[CANCELLED] C# guru's - Need signmessage & verifymessage fill in the blanks

[slothbag]

Hi All,

Any C# guru's want a quick job?  I need signmessage and verifymessage implemented, BitcoinJ code is in place, needs translating into C#.

Check out this C# project on GitHub  https://github.com/slothbag/BitcoinCryptoTest

File ECKeyPair.cs lines 90-200 have been commented out, they are a copy from BitcoinJ and obviously don't compile in C#.

The first to make this very simple program sign and verify messages compatible with Bitcoin-QT there is 1 BTC for ya.


The existing C# code is from mb300sb and his excellent C# library here https://bitcointalk.org/index.php?topic=148163.0

Update: I am cancelling the bounty for this due to lack of interest.

[doof]

Happy to look at it tomorrow, after my Brisbane meetup tonight.

[doof]

Actually, looking at it now.

[doof]

Most of it is easy fixes.

Change the static methods to not static.  No need for them.

And a issues are just case problems.  BigInteger.multiply should be BigInteger.Multiply, BigInteger.Long etc

If you go to your objectbrowser, you should see all the methods.

Gotta run to my meetup now. If the bounties not collected by tomorrow morn, ill finish it up.

[slothbag]

Yeah, should be mostly straight forward, though there are a few curly ones in there like mismatch ECKey vs ECKeyPair classes..

I had a good crack at it myself but didn't wont to spend too long on it.. I figured the crypto experts would be able to get it working pretty quick.

Submit a pull request when your done, i'll run it through a test script with 100 addresses and different messages to confirm it works before releasing the bounty.

Thanks for looking into it for me. 

[herzmeister]

i'm also ready to help out if still needed (my SO profile: http://stackoverflow.com/users/90742/herzmeister)

[paraipan]

I think people would be more willing to help if you sent the bounty in escrow on Rugatu, assuming is your question of course.

http://www.rugatu.com/questions/21141/are-there-any-gurus-at-c

[slothbag]

i'm also ready to help out if still needed (my SO profile: http://stackoverflow.com/users/90742/herzmeister)

Well no one has submitted a pull request yet.. first one to submit a working solution will get the coin.  Not ideal I know... but it's not that big of a job either.

[herzmeister]

I thought I'm nice and let the other guy first, and I'm at work right now anyway.

[doof]

i'm also ready to help out if still needed (my SO profile: http://stackoverflow.com/users/90742/herzmeister)

Well no one has submitted a pull request yet.. first one to submit a working solution will get the coin.  Not ideal I know... but it's not that big of a job either.

Cant github from work, so I just copied and paste.  Is the bounty still out?  Should finish it off in an hour.

[slothbag]

Cant github from work, so I just copied and paste.  Is the bounty still out?  Should finish it off in an hour.

Yeah mate, still available.  Send us a link or whatever when your done and i'll have a look.

[doof]

Just about done.  Theres a few Classes that don't seem to exist in bouncy castle.  Just hunting them down now.

[slothbag]

No probs, I should mention I dont want any extra dll's to be required.

All the required code should be able to be translated from the BitcoinJ library (BitcoinJ also uses Bouncy Castle).  But if you find a different class, as long as its not too bloated, that's ok too.

[mb300sd]

I haven't even looked at this code in months, but I did implement full tx signing and verification in C# here, https://github.com/mb300sd/Bitcoin-Tool/tree/master/Bitcoin%20Tool

Something might be helpful.

[slothbag]

I haven't even looked at this code in months, but I did implement full tx signing and verification in C# here, https://github.com/mb300sd/Bitcoin-Tool/tree/master/Bitcoin%20Tool

Something might be helpful.

Yeah, I tried the dataSign method you had, but the message signing required some extra work, I think because Bitcoin-QT use some compressed signature which chops out the public key or something.

[mb300sd]

I haven't even looked at this code in months, but I did implement full tx signing and verification in C# here, https://github.com/mb300sd/Bitcoin-Tool/tree/master/Bitcoin%20Tool

Something might be helpful.

Yeah, I tried the dataSign method you had, but the message signing required some extra work, I think because Bitcoin-QT use some compressed signature which chops out the public key or something.

Well, if doof doesn't get it tonight, I might have a go at it tomorrow, just have to find my original source somewhere and install VS on this new laptop

[slothbag]

Well, if doof doesn't get it tonight, I might have a go at it tomorrow, just have to find my original source somewhere and install VS on this new laptop

The GitHub project I created (linked above) has a crypto folder, which is pretty much 99% your code just cut down for this exercise.  Hopefully the submitted changes I can push back into your library.

[doof]

I haven't even looked at this code in months, but I did implement full tx signing and verification in C# here, https://github.com/mb300sd/Bitcoin-Tool/tree/master/Bitcoin%20Tool

Something might be helpful.

Yeah, I tried the dataSign method you had, but the message signing required some extra work, I think because Bitcoin-QT use some compressed signature which chops out the public key or something.

Well, if doof doesn't get it tonight, I might have a go at it tomorrow, just have to find my original source somewhere and install VS on this new laptop

Just tying to find out what this method does:  then done
Sha256Hash.createDouble(messageBytes);

[doof]

No probs, I should mention I dont want any extra dll's to be required.

All the required code should be able to be translated from the BitcoinJ library (BitcoinJ also uses Bouncy Castle).  But if you find a different class, as long as its not too bloated, that's ok too.

Yeah, that was my assumption.  Just translating...

[slothbag]

It just does a double hash.. ComputeHash(ComputeHash(data)) I believe