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Title: how to get the missing key? Post by: Sanka555 on April 19, 2021, 05:17:12 AM I am programming in Java (bitcoij library)
i have original line String="someline"; after transformations and encryptions i get correct 19SP2KEonvrYQAgk1yZ8ir9dDLq3SwXRP3 + key1 1APDCaHFRpRi8tzHgKnzfaW3rqsxJiqDjY + key2 its ok. and i do String segvit = SegwitAddress.fromKey(MainNetParams.get(), key).toBech32(); i get correct bc1qvmk80pd2uet0zdgf4sqjlumup7f68225esv2v2 how do i get key3? Title: Re: how to get the missing key? Post by: NotATether on April 19, 2021, 06:54:18 AM I'm assuming you want to get the bech32 address from the public key hash?
Then you just import the org.bitcoinj.core.SegwitAddress (https://bitcoinj.org/javadoc/0.15/org/bitcoinj/core/SegwitAddress.html) class and call its toBech32() method like this: Code: SegwitAddress segwitAddress = SegwitAddress.fromHash(MainNetParams.get(), hash160); Title: Re: how to get the missing key? Post by: Sanka555 on April 19, 2021, 07:17:32 AM Yes. that's what I do.
Quote key = ECKey.fromPrivate(bigInteger, true); String segvit = SegwitAddress.fromKey(MainNetParams.get(), key).toBech32(); And now I need a key to this address. The key, that I can enter into bitcoin core, and Core will give to me bc1qvmk80pd2uet0zdgf4sqjlumup7f68225esv2v2 if i use "key" from my code i get only 19SP2KEonvrYQAgk1yZ8ir9dDLq3SwXRP3 or 1APDCaHFRpRi8tzHgKnzfaW3rqsxJiqDjY Title: Re: how to get the missing key? Post by: NotATether on April 19, 2021, 08:01:13 AM Yes. that's what I do. Quote key = ECKey.fromPrivate(bigInteger, true); String segvit = SegwitAddress.fromKey(MainNetParams.get(), key).toBech32(); And now I need a key to this address. The key, that I can enter into bitcoin core, and Core will give to me bc1qvmk80pd2uet0zdgf4sqjlumup7f68225esv2v2 I'm having trouble following, do you want to: - Get the private key to this bech32 address, or - From the Bitcoin Core password, use it to find and decrypt this address in the wallet file? Title: Re: how to get the missing key? Post by: Sanka555 on April 19, 2021, 08:06:06 AM Get the private key to this bech32 address
Title: Re: how to get the missing key? Post by: NotATether on April 19, 2021, 08:33:59 AM Get the private key to this bech32 address You can't get the private key using only an address. However, if you also have the wallet.dat file, you can use a Berkeley DB library such as Oracle's (https://www.oracle.com/database/berkeley-db/java-edition.html) (free and OSS) to read all of the ckey (https://github.com/bitcoin/bitcoin/blob/83c715415a8886e3e46ef375e042f13d8165dabd/src/wallet/walletdb.cpp#L35) (encrypted private key) or key (https://github.com/bitcoin/bitcoin/blob/83c715415a8886e3e46ef375e042f13d8165dabd/src/wallet/walletdb.cpp#L42) (unencrypted) fields inside the database. Since the "ckey" fields are encrypted and need a complex process to decrypt them, let's assume you are reading an unencrypted wallet.dat, so "key" fields only. I'm guessing based on this post (https://bitcointalk.org/index.php?topic=5257844.msg54694553#msg54694553) and https://github.com/bitcoin/bitcoin/blob/master/src/wallet/walletdb.cpp#L102-L115 that the "key" field's key and record is Code: <length of id string > | key | <length> | <public key> and Code: <length of private key> | <private key> | <sha256 of private key> So you'd read each pair of these, and then run each public key through your BitcoinJ code above to get Bech32 addresses, and see which one matches "bc1qvmk80pd2uet0zdgf4sqjlumup7f68225esv2v2", and take its associated private key. Title: Re: how to get the missing key? Post by: Sanka555 on April 19, 2021, 08:46:14 AM sorry, probably my fault
English.. :-\ i am not a native speaker) i have string "blabla..." I use Java, myself, make a pair of address + key from a string. i make 2 pair. "compress" and "decompress" and i want make third pair - toBech32 but I can only get the address. I can not get the key to this address the key from which I am making the address (compressed) doesn't give me Bech32 if i enter this key into Core . He gives me "compressed" adress I do not need to extract and decrypt anything from wallet.dat I am trying to create an address myself Title: Re: how to get the missing key? Post by: NotATether on April 19, 2021, 09:04:08 AM i have string "blabla..." I use Java, myself, make a pair of address + key from a string. Ok, so you're using the string as random bytes to create the private key (basically a form of brainwallet). So in this case you should make the key first, using this string. And then the address. I have written about this in another post: You start with getting the private key. The double SHA256 hash of the password will give you that, and you can derive the public key from it as normal... In Java it translates to this: Code: import java.security.MessageDigest; Title: Re: how to get the missing key? Post by: Sanka555 on April 19, 2021, 10:25:37 AM i do it for "soslsoeoeo"
and i get bc1q7gmyvmrg2fwvyap46kztuqmg0ukvyanxcqctxl and key = L4iHGYsgeMW5HyGXhpuzvFjESsrSAaoReb6QqreZkfVuZjSUJ4AJ but if i give this key Electrum or https://www.blockchain.com/ wallet i dont get bc1q7gmyvmrg2fwvyap46kztuqmg0ukvyanxcqctxl i get 1KqcH1oRstqekPXbwhtikewr9XRXD4tXMs how can i get bc1q7gmyvmrg2fwvyap46kztuqmg0ukvyanxcqctxl in wallet?? what am I doing wrong? Thanks in advance for your patience :) Quote MessageDigest digest; try { digest = MessageDigest.getInstance("SHA-256"); byte[] hash = digest.digest(str.getBytes(StandardCharsets.UTF_8)); byte[] privatekey = digest.digest(hash); key = ECKey.fromPrivate(privatekey); byte[] publickeyhash = key.getPubKeyHash(); SegwitAddress segwitAddress = SegwitAddress.fromHash(MainNetParams.get(), publickeyhash); segwitAddress.toBech32(); System.out.println(segwitAddress.toBech32() +" "+ key.getPrivateKeyAsWiF(MainNetParams.get())); Title: Re: how to get the missing key? Post by: Sanka555 on April 19, 2021, 11:07:39 AM This is my small mistake.
Thank you very much everyone. Through joint efforts, this issue was successfully resolved. Thank you so much! |