ssl/s23_lib.c

   1 /* ssl/s23_lib.c */
   2 /* Copyright (C) 1995-1997 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 "objects.h"
  61 #include "ssl_locl.h"
  62
  63 #ifndef NOPROTO
  64 static int ssl23_num_ciphers(void );
  65 static SSL_CIPHER *ssl23_get_cipher(unsigned int u);
  66 static int ssl23_read(SSL *s, char *buf, int len);
  67 static int ssl23_write(SSL *s, char *buf, int len);
  68 static long ssl23_default_timeout(void );
  69 static int ssl23_put_cipher_by_char(SSL_CIPHER *c, unsigned char *p);
  70 static SSL_CIPHER *ssl23_get_cipher_by_char(unsigned char *p);
  71 #else
  72 static int ssl23_num_ciphers();
  73 static SSL_CIPHER *ssl23_get_cipher();
  74 static int ssl23_read();
  75 static int ssl23_write();
  76 static long ssl23_default_timeout();
  77 static int ssl23_put_cipher_by_char();
  78 static SSL_CIPHER *ssl23_get_cipher_by_char();
  79 #endif
  80
  81 char *SSL23_version_str="SSLv2/3 compatablity part of SSLeay 0.7.0 30-Jan-1997";
  82
  83 static SSL_METHOD SSLv23_data= {
  84         3,
  85         ssl3_new,
  86         ssl3_clear,
  87         ssl3_free,
  88         ssl_undefined_function,
  89         ssl_undefined_function,
  90         ssl23_read,
  91         ssl_undefined_function,
  92         ssl23_write,
  93         ssl_undefined_function,
  94         ssl_undefined_function,
  95         ssl3_ctrl,
  96         ssl3_ctx_ctrl,
  97         ssl23_get_cipher_by_char,
  98         ssl23_put_cipher_by_char,
  99         ssl_undefined_function,
 100         ssl23_num_ciphers,
 101         ssl23_get_cipher,
 102         ssl_bad_method,
 103         ssl23_default_timeout,
 104         };
 105
 106 static long ssl23_default_timeout()
 107         {
 108         return(300);
 109         }
 110
 111 SSL_METHOD *sslv23_base_method()
 112         {
 113         return(&SSLv23_data);
 114         }
 115
 116 static int ssl23_num_ciphers()
 117         {
 118         return(ssl3_num_ciphers()+ssl2_num_ciphers());
 119         }
 120
 121 static SSL_CIPHER *ssl23_get_cipher(u)
 122 unsigned int u;
 123         {
 124         unsigned int uu=ssl3_num_ciphers();
 125
 126         if (u < uu)
 127                 return(ssl3_get_cipher(u));
 128         else
 129                 return(ssl2_get_cipher(u-uu));
 130         }
 131
 132 /* This function needs to check if the ciphers required are actually
 133  * available */
 134 static SSL_CIPHER *ssl23_get_cipher_by_char(p)
 135 unsigned char *p;
 136         {
 137         SSL_CIPHER c,*cp;
 138         unsigned long id;
 139         int n;
 140
 141         n=ssl3_num_ciphers();
 142         id=0x03000000|((unsigned long)p[0]<<16L)|
 143                 ((unsigned long)p[1]<<8L)|(unsigned long)p[2];
 144         c.id=id;
 145         cp=ssl3_get_cipher_by_char(p);
 146         if (cp == NULL)
 147                 cp=ssl2_get_cipher_by_char(p);
 148         return(cp);
 149         }
 150
 151 static int ssl23_put_cipher_by_char(c,p)
 152 SSL_CIPHER *c;
 153 unsigned char *p;
 154         {
 155         long l;
 156
 157         /* We can write SSLv2 and SSLv3 ciphers */
 158         if (p != NULL)
 159                 {
 160                 l=c->id;
 161                 p[0]=((unsigned char)(l>>16L))&0xFF;
 162                 p[1]=((unsigned char)(l>> 8L))&0xFF;
 163                 p[2]=((unsigned char)(l     ))&0xFF;
 164                 }
 165         return(3);
 166         }
 167
 168 static int ssl23_read(s,buf,len)
 169 SSL *s;
 170 char *buf;
 171 int len;
 172         {
 173         int n;
 174
 175 #if 0
 176         if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
 177                 {
 178                 s->rwstate=SSL_NOTHING;
 179                 return(0);
 180                 }
 181 #endif
 182         errno=0;
 183         if (SSL_in_init(s) && (!s->in_handshake))
 184                 {
 185                 n=s->handshake_func(s);
 186                 if (n < 0) return(n);
 187                 if (n == 0)
 188                         {
 189                         SSLerr(SSL_F_SSL23_READ,SSL_R_SSL_HANDSHAKE_FAILURE);
 190                         return(-1);
 191                         }
 192                 return(SSL_read(s,buf,len));
 193                 }
 194         else
 195                 {
 196                 ssl_undefined_function(s);
 197                 return(-1);
 198                 }
 199         }
 200
 201 static int ssl23_write(s,buf,len)
 202 SSL *s;
 203 char *buf;
 204 int len;
 205         {
 206         int n;
 207
 208 #if 0
 209         if (s->shutdown & SSL_SENT_SHUTDOWN)
 210                 {
 211                 s->rwstate=SSL_NOTHING;
 212                 return(0);
 213                 }
 214 #endif
 215         errno=0;
 216         if (SSL_in_init(s) && (!s->in_handshake))
 217                 {
 218                 n=s->handshake_func(s);
 219                 if (n < 0) return(n);
 220                 if (n == 0)
 221                         {
 222                         SSLerr(SSL_F_SSL23_WRITE,SSL_R_SSL_HANDSHAKE_FAILURE);
 223                         return(-1);
 224                         }
 225                 return(SSL_write(s,buf,len));
 226                 }
 227         else
 228                 {
 229                 ssl_undefined_function(s);
 230                 return(-1);
 231                 }
 232         }