server_hello(s);
170 if (ret >= 0) cb=NULL;
171 goto end;
172 /* break; */
173
174 default:
175 SSLerr(SSL_F_SSL23_CONNECT,SSL_R_UNKNOWN_STATE);
176 ret= -1;
177 goto end;
178 /* break; */
179 }
180
181 if (s->debug) { (void)BIO_flush(s->wbio); }
182
183 if ((cb != NULL) && (s->state != state))
184 {
185 new_state=s->state;
186 s->state=state;
187 cb(s,SSL_CB_CONNECT_LOOP,1);
188 s->state=new_state;
189 }
190 }
191end:
192 s->in_handshake--;
193 if (buf != NULL)
194 BUF_MEM_free(buf);
195 if (cb != NULL)
196 cb(s,SSL_CB_CONNECT_EXIT,ret);
197 return(ret);
198 }
199
200
201static int ssl23_client_hello(SSL *s)
202 {
203 unsigned char *buf;
204 unsigned char *p,*d;
205 int i,ch_len;
206 unsigned long Time,l;
207 int ssl2_compat;
208 int version = 0, version_major, version_minor;
209#ifndef OPENSSL_NO_COMP
210 int j;
211 SSL_COMP *comp;
212#endif
213 int ret;
214
215 ssl2_compat = (s->options & SSL_OP_NO_SSLv2) ? 0 : 1;
216
217 if (!(s->options & SSL_OP_NO_TLSv1))
218 {
219 version = TLS1_VERSION;
220 }
221 else if (!(s->options & SSL_OP_NO_SSLv3))
222 {
223 version = SSL3_VERSION;
224 }
225 else if (!(s->options & SSL_OP_NO_SSLv2))
226 {
227 version = SSL2_VERSION;
228 }
229#ifndef OPENSSL_NO_TLSEXT
230 if (version != SSL2_VERSION)
231 {
232 /* have to disable SSL 2.0 compatibility if we need TLS extensions */
233
234 if (s->tlsext_hostname != NULL)
235 ssl2_compat = 0;
236 if (s->tlsext_status_type != -1)
237 ssl2_compat = 0;
238 }
239#endif
240
241 buf=(unsigned char *)s->init_buf->data;
242 if (s->state == SSL23_ST_CW_CLNT_HELLO_A)
243 {
244#if 0
245 /* don't reuse session-id's */
246 if (!ssl_get_new_session(s,0))
247 {
248 return(-1);
249 }
250#endif
251
252 p=s->s3->client_random;
253 Time=(unsigned long)time(NULL); /* Time */
254 l2n(Time,p);
255 if (RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE-4) <= 0)
256 return -1;
257
258 if (version == TLS1_VERSION)
259 {
260 version_major = TLS1_VERSION_MAJOR;
261 version_minor = TLS1_VERSION_MINOR;
262 }
263#ifdef OPENSSL_FIPS
264 else if(FIPS_mode())
265 {
266 SSLerr(SSL_F_SSL23_CLIENT_HELLO,
267 SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE);
268 return -1;
269 }
270#endif
271 else if (version == SSL3_VERSION)
272 {
273 version_major = SSL3_VERSION_MAJOR;
274 version_minor = SSL3_VERSION_MINOR;
275 }
276 else if (version == SSL2_VERSION)
277 {
278 version_major = SSL2_VERSION_MAJOR;
279 version_minor = SSL2_VERSION_MINOR;
280 }
281 else
282 {
283 SSLerr(SSL_F_SSL23_CLIENT_HELLO,SSL_R_NO_PROTOCOLS_AVAILABLE);
284 return(-1);
285 }
286
287 s->client_version = version;
288
289 if (ssl2_compat)
290 {
291 /* create SSL 2.0 compatible Client Hello */
292
293 /* two byte record header will be written last */
294 d = &(buf[2]);
295 p = d + 9; /* leave space for message type, version, individual length fields */
296
297 *(d++) = SSL2_MT_CLIENT_HELLO;
298 *(d++) = version_major;
299 *(d++) = version_minor;
300
301 /* Ciphers supported */
302 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),p,0);
303 if (i == 0)
304 {
305 /* no ciphers */
306 SSLerr(SSL_F_SSL23_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
307 return -1;
308 }
309 s2n(i,d);
310 p+=i;
311
312 /* put in the session-id length (zero since there is no reuse) */
313#if 0
314 s->session->session_id_length=0;
315#endif
316 s2n(0,d);
317
318 if (s->options & SSL_OP_NETSCAPE_CHALLENGE_BUG)
319 ch_len=SSL2_CHALLENGE_LENGTH;
320 else
321 ch_len=SSL2_MAX_CHALLENGE_LENGTH;
322
323 /* write out sslv2 challenge */
324 if (SSL3_RANDOM_SIZE < ch_len)
325 i=SSL3_RANDOM_SIZE;
326 else
327 i=ch_len;
328 s2n(i,d);
329 memset(&(s->s3->client_random[0]),0,SSL3_RANDOM_SIZE);
330 if (RAND_pseudo_bytes(&(s->s3->client_random[SSL3_RANDOM_SIZE-i]),i) <= 0)
331 return -1;
332
333 memcpy(p,&(s->s3->client_random[SSL3_RANDOM_SIZE-i]),i);
334 p+=i;
335
336 i= p- &(buf[2]);
337 buf[0]=((i>>8)&0xff)|0x80;
338 buf[1]=(i&0xff);
339
340 /* number of bytes to write */
341 s->init_num=i+2;
342 s->init_off=0;
343
344 ssl3_finish_mac(s,&(buf[2]),i);
345 }
346 else
347 {
348 /* create Client Hello in SSL 3.0/TLS 1.0 format */
349
350 /* do the record header (5 bytes) and handshake message header (4 bytes) last */
351 d = p = &(buf[9]);
352
353 *(p++) = version_major;
354 *(p++) = version_minor;
355
356 /* Random stuff */
357 memcpy(p, s->s3->client_random, SSL3_RANDOM_SIZE);
358 p += SSL3_RANDOM_SIZE;
359
360 /* Session ID (zero since there is no reuse) */
361 *(p++) = 0;
362
363 /* Ciphers supported (using SSL 3.0/TLS 1.0 format) */
364 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]),ssl3_put_cipher_by_char);
365 if (i == 0)
366 {
367 SSLerr(SSL_F_SSL23_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
368 return -1;
369 }
370 s2n(i,p);
371 p+=i;
| 1/* ssl/s23_clnt.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#include <stdio.h>
60#include "ssl_locl.h"
61#include <openssl/buffer.h>
62#include <openssl/rand.h>
63#include <openssl/objects.h>
64#include <openssl/evp.h>
65
66static SSL_METHOD *ssl23_get_client_method(int ver);
67static int ssl23_client_hello(SSL *s);
68static int ssl23_get_server_hello(SSL *s);
69static SSL_METHOD *ssl23_get_client_method(int ver)
70 {
71#ifndef OPENSSL_NO_SSL2
72 if (ver == SSL2_VERSION)
73 return(SSLv2_client_method());
74#endif
75 if (ver == SSL3_VERSION)
76 return(SSLv3_client_method());
77 else if (ver == TLS1_VERSION)
78 return(TLSv1_client_method());
79 else
80 return(NULL);
81 }
82
83IMPLEMENT_ssl23_meth_func(SSLv23_client_method,
84 ssl_undefined_function,
85 ssl23_connect,
86 ssl23_get_client_method)
87
88int ssl23_connect(SSL *s)
89 {
90 BUF_MEM *buf=NULL;
91 unsigned long Time=(unsigned long)time(NULL);
92 void (*cb)(const SSL *ssl,int type,int val)=NULL;
93 int ret= -1;
94 int new_state,state;
95
96 RAND_add(&Time,sizeof(Time),0);
97 ERR_clear_error();
98 clear_sys_error();
99
100 if (s->info_callback != NULL)
101 cb=s->info_callback;
102 else if (s->ctx->info_callback != NULL)
103 cb=s->ctx->info_callback;
104
105 s->in_handshake++;
106 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
107
108 for (;;)
109 {
110 state=s->state;
111
112 switch(s->state)
113 {
114 case SSL_ST_BEFORE:
115 case SSL_ST_CONNECT:
116 case SSL_ST_BEFORE|SSL_ST_CONNECT:
117 case SSL_ST_OK|SSL_ST_CONNECT:
118
119 if (s->session != NULL)
120 {
121 SSLerr(SSL_F_SSL23_CONNECT,SSL_R_SSL23_DOING_SESSION_ID_REUSE);
122 ret= -1;
123 goto end;
124 }
125 s->server=0;
126 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
127
128 /* s->version=TLS1_VERSION; */
129 s->type=SSL_ST_CONNECT;
130
131 if (s->init_buf == NULL)
132 {
133 if ((buf=BUF_MEM_new()) == NULL)
134 {
135 ret= -1;
136 goto end;
137 }
138 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
139 {
140 ret= -1;
141 goto end;
142 }
143 s->init_buf=buf;
144 buf=NULL;
145 }
146
147 if (!ssl3_setup_buffers(s)) { ret= -1; goto end; }
148
149 ssl3_init_finished_mac(s);
150
151 s->state=SSL23_ST_CW_CLNT_HELLO_A;
152 s->ctx->stats.sess_connect++;
153 s->init_num=0;
154 break;
155
156 case SSL23_ST_CW_CLNT_HELLO_A:
157 case SSL23_ST_CW_CLNT_HELLO_B:
158
159 s->shutdown=0;
160 ret=ssl23_client_hello(s);
161 if (ret <= 0) goto end;
162 s->state=SSL23_ST_CR_SRVR_HELLO_A;
163 s->init_num=0;
164
165 break;
166
167 case SSL23_ST_CR_SRVR_HELLO_A:
168 case SSL23_ST_CR_SRVR_HELLO_B:
169 ret=ssl23_get_server_hello(s);
170 if (ret >= 0) cb=NULL;
171 goto end;
172 /* break; */
173
174 default:
175 SSLerr(SSL_F_SSL23_CONNECT,SSL_R_UNKNOWN_STATE);
176 ret= -1;
177 goto end;
178 /* break; */
179 }
180
181 if (s->debug) { (void)BIO_flush(s->wbio); }
182
183 if ((cb != NULL) && (s->state != state))
184 {
185 new_state=s->state;
186 s->state=state;
187 cb(s,SSL_CB_CONNECT_LOOP,1);
188 s->state=new_state;
189 }
190 }
191end:
192 s->in_handshake--;
193 if (buf != NULL)
194 BUF_MEM_free(buf);
195 if (cb != NULL)
196 cb(s,SSL_CB_CONNECT_EXIT,ret);
197 return(ret);
198 }
199
200
201static int ssl23_client_hello(SSL *s)
202 {
203 unsigned char *buf;
204 unsigned char *p,*d;
205 int i,ch_len;
206 unsigned long Time,l;
207 int ssl2_compat;
208 int version = 0, version_major, version_minor;
209#ifndef OPENSSL_NO_COMP
210 int j;
211 SSL_COMP *comp;
212#endif
213 int ret;
214
215 ssl2_compat = (s->options & SSL_OP_NO_SSLv2) ? 0 : 1;
216
217 if (!(s->options & SSL_OP_NO_TLSv1))
218 {
219 version = TLS1_VERSION;
220 }
221 else if (!(s->options & SSL_OP_NO_SSLv3))
222 {
223 version = SSL3_VERSION;
224 }
225 else if (!(s->options & SSL_OP_NO_SSLv2))
226 {
227 version = SSL2_VERSION;
228 }
229#ifndef OPENSSL_NO_TLSEXT
230 if (version != SSL2_VERSION)
231 {
232 /* have to disable SSL 2.0 compatibility if we need TLS extensions */
233
234 if (s->tlsext_hostname != NULL)
235 ssl2_compat = 0;
236 if (s->tlsext_status_type != -1)
237 ssl2_compat = 0;
238 }
239#endif
240
241 buf=(unsigned char *)s->init_buf->data;
242 if (s->state == SSL23_ST_CW_CLNT_HELLO_A)
243 {
244#if 0
245 /* don't reuse session-id's */
246 if (!ssl_get_new_session(s,0))
247 {
248 return(-1);
249 }
250#endif
251
252 p=s->s3->client_random;
253 Time=(unsigned long)time(NULL); /* Time */
254 l2n(Time,p);
255 if (RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE-4) <= 0)
256 return -1;
257
258 if (version == TLS1_VERSION)
259 {
260 version_major = TLS1_VERSION_MAJOR;
261 version_minor = TLS1_VERSION_MINOR;
262 }
263#ifdef OPENSSL_FIPS
264 else if(FIPS_mode())
265 {
266 SSLerr(SSL_F_SSL23_CLIENT_HELLO,
267 SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE);
268 return -1;
269 }
270#endif
271 else if (version == SSL3_VERSION)
272 {
273 version_major = SSL3_VERSION_MAJOR;
274 version_minor = SSL3_VERSION_MINOR;
275 }
276 else if (version == SSL2_VERSION)
277 {
278 version_major = SSL2_VERSION_MAJOR;
279 version_minor = SSL2_VERSION_MINOR;
280 }
281 else
282 {
283 SSLerr(SSL_F_SSL23_CLIENT_HELLO,SSL_R_NO_PROTOCOLS_AVAILABLE);
284 return(-1);
285 }
286
287 s->client_version = version;
288
289 if (ssl2_compat)
290 {
291 /* create SSL 2.0 compatible Client Hello */
292
293 /* two byte record header will be written last */
294 d = &(buf[2]);
295 p = d + 9; /* leave space for message type, version, individual length fields */
296
297 *(d++) = SSL2_MT_CLIENT_HELLO;
298 *(d++) = version_major;
299 *(d++) = version_minor;
300
301 /* Ciphers supported */
302 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),p,0);
303 if (i == 0)
304 {
305 /* no ciphers */
306 SSLerr(SSL_F_SSL23_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
307 return -1;
308 }
309 s2n(i,d);
310 p+=i;
311
312 /* put in the session-id length (zero since there is no reuse) */
313#if 0
314 s->session->session_id_length=0;
315#endif
316 s2n(0,d);
317
318 if (s->options & SSL_OP_NETSCAPE_CHALLENGE_BUG)
319 ch_len=SSL2_CHALLENGE_LENGTH;
320 else
321 ch_len=SSL2_MAX_CHALLENGE_LENGTH;
322
323 /* write out sslv2 challenge */
324 if (SSL3_RANDOM_SIZE < ch_len)
325 i=SSL3_RANDOM_SIZE;
326 else
327 i=ch_len;
328 s2n(i,d);
329 memset(&(s->s3->client_random[0]),0,SSL3_RANDOM_SIZE);
330 if (RAND_pseudo_bytes(&(s->s3->client_random[SSL3_RANDOM_SIZE-i]),i) <= 0)
331 return -1;
332
333 memcpy(p,&(s->s3->client_random[SSL3_RANDOM_SIZE-i]),i);
334 p+=i;
335
336 i= p- &(buf[2]);
337 buf[0]=((i>>8)&0xff)|0x80;
338 buf[1]=(i&0xff);
339
340 /* number of bytes to write */
341 s->init_num=i+2;
342 s->init_off=0;
343
344 ssl3_finish_mac(s,&(buf[2]),i);
345 }
346 else
347 {
348 /* create Client Hello in SSL 3.0/TLS 1.0 format */
349
350 /* do the record header (5 bytes) and handshake message header (4 bytes) last */
351 d = p = &(buf[9]);
352
353 *(p++) = version_major;
354 *(p++) = version_minor;
355
356 /* Random stuff */
357 memcpy(p, s->s3->client_random, SSL3_RANDOM_SIZE);
358 p += SSL3_RANDOM_SIZE;
359
360 /* Session ID (zero since there is no reuse) */
361 *(p++) = 0;
362
363 /* Ciphers supported (using SSL 3.0/TLS 1.0 format) */
364 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]),ssl3_put_cipher_by_char);
365 if (i == 0)
366 {
367 SSLerr(SSL_F_SSL23_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
368 return -1;
369 }
370 s2n(i,p);
371 p+=i;
|
384 *(p++)=0; /* Add the NULL method */
385#ifndef OPENSSL_NO_TLSEXT
386 if ((p = ssl_add_clienthello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH)) == NULL)
387 {
388 SSLerr(SSL_F_SSL23_CLIENT_HELLO,ERR_R_INTERNAL_ERROR);
389 return -1;
390 }
391#endif
392
393 l = p-d;
394 *p = 42;
395
396 /* fill in 4-byte handshake header */
397 d=&(buf[5]);
398 *(d++)=SSL3_MT_CLIENT_HELLO;
399 l2n3(l,d);
400
401 l += 4;
402
403 if (l > SSL3_RT_MAX_PLAIN_LENGTH)
404 {
405 SSLerr(SSL_F_SSL23_CLIENT_HELLO,ERR_R_INTERNAL_ERROR);
406 return -1;
407 }
408
409 /* fill in 5-byte record header */
410 d=buf;
411 *(d++) = SSL3_RT_HANDSHAKE;
412 *(d++) = version_major;
413 *(d++) = version_minor; /* arguably we should send the *lowest* suported version here
414 * (indicating, e.g., TLS 1.0 in "SSL 3.0 format") */
415 s2n((int)l,d);
416
417 /* number of bytes to write */
418 s->init_num=p-buf;
419 s->init_off=0;
420
421 ssl3_finish_mac(s,&(buf[5]), s->init_num - 5);
422 }
423
424 s->state=SSL23_ST_CW_CLNT_HELLO_B;
425 s->init_off=0;
426 }
427
428 /* SSL3_ST_CW_CLNT_HELLO_B */
429 ret = ssl23_write_bytes(s);
430
431 if ((ret >= 2) && s->msg_callback)
432 {
433 /* Client Hello has been sent; tell msg_callback */
434
435 if (ssl2_compat)
436 s->msg_callback(1, SSL2_VERSION, 0, s->init_buf->data+2, ret-2, s, s->msg_callback_arg);
437 else
438 s->msg_callback(1, version, SSL3_RT_HANDSHAKE, s->init_buf->data+5, ret-5, s, s->msg_callback_arg);
439 }
440
441 return ret;
442 }
443
444static int ssl23_get_server_hello(SSL *s)
445 {
446 char buf[8];
447 unsigned char *p;
448 int i;
449 int n;
450
451 n=ssl23_read_bytes(s,7);
452
453 if (n != 7) return(n);
454 p=s->packet;
455
456 memcpy(buf,p,n);
457
458 if ((p[0] & 0x80) && (p[2] == SSL2_MT_SERVER_HELLO) &&
459 (p[5] == 0x00) && (p[6] == 0x02))
460 {
461#ifdef OPENSSL_NO_SSL2
462 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_PROTOCOL);
463 goto err;
464#else
465 /* we are talking sslv2 */
466 /* we need to clean up the SSLv3 setup and put in the
467 * sslv2 stuff. */
468 int ch_len;
469
470 if (s->options & SSL_OP_NO_SSLv2)
471 {
472 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_PROTOCOL);
473 goto err;
474 }
475 if (s->s2 == NULL)
476 {
477 if (!ssl2_new(s))
478 goto err;
479 }
480 else
481 ssl2_clear(s);
482
483 if (s->options & SSL_OP_NETSCAPE_CHALLENGE_BUG)
484 ch_len=SSL2_CHALLENGE_LENGTH;
485 else
486 ch_len=SSL2_MAX_CHALLENGE_LENGTH;
487
488 /* write out sslv2 challenge */
489 i=(SSL3_RANDOM_SIZE < ch_len)
490 ?SSL3_RANDOM_SIZE:ch_len;
491 s->s2->challenge_length=i;
492 memcpy(s->s2->challenge,
493 &(s->s3->client_random[SSL3_RANDOM_SIZE-i]),i);
494
495 if (s->s3 != NULL) ssl3_free(s);
496
497 if (!BUF_MEM_grow_clean(s->init_buf,
498 SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER))
499 {
500 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,ERR_R_BUF_LIB);
501 goto err;
502 }
503
504 s->state=SSL2_ST_GET_SERVER_HELLO_A;
505 if (!(s->client_version == SSL2_VERSION))
506 /* use special padding (SSL 3.0 draft/RFC 2246, App. E.2) */
507 s->s2->ssl2_rollback=1;
508
509 /* setup the 5 bytes we have read so we get them from
510 * the sslv2 buffer */
511 s->rstate=SSL_ST_READ_HEADER;
512 s->packet_length=n;
513 s->packet= &(s->s2->rbuf[0]);
514 memcpy(s->packet,buf,n);
515 s->s2->rbuf_left=n;
516 s->s2->rbuf_offs=0;
517
518 /* we have already written one */
519 s->s2->write_sequence=1;
520
521 s->method=SSLv2_client_method();
522 s->handshake_func=s->method->ssl_connect;
523#endif
524 }
525 else if ((p[0] == SSL3_RT_HANDSHAKE) &&
526 (p[1] == SSL3_VERSION_MAJOR) &&
527 ((p[2] == SSL3_VERSION_MINOR) ||
528 (p[2] == TLS1_VERSION_MINOR)) &&
529 (p[5] == SSL3_MT_SERVER_HELLO))
530 {
531 /* we have sslv3 or tls1 */
532
533 if (!ssl_init_wbio_buffer(s,1)) goto err;
534
535 /* we are in this state */
536 s->state=SSL3_ST_CR_SRVR_HELLO_A;
537
538 /* put the 5 bytes we have read into the input buffer
539 * for SSLv3 */
540 s->rstate=SSL_ST_READ_HEADER;
541 s->packet_length=n;
542 s->packet= &(s->s3->rbuf.buf[0]);
543 memcpy(s->packet,buf,n);
544 s->s3->rbuf.left=n;
545 s->s3->rbuf.offset=0;
546
547 if ((p[2] == SSL3_VERSION_MINOR) &&
548 !(s->options & SSL_OP_NO_SSLv3))
549 {
550#ifdef OPENSSL_FIPS
551 if(FIPS_mode())
552 {
553 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,
554 SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE);
555 goto err;
556 }
557#endif
558 s->version=SSL3_VERSION;
559 s->method=SSLv3_client_method();
560 }
561 else if ((p[2] == TLS1_VERSION_MINOR) &&
562 !(s->options & SSL_OP_NO_TLSv1))
563 {
564 s->version=TLS1_VERSION;
565 s->method=TLSv1_client_method();
566 }
567 else
568 {
569 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_PROTOCOL);
570 goto err;
571 }
572
573 s->handshake_func=s->method->ssl_connect;
574 }
575 else if ((p[0] == SSL3_RT_ALERT) &&
576 (p[1] == SSL3_VERSION_MAJOR) &&
577 ((p[2] == SSL3_VERSION_MINOR) ||
578 (p[2] == TLS1_VERSION_MINOR)) &&
579 (p[3] == 0) &&
580 (p[4] == 2))
581 {
582 void (*cb)(const SSL *ssl,int type,int val)=NULL;
583 int j;
584
585 /* An alert */
586 if (s->info_callback != NULL)
587 cb=s->info_callback;
588 else if (s->ctx->info_callback != NULL)
589 cb=s->ctx->info_callback;
590
591 i=p[5];
592 if (cb != NULL)
593 {
594 j=(i<<8)|p[6];
595 cb(s,SSL_CB_READ_ALERT,j);
596 }
597
598 s->rwstate=SSL_NOTHING;
599 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_AD_REASON_OFFSET+p[6]);
600 goto err;
601 }
602 else
603 {
604 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_R_UNKNOWN_PROTOCOL);
605 goto err;
606 }
607 s->init_num=0;
608
609 /* Since, if we are sending a ssl23 client hello, we are not
610 * reusing a session-id */
611 if (!ssl_get_new_session(s,0))
612 goto err;
613
614 return(SSL_connect(s));
615err:
616 return(-1);
617 }
618
| 387 *(p++)=0; /* Add the NULL method */
388#ifndef OPENSSL_NO_TLSEXT
389 if ((p = ssl_add_clienthello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH)) == NULL)
390 {
391 SSLerr(SSL_F_SSL23_CLIENT_HELLO,ERR_R_INTERNAL_ERROR);
392 return -1;
393 }
394#endif
395
396 l = p-d;
397 *p = 42;
398
399 /* fill in 4-byte handshake header */
400 d=&(buf[5]);
401 *(d++)=SSL3_MT_CLIENT_HELLO;
402 l2n3(l,d);
403
404 l += 4;
405
406 if (l > SSL3_RT_MAX_PLAIN_LENGTH)
407 {
408 SSLerr(SSL_F_SSL23_CLIENT_HELLO,ERR_R_INTERNAL_ERROR);
409 return -1;
410 }
411
412 /* fill in 5-byte record header */
413 d=buf;
414 *(d++) = SSL3_RT_HANDSHAKE;
415 *(d++) = version_major;
416 *(d++) = version_minor; /* arguably we should send the *lowest* suported version here
417 * (indicating, e.g., TLS 1.0 in "SSL 3.0 format") */
418 s2n((int)l,d);
419
420 /* number of bytes to write */
421 s->init_num=p-buf;
422 s->init_off=0;
423
424 ssl3_finish_mac(s,&(buf[5]), s->init_num - 5);
425 }
426
427 s->state=SSL23_ST_CW_CLNT_HELLO_B;
428 s->init_off=0;
429 }
430
431 /* SSL3_ST_CW_CLNT_HELLO_B */
432 ret = ssl23_write_bytes(s);
433
434 if ((ret >= 2) && s->msg_callback)
435 {
436 /* Client Hello has been sent; tell msg_callback */
437
438 if (ssl2_compat)
439 s->msg_callback(1, SSL2_VERSION, 0, s->init_buf->data+2, ret-2, s, s->msg_callback_arg);
440 else
441 s->msg_callback(1, version, SSL3_RT_HANDSHAKE, s->init_buf->data+5, ret-5, s, s->msg_callback_arg);
442 }
443
444 return ret;
445 }
446
447static int ssl23_get_server_hello(SSL *s)
448 {
449 char buf[8];
450 unsigned char *p;
451 int i;
452 int n;
453
454 n=ssl23_read_bytes(s,7);
455
456 if (n != 7) return(n);
457 p=s->packet;
458
459 memcpy(buf,p,n);
460
461 if ((p[0] & 0x80) && (p[2] == SSL2_MT_SERVER_HELLO) &&
462 (p[5] == 0x00) && (p[6] == 0x02))
463 {
464#ifdef OPENSSL_NO_SSL2
465 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_PROTOCOL);
466 goto err;
467#else
468 /* we are talking sslv2 */
469 /* we need to clean up the SSLv3 setup and put in the
470 * sslv2 stuff. */
471 int ch_len;
472
473 if (s->options & SSL_OP_NO_SSLv2)
474 {
475 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_PROTOCOL);
476 goto err;
477 }
478 if (s->s2 == NULL)
479 {
480 if (!ssl2_new(s))
481 goto err;
482 }
483 else
484 ssl2_clear(s);
485
486 if (s->options & SSL_OP_NETSCAPE_CHALLENGE_BUG)
487 ch_len=SSL2_CHALLENGE_LENGTH;
488 else
489 ch_len=SSL2_MAX_CHALLENGE_LENGTH;
490
491 /* write out sslv2 challenge */
492 i=(SSL3_RANDOM_SIZE < ch_len)
493 ?SSL3_RANDOM_SIZE:ch_len;
494 s->s2->challenge_length=i;
495 memcpy(s->s2->challenge,
496 &(s->s3->client_random[SSL3_RANDOM_SIZE-i]),i);
497
498 if (s->s3 != NULL) ssl3_free(s);
499
500 if (!BUF_MEM_grow_clean(s->init_buf,
501 SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER))
502 {
503 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,ERR_R_BUF_LIB);
504 goto err;
505 }
506
507 s->state=SSL2_ST_GET_SERVER_HELLO_A;
508 if (!(s->client_version == SSL2_VERSION))
509 /* use special padding (SSL 3.0 draft/RFC 2246, App. E.2) */
510 s->s2->ssl2_rollback=1;
511
512 /* setup the 5 bytes we have read so we get them from
513 * the sslv2 buffer */
514 s->rstate=SSL_ST_READ_HEADER;
515 s->packet_length=n;
516 s->packet= &(s->s2->rbuf[0]);
517 memcpy(s->packet,buf,n);
518 s->s2->rbuf_left=n;
519 s->s2->rbuf_offs=0;
520
521 /* we have already written one */
522 s->s2->write_sequence=1;
523
524 s->method=SSLv2_client_method();
525 s->handshake_func=s->method->ssl_connect;
526#endif
527 }
528 else if ((p[0] == SSL3_RT_HANDSHAKE) &&
529 (p[1] == SSL3_VERSION_MAJOR) &&
530 ((p[2] == SSL3_VERSION_MINOR) ||
531 (p[2] == TLS1_VERSION_MINOR)) &&
532 (p[5] == SSL3_MT_SERVER_HELLO))
533 {
534 /* we have sslv3 or tls1 */
535
536 if (!ssl_init_wbio_buffer(s,1)) goto err;
537
538 /* we are in this state */
539 s->state=SSL3_ST_CR_SRVR_HELLO_A;
540
541 /* put the 5 bytes we have read into the input buffer
542 * for SSLv3 */
543 s->rstate=SSL_ST_READ_HEADER;
544 s->packet_length=n;
545 s->packet= &(s->s3->rbuf.buf[0]);
546 memcpy(s->packet,buf,n);
547 s->s3->rbuf.left=n;
548 s->s3->rbuf.offset=0;
549
550 if ((p[2] == SSL3_VERSION_MINOR) &&
551 !(s->options & SSL_OP_NO_SSLv3))
552 {
553#ifdef OPENSSL_FIPS
554 if(FIPS_mode())
555 {
556 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,
557 SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE);
558 goto err;
559 }
560#endif
561 s->version=SSL3_VERSION;
562 s->method=SSLv3_client_method();
563 }
564 else if ((p[2] == TLS1_VERSION_MINOR) &&
565 !(s->options & SSL_OP_NO_TLSv1))
566 {
567 s->version=TLS1_VERSION;
568 s->method=TLSv1_client_method();
569 }
570 else
571 {
572 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_PROTOCOL);
573 goto err;
574 }
575
576 s->handshake_func=s->method->ssl_connect;
577 }
578 else if ((p[0] == SSL3_RT_ALERT) &&
579 (p[1] == SSL3_VERSION_MAJOR) &&
580 ((p[2] == SSL3_VERSION_MINOR) ||
581 (p[2] == TLS1_VERSION_MINOR)) &&
582 (p[3] == 0) &&
583 (p[4] == 2))
584 {
585 void (*cb)(const SSL *ssl,int type,int val)=NULL;
586 int j;
587
588 /* An alert */
589 if (s->info_callback != NULL)
590 cb=s->info_callback;
591 else if (s->ctx->info_callback != NULL)
592 cb=s->ctx->info_callback;
593
594 i=p[5];
595 if (cb != NULL)
596 {
597 j=(i<<8)|p[6];
598 cb(s,SSL_CB_READ_ALERT,j);
599 }
600
601 s->rwstate=SSL_NOTHING;
602 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_AD_REASON_OFFSET+p[6]);
603 goto err;
604 }
605 else
606 {
607 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_R_UNKNOWN_PROTOCOL);
608 goto err;
609 }
610 s->init_num=0;
611
612 /* Since, if we are sending a ssl23 client hello, we are not
613 * reusing a session-id */
614 if (!ssl_get_new_session(s,0))
615 goto err;
616
617 return(SSL_connect(s));
618err:
619 return(-1);
620 }
621
|