void
setfile(int argc, char **argv) {
static char *nullstr = "-";
svargc = --argc;
svargv = argv;
while (svargc > 0 && svargv[1][0] == '-') {
switch (svargv[1][1]) {
case 'd': lefteq=svargv[1][2]; righteq=svargv[1][3]; break;
case 's': gsize = atof(&svargv[1][2]); break;
case 'p': deltaps = atof(&svargv[1][2]); break;
case 'f': gfont = svargv[1][2]; break;
case 'e': noeqn++; break;
case 'r': /*resolution = atoi(&svargv[1][2]);*/ break;
case 0: goto endargs;
default: dbg = 1;
}
svargc--;
svargv++;
}
endargs:
ifile = 1;
linect = 1;
if (svargc <= 0) {
curfile = stdin;
svargv[1] = nullstr;
}
else
openinfile(); /* opens up the first input file */
}
int main(int argc, char *argv[]) {
if (argc < 2) error(usage);
if (*argv[1] == '-') { debug = 1; --argc; ++argv; }
if (argc < 2) error(usage);
openinfile(argv[1]);
init();
if (!PROGRAM()) error("Syntax error");
fclose(inf);
return 0;
}
int
gtc(void) {
loop:
if (ip > ibuf)
return(*--ip); /* already present */
lastchar = getc(curfile);
if (lastchar=='\n')
linect++;
if (lastchar != EOF)
return(lastchar);
if (++ifile > svargc) {
return(EOF);
}
fclose(curfile);
linect = 1;
if (openinfile() == 0)
goto loop;
return(EOF);
}
int iriver_decode(const char *infile_name, const char *outfile_name, BOOL modify,
enum striptype stripmode )
{
FILE * infile = NULL;
FILE * outfile = NULL;
int i = -1;
unsigned char headerdata[512];
unsigned long dwLength1, dwLength2, dwLength3, fp = 0;
unsigned char blockdata[16+16];
unsigned char out[16];
unsigned char newmunge;
signed long lenread;
int s = 0;
unsigned char * pChecksums, * ppChecksums = 0;
unsigned char ck;
infile = openinfile(infile_name);
outfile = openoutfile(outfile_name);
lenread = fread( headerdata, 1, 512, infile );
if( lenread != 512 )
{
fprintf( stderr, "This doesn't look like a valid encrypted iHP "
"firmware - reason: header length\n" );
fclose(infile);
fclose(outfile);
return -1;
};
i = testheader( headerdata );
if( i == -1 )
{
fprintf( stderr, "This firmware is for an unknown model, or is not"
" a valid encrypted iHP firmware\n" );
fclose(infile);
fclose(outfile);
return -2;
};
fprintf( stderr, "Model %s\n", models[ i ] );
dwLength1 = headerdata[0] | (headerdata[1]<<8) |
(headerdata[2]<<16) | (headerdata[3]<<24);
dwLength2 = headerdata[4] | (headerdata[5]<<8) |
(headerdata[6]<<16) | (headerdata[7]<<24);
dwLength3 = headerdata[8] | (headerdata[9]<<8) |
(headerdata[10]<<16) | (headerdata[11]<<24);
if( dwLength1 < firmware_minsize[ i ] ||
dwLength1 > firmware_maxsize[ i ] ||
dwLength2 < firmware_minsize[ i ] ||
dwLength2 > dwLength1 ||
dwLength3 > dwLength1 ||
dwLength2>>9 != dwLength3 ||
dwLength2+dwLength3+512 != dwLength1 )
{
fprintf( stderr, "This doesn't look like a valid encrypted "
"iHP firmware - reason: file 'length' data\n" );
fclose(infile);
fclose(outfile);
return -3;
};
pChecksums = ppChecksums = (unsigned char *)( malloc( dwLength3 ) );
if( modify )
{
modifyheader( headerdata );
};
if( stripmode == STRIP_NONE )
fwrite( headerdata, 512, 1, outfile );
memset( blockdata, 0, 16 );
ck = 0;
while( ( fp < dwLength2 ) &&
( lenread = fread( blockdata+16, 1, 16, infile ) ) == 16 )
{
fp += 16;
for( i=0; i<16; ++i )
{
newmunge = blockdata[16+i] ^ munge[i];
out[i] = newmunge ^ blockdata[i];
blockdata[i] = newmunge;
ck += out[i];
}
if( fp > ESTF_SIZE || stripmode != STRIP_HEADER_CHECKSUM_ESTF )
{
fwrite( out+4, 1, 12, outfile );
fwrite( out, 1, 4, outfile );
}
else
{
if( ESTF_SIZE - fp < 16 )
{
memcpy( out+4, blockdata+16, 12 );
memcpy( out, blockdata+28, 4 );
fwrite( blockdata+16+ESTF_SIZE-fp, 1, ESTF_SIZE-fp, outfile );
}
}
if( s == 496 )
{
s = 0;
memset( blockdata, 0, 16 );
*ppChecksums++ = ck;
ck = 0;
}
else
s+=16;
};
if( fp != dwLength2 )
{
fprintf( stderr, "This doesn't look like a valid encrypted "
"iHP firmware - reason: 'length2' mismatch\n" );
fclose(infile);
fclose(outfile);
return -4;
};
fp = 0;
ppChecksums = pChecksums;
while( ( fp < dwLength3 ) &&
( lenread = fread( blockdata, 1, 32, infile ) ) > 0 )
{
fp += lenread;
if( stripmode == STRIP_NONE )
fwrite( blockdata, 1, lenread, outfile );
if( memcmp( ppChecksums, blockdata, lenread ) != 0 )
{
fprintf( stderr, "This doesn't look like a valid encrypted "
"iHP firmware - reason: Checksum mismatch!" );
fclose(infile);
fclose(outfile);
return -5;
};
ppChecksums += lenread;
};
if( fp != dwLength3 )
{
fprintf( stderr, "This doesn't look like a valid encrypted "
"iHP firmware - reason: 'length3' mismatch\n" );
fclose(infile);
fclose(outfile);
return -6;
};
fprintf( stderr, "File decoded correctly and all checksums matched!\n" );
switch( stripmode )
{
default:
case STRIP_NONE:
fprintf(stderr, "Output file contains all headers and "
"checksums\n");
break;
case STRIP_HEADER_CHECKSUM:
fprintf( stderr, "NB: output file contains only ESTFBINR header"
" and decoded firmware code\n" );
break;
case STRIP_HEADER_CHECKSUM_ESTF:
fprintf( stderr, "NB: output file contains only raw decoded "
"firmware code\n" );
break;
};
return 0;
}
int iriver_encode(const char *infile_name, const char *outfile_name, BOOL modify )
{
FILE * infile = NULL;
FILE * outfile = NULL;
int i = -1;
unsigned char headerdata[512];
unsigned long dwLength1, dwLength2, dwLength3, fp = 0;
unsigned char blockdata[16+16];
unsigned char out[16];
unsigned char newmunge;
signed long lenread;
int s = 0;
unsigned char * pChecksums, * ppChecksums;
unsigned char ck;
infile = openinfile(infile_name);
outfile = openoutfile(outfile_name);
lenread = fread( headerdata, 1, 512, infile );
if( lenread != 512 )
{
fprintf( stderr, "This doesn't look like a valid decoded "
"iHP firmware - reason: header length\n" );
fclose(infile);
fclose(outfile);
return -1;
};
if( modify )
{
modifyheader( headerdata ); /* reversible */
};
i = testheader( headerdata );
if( i == -1 )
{
fprintf( stderr, "This firmware is for an unknown model, or is not"
" a valid decoded iHP firmware\n" );
fclose(infile);
fclose(outfile);
return -2;
};
fprintf( stderr, "Model %s\n", models[ i ] );
dwLength1 = headerdata[0] | (headerdata[1]<<8) |
(headerdata[2]<<16) | (headerdata[3]<<24);
dwLength2 = headerdata[4] | (headerdata[5]<<8) |
(headerdata[6]<<16) | (headerdata[7]<<24);
dwLength3 = headerdata[8] | (headerdata[9]<<8) |
(headerdata[10]<<16) | (headerdata[11]<<24);
if( dwLength1 < firmware_minsize[i] ||
dwLength1 > firmware_maxsize[i] ||
dwLength2 < firmware_minsize[i] ||
dwLength2 > dwLength1 ||
dwLength3 > dwLength1 ||
dwLength2+dwLength3+512 != dwLength1 )
{
fprintf( stderr, "This doesn't look like a valid decoded iHP"
" firmware - reason: file 'length' data\n" );
fclose(infile);
fclose(outfile);
return -3;
};
pChecksums = ppChecksums = (unsigned char *)( malloc( dwLength3 ) );
fwrite( headerdata, 512, 1, outfile );
memset( blockdata, 0, 16 );
ck = 0;
while( ( fp < dwLength2 ) &&
( lenread = fread( blockdata+16, 1, 16, infile ) ) == 16 )
{
fp += 16;
for( i=0; i<16; ++i )
{
newmunge = blockdata[16+((12+i)&0xf)] ^ blockdata[i];
out[i] = newmunge ^ munge[i];
ck += blockdata[16+i];
blockdata[i] = newmunge;
};
fwrite( out, 1, 16, outfile );
if( s == 496 )
{
s = 0;
memset( blockdata, 0, 16 );
*ppChecksums++ = ck;
ck = 0;
}
else
s+=16;
};
if( fp != dwLength2 )
{
fprintf( stderr, "This doesn't look like a valid decoded "
"iHP firmware - reason: 'length1' mismatch\n" );
fclose(infile);
fclose(outfile);
return -4;
};
/* write out remainder w/out applying descrambler */
fp = 0;
lenread = dwLength3;
ppChecksums = pChecksums;
while( ( fp < dwLength3) &&
( lenread = fwrite( ppChecksums, 1, lenread, outfile ) ) > 0 )
{
fp += lenread;
ppChecksums += lenread;
lenread = dwLength3 - fp;
};
if( fp != dwLength3 )
{
fprintf( stderr, "This doesn't look like a valid decoded "
"iHP firmware - reason: 'length2' mismatch\n" );
fclose(infile);
fclose(outfile);
return -5;
};
fprintf( stderr, "File encoded successfully and checksum table built!\n" );
fclose(infile);
fclose(outfile);
return 0;
}
