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 "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, const char *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 #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 compatibility" OPENSSL_VERSION_PTEXT;
  82
  83 static SSL_METHOD SSLv23_data= {
  84         TLS1_VERSION,
  85         tls1_new,
  86         tls1_clear,
  87         tls1_free,
  88         ssl_undefined_function,
  89         ssl_undefined_function,
  90         ssl23_read,
  91         (int (*)(struct ssl_st *, char *, int))ssl_undefined_function,
  92         ssl23_write,
  93         ssl_undefined_function,
  94         ssl_undefined_function,
  95         ssl_ok,
  96         ssl3_ctrl,
  97         ssl3_ctx_ctrl,
  98         ssl23_get_cipher_by_char,
  99         ssl23_put_cipher_by_char,
 100         ssl_undefined_function,
 101         ssl23_num_ciphers,
 102         ssl23_get_cipher,
 103         ssl_bad_method,
 104         ssl23_default_timeout,
 105         &ssl3_undef_enc_method,
 106         };
 107
 108 static long ssl23_default_timeout(void)
 109         {
 110         return(300);
 111         }
 112
 113 SSL_METHOD *sslv23_base_method(void)
 114         {
 115         return(&SSLv23_data);
 116         }
 117
 118 static int ssl23_num_ciphers(void)
 119         {
 120         return(ssl3_num_ciphers()+ssl2_num_ciphers());
 121         }
 122
 123 static SSL_CIPHER *ssl23_get_cipher(unsigned int u)
 124         {
 125         unsigned int uu=ssl3_num_ciphers();
 126
 127         if (u < uu)
 128                 return(ssl3_get_cipher(u));
 129         else
 130                 return(ssl2_get_cipher(u-uu));
 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         if (cp == NULL)
 147                 cp=ssl2_get_cipher_by_char(p);
 148         return(cp);
 149         }
 150
 151 static int ssl23_put_cipher_by_char(const SSL_CIPHER *c, unsigned char *p)
 152         {
 153         long l;
 154
 155         /* We can write SSLv2 and SSLv3 ciphers */
 156         if (p != NULL)
 157                 {
 158                 l=c->id;
 159                 p[0]=((unsigned char)(l>>16L))&0xFF;
 160                 p[1]=((unsigned char)(l>> 8L))&0xFF;
 161                 p[2]=((unsigned char)(l     ))&0xFF;
 162                 }
 163         return(3);
 164         }
 165
 166 static int ssl23_read(SSL *s, char *buf, int len)
 167         {
 168         int n;
 169
 170 #if 0
 171         if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
 172                 {
 173                 s->rwstate=SSL_NOTHING;
 174                 return(0);
 175                 }
 176 #endif
 177         clear_sys_error();
 178         if (SSL_in_init(s) && (!s->in_handshake))
 179                 {
 180                 n=s->handshake_func(s);
 181                 if (n < 0) return(n);
 182                 if (n == 0)
 183                         {
 184                         SSLerr(SSL_F_SSL23_READ,SSL_R_SSL_HANDSHAKE_FAILURE);
 185                         return(-1);
 186                         }
 187                 return(SSL_read(s,buf,len));
 188                 }
 189         else
 190                 {
 191                 ssl_undefined_function(s);
 192                 return(-1);
 193                 }
 194         }
 195
 196 static int ssl23_write(SSL *s, const char *buf, int len)
 197         {
 198         int n;
 199
 200 #if 0
 201         if (s->shutdown & SSL_SENT_SHUTDOWN)
 202                 {
 203                 s->rwstate=SSL_NOTHING;
 204                 return(0);
 205                 }
 206 #endif
 207         clear_sys_error();
 208         if (SSL_in_init(s) && (!s->in_handshake))
 209                 {
 210                 n=s->handshake_func(s);
 211                 if (n < 0) return(n);
 212                 if (n == 0)
 213                         {
 214                         SSLerr(SSL_F_SSL23_WRITE,SSL_R_SSL_HANDSHAKE_FAILURE);
 215                         return(-1);
 216                         }
 217                 return(SSL_write(s,buf,len));
 218                 }
 219         else
 220                 {
 221                 ssl_undefined_function(s);
 222                 return(-1);
 223                 }
 224         }