s23_lib.c revision 55949
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 * $FreeBSD: head/crypto/openssl/ssl/s23_lib.c 55949 2000-01-14 05:24:08Z kris $ 59 */ 60 61#include <stdio.h> 62#include <openssl/objects.h> 63#include "ssl_locl.h" 64 65static int ssl23_num_ciphers(void ); 66static SSL_CIPHER *ssl23_get_cipher(unsigned int u); 67static int ssl23_read(SSL *s, void *buf, int len); 68static int ssl23_write(SSL *s, const void *buf, int len); 69static long ssl23_default_timeout(void ); 70static int ssl23_put_cipher_by_char(const SSL_CIPHER *c, unsigned char *p); 71static SSL_CIPHER *ssl23_get_cipher_by_char(const unsigned char *p); 72char *SSL23_version_str="SSLv2/3 compatibility" OPENSSL_VERSION_PTEXT; 73 74static SSL_METHOD SSLv23_data= { 75 TLS1_VERSION, 76 tls1_new, 77 tls1_clear, 78 tls1_free, 79 ssl_undefined_function, 80 ssl_undefined_function, 81 ssl23_read, 82 (int (*)(struct ssl_st *, char *, int))ssl_undefined_function, 83 ssl23_write, 84 ssl_undefined_function, 85 ssl_undefined_function, 86 ssl_ok, 87 ssl3_ctrl, 88 ssl3_ctx_ctrl, 89 ssl23_get_cipher_by_char, 90 ssl23_put_cipher_by_char, 91 ssl_undefined_function, 92 ssl23_num_ciphers, 93 ssl23_get_cipher, 94 ssl_bad_method, 95 ssl23_default_timeout, 96 &ssl3_undef_enc_method, 97 }; 98 99static long ssl23_default_timeout(void) 100 { 101 return(300); 102 } 103 104SSL_METHOD *sslv23_base_method(void) 105 { 106 return(&SSLv23_data); 107 } 108 109static int ssl23_num_ciphers(void) 110 { 111 return(ssl3_num_ciphers() 112#ifndef NO_SSL2 113 +ssl2_num_ciphers() 114#endif 115 ); 116 } 117 118static SSL_CIPHER *ssl23_get_cipher(unsigned int u) 119 { 120 unsigned int uu=ssl3_num_ciphers(); 121 122 if (u < uu) 123 return(ssl3_get_cipher(u)); 124 else 125#ifndef NO_SSL2 126 return(ssl2_get_cipher(u-uu)); 127#else 128 return(NULL); 129#endif 130 } 131 132/* This function needs to check if the ciphers required are actually 133 * available */ 134static SSL_CIPHER *ssl23_get_cipher_by_char(const unsigned char *p) 135 { 136 SSL_CIPHER c,*cp; 137 unsigned long id; 138 int n; 139 140 n=ssl3_num_ciphers(); 141 id=0x03000000|((unsigned long)p[0]<<16L)| 142 ((unsigned long)p[1]<<8L)|(unsigned long)p[2]; 143 c.id=id; 144 cp=ssl3_get_cipher_by_char(p); 145#ifndef NO_SSL2 146 if (cp == NULL) 147 cp=ssl2_get_cipher_by_char(p); 148#endif 149 return(cp); 150 } 151 152static int ssl23_put_cipher_by_char(const SSL_CIPHER *c, unsigned char *p) 153 { 154 long l; 155 156 /* We can write SSLv2 and SSLv3 ciphers */ 157 if (p != NULL) 158 { 159 l=c->id; 160 p[0]=((unsigned char)(l>>16L))&0xFF; 161 p[1]=((unsigned char)(l>> 8L))&0xFF; 162 p[2]=((unsigned char)(l ))&0xFF; 163 } 164 return(3); 165 } 166 167static int ssl23_read(SSL *s, void *buf, int len) 168 { 169 int n; 170 171#if 0 172 if (s->shutdown & SSL_RECEIVED_SHUTDOWN) 173 { 174 s->rwstate=SSL_NOTHING; 175 return(0); 176 } 177#endif 178 clear_sys_error(); 179 if (SSL_in_init(s) && (!s->in_handshake)) 180 { 181 n=s->handshake_func(s); 182 if (n < 0) return(n); 183 if (n == 0) 184 { 185 SSLerr(SSL_F_SSL23_READ,SSL_R_SSL_HANDSHAKE_FAILURE); 186 return(-1); 187 } 188 return(SSL_read(s,buf,len)); 189 } 190 else 191 { 192 ssl_undefined_function(s); 193 return(-1); 194 } 195 } 196 197static int ssl23_write(SSL *s, const void *buf, int len) 198 { 199 int n; 200 201#if 0 202 if (s->shutdown & SSL_SENT_SHUTDOWN) 203 { 204 s->rwstate=SSL_NOTHING; 205 return(0); 206 } 207#endif 208 clear_sys_error(); 209 if (SSL_in_init(s) && (!s->in_handshake)) 210 { 211 n=s->handshake_func(s); 212 if (n < 0) return(n); 213 if (n == 0) 214 { 215 SSLerr(SSL_F_SSL23_WRITE,SSL_R_SSL_HANDSHAKE_FAILURE); 216 return(-1); 217 } 218 return(SSL_write(s,buf,len)); 219 } 220 else 221 { 222 ssl_undefined_function(s); 223 return(-1); 224 } 225 } 226