I'm not sure I understand your line of thinking, OP.
Do you believe Multibit's authors purposely inserted bugs in the software to prevent users from accessing their own wallets?

I discovered Multibit last year only and I'm curious since I've been researching various approaches to help a friend recover his BTC from Multibit 0.5.18.

I ended up succeeding using scripts to bypass Multibit altogether.
Personally, I don't know if Multibit author's intentions were malicious or not.
What I know is this:
- the BTC were still in the wallet and there had been no transaction since the 3 original ones from 2014 and 2015. If their goal was to steal, they didn't succeed.
- my friend told me that the password I discovered was based on one of his old personal passwords
- BUT the working password had some unreadable unicode characters in it, the kind he wouldn't even know how to type on a keyboard (would require ALT+[XYZ] to generate on Windows)
- when I tried pasting the working password inside Multibit's UI input field (including the unicode characters), as a regular user would to export the private keys, I still got this message:


Not sure I'm being clear, here's a screenshot:
https://imgur.com/a/4E3rDZY

So at the moment, I do believe Multibit 0.5.18 stores user passwords in a flawed way, preventing users to access their wallet even with the correct password.

You're not in this boat alone. I hope it helps you move on or try a new approach.

Good luck.

I have wallets created with Multibit Classic (specifically, v0.5.14).

Shortly after creating my wallets, I added passwords to them. Later, on one wallet, I changed the password.

Flash forward some years and these wallets do not unlock even though I am 1000% using the correct password.

When I compare these wallets to other Multibit wallets (without passwords) by File Size, they are much smaller.

When I attempt to unlock these wallets with the correct password I receive the error "Provided AES key is wrong" whereas all other strings return "Could not decrypt bytes"

Since the software can distinguish between a correct and incorrect password yet cannot make sense of the contents, I can only conclude that this means the wallet is corrupted, and that the corruption occurred in the encryption process and not on the filesystem afterwards. I have tested HardCorePawn's utility on GitHub (https://github.com/HardCorePawn/multibit_recovery) and similarly I receive different output when entering the correct password, proving that the password is right, but the contents are corrupt.

This is a very big deal. We're likely talking about an eventual 100's of millions if not billions of dollars in BTC between all the Multibit users who will have been struck by this issue, many of whom probably still hold out hope of one day 'cracking that password'... not knowing it isn't the password that is the problem.

I'm looking at broken software that corrupts precisely the wallets you most want to protect, simply by using the software as was intended. And as a modest person and true believer, I trusted that one day I'd be able to come back to those wallets, but now I see.

My question is, what now?

This is a pretty gutt-wrenching thing, my heart goes out to everyone else facing the same. I just hate the feeling of 'well, that's it, there's nothing I can do'...

Hi

My wallets have just disappeared after I have restarted my Mac yesterday.
I have saved the wallets however I did not export the keys nor encrypted them.
Now when I am trying to open a one of them (say #07) I am getting this message:

Opening wallet "/Users/media/Desktop/CV/#08-20130630223650.wallet"...
... done.
Opening wallet "/Users/media/Desktop/CV/#09.wallet"...
... done.
Opening wallet "/Users/media/Desktop/CV/#10.wallet"...
... done.
Synchronised with network.
Opening wallet "/Users/media/Desktop/CV/#07-20130630223650.wallet"...
Could not load the wallet file "/Users/media/Desktop/CV/#07-20130630223650.wallet".
The error message was "com.google.protobuf.InvalidProtocolBufferException Protocol message tag had invalid wire type."

Has someone guys had a similar situation ? What is causing this ? Is there any chance to recover the wallet\get the private keys ?

Your help much appreciated

l3sny

Bitcoin, Bitcoin and stay with Bitcoin, because it's the safest for you as a beginner. If you can't do the research yourself, holding bitcoins is best. But if you've watched someone over the years make a good living with crypto, why don't you follow him and wake up now. You may be too afraid of risk to have more desire to get into crypto. Don't use minimal knowledge, you have to learn the basics of crypto and it needs to be done. Don't ask which crypto is good for investment, but ask yourself if you are ready with crypto and all the risks.

Bitcoin Client Software and Version Number: bitcoin wallet on android, ver 5.31, source code https://github.com/bitcoin-wallet/bitcoin-wallet (sorry idk if that's helpful)
Operating System: wallet is on my Samsung galaxy s7 edge
System Hardware Specs: n/a
Description of Problem: i lost my spending pin somehow and ran btc recover for 4-7 character pins (all numerical btw) to no avail. I'm guessing my pin is 8 digits or higher (I'm betting on 8 ) and I am having no luck finding help from even the wallet recovery services people who charge 20% of your total wallet. if anyone can help me I will reimburse you, I realize this is time consuming. thank you.

Hello guys!

I've forgotten my wallet password,but I remember most of it.

If anyone helps me I will give him whatever he wants,just help me!

and thanks a lot

I recently bought £1000 of bitcoins. I had no password on my wallet.

Whilst trying to transfer my wallet to a USB stick, something happened which I don't know exactly what, but my Wallet is now saying I have a password.

I can still view my wallet but I cannot transact because I have no clue of what the password is and you need that to do anything.

Please help... I know I can download programmes to try crack it but I don't know any part of the password
 which I've heard makes it almost impossible for it work in any reasonable amount of time

Any help from anyone with advice very welcome!!

So, title! Need help manipulating BitcoinJ's wallet object in order to dump the master private key of a MultibitHD Wallet. 0.1 BTC.

I have the wallet file and password. I would like to be able to get the BIP32 extended private key (xprv) from it.
Additionally, be able to derive it from the wallet seed. I can't figure out the derivation path.

This is as far as I've gotten:

What I do is restore a wallet and then try to get the private key from the Wallet object:

    NetworkParameters PARAMS = MainNetParams.get();
    DeterministicKeyChain kc = wallet.getActiveKeychain();
    DeterministicKey rk = kc.getRootKey();
    String key = rk.getPrivateKeyAsWiF(PARAMS);


I'm getting an exception saying java.lang.IllegalStateException: Private key bytes not available