/* ssl/s2_lib.c */
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
* All rights reserved.
*
* This package is an SSL implementation written
* by Eric Young (eay@cryptsoft.com).
* The implementation was written so as to conform with Netscapes SSL.
*
* This library is free for commercial and non-commercial use as long as
* the following conditions are aheared to. The following conditions
* apply to all code found in this distribution, be it the RC4, RSA,
* lhash, DES, etc., code; not just the SSL code. The SSL documentation
* included with this distribution is covered by the same copyright terms
* except that the holder is Tim Hudson (tjh@cryptsoft.com).
*
* Copyright remains Eric Young's, and as such any Copyright notices in
* the code are not to be removed.
* If this package is used in a product, Eric Young should be given attribution
* as the author of the parts of the library used.
* This can be in the form of a textual message at program startup or
* in documentation (online or textual) provided with the package.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* "This product includes cryptographic software written by
* Eric Young (eay@cryptsoft.com)"
* The word 'cryptographic' can be left out if the rouines from the library
* being used are not cryptographic related :-).
* 4. If you include any Windows specific code (or a derivative thereof) from
* the apps directory (application code) you must include an acknowledgement:
* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
*
* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* The licence and distribution terms for any publically available version or
* derivative of this code cannot be changed. i.e. this code cannot simply be
* copied and put under another distribution licence
* [including the GNU Public Licence.]
*/
#include "ssl_locl.h"
#ifndef OPENSSL_NO_SSL2
#include <stdio.h>
#include <openssl/objects.h>
#include <openssl/evp.h>
#include <openssl/md5.h>
const char ssl2_version_str[]="SSLv2" OPENSSL_VERSION_PTEXT;
#define SSL2_NUM_CIPHERS (sizeof(ssl2_ciphers)/sizeof(SSL_CIPHER))
/* list of available SSLv2 ciphers (sorted by id) */
OPENSSL_GLOBAL SSL_CIPHER ssl2_ciphers[]={
/* NULL_WITH_MD5 v3 */
#if 0
{
1,
SSL2_TXT_NULL_WITH_MD5,
SSL2_CK_NULL_WITH_MD5,
SSL_kRSA|SSL_aRSA|SSL_eNULL|SSL_MD5|SSL_SSLV2,
SSL_EXPORT|SSL_EXP40|SSL_STRONG_NONE,
0,
0,
0,
SSL_ALL_CIPHERS,
SSL_ALL_STRENGTHS,
},
#endif
/* RC4_128_WITH_MD5 */
{
1,
SSL2_TXT_RC4_128_WITH_MD5,
SSL2_CK_RC4_128_WITH_MD5,
SSL_kRSA|SSL_aRSA|SSL_RC4|SSL_MD5|SSL_SSLV2,
SSL_NOT_EXP|SSL_MEDIUM,
0,
128,
128,
SSL_ALL_CIPHERS,
SSL_ALL_STRENGTHS,
},
/* RC4_128_EXPORT40_WITH_MD5 */
{
1,
SSL2_TXT_RC4_128_EXPORT40_WITH_MD5,
SSL2_CK_RC4_128_EXPORT40_WITH_MD5,
SSL_kRSA|SSL_aRSA|SSL_RC4|SSL_MD5|SSL_SSLV2,
SSL_EXPORT|SSL_EXP40,
SSL2_CF_5_BYTE_ENC,
40,
128,
SSL_ALL_CIPHERS,
SSL_ALL_STRENGTHS,
},
/* RC2_128_CBC_WITH_MD5 */
{
1,
SSL2_TXT_RC2_128_CBC_WITH_MD5,
SSL2_CK_RC2_128_CBC_WITH_MD5,
SSL_kRSA|SSL_aRSA|SSL_RC2|SSL_MD5|SSL_SSLV2,
SSL_NOT_EXP|SSL_MEDIUM,
0,
128,
128,
SSL_ALL_CIPHERS,
SSL_ALL_STRENGTHS,
},
/* RC2_128_CBC_EXPORT40_WITH_MD5 */
{
1,
SSL2_TXT_RC2_128_CBC_EXPORT40_WITH_MD5,
SSL2_CK_RC2_128_CBC_EXPORT40_WITH_MD5,
SSL_kRSA|SSL_aRSA|SSL_RC2|SSL_MD5|SSL_SSLV2,
SSL_EXPORT|SSL_EXP40,
SSL2_CF_5_BYTE_ENC,
40,
128,
SSL_ALL_CIPHERS,
SSL_ALL_STRENGTHS,
},
/* IDEA_128_CBC_WITH_MD5 */
#ifndef OPENSSL_NO_IDEA
{
1,
SSL2_TXT_IDEA_128_CBC_WITH_MD5,
SSL2_CK_IDEA_128_CBC_WITH_MD5,
SSL_kRSA|SSL_aRSA|SSL_IDEA|SSL_MD5|SSL_SSLV2,
SSL_NOT_EXP|SSL_MEDIUM,
0,
128,
128,
SSL_ALL_CIPHERS,
SSL_ALL_STRENGTHS,
},
#endif
/* DES_64_CBC_WITH_MD5 */
{
1,
SSL2_TXT_DES_64_CBC_WITH_MD5,
SSL2_CK_DES_64_CBC_WITH_MD5,
SSL_kRSA|SSL_aRSA|SSL_DES|SSL_MD5|SSL_SSLV2,
SSL_NOT_EXP|SSL_LOW,
0,
56,
56,
SSL_ALL_CIPHERS,
SSL_ALL_STRENGTHS,
},
/* DES_192_EDE3_CBC_WITH_MD5 */
{
1,
SSL2_TXT_DES_192_EDE3_CBC_WITH_MD5,
SSL2_CK_DES_192_EDE3_CBC_WITH_MD5,
SSL_kRSA|SSL_aRSA|SSL_3DES|SSL_MD5|SSL_SSLV2,
SSL_NOT_EXP|SSL_HIGH,
0,
168,
168,
SSL_ALL_CIPHERS,
SSL_ALL_STRENGTHS,
},
/* RC4_64_WITH_MD5 */
#if 0
{
1,
SSL2_TXT_RC4_64_WITH_MD5,
SSL2_CK_RC4_64_WITH_MD5,
SSL_kRSA|SSL_aRSA|SSL_RC4|SSL_MD5|SSL_SSLV2,
SSL_NOT_EXP|SSL_LOW,
SSL2_CF_8_BYTE_ENC,
64,
64,
SSL_ALL_CIPHERS,
SSL_ALL_STRENGTHS,
},
#endif
/* NULL SSLeay (testing) */
#if 0
{
0,
SSL2_TXT_NULL,
SSL2_CK_NULL,
0,
SSL_STRONG_NONE,
0,
0,
0,
SSL_ALL_CIPHERS,
SSL_ALL_STRENGTHS,
},
#endif
/* end of list :-) */
};
long ssl2_default_timeout(void)
{
return(300);
}
IMPLEMENT_ssl2_meth_func(sslv2_base_method,
ssl_undefined_function,
ssl_undefined_function,
ssl_bad_method)
int ssl2_num_ciphers(void)
{
return(SSL2_NUM_CIPHERS);
}
SSL_CIPHER *ssl2_get_cipher(unsigned int u)
{
if (u < SSL2_NUM_CIPHERS)
return(&(ssl2_ciphers[SSL2_NUM_CIPHERS-1-u]));
else
return(NULL);
}
int ssl2_pending(const SSL *s)
{
return SSL_in_init(s) ? 0 : s->s2->ract_data_length;
}
int ssl2_new(SSL *s)
{
SSL2_STATE *s2;
if ((s2=OPENSSL_malloc(sizeof *s2)) == NULL) goto err;
memset(s2,0,sizeof *s2);
#if SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER + 3 > SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER + 2
# error "assertion failed"
#endif
if ((s2->rbuf=OPENSSL_malloc(
SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER+2)) == NULL) goto err;
/* wbuf needs one byte more because when using two-byte headers,
* we leave the first byte unused in do_ssl_write (s2_pkt.c) */
if ((s2->wbuf=OPENSSL_malloc(
SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER+3)) == NULL) goto err;
s->s2=s2;
ssl2_clear(s);
return(1);
err:
if (s2 != NULL)
{
if (s2->wbuf != NULL) OPENSSL_free(s2->wbuf);
if (s2->rbuf != NULL) OPENSSL_free(s2->rbuf);
OPENSSL_free(s2);
}
return(0);
}
void ssl2_free(SSL *s)
{
SSL2_STATE *s2;
if(s == NULL)
return;
s2=s->s2;
if (s2->rbuf != NULL) OPENSSL_free(s2->rbuf);
if (s2->wbuf != NULL) OPENSSL_free(s2->wbuf);
OPENSSL_cleanse(s2,sizeof *s2);
OPENSSL_free(s2);
s->s2=NULL;
}
void ssl2_clear(SSL *s)
{
SSL2_STATE *s2;
unsigned char *rbuf,*wbuf;
s2=s->s2;
rbuf=s2->rbuf;
wbuf=s2->wbuf;
memset(s2,0,sizeof *s2);
s2->rbuf=rbuf;
s2->wbuf=wbuf;
s2->clear_text=1;
s->packet=s2->rbuf;
s->version=SSL2_VERSION;
s->packet_length=0;
}
long ssl2_ctrl(SSL *s, int cmd, long larg, void *parg)
{
int ret=0;
switch(cmd)
{
case SSL_CTRL_GET_SESSION_REUSED:
ret=s->hit;
break;
default:
break;
}
return(ret);
}
long ssl2_callback_ctrl(SSL *s, int cmd, void (*fp)(void))
{
return(0);
}
long ssl2_ctx_ctrl(SSL_CTX *ctx, int cmd, long larg, void *parg)
{
return(0);
}
long ssl2_ctx_callback_ctrl(SSL_CTX *ctx, int cmd, void (*fp)(void))
{
return(0);
}
/* This function needs to check if the ciphers required are actually
* available */
SSL_CIPHER *ssl2_get_cipher_by_char(const unsigned char *p)
{
SSL_CIPHER c,*cp;
unsigned long id;
id=0x02000000L|((unsigned long)p[0]<<16L)|
((unsigned long)p[1]<<8L)|(unsigned long)p[2];
c.id=id;
cp = (SSL_CIPHER *)OBJ_bsearch((char *)&c,
(char *)ssl2_ciphers,
SSL2_NUM_CIPHERS,sizeof(SSL_CIPHER),
FP_ICC ssl_cipher_id_cmp);
if ((cp == NULL) || (cp->valid == 0))
return NULL;
else
return cp;
}
int ssl2_put_cipher_by_char(const SSL_CIPHER *c, unsigned char *p)
{
long l;
if (p != NULL)
{
l=c->id;
if ((l & 0xff000000) != 0x02000000) return(0);
p[0]=((unsigned char)(l>>16L))&0xFF;
p[1]=((unsigned char)(l>> 8L))&0xFF;
p[2]=((unsigned char)(l ))&0xFF;
}
return(3);
}
int ssl2_generate_key_material(SSL *s)
{
unsigned int i;
EVP_MD_CTX ctx;
unsigned char *km;
unsigned char c='0';
const EVP_MD *md5;
md5 = EVP_md5();
#ifdef CHARSET_EBCDIC
c = os_toascii['0']; /* Must be an ASCII '0', not EBCDIC '0',
see SSLv2 docu */
#endif
EVP_MD_CTX_init(&ctx);
km=s->s2->key_material;
if (s->session->master_key_length < 0 ||
s->session->master_key_length > (int)sizeof(s->session->master_key))
{
SSLerr(SSL_F_SSL2_GENERATE_KEY_MATERIAL, ERR_R_INTERNAL_ERROR);
return 0;
}
for (i=0; i<s->s2->key_material_length; i += EVP_MD_size(md5))
{
if (((km - s->s2->key_material) + EVP_MD_size(md5)) >
(int)sizeof(s->s2->key_material))
{
/* EVP_DigestFinal_ex() below would write beyond buffer */
SSLerr(SSL_F_SSL2_GENERATE_KEY_MATERIAL, ERR_R_INTERNAL_ERROR);
return 0;
}
EVP_DigestInit_ex(&ctx, md5, NULL);
OPENSSL_assert(s->session->master_key_length >= 0
&& s->session->master_key_length
< (int)sizeof(s->session->master_key));
EVP_DigestUpdate(&ctx,s->session->master_key,s->session->master_key_length);
EVP_DigestUpdate(&ctx,&c,1);
c++;
EVP_DigestUpdate(&ctx,s->s2->challenge,s->s2->challenge_length);
EVP_DigestUpdate(&ctx,s->s2->conn_id,s->s2->conn_id_length);
EVP_DigestFinal_ex(&ctx,km,NULL);
km += EVP_MD_size(md5);
}
EVP_MD_CTX_cleanup(&ctx);
return 1;
}
void ssl2_return_error(SSL *s, int err)
{
if (!s->error)
{
s->error=3;
s->error_code=err;
ssl2_write_error(s);
}
}
void ssl2_write_error(SSL *s)
{
unsigned char buf[3];
int i,error;
buf[0]=SSL2_MT_ERROR;
buf[1]=(s->error_code>>8)&0xff;
buf[2]=(s->error_code)&0xff;
/* state=s->rwstate;*/
error=s->error; /* number of bytes left to write */
s->error=0;
OPENSSL_assert(error >= 0 && error <= (int)sizeof(buf));
i=ssl2_write(s,&(buf[3-error]),error);
/* if (i == error) s->rwstate=state; */
if (i < 0)
s->error=error;
else
{
s->error=error-i;
if (s->error == 0)
if (s->msg_callback)
s->msg_callback(1, s->version, 0, buf, 3, s, s->msg_callback_arg); /* ERROR */
}
}
int ssl2_shutdown(SSL *s)
{
s->shutdown=(SSL_SENT_SHUTDOWN|SSL_RECEIVED_SHUTDOWN);
return(1);
}
#else /* !OPENSSL_NO_SSL2 */
# if PEDANTIC
static void *dummy=&dummy;
# endif
#endif