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lssproto_util.c
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lssproto_util.c
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#define _LSSPROTOUTIL_C_
#include "version.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#ifndef WIN32
#include <unistd.h>
#include <strings.h>
#endif
#include "lssproto_util.h"
//ttom +2 for degug
#define IS_2BYTEWORD( _a_ ) ( (char)(0x80) <= (_a_) && (_a_) <= (char)(0xFF) )
#include "common.h"
#ifdef lssproto__ENCRYPT
long lssproto_ringoCompressor( unsigned char *code , long codelen , unsigned char *text , long textlen);
long lssproto_ringoDecompressor( unsigned char *text , long textlen , unsigned char *code , long codelen);
#endif
/*
lsrpc routines
*/
int lssproto_AllocateCommonWork(int bufsiz)
{
lssproto.workbufsize = bufsiz;
lssproto.work = NULL;
lssproto.arraywork = NULL;
lssproto.escapework = NULL;
lssproto.val_str = NULL;
lssproto.token_list = NULL;
lssproto.cryptwork = NULL;
lssproto.jencodecopy = NULL;
lssproto.jencodeout = NULL;
lssproto.compresswork = NULL;
lssproto.work = (char*)calloc( 1, lssproto.workbufsize );
lssproto.arraywork = (char*)calloc( 1, lssproto.workbufsize );
lssproto.escapework = (char*)calloc( 1, lssproto.workbufsize );
lssproto.val_str = (char*)calloc( 1, lssproto.workbufsize );
lssproto.token_list = (char**)calloc( 1, lssproto.workbufsize *sizeof( char** ) );
lssproto.cryptwork = (char*)calloc( 1, lssproto.workbufsize * 3 );
lssproto.jencodecopy = (char*)calloc( 1, lssproto.workbufsize * 3 );
lssproto.jencodeout = (char*)calloc( 1, lssproto.workbufsize * 3 );
lssproto.compresswork = (char*)calloc( 1, lssproto.workbufsize * 3 );
memset( lssproto.work , 0, lssproto.workbufsize );
memset( lssproto.arraywork , 0, lssproto.workbufsize );
memset( lssproto.escapework , 0, lssproto.workbufsize );
memset( lssproto.val_str , 0, lssproto.workbufsize );
memset( (char*)lssproto.token_list ,0, lssproto.workbufsize*sizeof(char**) );
memset( lssproto.cryptwork , 0, lssproto.workbufsize*3 );
memset( lssproto.jencodecopy , 0, lssproto.workbufsize*3 );
memset( lssproto.jencodeout , 0, lssproto.workbufsize*3 );
memset( lssproto.compresswork , 0, lssproto.workbufsize*3 );
if( lssproto.work == NULL ||
lssproto.arraywork == NULL ||
lssproto.escapework == NULL ||
lssproto.val_str == NULL ||
lssproto.token_list == NULL ||
lssproto.cryptwork == NULL ||
lssproto.jencodecopy == NULL ||
lssproto.jencodeout == NULL ||
lssproto.compresswork == NULL ){
free( lssproto.work);free( lssproto.val_str);
free( lssproto.escapework);free( lssproto.arraywork );
free( lssproto.token_list);free( lssproto.cryptwork );
free( lssproto.jencodecopy);free( lssproto.jencodeout );
free( lssproto.compresswork );
return -1;
}
return 0;
}
/**********
Get message information from a network input
**********/
void lssproto_GetMessageInfo( int *id , char *funcname , int len, char **tk )
{
if( tk[0] == NULL || tk[1] == NULL ){
*id = 0;
lssproto_strcpysafe( funcname , "" , len );
return;
}
*id = strtoul( tk[0] ,NULL,10);
lssproto_strcpysafe( funcname , tk[1] , len );
return;
}
/********************************************
string utilities
*********************************************/
void lssproto_strcpysafe( char *dest, char *src, int maxlen )
{
int i;
for(i=0;i<maxlen-1;i++){
dest[i] = src[i];
if( src[i]==0)break;
}
dest[i]=0;
}
void lssproto_strcatsafe( char *dest , char *src , int maxlen )
{
int i,j;
for(i=0;i<maxlen-1;i++){
if( dest[i] == 0 ){
for(j=i;j<maxlen-1;j++){
dest[j]= src[j-i];
if( src[j-i] == 0 )break;
}
dest[j]=0;
break;
}
}
}
char*lssproto_mkstr_int( int i )
{
#define MKSTR_INT(v) lssproto_Ltoa( (long)(v))
lssproto_strcpysafe( lssproto.val_str , (char*)MKSTR_INT(i) , lssproto.workbufsize );
lssproto_strcatsafe( lssproto.val_str ," " , lssproto.workbufsize );
return lssproto.val_str;
}
char*lssproto_mkstr_u_int( unsigned int i )
{
#define MKSTR_U_INT(v) lssproto_Ultoa( (unsigned long ) (v) )
lssproto_strcpysafe( lssproto.val_str , MKSTR_U_INT(i) , lssproto.workbufsize );
lssproto_strcatsafe( lssproto.val_str ," " , lssproto.workbufsize );
return lssproto.val_str;
}
char*lssproto_mkstr_long( long l )
{
#define MKSTR_LONG(v) lssproto_Ltoa( v )
lssproto_strcpysafe( lssproto.val_str , MKSTR_LONG(l) , lssproto.workbufsize );
lssproto_strcatsafe( lssproto.val_str ," " , lssproto.workbufsize );
return lssproto.val_str;
}
char*lssproto_mkstr_u_long( unsigned long l )
{
#define MKSTR_U_LONG(v) lssproto_Ultoa(v )
lssproto_strcpysafe( lssproto.val_str , MKSTR_U_LONG(l) , lssproto.workbufsize );
lssproto_strcatsafe( lssproto.val_str ," " , lssproto.workbufsize );
return lssproto.val_str;
}
char*lssproto_mkstr_short( short s )
{
#define MKSTR_SHORT16(v) lssproto_Ltoa( (long)((int)(v) ))
lssproto_strcpysafe( lssproto.val_str , MKSTR_SHORT16(s) , lssproto.workbufsize );
lssproto_strcatsafe( lssproto.val_str ," " , lssproto.workbufsize );
return lssproto.val_str;
}
char*lssproto_mkstr_u_short( short s )
{
#define MKSTR_U_SHORT16(v) lssproto_Ltoa( (long)( ((long)(v)) & 0xffff ))
lssproto_strcpysafe( lssproto.val_str , MKSTR_U_SHORT16(s) , lssproto.workbufsize );
lssproto_strcatsafe( lssproto.val_str ," " , lssproto.workbufsize );
return lssproto.val_str;
}
char*lssproto_mkstr_char( char c )
{
#define MKSTR_CHAR8(v) lssproto_Ltoa( ( long)((int)(v)))
lssproto_strcpysafe( lssproto.val_str , MKSTR_CHAR8(c) , lssproto.workbufsize );
lssproto_strcatsafe( lssproto.val_str ," ", lssproto.workbufsize );
return lssproto.val_str;
}
char*lssproto_mkstr_u_char( char c)
{
#define MKSTR_U_CHAR8(v) lssproto_Ltoa( (long)( ((long)(v)) & 0xff ))
lssproto_strcpysafe( lssproto.val_str , MKSTR_U_CHAR8(c) , lssproto.workbufsize );
lssproto_strcatsafe( lssproto.val_str ," " , lssproto.workbufsize );
return lssproto.val_str;
}
char*lssproto_mkstr_string( char*a )
{
char *ret = lssproto_escapeString( a );
lssproto_strcatsafe( ret , " ", lssproto.workbufsize );
return ret;
}
char*lssproto_mkstr_float(float f )
{
sprintf( lssproto.val_str , "%f " , f );
return lssproto.val_str;
}
char*lssproto_mkstr_double( double d )
{
sprintf( lssproto.val_str , "%f " , d );
return lssproto.val_str;
}
char*lssproto_mkstr_int_array( int size , int *array )
{
#define MKSTR_ARRAYMACRO( func) \
{\
int i;\
lssproto.arraywork[0] = '\0';\
for(i=0;i<size;i++){ \
lssproto_strcatsafe( lssproto.arraywork , func(array[i]) , lssproto.workbufsize );\
}\
return lssproto.arraywork;\
}\
MKSTR_ARRAYMACRO( lssproto_mkstr_int );
}
char*lssproto_mkstr_u_int_array( int size , int *array )
{
MKSTR_ARRAYMACRO( lssproto_mkstr_u_int );
}
char*lssproto_mkstr_short_array( int size , short *array )
{
MKSTR_ARRAYMACRO( lssproto_mkstr_short );
}
char*lssproto_mkstr_u_short_array( int size , short *array )
{
MKSTR_ARRAYMACRO( lssproto_mkstr_u_short );
}
char *lssproto_mkstr_char_array( int size , char *array )
{
MKSTR_ARRAYMACRO( lssproto_mkstr_char );
}
char *lssproto_mkstr_u_char_array( int size , unsigned char *array )
{
MKSTR_ARRAYMACRO( lssproto_mkstr_u_char );
}
char *lssproto_mkstr_float_array( int size , float *array )
{
MKSTR_ARRAYMACRO( lssproto_mkstr_float );
}
char *lssproto_mkstr_double_array( int size , double *array )
{
MKSTR_ARRAYMACRO( lssproto_mkstr_double );
}
/*********************
translate string into base types
*********************/
int lssproto_demkstr_int( char*a )
{
if( a == (char*)NULL)return 0;
/* return (int)strtol( a ,NULL , 10);*/
return lssproto_a62toi( a );
}
unsigned int lssproto_demkstr_u_int( char*a )
{
if( a == (char*)NULL)return 0;
return (unsigned int ) strtoul( a ,NULL,10);
}
long lssproto_demkstr_long( char*a )
{
if( a == (char*)NULL)return 0;
return (long)strtol( a , NULL , 10 );
}
unsigned long lssproto_demkstr_u_long(char*a )
{
if( a == (char*)NULL)return 0;
return (unsigned long ) strtoul( a , NULL , 10 ) ;
}
short lssproto_demkstr_short( char*a )
{
if( a == (char*)NULL)return 0;
return (short) strtol( a , NULL , 10 );
}
unsigned short lssproto_demkstr_u_short( char*a )
{
if( a == (char*)NULL)return 0;
return (unsigned short) strtoul( a , NULL , 10 );
}
char lssproto_demkstr_char( char*a )
{
if( a == (char*)NULL)return 0;
return (char) strtol( a , NULL , 10 );
}
unsigned char lssproto_demkstr_u_char( char*a )
{
if( a == (char*)NULL)return 0;
return (unsigned char ) strtoul( a,NULL , 10 );
}
float lssproto_demkstr_float( char*a )
{
if( a == (char*)NULL)return 0.0F;
return (float) atof( a);
}
double lssproto_demkstr_double(char*a )
{
if( a == (char*)NULL)return 0.0F;
return (double) strtod( a , NULL );
}
char* lssproto_demkstr_string( char*a)
{
if( a == (char*)NULL){
lssproto_strcpysafe( lssproto.escapework , "" , lssproto.workbufsize );
return lssproto.escapework;
}
return lssproto_descapeString( a );
}
int *lssproto_demkstr_int_array( char**tk ,int *buf ,int start , int size )
{
#define DEMKSTR_ARRAYMACRO( func, defaultvalue ) \
{\
int i;\
for(i=start;i<(start+size);i++){\
if( tk[i] == NULL ){ \
buf[i-start]=defaultvalue ;\
} else {\
buf[i-start] = func( tk[i] );\
}\
}\
return buf;\
}
DEMKSTR_ARRAYMACRO( lssproto_demkstr_int , 0 );
}
int *lssproto_demkstr_u_int_array( char **tk , int *buf , int start , int size )
{
DEMKSTR_ARRAYMACRO( lssproto_demkstr_u_int , 0 );
}
unsigned int *lssproto_demkstr_long_array(
char **tk , unsigned int *buf , int start , int size )
{
DEMKSTR_ARRAYMACRO( lssproto_demkstr_long , 0);
}
unsigned long *lssproto_demkstr_u_long_array(
char **tk , unsigned long *buf , int start , int size )
{
DEMKSTR_ARRAYMACRO( lssproto_demkstr_u_long , 0);
}
short *lssproto_demkstr_short_array( char **tk , short *buf , int start , int size )
{
DEMKSTR_ARRAYMACRO( lssproto_demkstr_short , 0);
}
unsigned short* lssproto_demkstr_u_short_array(
char **tk , unsigned short *buf , int start , int size )
{
DEMKSTR_ARRAYMACRO( lssproto_demkstr_u_short , 0);
}
char *lssproto_demkstr_char_array( char **tk , char *buf , int start , int size )
{
DEMKSTR_ARRAYMACRO( lssproto_demkstr_u_char , 0);
}
unsigned char *lssproto_demkstr_u_char_array(
char **tk , unsigned char*buf , int start , int size )
{
DEMKSTR_ARRAYMACRO( lssproto_demkstr_u_char , 0);
}
float *lssproto_demkstr_float_array( char **tk , float *buf , int start , int size )
{
DEMKSTR_ARRAYMACRO( lssproto_demkstr_float , (float)0.0);
}
double *lssproto_demkstr_u_double_array( char **tk , double *buf , int start , int size )
{
DEMKSTR_ARRAYMACRO( lssproto_demkstr_double , (double)0.0);
}
char* lssproto_escapeString( char*a )
{
int i,c=0;
lssproto.escapework[0] = '\0';
for(i=0;;i++){
if( a[i] == '\0' ){
lssproto.escapework[c++] = '\0';
break;
} else if( ( char )0x80 <= a[i] && a[i] <= ( char )0xFF ){
// for 2 Byte Word
lssproto.escapework[c++] = a[i++];
lssproto.escapework[c++] = a[i];
} else if( a[i] == '\\' ){
lssproto.escapework[c++] = '\\';
lssproto.escapework[c++] = '\\';
} else if( a[i] == ' ' ){
lssproto.escapework[c++] = '\\';
lssproto.escapework[c++] = 'S';
} else if( a[i] == '\n' ){
lssproto.escapework[c++] = '\\';
lssproto.escapework[c++] = 'n';
} else if( a[i] == '\r' ){
lssproto.escapework[c++] = '\\';
lssproto.escapework[c++] = 'r';
} else {
lssproto.escapework[c++] = a[i];
}
}
return lssproto.escapework;
}
char* lssproto_descapeString( char*a )
{
int i ,c =0;
lssproto.escapework[0] = '\0';
for(i=0;;i++){
if( a[i] == '\0' ){
lssproto.escapework[c++]='\0';
break;
} else if( (char)0x80 <= a[i] && a[i] <= (char)0xFF ){
// for 2 Byte Word
lssproto.escapework[c++] = a[i++];
lssproto.escapework[c++] = a[i];
} else if( a[i] == '\\' ){
if( a[i+1] == 0 ){ /* null */
lssproto.escapework[c++] = a[i];
continue;
}
if( a[i+1] == 'S' ){ /* space */
lssproto.escapework[c++] = ' ';
} else if( a[i+1] == 'n' ){
lssproto.escapework[c++] = '\n';
} else if( a[i+1] == 'r' ){
lssproto.escapework[c++] = '\r';
} else if( a[i+1] == '\\' ){
lssproto.escapework[c++] = '\\';
} else {
lssproto.escapework[c++] = a[i];
}
i++;
} else {
lssproto.escapework[c++] = a[i];
}
}
return lssproto.escapework;
}
/*
This function works only when char*src is escaped
NOTICE: Effects and Modifies the contents of char*src!
NOTICE : Ends the output token list with NULL pointer
Ex:
v out[0] v out[1]
" asdjfhasfdasdf asdf asf asdf "
*/
#ifdef lssproto__ENCRYPT
static void lssproto_decodeString( char *src , char *out );
static void lssproto_encodeString( char *src , char *out , int maxoutlen );
#endif
void lssproto_splitString( char *src )
{
int i,c=0;
char *decoded;
#ifdef lssproto__ENCRYPT
decoded = lssproto.cryptwork;
lssproto_decodeString( src , decoded );
#else
decoded = src;
#endif
if( lssproto_readlogfilename[0] != '\0'){
FILE *rfp;
rfp = fopen( lssproto_readlogfilename , "a+" );
if(rfp)fprintf( rfp, "%s\n",decoded );
if(rfp)fclose(rfp);
}
for(i = 0 ; ; i++ ){
if( decoded[i] == '\0' ) break;
if( i==0){
lssproto.token_list[c++]=&(decoded[i]);
}
if( decoded[i]== ' '){
lssproto.token_list[c++]=&(decoded[i+1]);
}
}
while( *decoded ){
if( ( *decoded ) == ' ' || (*decoded ) == '\n' || (*decoded ) == '\r' ) *decoded = '\0';
decoded++;
}
lssproto.token_list[c] = (char*)NULL;
}
int lssproto_default_write_wrap( int fd , char *buf , int size )
{
#ifndef WIN32
return write( fd , buf , size );
#else
return 0;
#endif
}
void lssproto_consumeLine(char *buf , int offset )
{
int i;
int shift=0;
buf+= offset;
for(i=0;;i++){
if( buf[i] == '\n' ){
shift = i + 1;
break;
}
}
if( shift == 0 )return;
for(i=shift;;i++){
buf[i - shift] = buf[i];
if( buf[i] == '\0')break;
}
}
void lssproto_copyLine( char*src , char *out , int outlen )
{
int i;
for(i=0;;i++){
out[i] = src[i];
if( src[i] == '\n' ){
out[i+1] = '\0' ;
return;
}
if( src[i] == '\0' )return;
}
lssproto_strcpysafe( out , "" , outlen );
}
unsigned int lssproto_GetNewMessageID(void)
{
return lssproto.message_id++;
}
/*****************
WRITE
int flg : if 1, actually write. Otherwise no Network access
*****************/
void lssproto_DebugSend( int fd , char *msg )
{
lssproto_Send( fd, msg );
}
void lssproto_Send( int fd , char *msg )
{
char *encoded;
if( lssproto_writelogfilename[0] != '\0' ){
FILE *wfp = fopen( lssproto_writelogfilename , "a+" );
if(wfp)fprintf( wfp , "%s\n", msg );
if(wfp)fclose(wfp);
}
#ifdef lssproto__ENCRYPT
encoded = lssproto.cryptwork;
lssproto_encodeString( msg , encoded , lssproto.workbufsize*3 );
#else
encoded = msg;
#endif
{
/* add a newline character*/
unsigned int l = strlen( encoded );
if( l < lssproto.workbufsize *3){
encoded[l] = '\n';
encoded[l+1] = 0;
l++;
}
else
{
print("\n lssproto.workbufsize:%d len:%d ", lssproto.workbufsize, l);
}
lssproto.write_func( fd , encoded , l);
}
}
/****************
create a header which has function name and new Message ID
****************/
void lssproto_CreateHeader( char *out ,char *fname )
{
sprintf( out ,"%u %s " , lssproto_GetNewMessageID() , fname );
}
void lssproto_CreateHeaderID( char *out,unsigned long msgid , char *fname )
{
sprintf( out ,"%u %s " , (unsigned int)msgid , fname );
}
char *lssproto_Ltoa( long v )
{
static char _ltoa_out[64];
lssproto_cnv10to62( (int)v , _ltoa_out , sizeof( _ltoa_out ));
/* sprintf( _ltoa_out , "%d" , (int)v );*/
return _ltoa_out;
}
char *lssproto_Ultoa( unsigned long v )
{
static char _ultoa_out[64];
sprintf( _ultoa_out , "%u" , (unsigned int)v );
return _ultoa_out;
}
/****************
string address wrapper
****************/
char *lssproto_wrapStringAddr( char *copy , int maxcopylen , char*src )
{
lssproto_strcpysafe( copy , src , maxcopylen );
return copy;
}
/***************
bzero buffer ( some OSs like win32 don't have bzero )
***************/
void lssproto_bzero( char *b , int siz )
{
unsigned int i;
int *p;
p = (int*)b;
for(i=0;i<siz/sizeof(int);i++) {
*(p+i)=0;
}
for(i=0;i<siz%sizeof(int);i++) {
*(b+siz-1-i)=0;
}
}
/***************
copy buffer
***************/
void lssproto_bcopy(char*s , char *d , int siz )
{
unsigned int i;
int *ps,*pd;
ps = (int*)s;
pd = (int*)d;
for(i=0;i<siz/sizeof(int);i++) {
*(pd+i) = *(ps+i);
}
for(i=0;i<siz%sizeof(int);i++) {
*(d+siz-1-i)=*(s+siz-1-i);
}
}
//#define JENCODE_KEY 9932
int JENCODE_KEY=9922;
#ifdef lssproto__ENCRYPT
/* define function body only if the macro is set( but it's default) */
static void lssproto_encode64( unsigned char *in , int i, unsigned char *out );
static int lssproto_decode64( unsigned char *in , unsigned char *out );
static void lssproto_jDecode(char *src,int srclen,int key,char *decoded,int *decodedlen);
static void lssproto_jEncode(char *src,int srclen,int key,char *encoded,int *encodedlen,int maxencodedlen);
/* translate original lsrpc text to code64 text */
static void lssproto_encodeString( char *src , char *out , int maxoutlen )
{
int jencodedlen=0;
long compressed_l = 0;
int srclen = strlen( src ) + 1;
int flag=srclen;
if( srclen < 100 ){
if( (int)srclen > (int)( lssproto.workbufsize*3-2) ){
fprintf( stderr, "lsgen: badly configured work buflen\n" );
exit(1);
}
if( (flag%2) == 1 ) flag ++;
lssproto.compresswork[0] = flag;
memcpy( lssproto.compresswork+1,src,srclen );
compressed_l = srclen + 1;
} else {
if((flag%2)==0)flag++;
lssproto.compresswork[0] = flag;
compressed_l = lssproto_ringoCompressor(
(unsigned char*)lssproto.compresswork + 1 ,
(long)lssproto.workbufsize*3 - 1,
(unsigned char*)src ,
(long)strlen(src) ) + 1; /* be careful! */
}
/* return empty line if error or buffer excess */
if( compressed_l <= 0 ){
lssproto_strcpysafe( out , "\n" , maxoutlen );
return;
}
memcpy( lssproto.jencodecopy ,lssproto.compresswork ,compressed_l );
lssproto_jEncode( lssproto.jencodecopy , compressed_l , JENCODE_KEY ,
lssproto.jencodeout, &jencodedlen , lssproto.workbufsize*3 -1 );
lssproto_encode64( (unsigned char*)lssproto.jencodeout , jencodedlen, (unsigned char*)out );
}
/* translate code64 text to original lsrpc text */
static void lssproto_decodeString( char *src , char *out )
{
int compressed_l =0, outlen64;
int l;
long decompressed_l = 0;
/* copy src to copybuffer because jencoder modifies the input buffer */
l = strlen( src );
if( src[l-1]=='\n' || src[l-1]=='\r' )src[l-1]=0;
if( src[l-2]=='\n' || src[l-2]=='\r' )src[l-2]=0;
outlen64 = lssproto_decode64( (unsigned char*)src , (unsigned char*)lssproto.jencodecopy );
lssproto_jDecode( lssproto.jencodecopy , outlen64 , JENCODE_KEY,
lssproto.compresswork , &compressed_l);
/*out[outlen]=0; PENDING*/
if( (lssproto.compresswork[0] % 2 ) == 0 ){
if( compressed_l <= 0 ){
decompressed_l = 0;
fprintf( stderr, "LSRPC: too short:[%s]\n", src );
} else {
memcpy( out, lssproto.compresswork+1, compressed_l -1 );
decompressed_l = compressed_l -1;
}
} else {
decompressed_l =
lssproto_ringoDecompressor( (unsigned char*)out ,
(long)lssproto.workbufsize ,
(unsigned char*)lssproto.compresswork+1 ,
(long)compressed_l -1 );
}
out[decompressed_l] = 0;
}
/* followings are taken from code64.c */
char lssproto_charset[64]={
'A','B','C','D', 'E','F','G','H',
'I','J','K','L', 'M','N','O','P',
'Q','R','S','T', 'U','V','W','X',
'Y','Z','a','b', 'c','d','e','f',
'g','h','i','j', 'k','l','m','n',
'o','p','q','r', 's','t','u','v',
'w','x','y','z', '0','1','2','3',
'4','5','6','7', '8','9','+','-'
};
char lssproto_reversecharset[256]={
0,0,0,0, 0,0,0,0,
0,0,0,0, 0,0,0,0,
0,0,0,0, 0,0,0,0,
0,0,0,0, 0,0,0,0,
0,0,0,0, 0,0,0,0,
0,0,0,62, 0,63,0,0,
52,53,54,55, 56,57,58,59,
60,61,0,0, 0,0,0,0,
0,0,1,2, 3,4,5,6,
7,8,9,10, 11,12,13,14,
15,16,17,18, 19,20,21,22,
23,24,25,0, 0,0,0,0,
0,26,27,28, 29,30,31,32,
33,34,35,36, 37,38,39,40,
41,42,43,44, 45,46,47,48,
49,50,51,0, 0,0,0,0,
0,0,0,0, 0,0,0,0,
0,0,0,0, 0,0,0,0,
0,0,0,0, 0,0,0,0,
0,0,0,0, 0,0,0,0,
0,0,0,0, 0,0,0,0,
0,0,0,0, 0,0,0,0,
0,0,0,0, 0,0,0,0,
0,0,0,0, 0,0,0,0,
0,0,0,0, 0,0,0,0,
0,0,0,0, 0,0,0,0,
0,0,0,0, 0,0,0,0,
0,0,0,0, 0,0,0,0,
0,0,0,0, 0,0,0,0,
0,0,0,0, 0,0,0,0,
0,0,0,0, 0,0,0,0,
0,0,0,0, 0,0,0,0
};
static void lssproto_encode64( unsigned char *in , int len , unsigned char *out )
{
int i;
int use_bytes;
int address = 0;
out[0] = 0;
for(i=0;;i+=3){
unsigned char in1 , in2 , in3;
unsigned char out1 ,out2 , out3 , out4;
if( i >= len ) break;
if( i >= (len-1)){ /* the last letter ( to be thrown away ) */
in1 = in[i] & 0xff;
in2 = in3 = 0;
use_bytes = 2;
} else if( i >= (len-2)){ /* the last 2 letters ( process only 1 byte)*/
in1 = in[i] & 0xff;
in2 = in[i+1] & 0xff;
in3 = 0;
use_bytes = 3;
} else { /* there are more or equal than 3 letters */
in1 = in[i] & 0xff;
in2 = in[i+1] & 0xff;
in3 = in[i+2] & 0xff;
use_bytes = 4;
}
out1 = ((in1 & 0xfc)>>2) & 0x3f;
out2 = ((in1 & 0x03)<<4) | ((( in2 & 0xf0)>>4)&0x0f);
out3 = ((in2 & 0x0f)<<2) | ((( in3 & 0xc0)>>6)&0x03);
out4 = (in3 & 0x3f );
if( use_bytes >= 2 ){
out[address++] = lssproto_charset[out1];
out[address++] = lssproto_charset[out2];
out[address]=0;
}
if( use_bytes >= 3 ){
out[address++] = lssproto_charset[out3];
out[address]=0;
}
if( use_bytes >= 4 ){
out[address++] = lssproto_charset[out4];
out[address]=0;
}
}
}
/*
* Decode it
* char *in : encoded ascii chars
* char *out : decoded( output)
* return value : output byte count
*
* note: no need to have bigger buffer. because output is to
* be smaller than input string size
*/
static int lssproto_decode64( unsigned char *in , unsigned char *out )
{
unsigned char in1 , in2 , in3 , in4;
unsigned char out1 , out2 , out3;
int use_bytes;
int address= 0;
int i;
for(i=0;;i+=4 ){
if( in[i] == 0 ){
break;
} else if( in[i+1] == 0 ){ /* the last letter */
break;
} else if( in[i+2] == 0 ){ /* the last 2 letters */
in1 = lssproto_reversecharset[in[i]];
in2 = lssproto_reversecharset[in[i+1]];
in3 = in4 = 0;
use_bytes = 1;
} else if( in[i+3] == 0 ){ /* the last 3 letters */
in1 = lssproto_reversecharset[in[i]];
in2 = lssproto_reversecharset[in[i+1]];
in3 = lssproto_reversecharset[in[i+2]];
in4 = 0;
use_bytes = 2;
} else { /* process 4 letters */
in1 = lssproto_reversecharset[in[i]];
in2 = lssproto_reversecharset[in[i+1]];
in3 = lssproto_reversecharset[in[i+2]];
in4 = lssproto_reversecharset[in[i+3]];
use_bytes = 3;
}
out1 = (in1<<2) | (((in2 & 0x30)>>4)&0x0f) ;
out2 = ((in2 & 0x0f )<<4) | ((( in3 & 0x3c)>>2)&0x0f);
out3 = ( (in3 &0x03)<<6) | ( in4 & 0x3f );
if( use_bytes >= 1 ){
out[address++] = out1;
}
if( use_bytes >= 2 ){
out[address++] = out2;
}
if( use_bytes >= 3 ){
out[address++] = out3;
}
if( use_bytes != 3 ){
break;
}
}
return address;
}
/* followings are taken from Jencode.c by jun */
static void lssproto_jEncode(char *src,int srclen,int key,char *encoded,int *encodedlen,int maxencodedlen)
{
char sum=0;
int i;
if(srclen+1 > maxencodedlen){
*encodedlen = maxencodedlen;
for(i=0;i<(*encodedlen);i++)encoded[i] = src[i];
}
if(srclen+1 <= maxencodedlen){
*encodedlen=srclen+1;
for(i=0;i<srclen;i++){
sum = sum + src[i];
if(((key%7) == (i%5))||((key%2) == (i%2))) src[i] = ~src[i];
}
for(i=0;i<(*encodedlen);i++){
if(abs((key%srclen)) > i) encoded[i] = src[i] + sum*((i*i)%3);
if(abs((key%srclen)) == i) encoded[i] = sum;
if(abs((key%srclen)) < i) encoded[i] = src[i-1] + sum*((i*i)%7);
}
}
}
static void lssproto_jDecode(char *src,int srclen,int key,char *decoded,int *decodedlen)
{
char sum=0;
int i;
*decodedlen=srclen-1;
if( *decodedlen == 0 ){
return; /* return error if length is 0 */
}
sum = src[abs(key%(*decodedlen))];
for(i=0;i<srclen;i++){
if(abs((key%(*decodedlen))) > i) decoded[i] = src[i] - sum*((i*i)%3);
if(abs((key%(*decodedlen))) < i) decoded[i-1] = src[i] - sum*((i*i)%7);
}
for(i=0;i<(*decodedlen);i++){
if(((key%7) == (i%5))||((key%2) == (i%2)))decoded[i] = ~decoded[i];
}
}
/*****************************************************************/
/* Compress / Decompress routine */
/*****************************************************************/
#define B00000000 0
#define B00000001 1
#define B00000010 2
#define B00000011 3
#define B00000100 4
#define B00000101 5
#define B00000110 6
#define B00000111 7
#define B00001000 8
#define B00001001 9
#define B00001010 10
#define B00001011 11
#define B00001100 12
#define B00001101 13
#define B00001110 14
#define B00001111 15
#define B00010000 16
#define B00010001 17
#define B00010010 18
#define B00010011 19
#define B00010100 20
#define B00010101 21
#define B00010110 22
#define B00010111 23
#define B00011000 24
#define B00011001 25
#define B00011010 26
#define B00011011 27
#define B00011100 28
#define B00011101 29
#define B00011110 30
#define B00011111 31
#define B00100000 32
#define B00100001 33
#define B00100010 34
#define B00100011 35
#define B00100100 36
#define B00100101 37
#define B00100110 38
#define B00100111 39
#define B00101000 40
#define B00101001 41
#define B00101010 42
#define B00101011 43
#define B00101100 44
#define B00101101 45
#define B00101110 46
#define B00101111 47
#define B00110000 48
#define B00110001 49
#define B00110010 50
#define B00110011 51
#define B00110100 52
#define B00110101 53
#define B00110110 54
#define B00110111 55
#define B00111000 56
#define B00111001 57
#define B00111010 58
#define B00111011 59
#define B00111100 60
#define B00111101 61
#define B00111110 62
#define B00111111 63
#define B01000000 64
#define B01000001 65
#define B01000010 66
#define B01000011 67
#define B01000100 68
#define B01000101 69
#define B01000110 70
#define B01000111 71
#define B01001000 72
#define B01001001 73
#define B01001010 74
#define B01001011 75
#define B01001100 76
#define B01001101 77
#define B01001110 78
#define B01001111 79
#define B01010000 80
#define B01010001 81
#define B01010010 82
#define B01010011 83
#define B01010100 84
#define B01010101 85
#define B01010110 86
#define B01010111 87
#define B01011000 88
#define B01011001 89
#define B01011010 90
#define B01011011 91
#define B01011100 92
#define B01011101 93
#define B01011110 94
#define B01011111 95
#define B01100000 96
#define B01100001 97
#define B01100010 98
#define B01100011 99
#define B01100100 100
#define B01100101 101
#define B01100110 102
#define B01100111 103
#define B01101000 104
#define B01101001 105
#define B01101010 106
#define B01101011 107
#define B01101100 108
#define B01101101 109
#define B01101110 110
#define B01101111 111
#define B01110000 112
#define B01110001 113
#define B01110010 114
#define B01110011 115
#define B01110100 116
#define B01110101 117
#define B01110110 118
#define B01110111 119
#define B01111000 120
#define B01111001 121
#define B01111010 122
#define B01111011 123
#define B01111100 124
#define B01111101 125
#define B01111110 126
#define B01111111 127
#define B10000000 128
#define B10000001 129
#define B10000010 130
#define B10000011 131
#define B10000100 132
#define B10000101 133
#define B10000110 134
#define B10000111 135
#define B10001000 136