1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/os/ossrv/ssl/libssl/src/s2_enc.c Fri Jun 15 03:10:57 2012 +0200
1.3 @@ -0,0 +1,194 @@
1.4 +/* ssl/s2_enc.c */
1.5 +/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
1.6 + * All rights reserved.
1.7 + *
1.8 + * This package is an SSL implementation written
1.9 + * by Eric Young (eay@cryptsoft.com).
1.10 + * The implementation was written so as to conform with Netscapes SSL.
1.11 + *
1.12 + * This library is free for commercial and non-commercial use as long as
1.13 + * the following conditions are aheared to. The following conditions
1.14 + * apply to all code found in this distribution, be it the RC4, RSA,
1.15 + * lhash, DES, etc., code; not just the SSL code. The SSL documentation
1.16 + * included with this distribution is covered by the same copyright terms
1.17 + * except that the holder is Tim Hudson (tjh@cryptsoft.com).
1.18 + *
1.19 + * Copyright remains Eric Young's, and as such any Copyright notices in
1.20 + * the code are not to be removed.
1.21 + * If this package is used in a product, Eric Young should be given attribution
1.22 + * as the author of the parts of the library used.
1.23 + * This can be in the form of a textual message at program startup or
1.24 + * in documentation (online or textual) provided with the package.
1.25 + *
1.26 + * Redistribution and use in source and binary forms, with or without
1.27 + * modification, are permitted provided that the following conditions
1.28 + * are met:
1.29 + * 1. Redistributions of source code must retain the copyright
1.30 + * notice, this list of conditions and the following disclaimer.
1.31 + * 2. Redistributions in binary form must reproduce the above copyright
1.32 + * notice, this list of conditions and the following disclaimer in the
1.33 + * documentation and/or other materials provided with the distribution.
1.34 + * 3. All advertising materials mentioning features or use of this software
1.35 + * must display the following acknowledgement:
1.36 + * "This product includes cryptographic software written by
1.37 + * Eric Young (eay@cryptsoft.com)"
1.38 + * The word 'cryptographic' can be left out if the rouines from the library
1.39 + * being used are not cryptographic related :-).
1.40 + * 4. If you include any Windows specific code (or a derivative thereof) from
1.41 + * the apps directory (application code) you must include an acknowledgement:
1.42 + * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
1.43 + *
1.44 + * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
1.45 + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
1.46 + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
1.47 + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
1.48 + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
1.49 + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
1.50 + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
1.51 + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
1.52 + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
1.53 + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
1.54 + * SUCH DAMAGE.
1.55 + *
1.56 + * The licence and distribution terms for any publically available version or
1.57 + * derivative of this code cannot be changed. i.e. this code cannot simply be
1.58 + * copied and put under another distribution licence
1.59 + * [including the GNU Public Licence.]
1.60 + */
1.61 +
1.62 +#include "ssl_locl.h"
1.63 +#ifndef OPENSSL_NO_SSL2
1.64 +#include <stdio.h>
1.65 +
1.66 +int ssl2_enc_init(SSL *s, int client)
1.67 + {
1.68 + /* Max number of bytes needed */
1.69 + EVP_CIPHER_CTX *rs,*ws;
1.70 + const EVP_CIPHER *c;
1.71 + const EVP_MD *md;
1.72 + int num;
1.73 +
1.74 + if (!ssl_cipher_get_evp(s->session,&c,&md,NULL))
1.75 + {
1.76 + ssl2_return_error(s,SSL2_PE_NO_CIPHER);
1.77 + SSLerr(SSL_F_SSL2_ENC_INIT,SSL_R_PROBLEMS_MAPPING_CIPHER_FUNCTIONS);
1.78 + return(0);
1.79 + }
1.80 +
1.81 + s->read_hash=md;
1.82 + s->write_hash=md;
1.83 +
1.84 + if ((s->enc_read_ctx == NULL) &&
1.85 + ((s->enc_read_ctx=(EVP_CIPHER_CTX *)
1.86 + OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL))
1.87 + goto err;
1.88 +
1.89 + /* make sure it's intialized in case the malloc for enc_write_ctx fails
1.90 + * and we exit with an error */
1.91 + rs= s->enc_read_ctx;
1.92 + EVP_CIPHER_CTX_init(rs);
1.93 +
1.94 + if ((s->enc_write_ctx == NULL) &&
1.95 + ((s->enc_write_ctx=(EVP_CIPHER_CTX *)
1.96 + OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL))
1.97 + goto err;
1.98 +
1.99 + ws= s->enc_write_ctx;
1.100 + EVP_CIPHER_CTX_init(ws);
1.101 +
1.102 + num=c->key_len;
1.103 + s->s2->key_material_length=num*2;
1.104 + OPENSSL_assert(s->s2->key_material_length <= sizeof s->s2->key_material);
1.105 +
1.106 + if (ssl2_generate_key_material(s) <= 0)
1.107 + return 0;
1.108 +
1.109 + OPENSSL_assert(c->iv_len <= (int)sizeof(s->session->key_arg));
1.110 + EVP_EncryptInit_ex(ws,c,NULL,&(s->s2->key_material[(client)?num:0]),
1.111 + s->session->key_arg);
1.112 + EVP_DecryptInit_ex(rs,c,NULL,&(s->s2->key_material[(client)?0:num]),
1.113 + s->session->key_arg);
1.114 + s->s2->read_key= &(s->s2->key_material[(client)?0:num]);
1.115 + s->s2->write_key= &(s->s2->key_material[(client)?num:0]);
1.116 + return(1);
1.117 +err:
1.118 + SSLerr(SSL_F_SSL2_ENC_INIT,ERR_R_MALLOC_FAILURE);
1.119 + return(0);
1.120 + }
1.121 +
1.122 +/* read/writes from s->s2->mac_data using length for encrypt and
1.123 + * decrypt. It sets s->s2->padding and s->[rw]length
1.124 + * if we are encrypting */
1.125 +void ssl2_enc(SSL *s, int send)
1.126 + {
1.127 + EVP_CIPHER_CTX *ds;
1.128 + unsigned long l;
1.129 + int bs;
1.130 +
1.131 + if (send)
1.132 + {
1.133 + ds=s->enc_write_ctx;
1.134 + l=s->s2->wlength;
1.135 + }
1.136 + else
1.137 + {
1.138 + ds=s->enc_read_ctx;
1.139 + l=s->s2->rlength;
1.140 + }
1.141 +
1.142 + /* check for NULL cipher */
1.143 + if (ds == NULL) return;
1.144 +
1.145 +
1.146 + bs=ds->cipher->block_size;
1.147 + /* This should be using (bs-1) and bs instead of 7 and 8, but
1.148 + * what the hell. */
1.149 + if (bs == 8)
1.150 + l=(l+7)/8*8;
1.151 +
1.152 + EVP_Cipher(ds,s->s2->mac_data,s->s2->mac_data,l);
1.153 + }
1.154 +
1.155 +void ssl2_mac(SSL *s, unsigned char *md, int send)
1.156 + {
1.157 + EVP_MD_CTX c;
1.158 + unsigned char sequence[4],*p,*sec,*act;
1.159 + unsigned long seq;
1.160 + unsigned int len;
1.161 +
1.162 + if (send)
1.163 + {
1.164 + seq=s->s2->write_sequence;
1.165 + sec=s->s2->write_key;
1.166 + len=s->s2->wact_data_length;
1.167 + act=s->s2->wact_data;
1.168 + }
1.169 + else
1.170 + {
1.171 + seq=s->s2->read_sequence;
1.172 + sec=s->s2->read_key;
1.173 + len=s->s2->ract_data_length;
1.174 + act=s->s2->ract_data;
1.175 + }
1.176 +
1.177 + p= &(sequence[0]);
1.178 + l2n(seq,p);
1.179 +
1.180 + /* There has to be a MAC algorithm. */
1.181 + EVP_MD_CTX_init(&c);
1.182 + EVP_DigestInit_ex(&c, s->read_hash, NULL);
1.183 + EVP_DigestUpdate(&c,sec,
1.184 + EVP_CIPHER_CTX_key_length(s->enc_read_ctx));
1.185 + EVP_DigestUpdate(&c,act,len);
1.186 + /* the above line also does the pad data */
1.187 + EVP_DigestUpdate(&c,sequence,4);
1.188 + EVP_DigestFinal_ex(&c,md,NULL);
1.189 + EVP_MD_CTX_cleanup(&c);
1.190 + }
1.191 +#else /* !OPENSSL_NO_SSL2 */
1.192 +
1.193 +# if PEDANTIC
1.194 +static void *dummy=&dummy;
1.195 +# endif
1.196 +
1.197 +#endif