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#include <sys/param.h>
#include <netinet/in.h>
#include <pwd.h>
#ifdef SHADOW
#include <shadow.h>
#endif
#include <netdb.h>
#include "youbin.h"
#include "server.h"
#include <stdio.h>
extern char *NAK_reason;
/*
* Authentification.
*/
int check_pass( StateP sp, char *passwd, int head )
{
struct passwd *pw;
#ifdef SHADOW
struct spwd *spw;
#endif
char *pw_passwd;
char *crypted_passwd;
/* Check user name with reading passwd file. */
if((pw = getpwnam( sp->parent->name )) == NULL) { /* Invalid user. */
warn_log("Invalid user name: %s\n", sp->parent->name);
return FAIL;
}
switch( sp->mode.auth_mode ){
case NONE:
return ( head == 0 );
case PLAIN:
#ifdef SHADOW
if((spw = getspnam( sp->parent->name )) == NULL) { /* Invalid user. */
warn_log("Invalid user name: %s\n", sp->parent->name);
return FAIL;
}
pw_passwd = spw->sp_pwdp;
#else
pw_passwd = pw->pw_passwd;
#endif
return !(strcmp( pw->pw_passwd, (char *)crypt( passwd, pw_passwd )));
case ROK:
return ( is_trusted_user( sp->parent->name ));
default:
return FAIL;
}
}
int
is_trusted_user(user_name)
char *user_name;
{
int saved_uid, ruserok_result;
struct hostent *hp;
if ((hp = gethostbyaddr((char *)&ca.sin_addr,
sizeof(ca.sin_addr), ca.sin_family)) == NULL) {
sys_error_log("gethostbyaddr");
return (FAIL);
}
#ifdef BUGGY_RUSEROK
saved_uid = getuid();
#endif
ruserok_result = ruserok(hp->h_name, 0, user_name, user_name);
#ifdef BUGGY_RUSEROK
setuid(saved_uid);
#endif
return ((IPPORT_RESERVED / 2) <= ntohs(ca.sin_port) &&
ntohs(ca.sin_port) < IPPORT_RESERVED &&
ruserok_result == 0);
}
struct h_f {
int size;
char *pattern;
} header_field[33];
char head_buff[MESS_LEN];
void init_header_list( char *mess )
{
char *cptr;
int i;
strncpy( head_buff, mess, MESS_LEN );
head_buff[MESS_LEN - 1 ] = 0;
for( i = 0, cptr = head_buff; ( i < 32 ) && *cptr; i++ ){
header_field[i].pattern = cptr;
if(( cptr = index( cptr, ',' )) == NULL ){
header_field[i].size = strlen( header_field[i].pattern );
i++;
break;
} else {
*cptr++ = 0;
header_field[i].size = strlen( header_field[i].pattern );
}
}
for( ; i < 33; i++ ) { /* 33 rd is a sentinel */
header_field[i].size = 0;
header_field[i].pattern = NULL;
}
}
int headers( char *header_list )
{
int i, header_req, length;
char *cptr;
for( header_req=0; *header_list; header_list += length ){
if( *header_list == ',' ) header_list++;
if(( cptr = index( header_list, ',' )) != NULL ){
length = cptr - header_list;
} else {
length = strlen( header_list );
}
for( i = 0; i < 32 ; i++ ){
if( header_field[i].size == 0 ) break; /* usually less than 32 field */
if( header_field[i].size == length ) {
if( strncasecmp( header_field[i].pattern, header_list, length ) == 0 ) {
header_req |= ( 1 << i );
}
}
}
}
return header_req;
}
isPrintHead( char *line, unsigned int req )
{
struct h_f *hfp;
for( req >>= 1, hfp = header_field + 1 ; req; hfp++, req >>= 1 ){
if( req & 1 ){
if( strncasecmp( line, hfp->pattern, hfp->size ) == 0 ) return TRUE;
}
}
return FALSE;
}
struct auth_list {
enum a_mode am;
char *mode_name;
} a_l[5] = {{NONE, "none"}, { PLAIN, "plain"}, { ROK, "rok" },
{PGP, "pgp"}, {(enum a_mode) -1, "" }};
enum a_mode conv_a_mode( char *auth )
{ struct auth_list *alp;
for( alp = a_l; alp->am != (enum a_mode) -1; alp++ ){
if( strcmp( alp->mode_name, auth ) == 0 ) break;
}
return alp->am;
}
void put6bit( char*, int, int );
int mimedecode( source, dest )
char *source, *dest;
{
int pos, data;
for( pos = 0; ( data = get6bit( *source )) < 64; source++, pos += 6 ){
put6bit( dest, pos, data );
}
}
void put6bit( buffer, pos, data )
char *buffer;
int pos, data;
{
char *byte_pos;
int bit_pos;
byte_pos = buffer + ( pos / 8 );
bit_pos = pos % 8;
data &= 0x3f; /* Mask 6 bits */
if( bit_pos > 2 ) {
*byte_pos &= ~( 0x3f >> ( bit_pos - 2 ));
*byte_pos++ |= data >> ( bit_pos - 2 );
}
*byte_pos &= ~( 0x3f << (( 10 - bit_pos ) % 8 ));
*byte_pos |= data << (( 10 - bit_pos ) % 8 );
}
int get6bit( data )
int data;
{
static char *base64 =
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
char *pos;
return (pos = index( base64, data ))== NULL ? 64 : pos - base64;
}
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