1/* ssl/s23_lib.c */
2/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3 * All rights reserved.
4 *
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.
8 *
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).
15 *
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.
22 *
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
25 * are met:
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)"
40 *
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
51 * SUCH DAMAGE.
52 *
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.]
57 */
58
59#include <stdio.h>
60#include <openssl/objects.h>
61#include "ssl_locl.h"
62
63static int ssl23_num_ciphers(void );
64static SSL_CIPHER *ssl23_get_cipher(unsigned int u);
65static int ssl23_read(SSL *s, void *buf, int len);
66static int ssl23_peek(SSL *s, void *buf, int len);
67static int ssl23_write(SSL *s, const void *buf, int len);
68static long ssl23_default_timeout(void );
69static int ssl23_put_cipher_by_char(const SSL_CIPHER *c, unsigned char *p);
70static SSL_CIPHER *ssl23_get_cipher_by_char(const unsigned char *p);
71const char *SSL23_version_str="SSLv2/3 compatibility" OPENSSL_VERSION_PTEXT;
72
73static SSL_METHOD SSLv23_data= {
74	TLS1_VERSION,
75	tls1_new,
76	tls1_clear,
77	tls1_free,
78	ssl_undefined_function,
79	ssl_undefined_function,
80	ssl23_read,
81	ssl23_peek,
82	ssl23_write,
83	ssl_undefined_function,
84	ssl_undefined_function,
85	ssl_ok,
86	ssl3_ctrl,
87	ssl3_ctx_ctrl,
88	ssl23_get_cipher_by_char,
89	ssl23_put_cipher_by_char,
90	ssl_undefined_function,
91	ssl23_num_ciphers,
92	ssl23_get_cipher,
93	ssl_bad_method,
94	ssl23_default_timeout,
95	&ssl3_undef_enc_method,
96	ssl_undefined_function,
97	ssl3_callback_ctrl,
98	ssl3_ctx_callback_ctrl,
99	};
100
101static long ssl23_default_timeout(void)
102	{
103	return(300);
104	}
105
106SSL_METHOD *sslv23_base_method(void)
107	{
108	return(&SSLv23_data);
109	}
110
111static int ssl23_num_ciphers(void)
112	{
113	return(ssl3_num_ciphers()
114#ifndef OPENSSL_NO_SSL2
115	       + ssl2_num_ciphers()
116#endif
117	    );
118	}
119
120static SSL_CIPHER *ssl23_get_cipher(unsigned int u)
121	{
122	unsigned int uu=ssl3_num_ciphers();
123
124	if (u < uu)
125		return(ssl3_get_cipher(u));
126	else
127#ifndef OPENSSL_NO_SSL2
128		return(ssl2_get_cipher(u-uu));
129#else
130		return(NULL);
131#endif
132	}
133
134/* This function needs to check if the ciphers required are actually
135 * available */
136static SSL_CIPHER *ssl23_get_cipher_by_char(const unsigned char *p)
137	{
138	SSL_CIPHER c,*cp;
139	unsigned long id;
140	int n;
141
142	n=ssl3_num_ciphers();
143	id=0x03000000|((unsigned long)p[0]<<16L)|
144		((unsigned long)p[1]<<8L)|(unsigned long)p[2];
145	c.id=id;
146	cp=ssl3_get_cipher_by_char(p);
147#ifndef OPENSSL_NO_SSL2
148	if (cp == NULL)
149		cp=ssl2_get_cipher_by_char(p);
150#endif
151	return(cp);
152	}
153
154static int ssl23_put_cipher_by_char(const SSL_CIPHER *c, unsigned char *p)
155	{
156	long l;
157
158	/* We can write SSLv2 and SSLv3 ciphers */
159	if (p != NULL)
160		{
161		l=c->id;
162		p[0]=((unsigned char)(l>>16L))&0xFF;
163		p[1]=((unsigned char)(l>> 8L))&0xFF;
164		p[2]=((unsigned char)(l     ))&0xFF;
165		}
166	return(3);
167	}
168
169static int ssl23_read(SSL *s, void *buf, int len)
170	{
171	int n;
172
173	clear_sys_error();
174	if (SSL_in_init(s) && (!s->in_handshake))
175		{
176		n=s->handshake_func(s);
177		if (n < 0) return(n);
178		if (n == 0)
179			{
180			SSLerr(SSL_F_SSL23_READ,SSL_R_SSL_HANDSHAKE_FAILURE);
181			return(-1);
182			}
183		return(SSL_read(s,buf,len));
184		}
185	else
186		{
187		ssl_undefined_function(s);
188		return(-1);
189		}
190	}
191
192static int ssl23_peek(SSL *s, void *buf, int len)
193	{
194	int n;
195
196	clear_sys_error();
197	if (SSL_in_init(s) && (!s->in_handshake))
198		{
199		n=s->handshake_func(s);
200		if (n < 0) return(n);
201		if (n == 0)
202			{
203			SSLerr(SSL_F_SSL23_PEEK,SSL_R_SSL_HANDSHAKE_FAILURE);
204			return(-1);
205			}
206		return(SSL_peek(s,buf,len));
207		}
208	else
209		{
210		ssl_undefined_function(s);
211		return(-1);
212		}
213	}
214
215static int ssl23_write(SSL *s, const void *buf, int len)
216	{
217	int n;
218
219	clear_sys_error();
220	if (SSL_in_init(s) && (!s->in_handshake))
221		{
222		n=s->handshake_func(s);
223		if (n < 0) return(n);
224		if (n == 0)
225			{
226			SSLerr(SSL_F_SSL23_WRITE,SSL_R_SSL_HANDSHAKE_FAILURE);
227			return(-1);
228			}
229		return(SSL_write(s,buf,len));
230		}
231	else
232		{
233		ssl_undefined_function(s);
234		return(-1);
235		}
236	}
237