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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_write(SSL *s, const void *buf, int len);
67static long ssl23_default_timeout(void );
68static int ssl23_put_cipher_by_char(const SSL_CIPHER *c, unsigned char *p);
69static SSL_CIPHER *ssl23_get_cipher_by_char(const unsigned char *p);
70char *SSL23_version_str="SSLv2/3 compatibility" OPENSSL_VERSION_PTEXT;
71
72static SSL_METHOD SSLv23_data= {
73 TLS1_VERSION,
74 tls1_new,
75 tls1_clear,
76 tls1_free,
77 ssl_undefined_function,
78 ssl_undefined_function,
79 ssl23_read,
80 (int (*)(struct ssl_st *, char *, int))ssl_undefined_function,
81 ssl23_write,
82 ssl_undefined_function,
83 ssl_undefined_function,
84 ssl_ok,
85 ssl3_ctrl,
86 ssl3_ctx_ctrl,
87 ssl23_get_cipher_by_char,
88 ssl23_put_cipher_by_char,
89 ssl_undefined_function,
90 ssl23_num_ciphers,
91 ssl23_get_cipher,
92 ssl_bad_method,
93 ssl23_default_timeout,
94 &ssl3_undef_enc_method,
95 };
96
97static long ssl23_default_timeout(void)
98 {
99 return(300);
100 }
101
102SSL_METHOD *sslv23_base_method(void)
103 {
104 return(&SSLv23_data);
105 }
106
107static int ssl23_num_ciphers(void)
108 {
109 return(ssl3_num_ciphers()+ssl2_num_ciphers());
110 }
111
112static SSL_CIPHER *ssl23_get_cipher(unsigned int u)
113 {
114 unsigned int uu=ssl3_num_ciphers();
115
116 if (u < uu)
117 return(ssl3_get_cipher(u));
118 else
119 return(ssl2_get_cipher(u-uu));
120 }
121
122/* This function needs to check if the ciphers required are actually
123 * available */
124static SSL_CIPHER *ssl23_get_cipher_by_char(const unsigned char *p)
125 {
126 SSL_CIPHER c,*cp;
127 unsigned long id;
128 int n;
129
130 n=ssl3_num_ciphers();
131 id=0x03000000|((unsigned long)p[0]<<16L)|
132 ((unsigned long)p[1]<<8L)|(unsigned long)p[2];
133 c.id=id;
134 cp=ssl3_get_cipher_by_char(p);
135 if (cp == NULL)
136 cp=ssl2_get_cipher_by_char(p);
137 return(cp);
138 }
139
140static int ssl23_put_cipher_by_char(const SSL_CIPHER *c, unsigned char *p)
141 {
142 long l;
143
144 /* We can write SSLv2 and SSLv3 ciphers */
145 if (p != NULL)
146 {
147 l=c->id;
148 p[0]=((unsigned char)(l>>16L))&0xFF;
149 p[1]=((unsigned char)(l>> 8L))&0xFF;
150 p[2]=((unsigned char)(l ))&0xFF;
151 }
152 return(3);
153 }
154
155static int ssl23_read(SSL *s, void *buf, int len)
156 {
157 int n;
158
159#if 0
160 if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
161 {
162 s->rwstate=SSL_NOTHING;
163 return(0);
164 }
165#endif
166 clear_sys_error();
167 if (SSL_in_init(s) && (!s->in_handshake))
168 {
169 n=s->handshake_func(s);
170 if (n < 0) return(n);
171 if (n == 0)
172 {
173 SSLerr(SSL_F_SSL23_READ,SSL_R_SSL_HANDSHAKE_FAILURE);
174 return(-1);
175 }
176 return(SSL_read(s,buf,len));
177 }
178 else
179 {
180 ssl_undefined_function(s);
181 return(-1);
182 }
183 }
184
185static int ssl23_write(SSL *s, const void *buf, int len)
186 {
187 int n;
188
189#if 0
190 if (s->shutdown & SSL_SENT_SHUTDOWN)
191 {
192 s->rwstate=SSL_NOTHING;
193 return(0);
194 }
195#endif
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_WRITE,SSL_R_SSL_HANDSHAKE_FAILURE);
204 return(-1);
205 }
206 return(SSL_write(s,buf,len));
207 }
208 else
209 {
210 ssl_undefined_function(s);
211 return(-1);
212 }
213 }
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