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
63 static int ssl23_num_ciphers(void );
64 static SSL_CIPHER *ssl23_get_cipher(unsigned int u);
65 static int ssl23_read(SSL *s, void *buf, int len);
66 static int ssl23_peek(SSL *s, void *buf, int len);
67 static int ssl23_write(SSL *s, const void *buf, int len);
68 static long ssl23_default_timeout(void );
69 static int ssl23_put_cipher_by_char(const SSL_CIPHER *c, unsigned char *p);
70 static SSL_CIPHER *ssl23_get_cipher_by_char(const unsigned char *p);
71 const char SSL23_version_str[]="SSLv2/3 compatibility" OPENSSL_VERSION_PTEXT;
72
73 static 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_const_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
ssl23_default_timeout(void)101 static long ssl23_default_timeout(void)
102 {
103 return(300);
104 }
105
sslv23_base_method(void)106 SSL_METHOD *sslv23_base_method(void)
107 {
108 return(&SSLv23_data);
109 }
110
ssl23_num_ciphers(void)111 static 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
ssl23_get_cipher(unsigned int u)120 static 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 */
ssl23_get_cipher_by_char(const unsigned char * p)136 static 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
ssl23_put_cipher_by_char(const SSL_CIPHER * c,unsigned char * p)154 static 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
ssl23_read(SSL * s,void * buf,int len)169 static 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
ssl23_peek(SSL * s,void * buf,int len)192 static 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
ssl23_write(SSL * s,const void * buf,int len)215 static 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