-/* ssl/s23_srvr.c */
-/* Copyright (C) 1995-1997 Eric Young (eay@cryptsoft.com)
- * All rights reserved.
- *
- * This package is an SSL implementation written
- * by Eric Young (eay@cryptsoft.com).
- * The implementation was written so as to conform with Netscapes SSL.
- *
- * This library is free for commercial and non-commercial use as long as
- * the following conditions are aheared to. The following conditions
- * apply to all code found in this distribution, be it the RC4, RSA,
- * lhash, DES, etc., code; not just the SSL code. The SSL documentation
- * included with this distribution is covered by the same copyright terms
- * except that the holder is Tim Hudson (tjh@cryptsoft.com).
- *
- * Copyright remains Eric Young's, and as such any Copyright notices in
- * the code are not to be removed.
- * If this package is used in a product, Eric Young should be given attribution
- * as the author of the parts of the library used.
- * This can be in the form of a textual message at program startup or
- * in documentation (online or textual) provided with the package.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * "This product includes cryptographic software written by
- * Eric Young (eay@cryptsoft.com)"
- * The word 'cryptographic' can be left out if the rouines from the library
- * being used are not cryptographic related :-).
- * 4. If you include any Windows specific code (or a derivative thereof) from
- * the apps directory (application code) you must include an acknowledgement:
- * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
- *
- * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- * The licence and distribution terms for any publically available version or
- * derivative of this code cannot be changed. i.e. this code cannot simply be
- * copied and put under another distribution licence
- * [including the GNU Public Licence.]
- */
-
-#include <stdio.h>
-#include "buffer.h"
-#include "rand.h"
-#include "objects.h"
-#include "evp.h"
-#include "ssl_locl.h"
-
-#define BREAK break
-
-#ifndef NOPROTO
-int ssl23_get_client_hello(SSL *s);
-#else
-int ssl23_get_client_hello();
-#endif
-
-static SSL_METHOD *ssl23_get_server_method(ver)
-int ver;
- {
- if (ver == 2)
- return(SSLv2_server_method());
- else if (ver == 3)
- return(SSLv3_server_method());
- else
- return(NULL);
- }
-
-SSL_METHOD *SSLv23_server_method()
- {
- static int init=1;
- static SSL_METHOD SSLv23_server_data;
-
- if (init)
- {
- init=0;
- memcpy((char *)&SSLv23_server_data,
- (char *)sslv23_base_method(),sizeof(SSL_METHOD));
- SSLv23_server_data.ssl_accept=ssl23_accept;
- SSLv23_server_data.get_ssl_method=ssl23_get_server_method;
- }
- return(&SSLv23_server_data);
- }
-
-int ssl23_accept(s)
-SSL *s;
- {
- BUF_MEM *buf;
- unsigned long Time=time(NULL);
- void (*cb)()=NULL;
- int ret= -1;
- int new_state,state;
-
- RAND_seed((unsigned char *)&Time,sizeof(Time));
- ERR_clear_error();
- errno=0;
-
- if (s->info_callback != NULL)
- cb=s->info_callback;
- else if (s->ctx->info_callback != NULL)
- cb=s->ctx->info_callback;
-
- if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
- s->in_handshake++;
-
- for (;;)
- {
- state=s->state;
-
- switch(s->state)
- {
- case SSL_ST_BEFORE:
- case SSL_ST_ACCEPT:
- case SSL_ST_BEFORE|SSL_ST_ACCEPT:
- case SSL_ST_OK|SSL_ST_ACCEPT:
-
- if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
-
- s->version=3;
- s->type=SSL_ST_ACCEPT;
-
- if (s->init_buf == NULL)
- {
- if ((buf=BUF_MEM_new()) == NULL)
- {
- ret= -1;
- goto end;
- }
- if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
- {
- ret= -1;
- goto end;
- }
- s->init_buf=buf;
- }
-
- ssl3_init_finished_mac(s);
-
- s->state=SSL23_ST_SR_CLNT_HELLO_A;
- s->ctx->sess_accept++;
- s->init_num=0;
- break;
-
- case SSL23_ST_SR_CLNT_HELLO_A:
- case SSL23_ST_SR_CLNT_HELLO_B:
-
- s->shutdown=0;
- ret=ssl23_get_client_hello(s);
- if (ret >= 0) cb=NULL;
- goto end;
- break;
-
- default:
- SSLerr(SSL_F_SSL23_ACCEPT,SSL_R_UNKNOWN_STATE);
- ret= -1;
- goto end;
- /* break; */
- }
-
- if ((cb != NULL) && (s->state != state))
- {
- new_state=s->state;
- s->state=state;
- cb(s,SSL_CB_ACCEPT_LOOP,1);
- s->state=new_state;
- }
- }
-end:
- if (cb != NULL)
- cb(s,SSL_CB_ACCEPT_EXIT,ret);
- s->in_handshake--;
- return(ret);
- }
-
-
-int ssl23_get_client_hello(s)
-SSL *s;
- {
- char buf[8];
- unsigned char *p,*d,*dd;
- unsigned int i;
- unsigned int csl,sil,cl;
- int n=0,j;
- BIO *bbio;
- int type=0;
-
- /* read the initial header */
- if (s->state == SSL23_ST_SR_CLNT_HELLO_A)
- {
- if (!ssl3_setup_buffers(s)) goto err;
-
- n=ssl23_read_bytes(s,7);
- if (n != 7) return(n);
-
- p=s->packet;
-
- memcpy(buf,p,n);
-
- if ((p[0] & 0x80) && (p[2] == SSL2_MT_CLIENT_HELLO))
- {
- /* SSLv2 header */
- if ((p[3] == 0x00) && (p[4] == 0x02))
- {
- /* SSLv2 */
- type=1;
- }
- else if ((p[3] == SSL3_VERSION_MAJOR) &&
- (p[4] == SSL3_VERSION_MINOR))
- {
- /* SSLv3 */
- s->state=SSL23_ST_SR_CLNT_HELLO_B;
- }
- }
- else if ((p[0] == SSL3_RT_HANDSHAKE) &&
- (p[1] == SSL3_VERSION_MAJOR) &&
- (p[2] == SSL3_VERSION_MINOR) &&
- (p[5] == SSL3_MT_CLIENT_HELLO))
- {
- /* true SSLv3 */
- type=3;
- }
- }
-
- if (s->state == SSL23_ST_SR_CLNT_HELLO_B)
- {
- /* we have a SSLv3 in a SSLv2 header */
- type=2;
- p=s->packet;
- n=((p[0]&0x7f)<<8)|p[1];
- if (n > (1024*4))
- {
- SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_RECORD_TOO_LARGE);
- goto err;
- }
-
- j=ssl23_read_bytes(s,n+2);
- if (j <= 0) return(j);
-
- ssl3_finish_mac(s,&(s->packet[2]),s->packet_length-2);
-
- p=s->packet;
- p+=5;
- n2s(p,csl);
- n2s(p,sil);
- n2s(p,cl);
- d=(unsigned char *)s->init_buf->data;
- if ((csl+sil+cl+11) != s->packet_length)
- {
- SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_RECORD_LENGTH_MISMATCH);
- goto err;
- }
-
- *(d++)=SSL3_VERSION_MAJOR;
- *(d++)=SSL3_VERSION_MINOR;
-
- /* lets populate the random area */
- /* get the chalenge_length */
- i=(cl > SSL3_RANDOM_SIZE)?SSL3_RANDOM_SIZE:cl;
- memset(d,0,SSL3_RANDOM_SIZE);
- memcpy(&(d[SSL3_RANDOM_SIZE-i]),&(p[csl+sil]),i);
- d+=SSL3_RANDOM_SIZE;
-
- /* no session-id reuse */
- *(d++)=0;
-
- /* ciphers */
- j=0;
- dd=d;
- d+=2;
- for (i=0; i<csl; i+=3)
- {
- if (p[i] != 0) continue;
- *(d++)=p[i+1];
- *(d++)=p[i+2];
- j+=2;
- }
- s2n(j,dd);
-
- /* compression */
- *(d++)=1;
- *(d++)=0;
-
- i=(d-(unsigned char *)s->init_buf->data);
-
- /* get the data reused from the init_buf */
- s->s3->tmp.reuse_message=1;
- s->s3->tmp.message_type=SSL3_MT_CLIENT_HELLO;
- s->s3->tmp.message_size=i;
- }
-
- if (type == 1)
- {
- /* we are talking sslv2 */
- /* we need to clean up the SSLv3 setup and put in the
- * sslv2 stuff. */
-
- if (s->s2 == NULL)
- {
- if (!ssl2_new(s))
- goto err;
- }
- else
- ssl2_clear(s);
-
- if (s->s3 != NULL) ssl3_free(s);
-
- if (!BUF_MEM_grow(s->init_buf,
- SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER))
- {
- goto err;
- }
-
- s->state=SSL2_ST_GET_CLIENT_HELLO_A;
- if (s->ctx->options & SSL_OP_MSIE_SSLV2_RSA_PADDING)
- s->s2->ssl2_rollback=0;
- else
- s->s2->ssl2_rollback=1;
-
- /* setup the 5 bytes we have read so we get them from
- * the sslv2 buffer */
- s->rstate=SSL_ST_READ_HEADER;
- s->packet_length=n;
- s->packet= &(s->s2->rbuf[0]);
- memcpy(s->packet,buf,n);
- s->s2->rbuf_left=n;
- s->s2->rbuf_offs=0;
-
- s->method=SSLv2_server_method();
- s->handshake_func=s->method->ssl_accept;
- }
-
- if ((type == 2) || (type == 3))
- {
- /* we have sslv3 */
-
- if (s->bbio == NULL)
- {
- bbio=BIO_new(BIO_f_buffer());
- if (bbio == NULL)
- goto err;
- s->bbio=bbio;
- }
- else
- bbio=s->bbio;
- BIO_reset(bbio);
- if (!BIO_set_write_buffer_size(bbio,16*1024))
- goto err;
- s->wbio=BIO_push(bbio,s->wbio);
-
- /* we are in this state */
- s->state=SSL3_ST_SR_CLNT_HELLO_A;
-
- if (type == 3)
- {
- /* put the 'n' bytes we have read into the input buffer
- * for SSLv3 */
- s->rstate=SSL_ST_READ_HEADER;
- s->packet_length=n;
- s->packet= &(s->s3->rbuf.buf[0]);
- memcpy(s->packet,buf,n);
- s->s3->rbuf.left=n;
- s->s3->rbuf.offset=0;
- }
- else
- {
- s->packet_length=0;
- s->s3->rbuf.left=0;
- s->s3->rbuf.offset=0;
- }
-
- s->method=SSLv3_server_method();
- s->handshake_func=s->method->ssl_accept;
- }
-
- if ((type < 1) || (type > 3))
- {
- /* bad, very bad */
- SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_UNKNOWN_PROTOCOL);
- goto err;
- }
- s->init_num=0;
- return(SSL_accept(s));
-err:
- return(-1);
- }
-
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