Litecoin Wallet.dat corrupted and faild recovery by pywallet

My officemate have a wallet.dat (88kb 90112 byte content looks fine).
He is a rich and cleaver guy (*・ω・) . live in Shanghai and remenber password clearly.

The wallet file is the only one backup file.
I try for 8 hours But still faild.
Could any one hlep us? If your suggestion is useful .we will take a great thanks.

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If finnaly rescure his wallet then he would pay at less 1 Ltc for the “Savior”.

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- [ ] 1.Replace

C:\Users\Lin\AppData\Roaming\Litecoin with Error：

"wallet.dat corrupt,salvage failed"

- [ ] 2.salvagewallet

Useing

litecoin-qt.exe -salvagewallet

shows in debug.log

2017-12-15 15:02:47 Renamed wallet.dat to wallet.1513350167.bak
2017-12-15 15:02:47 CDBEnv::Salvage: Database salvage found errors, all data may not be recoverable.
2017-12-15 15:02:47 CDBEnv::Salvage: WARNING: Unexpected end of file while reading salvage output.
2017-12-15 15:02:47 Salvage(aggressive) found no records in wallet.1513350167.bak.
2017-12-15 15:02:47 scheduler thread interrupt
2017-12-15 15:02:47 Shutdown: In progress...
2017-12-15 15:02:47 Shutdown: done

shows in db.log

file unknown has LSN 1/172998, past end of log at 1/2305
Commonly caused by moving a database from one database environment
to another without clearing the database LSNs, or by removing all of
the log files from a database environment
wallet.1513350167.bak: DB_VERIFY_BAD: Database verification failed

- [ ] 3.Pywallet

Bitcointalk:Pywallet 2.2: manage your wallet Update required

Bitcointalk:Recovering LTC Wallet using Pywallet

I will paste question to bitcointalk later...Because,It say My IP is Evil╰_╯ .Please Let the staff member whitelist me.Or pay 0.00001397 Bitcoin to forum.

After installl python And Download pywallet

python pywallet.py --recover --recov_device wallet_recovery_88kb.dat --recov_size 1Gio --otherversion 48 --recov_outputdir C:\litecoin\recoveryOutput

return back with：

Starting recovery.
Read 0.0 Go in 0.0 minutes

Found 0 possible wallets
Found 0 possible encrypted keys
Found 0 possible unencrypted keys
The wallet is encrypted and the passphrase is correct


Importing:


The new wallet C:\litecoin\recoveryOutput/recovered_wallet_1513446785.dat contains the 0 recovered key

What! Zero?!

- [ ] 4.ASCII

It seems Nothing in it's file.But I think "pywallt can ONLY Find which are encrypted key (litecoin),It can't Find out unencrpted key(litecoin)"

I creat a new wallet ,pywallet find nothing.but after encrypt wallet.pywallet woks well (+﹏+)~ It really confused me.

And my Officemate's wallet looks not encrypted,but 90112 byte... same as new_ encrypted_wallet 90112 byte

Useing Ultraedit find out

NEW wallet litecoin_wallet_encrypted

27 00 01 04 63 6B 65 79 21 ; '...ckey!

My Officemate's wallet litecoin_wallet_NOT_encrypted

26 00 01 03 6B 65 79 21 ; &...key!

NEW wallet litecoin_wallet_NOT_encrypted

26 00 01 03 6B 65 79 21 ; &...key!

- [ ] 5.I have no alternative,let the pywallet working on NOT_encrypted wallet ,Or other toolkit.Big thanks.