1 files changed, 393 insertions, 0 deletions

diff --git a/tools/fwpatcher/iriver.c b/tools/fwpatcher/iriver.c
new file mode 100644
index 0000000000..e24df8c768
--- /dev/null
+++ b/tools/fwpatcher/iriver.c
@@ -0,0 +1,393 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2004 by Dave Hooper
+ *
+ * This particular source code file is licensed under the X11 license. See the
+ * bottom of the COPYING file for details on this license.
+ *
+ * Original code from http://www.beermex.com/@spc/ihpfirm.src.zip
+ * Details at http://www.rockbox.org/twiki/bin/view/Main/IriverToolsGuide
+ *
+ ****************************************************************************/
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "iriver.h"
+
+const unsigned char munge[] = {
+  0x7a, 0x36, 0xc4, 0x43, 0x49, 0x6b, 0x35, 0x4e, 0xa3, 0x46, 0x25, 0x84,
+  0x4d, 0x73, 0x74, 0x61
+};
+
+const unsigned char header_modify[] = "* IHPFIRM-DECODED ";
+
+const char * const models[] = { "iHP-100", "iHP-120/iHP-140", "H300 series",
+                                NULL };
+
+/* aligns with models array;  expected min firmware size */
+const unsigned int firmware_minsize[] = { 0x100000, 0x100000, 0x200000 };
+/* aligns with models array;  expected max firmware size */
+const unsigned int firmware_maxsize[] = { 0x200000, 0x200000, 0x400000 };
+
+const unsigned char header[][16] = {
+  { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 },
+  { 0x20, 0x03, 0x08, 0x27, 0x24, 0x00, 0x02, 0x30, 0x19, 0x17, 0x65, 0x73,
+    0x85, 0x32, 0x83, 0x22 },
+  { 0x20, 0x04, 0x03, 0x27, 0x20, 0x50, 0x01, 0x70, 0x80, 0x30, 0x80, 0x06,
+    0x30, 0x19, 0x17, 0x65 }
+};
+
+static int testheader( const unsigned char * const data )
+{
+    const unsigned char * const d = data+16;
+    const char * const * m = models;
+    int index = 0;
+    while( *m )
+    {
+        if( memcmp( header[ index ], d, 16 ) == 0 )
+            return index;
+        index++;
+        m++;
+    };
+    return -1;
+};
+
+static void modifyheader( unsigned char * data )
+{
+    const unsigned char * h = header_modify;
+    int i;
+    for( i=0; i<512; i++ )
+    {
+        if( *h == '\0' )
+            h = header_modify;
+        *data++ ^= *h++;
+    };
+};
+
+static FILE * openinfile( const TCHAR * filename )
+{
+    FILE * F = _tfopen( filename, TEXT("rb") );
+    if( F == NULL )
+    {
+        fprintf( stderr, "Couldn't open input file %s\n", filename );
+        perror( "Error was " );
+    };
+    return F;
+};
+
+static FILE * openoutfile( const TCHAR * filename )
+{
+    FILE * F = _tfopen( filename, TEXT("wb") );
+    if( F == NULL )
+    {
+        fprintf( stderr, "Couldn't open output file %s\n", filename );
+        perror( "Error was " );
+    };
+    return F;
+};
+
+int iriver_decode(TCHAR *infile_name, TCHAR *outfile_name, unsigned int 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);
+        if (!infile || !outfile) return -1;
+        
+    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" );
+        goto error;
+    };
+
+    i = testheader( headerdata );
+    if( i == -1 )
+    {
+        fprintf( stderr, "This firmware is for an unknown model, or is not"
+                 " a valid encrypted iHP firmware\n" );
+        goto error;
+    };
+    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" );
+                goto error;
+    };
+
+    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" );
+                goto error;
+    };
+
+    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!" );
+                        goto error;
+        };
+        ppChecksums += lenread;
+    };
+
+    if( fp != dwLength3 )
+    {
+        fprintf( stderr, "This doesn't look like a valid encrypted "
+                 "iHP firmware - reason: 'length3' mismatch\n" );
+                goto error;
+    };
+
+
+    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;
+    };
+
+        fclose(infile);
+        fclose(outfile);
+    return 0;
+error:
+        fclose(infile);
+        fclose(outfile);
+        return -1;
+};
+
+int iriver_encode(TCHAR *infile_name, TCHAR *outfile_name, unsigned int 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;
+
+    enum striptype stripmode = STRIP_NONE;
+
+    infile = openinfile(infile_name);
+    outfile = openoutfile(outfile_name);
+        if (!infile || !outfile) return -1;
+
+    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" );
+        goto error;
+    };
+
+    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" );
+        goto error;
+    };
+    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" );
+        goto error;
+    };
+
+    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" );
+        goto error;
+    };
+
+    /* 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" );
+        goto error;
+    };
+
+    fprintf( stderr, "File encoded successfully and checksum table built!\n" );
+
+        fclose(infile);
+        fclose(outfile);
+    return 0;
+error:
+        fclose(infile);
+        fclose(outfile);
+        return -1;
+};