2 /* Copyright (C) 1995-1997 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.]
69 static int ssl23_client_hello(SSL *s);
70 static int ssl23_get_server_hello(SSL *s);
72 static int ssl23_client_hello();
73 static int ssl23_get_server_hello();
76 static SSL_METHOD *ssl23_get_client_method(ver)
80 return(SSLv2_client_method());
82 return(SSLv3_client_method());
87 SSL_METHOD *SSLv23_client_method()
90 static SSL_METHOD SSLv23_client_data;
95 memcpy((char *)&SSLv23_client_data,
96 (char *)sslv23_base_method(),sizeof(SSL_METHOD));
97 SSLv23_client_data.ssl_connect=ssl23_connect;
98 SSLv23_client_data.get_ssl_method=ssl23_get_client_method;
100 return(&SSLv23_client_data);
107 unsigned long Time=time(NULL);
112 RAND_seed((unsigned char *)&Time,sizeof(Time));
116 if (s->info_callback != NULL)
118 else if (s->ctx->info_callback != NULL)
119 cb=s->ctx->info_callback;
121 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
132 case SSL_ST_BEFORE|SSL_ST_CONNECT:
133 case SSL_ST_OK|SSL_ST_CONNECT:
135 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
138 s->type=SSL_ST_CONNECT;
140 if (s->init_buf == NULL)
142 if ((buf=BUF_MEM_new()) == NULL)
147 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
155 if (!ssl3_setup_buffers(s)) { ret= -1; goto end; }
157 ssl3_init_finished_mac(s);
159 s->state=SSL23_ST_CW_CLNT_HELLO_A;
160 s->ctx->sess_connect++;
164 case SSL23_ST_CW_CLNT_HELLO_A:
165 case SSL23_ST_CW_CLNT_HELLO_B:
168 ret=ssl23_client_hello(s);
169 if (ret <= 0) goto end;
170 s->state=SSL23_ST_CR_SRVR_HELLO_A;
175 case SSL23_ST_CR_SRVR_HELLO_A:
176 case SSL23_ST_CR_SRVR_HELLO_B:
177 ret=ssl23_get_server_hello(s);
178 if (ret >= 0) cb=NULL;
183 SSLerr(SSL_F_SSL23_CONNECT,SSL_R_UNKNOWN_STATE);
189 if (s->debug) BIO_flush(s->wbio);
191 if ((cb != NULL) && (s->state != state))
195 cb(s,SSL_CB_CONNECT_LOOP,1);
202 cb(s,SSL_CB_CONNECT_EXIT,ret);
207 static int ssl23_client_hello(s)
214 buf=(unsigned char *)s->init_buf->data;
215 if (s->state == SSL23_ST_CW_CLNT_HELLO_A)
218 /* don't reuse session-id's */
219 if (!ssl_get_new_session(s,0))
225 p=s->s3->client_random;
226 RAND_bytes(p,SSL3_RANDOM_SIZE);
228 /* Do the message type and length last */
232 *(d++)=SSL2_MT_CLIENT_HELLO;
233 *(d++)=SSL3_VERSION_MAJOR;
234 *(d++)=SSL3_VERSION_MINOR;
236 /* Ciphers supported */
237 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),p);
241 SSLerr(SSL_F_SSL23_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
247 /* put in the session-id, zero since there is no
250 s->session->session_id_length=0;
254 if (s->ctx->options & SSL_OP_NETSCAPE_CHALLENGE_BUG)
255 ch_len=SSL2_CHALLENGE_LENGTH;
257 ch_len=SSL2_MAX_CHALLENGE_LENGTH;
259 /* write out sslv2 challenge */
260 if (SSL3_RANDOM_SIZE < ch_len)
265 memset(&(s->s3->client_random[0]),0,SSL3_RANDOM_SIZE);
266 RAND_bytes(&(s->s3->client_random[SSL3_RANDOM_SIZE-i]),i);
267 memcpy(p,&(s->s3->client_random[SSL3_RANDOM_SIZE-i]),i);
271 buf[0]=((i>>8)&0xff)|0x80;
274 s->state=SSL23_ST_CW_CLNT_HELLO_B;
275 /* number of bytes to write */
279 ssl3_finish_mac(s,&(buf[2]),i);
282 /* SSL3_ST_CW_CLNT_HELLO_B */
283 return(ssl23_write_bytes(s));
286 static int ssl23_get_server_hello(s)
295 n=ssl23_read_bytes(s,7);
297 if (n != 7) return(n);
302 if ((p[0] & 0x80) && (p[2] == SSL2_MT_SERVER_HELLO) &&
303 (p[5] == 0x00) && (p[6] == 0x02))
305 /* we are talking sslv2 */
306 /* we need to clean up the SSLv3 setup and put in the
317 if (s->ctx->options & SSL_OP_NETSCAPE_CHALLENGE_BUG)
318 ch_len=SSL2_CHALLENGE_LENGTH;
320 ch_len=SSL2_MAX_CHALLENGE_LENGTH;
322 /* write out sslv2 challenge */
323 i=(SSL3_RANDOM_SIZE < ch_len)
324 ?SSL3_RANDOM_SIZE:ch_len;
325 s->s2->challenge_length=i;
326 memcpy(s->s2->challenge,
327 &(s->s3->client_random[SSL3_RANDOM_SIZE-i]),i);
329 if (s->s3 != NULL) ssl3_free(s);
331 if (!BUF_MEM_grow(s->init_buf,
332 SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER))
334 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,ERR_R_BUF_LIB);
338 s->state=SSL2_ST_GET_SERVER_HELLO_A;
339 s->s2->ssl2_rollback=1;
341 /* setup the 5 bytes we have read so we get them from
342 * the sslv2 buffer */
343 s->rstate=SSL_ST_READ_HEADER;
345 s->packet= &(s->s2->rbuf[0]);
346 memcpy(s->packet,buf,n);
350 /* we have already written one */
351 s->s2->write_sequence=1;
353 s->method=SSLv2_client_method();
354 s->handshake_func=s->method->ssl_connect;
356 else if ((p[0] == SSL3_RT_HANDSHAKE) &&
357 (p[1] == SSL3_VERSION_MAJOR) &&
358 (p[2] == SSL3_VERSION_MINOR) &&
359 (p[5] == SSL3_MT_SERVER_HELLO))
365 bbio=BIO_new(BIO_f_buffer());
368 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,ERR_R_BUF_LIB);
377 if (!BIO_set_write_buffer_size(bbio,16*1024))
379 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,ERR_R_BUF_LIB);
383 /* start the buffering */
384 s->wbio=BIO_push(s->bbio,s->wbio);
386 /* we are in this state */
387 s->state=SSL3_ST_CR_SRVR_HELLO_A;
389 /* put the 5 bytes we have read into the input buffer
391 s->rstate=SSL_ST_READ_HEADER;
393 s->packet= &(s->s3->rbuf.buf[0]);
394 memcpy(s->packet,buf,n);
396 s->s3->rbuf.offset=0;
398 s->method=SSLv3_client_method();
399 s->handshake_func=s->method->ssl_connect;
401 else if ((p[0] == SSL3_RT_ALERT) &&
402 (p[1] == SSL3_VERSION_MAJOR) &&
403 (p[2] == SSL3_VERSION_MINOR) &&
411 if (s->info_callback != NULL)
413 else if (s->ctx->info_callback != NULL)
414 cb=s->ctx->info_callback;
420 cb(s,SSL_CB_READ_ALERT,j);
423 s->rwstate=SSL_NOTHING;
424 SSLerr(SSL_F_SSL3_READ_BYTES,1000+p[6]);
429 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_R_UNKNOWN_PROTOCOL);
434 /* Since, if we are sending a ssl23 client hello, we are not
435 * reusing a session-id */
436 if (!ssl_get_new_session(s,0))
440 return(SSL_connect(s));