ssl/s23_lib.c

   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_write(SSL *s, const void *buf, int len);
  67 static long ssl23_default_timeout(void );
  68 static int ssl23_put_cipher_by_char(const SSL_CIPHER *c, unsigned char *p);
  69 static SSL_CIPHER *ssl23_get_cipher_by_char(const unsigned char *p);
  70 const char *SSL23_version_str="SSLv2/3 compatibility" OPENSSL_VERSION_PTEXT;
  71
  72 static 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         ssl_undefined_function,
  96         ssl3_callback_ctrl,
  97         ssl3_ctx_callback_ctrl,
  98         };
  99
 100 static long ssl23_default_timeout(void)
 101         {
 102         return(300);
 103         }
 104
 105 SSL_METHOD *sslv23_base_method(void)
 106         {
 107         return(&SSLv23_data);
 108         }
 109
 110 static int ssl23_num_ciphers(void)
 111         {
 112         return(ssl3_num_ciphers()
 113 #ifndef OPENSSL_NO_SSL2
 114                + ssl2_num_ciphers()
 115 #endif
 116             );
 117         }
 118
 119 static SSL_CIPHER *ssl23_get_cipher(unsigned int u)
 120         {
 121         unsigned int uu=ssl3_num_ciphers();
 122
 123         if (u < uu)
 124                 return(ssl3_get_cipher(u));
 125         else
 126 #ifndef OPENSSL_NO_SSL2
 127                 return(ssl2_get_cipher(u-uu));
 128 #else
 129                 return(NULL);
 130 #endif
 131         }
 132
 133 /* This function needs to check if the ciphers required are actually
 134  * available */
 135 static SSL_CIPHER *ssl23_get_cipher_by_char(const 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 #ifndef OPENSSL_NO_SSL2
 147         if (cp == NULL)
 148                 cp=ssl2_get_cipher_by_char(p);
 149 #endif
 150         return(cp);
 151         }
 152
 153 static int ssl23_put_cipher_by_char(const SSL_CIPHER *c, 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(SSL *s, void *buf, int len)
 169         {
 170         int n;
 171
 172 #if 0
 173         if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
 174                 {
 175                 s->rwstate=SSL_NOTHING;
 176                 return(0);
 177                 }
 178 #endif
 179         clear_sys_error();
 180         if (SSL_in_init(s) && (!s->in_handshake))
 181                 {
 182                 n=s->handshake_func(s);
 183                 if (n < 0) return(n);
 184                 if (n == 0)
 185                         {
 186                         SSLerr(SSL_F_SSL23_READ,SSL_R_SSL_HANDSHAKE_FAILURE);
 187                         return(-1);
 188                         }
 189                 return(SSL_read(s,buf,len));
 190                 }
 191         else
 192                 {
 193                 ssl_undefined_function(s);
 194                 return(-1);
 195                 }
 196         }
 197
 198 static int ssl23_write(SSL *s, const void *buf, int len)
 199         {
 200         int n;
 201
 202 #if 0
 203         if (s->shutdown & SSL_SENT_SHUTDOWN)
 204                 {
 205                 s->rwstate=SSL_NOTHING;
 206                 return(0);
 207                 }
 208 #endif
 209         clear_sys_error();
 210         if (SSL_in_init(s) && (!s->in_handshake))
 211                 {
 212                 n=s->handshake_func(s);
 213                 if (n < 0) return(n);
 214                 if (n == 0)
 215                         {
 216                         SSLerr(SSL_F_SSL23_WRITE,SSL_R_SSL_HANDSHAKE_FAILURE);
 217                         return(-1);
 218                         }
 219                 return(SSL_write(s,buf,len));
 220                 }
 221         else
 222                 {
 223                 ssl_undefined_function(s);
 224                 return(-1);
 225                 }
 226         }