crypto/openssl-0.9.7d/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_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_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
 101 static long ssl23_default_timeout(void)
 102         {
 103         return(300);
 104         }
 105
 106 SSL_METHOD *sslv23_base_method(void)
 107         {
 108         return(&SSLv23_data);
 109         }
 110
 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
 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 */
 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
 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
 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
 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
 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         }