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 int ssl23_get_client_hello(SSL *s);
71 int ssl23_get_client_hello();
74 static SSL_METHOD *ssl23_get_server_method(ver)
78 return(SSLv2_server_method());
80 return(SSLv3_server_method());
85 SSL_METHOD *SSLv23_server_method()
88 static SSL_METHOD SSLv23_server_data;
93 memcpy((char *)&SSLv23_server_data,
94 (char *)sslv23_base_method(),sizeof(SSL_METHOD));
95 SSLv23_server_data.ssl_accept=ssl23_accept;
96 SSLv23_server_data.get_ssl_method=ssl23_get_server_method;
98 return(&SSLv23_server_data);
105 unsigned long Time=time(NULL);
110 RAND_seed((unsigned char *)&Time,sizeof(Time));
114 if (s->info_callback != NULL)
116 else if (s->ctx->info_callback != NULL)
117 cb=s->ctx->info_callback;
119 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
130 case SSL_ST_BEFORE|SSL_ST_ACCEPT:
131 case SSL_ST_OK|SSL_ST_ACCEPT:
133 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
136 s->type=SSL_ST_ACCEPT;
138 if (s->init_buf == NULL)
140 if ((buf=BUF_MEM_new()) == NULL)
145 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
153 ssl3_init_finished_mac(s);
155 s->state=SSL23_ST_SR_CLNT_HELLO_A;
156 s->ctx->sess_accept++;
160 case SSL23_ST_SR_CLNT_HELLO_A:
161 case SSL23_ST_SR_CLNT_HELLO_B:
164 ret=ssl23_get_client_hello(s);
165 if (ret >= 0) cb=NULL;
170 SSLerr(SSL_F_SSL23_ACCEPT,SSL_R_UNKNOWN_STATE);
176 if ((cb != NULL) && (s->state != state))
180 cb(s,SSL_CB_ACCEPT_LOOP,1);
186 cb(s,SSL_CB_ACCEPT_EXIT,ret);
192 int ssl23_get_client_hello(s)
196 unsigned char *p,*d,*dd;
198 unsigned int csl,sil,cl;
203 /* read the initial header */
204 if (s->state == SSL23_ST_SR_CLNT_HELLO_A)
206 if (!ssl3_setup_buffers(s)) goto err;
208 n=ssl23_read_bytes(s,7);
209 if (n != 7) return(n);
215 if ((p[0] & 0x80) && (p[2] == SSL2_MT_CLIENT_HELLO))
218 if ((p[3] == 0x00) && (p[4] == 0x02))
223 else if ((p[3] == SSL3_VERSION_MAJOR) &&
224 (p[4] == SSL3_VERSION_MINOR))
227 s->state=SSL23_ST_SR_CLNT_HELLO_B;
230 else if ((p[0] == SSL3_RT_HANDSHAKE) &&
231 (p[1] == SSL3_VERSION_MAJOR) &&
232 (p[2] == SSL3_VERSION_MINOR) &&
233 (p[5] == SSL3_MT_CLIENT_HELLO))
240 if (s->state == SSL23_ST_SR_CLNT_HELLO_B)
242 /* we have a SSLv3 in a SSLv2 header */
245 n=((p[0]&0x7f)<<8)|p[1];
248 SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_RECORD_TOO_LARGE);
252 j=ssl23_read_bytes(s,n+2);
253 if (j <= 0) return(j);
255 ssl3_finish_mac(s,&(s->packet[2]),s->packet_length-2);
262 d=(unsigned char *)s->init_buf->data;
263 if ((csl+sil+cl+11) != s->packet_length)
265 SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_RECORD_LENGTH_MISMATCH);
269 *(d++)=SSL3_VERSION_MAJOR;
270 *(d++)=SSL3_VERSION_MINOR;
272 /* lets populate the random area */
273 /* get the chalenge_length */
274 i=(cl > SSL3_RANDOM_SIZE)?SSL3_RANDOM_SIZE:cl;
275 memset(d,0,SSL3_RANDOM_SIZE);
276 memcpy(&(d[SSL3_RANDOM_SIZE-i]),&(p[csl+sil]),i);
279 /* no session-id reuse */
286 for (i=0; i<csl; i+=3)
288 if (p[i] != 0) continue;
299 i=(d-(unsigned char *)s->init_buf->data);
301 /* get the data reused from the init_buf */
302 s->s3->tmp.reuse_message=1;
303 s->s3->tmp.message_type=SSL3_MT_CLIENT_HELLO;
304 s->s3->tmp.message_size=i;
309 /* we are talking sslv2 */
310 /* we need to clean up the SSLv3 setup and put in the
321 if (s->s3 != NULL) ssl3_free(s);
323 if (!BUF_MEM_grow(s->init_buf,
324 SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER))
329 s->state=SSL2_ST_GET_CLIENT_HELLO_A;
330 if (s->ctx->options & SSL_OP_MSIE_SSLV2_RSA_PADDING)
331 s->s2->ssl2_rollback=0;
333 s->s2->ssl2_rollback=1;
335 /* setup the 5 bytes we have read so we get them from
336 * the sslv2 buffer */
337 s->rstate=SSL_ST_READ_HEADER;
339 s->packet= &(s->s2->rbuf[0]);
340 memcpy(s->packet,buf,n);
344 s->method=SSLv2_server_method();
345 s->handshake_func=s->method->ssl_accept;
348 if ((type == 2) || (type == 3))
354 bbio=BIO_new(BIO_f_buffer());
362 if (!BIO_set_write_buffer_size(bbio,16*1024))
364 s->wbio=BIO_push(bbio,s->wbio);
366 /* we are in this state */
367 s->state=SSL3_ST_SR_CLNT_HELLO_A;
371 /* put the 'n' bytes we have read into the input buffer
373 s->rstate=SSL_ST_READ_HEADER;
375 s->packet= &(s->s3->rbuf.buf[0]);
376 memcpy(s->packet,buf,n);
378 s->s3->rbuf.offset=0;
384 s->s3->rbuf.offset=0;
387 s->method=SSLv3_server_method();
388 s->handshake_func=s->method->ssl_accept;
391 if ((type < 1) || (type > 3))
394 SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_UNKNOWN_PROTOCOL);
398 return(SSL_accept(s));