Interesting project, Kristov. Two more ideas for fuzzing bitcoin txs: - random bit flipping from valid txs - random tx script generators: - from a grammar - from a stochastic grammar - from a random sequence of opcodes
I've made some really small experiments on fuzzing in the past [1][2], and I'm interested in helping out. Best, Manuel [1] https://github.com/maraoz/json-fuzzer [2] https://github.com/maraoz/bitcoin-fuzzer On Tue, Sep 1, 2015 at 3:03 PM, Wladimir J. van der Laan via bitcoin-dev < bitcoin-dev@lists.linuxfoundation.org> wrote: > On Tue, Sep 01, 2015 at 04:59:15PM +0000, Monarch via bitcoin-dev wrote: > > > which uses Bitcoin Core for validation. If they aren't validating > > transactions before broadcast they won't make it more than a single > > hop through the P2P the network so they are of minimum concern. > > blockchain.info had some problems here for a while. They were not using a > full validating node underneath: > > - Signatures were not verified properly. This resulted in some panic when > it looked like (on their site) a massive number of very old coins were > being spent. > > - They were relaying loose coinbase transactions. This caused them to be > instantly banned from nodes they were connected to. > > So there's certainly some scope for fun with fuzzing those APIs. > > Wladimir > > _______________________________________________ > bitcoin-dev mailing list > bitcoin-dev@lists.linuxfoundation.org > https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev >
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