2010-12-15 09:11:56 +01:00
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#ifndef NANDSPARE_H
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#define NANDSPARE_H
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//some class to handle the ecc & hmac data in the nandBin
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#include "includes.h"
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#include "sha1.h"
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class NandSpare
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{
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public:
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NandSpare();
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2011-05-17 20:36:33 +02:00
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void SetHMacKey( const QByteArray &key );
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QByteArray Get_hmac_data( const QByteArray &cluster, quint32 uid, const unsigned char *name, quint32 entry_n, quint32 x3, quint16 blk );
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QByteArray Get_hmac_meta( const QByteArray &cluster, quint16 super_blk );
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2010-12-15 09:11:56 +01:00
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2011-05-17 20:36:33 +02:00
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static QByteArray CalcEcc( const QByteArray &in );
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2010-12-15 09:11:56 +01:00
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static quint8 Parity( quint8 x );
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private:
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QByteArray hmacKey;
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};
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#endif // NANDSPARE_H
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/*
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spare data...
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0x40 bytes
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0x30 = hmac
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0x10 = ecc
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block 0 ( boot1 )
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all hmac is 0xffs
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all ecc is calc'd. after the first 9 pages, it works out to all 0s
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block 1 ( boot2v2 )
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all hmac is 0xff and then 0s
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block 2
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same as above until page 2
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starting at page 2, no ecc or hmac is written. its all 0xff
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spare data is only written for pages used, not on a cluster basis
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block 3 ( bootmii )
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same as block 1
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block 4
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same as above( hmac starts with 0xff then all 0s. after page2 cluster 2 all ecc works at to 0s as well )
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spare data is written for clusters used, not on a page basis
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block 5 ( never been used )
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all spare data is 0xffs, nothing is calculated
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block 6 ( boot2 copy )
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same as block 2
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block 7
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same as block 1
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super blocks
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hmac data is only on
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block ff1 cluster 7 page: 6 ( 3fc7e )
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block ff1 cluster 7 page: 7 ( 3fc7f )
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block ff3 cluster 7 page: 6 ( 3fcfe )
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block ff3 cluster 7 page: 7 ( 3fcff )
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block ff5 cluster 7 page: 6 ( 3fd7e )
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block ff5 cluster 7 page: 7 ( 3fd7f )
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block ff7 cluster 7 page: 6 ( 3fdfe )
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block ff7 cluster 7 page: 7 ( 3fdff )
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block ff9 cluster 7 page: 6 ( 3fe7e )
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block ff9 cluster 7 page: 7 ( 3fe7f )
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block ffb cluster 7 page: 6 ( 3fefe )
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block ffb cluster 7 page: 7 ( 3feff )
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block ffd cluster 7 page: 6 ( 3ff7e )
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block ffd cluster 7 page: 7 ( 3ff7f )
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block fff cluster 7 page: 6 ( 3fffe )
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block fff cluster 7 page: 7 ( 3ffff )
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*/
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