2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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.
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).
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.
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
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)"
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
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.]
62 #include <openssl/buffer.h>
63 #include <openssl/rand.h>
64 #include <openssl/objects.h>
65 #include <openssl/evp.h>
68 static SSL_METHOD *ssl23_get_client_method(int ver);
69 static int ssl23_client_hello(SSL *s);
70 static int ssl23_get_server_hello(SSL *s);
71 static SSL_METHOD *ssl23_get_client_method(int ver)
74 if (ver == SSL2_VERSION)
75 return(SSLv2_client_method());
77 if (ver == SSL3_VERSION)
78 return(SSLv3_client_method());
79 else if (ver == TLS1_VERSION)
80 return(TLSv1_client_method());
85 SSL_METHOD *SSLv23_client_method(void)
88 static SSL_METHOD SSLv23_client_data;
92 memcpy((char *)&SSLv23_client_data,
93 (char *)sslv23_base_method(),sizeof(SSL_METHOD));
94 SSLv23_client_data.ssl_connect=ssl23_connect;
95 SSLv23_client_data.get_ssl_method=ssl23_get_client_method;
98 return(&SSLv23_client_data);
101 int ssl23_connect(SSL *s)
104 unsigned long Time=time(NULL);
109 RAND_seed(&Time,sizeof(Time));
113 if (s->info_callback != NULL)
115 else if (s->ctx->info_callback != NULL)
116 cb=s->ctx->info_callback;
118 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
129 case SSL_ST_BEFORE|SSL_ST_CONNECT:
130 case SSL_ST_OK|SSL_ST_CONNECT:
132 if (s->session != NULL)
134 SSLerr(SSL_F_SSL23_CONNECT,SSL_R_SSL23_DOING_SESSION_ID_REUSE);
139 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
141 /* s->version=TLS1_VERSION; */
142 s->type=SSL_ST_CONNECT;
144 if (s->init_buf == NULL)
146 if ((buf=BUF_MEM_new()) == NULL)
151 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
159 if (!ssl3_setup_buffers(s)) { ret= -1; goto end; }
161 ssl3_init_finished_mac(s);
163 s->state=SSL23_ST_CW_CLNT_HELLO_A;
164 s->ctx->stats.sess_connect++;
168 case SSL23_ST_CW_CLNT_HELLO_A:
169 case SSL23_ST_CW_CLNT_HELLO_B:
172 ret=ssl23_client_hello(s);
173 if (ret <= 0) goto end;
174 s->state=SSL23_ST_CR_SRVR_HELLO_A;
179 case SSL23_ST_CR_SRVR_HELLO_A:
180 case SSL23_ST_CR_SRVR_HELLO_B:
181 ret=ssl23_get_server_hello(s);
182 if (ret >= 0) cb=NULL;
187 SSLerr(SSL_F_SSL23_CONNECT,SSL_R_UNKNOWN_STATE);
193 if (s->debug) { (void)BIO_flush(s->wbio); }
195 if ((cb != NULL) && (s->state != state))
199 cb(s,SSL_CB_CONNECT_LOOP,1);
206 cb(s,SSL_CB_CONNECT_EXIT,ret);
211 static int ssl23_client_hello(SSL *s)
217 buf=(unsigned char *)s->init_buf->data;
218 if (s->state == SSL23_ST_CW_CLNT_HELLO_A)
221 /* don't reuse session-id's */
222 if (!ssl_get_new_session(s,0))
228 p=s->s3->client_random;
229 RAND_bytes(p,SSL3_RANDOM_SIZE);
231 /* Do the message type and length last */
235 *(d++)=SSL2_MT_CLIENT_HELLO;
236 if (!(s->options & SSL_OP_NO_TLSv1))
238 *(d++)=TLS1_VERSION_MAJOR;
239 *(d++)=TLS1_VERSION_MINOR;
240 s->client_version=TLS1_VERSION;
242 else if (!(s->options & SSL_OP_NO_SSLv3))
244 *(d++)=SSL3_VERSION_MAJOR;
245 *(d++)=SSL3_VERSION_MINOR;
246 s->client_version=SSL3_VERSION;
248 else if (!(s->options & SSL_OP_NO_SSLv2))
250 *(d++)=SSL2_VERSION_MAJOR;
251 *(d++)=SSL2_VERSION_MINOR;
252 s->client_version=SSL2_VERSION;
256 SSLerr(SSL_F_SSL23_CLIENT_HELLO,SSL_R_NO_PROTOCOLS_AVAILABLE);
260 /* Ciphers supported */
261 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),p);
265 SSLerr(SSL_F_SSL23_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
271 /* put in the session-id, zero since there is no
274 s->session->session_id_length=0;
278 if (s->options & SSL_OP_NETSCAPE_CHALLENGE_BUG)
279 ch_len=SSL2_CHALLENGE_LENGTH;
281 ch_len=SSL2_MAX_CHALLENGE_LENGTH;
283 /* write out sslv2 challenge */
284 if (SSL3_RANDOM_SIZE < ch_len)
289 memset(&(s->s3->client_random[0]),0,SSL3_RANDOM_SIZE);
290 RAND_bytes(&(s->s3->client_random[SSL3_RANDOM_SIZE-i]),i);
291 memcpy(p,&(s->s3->client_random[SSL3_RANDOM_SIZE-i]),i);
295 buf[0]=((i>>8)&0xff)|0x80;
298 s->state=SSL23_ST_CW_CLNT_HELLO_B;
299 /* number of bytes to write */
303 ssl3_finish_mac(s,&(buf[2]),i);
306 /* SSL3_ST_CW_CLNT_HELLO_B */
307 return(ssl23_write_bytes(s));
310 static int ssl23_get_server_hello(SSL *s)
317 n=ssl23_read_bytes(s,7);
319 if (n != 7) return(n);
324 if ((p[0] & 0x80) && (p[2] == SSL2_MT_SERVER_HELLO) &&
325 (p[5] == 0x00) && (p[6] == 0x02))
328 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_PROTOCOL);
331 /* we are talking sslv2 */
332 /* we need to clean up the SSLv3 setup and put in the
335 if (s->options & SSL_OP_NO_SSLv2)
337 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_PROTOCOL);
348 if (s->options & SSL_OP_NETSCAPE_CHALLENGE_BUG)
349 ch_len=SSL2_CHALLENGE_LENGTH;
351 ch_len=SSL2_MAX_CHALLENGE_LENGTH;
353 /* write out sslv2 challenge */
354 i=(SSL3_RANDOM_SIZE < ch_len)
355 ?SSL3_RANDOM_SIZE:ch_len;
356 s->s2->challenge_length=i;
357 memcpy(s->s2->challenge,
358 &(s->s3->client_random[SSL3_RANDOM_SIZE-i]),i);
360 if (s->s3 != NULL) ssl3_free(s);
362 if (!BUF_MEM_grow(s->init_buf,
363 SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER))
365 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,ERR_R_BUF_LIB);
369 s->state=SSL2_ST_GET_SERVER_HELLO_A;
370 s->s2->ssl2_rollback=1;
372 /* setup the 5 bytes we have read so we get them from
373 * the sslv2 buffer */
374 s->rstate=SSL_ST_READ_HEADER;
376 s->packet= &(s->s2->rbuf[0]);
377 memcpy(s->packet,buf,n);
381 /* we have already written one */
382 s->s2->write_sequence=1;
384 s->method=SSLv2_client_method();
385 s->handshake_func=s->method->ssl_connect;
388 else if ((p[0] == SSL3_RT_HANDSHAKE) &&
389 (p[1] == SSL3_VERSION_MAJOR) &&
390 ((p[2] == SSL3_VERSION_MINOR) ||
391 (p[2] == TLS1_VERSION_MINOR)) &&
392 (p[5] == SSL3_MT_SERVER_HELLO))
394 /* we have sslv3 or tls1 */
396 if (!ssl_init_wbio_buffer(s,1)) goto err;
398 /* we are in this state */
399 s->state=SSL3_ST_CR_SRVR_HELLO_A;
401 /* put the 5 bytes we have read into the input buffer
403 s->rstate=SSL_ST_READ_HEADER;
405 s->packet= &(s->s3->rbuf.buf[0]);
406 memcpy(s->packet,buf,n);
408 s->s3->rbuf.offset=0;
410 if ((p[2] == SSL3_VERSION_MINOR) &&
411 !(s->options & SSL_OP_NO_SSLv3))
413 s->version=SSL3_VERSION;
414 s->method=SSLv3_client_method();
416 else if ((p[2] == TLS1_VERSION_MINOR) &&
417 !(s->options & SSL_OP_NO_TLSv1))
419 s->version=TLS1_VERSION;
420 s->method=TLSv1_client_method();
424 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_PROTOCOL);
428 s->handshake_func=s->method->ssl_connect;
430 else if ((p[0] == SSL3_RT_ALERT) &&
431 (p[1] == SSL3_VERSION_MAJOR) &&
432 ((p[2] == SSL3_VERSION_MINOR) ||
433 (p[2] == TLS1_VERSION_MINOR)) &&
441 if (s->info_callback != NULL)
443 else if (s->ctx->info_callback != NULL)
444 cb=s->ctx->info_callback;
450 cb(s,SSL_CB_READ_ALERT,j);
453 s->rwstate=SSL_NOTHING;
454 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_AD_REASON_OFFSET+p[6]);
459 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_R_UNKNOWN_PROTOCOL);
464 /* Since, if we are sending a ssl23 client hello, we are not
465 * reusing a session-id */
466 if (!ssl_get_new_session(s,0))
470 return(SSL_connect(s));