source: TI05-delivery/trunk/src/bbftp-server-3.2.0/bbftpd/bbftpd_crypt.c @ 1431

Subversion URL: http://proj.badc.rl.ac.uk/svn/ndg/TI05-delivery/trunk/src/bbftp-server-3.2.0/bbftpd/bbftpd_crypt.c
Revision 1431, 4.6 KB checked in by spascoe, 14 years ago (diff)

bbftpd.h should be the first #include so that glibc headers pick up
any configuration flags.

Line 
1/*
2 * bbftpd/bbftpd_crypt.c
3 * Copyright (C) 1999, 2000, 2001, 2002 IN2P3, CNRS
4 * bbftp@in2p3.fr
5 * http://doc.in2p3.fr/bbftp
6 *
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version 2
10 * of the License, or any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
20 */ 
21
22/****************************************************************************
23
24 
25 
26 bbftpd_crypt.c v 1.4.0  2000/03/22
27                v 1.6.1  2000/03/28 - Portage to OSF1
28                v 1.8.0  2000/04/14 - Introduce RSA Cryptage
29                v 1.8.2  2000/04/17 - Portage to OSF1
30                v 1.8.4  2000/04/21 - Random seed done in do_deamon.c
31                v 1.8.7  2000/05/24 - Modify headers
32                v 1.8.10 2000/08/11 - Portage to Linux
33                v 1.9.0  2000/08/18 - Use configure to help portage
34                v 2.0.0  2000/12/18 - Use incontrolsock and outcontrolsock
35                v 2.0.1  2001/04/23 - Correct indentation
36                v 2.1.0  2001/06/11 - Change file name
37
38*****************************************************************************/
39#include <bbftpd.h>
40
41#include <errno.h>
42#include <sys/types.h>
43#include <sys/socket.h>
44#include <netinet/in.h>
45#include <bbftpd_private_log.h>
46#if TIME_WITH_SYS_TIME
47# include <sys/time.h>
48# include <time.h>
49#else
50# if HAVE_SYS_TIME_H
51#  include <sys/time.h>
52# else
53#  include <time.h>
54# endif
55#endif
56
57#include <common.h>
58#include <daemon.h>
59#include <structures.h>
60#include <openssl/rsa.h>
61#include <openssl/err.h>
62#include <openssl/rand.h>
63
64#include <daemon_proto.h>
65
66extern int  outcontrolsock ;
67extern  int     sendcontrolto ;
68extern RSA  *myrsa ;
69
70void sendcrypt() 
71{
72    struct message    *mess ;
73    struct mess_sec    *msg_sec ;
74    char    buf[MAXMESSLEN] ;
75    unsigned char    pubkey[NBITSINKEY] ;
76    unsigned char    pubexponent[NBITSINKEY] ;
77    int        lenkey ;
78    int        lenexpo ;
79   
80    /*
81    ** Ask for the private and public Key
82    */
83    if ( (myrsa = RSA_generate_key(NBITSINKEY,3,NULL,NULL)) == NULL) {
84        bbftpd_log(BBFTPD_ERR,"%s",ERR_error_string(ERR_get_error(),NULL) ) ;
85        exit(1) ;
86    }
87    /*
88    ** Now extract the public key in order to send it
89    */
90    lenkey  = BN_bn2mpi(myrsa->n,pubkey) ;
91    lenexpo = BN_bn2mpi(myrsa->e,pubexponent) ;
92    mess = (struct message *) buf ;
93    mess->code = MSG_CRYPT ;
94#ifndef WORDS_BIGENDIAN
95    mess->msglen = ntohl(CRYPTMESSLEN+lenkey+lenexpo) ;
96#else
97    mess->msglen = CRYPTMESSLEN+lenkey+lenexpo ;
98#endif
99    if (writemessage(outcontrolsock,buf,MINMESSLEN,sendcontrolto) < 0 ) {
100        bbftpd_log(BBFTPD_ERR,"Error on sendcrypt 1") ;
101        exit(1) ;
102    }
103    msg_sec  = (struct mess_sec    *) buf ;
104    msg_sec->crtype  = CRYPT_RSA_PKCS1_OAEP_PADDING ;
105#ifndef WORDS_BIGENDIAN
106    msg_sec->pubkeylen  = ntohl(lenkey) ;
107    msg_sec->expolen  = ntohl(lenexpo) ;
108#else
109    msg_sec->pubkeylen  = lenkey ;
110    msg_sec->expolen  = lenexpo ;
111#endif
112    if (writemessage(outcontrolsock,buf,CRYPTMESSLEN,sendcontrolto) < 0 ) {
113        bbftpd_log(BBFTPD_ERR,"Error on sendcrypt 2") ;
114        exit(1) ;
115    }
116    /*
117    ** Send Key and exponent
118    */
119    if (writemessage(outcontrolsock,pubkey,lenkey,sendcontrolto) < 0 ) {
120        bbftpd_log(BBFTPD_ERR,"Error on sendcrypt pubkey") ;
121        exit(1) ;
122    }
123    if (writemessage(outcontrolsock,pubexponent,lenexpo,sendcontrolto) < 0 ) {
124        bbftpd_log(BBFTPD_ERR,"Error on sendcrypt pubexponent") ;
125        exit(1) ;
126    }
127}
128
129int decodersapass(char *buffer, char *username, char *password) 
130{
131    struct mess_rsa *msg_rsa ;
132    int    lenuser ;
133    int lenpass ;
134   
135    msg_rsa = (struct mess_rsa *) buffer ;
136
137#ifndef WORDS_BIGENDIAN
138    msg_rsa->numuser = ntohl(msg_rsa->numuser) ;
139    msg_rsa->numpass = ntohl(msg_rsa->numpass) ;
140#endif
141    lenuser = RSA_private_decrypt(msg_rsa->numuser,msg_rsa->cryptuser,(unsigned char *)username,myrsa,RSA_PKCS1_OAEP_PADDING) ;
142    username[lenuser] = '\0' ;
143    lenpass = RSA_private_decrypt(msg_rsa->numpass,msg_rsa->cryptpass,(unsigned char *)password,myrsa,RSA_PKCS1_OAEP_PADDING) ;
144    password[lenpass] = '\0' ;
145   
146    return 0 ;
147}
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