|
Title: looking for technical info Post by: CanaryInTheMine on August 25, 2011, 11:09:54 PM could someone point me to where I can see code /pseudo/code for the calculation of a hash. step by step would be awesome, but anything would be helpful too.
Title: Re: looking for technical info Post by: jackjack on August 25, 2011, 11:48:54 PM could someone point me to where I can see code /pseudo/code for the calculation of a hash. step by step would be awesome, but anything would be helpful too. A hash of what?Block, transaction, address? Title: Re: looking for technical info Post by: CanaryInTheMine on August 25, 2011, 11:51:40 PM could someone point me to where I can see code /pseudo/code for the calculation of a hash. step by step would be awesome, but anything would be helpful too. A hash of what?Block, transaction? block Title: Re: looking for technical info Post by: etotheipi on August 26, 2011, 04:12:34 AM Are you talking about SHA256? The wiki is always a good place to start for that: http://en.wikipedia.org/wiki/SHA-2 (http://en.wikipedia.org/wiki/SHA-2)
If you're talking about something more specific to BTC, there are three places that hashes are used that I can think of, off the top of my head: (1) 80-byte block headers {sha256(sha256((...)} (2) Full transactions {sha256(sha256(...))} (3) Converting public keys to BTC addresses {ripemd160(sha256(...))} You can see illustrations of a full Transaction (2) and the conversion from ECDSA public key to BTC address (3) in my post: https://bitcointalk.org/index.php?topic=29416.0 (https://bitcointalk.org/index.php?topic=29416.0) Title: Re: looking for technical info Post by: WakiMiko on August 26, 2011, 01:01:33 PM blockhashing example in C: https://gist.github.com/1173353
|