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.]
69 static SSL_METHOD *ssl23_get_server_method(int ver);
70 int ssl23_get_client_hello(SSL *s);
72 static SSL_METHOD *ssl23_get_server_method();
73 int ssl23_get_client_hello();
76 static SSL_METHOD *ssl23_get_server_method(ver)
79 if (ver == SSL2_VERSION)
80 return(SSLv2_server_method());
81 else if (ver == SSL3_VERSION)
82 return(SSLv3_server_method());
83 else if (ver == TLS1_VERSION)
84 return(TLSv1_server_method());
89 SSL_METHOD *SSLv23_server_method()
92 static SSL_METHOD SSLv23_server_data;
97 memcpy((char *)&SSLv23_server_data,
98 (char *)sslv23_base_method(),sizeof(SSL_METHOD));
99 SSLv23_server_data.ssl_accept=ssl23_accept;
100 SSLv23_server_data.get_ssl_method=ssl23_get_server_method;
102 return(&SSLv23_server_data);
109 unsigned long Time=time(NULL);
114 RAND_seed(&Time,sizeof(Time));
118 if (s->info_callback != NULL)
120 else if (s->ctx->info_callback != NULL)
121 cb=s->ctx->info_callback;
123 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
134 case SSL_ST_BEFORE|SSL_ST_ACCEPT:
135 case SSL_ST_OK|SSL_ST_ACCEPT:
137 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
139 /* s->version=SSL3_VERSION; */
140 s->type=SSL_ST_ACCEPT;
142 if (s->init_buf == NULL)
144 if ((buf=BUF_MEM_new()) == NULL)
149 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
157 ssl3_init_finished_mac(s);
159 s->state=SSL23_ST_SR_CLNT_HELLO_A;
160 s->ctx->sess_accept++;
164 case SSL23_ST_SR_CLNT_HELLO_A:
165 case SSL23_ST_SR_CLNT_HELLO_B:
168 ret=ssl23_get_client_hello(s);
169 if (ret >= 0) cb=NULL;
174 SSLerr(SSL_F_SSL23_ACCEPT,SSL_R_UNKNOWN_STATE);
180 if ((cb != NULL) && (s->state != state))
184 cb(s,SSL_CB_ACCEPT_LOOP,1);
190 cb(s,SSL_CB_ACCEPT_EXIT,ret);
196 int ssl23_get_client_hello(s)
200 char *buf= &(buf_space[0]);
201 unsigned char *p,*d,*dd;
203 unsigned int csl,sil,cl;
205 int type=0,use_sslv2_strong=0;
207 /* read the initial header */
208 if (s->state == SSL23_ST_SR_CLNT_HELLO_A)
210 if (!ssl3_setup_buffers(s)) goto err;
212 n=ssl23_read_bytes(s,7);
213 if (n != 7) return(n);
219 if ((p[0] & 0x80) && (p[2] == SSL2_MT_CLIENT_HELLO))
222 if ((p[3] == 0x00) && (p[4] == 0x02))
225 if (!(s->options & SSL_OP_NO_SSLv2))
228 else if (p[3] == SSL3_VERSION_MAJOR)
231 if (p[4] >= TLS1_VERSION_MINOR)
233 if (!(s->options & SSL_OP_NO_TLSv1))
236 s->state=SSL23_ST_SR_CLNT_HELLO_B;
238 else if (!(s->options & SSL_OP_NO_SSLv3))
240 s->state=SSL23_ST_SR_CLNT_HELLO_B;
242 else if (!(s->options & SSL_OP_NO_SSLv2))
247 else if (!(s->options & SSL_OP_NO_SSLv3))
248 s->state=SSL23_ST_SR_CLNT_HELLO_B;
249 else if (!(s->options & SSL_OP_NO_SSLv2))
252 if (s->options & SSL_OP_NON_EXPORT_FIRST)
258 j=((p[0]&0x7f)<<8)|p[1];
261 SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_RECORD_TOO_LARGE);
265 n=ssl23_read_bytes(s,j+2);
266 if (n <= 0) return(n);
269 if ((buf=Malloc(n)) == NULL)
271 SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,ERR_R_MALLOC_FAILURE);
280 sk=ssl_bytes_to_cipher_list(
285 for (j=0; j<sk_num(sk); j++)
287 c=(SSL_CIPHER *)sk_value(sk,j);
288 if (!(c->algorithms & SSL_EXP))
290 if ((c->id>>24L) == 2L)
306 else if ((p[0] == SSL3_RT_HANDSHAKE) &&
307 (p[1] == SSL3_VERSION_MAJOR) &&
308 (p[5] == SSL3_MT_CLIENT_HELLO))
310 /* true SSLv3 or tls1 */
311 if (p[2] >= TLS1_VERSION_MINOR)
313 if (!(s->options & SSL_OP_NO_TLSv1))
318 else if (!(s->options & SSL_OP_NO_SSLv3))
321 else if (!(s->options & SSL_OP_NO_SSLv3))
324 else if ((strncmp("GET ", (char *)p,4) == 0) ||
325 (strncmp("POST ",(char *)p,5) == 0) ||
326 (strncmp("HEAD ",(char *)p,5) == 0) ||
327 (strncmp("PUT ", (char *)p,4) == 0))
329 SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_HTTP_REQUEST);
332 else if (strncmp("CONNECT",(char *)p,7) == 0)
334 SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_HTTPS_PROXY_REQUEST);
340 if (s->state == SSL23_ST_SR_CLNT_HELLO_B)
342 /* we have a SSLv3/TLSv1 in a SSLv2 header */
345 n=((p[0]&0x7f)<<8)|p[1];
348 SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_RECORD_TOO_LARGE);
352 j=ssl23_read_bytes(s,n+2);
353 if (j <= 0) return(j);
355 ssl3_finish_mac(s,&(s->packet[2]),s->packet_length-2);
362 d=(unsigned char *)s->init_buf->data;
363 if ((csl+sil+cl+11) != s->packet_length)
365 SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_RECORD_LENGTH_MISMATCH);
369 *(d++)=SSL3_VERSION_MAJOR;
371 *(d++)=TLS1_VERSION_MINOR;
373 *(d++)=SSL3_VERSION_MINOR;
375 /* lets populate the random area */
376 /* get the chalenge_length */
377 i=(cl > SSL3_RANDOM_SIZE)?SSL3_RANDOM_SIZE:cl;
378 memset(d,0,SSL3_RANDOM_SIZE);
379 memcpy(&(d[SSL3_RANDOM_SIZE-i]),&(p[csl+sil]),i);
382 /* no session-id reuse */
389 for (i=0; i<csl; i+=3)
391 if (p[i] != 0) continue;
402 i=(d-(unsigned char *)s->init_buf->data);
404 /* get the data reused from the init_buf */
405 s->s3->tmp.reuse_message=1;
406 s->s3->tmp.message_type=SSL3_MT_CLIENT_HELLO;
407 s->s3->tmp.message_size=i;
412 /* we are talking sslv2 */
413 /* we need to clean up the SSLv3/TLSv1 setup and put in the
424 if (s->s3 != NULL) ssl3_free(s);
426 if (!BUF_MEM_grow(s->init_buf,
427 SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER))
432 s->state=SSL2_ST_GET_CLIENT_HELLO_A;
433 if ((s->options & SSL_OP_MSIE_SSLV2_RSA_PADDING) ||
435 s->s2->ssl2_rollback=0;
437 s->s2->ssl2_rollback=1;
439 /* setup the 5 bytes we have read so we get them from
440 * the sslv2 buffer */
441 s->rstate=SSL_ST_READ_HEADER;
443 s->packet= &(s->s2->rbuf[0]);
444 memcpy(s->packet,buf,n);
448 s->method=SSLv2_server_method();
449 s->handshake_func=s->method->ssl_accept;
452 if ((type == 2) || (type == 3))
454 /* we have SSLv3/TLSv1 */
456 if (!ssl_init_wbio_buffer(s,1)) goto err;
458 /* we are in this state */
459 s->state=SSL3_ST_SR_CLNT_HELLO_A;
463 /* put the 'n' bytes we have read into the input buffer
465 s->rstate=SSL_ST_READ_HEADER;
467 s->packet= &(s->s3->rbuf.buf[0]);
468 memcpy(s->packet,buf,n);
470 s->s3->rbuf.offset=0;
476 s->s3->rbuf.offset=0;
481 s->version=TLS1_VERSION;
482 s->method=TLSv1_server_method();
486 s->version=SSL3_VERSION;
487 s->method=SSLv3_server_method();
489 s->handshake_func=s->method->ssl_accept;
492 if ((type < 1) || (type > 3))
495 SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_UNKNOWN_PROTOCOL);
500 if (buf != buf_space) Free(buf);
502 return(SSL_accept(s));
504 if (buf != buf_space) Free(buf);